六价的

In conclusion, not only the methods and relative situation of extracting Cr from chrome slag but also the feasibility of producing yellow chrome by using chrome slag"s leachate were studied in this dissertation. All these study will provide necessary theoretical basis for the industrialization of producing yellow chrome from the chrome slag"s leachate.

本论文研究的创新之处在于：本研究以从铬渣中提取六价铬作为立足点，消除了解毒后的铬遇氧化条件毒性恢复的可能，利用回收的六价铬制取铬黄颜料的研究初步证明，该法不仅切实可行，而且成本低廉、效益好。

At diakinesis, 0.2 tetravalents, 0.05 hexavalents and 0.05 octovalents per pollen mother cell were detected, which was absent in cultivated cucumber. In 30% PMCs, crossed chromosomes occurred at diakinesis.

在减数分裂终变期，平均每个花粉母细胞有0.2个四价体、0.05个六价体和0.05个八价体，约30%的花粉母细胞中存在拉十字的染色体。

The trivalent chromium plating has been proposed for a long time.

实际上提出用三价铬代替六价铬的研究已经有很长时间。

Hexavalent chromium is the most toxic form, the toxicity of trivalent chromium than 100 times.

六价铬是毒性最大的形态，其毒性比三价铬高100倍。

Causes for the formation of hexavalent Cr in trivalent Cr electroplating process were analyzed.

分析了三价铬镀铬过程中产生六价铬的原因。

Recently, since hexavalent chromium has bad effects on environment, etc., research on the trivalent chromium plating has been accelerated.

近年来，由于六价铬对环境等方面带来污染影响，于是加紧了对三价铬电镀的研究。

The effect of antioxidants in preventing Cr formation in leather was studied by employing several kinds of antioxidants to treat leath er.

采用几种常见的抗氧化剂处理皮革试样，研究了抗氧化剂处理对皮革中六价铬含量的影响，探索了几种抗氧化剂预防皮革中六价铬的效果。

While high quality deposition from trivalent chromium electrolyte could only be sustained for short periods and thin deposits obtained of decorative value only, it is difficult to substitute heaxvalent chromium plating in engineering electrodeposits by trivalent chromium plating at all.

因此，本文在电沉积出镍-铁合金纳米晶的基础上，采用脉冲电沉积的方法研究了在三价铬体系中获得纳米晶铬和铬-镍-铁合金纳米晶厚镀层的工艺及其基础理论，以期解决三价铬镀液完全代替六价铬电镀的难题。

Mainly engaged in plastic plating technology research, development, production and processing, the company's main products are copper, bronze plating, nickel, nickel-plated black, and the plating of trivalent chromium 6 Trivalent chromium, and so on.

永翔五金塑胶有限公司主要从事塑胶电镀技术的研究、开发、生产及加工，目前公司主要产品有镀铜、镀古铜、镀镍、镀黑镍、镀三价铬及六价铬等。

In addition, UE/HPLC/ICP-MS equipped with anion exchange column to speciate Cr and Cr in the μg/L level. H2 and He were used as collision gas in the ICP-MS detection to reduce the interference of multiatomic ions for Cr-52 ion monitoring.

又为继续提高灵敏度，本研究也使用超音波震荡/阴离子交换管柱的高效能液相层析/感应耦合电浆质谱法将三价铬及六价铬分离，并且将侦测范围降低至μg/L。

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。