Výsledky vyhledávání

Synthesis of anionic chitosan surfactant and application in silver nanoparticles preparation and corrosion inhibition of steel

Autor: S.H. Shafek, Emad A. Badr, Samy M. Shaban, Hassan H.H. Hefni

Publikováno v: International Journal of Biological Macromolecules. 157:187-201

Three anionic chitosan surfactant with different hydrophobic tails labeled Chitosan-R8, Chitosan-R12 and Chitosan-R16 were prepared and their surface behavior in aqueous solution was determined by surface tension measurements at three different tempe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f767a44c2320d1af3e4a8029ca5191d0
https://doi.org/10.1016/j.ijbiomac.2020.04.184

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Akademický článek

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Effect of some prepared superplasticizers on the rheological properties of oil well cement slurries

Autor: S.H. Shafek, Ahmed I. Adawy, A. M. El-Sabbagh, Salah A. Abo-El-Enein, Ismail Aiad

Publikováno v: Egyptian Journal of Petroleum, Vol 27, Iss 4, Pp 1061-1066 (2018)

Three superplasticizers namely: cyclohexanone glyoxylic sulfanilate (CGS), acetone glyoxylic sulfanilate (AGS) and melamine glyoxylic sulfanilate (MGS) were prepared and characterized using FT-IR. The prepared admixtures were evaluated as additives f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b9fbbc31973577e0cdb2a0c222197ff
https://doi.org/10.1016/j.ejpe.2018.03.011

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Synthesis and characterization of new 1,2,4-triazole anticancer scaffold derivatives: In Vitro study

Autor: Nabila Zein, Mervat M. Omran, Hamza Baghi, Ismail Aiad, S.H. Shafek, Samy M. Shaban

Publikováno v: Egyptian Journal of Chemistry. :9-10

Four Schiff bases were obtained via one direct click reaction between 3-amino-1H-1,2,4-triazole and different substituted benzaldehyde. The synthesized compounds were characterized on the basis of their spectral data including IR spectra and 1HNMR. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c8e1d81470151d987af876f319356398
https://doi.org/10.21608/ejchem.2021.64760.3386

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Akademický článek

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Effect of some prepared superplasticizers (Cyclohexanone Based) on compressive strength and physico-chemical properties of oil well cement pastes

Autor: Ismail Aiad, Ahmed M. Al-Sabagh, S.A. Abo-El-Enein, S.H. Shafek, Ahmed I. Adawy

Publikováno v: Scopus-Elsevier
Egyptian Journal of Petroleum, Vol 26, Iss 3, Pp 843-850 (2017)

Two different superplasticizers particularly cyclohexanone formaldehyde sulfanilate (CFS) and cyclohexanone glyoxylic sulfanilate (CGS) were prepared; also, their effect on mechanical and physico-chemical properties of oil well cement was assessed. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5acb429dda4aea500739c5b5eb7a54b8
https://doi.org/10.1016/j.ejpe.2016.10.019

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Synthesis of Schiff base-based cationic Gemini surfactants and evaluation of their effect on in-situ AgNPs preparation: Structure, catalytic, and biological activity study

Autor: Asma M. Elsharif, Samy M. Shaban, Emad A. Badr, Dong-Hwan Kim, S.H. Shafek, Hassan H.H. Hefni, Adnan Alhathal Alanezi

Publikováno v: Journal of Molecular Liquids. 326:115342

Carcinogenic organic pollutants pose a threat to human health and the environment; therefore, appropriate solutions are required for their removal. In this study, three hybrid systems composed of surfactants and silver nanoparticles (AgNPs) were prep

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d6b49c0217239aca315731f53d5f6cbb
https://doi.org/10.1016/j.molliq.2021.115342

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Akademický článek

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EFFECT OF SOME PREPARED SUPERPLASTICIZERS (ACETONE BASED) ON PHYSICO-CHEMICAL AND MECHANICAL PROPERTIES OF OIL WELL CEMENT PASTES

Autor: A. M. El-Sabbagh, Salah A. Abo-El-Enein, S.H. Shafek, Ahmed I. Adawy, Ismail Aiad

Publikováno v: Bulletin of Faculty of Science, Zagazig University. 2016:1-17

This study aims to prepare two different superplasticizers particularly acetone formaldehyde sulfanilate (AFS) and acetone glyoxylic sulfanilate (AGS); also, their effect on physico-chemical and mechanical properties of oil well cement was studied. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e62fd037a0d6d1a301911edff8cc85e
https://doi.org/10.21608/bfszu.2016.31062

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Antimicrobial potentials and surface activities of novel di-Schiff base nonionic surfactants bearing unsaturated hydrophobic tails

Autor: Haya A. Abubshait, S.H. Shafek, Samar A. Abubshait, Nabel A. Negm

Publikováno v: Journal of Molecular Liquids. 290:110986

A series of nonionic Schiff base surface active agents were prepared by the reaction between polyoxyethylene, glyoxalic acid and phenylene diamine. The compounds structures were described by means of micro-elemental analysis, infrared and proton magn

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fcc048c680b7beec49f0dbfca1dfa5c2
https://doi.org/10.1016/j.molliq.2019.110986

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