sabry.mahmoud

sabry.mahmoud

استاذ - أستاذ ورئيس قسم الميكروبيولوجى

كلية الزراعة

العنوان: 105 شارع الهلالى - شقه 215- برج عمر بن الخطاب - أسيوط - مصر

4

إعجاب

أساتذتى وزملائى وأبنائى الطلبه, أسعد بزيارتكم لموقعى الشخصى, داعيا المولى عز وجل أن يوفقنا الى ما فيه الخير لنا وبلادنا


2020-07-15 15:00:36 | الكلمات المفتاحية Tomato brown rugose fr, Tomato,
First report of Tomato brown rugose fruit virus on tomato in Egypt
In June 2019, leaf samples from hybrid tomato (Solanum lycopersicum cv. Elquds E448) were collected from four regions in Fayoum and Ismailia Governorates, Egypt. Twenty samples were collected from plants with viral symptoms and nine from asymptomatic plants. The diseased samples had mosaics, deformation and necrosis on the leaves , and discoloration and deformations on fruits. إقراء المزيد

2020-07-15 14:55:37 | الكلمات المفتاحية Cyclopept, peptide, amino acid,
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 ... إقراء المزيد

2020-07-15 14:53:13 | الكلمات المفتاحية Isophthalamide; amino acids; p,
In vitro anticancer potentiality and molecular modelling study of novel amino acid derivatives based on N1,N3-bis-(1-hydrazinyl-1-oxopropan-2-yl) isophthalamide
A series of N1,N3-bis (1-oxopropan-2-yl) isophthalamide-based derivatives 4–16 were prepared and their structures were confirmed by different spectral tools. The cytotoxic potentiality of novel compounds 4–16 was assessed by the MTT assay method on colon, lung and breast tumour cell lines. Compound 5 gave the most significant specificity anticancer activity with safety response on normal cell lines. In vitro enzyme ... إقراء المزيد

2018-10-18 19:26:52 | الكلمات المفتاحية
Extracellular biosynthesis of silver nanoparticles using Rhizopus stolonifer
Synthesis of silver nanoparticles (AgNPs) has become a necessary field of applied science. Biological method for synthesis of AgNPs by _Rhizopus stolonifer_ aqueous mycelial extract was used. The AgNPs were identified by UV–visible spectrometry, X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectrometry (FT-IR). The presence of surface plasmon band around 420 nm indicates AgNPs formation. The ... إقراء المزيد

2018-10-19 16:18:31 | الكلمات المفتاحية ESBL, Antimicrobial resistance;, water, E. coli,
Detection of extended spectrum beta-lactamase producing Escherichia coli on water at Hafr Al Batin, Saudi Arabia
In this study antibiotic resistant Escherichia coli from household water collected in Hafr AlBatin, Saudi Arabia, were characterized by prevalence of extended spectrum betalactamase (ESBL). Samples were collected from drinking and washing water at 12 locations. From the 144 samples obtained, Millipore membrane filters incubated on trypton soya agar plates produced colonies that yielded 34 isolates of E. coli as ... إقراء المزيد

2018-10-19 18:28:50 | تخمرات ميكروبيه
أنواع الصناعات التخميرية
1- ما المقصود بالبروتين الميكروبى؟ وما هى مميزات وعيوب إنتاج البروتين بأستخدام الميكروبات؟ 2- أشرح خطوات إنتاج كل من: كحول الأيثانول - حمض السيتريك -الخل، موضحا السلاله الميكروبيه والماده الخام المستخدمه والظروف المثلى للأنتاج. إقراء المزيد