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Materials (Basel)
June 2020
Egyptian Petroleum Research Institute (EPRI), Nasr, 11727 Cairo, Egypt.
Three new cationic gemini surfactants with ester spacer type 2-2'-(ethane-1,2-diyl bis(oxy)) bis(N-(2-alkanamidoethyl)-N,N-dimethyl-2-oxoethan-1-aminium)) dichloride) (CGSES12, CGSES14 and CGSES16), based on ,-dimethyl fatty amido ethylamine, were produced. These gemini quaternary ammonium salts were synthesized using a three-step reaction method, starting from th/e condensation of the fatty acid chloride (RCOCl) of various hydrophobic chain lengths (R, CH, CH, CH) with ,-dimethyl ethylene diamine, followed by the quaternization of the tertiary amino group formed with the spacer of the ester group formed in the second step. The chemical configuration of the surfactants was established by FT-IR, HNMR, CNMR and Mass spectroscopies.
View Article and Find Full Text PDFDalton Trans
June 2012
Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain.
We describe here the synthesis and characterization of new sulfonated and carboxylated-containing N-donor ligands [Na(4)(edts)]·4H(2)O (2), [Na(2)(dmeddp)]·2H(2)O (3) and [Na(4)(edtp)]·H(2)O (4) (edts = ethylene-diamine- N,N,N',N'-tetraethylenesulfonate ion; dmeddp = dimethyl-ethylene-diamine-N,N,N',N'-tetra-3-propionate ion; edtp = ethylene-diamine-N,N,N',N'-tetra-3-propionate ion) and their corresponding metal (Ni, Co, Cu and Zn) complexes. Mainly, UV-Vis and a computer aided analysis of the EPR spectra provided information on the geometry and structure of the complexes in solution. Some of the metal complexes inhibit HIV replication when treating both pre- and post-infected PBMC cells, and hustle the inhibitory effect compared to the metal salts alone.
View Article and Find Full Text PDFGynecol Oncol
February 2005
Department of Obstetrics and Gynecology, University of Michigan Medical Center, Med. Sci. II, 1500 E. Medical Center Drive, Ann Arbor, MI 48109-0618, USA.
Objective: HSP90 is a cellular chaperone that is overexpressed in many cancers. HSP90 assists in proper folding of a variety of clients, many of which are oncoproteins. HSP90 has been shown to be elevated in endometrial, ovarian, and breast cancer.
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