scholarly journals High Yielding Acid‐Catalysed Hydrolysis of Cellulosic Polysaccharides and Native Biomass into Low Molecular Weight Sugars in Mixed Ionic Liquid Systems

ChemistryOpen ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1316-1324 ◽  
Author(s):  
Iurii Bodachivskyi ◽  
Unnikrishnan Kuzhiumparambil ◽  
D. Bradley G. Williams
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Low Molecular Weight ◽  
Liquid Systems ◽  
Hydrolysis Of

scholarly journals An Improved Procedure for the Preparation of Thrombin Low Molecular Weight Substrates - Peptide p-Nitroanilides

2018 ◽  
Vol 1 (4) ◽  
pp. e00057 ◽  
Author(s):  
A.A Chistov ◽  
A.V. Talanova ◽  
M.V. Melnikova ◽  
S.S. Kuznetsova ◽  
E.F. Kolesanova
Keyword(s):  
Molecular Weight ◽  
Solid Phase ◽  
Solid Phase Peptide Synthesis ◽  
Potassium Sulfate ◽  
Polymer Support ◽  
Low Molecular Weight ◽  
Chromogenic Substrate ◽  
Peptide Substrates ◽  
Terminal Amino ◽  
Hydrolysis Of

Low molecular weight chromogenic thrombin peptide substrates, p-nitroanilides of short peptides protected at their N-terminal amino group, were prepared by solid-phase peptide synthesis on polystyrene-divinylbenzene polymer with trityl groups with preliminary attached p-phenylene diamine moiety. After the cleavage from the resin peptide p-aminoanilides were mildly oxidized to p-nitroanilides with the mixture of potassium sulfate and persulfate. Adsorption onto polymer support Bio-Beads SM-2 with further elution by acetonitrile allowed easy separating peptide p-nitroanilides from the oxidizer and obtaining the thrombin chromogenic substrate preparations with the target substance contents of not less than 95% and yields of 30-40%. Thrombin effectively catalyzed hydrolysis of the prepared substrates with KM and Vmax values of 29-134 mM and 0.03-1/16 mM/s, respectively.

scholarly journals Biodegradation of low molecular weight polyacrylamide under aerobic and anaerobic conditions: effect of the molecular weight

2020 ◽  
Vol 81 (2) ◽  
pp. 301-308 ◽  
Author(s):  
Wenzhe Song ◽  
Yu Zhang ◽  
Amir Hossein Hamidian ◽  
Min Yang
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Carbon Chain ◽  
Anaerobic Treatment ◽  
Low Molecular Weight ◽  
Amino Groups ◽  
Molecular Weights ◽  
Weight One ◽  
Hydrolysis Of ◽  
Aerobic And Anaerobic

Abstract The biodegradation of polyacrylamide (PAM) includes the hydrolysis of amino groups and cleavage of the carbon chain; however, the effect of molecular weight on the biodegradation needs further investigations. In this study, biodegradation of low molecular weight PAM (1.6 × 106 Da) was evaluated in two aerobic (25 °C and 40 °C) and two anaerobic (35 °C and 55 °C) reactors over 100 days. The removal of the low molecular weight PAM (52.0–52.6%) through the hydrolysis of amino groups by anaerobic treatment (35 °C and 55 °C) was much higher than that of the high molecular weight (2.2 × 107 Da, 11.2–17.0%) observed under the same conditions. The molecular weight was reduced from 1.6 × 106 to 6.45–7.42 × 105 Da for the low molecular weight PAM, while the high molecular weight PAM declined from 2.2 × 107 to 3.76–5.87 × 106 Da. The results showed that the amino hydrolysis of low molecular weight PAM is easier than that of the high molecular weight one, while the cleavage of its carbon chain is still difficult. The molecular weights of PAM in the effluents from the two aerobic reactors (25 °C and 40 °C) were further reduced to 4.31 × 105 and 5.68 × 105 Da by the biofilm treatment, respectively. The results would be useful for the management of wastewater containing PAM.

Detection of cellulase inhibitor in the wheat bran culture of Aspergillus terreus

1981 ◽  
Vol 27 (12) ◽  
pp. 1334-1340 ◽  
Author(s):  
S. N. Sinha ◽  
B. L. Ghosh ◽  
S. N. Ghose
Keyword(s):  
Molecular Weight ◽  
Wheat Bran ◽  
Filter Paper ◽  
Aspergillus Terreus ◽  
Defined Medium ◽  
Low Molecular Weight ◽  
Chemically Defined Medium ◽  
Plant Origin ◽  
First Time ◽  
Hydrolysis Of

The presence of a cellulase inhibitor in the wheat bran culture of a fungus is reported for the first time. The inhibitor has a low molecular weight and is relatively stable to heat. It is absent from wheat bran and is not produced in a chemically defined medium. Unlike cellulase inhibitors of plant origin, this inhibitor is not a polyphenol. It inhibits the hydrolysis of cotton to a greater degree than that of filter paper or carboxymethylcellulose. In addition to inhibiting Aspergillus terreus cellulase, it also inhibits a variety of commercial cellulases.

scholarly journals Study on the Dynamic Behavior of Ionic Species in a Gel Formed by a Low Molecular Weight Gelator and an Ionic Liquid

2009 ◽  
Vol 66 (7) ◽  
pp. 266-271 ◽  
Author(s):  
Toshihiro TAKEKAWA ◽  
Hidenori SATO ◽  
Kazuhiro KAMIGUCHI ◽  
Kenji HANABUSA
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Dynamic Behavior ◽  
Ionic Species ◽  
Low Molecular Weight ◽  
Low Molecular Weight Gelator

Temperature‐Responsive Low Molecular Weight Ionic Liquid Based Gelator: An Approach to Fabricate an Anti‐Cancer Drug‐Loaded Hybrid Ionogel

2020 ◽  
Vol 2 (5) ◽  
Author(s):  
Muzammil Kuddushi ◽  
Nehal K. Patel ◽  
Sargam Rajput ◽  
Omar A. El Seoud ◽  
Jitendra P. Mata ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Cancer Drug ◽  
Low Molecular Weight ◽  
Temperature Responsive ◽  
Anti Cancer
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