Results 211 to 220 of about 36,604 (265)
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Carbohydrate Polymers, 2013
Differently modified xanthans, varying in degree of acetylation and/or pyruvylation were incubated with the experimental cellulase mixture C1-G1 from Myceliophthora thermophila C1. The ionic strength and/or temperature of the xanthan solutions were varied, to obtain different xanthan conformations.
Henk A Schols +2 more
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Differently modified xanthans, varying in degree of acetylation and/or pyruvylation were incubated with the experimental cellulase mixture C1-G1 from Myceliophthora thermophila C1. The ionic strength and/or temperature of the xanthan solutions were varied, to obtain different xanthan conformations.
Henk A Schols +2 more
exaly +3 more sources
Role of conformation and acetylation of xanthan on xanthan-guar interaction
Carbohydrate Polymers, 1992Abstract The synergistic effect obtained by mixing xanthan and guar solutions were examined by low shear viscosity measurements in relation to the temperature. Native and deacetylated xanthan samples were used in mixtures in which the total polymer concentrations were 1 g/litre and 0·5 g/litre.
Lopes, L. +3 more
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Food Hydrocolloids, 2003
Abstract Xanthan solutions have gel-like properties, including the ability to hold particles in suspension, but the network structure breaks down readily, allowing the solutions to flow freely. These ‘weak gel’ properties are attributed to tenuous association of ordered chains, and are enhanced by cations, particularly Ca2+.
P. Giannouli, E.R. Morris
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Abstract Xanthan solutions have gel-like properties, including the ability to hold particles in suspension, but the network structure breaks down readily, allowing the solutions to flow freely. These ‘weak gel’ properties are attributed to tenuous association of ordered chains, and are enhanced by cations, particularly Ca2+.
P. Giannouli, E.R. Morris
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Multistranded Helix in Xanthan Polysaccharide
Science, 1977The extracellular polysaccharide xanthan is shown by electron microscopy to be an unbranched, probably double-stranded fiber 4 nanometers wide and 2 to 10 micrometers long when native. Denaturation yields a single strand only 2 nanometers wide and 0.3 to 1.8 micrometers long.
G, Holzwarth, E B, Prestridge
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Immune responses to xanthan gum I. The characteristics of lymphocyte activation by xanthan gum
European Journal of Immunology, 1983AbstractXanthan gum (XG), a microbial polysaccharide produced extracellularly by fermentation of Xanthomonas campestris, has unique physical properties. We studied the effects of XG on murine lymphocytes in vitro and found that XG induced both a significant increase of DNA synthesis in mouse splenic B cells and thymocytes as well as polyclonal IgM and ...
S, Ishizaka +4 more
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Carbohydrate Polymers, 2014
Xanthans occurring in different levels of disordered conformation were enzymatically hydrolyzed to their six pentamer repeating units (RUs). The RUs present in the enzyme digests were analyzed using LC-MS. As only disordered xanthan segments are degraded by cellulases, the influence of the six different RUs on the transitional behavior of xanthan could
Kool, M.M. +3 more
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Xanthans occurring in different levels of disordered conformation were enzymatically hydrolyzed to their six pentamer repeating units (RUs). The RUs present in the enzyme digests were analyzed using LC-MS. As only disordered xanthan segments are degraded by cellulases, the influence of the six different RUs on the transitional behavior of xanthan could
Kool, M.M. +3 more
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Behaviour of xanthan in cadoxen
Carbohydrate Polymers, 1990Abstract The stability of xanthan versus time in cadoxen at 20°C has been studied using optical rotation, viscosimetry and light scattering. For xanthan samples with a high initial molecular weight, the relative and the intrinsic viscosities, the weight average molecular weight and the radius of gyration of the samples continuously decrease with time.
Milas, M., Tinland, B.
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Plasma enhanced modification of xanthan and its use in chitosan/xanthan hydrogels
Polymer Engineering & Science, 2013This study reports the design and construction of a fluidized bed/non‐equilibrium atmospheric‐pressure‐plasma reactor. The mechanical design of the reactor was devised to modify chemically and physically the surface of different powders. The basis for developing the design and construction of the reaction system were the non‐equilibrium atmospheric ...
A.J. Martínez‐Gómez +4 more
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Phase and rheological behaviors of xanthan/amylose and xanthan/starch mixed systems
Carbohydrate Polymers, 2004Phase separation and rheological properties of wheat starch (2 wt%) or amylose (0.3 wt%) with xanthan (0.1 or 0.5 wt%) mixtures were investigated at two salt levels (less than 0.01 M equivalent NaCl and 0.1 M NaCl). Mixed systems were prepared with pre-heated solutions and/or dispersions.
Mandala, I, Michon, Camille, Launay, B
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Kinetics of the xanthan fermentation
Biotechnology and Bioengineering, 1973AbstractXanthan gum, a heteropolysaccharide with unusual and useful properties, is now produced commercially by fermentation with Xanthomonas compestris NRRL B–1459 in a medium containing glucose, minerals, and a complex nitrogen source—distillers' dried solubles (DDS).
R. A. Moraine, P. Rogovin
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