1- Synthesis, spectroscopic studies, thermal analyses, biological activity of tridentate coordinated transition metal complexes of bi(pyridyl-2-ylmethyl)amine]ligand. Hanan F. Abd El-Halim, Gehad G. Mohamed. J. Molecular Structure, 1104, 91-95, 2016. 2- Geometrical structures, thermal stability and antimicrobial activity of Schiff base supramolecular and its metal complexes. A.Z. El-Sonbati, M.A. Diab, A.A. El-Bindary, G.G. Mohamed, Sh.M. Morgan, M.I. Abou-Dobara, S.G. Nozha. Journal of Molecular Liquids 215, 423–442, 2016. 3- Novel synthesis of 2-imino-2H-chromene-3-carboximide metal complexes Thermal decomposition, spectral studies and antimicrobial activity evaluation. Madiha H. Soliman, Gehad G. Mohamed, Galal H. Elgemeie. J Therm Anal Calorim 123, 583–594, 2016. 4- RP-HPLC Stability-indicating Method for Estimation of Irbesartan and Hydrochlorothiazide in Bulk and Pharmaceutical Dosage Form. Tamer Awad Ali1, Gehad G. Mohamed, Ali A. Aglan, Fakiha El-Taib Heakal. Chin. J. Anal. Chem., 44(1), e1601–e1608, 2016. 5- Geometrical structures, thermal properties and antimicrobial activity studies of azodye complexes. A.Z. El-Sonbati, A.A. El-Bindary, G.G. Mohamed, Sh.M. Morgan, W.M.I. Hassan, A.K. Elkholy. Journal of Molecular Liquids 218, 16-34, 2016. 6- Geometrical structure, potentiometric, molecular docking and thermodynamic studies of azo dye ligand and its metal complexes. A.A. El-Bindary, G.G. Mohamed, A.Z. El-Sonbati, M.A. Diab, W.M.I. Hassan, Sh.M. Morgan, A.K. Elkholy. Journal of Molecular Liquids 218, 138-149, 2016. 7- Construction and Performance Characteristics of Modified Screen Printed and Modified Carbon Paste Sensors for Selective Determination of Cu(II) Ion in Different Polluted Water Samples. Tamer Awad Ali, Gehad G. Mohamed, Amal H. Said. Chemical Engineering Communications, 203, 724–735, 2016. 8- Comparison of the Electroanalytical Oxidation of Ritodrine Hydrochloride at Carbon Paste, ZrO2 Nano Particles Modified, Graphite Pencil and Glassy Carbon Electrodes. Hassan A. Hindawe, Hoda M. Elqudaby, Gehad G. Mohamed, Eglal R. Souaya, Ghada M. G. Eldin. Anal. Bioanal. Electrochem., 8(2), 234-255, 2016. 9- Novel Schiff base ligand and its metal complexes with some transition elements. Synthesis, spectroscopic, thermal analysis, antimicrobial and in vitro anticancer activity. Walaa H. Mahmoud, Reem G. Deghadi, Gehad G. Mohamed. Appl. Organometal. Chem. 30, 221–230, 2016. 10- Liquid chromatographic determination of solifenacin succinate, flavoxate hydrochloride and tolterodine tartrate in bulk drugs and their pharmaceutical dosage forms. Ali K. Attia, Eman Y.Z. Frag, Gehad G. Mohamed, Heba E. Ahmed. J. Chil. Chem. Soc., 61(1), 2772-2776, 2016. 11- Activation of Ground Granulated Blast-Furnace Slag by Cement Kiln Dust in Presence of Rice Husk Ash. A. H. Ali, Gehad G. Mohamed and Amira A. Elsaman. Nature and Science 14(8), 123-128, 2016. 12- Preparation, Characterization of Metallic Iron and Bimetallic Iron/Copper Nanoparticles and their Application for the Removal of Trihalomethanes from Potable Water. Abeer M.E. Hassan, S.A. Abo El-Enein, Gehad G. Mohamed, Amr.I. Mohamed. Jokull Journal, 66(7), 2-23, 2016. 13- Olive cake as low cost adsorbent for sequestration of Fe(II) and Mn(II) from aqueous solutions. Moataz M. Abdel Hameed, Ahmed A. El-kady, Hany H. Abdel Ghafar, Gehad G. Mohamed, Mahmoud S. Rizk. New York Science Journal, 9(8), 91-102, 2016. 14- An assessment for the recovery of lanthanides and P2O5 from phosphate rocks. M.S. Alshammari, I.M. Ahmed, A.A Nayl, H.F. Aly, Gehad G. Mohamed, S. Abdel Rahman Mostafa. Advances in Environmental Biology, 10(9), 49-53, 2016. 15- Synthesis, characterization and in vitro antimicrobial and anti-breast cancer activity studies of metal complexes of novel pentadentate azo dye ligand. Walaa H. Mahmoud, Fatma N. Sayed and Gehad G. Mohamed. Appl. Organometal. Chem. 30(7), 959–973, 2016. 16- Preparation, Spectroscopic, Theoretical Thermodynamic and Antimicrobial Discussions of Zr(IV), Ce(III) and Th(IV) Ibuprofen Drug Complexes. Moamen S. Refat, Gehad G. Mohamed, Mohamed Y. El-Sayed, Hamada M. A. Killa, Hammad Fetooh, Mohamed A. Al-Omar, and Ahmed M. Naglah. J. Comput. Theor. Nanosci. 13, 5269–5276, 2016. 17- Mixed-ligand complex formation of tenoxicam drug with some transition metal ions in presence of valine: Synthesis, characterization, molecular docking, potentiometric and evaluation of the humeral immune response of calves. Gehad G. Mohamed, Ahmed A. El-Sherif, Mohamed A. Saad, Sara E.A. El-Sawy, Sh. M. Morgan. Journal of Molecular Liquids 223, 1311–1332, 2016. 18- Spectroscopic and thermal characterization of biologically and anticancer active novel Schiff base metal complexes. Walaa H. Mahmoud, Reem G. Deghadi, Gehad G. Mohamed. Res. Chem. Intermed. 42, 7869–7907, 2016. 19- Manufacture of Lead-Specific Screen-Printed Sensor Based on Lead Schiff Base Complex as Carrier and Multi-Walled Carbon Nanotubes for Detection of Pb(II) in Contaminated Water Tests. Tamer Awad Ali, Abeer M.E. Hassan, Gehad G. Mohamed. Int. J. Electrochem. Sci., 11, 10732 – 10747, 2016. 20- Sensitive Electrochemical Behavior of Cinchocaine Hydrochloride at Activated Glassy Carbon and Graphite Pencil Electrodes. Hoda.M. Elqudaby, Hassan A.M. Hendawy, Eglal R. Souaya, Gehad G. Mohamed, Ghada M. G. Eldin. International Journal of Pharmaceutical Analysis, 40(2), 1269-1284, 2016. 21- Utility of Activated Glassy Carbon and Pencil Graphite Electrodes for Voltammetric Determination of Nalbuphine Hydrochloride in Pharmaceutical and Biological Fluids. Hoda M. Elqudaby, Hassan A. M. Hendawy, Eglal R. Souaya, Gehad G. Mohamed, Ghada M. G. Eldin. International Journal of Electrochemistry, 2016, 1-9, 2016. 22- Electrochemical determination of N-(1,1,2,2-tetrahydroperfluorooctyl)-N,N-dimethylammonium chloride surfactant in different water samples using modified screen printed electrode. T.A. Ali, M.H. Soliman, G.G. Mohamed. Int. J. Electrochem. Sci., 11(2), 1055-1069, 2016. 23- Construction and performance characteristics of chemically modified carbon paste electrodes for the selective determination of Co(II) ions in water samples. Tamer Awad Alia, Gehad G. Mohamed, M.M. Omar, Noha M. Hanafy. Journal of Industrial and Engineering Chemistry, 47, 102–111, 2017. 24- Preparation, geometric structure, molecular docking thermal and spectroscopic characterization of novel Schiff base ligand and its metal chelates Screening their anticancer and antimicrobial activities. Walaa H. Mahmoud, Reem G. Deghadi, Gehad G. Mohamed. J Therm Anal Calorim, 127(3), 2149–2171, 2017. 25- Spectrophotometric Determination of Melatonin Drug in its Pure and Dosage Forms Using Potassium Ferricyanide-Fe(III) System. Marwa El-Badry Mohamed, Maher M. Hamed, Nadia G. Zaki, Mohamed M. Abdou, Gehad G. Mohamed, Abanoub M. Abdallah. Asian Journal of Organic and Medicinal Chemistry, 2(1), 37-41, 2017. 26- Melatonin charge transfer complex with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone: Molecular structure, DFT studies, thermal analyses, evaluation of biological activity and utility for determination of melatonin in pure and dosage forms. Gehad G. Mohamed, Maher M. Hamed, Nadia G. Zaki, Mohamed M. Abdou, Marwa El-Badry Mohamed, Abanoub Mosaad Abdallah. Spectrochimica Acta Part A, 182, 143–159, 2017. 27- Development of Crude Oil Reference Material Certified for the Concentrations of Sulfur, Iron, Nickel, Vanadium and Magnesium. A.B. Shehata, G.G. Mohamed, M.A. Gab-Allah. MAPAN-Journal of Metrology Society of India, 32(2), 101–112, 2017. 28- Synthesis, spectral, thermal and biological studies of mixed ligand complexes with newly prepared Schiff base and 1,10-phenanthroline ligands. Hanan F. Abd El-Halim, Gehad G. Mohamed, Eman A.M. Khalil. Journal of Molecular Structure 1146, 153-163, 2017. 29- Development of Novel Potentiometric Sensors for Determination of Lidocaine Hydrochloride in Pharmaceutical Preparations, Serum and Urine Samples. Tamer Awad Ali, Gehad Genidy Mohamed, Ghada A. Yahya. Iranian Journal of Pharmaceutical Research, 16(2), 498-512, 2017. 30- Preparation, Characterization and Biological Activity Evaluation of some Metal Complexes from Novel Schiff Bases based on Ambroxol Drug. Walaa H. Mahmoud, Mostafa M.H Khalil, Hoda A. Elsawy, Gehad G. Mohamed, Mostafa A. Radwan. International Journal of Advanced Scientific Research and Management, 2(8), 98-112, 2017. 31- Removing Heavy Metals from Industrial Wastewater Using Cement Kiln Dust and Electric Arc Furnace Dust as Industrial By-Products. S.A. Abo-El-Enein, M.S. Attia, M.M. Ali, G.G. Mohamed, M.S.S. Soliman. Egyptian Journal of Environmental Research, 6, 41-67, 2017. 32- A novel screen-printed and carbon paste electrodes for potentiometric determination of uranyl(II) ion in spiked water samples. Tamer Awad Ali, Gehad G. Mohamed, Refat F. Aglan, and Mai A. Mourad. Russian Journal of Electrochemistry, 53(11), 1242–1256, 2017. 33- Impact of extreme climate events on water supply sustainability in Egypt: case studies in Alexandria region and Upper Egypt. Ahmed G. Yehia, Khaled M. Fahmy, Mahmoud A. S. Mehany and Gehad G. Mohamed. Journal of Water and Climate Change, 08(3), 484-494, 2017. 34- New nanobidentate Schiff base ligand of 2aminophenol with 2-acetyl ferrocene with some lanthanide metal ions: synthesis, characterization and Hepatitis A, B, C and breast cancer docking studies. Walaa H. Mahmoud, Nessma F. Mahmoud, Gehad G. Mohamed. Journal of Coordination Chemistry, 70(20), 3552–3574, 2017. 