六价的

In this study, Fe and sodium dithionite solutions were added into Cr-spiked soils and their effects on the decrease of availability of Cr were investigated.

本研究旨在探讨将Fe或连二亚硫酸钠（Na2S2O4）等化学还原剂施於Cr污染之碱性土壤，降低有效性六价铬含量的效果。

Hexavalent Chrome Cr-VI when used as a passivate.

作为钝化使用的六价铬。

The traditional chromium plating has carried through according to the technology of Sargent.

由于Sargent电镀铬工艺存在阴极电流效率低，分散能力和深镀能力差，以及六价铬离子带来的对操作工人身体的危害和严重的环境污染等问题，近年来发展了三价铬电镀工作。

IF THE RESULT OF SPOT TEST IS POSITIVE, CHROMIUM VI WOULD BE DETERMINED AS

若点测试的结果为阳性反应，则直接判定为测试样品含有六价铬。

A varnish used for coverlay was prepared with special epoxy resin, carboxyl-terminated acrlonitrilebutadiene rubber and phosphorated flame retardant. To conform to the requirements of RoHS, the halogen-free flame-retarded coverlay does not contain Stibium, lead, mercury, cadmium and chromium Ⅵ.

摘 要：采用端羧基丁腈橡胶增韧改性特种环氧树脂体系，配合使用添加型磷系阻燃剂得到覆盖膜用胶液，以此制备的SF305C无卤阻燃型覆盖膜不含锑和铅、汞、镉、六价铬等有害重金属，满足欧盟RoHS指令要求。

Effects of Cr(superscript 6+) of different concentration on growth and physiological characteristics of corn seeds were measured.

主要研究了不同浓度六价铬胁迫对不同玉米种子萌发和部分生理特性的影响。

It has been suggested that Cr may be a component of glucose tolerance factor in vivo.

六价铬和三价铬，作为环境中存在的同一种元素的不同形态，对人类却有着不同的影响。

A diphenylcarbazide photometry with the bromocresol green as the internal standard for the determination of chromium in the water has been developed.

采用溴甲酚绿为内标，二苯碳酰二肼光度法测定水体中的六价铬。

Thus, SRB were likely to reduce sulfates to sulfides simultaneously with petroleum oxidization, and directly or indirectly reduce hexavalent uranium U to tetravalent uranium U to precipitate pitchblende.

于是，利用烃类作为生存的碳源，硫酸盐还原菌将硫酸盐还原的同时，直接或间接地把六价铀U还原成四价铀U，导致沥青铀矿形成。

At present, China's export of tea in the international market value per kilogram of only about 2 U.S. dollars, the average price of tea in India as a low IV, a low六成more than Sri Lanka, and even more than the price of tea in Kenya is even lower 20%.

目前，中国出口茶叶在国际市场上每公斤仅值2美元左右，平均茶价比印度低四成，比斯里兰卡低六成多，甚至比肯尼亚的茶叶价格还要低20%。

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。