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Low alkalinity, low mineralization, pH levels of 7 or lower should be avoided.

低碱、低矿物质含量、pH值低于7的流体应该避免。

Therefore, the toxicity of 1, 5, 6 is lower than the crude alkaloid's.

因此，生物碱单体1，5，6具有比总碱更小的毒性。

A metabolic alkalosis should cause the pCO2 to be higher, not lower than 40 mm Hg.

代谢性碱中毒引起Pco2变化应该是高于而不是低于40mmHg。

Modern industrial methods of synthesis of acetic acid ethyl ester oxidation and lower alkane oxidation France.

现代工业上合成乙酸的方法有乙醋氧化法和低级烷烃氧化法。

In the selected concentration range, its capacity to alkane radical was not obvious, and almost equal to VC, with scavenging rate lower than 50%.

在所选浓度范围内，清除烷基自由基的能力不明显，和VC相当，清除率均低于50%。

Supercritical conditions can enhance the conversion of isooctane but lower the alkene selectivity simultaneously.

超临界条件与常压相比能提高异辛烷的转化率，但同时使烯烃选择性降低。

Safflor Yellow, extracted from Safflor, with proved pharmacological effect that can expand coronary artery, lower blood pressure, resist thrombus, endure anoxemia and restrain immunity, will have a good developing and applying future. Since 1970s, more than 200 kinds of components such as flavone, lignocelluloses and alkine, have been extracted from Safflor.

红花黄色素(Safflor Yellow，SY)是从红花中提取的有效成分，具有扩冠、降压、抗血栓、耐缺氧、免疫抑制等多种药理学功效，有良好的开发和应用前景。70年代以来对红花的化学成分进行了广泛的研究，已分离出了二百多种化学成分，其中主要有黄酮类、木脂素类、多炔类等。

Combining the performance evaluation (activity, selectivity and stability) and the characterization of the catalysts (XRD, TPD, FTIR and the pore structure measure), it can be concluded that :(1)The activity of modified β is higher than MCM-22, but the selectivity of ethylbenzene is lower about 3% than that of MCM-22;(2)The mounts of diethylbenzene and the other by-products are higher 1.7 times and 1.5 times than these of MCM-22 respectively;(3)The catalytic performance of zeolite mixture is nearly equal to modified β, but the selectivity of ethylbenzene is higher about 0.5% than that of modified β;(4)The catalytic activity of zeolite is mainly correlated with the number of acid sites, strength and distribution, and the distribution of products is determined by the binding energy of ethylbenzene and the pore structure, while the stability of catalyst is affected by the amount of poly-ring aromatic alkylate and the pore structure.

以性能评价和特性表征（XRD、TPD、FTIR和孔结构测定）相结合的方式，对上述三种催化剂性能比较的结果表明：（1）改性的活性明显高于MCM-22，但乙苯选择性却低于MCM-22绝对差约3%；（2）改性(上二乙苯和其他副产物的生成量分别约为MCM-22上对应值的1.7和1.5倍左右；（3）混合型催化剂的性能与改性相仿，但乙苯选择性提高0.5%左右；（4）对乙苯合成，沸石催化剂的活性主要取决于其B酸中心数、酸强度及酸分布，产物分布则取决于催化剂表面的乙苯脱附能垒值和孔道结构，而稠环芳烃的生成量和催化剂孔道结构是影响催化剂稳定性的主要因素。

Nearly all the subjects took longer to brake while multitasking and scored lower on the test.

在一心多用的情况下，几乎所有参与者在刹车时的反应时间都延长了，而且在数学测验中的得分也更低。

Methods Chicken embryo allantois membrane was used in the experiment. Breast cancer cells were inoculated on the superior surface of CAM sac, then the vascular tissues were collected in lower sac after incubation.

通过鸡胚尿囊绒膜实验和骨条黏附实验确定BSP的高稳定表达对乳腺癌细胞血管侵袭能力及骨条黏附能力的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。