35- Potentiometric Determination of Cyanide in Polluted Water Samples Using Screen-Printed Electrode modified with Ruthenium(II) Complexes Ionophores. Tamer Awad Ali, Gehad G. Mohamed, Amr L Saber, Layla S. Almazroai. Int. J. Electrochem. Sci., 12, 11904 – 11919, 2017. 36- Spectroscopic characterization, thermal, antimicrobial and molecular docking studies on nano-size mixed ligand complexes based on sudan III azodye and 1,10-phenanthroline. Walaa H. Mahmoud, Gehad G. Mohamed, Sabrine Y. A. Mohamedin. J Therm Anal Calorim, 130(3), 2167–2184, 2017. 37- Fabrication of chemically and in situ modified carbon paste electrodes for the potentiometric determination of chlorpromazine HCl in pure pharmaceutical preparations, urine and serum. Gehad G. Mohamed, Eman Y. Z. Frag, M. A. Zayed, M. M. Omar and Sally E. A. Elashery. New Journal of Chemistry, 41, 15612—15624, 2017. 38- Spectroscopic and thermal degradation behavior of Mg(II), Ca(II), Ba(II) and Sr(II) complexes with paracetamol drug. Moamen S. Refat, Gehad G. Mohamed, Mohamed Y. El-Sayed, Hamada M.A. Killa, Hammad Fetooh. Arabian Journal of Chemistry, 10, S2376–S2387, 2017. 39- New bioactive Pt(II) binary and ternary metal complexes with guaifenesin drug: Synthesis, geometrical structure, and spectroscopic and thermal characterization. Walaa H. Mahmoud, Gehad G. Mohamed, Nessma F. Mahmoud. Appl. Organometal. Chem., 31:e3583, 1-11, 2017. 40- Preparation, characterization, biological activity, density functional theory calculations and molecular docking of chelates of diazo ligand derived from m-phenylenediamine and p-chlorophenol. Walaa H. Mahmoud, Gehad G. Mohamed, Ahmed M. Refat. Appl Organometal Chem., 31:e3753, 1-19, 2017. 41- Synthesis, physicochemical characterization, geometric structure and molecular docking of new biologically active ferrocene based Schiff base ligand with transition metal ions. W.H. Mahmoud, N.F. Mahmoud, Gehad G. Mohamed. Appl Organometal Chem., 31:e3858, 1-19, 2017. 42- Simple spectrophotometric method for determination of iron in crude oil. A.B. Shehata, G.G. Mohamed, M.A. Gab-Allah. Petroleum Chemistry, 57(12), 1007-1011, 2017. 43- Adsorption of copper(II) and zinc(II) ions from aqueous solution by activated carbon derived from halophytes (Suaeda maritime). Mohamed M. El-Bouraie, Gehad G. Mohamed. Desalination and Water Treatment, 94, 198–210, 2017. 44- Mixed ligand complexes of the novel nanoferrocene based Schiff base ligand (HL): Synthesis, spectroscopic characterization, MOE studies and antimicrobial/anticancer activities. Walaa H. Mahmoud, Nessma F. Mahmoud, Gehad G. Mohamed. J. Organometal Chem.848, 288-301, 2017. 45- Coordination compounds of some transition metal ions with new Schiff base ligand derived from dibenzoyl methane. Structural characterization, thermal behavior, molecular structure, antimicrobial, anticancer activity and molecular docking studies. Walaa H. Mahmoud, Gehad G. Mohamed, Omnia Y. El-Sayed. Appl Organometal Chem.32, e4051, 1-21, 2018. 46- Antimicrobial and anticancer activities of Schiff base ligand and its transition metal mixed ligand complexes with heterocyclic base. H.F. Abd El-Halim, Gehad G. Mohamed, Mahmoud N. Anwar. Appl Organometal Chem.32, e3899, 1-12, 2018. 47- Structural investigation, molecular structure and molecular docking of solifenacin succinate, flavoxate hydrochloride and tolterodine tartrate anti-cholinergic drugs Correlation using thermal analysis and mass spectral fragmentation. Ali K. Attia, Gehad G. Mohamed, Heba E. Ahmed. J Therm Anal Calorim, 131:1345–1360, 2018. 48- Molecular structure, molecular docking, thermal,spectroscopic and biological activity studies of bis-Schiff base ligand and its metal complexes. Ehab M. Zayed, Ahmed M.M. Hindy, Gehad G. Mohamed. Appl Organometal Chem., 32:e3952, 1-16, 2018. 49- Spectroscopic characterization and molecular docking studies of acetyl ferrocene-derived Schiff base ligand with phenanthroline and some transition metal ions. W.H. Mahmoud, N.F. Mahmoud, G.G. Mohamed. J. Thermal Analysis and Calorimetry, 131(3), 2775-2793, 2018. 50- A Novel Screen-Printed and Carbon Paste Electrodes for Potentiometric Determination of Uranyl(II) Ion in Spiked Water Samples. Tamer Awad Ali, Gehad G. Mohamed, Refat F. Aglan and Mai A. Mourad. Russian Journal of Electrochemistry, 54 (2), 201–215, 2018. 51- Synthesis, spectroscopic, thermal analyses, biological activity and molecular docking studies on mixed ligand complexes derived from Schiff base ligands and 2,6-pyridine dicarboxylic acid. Hanan F. Abd El-Halim, Gehad G. Mohamed. Appl Organometal Chem. 32:e4176, 1-16, 2018. 52- Metal complexes of novel Schiff base derived from iron sandwiched organometallic and 4-nitro-1,2-phenylenediamine: Synthesis, characterization, DFT studies, antimicrobial activities and molecular docking. Walaa H. Mahmoud, Reem G. Deghadi, Gehad G. Mohamed. Appl Organometal Chem. 32:e4289, 1-22, 2018. 53- Radioiodination and Biological Evaluation of Tizanidine as a Potential Brain Imaging Agent. M.A. Mourad, H. Abd El-Aziz, A.M. Amin, G.G. Mohamed, S.A. Abo El-Enein. Arab J. Nucl. Sci. Appl, 51(2), 107 -115, 2018. 54- Azo dye with nitrogen donor sets of atoms and its metalcomplexes: Synthesis, characterization, DFT, biological,anticancer and Molecular docking studies. Walaa H. Mahmoud, Fatma N. Sayed, Gehad G. Mohamed. Appl Organometal Chem. 32:e4347, 1-19, 2018. 55- Synthesis, characterization, density functional theory, X‐ray study, thermal stability, and biological and MOE relevance of metal complexes of griseofulvin. Walaa H. Mahmoud, Nessma F. Mahmoud, Gehad G. Mohamed. Appl Organometal Chem. 32:e4312, 1-18, 2018. 56- Spectroscopic, thermal, biological activity, moleculardocking and density functional theoretical investigation ofnovel bis Schiff base complexes. Ehab M. Zayed, Gehad G. Mohamed, Walid M.I. Hassan, Asmaa K. Elkholy, H. Moustafa. Appl Organometal Chem. 32:e4375, 1-20, 2018. 57- Synthesis, characterization, spectroscopic and theoretical studies of transition metal complexes of new nano Schiff base derived from L-histidine and 2-acetylferrocene and evaluation of biological and anticancer activities. Walaa H. Mahmoud, M.M. Omar, Fatma N. Sayed, Gehad G. Mohamed. Appl Organometal Chem. 32:e4386, 1-18, 2018. 58- Metal complexes of novel Schiff base derived from the condensation of 2-quinoline carboxaldehyde and ambroxol drug with some transition metal ions. Walaa H. Mahmoud, Gehad G. Mohamed, Hoda A. Elsawy, Mostafa A. Radwan. Appl Organometal Chem. 32:e4392, 1-14, 2018. 59- Potentiometric determination of terbinafine hydrochloride antifungal drug in pharmaceutical and biological fluids using ion selective electrodes. Tamer Awad Ali, Samah M. abdelsabour, Hassan Eldessouky, Gehad G. Mohamed, Yasmin Salah Eldin Elsayed. J. Basic and Environmental Sciences, 5, 80-92, 2018. 60- Coordination behaviour and biological activity studies involving theoretical docking of bis‐Schiff base ligand and some of its transition metal complexes. Ehab M. Zayed, Mohamed A. Zayed, Ahmed M.M. Hindy, Gehad G. Mohamed. Appl Organometal Chem. 32:e4603, 1-12, 2018. 61- Zinc complexes of novel Schiff bases derived from 1,8-diaminonaphthalene: Synthesis, characterization and biological activity evaluation. Walaa H. Mahmouda, Ahmed M. Refaata, Gehad G. Mohamed. International Journal Of Modern Engineering Research, 8(11), 53-61, 2018. 62- Distribution and health hazards of polycyclic aromatic hydrocarbons in Egyptian milk and dairy-based products. El-Shaimaa A.Rawash, Gehad G. Mohamed, Eglal R. Souaya, Lele H. Khalil, Ghadir A. El-Chaghaby and Mohamed H. El-Gammal. Beverages 4(63), 1-12, 2018. 63- Potentiometric determination of mercury (II) ion in various real samples using novel modifed screen‑printed electrode. Refaat F. Aglan, Hosam M. Saleh, Gehad G. Mohamed. Applied Water Science, 8(141), 1-11, 2018. 64- Simultaneous Determination of Moexipril Hydrochloride and Hydrochlorothiazide by RP-HPLC and Ratio Spectra Derivative Spectrophotometric Methods in Pure, Pharmaceutical Dosage Forms and Biological Fluids. Gehad G Mohamed, Shabaan A Abdulla, Heba EA Abd Elhafez. Journal of Chemical and Pharmaceutical Research, 10(10): 133-153, 2018. 65- A Potentiometric Sensor for Determination of Doxycycline Hydrochloride in Pharmaceutical Preparation and Biological Fluids. T.A. Ali, G.G. Mohamed, A.Z. El-Sonbati, M.A. Diab, A.M. Elkfass. Russian Journal of Electrochemistry, 54(12), 1081–1095, 2018. 66- Physicochemical and radiation hazardous properties of scale Tenorm waste evaluation by different analytical techniques. M.A. Hilal, H.M. Abdelbary, G.G. Mohamed. Radiochemistry, 60, 444-449, 2018. 67- The potential anticancer effect of [Cadmium-N Acetyl cysteine] as novel drug therapy for mammary cancer induced by Di Methyl Benzene Anthanthrene in rats. Omayma A.R. AbouZaid, Eman Noaman, Shaimaa abdel-Ati, Gehad Genidy Mohamed. Benha Veterinary Medical Journal, 34(3), 232-245, 2018. 68- In Vitro Study of Anticancer Effect of N Acetyl Cysteine–Metal Complexes as New Target Drugs on Human Cancer Cell Lines. Omayma A. R. AbouZaid, Eman Noaman, Shaimaa abdelAti, Gehad Genidy Mohamed. Benha Veterinary Medical Journal, 34(3), 206-217, 2018. 