[Objective] On the basis of previous researches, this experiment aimed to analyze the effect of K＊ and the interaction of K＋ , salinity （ s）, Ca2＋ , Mg2＋ on growth and adenosine triphosphatase （ATPase）, which ...[Objective] On the basis of previous researches, this experiment aimed to analyze the effect of K＊ and the interaction of K＋ , salinity （ s）, Ca2＋ , Mg2＋ on growth and adenosine triphosphatase （ATPase）, which was closely related to growth, of Litopenaeus vannamei. [Method] 5 -week Litopenaeus vannamei breeding experiment was performed according to L16（215） orthogonal experiment design. Then the effect of K＋ and the interaction of K＋ , salinity, Ca2＋ , Mg2＋ in water on survival, growth and ATP enzyme activity of Litopenaeus vannamei. [Result] K＋ had signifi- cant effect on survival rate, length and weight gain, ATP enzyme activity in Litopenaeus vannarnei. The highest survival rate was at K＂ of 150 rng/L. The fastest growth rate was at 50 mg/L, as well as the activities of Na＊ - K＋ -ATPase, Mg2＋ -ATPase, Ca＋ -ATPase. The interaction of salini- ty, Ca2＋ , Mg2＋ , K ＋ in water also had significant effect on survival rate, length and weight gain, ATP enzyme activity in Litopenaeus vannamei. [Conclusion] Among the horizontal combinations of factors in the experiment, the optimal combination for Litopenaeus vannamei survival rate was salinity of 15, K＋ of 150 mg/L, Ca2＋ of 100 mg/L, Mg2＋ of 300 mg/L, the optimal combination for growth rate was salinity of 15, K＋ of 50 mg/L, Ca2＋ 100 mg/L, Mg2＋ 100 mg/L, the optimal combination for Na＋ -K＊ -ATPase, Mg2＋ -ATPase, Ca2＋ -ATPase activity in Litopenaeus van- namei was salinity of 5, K＋ of 50 mg/L, Ca2＋ of 100 mg/L, Mg2＋ of 100 mg/L.展开更多
Ponkan (Citrus reticulate Blanco) is one of the most popular citrus fruits for daily consumption and processing in China. In this study, limonene was removed from ponkan essential oil (PEO) by using an effective metho...Ponkan (Citrus reticulate Blanco) is one of the most popular citrus fruits for daily consumption and processing in China. In this study, limonene was removed from ponkan essential oil (PEO) by using an effective methodology to estimate the optimum levels of three independent variables of molecular distillation (MD) in order to minimize the limonene content and (b) maximize the removal rate. A three-factor Box-Behnken design (BBD) was employed to evaluate the effect of distilling temperature (45.00~55.00 ℃), wiper rolling speed (150.00~250.00 r/ min) and distilling pressure (25.00~35.00 Pa). The optimum parameters within the experimental range of the variables were extrapolated to be: distilling temperature 47.00℃, wiper rolling speed 203.00 r/min and distilling pressure 30.00 Pa. Optimal values extrapolated by response surface methodology (RSM) for the limonene content and removal rate of the desirable PEO were 47.82% and 84.67%, respectively.展开更多
基金Key Projects of Science and Technology Promoting Farm in Shanghai City (Shanghai Agricultural Key Project [2010] No.1-6 )Science and Technology Promoting Projects of Science and Technology Promoting Farm in Shanghai City(Shanghai Agricultural Promoting Project [2008]No.5 -1 )Leading Academic Discipline Project of Shanghai Education Commission(J50701)
文摘[Objective] On the basis of previous researches, this experiment aimed to analyze the effect of K＊ and the interaction of K＋ , salinity （ s）, Ca2＋ , Mg2＋ on growth and adenosine triphosphatase （ATPase）, which was closely related to growth, of Litopenaeus vannamei. [Method] 5 -week Litopenaeus vannamei breeding experiment was performed according to L16（215） orthogonal experiment design. Then the effect of K＋ and the interaction of K＋ , salinity, Ca2＋ , Mg2＋ in water on survival, growth and ATP enzyme activity of Litopenaeus vannamei. [Result] K＋ had signifi- cant effect on survival rate, length and weight gain, ATP enzyme activity in Litopenaeus vannarnei. The highest survival rate was at K＂ of 150 rng/L. The fastest growth rate was at 50 mg/L, as well as the activities of Na＊ - K＋ -ATPase, Mg2＋ -ATPase, Ca＋ -ATPase. The interaction of salini- ty, Ca2＋ , Mg2＋ , K ＋ in water also had significant effect on survival rate, length and weight gain, ATP enzyme activity in Litopenaeus vannamei. [Conclusion] Among the horizontal combinations of factors in the experiment, the optimal combination for Litopenaeus vannamei survival rate was salinity of 15, K＋ of 150 mg/L, Ca2＋ of 100 mg/L, Mg2＋ of 300 mg/L, the optimal combination for growth rate was salinity of 15, K＋ of 50 mg/L, Ca2＋ 100 mg/L, Mg2＋ 100 mg/L, the optimal combination for Na＋ -K＊ -ATPase, Mg2＋ -ATPase, Ca2＋ -ATPase activity in Litopenaeus van- namei was salinity of 5, K＋ of 50 mg/L, Ca2＋ of 100 mg/L, Mg2＋ of 100 mg/L.
文摘Ponkan (Citrus reticulate Blanco) is one of the most popular citrus fruits for daily consumption and processing in China. In this study, limonene was removed from ponkan essential oil (PEO) by using an effective methodology to estimate the optimum levels of three independent variables of molecular distillation (MD) in order to minimize the limonene content and (b) maximize the removal rate. A three-factor Box-Behnken design (BBD) was employed to evaluate the effect of distilling temperature (45.00~55.00 ℃), wiper rolling speed (150.00~250.00 r/ min) and distilling pressure (25.00~35.00 Pa). The optimum parameters within the experimental range of the variables were extrapolated to be: distilling temperature 47.00℃, wiper rolling speed 203.00 r/min and distilling pressure 30.00 Pa. Optimal values extrapolated by response surface methodology (RSM) for the limonene content and removal rate of the desirable PEO were 47.82% and 84.67%, respectively.
