Ionization fraction and the enhanced sulfur chemistry in Barnard 1 [PDF]
Astronomy & Astrophysics, 2016 Paper accepted in Astronomy and Astrophysics; 28 pags, 21 ...
Fuente, A. +9 more
semanticscholar +13 more sources
On the Ionisation Fraction in Protoplanetary Disks II: The Effect of Turbulent Mixing on Gas--phase Chemistry [PDF]
, 2005 We calculate the ionisation fraction in protostellar disk models using two different gas-phase chemical networks, and examine the effect of turbulent mixing by modelling the diffusion of chemical species vertically through the disk.
M. Ilgner, Richard P. Nelson
semanticscholar +10 more sources
Isolation, characterization, and surface chemistry of a surface-active fraction from dog lung
Journal of Lipid Research, 1970 A procedure is described for the isolation of a surface-active fraction from dog lung. This material meets the established criteria for pulmonary surfactant. The fraction was shown to contain lipid, protein, and carbohydrate.
M.F. FROSOLONO +3 more
doaj +3 more sources
Nitrogen fractionation in ammonia and its insights into nitrogen chemistry [PDF]
Astronomy & Astrophysics, 2023 Context. Observations of the nitrogen isotopic ratio 14N/15N in the interstellar medium are becoming more frequent thanks to increased telescope capabilities. However, interpreting these data is still puzzling. In particular, measurements of 14N/15N in diazenylium have revealed high levels of anti-fractionation in cold cores, which is challenging to ...
E. Redaelli +3 more
openalex +4 more sources
Mass independent isotopic fractionation: A key to plasma chemistry
SSRN Electronic Journal, 2022 We propose a numerical model allowing to calculate the relative variations of isotopic ratios involved in a mass-independent isotopic fractionation (MIF) effect. This model is derived from classical trajectory simulation performed to reproduce the reactions yielding the isotopomers of ozone.
François Robert, Peter Reinhardt
+7 more sources
Superheater ash deposit ageing – Impact of melt fraction on morphology and chemistry
Fuel, 2023 The initial melting behaviour of synthetic ash deposits, with a focus on how the amount of melt formed, affects the final deposit morphology, was studied. Binary and ternary reciprocal deposits were exposed to a temperature gradient with varying exposure time, steel temperature, and furnace temperature.
Roland Balint +4 more
+4 more sources
Photoselective isotope fractionation dynamics in cosmo and atmospheric chemistry [PDF]
Abstract Photochemical isotope effects have been measured for nearly 50 years with the driving force being the understanding of natural processes. This has ranged from climate and atmospheric chemistry and dynamics, planetary atmospheres such as Mars, Titan and Jupiter, consequences for resolving solar system formation mechanisms, interstellar ...
R. D. Levine
openalex +2 more sources
The chemistry of the collagen cross-links. The characterization of Fraction C, a possible artifact produced during the reduction of collagen fibres with borohydride [PDF]
Biochemical Journal, 1973 Simon P. Robins, Allen J. Bailey
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Geochemistry: Exploration, Environment, Analysis, 2023 Stream sediment surveys support early-stage reconnaissance mineral exploration and regional assessment programs, enhanced by recent improvements in analytical method detection limits, continuously improving mineral chemistry, and new approaches to the ...
Mary E. Doherty +4 more
semanticscholar +1 more source
Frontiers in Nutrition, 2023 Accurately determining the macronutrient profile of mare milk is a precursor to studying how milk composition affects foals’ growth and development. This study optimized and validated an extraction and quantification method for mare milk oligosaccharides,
Morgan B. Pyles +3 more
doaj +1 more source