Results 121 to 130 of about 5,015,544 (332)

Modeling of the formation of short-chain acids in propane flames [PDF]

open access: yesarXiv, 2009
In order to better understand their potential formation in combustion systems, a detailed kinetic mechanism for the formation of short-chain monocarboxylic acids, formic (HCOOH), acetic (CH3COOH), propionic (C2H5COOH) and propenic (C2H3COOH)) acids, has been developed. Simulations of lean (equivalence ratios from 0.9 to 0.48) laminar premixed flames of
arxiv  

Discovery Of Copper Catalyst For New Chemical Polishing Acid On Superconducting Niobium [PDF]

open access: yesarXiv, 2020
High field Q-slope (HFQS) seriously limits the high gradient performance of the buffered chemically polished (BCP) superconducting radio frequency (SRF) niobium cavities. The direct cause or mechanism is not yet fully understood. In our recent extensive data analysis, we concluded that the potential root cause could be nitrogen contamination on the ...
arxiv  

A thermodynamic basis for prebiotic amino acid synthesis and the nature of the first genetic code [PDF]

open access: yes, 2009
Of the twenty amino acids used in proteins, ten were formed in Miller's atmospheric discharge experiments. The two other major proposed sources of prebiotic amino acid synthesis include formation in hydrothermal vents and delivery to Earth via meteorites.
arxiv   +1 more source

Biochemical and structural characterization of chlorite dismutase enzyme from Pseudomonas aeruginosa

open access: yesThe FEBS Journal, EarlyView.
Chlorite dismutase (Cld) is a heme b oxidoreductase that can decompose chlorite (ClO2−$$ {\mathrm{ClO}}_2^{-} $$ or OClO−) into harmless chloride (Cl−) and dioxygen (O2) with high turnover rates. Cld was found to be involved in different biological processes, and the rare reaction it catalyzes makes it a prominent enzyme for different applications. The
Dimitrios V. Nokas   +7 more
wiley   +1 more source

Life at new extremes: Integrating stress physiology and the bio‐exposome in the Anthropocene

open access: yesAnnals of the New York Academy of Sciences, EarlyView.
We propose to expand the concept of extreme environments to encompass those that are profoundly altered by climate and global changes, highlight the critical role of stress resilience in understanding how the exposome interacts with intracellular processes (bio‐exposome) in wildlife, emphasize how such interactions are relevant to the human bio ...
David Costantini   +3 more
wiley   +1 more source

Plasma Concentrations of Myeloperoxidase Predict Mortality After Myocardial Infarction [PDF]

open access: yes, 2007
ObjectivesThis study investigated relationships between plasma myeloperoxidase (MPO), protein oxidation markers, and clinical outcome retrospectively in patients after acute myocardial infarction (MI).BackgroundReactive oxidants are implicated in ...
Cameron, Vicky A.   +6 more
core   +1 more source

Reactive oxygen-related diseases: therapeutic targets and emerging clinical indications [PDF]

open access: yes, 2015
SIGNIFICANCE Enhanced levels of reactive oxygen species (ROS) have been associated with different disease states. Most attempts to validate and exploit these associations by chronic antioxidant therapies have provided disappointing results. Hence, the
Ana I. Casas   +21 more
core   +2 more sources

LC/ESI-MS analysis of underivatized amino acids and mass spectrum [PDF]

open access: yesarXiv, 2016
We report the method of LC/ESI-MS analysis of underivatized amino acids with corresponding mass spectrum and fragmentation patterns. Diagnostic product ions determined by mass spectrometry can support the qualitative identification and quantitative estimation of individual amino acids. Therefore, the optimization of chromatographic separation using the
arxiv  

Comparative reactivity of the myeloperoxidase-derived oxidants HOCl and HOSCN with low-density lipoprotein (LDL): Implications for foam cell formation in atherosclerosis [PDF]

open access: yes, 2015
© 2015 Elsevier Inc. All rights reserved. Abstract Atherosclerosis is characterised by the accumulation of lipids within macrophages in the artery wall.
Brown, BE   +6 more
core   +1 more source

Probing the toxic hypochlorous acid in natural waters and biosystem by a coumarin-based fluorescence probe

open access: yesEcotoxicology and Environmental Safety
Since the onset of the SARS-CoV-2 pandemic in early 2020, there has been a notable rise in sodium hypochlorite disinfectants. Sodium hypochlorite undergoes hydrolysis to generate hypochlorous acid for virus eradication.
Junyan Ma   +6 more
doaj  

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