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This study was conducted to investigate the mechanism of biogas yield improvement of the pretreated rice straw.

方文杰 北京化工大学环境科学与工程系，北京 100029康佳丽北京化工大学环境科学与工程系，北京 100029

Washed with PBS buffer for several times, the activity of pretreated yeasts could be recovered gradually.

预处理后的酵母细胞经PBS缓冲液多次洗涤后，其活性可以逐渐得到恢复。

It was also found base transversion had a extremely high ocurrence frequency in the single base substitution mutants when the plasmid was replicated in FL-FEN-1〓 cell or MNNG pretreated FL-FEN-1〓 cell, while in all mutants with multiple base substitution there were at least one transversion mutation taken place.

分析还发现，在FL-FEN-1〓细胞自发突变和非定标突变含有单碱基替换突变的突变子中，碱基颠换的发生率极高，而在FL-FEN-1〓细胞自发突变和非定标突变的多碱基替换突变子中，每个突变子均至少含有一个碱基颠换突变。

Protein hydrolysates were prepared by enzymatic hydrolysis of pretreated waste brewer's yeast .

利用啤酒废酵母资源，通过破壁预处理与复合酶降解相结合的工艺，制取特定相对分子质量范围的蛋白水解物。

The results show that it can effectively control the penetration of cobalt and improve the quality of diamond coating and improve tool's life by 10 times when the substrate is pretreated in the condition of acid leaching in dilute HCl for 15 min and then soaking in dilute ammonia solution for 10 min.

结果表明，在1∶3的稀盐酸中酸洗15 min后用氨水浸泡10 min的基片处理方法能有效地抑制金属钴的溢出，从而提高金刚石涂层的质量，并且使刀具使用寿命提高10倍以上。

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。