Khalaf Ali Fayez Abuamra

استاذ - أستاذ متفرغ

كلية العلوم

العنوان: قسم النبات والميكروبيولوجى -كلية العلوم -جامعة سوهاج



المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية: Antifungal

2018-10-21 08:30:39 الكلمات المفتاحية Pseudomonas aeruginosa, Phenazine, Antifungal, phz gene,
Antagonistic rhizobacteria, more specifically fluorescent pseudomonads, are known to control fungal root diseases of agronomic crops. In this study, Pseudomonas aeruginosa bacteria were isolated from Hibiscus sabdariffa (roselle) rhizosphere. Bacterial isolate was assayed by dual culture technique for potential biological control agent against Rhizoctonia solani, Fusarium oxysporum, Sclerotium rolfsii and Macrophomina phaseolina as phytopathogenic fungi in vitro. Among P. fluorescens ... إقراء المزيد

2018-09-29 19:35:08 الكلمات المفتاحية Zea mays. Gramineae., Benzoxazolinone, Zeaoxazolinone, Antifungal,
Zeaoxazolinone, a new antifungal 7-methoxy-2-benzoxazolinone dimer from Zea mays roots.
ABSTRACT A new 7-methoxy-2-benzoxazolinone dimer named zeaoxazolinone (2), together with four known compounds; 9-_Z_-hexadecenoic acid (1), 6-methoxy-benzoxazolinone (3), gallic acid (4), and _β_-sitosterol-3-_O_-_b_-D-glucopyranoside (5) were isolated from _Zea mays_ L. roots. The structures of the isolated compounds were established on the basis of UV, IR, 1D, 2D NMR, and MS spectral analyses. The antifungal activity of compound 2 was evaluated. ... إقراء المزيد

2018-09-16 14:32:30 الكلمات المفتاحية Schiff base, amino acid, Fe(II), Teratogenicity, DNA interaction, antibacterial, Antifungal, high spin, Design, IR,
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 ... إقراء المزيد

2018-09-10 13:00:55 الكلمات المفتاحية Antifungal, antibacterial, S-alkylpyridines, thienopyridines,
Synthesis and Biological Evaluation of Some Novel Thienopyridines
Alkylation of 4,6-diamino-3-cyanopyridine-2(1H)-thione (1) with active halo compounds namely; ethyl chloroacetate, chloroacetic acid, 2-chloro-N-phenylacetamide, chloroacetonitrile, or chloroacetamide gave S-alkyl derivatives 2-6, respectively. Thienopyridine derivatives 7-10 were furnished by heating of S-alkyl derivatives 2-6 in hot KOH solution or by reaction of compound 1 with appropriate halo compound directly in hot KOH solution. The reaction of compound 1 with 3-bromopentane-2,4-dione or ... إقراء المزيد

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