69- Photocatalytic degradation of anthracene in aqueous dispersion of metal oxides nanoparticles: Effect of different parameters. Mahmoud A. Sliem, Ahmed Youssef Salim, Gehad Genidy Mohamed. Journal of Photochemistry and Photobiology A: Chemistry, 371(15), 327-335, 2019. 70- A novel and highly efficient photocatalytic degradation of malachite green dye via surface modified polyacrylonitrile nanofibers/biogenic silica composite nanofibers. Alaa Mohamed, Mohamed M. Ghobar, M.K. Abdelmaksoud, Gehad G. Mohamed. Separation and Purification Technology, 210, 935-945, 2019. 71- Transition metal complexes of nano bidentate organometallic Schiff base: Preparation, structure characterization, biological activity, DFT and molecular docking studies. Walaa H. Mahmoud, Reem G. Deghad, Maher M.I. El Desssouky, Gehad G. Mohamed. Appl Organometal Chem. 33:e4556, 1-21, 2019. 72- Optimization and Validation of an Extraction Method for the Analysis of Polycyclic Aromatic Hydrocarbons in Potato chips using gas chromatography-mass spectrometry. El-Shaimaa A. Rawash, Gehad G. Mouhamed, Eglal R. Souaya and Ghadir A El-Chaghaby. Res. J. Chem. Environ., 23(1), 17-31, 2019. 73- Coordination behaviour, molecular docking, density functional theory calculations and biological activity studies of some transition metal complexes of bis‐Schiff base ligand. Ehab M. Zayed, Ahmed M.M. Hindy, Gehad G. Mohamed. Appl Organometal Chem.; 33:e4525, 1-14, 2019. 74- Synthesis, characterization, theoretical study and biological activity of Schiff base nanomaterial analogues. G.G. Mohamed, W.H. Mahmoud, M.A. Diab, A.Z. El-Sonbati, S.Y. Abbas. J. Mol. Str. 1181, 645-659, 2019. 75- Inner metal complexes of tetradentate Schiff base: Synthesis, characterization, biological activity and molecular docking studies. M.A. Diab, Gehad G. Mohamed, W.H. Mahmoud, A.Z. El-Sonbati, Sh.M. Morgan, S.Y. Abbas. Appl Organometal Chem.; 33:e4945, 1-13, 2019. 76- Photodegradation of organic dyes by PAN/SiO2-TiO2-NH2 nanofiber membrane under visible light. Alaa Khalil, Nada M. Aboamer, Walaa S. Nasser, Walaa H. Mahmoud, Gehad G. Mohamed. Separation and Purification Technology, 224, 509-514, 2019. 77- Modified Screen-Printed and Carbon Paste as Ion-Selective Electrodes for the Determination of Ramipril Drug in Pharmaceutical and Biological Samples. Gehad G. Mohamed, Eman Yossri Frag, Marwa El Mohamed, Mohamed O. Elhassan. Analytical Chemistry Letters, 9(3), 311-328, 2019. 78- Physicochemical characterization of nanobidentate ferrocenebased Schiff base ligand and its coordination complexes: Antimicrobial, anticancer, density functional theory, and molecular operating environment studies. Walaa H. Mahmoud, Nessma F. Mahmoud, Gehad G. Mohamed. J. Chinese Chem Soc., 66(8),945–959, 2019. 79- Synthesis, characterization of Schiff base metal complexesand their biological investigation. A.Z. El‐Sonbati, W.H. Mahmoud, Gehad G. Mohamed, M.A. Diab, Sh.M. Morgan, S.Y. Abbas. Appl Organometal Chem.; 33:e5048, 1-13, 2019. 80- A nanoparticle modified carbon paste sensor for electrochemical determination of the antidepressant agent vilazodone. Amany M. Fekry, Gehad G. Mohamed, Fekria M. Abou Attia, Neveen S. Ibrahim, Shereen M. Azab. Journal of Electroanalytical Chemistry, 848, 2019, 113305-113316, 2019. 81- Polymer complexes. LXXVII. Synthesis, characterization, spectroscopic studies and immune response in cattle of quinoline polymer complexes. A.Z. El-Sonbati, M.A. Diab, G.G. Mohamed, M.A. Saad, Sh.M. Morgan, S.E.A. El-Sawy. Appl Organometal Chem.; 33:e4973, 1-13, 2019. 82- Theoretical studies of new Schiff base ligand derived from1,3‐diaminopropane and 2-acetyl ferrocene and studyingsome applications of its metal complexes. Fatma N. Sayed, Walaa H. Mahmoud, M.M. Omar, Gehad G. Mohamed. Appl Organometal Chem.; 33:e5143, 1-18, 2019. 83- Potentiometric determination of alfuzosin hydrochloride in pharmaceutical preparations and biological fluids using modified carbon paste electrodes. Alaa A.A.M. Hasseb, Gehad G. Mohamed, Sally E.A. Elashery. J. Basic and Environmental Sciences, 6, 318-323, 2019. 84- Construction and characterization of nano iron complex ionophore for electrochemical determination of Fe(III) in pure and various real water samples. Tamer Awad Ali, Walaa H. Mahmoud, Gehad G. Mohamed. Appl Organometal Chem.; 33:e5206, 1-17, 2019. 85- Ion selective electrodes based on methyl 6-(hydroxymethyl) picolinate ionophore for electrochemical determination of Fe(III) in petroleum water samples. Tamer Awad Ali, Gehad G. Mohamed, Hassan Eldessouky, A-El. Adeeb. Egyptian Journal of Petroleum, 28, 233-239, 2019. 86- Effect Titanium Dioxide / Paraloid B.72 Nanocomposite Coating on Protection of Treated Cu-Zn Archaeological Alloys. Abeer Gharib, Manal Ahmed Maher, Sameh Hamed Ismail, Gehad Genidy Mohamed. International J. Archeology, 7(2), 47-53, 2019. 87- Preparation, structural characterization, antimicrobial and anticancer activities, DFT and molecular docking studies of a nano ferrocenyl Schiff base and its metal complexes. Walaa H Mahmoud, Reem G Deghadi, Gehad G Mohamed. Indian Journal of Chemistry, 58A, 1319-1337, 2019. 88- Antibacterial and DFT and Molecular docking studies of metformin complex as active material for the fabrication of Cu(II) selective potentiometric selective potentiometric sensor. Eman Yossri Frag, Marwa E. Mohamed, Gehad G. Mohamed, Elham M. Fahim. Appl Organometal Chem.; 33(8):e4986, 2019. 89- Structural, spectroscopic, molecular docking, thermal and DFT studies on metal complexes of bidentate orthoquinone ligand. Ehab M. Zayed, Fatma A. El‐Samahy, Gehad G. Mohamed. Appl Organometal Chem.; 33(9):e5065, 2019. 90- Comparative study between two fabricated potentiometric sensors to enhance selectivity towards ferrous ion. Eman Yossri Frag, Marwa El Badry Mohamed, Gehad G. Mohamed, Yasser Samy. Appl Organometal Chem.; 33(9):e5107, 2019. 91- Isolation, molecular characterization and expression of nitrite reductase gene from egyptian spinach. Warda A.M. Hashim, Said Abd ELRahman, Gehad G. Mohamed, Ahmed M.K. Nada, Rania M. I. Abou Ali. International Journal of Bio-Technology and Research, 9(2), 1–14, 2019. 92. Thin Films in Triboelectric Nanogenerators for Blue Energy Harvesting: Fabrication, Characterization, and Modeling. Y.M. Shabana, Gehad G. Mohamed, A. Ibrahim, M. Abbas, M. Mohie, M. Elhusseiny, M. Gamal, M. Ahmed, A. Ahmed, M. Khaled, A. Magdy. Key Engineering Materials, 835, 335-346, 2020. 93- Transition metal complexes of Schiff base ligand based on 4,6-diacetyl resorcinol. Walaa H. Mahmoud, M.M. Omar, Yasmin M. Ahmed, Gehad G. Mohamed. Appl Organometal Chem.; 33(9):34:e5528, 1-20, 2020. 94- Potentiometric sensors selective for Cu(II) determination in real water samples and biological fluids based on graphene and multi-walled carbon nanotubes modified graphite electrodes. Eman Y Z Frag, Marwa E Mohamed, Aya E Ali, Gehad G Mohamed. Indian Journal of Chemistry, 59A, 162-173, 2020. 95- Removal of anionic and cationic dyes from wastewater by adsorption using multiwall carbon nanotubes. Ola A. Shabaan, Hossam S. Jahin, Gehad G. Mohamed. Arabian J Chem., 13, 4797-4810, 2020. 96- Potentiometric determination of oxybutynin hydrochloride in pharmaceutical formulations at modified carbon paste electrodes. Maysa R Mostafaa, Gehad G Mohamed, Marwa E Mohameda, Eman Y Z Frag. Indian Journal of Chemistry, 59A, 324-332, 2020. 97- Metal complexes of ferrocenyl-substituted Schiff base: Preparation,characterization, molecular structure, molecular docking studies, and biological investigation. Walaa H. Mahmoud, Reem G. Deghadi, Gehad G. Mohamed. J. Organometallic Chemistry, 917, 121113, 2020. 98- Synthesis, Spectroscopic Characterization, Molecular Docking, and Evaluation of Antibacterial Potential of Transition Metal Complexes Obtained Using Triazole Chelating Ligand. Najlaa S.Al-Radadi, Ehab M. Zayed, Gehad G. Mohamed, Hayam A. Abd ElSalam. Journal of Chemistry, 2020, 1548641, 1-12, 2020. 99- Cyclometalated complexes containing ferrocenyl Schiff base: Preparation, characterization, DFT calculations, application in cancer and biological researches and MOE studies. Walaa H. Mahmoud, Reem G. Deghadi, Gehad G. Mohamed. Arabian J Chemistry, 13, 5390-5405, 2020. 100- A highly sensitive, selective and renewable carbon paste electrode based on a unique acyclic diamide ionophore for the potentiometric determination of lead ions in polluted water samples. M.A. Zayed, Walaa H. Mahmoud, Ashraf A. Abbas, Aya E. Ali, Gehad G. Mohamed. RSC Advances, 10, 17552-17560, 2020. 101- Structural characterization, thermal, DFT, cytotoxicity, and antimetastatic properties of cocaine complexes with La(III), Er(III), and Yb(III). Nadia G. Zaki, Walaa H. Mahmoud, Ahmed M. El Kerdawy, Abanoub Mosaad Abdallah, Gehad G. Mohamed. Research on Chemical Intermediates, 46, 3193–3216, 2020. 102. Infuence of organic modifer structures of 2D clay layers on thermal stability, fammability and mechanical properties of their rubber nanocomposites. Nour F. Attia, Gehad G. Mohamed, Mohamed M. Ismail, Taha T. Abdou. J. Nanostructure in Chemistry, 10,161–168, 2020. 103- Simultaneous determination of some antidepressant drugs and vitamin B12in pharmaceutical products and urine sample using HPLC method. Gehad G. Mohamed, Amany M. Fekry, Fekria M. Abou Attia, Neveen S. Ibrahim, Shereen M. Azab. J Chromatography B, 1150, 122178, 2020. 104- Nano Schiff Base and Its Metal Complexes: Synthesis, Characterization Tools, Biological Applications and Molecular Docking Studies. Walaa H. Mahmoud, Ahmed M. Refaat, Gehad G. Mohamed. Egypt. J. Chem., 63(6), 2157-2176, 2020. 