Results 21 to 30 of about 15,269 (248)

Synthesis, Characterization, and Antifungal Property of Hydroxypropyltrimethyl Ammonium Chitosan Halogenated Acetates

open access: yesMarine Drugs, 2018
Hydroxypropyltrimethyl ammonium chitosan halogenated acetates were successfully synthesized from six different haloacetic acids and hydroxypropyltrimethyl ammonium chloride chitosan (HACC) with high substitution degree, which are hydroxypropyltrimethyl ...
Yingqi Mi   +7 more
doaj   +1 more source

Chiral phosphines in nucleophilic organocatalysis

open access: yesBeilstein Journal of Organic Chemistry, 2014
This review discusses the tertiary phosphines possessing various chiral skeletons that have been used in asymmetric nucleophilic organocatalytic reactions, including annulations of allenes, alkynes, and Morita–Baylis–Hillman (MBH) acetates, carbonates ...
Yumei Xiao   +3 more
doaj   +1 more source

New Cytotoxic and Antibacterial Compounds Isolated from the Sea Hare, Aplysia kurodai

open access: yesMarine Drugs, 2005
: The extract of the sea hare, Aplysia kurodai, showed cytotoxicity against HeLa cells and antibacterial activity against Staphylococcus aureus. Bioassay-guided purification afforded four active compounds, which were identified to be laurinterol ...
Tomihisa Ohta   +2 more
doaj   +1 more source

The differential migration of sterol acetates on silica gels and its application to the fractionation of sterol mixtures*

open access: yesJournal of Lipid Research, 1962
The retention volumes of 12 sterol acetates relative to cholesteryl acetate were determined on four well-characterized silica gels of different body structure.
Peter D. Klein, Patricia A. Szczepanik
doaj   +1 more source

Metal-containing ceramic nanocomposites synthesized from metal acetates and polysilazane

open access: yesOpen Ceramics, 2020
Metal-containing (Mn, Fe, Co, Cu, Zn and Ag) polysilazane precursors are synthesized via one-step chemical reaction of metal acetates with poly(vinyl)silazane (Durazane 1800) at room temperature under argon atmosphere.
Jun Wang   +8 more
doaj   +1 more source

Synthesis and Biological activity of 4-(4,6-Disubstituted-pyrimidin-2-yloxy)phenoxy Acetates

open access: yesMolecules, 2010
Ten novel 4-(4,6-dimethoxypyrimidin-2-yloxy)phenoxy acetates and 4-(4,6-dimethylpyrimidin-2-yloxy)phenoxy acetates were synthesized with hydroquinone, 2-methylsulfonyl-4,6-disubstituted-pyrimidine and chloroacetic ester as starting materials.
Xinhuan Teng   +3 more
doaj   +1 more source

Abiraterone Acetate [PDF]

open access: yesDrugs in R&D, 2010
Abiraterone acetate (CB 7630; CB7630; JNJ-212082), the 3β-acetate prodrug of abiraterone, is structurally related to ketoconazole and is being developed by Cougar Biotechnology as a hormonal therapy for advanced prostate and breast cancers. As a selective inhibitor of adrenal androgens, it is thought to be a safer product than existing second-line ...
openaire   +2 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

open access: yesFEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka   +11 more
wiley   +1 more source

Reasoned opinion on the modification of the existing MRL for guazatine in citrus fruits

open access: yesEFSA Journal, 2014
In accordance with Article 6 of Regulation (EC) No 396/2005, the United Kingdom, hereafter referred to as the evaluating Member State (EMS), received an application from Exponent International Ltd., on behalf of ICA International Chemicals (PTY) Ltd., to
European Food Safety Authority
doaj   +1 more source

Ulipristal Acetate versus Leuprolide Acetate for Uterine Fibroids [PDF]

open access: yesNew England Journal of Medicine, 2012
The efficacy and side-effect profile of ulipristal acetate as compared with those of leuprolide acetate for the treatment of symptomatic uterine fibroids before surgery are unclear.In this double-blind noninferiority trial, we randomly assigned 307 patients with symptomatic fibroids and excessive uterine bleeding to receive 3 months of daily therapy ...
Donnez J1   +14 more
openaire   +2 more sources

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