Results 61 to 70 of about 6,586 (225)
Carbon Doping of MgB2 by Toluene and Malic-Acid-in-Toluene [PDF]
, 2010 The decomposition of malic acid in the presence of Mg and B was studied using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) which revealed that malic acid reacted with Mg but not B. Also, the addition of toluene to dissolve malic acid followed by subsequent drying resulted in no reaction with Mg, indicating that the malic
arxiv +1 more source
Journal of Obstetrics and Gynaecology Research, Volume 50, Issue 9, Page 1439-1458, September 2024.Abstract Objective We aim to assess the efficacy of prophylactic tranexamic acid (TXA) in reducing blood loss after cesarean section (CS). Methods We systematically searched PubMed and Embase for randomized controlled trials published between 1990 and 2023 to conduct a meta‐analysis on adult women undergoing CS and receiving prophylactic TXA.
Ammar Al Naimi +4 more
wiley +1 more source
A search for mid-IR bands of amino acids in the Perseus Molecular Cloud [PDF]
arXiv, 2021 Amino acids are building-blocks of proteins, basic constituents of all organisms and essential to life on Earth. They are present in carbonaceous chondrite meteorites and comets, but their origin is still unknown. Formation of amino acids in the interstellar medium is posible via specific gas-phase reactions in dark clouds, however sensitive ...
arxiv
Large presence of carbonic acid in CO$_2$-rich aqueous fluids under Earth's mantle conditions [PDF]
Journal of Physical Chemistry Letters 10, 5135-5141 (2019), 2019 The chemistry of carbon in aqueous fluids at extreme pressure and temperature conditions is of great importance to Earth's deep carbon cycle, which substantially affects the carbon budget at Earth's surface and global climate change. At ambient conditions, the concentration of carbonic acid in water is negligible, so aqueous carbonic acid was simply ...
arxiv +1 more source
Quercetin induces a slow myofiber phenotype in engineered human skeletal muscle tissues
The FASEB Journal, Volume 38, Issue 16, 31 August 2024.Quercetin, a polyphenol found in various fruits and vegetables, could play a crucial role in muscle differentiation. Specifically, it appears to promote the development and function of slow myofibers in human skeletal muscle cells. This could have far‐reaching implications, particularly for dietary and therapeutic strategies aimed at enhancing muscle ...
Akitoshi Nagai +5 more
wiley +1 more source
Acid zeta function and ajoint acid zeta function [PDF]
arXiv, 2010 In this paper we set up the theory of acid zeta function and ajoint acid zeta function, based on the theory, we point out a reason to doubt the truth of the Riemann hypothesis and also as a consequence, we give out some new RH equivalences.
arxiv
Exploring helix structures of γ‐peptides based on 2‐(aminomethyl)cyclopentanecarboxylic acid
Biopolymers, Volume 115, Issue 3, May 2024.Abstract Conformational search and density functional theory calculations were performed to explore the preferences of helical structures for chiro‐specific oligo‐γ‐peptides of 2‐(aminomethyl)cyclopentanecarboxylic acid (γAmc5) with a cyclopentyl constraint on the Cα–Cβ bond in solution.
Hae Sook Park +2 more
wiley +1 more source
Is Amino-Acid Homochirality Due To Asymmetric Photolysis In Space? [PDF]
arXiv, 1999 Amino acids occurring in proteins are, with rare exceptions, exclusively of the L-configuration. Among the many scenarios put forward to explain the origin of this chiral homogeneity (i.e., homochirality), one involves the asymmetric photolysis of amino acids present in space, triggered by circularly polarized UV radiation.
arxiv
Organoseleno cytostatic derivatives: autophagic cell death with AMPK and JNK activation [PDF]
, 2019 Selenocyanates and diselenides are potential antitumor agents. Here we report two series of selenium derivatives related to selenocyanates and diselenides containing carboxylic, amide and imide moieties.
Encío Martínez, Ignacio +4 more
core +1 more source
Are Strong Bronsted Acids Necessarily Strong Lewis Acids? [PDF]
arXiv, 2006 The Broensted and Lowry acid base theory is based on the capacity of proton donation or acceptance (in the presence or absence of a solvent) whereas the Lewis acid base theory is based on the propensity of electron pair acceptance or donation. We explore through DFT calculation the obvious question whether these two theories are in conformity with each
arxiv