Results 31 to 40 of about 49,681 (164)

Detection and Quantification of Heme and Chlorophyll Precursors Using a High Performance Liquid Chromatography (HPLC) System Equipped with Two Fluorescence Detectors

open access: yesBio-Protocol, 2015
Intermediates of tetrapyrrole biosynthetic pathway are low-abundant compounds, and their quantification is usually difficult, time consuming and requires large amounts of input material.
Jan Pilný   +3 more
doaj   +1 more source

Effect of substituents on the 1H-NMR chemical shifts of 3-methylene-2-substituted-1,4-pentadienes [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
The principle of linear free energy relationships was applied to the 1H chemical shifts of the b-vinyl proton atoms of 3-methylene-2-substituted-1,4-pentadienes.
GORDANA S. USCUMLIC, NATASA V. VALENTIC
doaj  

Synthesis of Functionalized 4,5-Dihydroisoxazoles Decorated with the Dimethylphosphinoyl Group

open access: yesЖурнал органічної та фармацевтичної хімії, 2023
Aim. To synthesize a hybrid molecular platform incorporating dimethylphosphinoyl and 4,5-dihydroisoxazole moieties suitable for the creation of focused combinatorial libraries of compounds. Results and discussion.
Andrii V. Fedyk, Bohdan A. Chalyk
doaj   +1 more source

Reactivity of plasmalogens: kinetics of acid-catalyzed hydrolysis

open access: yesJournal of Lipid Research, 1969
The acid-catalyzed hydrolysis of the α,β-unsaturated ether group of two plasmalogens, lysophosphatidal choline and lysophosphatidal ethanolamine, and several model compounds (isobutyl vinyl ether, 1-butenyl ethyl ether, and dihydropyran) was studied by ...
Michael F. Frosolono, Maurice M. Rapport
doaj   +1 more source

Sustainable Synthesis of Vinyl Sulfones Using Copper Catalysis

open access: yesChemistry Proceedings
Sulfonyl derivatives are very important compounds as they can be found in sulfones and sulfonamides, two classes of compounds with prominent biological and pharmacological activities.
Dawid Halka   +3 more
doaj   +1 more source

Vinylation of Alcohols, Thiols, and Nitrogen Compounds Using a Stoichiometric Amount of In Situ Generated Acetylene

open access: yesOrganics
In this work, we developed a highly efficient and versatile environmentally benign methodology for the vinylation of a broad scope of substances, including alcohols, thiols, and nitrogen compounds.
Maria S. Ledovskaya   +3 more
doaj   +1 more source

Children's exposure to phthalates and non-phthalate plasticizers in the home: The TESIE study

open access: yesEnvironment International, 2019
Background: Phthalates and their potential replacements, including non-phthalate plasticizers, are ubiquitous in home environments due to their presence in building materials, plastics, and personal care products. As a result, exposure to these compounds
Stephanie C. Hammel   +7 more
doaj   +1 more source

Continuous multistep synthesis of 2-(azidomethyl)oxazoles

open access: yesBeilstein Journal of Organic Chemistry, 2018
An efficient three-step protocol was developed to produce 2-(azidomethyl)oxazoles from vinyl azides in a continuous-flow process. The general synthetic strategy involves a thermolysis of vinyl azides to generate azirines, which react with bromoacetyl ...
Thaís A. Rossa   +4 more
doaj   +1 more source

Bio-Inspired nacre-like nanolignocellulose-poly (vinyl alcohol)-TiO2 composite with superior mechanical and photocatalytic properties

open access: yesScientific Reports, 2017
Nacre, the gold standard for biomimicry, provides an excellent example and guideline for assembling high-performance composites. Inspired by the layered structure and extraordinary strength and toughness of natural nacre, nacre-like nanolignocellulose ...
Yipeng Chen   +7 more
doaj   +1 more source

THE STUDY OF THE PROPERTIES OF VULCANIZATES BASED ON ETHYLENE VINYL ACETATE RUBBERS WITH DIFFERENT CONTENT OF VINYL ACETATE UNITS

open access: yesТонкие химические технологии, 2018
The article studies the structure and properties of ethylene vinyl acetate rubbers and the influence of the vinyl acetate (VA) units content in the rubber on the technological, physical-mechanical, operating and electrical properties of vulcanizates. The
M. V. Syayleva   +3 more
doaj   +1 more source

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