scholarly journals Structural Characterization of the Released Polysaccharide of Desiccation-Tolerant Nostoc communeDRH-1

2000 ◽  
Vol 182 (4) ◽  
pp. 974-982 ◽  
Author(s):  
Richard F. Helm ◽  
Zebo Huang ◽  
Devin Edwards ◽  
Heidi Leeson ◽  
William Peery ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Structural Characterization ◽  
Uronic Acid ◽  
Glucuronic Acid ◽  
Extracellular Polysaccharide ◽  
Spectroscopic Methods ◽  
Nostoc Commune ◽  
Geographic Locations ◽  
Released Polysaccharide

ABSTRACT The structure of the viscous extracellular polysaccharide (glycan) of desiccation-tolerant Nostoc commune DRH-1 was determined through chromatographic and spectroscopic methods. The polysaccharide is novel in that it possesses a 1-4-linked xylogalactoglucan backbone with d-ribofuranose and 3-O-[(R)-1-carboxyethyl]-d-glucuronic acid (nosturonic acid) pendant groups. The presence ofd-ribose and nosturonic acid as peripheral groups is unusual, and their potential roles in modulating the rheological properties of the glycan are discussed. Nosturonic acid was present in the glycans of N. commune from diverse geographic locations, suggesting that this uronic acid is an integral component of this cosmopolitan anhydrophile.

scholarly journals Structural Characterization of the Extracellular Polysaccharide from Vibrio cholerae O1 El-Tor

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e86751 ◽  
Author(s):  
Fitnat Yildiz ◽  
Jiunn Fong ◽  
Irina Sadovskaya ◽  
Thierry Grard ◽  
Evgeny Vinogradov
Keyword(s):  
Vibrio Cholerae ◽  
Structural Characterization ◽  
Extracellular Polysaccharide ◽  
Vibrio Cholerae O1 ◽  
El Tor

Characterization of a mucoid Escherichia coli K12 strain, and chemical analysis of the exopolysaccharide

1972 ◽  
Vol 18 (7) ◽  
pp. 969-973 ◽  
Author(s):  
Stephen Shugar ◽  
Kenneth E. Sanderson
Keyword(s):  
Escherichia Coli ◽  
Chemical Analysis ◽  
Glucuronic Acid ◽  
Extracellular Polysaccharide ◽  
Spontaneous Mutant ◽  
Escherichia Coli K12 ◽  
Molar Ratios ◽  
Genetic Lesion ◽  
Long Form

A spontaneous mutant of Escherichia coli K12 C600 was isolated which is mucoid as a result of overproduction of an extracellular polysaccharide. This strain also forms filaments, is sensitive to ultraviolet irradiation, and has its genetic lesion closely linked to the lac gene. Its phenotype and map position are analogous to the lon mutation (long form). The exopolysaccharide contains fucose, glucose, galactose, and may contain glucuronic acid, but the molar ratios of these sugars differ from those previously reported.

Structural characterization of the extracellular polysaccharide produced by Bifidobacterium longum JBL05

2009 ◽  
Vol 77 (2) ◽  
pp. 351-357 ◽  
Author(s):  
Mamiko Kohno ◽  
Shiho Suzuki ◽  
Tadashi Kanaya ◽  
Tomoe Yoshino ◽  
Youichi Matsuura ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Bifidobacterium Longum ◽  
Extracellular Polysaccharide

scholarly journals Synthesis and Structural Characterization of Amidine, Amide, Urea and Isocyanate Derivatives of the Amino-closo-dodecaborate Anion [B12H11NH3]−

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3137 ◽  
Author(s):  
Yuanbin Zhang ◽  
Yuji Sun ◽  
Tao Wang ◽  
Jiyong Liu ◽  
Bernhard Spingler ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Structural Characterization ◽  
Spectroscopic Methods ◽  
Fundamental Interest ◽  
Derivatives Of

The synthesis and structural characterization of new derivatives of [B12H12]2− is of fundamental interest and is expected to allow for extended applications. Herein we report on the synthesis of a series of amidine, amide, urea and isocyanate derivatives based on the amino-closo-dodecaborate anion [B12H11NH3]−. Their structures have been confirmed by spectroscopic methods, and nine crystal structures are presented.

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