槟榔次碱

In order to optimize technological parameters of arecoline extraction from areca nut using supercritical carbon dioxide extraction technique, the effects of extraction temperature, extraction pressure and extraction time on arecoline extraction were explored by second-order regression general rotation design.

为了优化超临界CO2萃取槟榔碱的工艺参数，通过三元二次通用旋转组合设计实施试验，考察了萃取温度、萃取压力和萃取时间因素对槟榔碱萃取量的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。