lobna.nassr

Lobna Abdel-Mohsen Ebaid Nassr

Professor - Head Of Chemistry Department- Director of Quality Management Unit - Faculty of Science - Sohag University

Faculty of science

Address: Chemistry Department - Faculty of Science - Sohag University

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Publications Which contain the keyword: amino acid


2020-07-15 14:55:37 Keywords amino acid, peptide, Cyclopept,
Design, Synthesis of Novel Cyclic Pentapeptide Derivatives Based on 1,2-Benzenedicarbonyl Chloride with Expected Anticancer Activity
Linear pentapeptide ester, phthaloyl-bis-[glycylglycine]-OMe, 3, have been prepared via coupling of N-phthalic acid or dichloride with glycylglycine ester, which was hydrolyzed to the corresponding acid, phthaloyl-bis-[glycylglycine], 4. Cyclization of tetrapeptide acids to give cyclic pentapeptide esters, acids and hydrazides. A preliminary cytotoxicity evaluation (National Cancer Institute, Cairo, EGYPT), for a representative example, Cyclo-(phthaloyl)-)-bis-[glycylglycine]-L-Lys-OMe (phthaloyl cyclic pentapeptide methyl ester) 5, against ... Read more

Synthesis, Characterization, DNA Binding Studies and Embryos toxicity of Some Novel  Iron(II)  Amino Acid  Schiff base  complexes
New Fe(II) Schiff base amino acid complexes derived from the condensation of o-hydroxynaphthaldehyde with L-alanine, L-phenylalanine, L-aspartic acid, L-histidine and L-arginine were synthesized and characterized by elemental analysis, IR, electronic spectra, and conductance measurements. The stoichiometry and the stability constants of the complexes were determined spectrophotometrically. The investigated Schiff bases exhibited tridentate coordination mode with the general formulae [Fe(HL)2]·nH2O. But ... Read more

2018-11-27 23:36:44 Keywords hydroxybenzaldhyde, amino acid, Cu(II) Schiff bases,
Tailoring, physicochemical characterization, antibacterial and DNA binding mode studies of  Cu(II) Schiff bases amino acid bioactive agents incorporating 5- bromo-2-hydroxybenzaldhyde
Five novel Cu(II) complexes derived from the condensation between 5-bromosalicylaldehyde (bs) and α-amino acids (L-alanine, L-phenylalanine, L-aspartic acid, L-histidine and L-arginine) were synthesized and characterized by their elemental analyses, thermogravimetric analysis, IR, mass and electronic spectra, conductance and magnetic measurements. Moreover, the stoichiometry and the stability constants of the prepared complexes have been determined spectrophotometrically using continuous variation and molar ... Read more

2018-10-20 17:11:06 Keywords amino acid, fatty acid profile, wild plants,
Abdou Bouba Armand, Ponka Roger, Njintang Yanou Nicolas, Abul-Hamd El-Sayed Mehanni, Didier Montet, Joël Scher1 and Mbofung Carl Moses. Amino acid and fatty acid profile of twenty wild plants used as spices in Cameroon.
* Abdou Bouba Armand, Ponka Roger, Njintang Yanou Nicolas, ABUL-HAMD EL-SAYED MEHANNI, Didier Montet, Joël Scher1 and Mbofung Carl Moses. Amino acid and fatty acid profile of twenty wild plants used as spices in Cameroon. American Journal of Food Science and Technology, 2016, Vol. 4, No. 2, 29-37 Read more

2018-10-20 16:59:21 Keywords amino acid, fatty acid profile, wild plants,
8)	Abdou Bouba Armand, Ponka Roger, Njintang Yanou Nicolas, Abul-Hamd El-Sayed Mehanni, Didier Montet, Joël Scher1 and Mbofung Carl Moses. Amino acid and fatty acid profile of twenty wild plants used as spices in Cameroon.
* Abdou Bouba Armand, Ponka Roger, Njintang Yanou Nicolas, ABUL-HAMD EL-SAYED MEHANNI, Didier Montet, Joël Scher1 and Mbofung Carl Moses. Amino acid and fatty acid profile of twenty wild plants used as spices in Cameroon. American Journal of Food Science and Technology, 2016, Vol. 4, No. 2, 29-37 Read more

Design, Characterization, DNA Interaction and antimicrobial of novel copper(II) Schiff base amino acid complexes
Five novel copper(II) complexes derived from the condensation between 5-bromosalicyaldhyde (bs) and α-amino acids (L-alanine, L-phenylalanine, L-aspartic acid, L-histidine and L-arginine) were synthesized and characterized by their elemental analyses, thermogravemetric analysis, IR, electronic spectra and conductance and magnetic measurements. Moreover, the stoichiometry and the stability constants of the prepared complexes have been determined spectrophotometrically. The Results indicated that the Schiff ... Read more

Nano sized ternary Cu(II) complexes Encompassing Salicylaldehyde Derivatives and Amino Acids as an Effective Strategy for Antimicrobial Activity Improvement and DNA Interaction
A series of ternary Cu(II) complexes encompassing ONO donor Schiff base amino acid ligands were synthesized from condensation of 3–methoxysalicylaldehyde (MS) or 4-diethylamino salicylaldehyde (DS) with α-amino acids (L-phenylalanine (Phe), L-histidine (His), DL-tryptophan (Trp)) as primary ligand and 2, 4-bipridyl (DP) as secondary ligand. All the prepared compounds were characterized by melting points, decomposition temperatures, elemental analysis, UV-Vis, IR spectra, ... Read more

Physicochemichal properties, DNA interaction, antiviral and antioxidant activities of some Amino Acid Imine Chelates
Schiff base amino acid ligands which derived from the condensation of 3-methoxysalicylaldehyde (MS) or 4-diethylaminosalicylaldehyde (DS) with some of α-amino acids (Phenylalanine (Phe), Histidine (His), Tryptophan (Trp)) were prepared. Moreover, eleven Schiff base amino acid binary Fe(II) and Cu(II) complexes were prepared. In addition to, five ternary Cu(II) complexes which derived from the prepared Schiff base amino acid ligands as ... Read more

2018-09-27 05:15:58 Keywords amino acid,
Synthesis, Characterization and Spectrophotometric Studies of Seven Novel Antibacterial Hydrophilic Iron(II) Schiff Base Amino Acid Complexes
A series of new Iron(II) Schiff base amino acid complexes derived from the condensation of amino acid and sodium 2-hydroxybenzaldehyde-5-sulfonate have been synthesized. The complexes were characterized by elemental, electronic, IR spectral analyses and conductance measurements. The stability and solubility of the prepared complexes were determined. Two spectral methods used to determine the stoichiometry of the prepared complexes which exhibited ... Read more

Design, characterization, teratogenicity testing, antibacterial, antifungal and DNA interaction of few high spin Fe(II) Schiff base amino acid complexes
In this study, new Fe(II) Schiff base amino acid chelates derived from the condensation of o-hydroxynaphthaldehyde with l-alanine, l-phenylalanine, l-aspartic acid, l-histidine and l-arginine were synthesized and characterized via elemental, thermogravimetric analysis, molar conductance, IR, electronic, mass spectra and magnetic moment measurements. The stoichiometry and the stability constants of the complexes were determined spectrophotometrically. Correlation of all spectroscopic data suggested ... Read more