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Mohamed Youssef Ali MOHAMED محمد يوسف علي محمد

Professor

أستاذ الأحافير والطبقات

كليات العلوم
Building 4, floor 2, Office 2 B 124
المنشورات
مقال فى مجلة
2017

PROTEOLYTIC ACTIVITY OF RECENT FORAMINIFERAL FUNGI ISOLATED FROM DIFFERENT COASTAL LAGOONS IN RED SEA COAST, EGYPT

Saleem, Mohamed Youssef and Abdel-Rahman . 2017

Twenty nine fungal species were isolated from 30 samples of picked recent foraminferal tests belong to three different coastal lagoons (Abu-Shaar, Umm al-Huwaytāt and Marsa Shūni lagoons) in red sea coast, Egypt. Aspergillus, Emericella, Paecilomyces, Penicillium and Trichoderma were the most prevalent genera on both dextrose Czapeks and potato dextrose
agar media at 28°C. From the above genera, the most dominant species were Aspergillus flavus, A. niger, A. terreus, Emericella nidulans, Paecilomyces variotii, Penicillium chrysogenum and Trichoderma harzianum. Screening of fungi for their abilities to produce protease enzyme indicated that, twelve species represented 41.38% of total fungi exhibited
high and moderate protease activity each. However, five species (17.24%) were low producers. Aspergillus flavus, Fusarium oxysporum and Penicillium chrysogenum were the most active species for protease production. These fungi exhibited maximum protease activity after 6 days of incubation at 32°C with initial pH 6. The crude enzyme of A. flavus
culture extract was concentrated by ammonium sulphate and dialysis. The partially purified enzyme produced 4.8 fold with recovery of 4 and the molecular weight estimated by SDSPAGE was about 48 kDa.
Key

نوع عمل المنشور
article
رقم المجلد
24
رقم الانشاء
9
مجلة/صحيفة
WulFenia
الصفحات
258-270
مزيد من المنشورات
publications

The upper Campanian to upperMaastrichtian sedimentary sequence of the Kiseiba Formation in southWestern Desert is sampled and described in two surface sections (Sinn El Kaddab and Wadi Abu Siyal…

بواسطة Mohamed Youssef & Abdelbaset El-Sorogy
2018
publications

To assess heavy metals in mangrove swamps of Sehat and Tarut coastal areas along the Arabian Gulf, 18 sediment samples were collected for Al, V, Cr, Mn, Cu, Zn, Cd, Pb, Hg, Sr, As, Fe, Co, and Ni…

بواسطة Khaled Al-Kahtany, Abdelbaset El-Sorogy, Fahd Al-Kahtany, Mohamed Youssef
2018
publications

Present work aims to document the distribution and metal contamination in the coastal sediments of the
Dammam Al-Jubail area, Saudi Arabian Gulf. Twenty-six samples were collected for Al, V…

بواسطة Abdelbaset El-Sorogy, Khaled Al-Kahtany, Mohamed Youssefa, Fahd Al-Kahtany, Mazen Al-Malky
2018