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Acetone has been in common use as a solvent and as an extracting regent, in industry for several decades. It is easy to evaporate in air. When the concentration of acetone in air is higher than 10,000 ppm, people may experience such symptoms as cephalalgia, nausea and so on.

由於丙酮是工业上广泛应用的溶剂，它极易挥发，且当人体曝露在高浓度的丙酮下，会有头痛、困倦及呕吐等症状，所以丙酮感测器可应用於工业的环境检测。

The device also calculates, based on the measured property of the test strip, a characteristic (e.g., blood glucose concentration or INR) of a fluid sample applied to the test strip.

该装置也根据测试条的测量特性计算应用于测试条的流体样品的特性(例如，血液葡萄糖浓度或INR)。

Then the intracellular calcium concentration of neurons was measured by laser confocal scanning microscope , represented by the mean intracellular fluorescent intensity. On the ice, the cerebral cortical tissue at the infarction margin of the section after optic chiasm was rapidly dissociated about 100mg, then made into brain homogenate in low temperature. The high performance liquid chromatography was used to determine the Glu, Asp and Gly contents in homogenized brain tissue.

视交叉平面用2％TTC染色，用图像处理软件计算出脑梗死面积占该片脑组织面积的百分比；取视交叉前平面梗死边缘区皮层组织约100mg，用酶消化法制作神经细胞悬液，用激光扫描共聚焦显微镜检测皮层神经元细胞内游离钙离子浓渡，以细胞平均的荧光强度代表细胞内钙浓度；冰上迅速分离视交叉后梗死边缘区皮层组织约100mg，于低温下制作脑组织匀浆，用高效液相色谱法测定皮层匀浆中谷氨酸、天门冬氨酸、甘氨酸的含量。

With sand culture in greenhouse, this paper studied the effects of different concentration sea water on the biomass, ion absorption and distribution, chlorophyll content, and photosynthesis of chicory seedlings.

采用沙培的方式，研究了不同浓度海水对菊苣幼苗生物量、离子吸收分布、叶绿素含量以及光合作用变化的影响。

The effects of different nitrogen concentration, forms and proportion on the root activity, chlorophyll and mineral elements of Chinese chive.

研究了不同供氮水平、不同形态氮素及配比对韭菜的根系活力、叶绿素含量和矿质元素含量的影响。

In the nitrogen concentration of 8 mmol-L1, cultivar 791 and Hanzhong Chinese chive were studieded in the effects of different nitrogen forms and proportion on growth, nitrate content and the quality of nutrition.

以"791"和"汉中冬韭"为试材，研究了8 mmol·L~(-1)氮素水平下不同氮素形态及配比对791和汉中冬韭的生长状况、硝酸盐含量和营养品质的影响。

The effects of the reaction time,the concentration of chloral and the pH on dechlorination were obtained,and the results showed that the dechlorinate effect was obvious.

实验结果表明，还原铁粉对三氯乙醛有明显的脱氯作用，脱氯率随三氯乙醛质量浓度的减小而增大，随pH值的减小而增大，随反应时间的增加而增大。

The experimental results were followed:(1) LY402 could degrade chlordane in an aerobic environment. The percent of chlordane degradation at 1.0 mg /L was more than 94% after 4 days at 30℃. When exposed to a concentration as high as 10.0 mg/L, LY402 could still degrade 61% of chlordane. There was no obvious difference between cis-chlordane and trans-chlordane in the mixture on biotransformation rate.

实验结果表明：(1)在好氧条件下，LY402能够有效降解氯丹，对于1mg/L的顺式氯丹和反式氯丹混合物，在30℃下，经过4天的好氧降解，其总降解率接近95%，进一步将氯丹混合物的总量增加到10.0mg/L，其4天的总生物降解速率仍然能够达到64%，其中，顺式氯丹和反式氯丹的生物降解速率没有明显区别。

Under the same conditions of illumination and the concentration of nutrition, copper chlorophyll has advantage of no-repollution, no-poison, better effect, long-time effect of restrain and so on, comparing with copper ion, and the mechanism that copper chlorophyll and copper sodium chlorophyllin have very strong influence to growth of microalga is analyzed in the theory.

同时，本文也研究了太湖底泥在不同水土比、好氧与厌氧条件下的N、P营养释放规律；太湖底泥粒径分布与其中的N、P、有机物分布之间的关系；模拟太湖的不同疏浚条件，探讨了水体生态系统的演变规律。

RESULTS: Different doses of cholesterin caused different degrees of apoptosis and inhibition of proliferation in HUVECS. With increasing concentration of cholesterin , the effects on HUVECs were enhanced.

结果： 不同浓度的胆固醇可不同程度地诱导HUVEC细胞发生凋亡，可明显抑制HUVEC细胞增殖，且随浓度增高，其作用均明显增强。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。