查询词典 discoloring

A new method has been studied that the trace Pd in ammine medium catalyzes the discoloring reaction between indigo carmine and potassium periodate.

发现痕量钯在氨性介质中能催化高碘酸钾与能红之间的褪色反应，研究了反应最优化条件和动力学参数。

The finish is brush and varnish to keep it from rustiness and discoloring.

其安装非常方便、快捷。

The paper carries on qualitative analysis to the acetone extractives before and after discoloring, shows the main components of the extractives and then takes comparison. The results shows :①The hydroxyl is oxidized and then shifted to the carbonyl,carboxyl, ester and ketone groups during inducing discoloration under the pretreatment conditions,which makes the wood color deep;② There are plenty of auxochromic groups in the acetone extractives of silver chain, the interaction between the auxochromic groups and the chromophoric groups makes the wood color deep.

摘 要：本文通过对刺槐变色前后丙酮抽出物的定性分析，得出变色前后丙酮抽出物的主要成分，进行对比分析，初步得出抽出物对诱发变色的作用为：①变色前后羟基在预处理条件下氧化成羰基，羧基，酯基和酮基等官能团，使木材颜色加深；②刺槐丙酮抽出物的主要成分中含有大量助色基，这些基团会与木素中的发色基团相互作用，使木材颜色加深。

Using microorganism fermentation cultivation technique, with escherichia coli strains of ASP - 311 for fermentation, with rich fumaric acid as the substrate to ferment produce l-aspartic acid, Study the result of activated carbon, and the temperature, the use of bleaching time and discoloring pH value of various conditions, aspartic acid decoloring effect, and finally: the concentration of carbon, decoloring temperature of 1.0% 60 degrees, the bleaching time for 0.5 h, pH for 6, in this condition, the result is the absorbency of decolour 3.2%, to achieve the best effect.

本文利用微生物发酵培养技术，以大肠杆菌ASP-311为发酵菌株，以富马酸为底物来发酵生产天冬氨酸；研究了发酵液中活性炭的使用量、脱色的温度、脱色的时间以及pH值等各种条件对L-天冬氨酸脱色效果的影响，最终得出：活性炭的浓度为1.0%，脱色温度为60℃，脱色时间为0.5h，pH为6，在此条件下，发酵液的吸光度为3.2%，此时的脱色效果达到最佳。

The paper discussed different effects (such as oil-water ratio, extraction ,mixing time, equipment time and so on) on the removal efficiency of COD and the acidity of raffinate, and the effect of active carbon dosage and temperature on the discoloring efficiency.

实验探讨了油水比、萃取混合时间、静置时间等因素对COD去除率及酸度的影响，研究了活性炭加入量及温度对脱色效果的影响。

And, in fact, some algae can be harmful without discoloring the water.

而事实上，有些藻类可以有害却不会使水变色。

And, in fact, some algae can be harmful without discoloring the water.

而且事实上，有些有害藻类不会使水变色的。

This is because a discoloring agent composed of a high polymer structure has been added to the clothing material.

热敏变色衣料颜色会随温度变化而不断变化，这是因为在衣料中添加了由高分子材料制成的变色剂。

This is because a discoloring agent has been added to the cloth cover , and when the temperature changes within a certain range , the high polymer structure in the discoloring agent changes and thus causes the change of color .

这是由于布面中加入了变色剂，当温度在一定范围内变化时，变色剂中的高分子结构发生改变，从而引起颜色的变化。

Fog: Darkening or discoloring of a negative or print, or lightening or discoloring of a reversal material.

灰雾：底片或拷贝片变暗或变色，或者是反转片变亮或变色。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。