Results 51 to 60 of about 4,986,391 (226)

Impact of Methods of Preparation on Mechanical Properties, Dissolution Behavior, and Tableting Characteristics of Ibuprofen‐Loaded Amorphous Solid Dispersions

open access: yesAdvances in Pharmacological and Pharmaceutical Sciences, Volume 2024, Issue 1, 2024.
This study aims to improve the biopharmaceutical, mechanical, and tableting properties of a poorly soluble drug, ibuprofen (IBP), by preparing amorphous solid dispersion (ASD) followed by a sustained‐release tablet formulation. A suitable polymer to develop an ASD system was chosen by utilizing the apparent solubility of IBP in various polymer ...
Ajam Uddin   +8 more
wiley   +1 more source

Acid zeta function and ajoint acid zeta function [PDF]

open access: yesarXiv, 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  

Is Amino-Acid Homochirality Due To Asymmetric Photolysis In Space? [PDF]

open access: yesarXiv, 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  

Comparative Characteristics of Polymethacrylic Acid Hydrogel Sorption Activity in Relation to Lanthanum Ions in Different Intergel Systems [PDF]

open access: bronze, 2022
Т. K. Jumadilov   +9 more
openalex   +1 more source

Cytochrome b in Neurospora crassa Mitochondria

open access: yes, 1974
Cytochrome b was purified from Neurospora crassa mitochondria by means of chromatography on oleyl-polymethacrylic acid resin, chromatography on DEAE-cellulose and recycling gel filtration on Sephadex G-75, all steps being performed in a medium containing
H. Weiss, B. Ziganke
semanticscholar   +1 more source

Are Strong Bronsted Acids Necessarily Strong Lewis Acids? [PDF]

open access: yesarXiv, 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  

The Factors of the Classification of Protein Amino Acids [PDF]

open access: yesThis paper is published in GLASNIK of Montenegrin Academy of Science and arts, 2000, 13, pp. 173-194, 2006
In this work it is shown that three pairs of the factors appear to be the key, i.e. main factors of a natural classification of protein (canonical) amino acids within the amino acid (genetic) code. First pair: the factors of the habit of an amino acid molecule (size and polarity).
arxiv  

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  

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