Results 31 to 40 of about 491,525 (298)

A method for the rapid qualitative and quantitative analysis of 4,4-dimethyl sterols

open access: yesJournal of Lipid Research, 1973
A simple and relatively rapid technique has been developed for the separation of several 4,4-dimethyl steryl acetates, some of which contain sterically hindered nuclear double bonds.
G.F. Gibbons   +2 more
doaj   +1 more source

Ophiostomatoid fungi synergize attraction of the Eurasian spruce bark beetle, Ips typographus to its aggregation pheromone in field traps

open access: yesFrontiers in Microbiology, 2022
Eurasian spruce bark beetle, Ips typographus is a destructive pest of the Norway spruce (Picea abies). Recent outbreaks in Europe have been attributed to global warming and other anthropogenic impacts.
Anna Jirošová   +5 more
doaj   +1 more source

Substrate specific hydrolysis of aromatic and aromatic-aliphatic esters in orchid tissue cultures

open access: yesActa Societatis Botanicorum Poloniae, 2014
We found that tissue cultures of higher plants were able, similarly as microorganisms, to transform low-molecular-weight chemical compounds. In tissue cultures of orchids (Cymbidium 'Saint Pierre' and Dendrobium phalaenopsis) acetates of phenols and ...
Agnieszka Mironowicz   +2 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

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

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

Acetate Metabolism and the Inhibition of Bacterial Growth by Acetate [PDF]

open access: yesJournal of Bacteriology, 2019
High concentrations of organic acids such as acetate inhibit growth of Escherichia coli and other bacteria. This phenomenon is of interest for understanding bacterial physiology but is also of practical relevance. Growth inhibition by organic acids underlies food preservation and causes problems during high-density ...
Pinhal, Stéphane   +3 more
openaire   +4 more sources

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

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

open access: yesFEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva   +5 more
wiley   +1 more source

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