变色

Copper and copper prevent discoloration protective agent, copper prevent oxidant, galvanization passivation blocker, silver protectant, LED silver protectant, prevent discoloration, gold, silver, and gold, protective agent, we hole of tin additive is not completely, and formaldehyde environmental protection coating resistant color effect very good, long time in the air will become yellow, oxidation.

铜保护剂、铜防变色剂、铜防氧化剂、镀锌钝化封闭剂、银保护剂、LED银保护剂、银防变色剂、金保护剂、金封孔剂，我们的各种锡添加剂完全是不含甲醛环保型，并且镀层抗变色效果很好，长时间在空气中不会变黄、氧化。

Change countenance the plastics cup is my department at oneself produce of feeling change countenance material of foundation top the hair open of new product, cup's being pour into hot water or cold water will change countenance and change into another color from a kind of color.

变色塑料杯是我司在自身生产的感温变色材料的基础上发开的新产品，杯子在倒入热水或冷水都会变色，从一种颜色变为另一种颜色。

The manufacture process of reversible thermochromatic paper and its mechanism of color-change were summarized in details in this paper, the extensive application of the paper was also introduced.

阐述了可逆温致变色纸的制备方法及其变色机理，并介绍了可逆温致变色纸的应用。

Immersed in anti-tarnishing solution and coated with lacquer as replacement for traditional chromating, anti-tarnishing property of siver deposit was improved greatly.

浸渍抗变色液，涂覆抗变色油漆、代传统重铬酸盐钝化较好地提高了镀银层的抗变色性能。

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。

In this study, we developed the ammonia sensing material by using MCM-41 impregnated with bromocresol green. MCM-41 is one kind of mesoporous molecular sieves. It can be applied to many fields due to well-defined pore shapes, narrow distribution of pore sizes, large pore volumes, high surface area, excellent thermal, hydrothermal, chemical and mechanical stability. And the bromocresol green dye is commonly used as a pH indicator with colorimetric from pH 3.8 to pH 5.4.

本研究之目的是结合变色染剂及中孔洞分子筛MCM-41进行氨气吸附，研究中所选择之变色染剂溴甲酚绿是一种偏酸性之大分子有机染剂，其变色范围在pH 3.8到pH 5.4；而MCM-41由於其孔洞大小分布范围狭窄、孔洞体积大、高比表面积、具有良好的吸附容积、表面反应性强及易於改质等优点，故期望利用此复合材料，经气体吸附达到氨的移除并同时在吸附饱和前能产生显色效果。

At present, the investigation about this aspect is concentrate on the pure inorganic cathodal electrochromic materials like WO3 and organic electrochromic materials like Prussian blue and Polyaniline.

关于这方面的研究却主要集中在以WO_3为代表的一元无机阴极电致变色材料和普鲁士兰、聚苯胺为代表的有机电致变色材料上，对多元的电致变色材料的研究较少。

At present, the investigation about this aspect is focused on the pure inorganic cathodal electrochromic materials as WO_3 and organic electrochromic materials as and Polyaniline and viologens. But for the organic-inorganic doped electrochromic materials, the research is very lack.

目前关于电致变色材料的研究主要集中在以WO_3为代表的无机阴极电致变色材料和以聚苯胺和紫罗精为代表的有机电致变色材料上，对有机-无机多元掺杂的电致变色材料的研究不多。

On the basis of previous work in our laboratory, several novel thiosemicarbazones and semicarbazone compounds containing pyrazolone-ring have been synthesized.

本文在实验室原有工作的基础上，合成了以吡唑啉酮环为变色主体的缩氨基脲、氨基硫脲类有机光致变色化合物，通过对固态光致变色性质和晶体结构的研究，深入分析了它们的变色机理，并总结了光致变色性质与之间结构的关系。

In this paper, the type of paulownia stain is identified, and on the basis of it, the study is carried out on the reasons of paulownia wood stain, way, law, and the research is also on tend of the change of wood components during the process of stain, the probe provide the theoretical evidence for paulownia wood stain control.

本文主要对泡桐木材变色类型进行鉴别测定，同时在此基础上，深入研究了泡桐木材变色原因、变色历程、变色规律，并揭示了泡桐木材变色过程中木材成分变化趋势，为泡桐木材变色防治提供了理论依据。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。