Results 111 to 120 of about 101,731 (258)

The oxidation-reduction potential of coenzyme I [PDF]

open access: yes, 1940
The oxidation-reduction potential of cozymase (diphosphopyridine nucleotide) was calculated from the free energies of formation of aqueous d-alanine and d-glutamic acid based on thermal data, and the equilibria measured by Wurmser and Filitti-Wurmser(1 ...
Borsook, Henry
core  

Single Cu Atom Sites on Co3O4 Activate Interfacial Oxygen for Enhanced Reactivity and Selective Gas Sensing at Low Temperature

open access: yesSmall, EarlyView.
Atomically dispersed Cu sites on Co3O4 nanoparticles establish well‐defined Cu–O–Co interfacial linkages that promote lattice oxygen activation at markedly reduced temperatures. This structural and electronic modulation yields over twenty‐fold higher low‐temperature formaldehyde sensing responses than CuO nanoparticle analogues, enabling selective and ...
Hamin Shin   +7 more
wiley   +1 more source

Roaming in acetaldehyde

open access: yesThe Journal of Chemical Physics
We investigate roaming in the photodissociation of acetaldehyde (CH3CHO), providing insights into the contrasting roaming dynamics observed for this molecule compared to formaldehyde. We carry out trajectory studies for full-dimensional acetaldehyde, supplemented with an analysis of a two-degree-of-freedom restricted model and obtain evidence for two ...
Vladimír Krajňák, Stephen Wiggins
openaire   +3 more sources

Analysis of the atmospheric distribution, sources, and sinks of oxygenated volatile organic chemicals based on measurements over the Pacific during TRACE-P [PDF]

open access: yes, 2004
Airborne measurements of a large number of oxygenated volatile organic chemicals (OVOC) were carried out in the Pacific troposphere (0.1 - 12 km) in winter/spring of 2001 (24 February to 10 April).
Avery, MA   +16 more
core  

Nickel Foam Electrodes—A Versatile, Powerful, and Readily Available Tool in Electro‐Organic Synthesis

open access: yesThe Chemical Record, EarlyView.
Nickel foam—one material, two faces, and several versatile roles depending on electrolytic conditions. For more than 50 years, nickel foam electrodes have served in electrosynthesis as powerful and readily available electrode materials. Due to their inexpensive nature and easy handling, they have been widely employed.
Rok Narobe   +2 more
wiley   +1 more source

Evaluation of Acetaldehyde in Water Stored in Polyethylene Terephthalate (PET) Bottles Distributed in Retail Stage in Isfahan, Iran

open access: yesتحقیقات نظام سلامت, 2020
Background: Polyethylene Terephthalate (PET) is a polymeric resin of polyester group used in the manufacture of beverage bottles. Migration of PET ingredients such as acetaldehyde to the content of bottles has adverse effects on consumers’ health.
Neda Ghassami   +7 more
doaj  

Nicotine pouches and clinical outcomes related to smoking cessation: A systematic review of randomized trials

open access: yesAddiction, EarlyView.
Abstract Background and aims Tobacco‐free nicotine pouches (NPs) are oral nicotine products promoted by manufacturers and some researchers as tools that may reduce nicotine cravings and support smoking reduction or cessation. However, evidence regarding their actual clinical impact remains limited.
Javad Heshmati   +6 more
wiley   +1 more source

Nature's Starships II: Simulating the Synthesis of Amino Acids in Meteorite Parent Bodies

open access: yes, 2015
Carbonaceous chondrite meteorites are known for having high water and organic material contents, including amino acids. Here we address the origin of amino acids in the warm interiors of their parent bodies (planetesimals) within a few million years of ...
Cobb, Alyssa K.   +2 more
core   +1 more source

Oxygen‐independent expression of HIF‐1α during the cell cycle in hepatocellular carcinoma cells controls essential metabolic pathways under normoxia

open access: yesThe FEBS Journal, EarlyView.
In Huh7 cells, HIF‐1α is essential as it maintains the expression of proteins involved in glycolysis and steroid/cholesterol biosynthesis both under normoxia and hypoxia. On the other hand, in HeLa cells, these pathways are induced by HIF‐1α only under hypoxia.
Ioanna‐Maria Gkotinakou   +6 more
wiley   +1 more source

Metabolic thermodynamics: pertinent reference state and energy potentials

open access: yesThe FEBS Journal, EarlyView.
A recommendation and method to view the energy potentials of metabolites with reference to (green arrow) a biochemical precursor state (in green: water, Mg2+, phosphate, bicarbonate, ammonium, and sulfate, at pH = 7) rather than (the red arrow) the physical–chemical reference state (in grayish red) that is alien to biology, that is, O2, H2, N2 at 1 ...
Hans V. Westerhoff   +21 more
wiley   +1 more source

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