Results 71 to 80 of about 4,994,766 (232)
Oxidation‐Deformylation Cascade Catalyzed By a Mononuclear Copper Complex
Chemistry – A European Journal, Volume 31, Issue 26, May 8, 2025.A bioinspired copper complex is able to catalyze two successive oxidative steps of alcohol conversion in the presence of hydrogen peroxide under mild conditions: (i) alcohol oxidation to aldehyde and (ii) aldehyde deformylation. Isotopic effects on the reaction rates indicate that hydrogen atom abstraction is rate limiting for both steps.
Yongxing Wang +8 more
wiley +1 more source
Kynurenine pathway metabolite alterations in Down syndrome and Alzheimer's disease
Alzheimer's &Dementia, Volume 21, Issue 5, May 2025.Abstract INTRODUCTION Down syndrome (DS) is a genetic disorder that leads to intellectual disability and accelerated aging, increasing the risk of Alzheimer's disease (AD). The pathophysiology of AD and DS is multifactorial, involving amyloid precursor protein overexpression, neuroinflammation, and oxidative stress.
Rafaela Gomes dos Reis +4 more
wiley +1 more source
Modeling of the formation of short-chain acids in propane flames [PDF]
arXiv, 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
ChemPlusChem, Volume 90, Issue 5, May 2025.One‐dimensional Pt(II) complexes are known to exhibit significant thermochromic emissions in the crystalline state. This phenomenon offers valuable insights into the excited states of Pt(II) complexes. This review focuses on the thermochromic mechanisms of one‐dimensional Pt(II) and Pd(II) complexes from the viewpoint of the relationship between ...
Masaki Yoshida, Masako Kato
wiley +1 more source
Food Science &Nutrition, Volume 13, Issue 5, May 2025.A significant improvement in hormonal and oxidative stress biomarkers was observed in rats treated with Amaranthus spinosus, especially at high doses, after induction of ovarian hyperthecosis. Amaranthus spinosus could be a management approach for ovarian hyperthecosis via regulating circRNA (hsa‐circ‐0001577), disturbed hormonal balance, and ...
Naglaa M. Ammar +9 more
wiley +1 more source
Discovery Of Copper Catalyst For New Chemical Polishing Acid On Superconducting Niobium [PDF]
arXiv, 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
LC/ESI-MS analysis of underivatized amino acids and mass spectrum [PDF]
arXiv, 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
Correlations of Amino Acids with Secondary Structure Types: Connection with Amino Acid Structure [PDF]
arXiv, 2005 The correlations of primary and secondary structures were analyzed using proteins with known structure from Protein Data Bank. The correlation values of amino acid type and the eight secondary structure types at distant position were calculated for distances between -25 and 25.
arxiv
Redetermination of picolinic acid hydrochloride at 150 K
Acta Crystallographica Section E Structure Reports Online, 2007 The structure of the title compound, C6H6NO2+·Cl−, was previously determined at ambient temperature [Laurent (1965). Acta Cryst. 18, 799–806]. This redetermination at 150 K is to a far higher precision. On cooling to 150 K, the unit cell contracts most in the π–π stacking direction, b, and rather less so in the directions involving the strongly ...
Noelia M. Sanchez-Ballester +2 more
openaire +2 more sources