Results 1 to 10 of about 360,654 (257)

Chemical composition of snakes.

open access: yesPLoS ONE, 2022
The present study was carried out to provide insight into the body composition of snakes, which is an important basis for determination of nutrient requirement and physiological processes.
Petra Kölle   +3 more
doaj   +4 more sources

Chemical composition of Leonurus quinquelobatus in Western Siberia

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2018
The chemical composition of plants should be studied in order to understand the role of environmental factors in accumulation of various chemical elements by them, as well as to make a better sense of the specifics of potential resource plants.
Y.V. Zagurskaya, Т.I. Siromlya
doaj   +1 more source

Preparation and Separation Properties of Electrospinning Modified Membrane with Ionic Liquid Terminating Polyimide/Polyvinylpyrrolidone@Polydopamine

open access: yesMembranes, 2022
In this paper, superhydrophilic polyimide (PI) membranes were prepared using the electrostatic spinning method, capped with a hydrophilic ionic liquid (IL), and blended with polyvinylpyrrolidone (PVP).
Peng Qi   +8 more
doaj   +1 more source

The chemical composition of the Sun [PDF]

open access: yesAstrophysics and Space Science, 2009
The solar chemical composition is an important ingredient in our understanding of the formation, structure, and evolution of both the Sun and our Solar System. Furthermore, it is an essential reference standard against which the elemental contents of other astronomical objects are compared.
Grevesse, N   +3 more
openaire   +15 more sources

Synthesis of a novel phosphate-containing ligand rhodium catalyst and exploration of its optimal reaction conditions and mechanism for the polymerization of phenylacetylene

open access: yesHeterocyclic Communications, 2023
Due to the chemical properties of Group VIII transition metals and their importance in catalytic processes, the reactions of rhodium and its neighboring organic complexes have received much attention as model systems.
Zhang Mingyu   +7 more
doaj   +1 more source

Synthesis of rhodium catalysts with amino acid or triazine as a ligand, as well as its polymerization property of phenylacetylene

open access: yesHeterocyclic Communications, 2022
Three novel rhodium complexes, with l-tyrosine (l-Tyr), l-arginine (l-Arg), or 2,4-diamino-6-phenyl-1,3,5-triazine (Dpt) as a ligand, named as [Rh(cod)(l-Tyr)], [Rh(cod)(l-Arg)], and [Rh(cod)(Dpt)2], respectively, had been synthesized for catalyzing the ...
Xu Rui   +3 more
doaj   +1 more source

Comparison of gas and kerosene oils chemical composition before and after hydrotreating using comprehensive two-dimensional gas chromatography

open access: yesJournal of Chromatography Open, 2022
Information on the detailed composition of the feedstock and product from the hydrotreating is essential for a better understanding of the reactions, possible optimization of the process conditions, development of new catalysts, and achieving a better ...
Lucie Šindelářová   +2 more
doaj   +1 more source

Crystallization of Nano-Sized Macromolecules by the Example of Hexakis-[4-{(N-Allylimino)methyl}phenoxy]cyclotriphosphazene

open access: yesNanomaterials, 2022
The synthesized compound was characterized by 31P, 13C, and 1H NMR spectroscopy and MALDI-TOF mass spectroscopy. According to DSC data, the compound was initially crystalline, but the crystal structure was defective.
Evgeniy Chistyakov   +2 more
doaj   +1 more source

Chemical Composition of Kombucha

open access: yesBeverages, 2022
Kombucha is a fermented sweetened tea with a mixed fermenting culture of yeast and acetic acid bacteria. While the history of kombucha is not completely clear, it is now available around the world and has shown an increase in availability and demand in ...
Peyton Bishop   +3 more
doaj   +1 more source

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