Results 61 to 70 of about 1,268,549 (300)

Recovery of betulinic acid from plane tree (Platanus acerifolia L.) [PDF]

, 2015
Betulinic acid (3β, hydroxy-lup-20(29)-en-28-oic acid) is a bioactive triterpenic acid which was identified in various botanical sources and in considerable amounts in the bark of plane tree (Platanus acerifolia L.).
Fornari, Tiziana, López-Padilla, Alexis, Pinilla, José María, Quintela, J. C., Reglero, Guillermo, Vicente, G.   +5 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

One-step ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction coupled with high-performance liquid chromatography for the determination of pyrethroids in traditional Chinese medicine oral liquid preparations

BMC Chemistry, 2019
In this study, a simple one-step ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction technique was coupled with high-performance liquid chromatography for the analysis of four pyrethroids in three kinds of traditional Chinese ...
Yiyi Liao, Yuge Hou, Yan Zhong, Hong Chen, Chang Xu, Makoto Tsunoda, Yingxia Zhang, Shiming Deng, Yanting Song   +8 more
doaj   +1 more source

Liquid–liquid extraction: thermodynamics–kinetics driven processes explored by microfluidics

Comptes Rendus. Chimie, 2022
Liquid–liquid extraction processes, characterized on-line by instrumented microfluidic platform, significantly enhance the development of predictive thermodynamic models, such as ienaics, and lay the foundations for new approaches to improve kinetic ...
Olivier, Fabien, Maurice, Ange A., Meyer, Daniel, Gabriel, Jean-Christophe P.   +3 more
doaj   +1 more source

Comparison of extraction methods for analysis of flavonoids in onions [PDF]

, 2008
Onions are known to contain high levels of flavonoids and a comparison of the efficiency, reproducibility and detection limits of various extraction methods has been made in order to develop fast and reliable analytical methods for analysis of flavonoids
Knuthsen, Pia, Nielsen, John, Soeltoft, Malene   +2 more
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Liquid membrane extraction of bio-active amphiphilic substances: Recovery of surfactin [PDF]

, 2008
The interest of application of liquid membrane (pertraction) processes for recovery of biosurfactants from aqueous media was demonstrated. Transport of pure surfactin in three-liquid-phase system was studied.
Dimitrov, Krasimir, Gancel, Frédérique, Montastruc, Ludovic, Nikov, Iordan   +3 more
core   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Vortex Assisted Extraction for Propylparaben Analysis in Cosmetics

ASM Science Journal, 2019
Propylparaben is an ester of para-hydroxybenzoic acid and commonly used as a preservative in the cosmetics, pharmaceuticals and food products. However, several recent reports demonstrated that paraben possesses an estrogenic activity and causes cancer ...
Noorashikin Md Saleh
doaj   +1 more source

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source

Extraction Of y-Oryzanol And Tocopherols From Rice (Oryza Sativa) Bran [PDF]

, 2008
The objective of this study was to extract y-oryzanol and tocopherols from rice bran. Different extraction times and sequential extractions utilizing different solvents on y- oryzanol and tocopherols levels from crude rice bran oil (CRBO) were studied.
Ismail, Rosnizam
core