Results 11 to 20 of about 1,767,737 (317)

Depolymerization of High Molecular Weight into a Predicted Low Molecular Weight Chitosan and Determination of the Degree of Deacetylation Coupled with Other Tests to Guarantee its Quality for Research Use

open access: yesJournal of Excipients and Food Chemicals, 2018
Low molecular weight chitosan (LMWC) is a semi synthetic biopolymer with potential uses as a pharmaceutical excipient, though, consistent and reliable grades of pure LMWC are scarce.
Adnan Badwan   +4 more
doaj   +1 more source

Molecular-Weight-Dependent Infiltration and Adsorption of Polymers into Nanochannels

open access: yes, 2023
The mesoporous silica shell coating hydrogenolysis nano-catalysts alters the molecular weight distributions of cleaved polymer chains compared to catalysts without a shell. The shell, composed of radially aligned narrow cylindrical nanopores, reduces the
Max Meirow (14500144)   +7 more
core   +1 more source

High and low molecular weight crossovers in the longest relaxation time dependence of linear cis-1,4 polyisoprene by dielectric relaxations [PDF]

open access: yes, 2010
The dielectric relaxation of cis-1,4 Polyisoprene [PI] is sensitive not only to the local and segmental dynamics but also to the larger scale chain (end-to-end) fluctuations.
Alegría, Angel   +4 more
core   +1 more source

Effect of Microwave Plasma Pre-Treatment on Cotton Cellulose Dissolution

open access: yesMolecules, 2022
The utilization of cellulose to its full potential is constrained by its recalcitrance to dissolution resulting from the rigidity of polymeric chains, high crystallinity, high molecular weight, and extensive intra- and intermolecular hydrogen bonding ...
Shaida S. Rumi   +3 more
doaj   +1 more source

Structure-Functional Activity Relationship of β-Glucans From the Perspective of Immunomodulation: A Mini-Review

open access: yesFrontiers in Immunology, 2020
β-Glucans are a heterogeneous group of glucose polymers with a common structure comprising a main chain of β-(1,3) and/or β-(1,4)-glucopyranosyl units, along with side chains with various branches and lengths.
Biao Han   +5 more
doaj   +1 more source

Antimicrobial activities of low molecular weight polymers synthesized through soap-free emulsion polymerization [PDF]

open access: yes, 2018
To evaluate the influence of low molecular weight polymers synthesized through soap-free emulsion polymerization on the indicator microorganism, Micrococcus luteus, methyl methacrylate (MMA) and styrene were polymerized by using various initiators.
Takahashi, Yuya   +3 more
core   +1 more source

Molecular Weight of Melanin [PDF]

open access: yesNature, 1947
A METHOD of obtaining protein macro-molecules in crystalline form by the use of heparin has been described by Cohen1. As melanin is generally believed to have a high molecular weight, an attempt has been made to crystallize it by Cohen's method, using ethylene chlorhydrin as solvent.
openaire   +2 more sources

Star Ultrahigh-Molecular-Weight Polyethylene

open access: yes, 2023
Star polymers have attracted immense interest from scientific and industrial communities due to their unique properties relative to linear polymers; however, the synthesis of the long-sought star polyolefins remains highly challenging because of the lack
Shilong Wu (5400815)   +4 more
core   +2 more sources

THE MOLECULAR WEIGHT OF ANTIBODIES [PDF]

open access: yesJournal of Experimental Medicine, 1939
1. Highly purified preparations of homogeneous antibody can be made by the salt dissociation methods (6, 7) without any change in sedimentation due to the method of purification. 2. Antibodies prepared from sera of various animal species fall into two groups as regards molecular weight; in one group cow, horse, and pig, a heavy molecule ...
openaire   +2 more sources

Variations of low-molecular-weight and total pyrogenic PAHs (LMW/Total pyrogenic PAHs), high-molecular-weight (HMW), and low-molecular-weight (LMW) PAHs with comparison to the charcoal abundance (5-point moving mean).

open access: yes, 2021
Variations of low-molecular-weight and total pyrogenic PAHs (LMW/Total pyrogenic PAHs), high-molecular-weight (HMW), and low-molecular-weight (LMW) PAHs with comparison to the charcoal abundance (5-point moving mean).
Norhayati Mohd Tahir (11408657)   +7 more
core   +1 more source

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