变色的

With low molecular weight and simple structure, AphA has predominance in studies on dynamic states of reversible photochromism and photoswitch design.

细菌光敏色素AphA具有高效可逆光致变色性质，其分子量小，结构简单，在研究可逆光致变色的动态过程和设计光控分子器件等方面具有优势。

In order to force the leaf color to change, we need to understand how leaves change color in the fall. In short, the temp drops and blockage in the veins is formed inside the leaves and it stops water from reaching every corner of the leaves. Then the chlorophyl disappears and they are replaced by those red and yellow pigments.

为了迫使叶子变色，我们就必需要了解它在秋天是如何变色的，简言之，温度下降阻碍叶片中的叶脉形成，因而停止了水份到达它的每一个角落，叶绿素跟著消失，而被红色和黄色的色素所取而代之。

Objective: This paper was designed to study the pathology process in discolored gingiva adjacent to porcelain fused to metal crowns.

目的 ：研究金属烤瓷修复体毗邻变色牙龈组织的超微结构变化，探究牙龈变色的病理生理过程。

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。

Since photochromic ma-terials have extensive application prospect in science, technology, and daily living, studieson photochromism are very important.

由于光致变色现象在科学技术和日常生活中具有非常广泛的实际用途，因此对光致变色的研究不仅在理论上，而且在实际应用上都具有重要意义。

So it has become all-important to design and synthesize novel pyrazolone derivatives with excellent photochromic properties in the solid state and study the photochromic properties and photochromic mechanism.

因此设计并合成能够在固态发生光致变色的化合物，对其光化学性质、结构与性能之间关系的研究以及光致变色机理的探讨有着十分重要的意义。

MethodThe qualitative analysis to the acetone extractives of silver chain wood before and after discoloring was carried on showing the main components of the acetone extractives and then taking comparison.

方法］通过对刺槐木材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。

The methods and the precesses of the silver anti-tarnishing ,such as extremely thin metal coating,anodic passivation treatment,cathodic electrophoresis,chemical passivation and self-assembled monolayer,have been evaluated.

分析了银器表面在硫化物、硫氧化物等腐蚀性气体环境中变色的机理和影响因素，讨论了银器表面处理防变色(贵金属或合金的涂层、阳极化钝化、阴极电泳、化学钝化、自组装单分子膜的防腐蚀等)的方法和加工技术，并提出了包装贮存材料处理防银器变色的新途径。

Silver electroplating of beryllium bronze with thiosulfate was used to replace conventional toxic silver plating with cyanide in accordance of the characteristics of the beryllium bronze .

从分析铍青铜材料的特殊性入手，针对性地采取有效的前处理工艺措施，以硫代硫酸盐镀银取代传统的有毒的氰化镀银，分析了银镀层变色的原因并提出了相应的抗变色处理措施。

The heat-chromism was studied and the reaction mechanism was presented according to electron paramagnetic resonance spectrum and Fourier transform-infrared spectroscopy.

研究了它们的热致变色行为，并根据红外光谱和电子自旋共振谱提出了不可逆热致变色的反应机理。4。

The physiology of the skin machine body for the sake of the environment in the maintenance stability, but eject a body metabolism creation of metabolism thing BE'grease', summer perspire many various skin disease light or good, autumn perspire little metabolism thing metabolism don't go out, various skin disease made, this be the skin machine body of various burning disease.

皮肤机体的生理为了维持内环境稳定，而排出身体代谢产生的代谢物是'油泥'，夏天出汗多各种皮肤病就轻或好了，秋天出汗少代谢物代谢不出去，各种皮肤病就犯了，这就是皮肤机体的各种炎症。

If I had anything tender in me, I shot it dead.

如果我有什么招标的话，我枪死亡。