Results 101 to 110 of about 141,863 (280)

On-site quantitation of morphine in urine by fast derivatization and miniature mass spectrometry analysis

open access: gold, 2022
Manqing Kang   +4 more
openalex   +1 more source

Sensitized Disequilibration of Water‐Soluble Azopolymers

open access: yesAngewandte Chemie, EarlyView.
Disequilibration by sensitization under confinement (DESC) is a promising strategy for efficient visible‐light‐induced azobenzene E→Z isomerization. In this article, we explored key factors for adapting DESC to azopolymers, eventually achieving efficiencies up to 85% compared to direct excitation and laying the foundation for more complex systems ...
Henning Jörn Meteling   +4 more
wiley   +2 more sources

DEVELOPMENT OF METHODS OF PRE-COLUMNAR DERIVATIZATION OF GLUTATHIONES RECOVERED BY 4-METHOXY-2-NITROPHENYLISOTHIOTOCIONATE FOR DETERMINATION BY METHOD OF HIGH-EFFECTIVE LIQUID CHROMATOGRAPHY

open access: yesФармация и фармакология (Пятигорск), 2018
Nowadays the pharmacological role of glutathione in the therapy of carcinogenesis, neurodegenerative and ocular diseases, heart diseases, the immune system and aging of the organism is being actively investigated.
K. A. Alexeeva   +3 more
doaj   +1 more source

Chromatography of beer [PDF]

open access: yes, 2013
The objectives of the review are the collection, concise description and evaluation of the various chromatographic techniques used for the separation and quantitative determination of macro- and microcomponents present in ...
Cserháti, Tibor, Szőgyi, Mária
core  

Steady state fluorescence studies on lipase-vesicle interactions [PDF]

open access: yes, 1994
The interaction of lipase from Candida cylindracea (CCL) with positively charged polymerizable surfactant vesicles was studied by the use of steady-state fluorescence techniques. The phase transition of vesicles composed of nonpolymerized and polymerized
Engbersen, Johan F.J.   +3 more
core   +3 more sources

Copper‐Catalyzed Three‐Component Selective 1,4‐Amino Oxygenation of 1,3‐Dienes

open access: yesAngewandte Chemie, EarlyView.
Enclosed is a copper‐catalyzed selective 1,4‐amino oxgenation of 1,3‐dienes with the presence of a strong Brønsted acid. This three‐component transformation offers a novel and powerful approach to construct (E)‐1,4‐allylic amino oxygenated motifs by the simultaneous installation of structurally diverse alkylamines and alcohols directly onto 1,3‐dienes.
Guangshou Feng   +2 more
wiley   +2 more sources

Activation of Cyanate Anions by Phosphine Radical Cations Enables Formal Hydrocarbamoylation of Alkenes

open access: yesAngewandte Chemie, EarlyView.
A photocatalytic formal hydrocarbamoylation reaction that employs a cyanate anion as the C1 source and provides N‐acyl iminophosphorane products from activated alkenes is described. Mechanistic investigations suggest generation of a phosphoranyl radical by addition of the cyanate anion to a phosphine radical cation, which enables the delivery of the ...
Petra Vojáčková, Armido Studer
wiley   +2 more sources

HPLC-MS/MS method development and validation for the determination of tetradecapeptide in human plasma

open access: yesРазработка и регистрация лекарственных средств
Introduction. The number of peptide drugs being developed and registered has increased in recent years. Therefore, modern analytical approaches and methods are required to determine these substances in biological matrices during pharmacokinetic studies ...
M. A. Tokareva   +5 more
doaj   +1 more source

Determining the distribution of triclosan and methyl triclosan in estuarine settings [PDF]

open access: yes, 2014
We have developed a method for the analysis of two sewage-derived contaminants: triclosan (TCS), an antibacterial agent, and methyl triclosan (MTCS), a TCS metabolite.
Agüera   +44 more
core   +2 more sources

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