Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Essam Kotb"'
Autor:
Essam Kotb, Amira H. Alabdalall, Azzah I. Alghamdi, Ibtisam M. Ababutain, Sumayh A. Aldakeel, Safa K. Al-Zuwaid, Batool M. Algarudi, Sakina M. Algarudi, Asmaa A. Ahmed, Ahmed M. Albarrag
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract Forty-six promising chitinolytic isolates were recovered during a screening for chitinolytic bacteria in the environment of Saudi Arabia. The top three isolates belonged to the genus Streptomyces. Streptomyces variabilis Am1 was able to excr
Externí odkaz:
https://doaj.org/article/d2fd7a65fc874e4fb330e2e3919d2a4a
Autor:
Essam Kotb, Amira H. Al-Abdalall, Ibtisam Ababutain, Nada F. AlAhmady, Sahar Aldossary, Eida Alkhaldi, Azzah I. Alghamdi, Hind A. S. Alzahrani, Mashael A. Almuhawish, Moudhi N. Alshammary, Asmaa A. Ahmed
Publikováno v:
Antibiotics, Vol 13, Iss 4, p 347 (2024)
An endophytic symbiont P. aeruginosa-producing anticandidal siderophore was recovered from mangrove leaves for the first time. Production was optimal in a succinate medium supplemented with 0.4% citric acid and 15 µM iron at pH 7 and 35 °C after 60
Externí odkaz:
https://doaj.org/article/803c71d253d748d0a7c0aadfbdf94fab
Autor:
Essam Kotb, Baher A. El-Nogoumy, Haifa A. Alqahtani, Asmaa A. Ahmed, Hussah A. Al-shwyeh, Sakina M. Algarudi, Hanan Almahasheer
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)
Abstract A putative virulence exoprotease designated as UcB5 was successfully purified from the bacterium Salmonella typhimurium to the electrophoretic homogeneity with 13.2-fold and 17.1% recovery by hydrophobic, ion-exchange, and gel permeation chr
Externí odkaz:
https://doaj.org/article/f49466a7c706451dad9798ea680b36dd
Publikováno v:
Journal of Experimental Nanoscience, Vol 17, Iss 1, Pp 100-112 (2022)
Nowadays, antibiotic resistance is a serious problem, especially in countries that have unregulated use of antibiotics. We aimed to prepare and characterize Sily-Nano from silymarin to present its antimicrobial activities in comparison to silymarin a
Externí odkaz:
https://doaj.org/article/d72b9a16550b4ecc8de43b93ef61f4cc
Publikováno v:
PLoS ONE, Vol 18, Iss 3, p e0282963 (2023)
Ninety-one elastase-producing bacterial isolates were recovered from different localities of the Eastern Province of Saudi Arabia. Elastase from the best isolate Priestia megaterium gasm32, from luncheon samples was purified to electrophoretic homoge
Externí odkaz:
https://doaj.org/article/e0c65505c12c4be79c2f7248f715b3a4
Autor:
Essam Kotb, Amira H. Alabdalall, Mariam A. Alsayed, Azzah I. Alghamdi, Eida Alkhaldi, Sayed AbdulAzeez, J. Francis Borgio
Publikováno v:
Fermentation, Vol 9, Iss 7, p 637 (2023)
In this study, thirty-seven alkaline protease-producing bacteria were recovered from different regions of Saudi Arabia. The proteolytic strain with the highest productivity was identified as Bacillus sp. Mar64. Maximum productivity of Mar64P alkaline
Externí odkaz:
https://doaj.org/article/0d1bbc16e212422c9bb00a326ea5059c
Autor:
Nadiyah M. Alabdallah, Essam Kotb
Publikováno v:
Microorganisms, Vol 11, Iss 3, p 807 (2023)
Silver nanoparticles (AgNPs) were biosynthesized for the first time from waste leaves extract of local doum palms in Tabuk, Saudi Arabia. The transmission electron microscope (TEM) revealed a spherical shape with a particle size from 18 to 33 nm. The
Externí odkaz:
https://doaj.org/article/dd649198a32b4be7bcfd0ed82d933998
Publikováno v:
Arabian Journal of Chemistry, Vol 15, Iss 2, Pp 103606- (2022)
Pulsed laser ablation in liquid (PLAL) has verified its surpassing advantages in the fabrication of several high purity nanostructured metals and metal oxides. In this work, ZnO/CuO heterostructure nanocomposites have been fabricated by laser ablatio
Externí odkaz:
https://doaj.org/article/e00c8e74aed14097b8f9f0983013401c
Autor:
Amal Mahmoud, Essam Kotb, Amany I. Alqosaibi, Ahmed A. Al-Karmalawy, Ibtesam S. Al-Dhuayan, Hameedah Alabkari
Publikováno v:
Heliyon, Vol 7, Iss 10, Pp e08148- (2021)
In this study, we have isolated and characterized proteolytic soil bacteria and their alkaline protease. Based on 16S rRNA sequence analysis, 12 isolates with the highest protease activity were classified as B. subtilis and B. cereus groups. B. subti
Externí odkaz:
https://doaj.org/article/398e1332e9b746798705f1f55c127570
Publikováno v:
Pharmaceutics, Vol 13, Iss 7, p 923 (2021)
Background: Proteases are among the most important industrial enzymes, playing a critical role in the physiological, biochemical, and regulatory processes of all living organisms. This study evaluated the histological effects of a Bacillus subtilis D
Externí odkaz:
https://doaj.org/article/f6b1cfca8d98417e9b6ef1982ca95238