Zobrazeno 1 - 10
of 444
pro vyhledávání: '"R. El-Sayed"'
Publikováno v:
Arab Universities Journal of Agricultural Sciences, Vol 26, Iss Special issue (2D), Pp 2181-2196 (2018)
forts to try to overcome all obstacles to water supply in the short and long run. Especially in the light of contemporary changes, especially the construction of the Al-Nahda Dam, and therefore the aim of the research to identify the most important d
Externí odkaz:
https://doaj.org/article/1f343ec5546248b391a549e87f3cec1d
Autor:
R. El-Sayed
Publikováno v:
Grasas y Aceites, Vol 59, Iss 2, Pp 110-120 (2008)
A series of annelated pyrimidine derivatives has been synthesized via different heterocyclization reactions of suitably functionalized 6-(4-octadecyloxyphenyl)-4-oxo-2- thioxo-1,2,3,4-tetrahydropyrimidine-5-carbonitrile (4) with different electrophil
Externí odkaz:
https://doaj.org/article/b6cb8b0f650e4f2d94b476519688ce7f
Autor:
A. M. F. Eissa, R. El-Sayed
Publikováno v:
Grasas y Aceites, Vol 58, Iss 1, Pp 20-28 (2007)
The reaction of 2-hydroxyheptadecanoyl chloride (2) and anthranilic acid gave 2-(1-hydroxyheptadecyl)-4H-3,1-benzoxazin-4-one (3) which was used as starting material to synthesize some condensed and non-condensed heterocyclic compounds by a reaction
Externí odkaz:
https://doaj.org/article/a3750e76581449fcb852560a86397e90
Autor:
A. M. F. Eissa, R. El-Sayed
Publikováno v:
Grasas y Aceites, Vol 57, Iss 4, Pp 367-375 (2006)
T2-Hydroxyheptadecanoic acid chloride (2) reacted with anthranilic acid to produce 2-substituted-3,1-benzoxazin-4-one (3) which was used as starting material to synthesize some condensed and non-condensed heterocyclic compounds by reaction with nitro
Externí odkaz:
https://doaj.org/article/5fe9fd7fa13d491c842254fb8dc7040d
Autor:
R. El-Sayed
Publikováno v:
Grasas y Aceites, Vol 57, Iss 2, Pp 180-188 (2006)
The use of sodium 1-(4-amino-5-mercapto-4H-[1,2,4] triazol-3-yl) and heptadecane-1-sulfonate (2) as new precursors to synthesize some important biologically active heterocycles has been found to be effective. The reaction of 2 with carbon disulphide
Externí odkaz:
https://doaj.org/article/cb9a5e6850d54263bdae49f80410bac0
Publikováno v:
Grasas y Aceites, Vol 55, Iss 4, Pp 370-377 (2004)
Fatty acids isothiocyanate (1) was used as a starting material to synthesize some important heterocycles such as triazoles, oxazoles, thiazoles, benzoxazoles and quinazolines by treating with different types of nucleophiles such as nitrogen nucleophi
Externí odkaz:
https://doaj.org/article/e4e645dca1fc4b9e9ff4f3c127064977
Publikováno v:
AMB Express, Vol 12, Iss 1, Pp 1-11 (2022)
Abstract In this paper, gamma-irradiation was successfully used to intensify the yield of Zinc oxide nanoparticles (ZnONPs) produced by the fungus Alternaria tenuissima as a sustainable and green process. The obtained data showed that 500 Gy of gamma
Externí odkaz:
https://doaj.org/article/337283d35b4c4ed596bc41d2734cedf0
Autor:
Heba G. Hussein, El-Sayed R. El-Sayed, Nahed A. Younis, Abd El Hamid A. Hamdy, Saadia M. Easa
Publikováno v:
AMB Express, Vol 12, Iss 1, Pp 1-16 (2022)
Key points Discovery of four different promising endophytic fungi for a facile-synthesis of SeNPs. SeNPs were successfully mycosynthesized and characterized. SeNPs exhibited promising antifungal, antibacterial, and antioxidant activities.
Externí odkaz:
https://doaj.org/article/31ea8dbafdff459384b0ed001eb5c356
Publikováno v:
International Journal of Engineering and Technology. 14:84-88
Paraffin wax (PW) is commonly used as latent heat storage material in solar energy systems. The low thermal conductivity of the PW is considered the main drawback when it is used as thermal energy storage medium. In order to overcome this drawback, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b31f4c015c47d6ec672a8bea95dcf42
https://doi.org/10.7763/ijet.2022.v14.1208
https://doi.org/10.7763/ijet.2022.v14.1208
Autor:
Mohamed N. Abd El-Ghany, Salwa A. Hamdi, Reham M. Elbaz, Abeer S. Aloufi, Rana R. El Sayed, Ghadeer M. Ghonaim, Mohamed G. Farahat
Publikováno v:
Fermentation; Volume 9; Issue 6; Pages: 505
Astaxanthin is a xanthophyll carotenoid possessing impressive nutraceutical, antioxidant, and bioactive merits. Traditionally, astaxanthin is extracted from crustacean wastes via solvent extraction methods. However, the rigid structure of shells that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd41851a6f84849c21e2f50bca4a8bde