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Teng C.,Beijing Technology and Business University | Fan Y.,Beijing Technology and Business University | Xiao L.,Shandong Longlive Bio technology Co. | Liu M.,Beijing Technology and Business University | Li X.,Beijing Technology and Business University
Journal of Chinese Institute of Food Science and Technology | Year: 2013

Single factor preliminary and response surface methodology (Box-Behnken center combination examination) was applied to optimize conditions if soluble dietary fiber (SDF) extracted by enzymatic method from corncob. Results showed the optimal conditions were: liquid ratio of 1:20, cellulose 2.1 U/mL, xylanase 1.5 U/mL, 2.5 h, alcohol precipitation time 6 h, 55°C. Under these conditions, the yield of soluble dietary fiber rate was 21.10%. In this study, water holding capacity, swelling capacity and soluble substances content were also researched, which was 6.84 g/g, 7.47 mL/g, 1.21 g/100 mL water. Source


Bai C.,Shandong Institute of Light Industry | Liu X.,Tsinghua University | Wang Y.,Shandong Institute of Light Industry | Li S.,Tsinghua University | And 2 more authors.
Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology | Year: 2010

With dilute sulfuric acid as catalyst, the effects of reaction temperature and sulfuric acid concentration on xylose dehydration reaction were investigated under microwave irradiation. The kinetics equation of xylose dehydration was built. The results showed that the conversion of xylose increased with the increase of reaction temperature and mass fraction of sulfuric acid. The activation energy was 48.05 kJ/mol and the frequency factor changed with mass fraction of sulfuric acid. The conversion of xylose calculated by the kinetics equation was in good agreement with the conversion from experiment. Source


Gao Y.,Yantai University | Zhang S.,Yantai Vocational College | Li C.,Yantai University | Xiao L.,Shandong Longlive Bio technology Co. | And 2 more authors.
Toxicology Mechanisms and Methods | Year: 2012

Xylo-oligosaccharide (XOS) is sugar oligomers composed of a β-1,4-linked xylopyranosyl backbone that are obtained by either chemical or, more commonly, enzymatic hydrolysis of xylan polysaccharides extracted from plant cell wall. In this study, acute and subchronic toxicity of XOS in mice and rats have been evaluated, respectively. In the acute study, no obvious clinical signs of toxicity or mortality were observed in mice at the dosage of 32g/kg BW XOS, excepting transient unformed stools were observed. In the subchronic study, XOS was evaluated in rats with dietary administration at concentrations of 0 (control), 0.9, 2.9, 8.8 and 10% for 13 weeks. Measurements included clinical observations, body weight, food consumption, food conversion efficiency, hematology, blood chemistry, gross necropsy, organ weight and histopathology. Under the conditions, no treatment-related changes were noted in behavior or appearance of the rats and no mortalities occurred. No toxicological findings were found in food consumption, food conversion efficiency, hematology, clinical biochemistry or organ weights in either sex. It is concluded, therefore, that the high dose level, at which the female and male rats consumed about 11.51 and 14.95g XOS/kg bw/d, respectively, is the no observed adverse effect level (NOAEL) of this 13-week toxicity study. © 2012 Informa Healthcare USA, Inc. Source


Teng C.,Beijing Technology and Business University | Fan Y.,Beijing Technology and Business University | Qu L.,Beijing Technology and Business University | Zha P.,Beijing Technology and Business University | And 2 more authors.
Journal of Chinese Institute of Food Science and Technology | Year: 2015

The culture conditions of a thermophilic fungus F1208 with high yield of xylanase activity were optimized by single-factor experiment and Box-Behnken design matrix of response surface methodology. The influences of medium composition and fermentation conditions in the cultivation were investigated. A high xylanase activity of 3 026.65 U/mL was obtained in 7 days, which was 3.15 fold of the initial enzyme activity (960.39 U/mL). The results indicated optimum conditions were corncob, mesh number 24~40,5%; soya peptone and yeast cream (ratio 1:3) 2%; glycerine 0.2%; pH 6.4, and the fermentation conditions was 60 mL, 48℃ and 200 r/min. ©, 2015, Chinese Institute of Food Science and Technology. All right reserved. Source


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Shandong Longlive Bio Technology Co. | Date: 2011-09-27

Dietary supplement to use as a food ingredient; dietary supplement.

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