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According to analysis of root exudates by HPLC, aluminum induced roots of stylo to secret citrate and its secretion increased with Al concentration treated (0, 10, 20, 50 umol L-1) and the period of exposure to Al (6, 12, 18, 24 h), which indicated that Al-induced secretion of citrate is an important mechanism for stylo to resist the toxicity of aluminum.

采用高效液相色谱法对根系分泌物的分析发现，铝诱导柱花草根系分泌柠檬酸，并且其分泌量随铝处理浓度0、10、20、50 μmol L~(-1和时间(6、12、18、24 h)的增加而增加，表明铝诱导根系分泌柠檬酸是柱花草抵御铝毒害的重要机制。

The end products in PYG broth were mainly acetic acid, lactic acid and small amount of succinate acid.

在PYG肉汤中的代谢产物主要为乙酸、乳酸以及少量的琥珀酸和异戊酸。G+C mol%为33.16S rRNA 序列分析和同源性检索发现YP 和芽孢杆菌一些种的同源性较高，可达96%。

The detection limit was 5.0×10^(-7) mol/L. With the proposed method, SD in sulfadiazine tablets was determined.

用此方法测定了磺胺嘧啶片剂中磺胺嘧啶的含量，结果满意。

, 80g/l HPZ-Ti solution can be stored stably for more than one year at atmospheric temperature (the highest temp. is 35℃), the precipitation point pH of 0.05M HPZ-Ti solution exceeds 4. 6, the stability can meet the tannage need. The tanning power of HPZ-Ti tanning liquor is better than that of any other titaninum tanning liquors which have been researched.

与钛配位能力适中，在革内有较好的渗透性，HPZ—Ti配合物与胶原有较大的反应活性，HPZ与Ti以0.45mol HPZ/mol Ti比例混和，浓度为80g/l时，在室温下（最高温度35℃）可稳定存放一年以上，浑浊点pH值达4.60以上，其鞣性优于其它配体蒙囿的钛溶液和其它方法制备的钛鞣剂。

METHODS: Fresh bovine tendo calcaneus collagen was dispersed in 0.5 mol/L acetic acid, co-precipitated with chitosan and lyophilized. Dry membranes were cross-linked in 0.05% glutaraldehyde for 24 hours. In vitro its degrading rate was measured by use of collagenase degrading test. The chitosan-collagen membrane was implanted to subcutaneous dorsal sites of SD rats. After implantation, histocompatibility, vascularity and degradation were observed in vivo.

以酸溶法制备胶原溶液，添加一定比例的脱乙酰化几丁质，冻干成膜，0 。0 5 %戊二醛溶液浸泡交联，行体外酶降解实验，检测其耐受酶降解能力；将制备的几丁质-胶原蛋白膜包埋于 36只 SD大鼠皮下，术后 3、5天，1、2、3、4、6、8和 12周取材，检测其组织相容性、血管化能力及材料在体内降解情况。

The microculture tetrazolium assay was used to determine the anti-proliferative effects of As2O3 on human RCC lines.

结果：As2O3以浓度依赖方式抑制RCC-WCS细胞的体外生长，在浓度为0.5、1.0、2.0和4.0μmol／L作用96h时，As2O3对RCC-WCS细胞的抑制率分别为27.60％、30.09％、41.03％和50.77％；与未经As2O3处理的RCC-WCS细胞相比，均有显著性差异(P.01)。

It was found that thionine could mediate the electron transfer of HRP with the electrode substrate.

硫堇的表观覆盖度为8.54×10〓mol/cm〓，硫堇与玻碳电极之间的异相电子转移速率常数为0.97s〓。

The waves are very useful for the determination Of these compounds, for homocystine, 6-mercaptopurine and thiouracil, the detection limits are 2×10-8, 8×10-8 and 5×10-8 mol/L,respecrespectively.

处产生的阳极化波较为灵敏，其检测限为2×10－8mol／L高胱氨酸，线性范围为8×10－8～1×10－5mol／L.6－巯基嘌呤和硫尿嘧啶在乙二胺介质中与铜产生的络合物波较好，前者在－0.83V处和后者在－0.44V处的阴极波较适合于分析。它们的检测限分别为8×10－8mol／L和5×10－8mol／L，线性范围为1×10－7～1×10－5和1×10－7～2×10－5mol／L。

Under the conditions of microwave heating of 1 h, sul- furic acid concentration 8.0 mol/L and liquid/solid ratio 5.0 mL/g, most of the minerals in tailings can be dissolved except tremolite.

微波加热条件下，尾矿砂在硫酸浓度8mol／L、液固比5.0mL农条件下无需搅拌，反应1h后，除透闪石没有完全溶解外，绝大部分的矿物被溶解。

Under the conditions 0f microwave heating of I h, sulfuric acid concentration 8.0 mol/L and liquid/solid ratio 5.0 mL/g, most of the minerals in tailings can be dissolved except tremolite.

微波加热条件下，尾矿砂在硫酸浓度8mol/L、液固比5.0mL/g条件下无需搅拌，反应1h后，除透闪石没有完合适溶解外，绝大部分的矿物被溶解。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。