Results 21 to 30 of about 774,640 (308)

Molecular Weight Distribution of Proteins [PDF]

open access: yesNature, 1946
THE recent publication1 of an examination of Svedberg's theory of molecular weight distribution, in which the theory is considered to be invalid, suggests that a treatment, similar in some of its details, might be of interest. This was prepared in 19442, and the conclusions agree with those of Johnston, Longuet-Higgins and Ogston1, and with those of ...
openaire   +2 more sources

The application of HP-GFC chromatographic method for the analysis of oligosaccharides in bioactive complexes [PDF]

open access: yesHemijska Industrija, 2009
The aim of this work was to optimize a GFC method for the analysis of bioactive metal (Cu, Co and Fe) complexes with olygosaccharides (dextran and pullulan). Bioactive metal complexes with olygosaccharides were synthesized by original procedure.
Savić Ivan   +3 more
doaj   +1 more source

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

Molecular Weight Distribution of Kerogen with MALDI-TOF-MS

open access: yes, 2020
Kerogen is an amorphous organic matter (AOM) in fine grain sediments, which produces petroleum and other byproducts when subjected to adequate pressure and temperature (deep burial conditions).
Hyeonseok, Lee   +4 more
core   +1 more source

In vitro synthesis of heparosan using recombinant Pasteurella multocida heparosan synthase PmHS2 [PDF]

open access: yes, 2009
In vertebrates and bacteria, heparosan the precursor of heparin is synthesized by glycosyltransferases via the stepwise addition of UDP-N-acetylglucosamine and UDP-glucuronic acid.
Kooy, F.K.   +9 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

Molecular weight distribution of polysiloxanes produced via protocol 1.

open access: yes, 2022
Ring-opening polymerization following “protocol 1” produced polysilioxanes with bimodal distribution. These two peaks can be separated by distillation under reduced pressure with a high molecular weight peak (Mp ~ 9,400 g/mol) and a low molecular weight ...
Roberto Laos (1928638)   +1 more
core   +1 more source

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