105- Synthesis and Characterization of Florfenicol-Silver Nanocomposite and its Antibacterial Activity against some Gram Positive and Gram-Negative Bacteria. Fady Sayed Youssef, Hossny Awad Elbanna, Hisham Youssef Elzorba, Ahmed Mohamed Galal, Gehad G Mohamed and Sameh H Ismail. Int. J. Vet. Sci., 9(3), 324-330, 2020. 106- Construction and spectroscopic characterization of carbon potentiometric sensors zirconium selective. Gehad G. Mohamed, Hala A. Mohamed, Eman Yossri Frag. Microchemical Journal, 157, 105063, 2020. 107- Structural Characterization, Thermal Analyses, Antiproliferative and Antimicrobial Activity of Cocaine Complexes with Mn(II) and Cu(II). Nadia G. Zaki, Walaa H. Mahmoud, Ahmed M. El Kerdawy, Abanoub Mosaad Abdallah, Gehad G. Mohamed. Egypt. J. Chem., 63(5), 1857-1868, 2020. 108- Electrochemical Performance of Screen Printed Sensors for Potentiometric Determination of Anticholinergic Oxybutynine Hydrochloride in Pharmaceutical Formulations and Biological Fluids. Maysa R. Mostafa, Gehad G. Mohamed, Tamer A. Ali, Eman Y.Z. Frag, Marwa E. Mohamed. Egypt. J. Chem., 63(5), 1799-1809, 2020. 109- Fabrication of ionic liquid-cellulose-silica hydrogels with appropriate thermal stability and good salt tolerance as potential drilling fluid. Mohamed A. Betiha, Gehad G. Mohamed, Nabel A. Negm, Modather F. Hussein, Hany E. Ahmed. Arabian J. Chemistry, 13, 6201-6220, 2020. 110- Synthesis, spectral, MOE and cytotoxic studies of nano Ru(III), Pr(III) and Gd(III) metal complexes with new Schiff base ligand based on dibenzoyl methane and anthranilic acid. Nessma F. Mahmoud, Walaa H. Mahmoud, Gehad G. Mohamed. Applied Organometallic Chemistry, 34:e5801, 1-21, 2020. 111- Metal complexes of tetradentate azo-dye ligand derived from 4,4`-oxydianiline: Preparation, structural investigation, biological evaluation and MOE studies. Reem G. Deghadi, Walaa H. Mahmoud, Gehad G. Mohamed. Appl Organomet Chem. 34, e5883, 1-20, 2020. 112- Humidity Sensing Behaviour of Lyophilized rGO/Fe2O3 Nanocomposite. M. Morsy, M. M. Mokhtar, Sameh H. Ismail, Gehad G. Mohamed, M. Ibrahim. J. of Inorganic and Organometallic Polymers and Materials, 30(10), 4180-4190, 2020. 113- Development and surface characterization of a bis(aminotriazoles) derivative based renewable carbon paste electrode for selective potentiometric determination of Cr(III) ion in real water samples. M.A. Zayed, Ashraf A. Abbas, Walaa H. Mahmoud, Aya E. Ali, Gehad G. Mohamed. Microchemical Journal 159, 105478, 2020. 114- Nano-Azo Ligand and Its Superhydrophobic Complexes: Synthesis, Characterization, DFT, Contact Angle, Molecular Docking, and Antimicrobial Studies. Gehad G. Mohamed, Walaa H. mahmoud, Ahmed M. Refat. J. Chemistry, 2020, 1-19, 2020. 115- Spectroscopic studies, Density Functional Theory calculations, and non-linear optical properties of binuclear Fe(III), Co(II), Ni(II), Cu(II), and Zn(II) complexes of OONN Schiff base ligand. Hussein Moustafa, Gehad G. Mohamed, Salwa Elramly. J. Chinese Chem. Soc., 67, 1783-1793, 2020. 116- Highly sensitive electrochemical sensor determination of drug in pharmaceutical analysis. Tamer Awad Ali, Gehad G. Mohamed, Hassan El-Dessouky, Dina Abdeen. Egyptian J. Chemistry, 63(8), 2933-2946, 2020. 117- Selective potentiometric sensors for the determination of butenafine hydrochloride in a cream formulation. Eman Y. Frag, Marwa El badry Mohamed, Gehad G. Mohamed, Mona Shehatta Ebrahim. Microchemical Journal, 157, 104870, 2020. 118- Preparation, characterization and biological activity of novel Schiff base complexes based on La, Er and Yb metal ions. Hoda A. Elsawy, Walaa H. Mahmoud, Islam M. Al-Akraa, Gehad G. Mohamed. ARPN Journal of Engineering and Applied Sciences, 15(3), 295-303, 2020. 119- Heterolyptic complexes of cocaine/TMEDA with some f block metals: synthesis, DFT studies, spectral, thermal, cytotoxicity and antimetastatic properties. N.G. Zaki, W.H. Mahmoud, A.M. El-Kerdawy, A.M. Abdallah, Gehad G. Mohamed. Spectrochimica Acta, Part A, 229, 117938- , 2020. 120- Comparative killing activity of different nanoparticles and nano-composites based on dermanyssusgallinae. Sameh Ismail, Gehad Mohamed, Aziza Amer, Mohamed Amer. Nano Biomedicine and Engineering, 12(4), 338-350, 2020. 121- New Potentiometric Screen-printed Sensors for Determination of Trimebutine Drug in Tablets, Serum and Urine Samples Tamer Awad Ali, Gehad Genidy Mohamed, Adel Zaki El-Sonbati, Mostafa Amin Diab, Ahmed Mohmed Elkfass. Iranian Journal of Pharmaceutical Research, 19 (3), 533-555, 2020. 122- The performance characteristics of various SWCNT loading into CuO-PMMA nanocompoiste towards the detection of Mn2+ ions. Dina F. Katowah, Qana A. Alsulami, M.M. Alam, Sameh H. Ismail, Abdullah M. Asiri, Gehad G. Mohamed, Mohammed M. Rahman, Mahmoud A. Hussein. J. of Inorganic and Organometallic Polymers and Materials, 30, 5024-5041, 2020. 123- Selective Determination of Copper(II) Based on Cu(II)-MetalOrganic Framework in different Water Samples. Ehab S. Gad, Tamer Awad Ali, Amr A-E.Elsayed, Gehad G. Mohamed, H. A. El-Bary. Int. J. Electrochem. Sci., 15, 11904 – 11919, 2020. 124- Screen printed ion selective electrodes based on self-assembled thiol surfactant-gold-nanoparticles for determination of Cu(II) in different water samples. Tamer Awad Ali, Ali A. Abd-Elaal, Gehad G. Mohamed. Microchemical Journal, 160, 105693, 2021. 125- Antifouling PES/Cu@Fe3O4 mixed matrix membranes: Quantitative structure–activity relationship (QSAR) modeling and wastewater treatment potentiality. Ahmed Abdel-Karima, Sameh H. Ismail, Ahmed M. Bayoumy, Medhat Ibrahimd, Gehad G. Mohamed. Chemical Engineering Journal, 407, 126501, 2021. 126- Exploring ATR Fourier transform IR spectroscopy with chemometric analysis and laser scanning microscopy in the investigation of forensic documents fraud. S. Farid, M.A. Kasem, A.F. Zedan, G.G. Mohamed, A. El-Hussein. Optics & Laser Technology 135, 106704, 2021. 127- Characterization of supermagnetic/monodisperse PEG-coated magnetitie nanoparticles sonochemically prepared from the hematite ore for Cd(II) removal from aqueous solutions. Ahmed hamdy, Sameh H. Ismail, A.A. Ebnalwaled, Gehad G. Mohamed. J. of Inorganic and Organometallic Polymers and Materials, 31(1), 397-414, 2021. 128- Synthesis, Characterization and In vitro Antimicrobial Activity of Florfenicol-Chitosan Nanocomposite. Fady Sayed Youssef, Gehad G. Mohamed, Sameh H. Ismail, Hisham Youssef Elzorba, Ahmed Mohamed Galal, Hossny Awad Elbanna. Egyp. J. Chem., 64(2), 941-948, 2021. 129- Preference of Using Nano Silica\Magnetite Core-Shell on Enhancement Mechanical and Morphological Properties of Cement Mortar. Khaled Abdelsamie, Ahmed Attia M. Drar, Gehad G. Mohamed, Sameh H. Ismail. International Journal of Advanced Research in Engineering and Technology, 12 (01), 53-66, 2021. 130- Chemically modified copper potentiometric sensors based on curcumin and amino acid. Eman Yossri Frag, Gehad G. Mohamed, Marwa Saad. J. Iranian Chem Soc., 18, 651-660, 2021. 131- Potentiometric determination of Al(III) ion in polluted water and pharmaceutical samples by a novel mesoporous copper metal-organic framework modified carbon paste electrode. Nessma F. Mahmoud, Omar A. Fouad, Aya E. Ali, Gehad G. Mohamed. Industrial & Engineering Chemistry Research, 60(6), 2374-2387, 2021. 132- Superior Control for Physical Properties of Sputter Deposited ITO Thin-Films Proper for Some Transparent Solar Applications. Mohamed Fikry, Mohamed Mohie, Menna Gamal, Ahmed Ibrahim, Gehad G. Mohamed. Optical and Quantum Electronics, 53(2), 122 (1-16), 2021. 133- Synthesis, characterization, antimicrobial and MOE evaluation of nano 1,2,4-triazole based Schiff base ligand with some d-block metal ions. Nessma F. Mahmoud, Ashraf A. Abbas, Gehad G. Mohamed. Applied Organometallic Chemistry, 35:e6219, 1-14, 2021. 134- Studying of physicochemical properties of Coumarin based Nano-complexes for biomedical applications. Walaa H Mahmoud, Mervat Mostafa, M M Omar, Gehad G. Mohamed. Egyptian J. Chemistry, 64(6), 3019 - 3034, 2021. 135- Preparation, Characterization of Novel Cadmium-Based Metal-Organic Framework for Using as a Highly Selective and Sensitive Modified Carbon Paste Electrode in Determination of Cu(II) ion. Reem G. Deghadia, Ayman S. Eliwa, Aya E. Ali, Wafaa M. Hosny, Gehad G. Mohamed. Comments on Inorganic Chemistry, 41(4), 189-212, 2021. 136- Synthesis, Spectral, Thermal and Biological Studies of Some Transition and Inner Transition Schiff base Metal Complexes. Eman A.M. Khalil, Walaa H. Mahmoud, Maher M.I. El Dessouky, Gehad G. Mohamed. Egypt. J. Chem.,64(7), 3555-3571, 2021. 137- Potentiometric determination of mepivacaine hydrochloride local anethetic drug in pharmaceutical and biological fluids using ion selective electrode. Tamer Awad Ali, Gehad G. Mohamed, N.S. Abd El-Hamid. Egypt. J. Chem., 64(7), 3323-3334, 2021. 138- Synthesis, Characterization and Biological Activity of Transition Metals Schiff base Complexes Derived from 4,6-diacetylresorcinol and 1,8-naphthalenediamine. Walaa Hamed Mahmoud, M. M. Omar, Yasmin M. Ahmed, Gehad G Mohamed. Journal of Inorganic and Organometallic Polymers and Materials, 31, 2339–2359, 2021. 139- Gliclazide charge transfer complexes with some benzoquinone acceptors: Synthesis, structural characterization, thermal analyses, DFT studies, evaluation of anticancer activity and utility for determination of gliclazide in pure and dosage forms. Gehad G. Mohamed, Eman Y.Z. Frag, Rahenda H. Tamam. J. Mol. Structure, 134, 130351, , 2021. 