查询词典 cadmium

The report of their discovery, which happened by accident, appears in the communication "White-light Emission from Magic-Sized Cadmium Selenide Nanocrystals" published online October 18 by the Journal of the American Chemical Society.

从最新一期出版的《美国化学学会杂志》网络版的"白光从硒化镉纳米晶体中发射出来"的报道可以看出，他们的研究发现也是偶然间得到的。

With thioglycollic acid as stablizing agent, cadmium selenide quantum dots were prepared, and the coating of CdSe with polylactide was studied.

摘 要：以巯基乙酸为稳定剂，制备CdSe量子点，并考察聚乳酸对量子点的包被。

Cadmium Selenide is a Ⅱ—Ⅵ compound semiconductor with direct transition, wide-band-gap.

硒化镉是直接跃迁宽禁带隙的Ⅱ—Ⅵ族化合物半导体材料。

In this thesis, we extended study of controllable synthesis of cadmium selenide in a novel "green" way, fabrication of various CdSe core-shell structural composite QDs and study of the basic applications of the those composite QDs with excellent fluorescent effect in biomedical labeling, imaging and DNA biosensors as a new type of fluorescent probes .

本论文主要研究了制备CdSe纳米量子点的新型绿色制备工艺，构筑了多种核-壳结构复合量子点材料，并初步研究了利用复合量子点材料独特的荧光效应作为一种新型荧光探针，在生物标记成像和DNA生物传感器中的应用。

The results also showed that sodium selenite in low concentration can decrease the rate of apoptosis in SD rat kidney cells induced by cadmium.

低浓度的亚硒酸钠有一定的降低镉离子诱导细胞凋亡的作用。

Objective The purpose of this study was to investigate the joint effect of vitamin C,vitamin E or selenium on cell proliferation,lipid peroxidation and anti-oxidase enzymes induced by cadmium in LLC-PK 1 cells.

研究氯化镉(CdCl2 )及其分别与维生素C、维生素E、硒联合作用对猪肾近曲小管上皮(LLC PK1)细胞增殖、脂质过氧化及抗氧化酶的影响。

The groups say some Chinese companies routinely shortchange their employees on wages, withhold health benefits and expose their workers to dangerous machinery and harmful chemicals, like lead, cadmium and mercury.

这家组织说，有些中国公司常常克扣雇员工资，扣留劳保，并且让他们的工人直接暴露于危险的机器和有害的化学物品之下，比如铅、镉以及水银。

The analysis result indicated that the fish muscle in tuna, skipjack and sardine, the content of cadmium average out 30(7), 20(3), 22(8) ng/g respectively; the content of chromium average out 15(12), 17(12), 38(17) ng/g; the content of nickel average out 3(3), 10(6), 32(14) ng/g, and the content of lead average out 3(1), 1(1), 8 ng/g.

分析结果显示猫鲔鱼、鲣鱼、沙丁鱼罐头之鱼肉，镉含量平均值分别为30（7）、20（3）、22（8） ng/g；铬含量平均值分别为15（12）、17（12）、38（17）ng/g；镍含量平均值分别为3（3）、10（6）、32（14）ng/g；铅含量平均值分别为3（1）、1（1）、8ng/g。

The conventional calibration method and the standard addition method were compared in the assay of lead, cadmium, copper, and nickel in mineral Chinese medicines (borex, dragon teeth, oyster, smithsonite, and limonitium) by atomic absorption spectrometry.

传统中药大致可分为植物性、动物性及矿物性等三大类，本研究取自市售坊间常用种矿物性中药炉乾石、龙骨粉、牡蛎粉、硼砂、禹余粮等，以传统强酸氧化回流加热消化法。

The results showed that the different mass concentration of HPAM's absorbance decreases slightly when the PH value of the buffer solution is 5.0, but its reproducibility is better;In order to make the absorbance become more stable, the reaction time was identified adding proper quantities of bromine water, sodium formate and starch-cadmium iodide reagent to the solution separately; the mass concentration curve of the HPAM was draw, by means of the straight degree of the curves, the coincidence degree of the straight line about the concentration of every sampling point and so on , it shows that the mixer has good mixed effect compared with the standard curve.

如下是一些主要问题：1）文章的行文格式。文章没有按照一般科技论文的表述方式，如1是引言，2是常用方法，其实这都应该是第一部分引言里应该介绍的，引言中应扼要介绍文章的研究背景、目的，意义，采用的主要方法等。还有3是实验装置，4是实验步骤，应该这些都是第二部分，试验材料与方法。2）文章的内容。文章应主要介绍本研究的具体内容，但是本文没有，如3 实验装置部分，这个721分光光度计的原理与论文内容联系不大，根本没必要介绍，标准曲线的研究应该放在最前面等。3）文章的表述不清。如HPAM是何物，文章一直没有介绍，什么曲线的直线度、浓度与直线的重合度、什么加入溴水后的时间，应该是反应时间，总之表述不清！ 4）文章的图表。图标绘制的很难看。如图2，应该纵坐标起始点从0.25开始，这样图形就会美观很多，图3又没有纵坐标标注，还多了一个纵坐标等。5）文章的结论。文章的结论中有些严格来说不是结论，而是实验中的现象与操作注意事项。

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。