Results 181 to 190 of about 19,124 (242)

Xylan-degrading activity in yeasts: Growth on xylose, xylan and hemicelluloses

Folia Microbiologica, 1978
The ability to grow in liquid media with D-xylose, xylan from decidous trees, and hemicelluloses from conifers was tested in 95 strains of 35 genera of yeasts and yeast-like organisms. Of 54 strains thriving on xylose, only 13 (genera Aureobasidium, Cryptococcus and Trichosporon) utilized xylan and hemicelluloses as growth substrates.
P, Biely, Z, Krátký, A, Kocková-Kratochvílová, S, Bauer   +3 more
openaire   +2 more sources

Xylan and xylan derivatives – biopolymers with valuable properties, 1. Naturally occurring xylans structures, isolation procedures and properties

Macromolecular Rapid Communications, 2000
The availability of xylan-type polysaccharides, representing an immense resource of biopolymers for practical application, is summarized. Xylans constitute 25–35% of the dry biomass of woody tissues of dicots and lignified tissues of monocots and occur up to 50% in some tissues of cereal grains.
A. Ebringerová, T. Heinze
semanticscholar   +2 more sources

Kinetic method for the study of xylan hydrolysis by xylan hydrolases

Monatshefte f�r Chemie Chemical Monthly, 1989
The Somogyi-Nelson colorimetric method was used in a new manner more suitable for evaluating the kinetics of the enzyme hydrolysis of xylan catalyzed by xylan hydrolases. The values of the Michaelis parameters (Km=5.56 g l−1 andV=2.94 · 10−5M s−1) were determined.
Nadka G. Bakalova, Methodi L. Chetkarov, Todor K. Nikolov, Dimiter N. Kolev   +3 more
openaire   +1 more source

Enzymatic Hydrolysis of Xylan

Nature, 1953
A PREVIOUS investigation1 has shown that enzymes from Chœtomium globosum are able to hydrolyse wheat straw xylan to xylose with the formation of a series of intermediates, designated a,b,c, … g, which appear on paper-chromatograms with regularly decreasing RF-values, and which are believed to be oligosaccharides with regularly increasing xylose units ...
openaire   +2 more sources

Role of Hydrogen Bonding in the Interaction between a Xylan Binding Module and Xylan

Biochemistry, 2001
NMR studies of the internal family 2b carbohydrate binding module (CBM2b-1) of Cellulomonas fimi xylanase 11A have identified six polar residues and two aromatic residues that interact with its target ligand, xylan. To investigate the importance of the various interactions, free energy and enthalpy changes have been measured for the binding of xylan to
H, Xie, D N, Bolam, T, Nagy, L, Szabó, A, Cooper, P J, Simpson, J H, Lakey, M P, Williamson, H J, Gilbert   +8 more
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Xylan and Xylan Derivatives – Basis of Functional Polymers for the Future

2011
This review highlights xylan and xylan derivatives. It depicts the occurrence and structural diversity of the biopolymer, followed by a presentation of different ways of isolation from biomass. The determination of characteristics, i.e., molecular weight, interaction with other polysaccharides, thermal behaviour, and the biological activity of xylan ...
Thomas Heinze, Stephan Daus
openaire   +1 more source

Xylan and xylan derivatives—Their performance in bio-based films and effect of glycerol addition

Industrial Crops and Products, 2016
Abstract In this work, the successful derivatization of a beechwood xylan (BX) by carboxymethylation and hydroxypropylation was achieved aimed to produce bio-based films. Carboxymethyl xylan (CMX) and hydroxypropyl xylan (HPX) with a substitution degree of 0.3 and 1.1, respectively, as determined by 1H NMR, were synthesised.
Sónia Sousa, Ana Ramos, Dmitry V. Evtuguin, José A.F. Gamelas   +3 more
openaire   +3 more sources

Conformational analysis of xylan chains

Carbohydrate Research, 2005
The present study provides a theoretical description of the different levels of structural organization that characterize the xylan polysaccharide in its native and hydrophobic lauroyl esterified forms. The goal of this study was to ascertain the role played by the hydroxyl or lauroyl side groups on the conformational flexibility of the xylan chain ...
Mazeau, Karim, Moine, Charlotte, Krausz, Pierre, Gloaguen, Vincent   +3 more
openaire   +3 more sources

Crystallization and water cast film formability of birchwood xylans

Cellulose, 2023
Mingquan Zhang, Qianlong Li, A. Kazachenko, Zhouyang Xiang   +3 more
semanticscholar   +1 more source

Xylan of Siphonaceous Green Algae

Nature, 1960
COMPARATIVELY little is known at present about the chemical nature of the cell wall constituents of siphonous green algae, especially that of the non-septate groups. Although the cell wall of the algae belonging to Bryopsidaceae, Caulerpaceae and Codiaceae has been stated to consist for the most part of callose (a name given originally to a ...
Y, IRIKI, T, SUZUKI, K, NISIZAWA, T, MIWA   +3 more
openaire   +2 more sources