Effect of different nitrogen sources on the viscosity and rheological properties of welan gum produced by Sphingomonas sp. ATCC 31555

2020 ◽  
Vol 51 (4) ◽  
pp. 642-649 ◽  
Author(s):  
Xiaopeng Xu ◽  
Zuoming Nie ◽  
Zhiyong Zheng ◽  
Li Zhu ◽  
Xiaobei Zhan
Keyword(s):  
Rheological Properties ◽  
Nitrogen Sources ◽  
Welan Gum

Production and Rheological Properties of Welan Gum Produced by Sphingomonas sp. ATCC 31555 with Different Nitrogen Sources

2017 ◽  
Vol 27 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Xiaopeng Xu ◽  
Zuoming Nie ◽  
Zhiyong Zheng ◽  
Li Zhu ◽  
Xiaobei Zhan
Keyword(s):  
Molecular Weight ◽  
Rheological Properties ◽  
Biomass Concentration ◽  
Bacterial Biomass ◽  
Nitrogen Sources ◽  
Monosaccharide Composition ◽  
Solution Concentration ◽  
Molar Ratio ◽  
Welan Gum ◽  
Beef Extract

This study aimed to investigate the effect of nitrogen sources on the production and rheological properties of welan gum produced by <i>Sphingomonas</i> sp. ATCC 31555. Six different nitrogen sources were used for ATCC 31555 fermentation, and 2 of these were further analyzed due to their more positive influence on welan gum production and bacterial biomass. Bacterial biomass, welan gum yield, welan viscosity, molecular weight, monosaccharide composition, acyl content, and welan structure were analyzed. Welan gum production and the biomass concentration of ATCC 31555 were higher in media containing NaNO<sub>3</sub> and beef extract. Welan viscosity decreased at higher temperatures of 30-90°C, and it increased with a higher welan concentration. In the media containing NaNO<sub>3</sub> (3 g·L<sup>-1</sup>), welan viscosity was higher at 30-70°C and a welan solution concentration of 6-10 g·L<sup>-1</sup>. With a reduced NaNO<sub>3</sub> concentration, the molecular weight of welan gum and the molar ratio of mannose decreased, but the molar ratio of glucuronic acid increased. With different nitrogen sources, the acetyl content of welan gum differed but its structure was similar. NaNO<sub>3</sub> and beef extract facilitated welan production. A reduced NaNO<sub>3</sub> concentration promoted welan viscosity.

scholarly journals Rheological properties of welan gum in aqueous media.

1990 ◽  
Vol 54 (12) ◽  
pp. 3079-3084 ◽  
Author(s):  
Masakuni TAKO ◽  
Masahiro KIRIAKI
Keyword(s):  
Rheological Properties ◽  
Aqueous Media ◽  
Welan Gum

Effect of the Welan Gum Biopolymer on Rheological Properties and Storage Stability of Bitumens

2016 ◽  
Vol 44 (6) ◽  
pp. 20150119 ◽  
Author(s):  
Liang-Liang Tu ◽  
Shao-Peng Wu ◽  
Gang Liu ◽  
Xin-Xing Zhou ◽  
Shan-Kui Ma
Keyword(s):  
Rheological Properties ◽  
Storage Stability ◽  
Welan Gum ◽  
And Storage

scholarly journals Rheological Properties of Welan Gum in Aqueous Media

1990 ◽  
Vol 54 (12) ◽  
pp. 3079-3084 ◽  
Author(s):  
Masakuni Tako ◽  
Masahiro Kiriaki
Keyword(s):  
Rheological Properties ◽  
Aqueous Media ◽  
Welan Gum

Different nitrogen sources change the transcriptome of welan gum-producing strain Sphingomonas sp. ATCC 31555

2017 ◽  
Vol 199 (7) ◽  
pp. 1055-1064 ◽  
Author(s):  
Xiaopeng Xu ◽  
Zuoming Nie ◽  
Zhiyong Zheng ◽  
Li Zhu ◽  
Hongtao Zhang ◽  
...  
Keyword(s):  
Nitrogen Sources ◽  
Welan Gum

The comparison of rheological properties of aqueous welan gum and xanthan gum solutions

2013 ◽  
Vol 92 (1) ◽  
pp. 516-522 ◽  
Author(s):  
Long Xu ◽  
Guiying Xu ◽  
Teng Liu ◽  
Yijian Chen ◽  
Houjian Gong
Keyword(s):  
Rheological Properties ◽  
Xanthan Gum ◽  
Welan Gum

Foaming and rheological properties of hydroxypropyl methylcellulose and welan gum composite system: The stabilizing mechanism

2021 ◽  
Vol 112 ◽  
pp. 106275 ◽  
Author(s):  
Jingsong Zhu ◽  
Zhuojia Qian ◽  
Mohamed Eid ◽  
Fuchao Zhan ◽  
Muhammad Asif Ismail ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Composite System ◽  
Hydroxypropyl Methylcellulose ◽  
Welan Gum
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