Preparation, Properties of Partially Hydrolized Guar Gum

2013 ◽  
Vol 781-784 ◽  
pp. 1901-1906 ◽  
Author(s):  
Min Sun ◽  
Hong Bo Tang ◽  
Si Qing Dong ◽  
Yan Ping Li
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Hydrochloric Acid ◽  
Mass Concentration ◽  
Guar Gum ◽  
Water Soluble ◽  
Freeze Thaw ◽  
Thermogravimetric Analyzer ◽  
Partially Hydrolyzed Guar Gum ◽  
Guar Seed

Guar gum is a highly viscous water soluble heteropolysaccharide obtained from guar seed endosperm portion. Partially hydrolyzed guar gum (PHGG) is low in viscosity and has the healthy benefits as the dietary fiber. In this study, the effect of amount of acidolysis agent, ethanol content, acidolysis temperature and time on the acidolysis degree of guar gum was investigated by using the solvent method. The thermal properties were characterized by the idifferential scanning calorimeter and thermogravimetric analyzer, respectively. It was showed that the better conditions for preparing PHGG were: acidolysis temperature 40°C, acidolysis time 4h, ethanol mass concentration 61%, respectively. The freeze-thaw stability, expansion capability decreased after guar gum was partially hydrolized by hydrochloric acid. The onset temperature, end temperature and peak temperature of PHGG all increased, but its melting enthalpy and thermal stability were reduced, compared with those of guar gum.

scholarly journals Effect of Repeated Consumption of Partially Hydrolyzed Guar Gum on Fecal Characteristics and Gut Microbiota: A Randomized, Double-Blind, Placebo-Controlled, and Parallel-Group Clinical Trial

Nutrients ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 2170 ◽  
Author(s):  
Zenta Yasukawa ◽  
Ryo Inoue ◽  
Makoto Ozeki ◽  
Tsutomu Okubo ◽  
Tomohisa Takagi ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Healthy Volunteers ◽  
Guar Gum ◽  
Water Soluble ◽  
Double Blind ◽  
Fecal Microbiome ◽  
Double Blind Placebo ◽  
Bowel Movements ◽  
Stool Form ◽  
Partially Hydrolyzed Guar Gum

Partially hydrolyzed guar gum (PHGG) is a water-soluble dietary fiber and is used in solid and liquid food to regulate gut function. The aim of this study was to investigate effects of PHGG on bowel movements (stool form and frequency), plasma bile acids, quality of life, and gut microbiota of healthy volunteers with a tendency toward diarrhea, i.e., irritable bowel syndrome diarrhea (IBS-D)-like symptoms. A randomized, double-blind, placebo-controlled, and parallel trial was performed on 44 healthy volunteers (22 males, 22 females, 41.9 ± 6.3 years old (average ± SD)) with minimum 7 bowel movements every week, wherein above 50% of their stool was between the Bristol stool scale (BSS) value of 5 and 6. Intake of the PHGG for 3 months significantly improved stool form, evaluated using BSS, and had no effects on stool frequency. BSS was significantly normalized in the group consuming the PHGG compared with the placebo. Comprehensive fecal microbiome analysis by the 16S rRNA-sequence method detected significant changes in the ratio of some bacteria, such as an increase of Bifidobacterium (p < 0.05) in the PHGG group. Our results suggest that intake of PHGG improves human stool form via regulating intestinal microbiota.

scholarly journals Enhanced electrical and thermal properties of semi-conductive PANI-CNCs with surface modified CNCs

RSC Advances ◽  
2021 ◽  
Vol 11 (19) ◽  
pp. 11444-11456
Author(s):  
Po-Yun Chen ◽  
Chieh Hsu ◽  
Manikandan Venkatesan ◽  
Yen-Lin Tseng ◽  
Chia-Jung Cho ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
High Conductivity ◽  
Surface Modified ◽  
High Dispersibility

Biodegradable surface-modified CNCs were synthesized found high dispersibility and flexibility. Polyaniline-doped CNCs nanocomposites were exhibited high conductivity and thermal stability that may be promising for flexible semiconductors.

scholarly journals Improved thermally stable oligoetherols from 6-aminouracil, ethylene carbonate and boric acid

2019 ◽  
Vol 17 (1) ◽  
pp. 1080-1086
Author(s):  
Elżbieta Chmiel-Szukiewicz
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Boric Acid ◽  
Ethylene Carbonate ◽  
Pyrimidine Ring ◽  
Polyurethane Foams ◽  
High Thermal Stability ◽  
H Nmr ◽  
Maldi Tof ◽  
Instrumental Methods

AbstractSyntheses of oligoetherols with a 1,3-pyrimidine ring and boron atoms using 6-aminouracil, ethylene carbonate and boric acid has been proposed. The structure of the obtained products were determined by instrumental methods (IR, 1H-NMR and MALDI-ToF spectra). The physicochemical and thermal properties of oligoetherols were examined. The products were characterized by high thermal stability. Based on the tests performed, it was found that oligoetherols obtained from 6-aminouracil, boric acid and ethylene carbonate are suitable for the manufacturing of polyurethane foams with improved thermal stability and reduced flammability.

Effect of polycyclosilane microstructure on thermal properties

2021 ◽  
Author(s):  
Qifeng Jiang ◽  
Sydnee Wong ◽  
Rebekka S Klausen
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Thermal Characterization ◽  
Side Chains ◽  
Phase Properties

Thermal characterization of polysilanes has focused on the influence of organic side chains, whereas little is understood about the influence of silane backbone microstructure on thermal stability, phase properties, and...

Su2063 Partially Hydrolyzed Guar Gum (PHGG) Inhibits Castor Oil-Induced Diarrhea in Rats Through the Inhibition of Substance P Production

2013 ◽  
Vol 144 (5) ◽  
pp. S-546
Author(s):  
Kentaro Suzuki ◽  
Yuji Naito ◽  
Kazuhiro Kamada ◽  
Syunsuke Kishimoto ◽  
Yukiko Uehara ◽  
...  
Keyword(s):  
Substance P ◽  
Castor Oil ◽  
Guar Gum ◽  
Partially Hydrolyzed Guar Gum

Oxidative Polymerization of 3-Amino,2'-,(3')–Nitrodiphenylazomethin

2018 ◽  
Vol 935 ◽  
pp. 134-139 ◽  
Author(s):  
Timur A. Borukaev ◽  
A.Kh. Malamatov ◽  
M.K. Vindizheva ◽  
A.V. Orlov ◽  
S.G. Kiseleva
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Chemical Structure ◽  
Oxidative Polymerization ◽  
Polymerization Process ◽  
Chain Growth ◽  
Polymer Product ◽  
Two Stages

Oxidative polymerization of 3-amino,2'-,(3')-nitrodiphenylazomethine was carried out in various ways. A possible mechanism for the polymerization of 3-amino,2'-,(3')- nitrodiphenylazomethine, where chain growth occurs as type N-C, is shown. It has been found that the yield of the polymer product is affected by the polymerization process and time. The chemical structure of the polymers obtained is established. The study of the thermal properties of polymers showed a low thermal stability and the process of destruction proceeds in two stages.

scholarly journals Study on the ability of partially hydrolyzed guar gum to modulate the gut microbiota and relieve constipation

2018 ◽  
Vol 43 (2) ◽  
pp. e12715 ◽  
Author(s):  
Xiaodan Fu ◽  
Rong Li ◽  
Tan Zhang ◽  
Meng Li ◽  
Haijin Mou
Keyword(s):  
Gut Microbiota ◽  
Guar Gum ◽  
Partially Hydrolyzed Guar Gum
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