discoloring

a new kinetic discoloring spectrophotometry for the determination of titanium(ⅳ) was developed, which was based on the catalytic discoloring effect of titanium(ⅳ) on the oxidation reaction of methyl red by hydrogen peroxide in dilute sulfuric acid medium.

在硫酸介质中，痕量钛（Ⅳ）能催化过氧化氢氧化甲基红褪色，用分光光度法测定了催化反应与非催化反应速度的变化，从而对该反应进行研究。

The mechanism of the improvement and discoloring the adsorbents andthe additive was elucidate.

从理论上阐述了提高粉煤灰基质多孔吸附材料吸附、脱色性能的机理.

Please have the side out for airing under sun to prevent it from discoloring.

如果您想到太阳下晒一晒您的地毯,请背面晒,不要正面晒,防止燥色.

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.

xylitol can be produced from the corn cob through acid hydrolysis, neutralization, evaporation, discoloring, ion exchanging, concentrating, crystallization and reproduction from mother solution.

以玉米芯为原料，用酸水解，经中和、蒸发、脱色、离子交换、加氢、浓缩、结晶并将母液进行再处理可生产出木糖醇。

determination of trace niobium in rare earth mineral by inhibiting methyl red discoloring spectrophotometry

阻抑甲基红褪色光度法测定稀土矿石中痕量铌

a new method for the determination of penicillamine was proposed. it was based on the inhibitory effect of penicillamine on discoloring reaction of h_2o_2 and methyl red catalyzed by fe~ ( 3+) in dilute sulfuric acid solution.

在H2SO4介质中，Fe（Ⅲ）能催化H2O2与甲基红之间的褪色反应；加入青霉胺后，青霉胺又能灵敏地阻抑该氧化褪色反应，从而建立青霉胺的测定方法。

Not so long ago, chemical engineers discovered how to use titanium dioxide to keep buildings free of discoloring pollution.

不久前，化学工程师发现了如何用二氧化钛来防止建筑物的脱色性污染。

The act of discoloring something. cause to become sallow, as of complexion.

一种使事物变色的行为。使肤色变成菜的颜色。