Results 51 to 60 of about 455,246 (392)

Nutritional Ketoacidosis During Incremental Exercise in Healthy Athletes

open access: yesFrontiers in Physiology, 2019
Purpose: Ketosis, achieved through ingestion of ketone esters, may influence endurance exercise capacity by altering substrate metabolism. However, the effects of ketone consumption on acid-base status and subsequent metabolic and respiratory ...
David J. Dearlove   +5 more
doaj   +1 more source

β-Hydroxybutyrate Oxidation in Exercise Is Impaired by Low-Carbohydrate and High-Fat Availability

open access: yesFrontiers in Medicine, 2021
Purpose: In this study, we determined ketone oxidation rates in athletes under metabolic conditions of high and low carbohydrate (CHO) and fat availability.Methods: Six healthy male athletes completed 1 h of bicycle ergometer exercise at 75% maximal ...
David J. Dearlove   +12 more
doaj   +1 more source

Heterogenisation of ketone catalysts within mesoporous supports for asymmetric epoxidation

open access: yes, 2013
The synthesis of the first mesoporous silica (150 Å) anchored carbohydrate-derived chiral ketone is described. This new heterogeneous catalyst has been shown to be effective in the asymmetric epoxidation of olefins by oxone.
Adam   +60 more
core   +1 more source

Conformational modulation of sequence recognition in synthetic macromolecules [PDF]

open access: yes, 2011
The different triplet sequences in high molecular weight aromatic copolyimides comprising pyromellitimide units ("I") flanked by either ether-ketone ("K") or ether-sulfone residues ("S") show different binding strengths for pyrene-based tweezer-molecules.
Cardin, Christine   +6 more
core   +1 more source

Effects of ketogenic diet and ketone bodies on the cardiovascular system: Concentration matters

open access: yesWorld Journal of Diabetes, 2020
Ketone bodies have emerged as central mediators of metabolic health, and multiple beneficial effects of a ketogenic diet, impacting metabolism, neuronal pathologies and, to a certain extent, tumorigenesis, have been reported both in animal models and ...
Souad Nasser   +4 more
semanticscholar   +1 more source

Effects of insecticidal ketones present in mint plants on GABA A receptor from mammalian neurons [PDF]

open access: yes, 2017
The genus Mentha, an important member of the Lamiaceae family, is represented by many species commonly known as mint. The insecticidal activity of Mentha oil and its main components has been tested and established against various insects/pests.
Delgado Marín, Leticia Ester   +2 more
core   +2 more sources

Traceless Solid-Phase Synthesis of Ketones via Acid-Labile Enol Ethers: Application in the Synthesis of Natural Products and Derivatives

open access: yesMolecules, 2019
In solid-phase organic synthesis, Wang resin is traditionally used for the immobilization of acids, alcohols, phenols, and amines. We report the use of Wang resin for the traceless synthesis of ketones via acid-labile enol ethers.
Eva Schütznerová   +2 more
doaj   +1 more source

Introduction of functional groups on polyethylene surfaces by a carbon dioxide plasma treatment [PDF]

open access: yes, 1995
Poly(ethylene) (PE) films were treated with a carbon dioxide (CO2) plasma to study the formation of oxygen-containing functional groups at the surface. Modified and nonmodified films were characterized by X-ray photoelectron spectroscopy (XPS) and water ...
Feijen, Jan   +3 more
core   +2 more sources

Pd-catalyzed enantioselective aerobic oxidation of secondary alcohols: Applications to the total synthesis of alkaloids [PDF]

open access: yes, 2008
Enantioselective syntheses of the alkaloids (-)-aurantioclavine, (+)-amurensinine, (-)-lobeline, and (-)- and (+)-sedamine are described. The syntheses demonstrate the effectiveness of the Pd-catalyzed asymmetric oxidation of secondary alcohols in ...
Bagdanoff, Jeffrey T.   +5 more
core   +2 more sources

Increased ketone body oxidation provides additional energy for the failing heart without improving cardiac efficiency.

open access: yesCardiovascular Research, 2019
AIMS The failing heart is energy-starved and inefficient due to perturbations in energy metabolism. Although ketone oxidation has been shown recently to increase in the failing heart, it remains unknown whether this improves cardiac energy production or ...
Kim L. Ho   +11 more
semanticscholar   +1 more source

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