140- Removal of Chromium (VI) from Aqueous Solutions Using Composite Nanofibers. Ahmed K. Suleiman, Omnia I. Ali, Elsayed M. Mahdi, Gehad G. Mohamed, Alaa Mohamed. Egypt. J. Chem., 64(1), 525-535, 2021. 141- Using Composite Nanofibers to Remove Microorganisms from Aqueous Solutions. Ahmed K. Suleiman, Omnia I. Ali, Elsayed M. Mahdi, Alaa Mohamed, Gehad G. Mohamed. Egypt. J. Chem., 64(1), 495-502, 2021. 142- Theoretical and Experimental Investigations of New Bis(amino triazole) Schiff Base Ligand: Preparation of Its UO2(II), Er(III) and La(III) Complexes, Studying of Their Antibacterial, Anticancer and Molecular Docking. Reem G. Deghadi, Ashraf A. Abbas, Gehad G. Mohamed. Applied Organometallic Chemistry, 35, e6292, 1-17, 2021. 143- Screen printed ion selective electrodes based on self-assembled thiol surfactant-gold-nanoparticles for determination of Cu(II) in different water samples Tamer Awad Ali, Ali A. Abd-Elaal, Gehad G. Mohamed. Microchemical Journal, 160, 105693, 1-12, 2021. 144- An Innovative sensor for the electrochemical determination of the new melatonergic antidepressant drug Agomelatine in tablets and biological fluids. Amany M. Fekry, Shereen M. Azab, Fekria M. Abou Attia, Neveen S. Ibrahim, Gehad G. Mohamed. Measurement, 186, 110160, 2021. 145- Preparation, Characterization and Biological Activity Screening on Some Metal Complexes Based of Schiff Base Ligand. Adel Elsonbati, Moustafa Amine Diab, S. Y. Abbas, Gehad G. Mohamed, Shimaa M. Morgan. Egypt. J. Chem., 64(8), 4125-4136, 2021. 146- Metal complexes of Tridentate Schiff base: Synthesis, Characterization, Biological Activity and Molecular Docking Studies with COVID-19 Protein Receptor. Gehad G. Mohamed, M.M. Omar, Yasmin M. Ahmed. Z. Anorg. Allg. Chem., 647(23-24), 2201–2218, 2021. 147- Hybrid Nanocomposite Based Graphene Sensor for Ultrasensitive Clomipramine HCl Detection Sally E. A. Elashery, Nour F. Attia, Gehad G. Mohamed, M. M. Omar, and Hager M. I. Tayea. Electroanalysis, 33, 1-12, 2021. 148. A sustainable cement mortar nano-sized admixture green synthesized from rice husk. Gehad G. Mohamed, Sameh H. Ismail, Khaled Abdelsamie. International Journal of Advanced Research in Engineering and Technology, 12(1), 994-1004, 2021. 149- Synthesis, Structural Characterization, DFT Calculations, and Antimicrobial, Anticancer, and Antimetastatic Properties of Nanosized Heteroleptic Complexes of Cocaine/TMEDA with d-Block Metal Ions. Abanoub Mosaad Abdallah, Nadia G. Zaki, Walaa H. Mahmoud, Ahmed M. El Kerdawy, Gehad G. Mohamed. Applied Organometallic Chemistry, 35:e6441, 1-19, 2021. 150- Promoted Visible-Light-Assisted Oxidation of Methanol over N-Doped TiO2/WO3 Nanostructures. Mai Mersal, Gehad G. Mohamed, Abdallah F. Zedan. Optical Materials, 122, part B, 111810, 2021. 151- Preparation, spectroscopic characterization and antitumor-antimicrobial studies of some Schiff base transition and inner transition mixed ligand complexes. Eman A.M. Khalil, Gehad G. Mohamed, J. Molecular Structure, 1249, 131612, 1-15, 2022. 152- Synthesis, spectroscopic, DFT and docking studies, Molecular structure of new Schiff base metal complexes. Ehab M. Zayed, Gehad G. Mohamed. Egypt. J. Chem., 65(1), 633-644, 2022. 153- Design and construction of electrochemical sensor for the determination of cerium(III) ions in petroleum water samples based on Schiff base-carbon nanotube as an ionophore. Tamer Awad Ali, Gehad G. Mohamed. RSC Advances, 12, 94-103, 2022. 154- Synthesis, theoretical study, molecular docking and biological activity of nano tridentate (E)-2-((3-hydoxyphenyl)methyl)phenol metal complexes A.Z. El-Sonbati, M.A. Diab, Sh.M. Morgan, S.Y. Abbas, Gehad G. Mohamed. Inorganic Chemistry Communications 137, 109193, 1-22, 2022. 155- Synthesis, Spectroscopic Characterization, Density Functional, Thermal Studies and Molecular Docking Simulation Of Rare Earth Element Complexes. Yasmin M. Ahmed, Gehad G. Mohamed. Applied Organometallic Chemistry, 36, e6476, 1-16, 2022. 156- Ultrasonic aided synthesis of a novel mesoporous cobalt-based metal-organic framework and its application in Cr(III) ion determination in centrum multivitamin and real water samples. Omar A. Fouad, Aya E. Ali, Gehad G. Mohamed, Nessma F. Mahmoud. Microchemical J, 175, 107228, 1-12, 2022. 157- Synthesis, Spectral Characterization, Antimicrobial Evaluation and Molecular docking studies on New Metal Complexes of Novel Schiff base derived from 4,6-dihydroxy-1,3-phenylene-diethanone. Yasmine M. Ahmed, Gehad G. Mohamed. J Mol Struc., 1256, 132496, 1-17, 2022. 1588- Structural characterization, spectroscopic studies, DFT and molecular docking studies on metal complexes of new hexadentate cyclic peptide ligand. Gaber Moustafa, E. Sabry, Ehab M. Zayed, Gehad G. Mohamed. Applied Organometallic Chemistry, 36(2), e6515, 1-17, 2022. 159- Synthesis, spectroscopic characterization, and thermal studies of novel Schiff base complexes. Theoretical simulation Studies on Coronavirus (COVID-19) using Molecular Docking. Yasmin M. Ahmed, M.M. Omar, Gehad G. Mohamed. Journal of The Iranian Chem Soc., 19(3), 901-919, 2022. 160- Antiureolytic activity of new water-soluble thiadiazole derivatives: Spectroscopic, DFT, and molecular docking studies. Zyad H. J. Al-Qaisi, Zahraa S. Al-Garawi, Ahmed Jasim M. Al-Karawi, Ali Jasim Hammood, Abanoub Mosaad Abdallah, William Clegg, Gehad G. Mohamed. Spectrochimica Acta Part A, 272(5), 120971, 1-17, 2022. 161- Harnessing Cu@Fe3O4 core shell nanostructure for biogas production from sewage sludge: Experimental study and microbial community shift. Gamal K. Hassan, Ahmed Abdel-Karim, Mona T. Al-Shemy, Patricia Rojas, Jose L. Sanz, Sameh H. Ismail, Gehad G. Mohamed, Fatma A. El-gohary, Aly Al-sayed. Renewable Energy, 188, 1059-1071, 2022. 162- Antibacterial and anticorrosion behavior of bioactivecomplexes of selected transition metal ions with new2-acetylpyridine Schiff base. Reem G. Deghadi, Ahmed E. Elsharkawy, Ashraf M. Ashmawy, Gehad G. Mohamed. Appl Organomet Chem., 36(4):e6579, 1-25, 2022. 163- Can one novel series of transition metal complexes of oxy-dianiline Schiff base afford advances in both biological inorganic chemistry and materials science?. Reem G. Deghadi, Ahmed E. Elsharkawy, Ashraf M. Ashmawy, Gehad G. Mohamed. Comments On Inorganic Chemistry, 42(1), 1-46, 2022. 164- Development of Ag-dendrites @Cu dendritic nanostructure for removal of selenium (IV) from aqueous solution. Shaimaa T. El-Wakeel, Ahmed Abdel-Karim, Sameh H. Ismail, Gehad G. Mohamed. Water Environ Res. 94:e10713, 1-9, 2022. 165- Coupling ATR-FTIR Spectroscopy and Chemometric Analysis for Rapid and Non-Destructive Ink Discrimination of Forensic Documents. Ahmed A. Gawad, Tarek M. Salama, M. Meshref, Gehad G. Mohamed and Abdallah F. Zedan. Egypt. J. Chem., 65(8), 167 – 179, 2022. 166- Chemical modified carbon paste electrode for potentiometric determination of Mo(VI) and its application in food analysis and agriculture fertilizers. Safaa Said, A.A Abass, Gehad G. Mohamed. Electroanalysis, 34, 872 –882, 2022. 167- Bioactive La(III), Er(III), Yb(III), Ru(III) and Ta(V) Complexes of New Organometallic Schiff Base: Preparation, Structural Characterization, Antibacterial, Anticancer activities and MOE Studies. Reem G. Deghadi, Gehad G. Mohamed, Nessma F. Mahmoud. Applied Organometallic Chemistry, 36(6), e6675, 1-17, 2022. 168- Synthesis, Spectroscopic, Structural and Molecular Docking Studies of Some New Nano-Sized Ferrocene-Based Imine Chelates as Antimicrobial and Anticancer Agents. Mai M. Khalaf, Hany M. Abd El-Lateef, Abdulrahman Alhadhrami, Fatma N. Sayed, Gehad G. Mohamed, Mohamed Gouda, Saad Shaaban and Ahmed M. Abu-Dief. Materials, 15, 3678, 1-19, 2022. 199- Antimicrobial and bioinformatic modelling studies of isatin mixed ligand and some ternary chelates. G.G. Mohamed, Samir A. Ali, Hanan F. Abd El-Halim. ChemistrySelect, 7(21), e202200602 (1 of 12), 2022. 170- Spectroscopic investigation, thermal, molecular structure, antimicrobial and anticancer activity with modelling studies of some metal complexes derived from isatin Schiff base ligand. Gehad G. Mohamed, Mohamed M. A. Omar, Bassant S. Moustafa, Hanan F. AbdEl-Halim, Nahla A. Farag. Inorganic Chemistry Communications, 141, 109606, 2022. 171- Preparation and characterization of metformin-loaded chitosan nanoparticles for biomedical applications. Ashraf Elkomy, Mokhtar M. El-Zawahri, Aziza M.M. Amer, Mohamed Aboubakr, Mohamed Abdel Hakeem, Sameh H. Ismail, Gehad G. Mohamed, Aya M. Salem. Benha Veterinary Medical Journal, 42(1), 33-38, 2022. 172- Biochemical and histopathological evaluation of the effect of metformin and metformin nanoparticles against alloxan-induced diabetes in rats. Ashraf Elkomy, Mokhtar M. El-Zawahri, Aziza M. M. Amer, Mohamed Aboubakr, Mohamed Abdel Hakeem, Gehad G. Mohamed, Aya M. Salem. Benha Veterinary Medical Journal, 42(1), 39-45, 2022. 173- Development of Chromium(III) Selective Potentiometric Sensors for its Determination in Petroleum Water Samples Using Synthesized Nano Schiff Base Complex as an Ionophore. Tamer Awad Ali, Gehad G. Mohamed. Journal of AOAC International, 105(3), 727-738, 2022. 