Results 261 to 270 of about 5,226 (300)

Precipitation Acidity: The Role of the Forest Canopy in Acid Exchange

Journal of Environmental Quality, 1980
AbstractIndividual rain events were sampled above and below the forest canopy in Walker Branch Watershed, Tennessee, from August 1977 to June 1978 for the purpose of analysis of acidity and organic content. Strong acid content correlated with sulfate concentrations.
William A. Hoffman, Steven E. Lindberg, Ralph R. Turner   +2 more
openaire   +1 more source

Amino Acid Exchangeability and the Adaptive Code Hypothesis

Journal of Molecular Evolution, 2007
Since the genetic code first was determined, many have claimed that it is organized adaptively, so as to assign similar codons to similar amino acids. This claim has proved difficult to establish due to the absence of relevant comparative data on alternative primordial codes and of objective measures of amino acid exchangeability.
Stoltzfus, Arlin, Yampolsky, Lev Y.
openaire   +3 more sources

Exchange diffusion in acid-filled gastric pouches

Journal of Surgical Research, 1969
Abstract The reduction of acidity in acid-filled innervated and denervated canine, gastric pouches increased with increasing concentrations of HCl within the lumen. This increasing acidity reduction occurred without an increase in volume, which could be attributed to a non-parietal alkaline secretion entering the lumen.
G K, Wlodek, L, Greenberg, R, Lajzerowicz   +2 more
openaire   +2 more sources

Exchange acidity of montmorillonite and halloysite

Soil Science and Plant Nutrition, 1961
Abstract In the previous article (1), montmorillonitic soils were disclosed to have the ratio of total exchange acidity to y1 less than 3.0 and no ralation of the degree of base saturation to the ratio, although the relation was suggested by AMONINE and WATANABE (2).
openaire   +1 more source

rBAT is an Amino Acid Exchanger with Variable Stoichiometry

Journal of Membrane Biology, 1996
The rBAT protein, when expressed in Xenopus oocytes, was previously shown to reproduce the selectivity of the Na(+)-independent neutral and basic amino acid transport system called bo,+. More recently, the capacity of rBAT to generate a transmembrane current was demonstrated when addition of neutral amino acids stimulated the efflux of cations ...
M J, Coady, X Z, Chen, J Y, Lapointe
openaire   +2 more sources

Ion-exchange chromatographic analysis of peroxynitric acid

Journal of Chromatography A, 2016
Ion-exchange chromatographic analysis of peroxynitric acid (O2NOOH) was performed by combining an acidic eluate with an UV-vis detector and immersing the separation column in an ice-water bath. The decomposition behavior of peroxynitric acid in the solution was also studied using this system.
Yoichi Nakashima, Satoshi Ikawa, Atsushi Tani, Katsuhisa Kitano   +3 more
openaire   +2 more sources

Basicity of Exchangeable Aluminum, Formation of Gibbsite, and Composition of the Exchange Acidity in the Presence of Exchangers

Soil Science Society of America Journal, 1977
Abstract Montmorillonite, vermiculite, and a sulfonic resin were treated with different concentrations of Al(OH) B Cl 3‐ B ...
openaire   +1 more source

Effects of amino acids on sister-chromatid exchanges

Mutation Research/Genetic Toxicology, 1992
The effects of 10 amino acids on sister-chromatid exchange (SCE) frequency in human peripheral blood lymphocytes (PBL) and six amino acids on the SCE frequency in root tip cells of Hordeum vulgare were studied. Alanine (Ala), glycine (Gly), phenylalanine (Phe), valine (Val), histidine (His) and serine (Ser) induced a significant increase in SCE in PBL ...
Z, Zhang, J, Yang
openaire   +2 more sources

PYRUVIC ACID EXCHANGE OF THE BRAIN

Journal of Neurophysiology, 1946
W A, HIMWICH, H E, HIMWICH
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ACID‐BASE BALANCE IN EXCHANGE TRANSFUSION

BJOG: An International Journal of Obstetrics & Gynaecology, 1965
D J, MACRAE, D, PALAVRADJI
openaire   +2 more sources