查询词典 reagents

In the Presence of uncoupling reagents water stress had little effect on the photosynthetic electron transport in mesophyll cells of Iwpoea batatas, but in the absence of uncoupling reagents it promoted the electron transport and displayed pronounced uncoupling effect.

在有解偶联剂存在时，水分胁迫对叶肉细胞的光合电子传递没有影响，但在无解偶联剂存在下，水分胁迫促进了甘薯叶肉细胞的光合电子传递，表现出明显的解偶联效应。

The main results are as the following: 1. Different reagents are used to modify the 568nm-emission QDs and there influences on the optical qualities of QDs are discussed. A good method of modification by which the excellent optical qualities of QDs are kept is found. 2. The water-soluble QDs were linked to the antibodies using the coupling reagents ethyl-3- carbodiimide and N-hydroxysuccinimide.

具体包括的内容如下： 1讨论了不同修饰剂及它们的组合对量子点表面进行修饰后，量子点光学性质的影响，发现对于最大激发波长为568 nm的量子点，应用巯基十一酸与巯基乙酸钠组合对其修饰后，得到的水溶性量子点保持了脂溶性量子点的优良光学性质，其量子点产率相对于其他修饰剂或组合也比较高。

Results showed that cultivation of milk vetch significantly lowered concentrations of heavy metals and soil comprehensive pollution index, and more or less the same as the treatments of organic reagents, except for effect on decreasing Zn and Cd concentrations and comprehensive heavy metal pollution index, which were not so big in scale. When compared with the treatment of milk vetch + organic reagents, the treatment of milk vetch did not differ much in heavy metal concentrations and comprehensive pollution index. Elsholtzia splendens Nakai ex F.

结果表明，紫云英处理显著降低土壤重金属浓度和土壤综合污染指数，下降幅度与CK比呈极显著差异；除土壤Zn、Cd浓度和土壤重金属多因子综合污染指数的下降幅度显著低于有机试剂处理，其他与有机试剂处理均无显著差异；紫云英处理与&紫云英＋有机试剂&的交互作用处理相比，土壤重金属浓度和土壤综合污染指数的下降幅度无显著差异。

The use of chemical reagents on the grass to deal effectively break their dormancy, in order to clear the wild Pennisetum Eragrostis seeds and seed germination characteristics, determined to promote both the growth of grass seed germination and effective way to wild Pennisetum and Eragrostis large seed production and provide a basis to promote the use of this test, mainly through chemical reagents soaking, combined with a certain degree of mechanical processing, so as to achieve to break the dormancy of seed dormancy and promote germination and growth of its purpose.

利用化学试剂对草种进行处理能有效打破其休眠，为了明确野生狼尾草种子和大画眉草种子的发芽特性，确定促进这两种草种萌发和生长的有效方法，为野生狼尾草和大画眉草的种子生产和推广利用提供依据，本试验主要通过化学试剂浸种，并结合一定的机械处理，从而达到打破休眠种子休眠、促进其萌发和生长的目的。

And then the two different turfgrass seed germination tests conducted, results show that: 0.1 percent concentration of hydrogen peroxide concentration of 0.01% of the "Bi-care" and the concentration of 0.29 percent for the "God LU Hong Lu," The three kinds of reagents soaking treatment can significantly improve the wild Pennisetum and Eragrostis seed germination and growth of 0.10 percent by the concentration of the soaking H2O2 solution, then 0.29% concentration of the "God LU Hong Lu" after soaking solution, wild Pennisetum Eragrostis seeds and seed germination energy, germination percentage, germination index, root length and were significantly higher than control to deal with the seeds, but also to varying degrees higher than the other chemical reagents used to deal with the seeds, rapid germination and tidy.

