The volatile oil of Artemisia argyi was extracted by ultrasonic assisted extraction, and the extraction rate of volatile oil was 0.68%. Thevolatile oil of A. argyi was emulsified with 1% Tween-80, and drug susceptibil...The volatile oil of Artemisia argyi was extracted by ultrasonic assisted extraction, and the extraction rate of volatile oil was 0.68%. Thevolatile oil of A. argyi was emulsified with 1% Tween-80, and drug susceptibility test was conducted with avian Escherichia coli. The results showedthat the volatile oil of A. argyi had antibacterial effect against avian E. coli, and the minimal inhibitory concentration was 50 mg/mL. Taking sixcommon antibiotics as the control, drug susceptibility test was conducted with volatile oil of A. argyi. The results showed that 10 strains of E. coliwere sensitive to the volatile oil of A. argyi, three of which had different degrees of resistance and one had the tendency of resistance.展开更多
[Objective] The precipitation conditions of salting out method for extracting shaddock peel pectin were studied.[Method] Taking shaddock peel as the raw material, the optimal technological conditions for pectin precip...[Objective] The precipitation conditions of salting out method for extracting shaddock peel pectin were studied.[Method] Taking shaddock peel as the raw material, the optimal technological conditions for pectin precipitation were obtained by precipitating shaddock peel under dif-ferent salting-out conditions.[Result] The optimal conditions of salting out method for precipitating shaddock peel pectin were as follows: aluminum sulfate saturated solution: pectin extract 1∶1, salting out time 60 min, salting out temperature 60℃, salting out pH 4, and the extraction rate reached 6.8%.[Conclusion] Precipitation of pectin through salting out method reduced the consumption of ethanol, energy consumption and production cost.展开更多
In order to improve the comprehensive utilization value of water chestnut peel and the income of farmers. Contents of crude protein （ CP）, total sugar and reducing sugar were taken as indicators. Effects of initial ...In order to improve the comprehensive utilization value of water chestnut peel and the income of farmers. Contents of crude protein （ CP）, total sugar and reducing sugar were taken as indicators. Effects of initial pH, ratio of yeast to fungi species, incubation time and liquid volume on production of single cell pro- tein （SCP） feed was studied, and technological conditions on production of SCP feed by water chestnut peel were optimized by orthogonal test. Results showed that the production of SCP feed by water chestnut peel was optimal when pH was 5.0, ratio of yeast to fungi species was 2： 1, fermentation time was 2 d and the liquid volume was 70 mL / 250 mL. Under the optimum conditions, content of fermentation CP was 64.25%, content of total sugar was 19.8%, content of reducing sugar was 5.0%, content of coarse fibre was 0.0% and content of ash was 8.04%.展开更多
基金Supported by Scientific Research and Technology Development Program of Guangxi ProvinceConstruction of Science and Technology Service Platform in Hezhou Agricultural Science and Tech-nology Park(GKN 14258003)Scientific Research Project of Hezhou University(HZU-JS201617)
文摘The volatile oil of Artemisia argyi was extracted by ultrasonic assisted extraction, and the extraction rate of volatile oil was 0.68%. Thevolatile oil of A. argyi was emulsified with 1% Tween-80, and drug susceptibility test was conducted with avian Escherichia coli. The results showedthat the volatile oil of A. argyi had antibacterial effect against avian E. coli, and the minimal inhibitory concentration was 50 mg/mL. Taking sixcommon antibiotics as the control, drug susceptibility test was conducted with volatile oil of A. argyi. The results showed that 10 strains of E. coliwere sensitive to the volatile oil of A. argyi, three of which had different degrees of resistance and one had the tendency of resistance.
基金Supported by Guangxi Scientific Research and Technology Development Plan "Construction of Science and Technology Service Platform of Hezhou Agricultural Science and Technology Park"(GKN14258003)Research Project of Hezhou University(HZUJS201617)
文摘[Objective] The precipitation conditions of salting out method for extracting shaddock peel pectin were studied.[Method] Taking shaddock peel as the raw material, the optimal technological conditions for pectin precipitation were obtained by precipitating shaddock peel under dif-ferent salting-out conditions.[Result] The optimal conditions of salting out method for precipitating shaddock peel pectin were as follows: aluminum sulfate saturated solution: pectin extract 1∶1, salting out time 60 min, salting out temperature 60℃, salting out pH 4, and the extraction rate reached 6.8%.[Conclusion] Precipitation of pectin through salting out method reduced the consumption of ethanol, energy consumption and production cost.
基金Supported by Guangxi Science and Technology Development Project:Construction of Technology Services Platform of Hezhou Agricultural Science and Technology Park(14258003)Guangxi Higher Education Teaching Reform Project:Research on Regional Academic Specialty Biological Experiment Teaching Mode Innovation and Service of Local Economy(2014JGZ145)
文摘In order to improve the comprehensive utilization value of water chestnut peel and the income of farmers. Contents of crude protein （ CP）, total sugar and reducing sugar were taken as indicators. Effects of initial pH, ratio of yeast to fungi species, incubation time and liquid volume on production of single cell pro- tein （SCP） feed was studied, and technological conditions on production of SCP feed by water chestnut peel were optimized by orthogonal test. Results showed that the production of SCP feed by water chestnut peel was optimal when pH was 5.0, ratio of yeast to fungi species was 2： 1, fermentation time was 2 d and the liquid volume was 70 mL / 250 mL. Under the optimum conditions, content of fermentation CP was 64.25%, content of total sugar was 19.8%, content of reducing sugar was 5.0%, content of coarse fibre was 0.0% and content of ash was 8.04%.
