Results 21 to 30 of about 1,678,407 (282)

The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin

open access: yesGeosciences, 2022
The origin of hydrogen–hydrocarbon gases present in the rocks of the Khibiny massif in unusually high concentrations has been the subject of many years of discussion.
Valentin A. Nivin   +3 more
doaj   +1 more source

Seasonal Changes in Qualitative and Quantitative Characteristics of Humic Substances in Waters of Different Genesis: Membrane Technologies and Equilibrium Processes

open access: yesMembranes, 2023
Membrane filtration methods were applied in this study to research natural waters specification (and speciation). Lysimetric waters (soil waters) of background territories in different seasons are considered.
Marina Dinu
doaj   +1 more source

The theoretical molecular weight of NaYF ₄ :RE upconversion nanoparticles [PDF]

open access: yes, 2018
Upconversion nanoparticles (UCNPs) are utilized extensively for biomedical imaging, sensing, and therapeutic applications, yet the molecular weight of UCNPs has not previously been reported. Herein, we present a theory based upon the crystal structure of
Goode, JA   +6 more
core   +1 more source

Effect of Molecular Structure of Oil on the Film Thickness during Rolling

open access: yesTribology Online, 2009
In recent years, metal working oil is required to have lower viscosity and higher lubricity than ever. Controlling oil film thickness is one of the most important in metal working.
Takamichi Watanabe, Yasuhiro Hosomi
doaj   +1 more source

General route to design polymer molecular weight distributions through flow chemistry

open access: yesNature Communications, 2020
The properties of a polymer are known to be intrinsically related to its molecular weight distribution. Here the authors use a design to synthesis protocol for producing a targeted molecular weight distribution with a computer controlled tubular flow ...
Dylan J. Walsh   +3 more
doaj   +1 more source

Evaluation of Molecular Weight Distribution of Sericin in Solutions Concentrated via Precipitation by Ethanol and Precipitation by Freezing/Thawing

open access: yesChemical Engineering Transactions, 2014
Sericin is a globular water-soluble protein that constitutes 25 to 30 % of silk proteins weight in silkworm`s cocoons. This protein envelopes silk fibers gluing them and ensuring the cohesion of the cocoon.
T.L. Da Silva   +5 more
doaj   +1 more source

The molecular-weight distribution of glycosaminoglycans [PDF]

open access: yesBiochemical Journal, 1973
1. A rapid and sensitive method for the accurate estimation of the molecular-weight distribution of keratan sulphate and chondroitin sulphate isolated from adult bovine nasal septum and intervertebral disc is described. The method utilizes gel chromatography of reductively labelled glycosaminoglycan and end-group estimation of number-average molecular ...
J J, Hopwood, H C, Robinson
openaire   +2 more sources

Size-tuneable nanometric MRI contrast agents for the imaging of molecular weight dependent transport processes [PDF]

open access: yes, 2014
Purpose: To evaluate size-tuneable nanomeric glycol-chitosan-DTPA-Gd conjugates as MRI contrast agents for the imaging of molecular weight (MW) dependent transport processes.
Condon, Barrie   +6 more
core   +1 more source

Polydispersity-induced macrophase separation in diblock copolymer melts [PDF]

open access: yes, 2007
The effect of A-block polydispersity on the phase behavior of AB diblock copolymer melts is examined using a complete self-consistent field theory treatment that allows for fractionation of the parent molecular-weight distribution.
Matsen, Mark W.
core   +1 more source

Light Scattering of High Polymer Solutions [PDF]

open access: yes, 1946
In principle it is possible to determine the molecular weight distribution of a high polymer, containing no excessively large molecules, from interpretation of its light scattering in solutions at various concentrations.
Badger, Richard M.   +2 more
core   +1 more source

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