然后对两种草坪草不同的种子处理进行了发芽试验，结果表明：浓度为0.1%的过氧化氢、浓度为0.01%的&碧护&和浓度为0.29%的&鲁虹神露&这三种试剂浸种处理能显著提高野生狼尾草和大画眉草种子的萌发和生长，经浓度为0.10%的H2O2溶液浸种，再经浓度为0.29%的&鲁虹神露&溶液浸种处理后，野生狼尾草种子和大画眉草种子的发芽势、发芽率、发芽指数、根长和芽长均显著高于空白对照处理的种子，也不同程度的高于用其他化学试剂处理的种子，发芽快而整齐。

The results showed: Fragilaria brevistriata had the highest average difference in temperature to respond to heavy metals, it was 0.24 ℃ that was 0.05 ℃ high more 0.19 ℃ of together average difference in temperature of eight kinds of algae to respond to heavy metals; The percent of Fragilaria brevistriata responding better to the reagents was 80% that was the highest in eight kinds of algae; The average response time of Fragilaria brevistriata responding to the reagents was 4.65 min that was low more 5.21 min of together average response time of eight kinds of algae; Fragilaria brevistriata' sensitivity was between 0.06 mgL^(-1) and 7.0 mgL^(-1), and the luminescent bacteria' sensitivity was between 0.07 mgL^(-1) and 15.3 mgL^(-1), so Fragilaria brevistriata had lower dose to respond to the heavy metals.

结果表明：平均响应温差短线脆杆藻最大，为0.24℃，高出8种藻的0.19℃总平均温差0.05℃；较好药品响应率短线脆杆藻最高，为80%；平均响应时间短线脆杆藻居中，为4.65min，低于8种藻的总平均响应时间5.21min；短线脆杆藻对重金属的灵敏度在0.06~7.0mgL^(-1)之间，发光细菌在0.07~15.3mgL^(-1)之间，表明短线脆杆藻对重金属响应的剂量低。

The results showed polymeric diaryliodonium salts were effective aryl ion transfer reagents. Thirdly, a new type polymer supported hypervalent iodine reagents poly { [4-Hydroxy iodo] styrene} has been developed. It was an effective oxidative reagent, and could be applied to the one pot synthesis of 4-arylthiazoles.

然后，我们以聚苯乙烯羟基对甲苯磺酰氧基碘苯为原料，成功制备了一类新型聚合物高碘试剂—聚苯乙烯负载的炔基碘盐，并研究了其作为炔基转移试剂的有效性：(1)该试剂可对硫、氮、硒等负离子进行亲电炔基化反应，合成炔基亚砜、0，0-二烃基二硫代磷酸炔基酯、1-苯乙炔基苯并噻唑以及炔基硒醚。

In this new technology,on the basis of substituting flotation froth of high intensity scavenger concentrate for high intensity middlings,the desired RE concentrate can be obtained easily,which does not take any special measures of removing surplus reagents and adopts the current technological process taken by workshop of RE ore dressing,and the cost of flotation reagents per ton RE concentrate can also be reduced about 50%.

将生产中所用的稀土浮选原料强磁中矿更换为强磁扫选精矿的反浮泡沫，不需特别的脱药措施，只采用稀选车间现有的工艺流程和浮选药剂组合方案，即可获得所需的稀土精矿，使每吨稀土精矿的成本降低一半左右。

For very long time, many research groups focus on using more than a stoichiometric amount of a chiral auxiliaries to obtain high enantioselectivity. There were mainly two sorts of processes reported on highly catalytic asymmetric addition of Grignard reagents to aldehydes. The former case was to transform Grignard reagent RMgX into other organometal reagents such as R_2Zn and R-Ti derivatives via complicated procedures at extremely low temperature. The later case was to link a chiral ligand to Mg in the form of organomagnesium amides or use chiral amine ligand catalyzing the alkylation of aldehydes.

格氏试剂对醛的不对称加成的报道大多需要大量的手性助剂以获得高的光学活性，而高度催化的格氏试剂对醛的不对称加成主要通过两种途径进行：一种是把格氏试剂转化成其他的有机金属试剂如R_2Zn和R-Ti化合物再对醛进行加成，反应通常在低温下进行；另一种是利用手性镁胺作为中间体或直接用手性胺催化来完成此反应。

Because there are many articles about organozinc reagents react with aldehyde, we investigated the preparation of bisorganozinc reagents and its reactions.

第一章：有机卤化锌试剂在有机合成中研究进展本章主要对有机锌试剂，特别是带官能团的有机卤化锌试剂的产生、发展、制备及其在有机合成中的应用作了详细的综述。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。