174- The antibacterial effect of silver, zinc-oxide and combination of silver/ zinc oxide nanoparticles coating of orthodontic brackets. Noha K. Zeidan, Nagwa M. Enany, Gehad Genidy Mohamed and Eiman S. Marzouk. BMC Oral Health, 22:230, 1-14, 2022. 175- Design, structural inspection and bio-medicinal applications of some novel nano imine metal complexes based on acetylferrocene. Mai M. Khalaf, Hany M. Abd El-Lateef, Mohamed Gouda, Fatma N. Sayed, Gehad G Mohamed, Ahmed M. Abu-Dief. Materials, 15, 4842, 1-19, 2022. 176- Synthesis and characterization of Schiff base ligand as a carrier and its application for construction of new Mn(II) sensors and their use in petroleum water samples. Tamer Awad Ali, Gehad G. Mohamed. Egyp. J. Petroleum, 31, 47-54, 2022. 177- Evaluation of the wound healing effect of neomycin-silver nano-composite gel in rats. Ahmed Hossni El Banna, Fady Sayed Youssef, Hisham Youssef Elzorba, Ahmed M. Soliman, Gehad Genidy Mohamed, Sameh Hamed Ismail, Mohamed Refaat Mousa, Hossny Awad Elbanna and Afaf Sayed Osman. International Journal of Immunopathology and Pharmacology, 36, 1–12, 2022. 178- Newly synthesized lanthanides complexes of ferrocene-based Schiff base with high biological activities and improved molecular docking data. Fatma N. Sayed, Gehad G Mohamed. Journal of Organometallic Chemistry, 977. 122450, 2022. 179- New Tin(IV) Schiff base complexes: synthesis, characterization and antibacterial investigation, docking and theoretical studies. Yasmin M. Ahmed, Gehad G. Mohamed. Inorganic Chemistry Communications, 144, 109864, 2022. 180- Structural, optical, dielectric, and surface properties of polyimide hybrid nanocomposites flms embedded mesoporous silica nanoparticles synthesized from rice husk ash for optoelectronic applications. A. A. Ebnalwaled, Ahmed H. Sadek, Sameh H. Ismail, Gehad G. Mohamed. Optical and Quantum Electronics, 54, 690, 1-31, 2022. 181- Strong-base free synthesis enhancing the structural, magnetic and optical properties of Mn/Co and Zn/Co substituted cobalt ferrites. Hala G. Abd-Elbaky, M. Rasly, Reem G. Deghadi, Gehad G. Mohamed, M. M. Rashad. Journal of Materials Research and Technology, 20, 905-915, 2022. 182- Electroanalytical determination of Al(III) ion in petroleum water samples using symmetric 1,3-diamine based Schiff base as a carrier. Tamer Awad Ali, Samy B. Elhenawy, Gehad G. Mohamed. J Iranina Chem. Soc., 19(8), 3549-3560, 2022. 183- Synthesis, characterization, and investigation of the anticoccidial activity of new formulation curcumin-olive oil nano-composite. Reem Ramadan, Fady Yousef, Gehad G. Mohamed, Sameh H. Ismail, Mohamed El-Bahy, Shimaa Abdel-Radi. Advances in Animal and Veterinary Sciences, 10(10), 2186-2196, 2022. 184- Can new series of half-sandwich lanthanum(III), erbium(III) and ytterbium(III) complexes of organometallic ferrocenyl Schiff base ligands display biological activities as antibacterial and anticancer drugs?. Reem G. Deghadi, Gehad G. Mohamed. Comments On Inorganic Chemistry, 42(6), 368-401, 2022. 185- Synthesis, characterization, biological application, molecular docking, molecular structure, spectroscopic studies of some transition metal complexes of isophthalamide ligand. Hayam A. Abd El Salam, Gehad G. Mohamed, Ehab M. Zayed. Molecular Structure, 1273, 134231, 2022. 186- Highly efficient elimination of Pb2+ and Al3+ metal ions from waste water using graphene oxide/3,5-diaminobenzoic acid composite: selective removal of Pb2+ from real industrial wastewater. Ahmed A. Farag, Aboubakr Gafar. Afifi, Said A. Salih, Eslam A. Mohamed, Gehad G. Mohamed. AOC Omega, 7(43), 38347-38360, 2022. 187- Effect of type of organic modifier on the clay layered-based nanocomposites flammability and toxic gases emission. Nour Fathi Attia, M. Nour, M. Hassan, G. Mohamed, H. Oh, Manar Mahmoud. Journal of Thermoplastic Composite Materials, 35(10), 1488-1509, 2022. 188- Behavior of silica nanoparticles synthesized from rice husk ash by the sol-gel method as a photocatalytic and antibacterial agent. A. Alhadhrami, Gehad G. Mohamed, Ahmed H. Sadek, Sameh H. Ismail, A. A. Ebnalwaled and Abdulraheem S. A. Almalki. Materials, 15, 2811, 1-25, 2022. 189- Synthesis and surface characterization of a chemically modified carbon paste electrode and its application in determination of Hg(II) ion in water, food and dental amalgam samples Aya E. Ali, Ashraf A. Abbas, Gehad G. Mohamed. Microchemical J., 184, 108178, 1-8, 2023. 190. Synthesis, structural characterization and in vitro antibacterial activity studies of ternary metal complexes of anti-inflammatory bromhexine drug. Nessma F. Mahmoud, Norhan R.S. Omar, Gehad G. Mohamed, Fatma N. Sayed. Inorganic Chemistry Communication, 147, 110216, 1-16, 2023.

1- Spectrophotometric microdetermination of p-acetamidophenol in some Egyptian pharmaceutical preparations. F.A. Nour El-Dien and G.G. Mohamed; 4th International conference on new trends in chemistry, Cairo, January, 4-7, 1997. 2- The kinetics and thermochemistry of some redox reactions. G.G. Mohamed, F.A. Nour El-Dien and M.A. Zayed, 1st International conference on the role of chemistry administration for attending environmental and society, Cairo, December, 15-17, 1998. 3- Improvement of bromimetric titration. Determination of paracetamol bromopotentiometrically using (a) silver amalgam and (b) bromide ion-selective electrodes. F.A. Nour El-Dien, M.A. Zayed and G.G. Mohamed, 15th International conference on chemical education; chemistry and global environmental changes (IUPAC), Cairo, August, 9-14, 1998. 4- Structural study on bromine-cetamol redox propducts through correlation between thermal and mass spectral analyses. F.A. Nour El-Dien, M.A. Zayed and G.G. Mohamed; 2nd Euro-Mediterranean conference on application of photobiology and laser technologies in medicine and environment, Cairo, February, 13-16, 1998. 5- Spectral and thermal studies of thiobarbituric acid complexes. Zenat M. Zaki and G.G. Mohamed; 1st International conference on new trends of chemistry and its applications (BNS. Chem. 1), Cairo University, Beni-Suef Branch, Beni-Suef, December, 12-16, 1999. 6- Spectrophotometric determination of famotidin and cimitidine in pharmaceutical preparations using potassium periodate. G.G. Mohamed and Shaban M. Khalil, Biannual conference on chemistry (Chem. 1), Cairo University, Cairo, March, 6-9, 2000. 7- Synthesis and multinuclear resonance study of dimethyltin(IV) complexes with some imidazoles. Wafaa M. Hosny and G.G. Mohamed; Biannual conference on chemistry (Chem. 1), Cairo University, Cairo, March, 6-9, 2000. 8- New binary and ternary complexes of fluclaxocillin and amino acids with some transition metals. Synthesis, characterization and cyclic voltammetric studies. G.G. Mohamed and Wafaa M. Hosny and M. A. Abd El-Rehim; Biannual conference on chemistry (Chem. 2), Cairo University, Cairo, March, 4-7, 2002. 9- Studies on some salicylidine-2-aminobenzimidazole schiff base complexes of FeIII, CoII, NiII, CuII, ZnII and CdII. G.G. Mohamed and Z.H. Abd El-Wahab; Biannual conference on chemistry (Chem. 2), Cairo University, Cairo, March, 4-7, 2002. 10- Structural and non-isothermal study of the ternary complexes of copper with salycilidene-2-aminothiophenol and amino acids. A.A. Soliman, G.G. Mohamed, W. Linert. 2nd International conference on Chemistry and its application. December, 6-9, 2003, Doha, Qatar. 11- Mixed ligand complexes of Cu(II) involving sulfasalazine as primary ligand and amino acids as secondary ligands. Ahmed A. Soliman, M. Khatab and Gehad. G. Mohamed, Third annual conference on chemistry (Chem. 3), Cairo University, Cairo, March, 1-4, 2004. 12- Determination of dopamine hydrochloride in pharmaceutical forms using two spectrophotometric procedures. F.A. Nour El-Dien, Gehad G. Mohamed, Reham G. El-Nahas, Biannual conference on chemistry (Chem. 3), Cairo University, Cairo, March, 1-4, 2004. 13- Metal complexes of Schiff bases. Preparation, characterization and biological activity. Gehad G. Mohamed, M.M. Omar and Ahmed M.M. Hindy. Biannual conference on chemistry (Chem. 4), Cairo University, Cairo, March, 5-8, 2006. 14- Quantitative determination of dopamine in pharmaceutical preparations and biological samples of Schizophrenic patients. Faten A. Nour El-Dien, Gehad G. Mohamed, Reham G. El-Nahas. Biannual conference on chemistry (Chem. 4), Cairo University, Cairo, March, 5-8, 2006. 15- Spectrophotometric determination of flucloxacillin and dicloxacillin in pure and dosage forms. F.A. Nour El-Din, Gehad G..Mohamed, and Eman Y.Z.A. Farag. 7th International symposium on new trends in chemsitry "Analytical chemistry for a better life", Cairo University, Cairo, January, 21-24, 2006. 16- Quantitative determination of dopamine hydrochloride and levodopa in pharmaceutical forms using simplified spectrophotometric method. F.A. Nour El-Dien, Gehad G. Mohamed, Reham G. El-Nahas. 7th International symposium on new trends in chemsitry "Analytical chemistry for a better life", Cairo University, Cairo, January, 21-24, 2006. 17- Quantitative determination of dopamine in pharmaceutical preparations and biological samples of schizophrenic patients. F.A. Nour El-Dien, Gehad G. Mohamed, Reham G. El-Nahas, Ahmed G. El-Nahas. Biannual conference on chemistry (Chem. 4), Cairo University, Cairo, March, 5-8, 2006. 18- Metal Complexes of Schiff Base derived from sulfametrole and vanillin. Synthesis, spectral, thermal characterization and biological activity. Gehad G. Mohamed, C.M. Sharaby. 