浓度

Caffeic acid could resist the H2O2-induced cell apoptosis, with the possible molecular mechanism of regulating the NF-κB, P53 and BCL-2 expression.

不同浓度的咖啡酸对H2O2引起的HUVEC-12损伤有保护作用，并呈现一定的浓度依赖性和时效性，其机制可能与调节NF-κB、P53和Bcl-2蛋白的表达有关。

The effects that alcohol activates Ca in different consistence , different calcine time , different ratio of and lactic acid extract Ca from oyster shell were studied in this paper.

为充分利用牡蛎壳的钙资源，对乙醇在不同浓度、不同烧煮时间、不同配比条件对牡蛎壳粉中钙的活化效果及不同浓度的乳酸对活性钙的提取效果进行了研究。

When pH is 10, adsorption time is 30 min, dosage of bone char is 0.6 g/L, the original concentration of As in drinking water is 0.5 mg/L, As removal can reach 95.2%. The adsorption behavior is fitted both with Langmuir and Freundlich isotherm. The adsorption mechanism is supposed to be Ca—OH functional groups combined with anion. And there may occur the co-precipitation between calcium hydrogen arsenate and hydroxylapatite in the aqueous solution, and ions also exchange. The saturation adsorption capacity of As reaches 4.688 mg/g. Indexes of effluent are in good agreement with the WHO stringent drinking water standards (0.01 mg/L).

研究结果表明：在pH=10，吸附时间为30 min和骨炭加入量为0.6 g/L，饮用水砷初始质量浓度为0.5 mg/L时其砷去除率可达95.2%；骨炭吸附砷的行为同时符合Langmuir和Freundlich等温吸附模型；其吸附机理可能是Ca—OH官能团结合HASO4阴离子，并产生砷酸氢钙和羟基磷灰石的共沉淀，另外还存在离子交换作用；吸附柱的饱和吸附容量为4.688 mg/g；出水砷浓度符合世界卫生组织规定饮水砷标准(0.01 mg/L)。

The effect of 5% potassium nitrate on breaking natural dormancy of apple was the best, and the effect of calcium cyanamide diluted at 5 times on breaking natural dormancy of grape was the best.

结论］浓度为5%和7%的硝酸钾打破苹果自然休眠的效果最好，浓度为5倍液的石灰氮打破葡萄自然休眠的效果最好。

The results showed that: different concentrations of sucrose and boric acid had significant impact on pollen germination, but different concentrations of calcium had no significant impact on pollen germination. It was most appropriate for tube elongation when sugar 150 gL^(-1) and boric acid 100 gL^(-1). Lack of sucrose would lead to the accumulation of callose in top of pollen tube and hold back its growth. The distribution of callose was regular in pollen tube when the medium lacked boric.

结果表明：蔗糖、硼酸浓度间对花粉萌发有显著影响，钙浓度间对花粉萌发的促进作用不明显；蔗糖150 gL^(-1)、硼酸100 mgL^(-1)时最适宜花粉管伸长；蔗糖的缺乏会导致胼胝质在花粉管顶端积累，使其生长停滞，缺硼时胼胝质在花粉管内分布正常。

In addition, the cell viabilities of HCT-8 co-treated with Fraction H7-3 and H13-3 (50 μg/mL) were 47.0 ± 2.0 % that were more effective then treated with single fraction. In conclusion, the results revealed that the interaction between constituents of Antrodia camphorate have potential to enhance the anti-tumor abilities.

并从交互合并处理的结果得知Fraction H7-3合并H7-5及Fraction H7-5合并H13-3於处理浓度50 μg/mL下，A549细胞存活率分别为60.0 ± 3.6 %及50.5 ± 2.2 %；Fraction H7-3合并H13-3於处理浓度50 μg/mL下，HCT-8细胞存活率为47.0 ± 2.0 %，皆比单独给予更具有明显的效果，显示樟芝固态发酵产物的物质间存在一些交互作用增加其对肿瘤细胞的抑制能力。

The results showed that temperature rise would inhibit their esterification capacity, ethyl caproate-producing capability of raw zymin of 1# high-temperature monascus improved with the prolong of the esterification time when ethanol concentration was 4 %vol and caproic acid content was 4 mL, and when ethanol concentration and caproic acid content was within proper range, caproic acid content had more effects on the formation of ethyl caproate by raw zymin than ethanol concentration.

结果表明，温度相对升高对其酯化力的形成有一定的抑制作用；高温型红曲1#酯化菌株粗酶制剂的酯化力在乙醇浓度为4 %vol、己酸含量为4 mL时，产生己酸乙酯的能力随酯化时间的延长而增强；在适宜的乙醇浓度和己酸含量范围内，己酸含量对酯化酶粗酶制剂己酸乙酯生成影响比乙醇含量的影响大。

By analysis the basic structure of glucose carbohydrase electrode and the contributing factors to the blood glucose concentration monitor,the measure principle and implementation method of blood glucose concentration are given.

通过分析葡萄糖酶电极的基本结构和影响血糖浓度监测的因素，给出了血糖浓度的测量原理和实现方法。

Non-smoking women from 40 to 65 years of age were analyzed for the effects of home exposure to coal or gas on their respiratory symptoms, lung function, and carboxyhemoglobin.

研究表明家庭烹调燃煤使室内SO_2、CO浓度大大增加，燃煤气使NO_2浓度大大增加。燃煤者呼吸系统症状出现率及HbCO均高于燃气者(P.05)。

Exhaled COlevels were measured in gas sampled from the expired limb ofthe respiration circuit using a CO monitor. The effects of sequentialchanges of Fio2 on exhaled CO levels, and the effects of long-terminhalation of Fio2 0.75 and Fio2 0.35 on exhaled CO levels andarterial carboxyhemoglobin concentrations were investigated.

在呼吸回路的分岔口使用一氧化碳监测仪来监测呼出气一氧化碳的水准，从而研究吸入氧浓度对呼出一氧化碳水准的影响，长时间吸入75％和35％氧时对呼出一氧化碳水准和动脉碳氧血红蛋白浓度的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