9th International conference on chemistry and its role in development, Chemistry Department, Mansoura University, April 16-19, 2007. 19- Utility of 7,7,8,8-tetracyanoquinodimethane reagent for the spectrophotometric determination of trazodone, amineptine and amitriptyline hydrochlorides in pure form and tablets. Gehad G. Mohamed, Faten A.F. Nour-El-Dien, Nehad A. Mohamed. 9th International conference on chemistry and its role in development, Chemistry Department, Mansoura University, April 16-19, 2007. 20- Heat capacity as a new indicator for compost quality. S.Y. Awadallah, F.A. Nour El-Dien, Gehad. G. Mohamed and Amal. A. Ahmed. 8th National conference on soils and water studies in sustainable agriculture systems, Egyptain Soil Science Society (ESSS), Egyptian International Center for Agriculture, Dokki, Cairo, November 25-26, 2007. 21- Extractive spectrophotometirc determination of sulphonamide drugs through ion–pair formation with molybdenum and thiocyanate in acidic medium. International conference on Chemistry "Green and sustainable chemistry for developing countries", Cairo University, 3-6 March, 2008. 22- Metal Complexes of new Schiff base derived from o-phthaldehyde and 2-aminobenzoic acid. Synthesis, spectral, thermal characterization and biological activity. International conference on Chemistry "Green and sustainable chemistry for developing countries", Cairo University, 3-6 March, 2008. 23- Synthesis of heterocyclic carbene ligands via 1,2,3-diheterocyclization of allenylidene complexes with dinucleophiles. International conference on Chemistry "Green and sustainable chemistry for developing countries", Cairo University, 3-6 March, 2008. 24- Mass spectroscopy, thermal analysis and semi-empirical molecular orbial calculations studies on repaglinide, flubendazole, robinidine hydrochloride and danofloxacin drugs. The fifth Saudi Technical Conference and Exhibition, TVTC, Saudi Arabia, January, 2009. 25- Disposal Screen-Printed Carbon Paste Electrodes for the Potentiometric Titration of Surfactants. The International Conference For Nanotechnology Industries, King Saud University, Riyadh – Saudi Arabia, King Abdullah Institute for Nanotechnology, The Leading Technology of 21st Century, April, 5-7, 2009. 26- Monitoring of pesticide residues in different agriculture fields. Effect of different home processes on the pesticides elimination. The International Conference For Nanotechnology Industries, King Saud University, Riyadh – Saudi Arabia, King Abdullah Institute for Nanotechnology, The Leading Technology of 21st Century, April, 5-7, 2009. 27- Screen-printed carbon paste electrodes for the potentiometric titration of cetylpyridinium bromide in different samples, Tamer Awad ali, Gehad G. Mohamed, The International Conference For Nanotechnology Industries, King Saud University, Riyadh – Saudi Arabia, King Abdullah Institute for Nanotechnology, The Leading Technology of 21st Century, April, 5-7, 2009. 28- Towards a disposal sensors for drug quality control: Dextromethorphan screen-printed Electrode. Hassan N.A. Hassan, Elmorsy Khaled, Gehad G. Mohamed and Ali-Eldin A. Selim. Taibah International Chemistry Conference, Saudi Arabia, April, 5-7, 2010. 29- Towards Disposal Sensors for Drug Quality Control: Dextromethorphan Screen-Printed Electrode. Hassan.N.A.Hassan, Elmorsy Khaled, Gehad G. Mohamed and Ali-Eldin A. Selim. The 8th Saudi International Pharmaceutical Conference and Exhibition. Saudi Arabia, Riyadh, 26-28 April, 2010. 30- Charge transfer complexes of chlorothiazide with iodine, picric acid and chloanlic acid. Gehad G. Mohamed, Moamen S. Refat And Asmaa A. Ibrahim. Fourth Saudi Science Conference, Saudi Arabia, March 21-24th, 2010. 31- Towards A Disposable Sensor For Drug Quality Control: Acetylcholine Screen Printed Electrode. Fourth Saudi Science Conference, Saudi Arabia, March 21-24th, 2010. 32- Potentiometric determination of orphenadrine citrate using carbon paste and PVC membrane electrodes. The Fourth International Chemistry Conference, Riyadh- Kingdom of Saudi Arabia, 19-21, November 2011, 23-25 Thu Elhejah 1342 H, Chemistry Department, Faculty Science – King Saud University. 33- Simple validated method for determination of deoxynivalenol and zearalenone in some cereals using high performance liquid chromatography. Ahmed sebaei, A, Gehad G. Mohamed, F.A. Nour El-Dien. The Egyptian Conference Celebrating International year of Chemistry: IYC 2011 "Chemistry and Development", Cairo University, 23-25 October 2011. 34- A novel clomipramine and paroxetine-selective membrane sensors and their applications in pharmaceutical analysis. H.M. Elqudaby, E.Y.Z. Frag, Gehad G. Mohamed, M. Abd El-Razek. Ehyptian Pharmaceutical Society, XXXII Conference of Pharmaceutical Sciences, December 2011. 35- Extractive spectrophotometric method for determination of meoxipril HCl and perindopril in raw materials and tablets using ion pair formation. H.M. Elqudaby, F.A. Nour El-dein, E.Y. Frag, N.M. Kamal El-Dien, G.G. Mohamed. 3rd International scientific Conference of Faculty of Pharmacy, Cairo University “Good Pharmacy Practice”, April, 25-26, 2012. 36- Electrometric assay for the determination of moexipril HCl using sensitive sensors based on carbon paste and pvc membrane. Hoda M. Elqudaby, Faten A. Nour El-Dien, Eman Y.Z. Farg, Noha M. Kamal El-Dien and Gehad G. Mohamed. 5th International conference on Natural Toxins, cairo, Egypt, 17-19 December 2012. 37- Purification of sodium diuranate produced from gabal gattar (gii) mineralization using tri butyl phosphate. K. F. Mahmoud, Gehad Genidy Mohamed, W. M. Morsi. 11TH Arab Conference on the Peaceful Uses of Atomic Energy, Khartoum, Sudan, 16-20 December 2012. 38- New Fe(III)-screen printed ion selective electrode for potentiometric determination of iron in water samples, Tamer Awad Ali, Gehad G. Mohamed, A.M. Al-Sabagh, The 16th International Conference on Petroleum, Mineral Resources and Development in Egyptian Petroleum Research Institute, Cairo, Egypt on 10-12 Feb., 2013. 39- Thiol surfactant assembled gold nano particle ion exchanger for screen-printed electrode fabrication. Potentiometric determination of Ce(III) in environmental polluted samples, Gehad G. Mohamed, Tamer Awad Ali, 44th World Chemistry Congress, Istanbul, Turkish on 11 - 16 August, 2013. 40- New Fe(III)-screen printed ion selective electrode for potentiometric determination of iron in water samples. Tamer Awad Ali, Gehad Genidy mohamed, A.AM. Al-Sabagh. The 16th International Conference on Petroleum Mineral Resources and Development, 10-12 February, 2014. 41- Chemical, Synthesis and Characterization of Nano Crystalline Zirconium Oxide. 5th International Conference on Advances in Chemistry and Applied Chemistry (ICACAC-5), National Research Center, October 21-23/2014, Dokki, Giza, Egypt. 42- Biological activity, spectral and thermal characterization of mixed ligand complexes of enrofloxacin and glycine.In vitro antibacterial and antifungal activity studies. Madiha H. Solima. Gehad G. Mohamed, Ahmed M.M. Hindy. 5th International Conference on Advances in Chemistry and Applied Chemistry (ICACAC-5), National Research Center, October 21-23/2014, Dokki, Giza, Egypt. 43- Novel fabrication for the determination of nanomolar concentrations of Fe(III) in formation water samples. T.A. Ali, G.G. Mohamed. The 18th International Conference on Petroleum, Mineral Resources and Development, 8-10/2/2015. 44- Potentiometric determination of La(III) in polluted water samples using modified screen printed electrode by s self assembeled mercapto compound on silver nanoparticles. T.A. Ali, G.G. Mohamed. The 18th International Conference on Petroleum, Mineral Resources and Development, 8-10/2/2015. 45- Construction and performance characterization of chemically modified carbon paste electrodes for the selective determination of Co(II) ions in waste water samples. T.A. Ali, G.G. Mohamed, M.M. Omar, N.M. Hanafy. The 18th International Conference on Petroleum, Mineral Resources and Development, 8-10/2/2015. 46- Construction and performance characterization of modified screen and modified carbon paste sensors for the selective determination of Cu(II) ion in polluted water samples. T.A. Ali, G.G. Mohamed, H.R. Ali, A.H. Said. The 18th International Conference on Petroleum, Mineral Resources and Development, 8-10/2/2015. 47- Novel surfactant selective electrochemical sensors based on -cyclodextrine and 1,4-bis(8-bromohexyloxy)benzene in different water samples. T.A. Ali, G.G. Mohamed, M.M.I. El-Dessouky, A.A.E. Hassan. The 18th International Conference on Petroleum, Mineral Resources and Development, 8-10/2/2015. 48- Spectrophotometric detrmination of diazepam via charge transfer complex formation reaction. Gehad G. Mohamed, Eman Y.Z. Frag, M.A. Zayed, M.M. Omar, Sally E.A. Elashery. 13th Ibn Sina International Conference on Pure and Applied Heterocylic Chemistry, 14-17 February, Hurghada, Egypt, 2015. 49- Spectrophotometric determination of pseudoephedrine hydrochloride in pure and in pharmaceutical forms with some dyestuff reagents. Eman Y.Z. Frag, Gehad G. Mohamed, S. Nagah, maher M.I. El-dessouky. 13th Ibn Sina International Conference on Pure and Applied Heterocylic Chemistry, 14-17 February, Hurghada, Egypt, 2015. 50- Synthesis, spectral, thermal and biological activity studies on guaifenesin metal complexes. Walaa H. Mahmoud, Nessma F. Mahmoud, Gehad G. Mohamed. 13th Ibn Sina International Conference on Pure and Applied Heterocylic Chemistry, 14-17 February, Hurghada, Egypt. 51- Study of electrochemical behaviour of nalbuphine hydrochloride using pencil and aactivated glassy carbon electrodes. Hassan A. Hindawy, H.M. Elqudaby, Gehad G. Mohamed, Eglal R. Souaya, Ghada M. G. Eldin. Third FUE International Conference of Pharmaceutical Sciences, 9-11 February, 2015, International City Star, Cairo, Egypt. 52- Mixed-ligand complex formation of tenoxicam drug with some transition metal ions in presence of valine: Synthesis, characterization and evaluation of the humeral immune response of calves. Gehad G. Mohamed, Ahmed A. El-Sherif, Mohamed A. Saad, Sara E.A. El-Sawy. The 5th International Environmental Conference on Sustainable Development and Environment at Damietta University, from 31 March to 2 April, 2015. 53- Spectroscopic, thermal, anticancer and antimicrobial activities of metal chelates of novel 4-aminoantipyrine Schiff base ligand. Walaa H. Mahmoud, Reem M. El-Degheidy, Gehad G. Mohamed. 1st International Conference on Multidisciplinary Research, 28-31 October, Porto Sokhna, Ain Sokhna, Egypt, 2015. 54- Coordination modes of novel bidentate azo dye with some transition metal ions. Synthesis, characterization and in vitro antimicrobial and antibreastic cancer activity studies. Walaa H. Mahmoud, Fatma N. Sayed, M.M. Omar, Gehad G. Mohamed. 1st International Conference on Multidisciplinary Research, 28-31 October, Porto Sokhna, Ain Sokhna, Egypt, 2015. 55- Spectrophotometric determination of melatonin using the detection system of potassium ferricyanide–Fe(III) in pure form and in pharmaceutical samples. Gehad G. Mohamed, Marwa El-Badry Mohamed, Abanoub M. Abdallah. 1st International Conference on Multidisciplinary Research, 28-31 October, Porto Sokhna, Ain Sokhna, Egypt, 2015. 56- Using of alternative green coagulant in the treatment of water resources different micro-pollutants. Mahmoud Abd Al Rahman, Eglal R. Souaya, Gehad G. Mohamed. 1st International Conference on Multidisciplinary Research, 28-31 October, Porto Sokhna, Ain Sokhna, Egypt, 2015. 57- Removal of environmental pollutants from ground water samples using dried slurry. M.M. Omar. Ahmed G. Yehia, Gehad G. Mohamed. 1st International Conference on Multidisciplinary Research, 28-31 October, Porto Sokhna, Ain Sokhna, Egypt, 2015. 58- Using of alternative green coagulant in the treatment of water resources different micro-pollutants. Mahmoud Abd Al Rahman, Eglal R. Souaya, Gehad G. Mohamed. IEREK`s International Conference on Improving Sustainability Concept in Developing Countries, 5-7 December, Cairo, Egypt, 2015. 59- Development and validation of s stability indicating RP-HPLC for determination of sofosbuvir in bulk and pharmaceutical dosage forms. Ali A. aglan, Gehad G. Mohamed, Tamer A. Ali, Fakiha El-Taib Heakal. Egyptian Third International Conference in Chemistry “Chemistry and Sustainable Development”, 16-19 November, Hurghada, Egypt, 2015. 60- Metal complexes of new azo ligand derived from m-phenylene diamine and p-aminobenzoic acid. Preparation, spectroscopic and antimicrobial studies. Walaa H. Mahmoud, Ahmed M. Refaat, Gehad G. Mohamed. Egyptian Third International Conference in Chemistry “Chemistry and Sustainable Development”, 16-19 November, Hurghada, Egypt, 2015. 61- Spectral investigation and in vitro antibacterial evaluation of some transition metal complexes of Schiff base derived from dibenzoyl methane and 2,6-diaminopyridine. Walaa H. Mahmoud, Gehad G. Mohamed, Ahmed A. Sedik. Egyptian Third International Conference in Chemistry “Chemistry and Sustainable Development”, 16-19 November, Hurghada, Egypt, 2015. 62- Characterization, thermal, antimacrobial study on metal complexes based on Sudan III azodye ligand. Walaa H. Mahmoud, Sabreen Y. Abbas, Gehad G. Mohamed. Egyptian Third International Conference in Chemistry “Chemistry and Sustainable Development”, 16-19 November, Hurghada, Egypt, 2015. 63- Fabrication of chemically and in situ modified carbon paste electrode for poteniometric determination of chlorpromazine HCl in pure, pharmaceutical preparations, urine and serum, Gehad G. Mohamed, Eman Y.Z. Frag, M.A. Zayed, M.M. Omar, Sally E.A. Elashery, International Conference on Nanomaterials and Nanotechnology, India, 7-10 December, 2015. 64- Characterization of coordination compounds of some transition metal ions with Schiff base ligand derived from dibenzoyl methane. Walaa H. Mahmoud, Omnya Y. El-sayed, Gehad G. Mohamed. International Conference on Chemical Science and applications, 6-9 August, Alexandria, Egypt, 2016. 65- Improvement of flammability and toxicity properties of LLDPE by incorporation of nano clay modified with new silane compounds. M.A. Hassan, M.A. Nour, G.G. Mohamed, Manar M. Mahmoud. International conference in nanotechnology, biotechnology and spectroscopy, tools for success in the coming era, ICNBS Egypt, 4-6 March, 2016. 66- Preparation and spectroscopic characterization of novel Schiff base metal complexes. Thermal, molecular structure, antimicrobial and anticancer activity. W.H. Mahmoud, G.G. Mohamed, K.M. Kamal El-Deen. 13th International conference on chemistry and its role in development, Mansoura University, Sharm El-Sheikh, 20-24 March, 2017. 67- Antimicrobial and anticancer studies of schiff base ligand and its transition metals mixed ligand complexes with heterocyclic base. H.F. Abd El-halim, G.G. Mohamed, M.M. Pmar, M.N. Anwar. 13th International conference on chemistry and its role in development, Mansoura University, Sharm El-Sheikh, 20-24 March, 2017. 68- Synthesis, spectral, thermal and biological studies of new Schiff base ligand and its mixed ligand complexes. H.F. Abd El-halim, G.G. Mohamed, M.M. Omar, E.A.M. Khalil. 13th International conference on chemistry and its role in development, Mansoura University, Sharm El-Sheikh, 20-24 March, 2017. 69- Potentiometric determination of terbinafine hydrochloride antifungal drug in pharmaceutical and biological fluids using ion selective electrodes. H. Eldessouky, G.G. Mohamed, T.A. Ali, S.M. Abdelsabour, Y. Salah Eldin Elsayed. 13th International conference on chemistry and its role in development, Mansoura University, Sharm El-Sheikh, 20-24 March, 2017. 70- Drinking water quality remediation using a novel oxidizing material. E.R. Souaya, Gehad Genidy Mohamed, Amr Ali Mohamed, M.A.S. Mehany, Ahmed G. Yehia. Twentieth International Water Technology Conference, IWTC20, Hurghada, 18-20 May 2017. 71- Effect of dispersion of different organoclays on the mechanical and thermal properties of SBR-NBR blend composites. Nour F. Attia, Gehad G. Mohamed, Taha Abdu. International Conference of Nanotechnology, Biotechnology and Spectroscopy, Tools of success in the coming era, ICNBS Egypt, 24-26 March, Grand Pyramids Hotel, Giza, Egypt, 2017. 72- Synthesis and characterization of transition metal complexes of biologically active Schiff base ligand. Walaa H. Mahmoud, M.M. Omar, Gehad G. Mohamed, Aml M. Anwer, Bassant S. Moustafa. 2nd International Conference on Chemical and Pharmaceutical Sciences Applications (ICCPSA-2017), Sharm El-Sheikh, Egypt, 8-11 August, 2017. 73- Preparation and characterization of novel azo ligand and its metal complexes. Antimicrobial and anticancer activity studies. Walaa H. Mahmoud, Gehad G. Mohamed, Mohamed Shawky. 2nd International Conference on Chemical and Pharmaceutical Sciences Applications (ICCPSA-2017), Sharm El-Sheikh, Egypt, 8-11 August, 2017. 74- Potentiometric determination of tetrabutylammonium bromide using in situ screen printed and carbon paste ion selective electrodes. Eman Y.Z. Frag, Sally E.A. Elashery, Mohamed G. E. Mosa, Gehad G. Mohamed. 2nd International Conference on Applied Chemistry (ICAC-2), Hurghada, Egypt, November 25-28, 2017. 75- Electroanalytical determination of donepezil hydrochloride in its formulations using in situ screen printed and carbon paste ion selective electrodes. Sally E.A. Elashery, M.M. Omar, Enas A.A. Abdelkhalek, Gehad G. Mohamed. International Conference on Applied Chemistry (ICAC-2), Hurghada, Egypt, November 25-28, 2017. 76- Multi walled carbon nanotubes and graphene based modified carbon paste electrodes used for determination of alfuzosin hydrochloride in pure, pharmaceutical and biological fluid samples. Eman Y.Z. Frag, Marwa E. Mohamed*, Yasmin M.G. Ahmed, Gehad G. Mohamed. International Conference on Applied Chemistry (ICAC-2), Hurghada, Egypt, November 25-28, 2017. 77- "Potentiometric determination of anticholinergic drugs in pharmaceutical formulations, Surface analysis using SEM and EDX. Marwa E. Mohamed, Sally E.A. Elashery, Eman Y.Z. Frag, Maysa R. Mostafa, Gehad G. Mohamed. International Conference on Applied Chemistry (ICAC-2), Hurghada, Egypt, November 25-28, 2017.

- Teaching practical coarses for the undergraduate students (1st, 2nd and 3rd years since 1990-till now) and graduate students (Diploma). - Teaching coarses of Analytical Chemistry (Chem 221), Instrumental methods of analysis (Chem 321) and general inorganic chemistry (Predental students), Transition metal chemistry (Chem 332, 331 and 333), Organometallics (Chem 431), Chemistry of s- and p-block elements (Chem 232), Bioinorganic chemistry (Chem 432), Inorganic Reaction Mechanism (Chem 433) (1996-till now). NAN 507: Nanomaterials for Environment applications NAN 510: Membrane Science for filtration and separation applications