Indicator A substance used to test for acidity or alkalinity of a solution by a color change.

指示劑：是一種用顏色的變化來(lái)表示溶液中酸堿程度的物質(zhì)人人人人人人人人人干干干干干干干干干我。

The degree of acidity versus alkalinity in the body's environment must be maintained at a stable level.

人體的內(nèi)環(huán)境酸堿度必須維持高度穩(wěn)定。

We transformed RMgBr into R-Ti derivatives with the production of byproduct MgBrO~(i-Pr at the same time, but we didn\'t need romove the Mg salt by centrifugation or chelating reagents, for bis[2-(N,N-dimethylamino)ethyl] ether could chelate with Mg atom and thereby reduced the Louis acidity of Mg salt, so we used R-Ti derivatives produced in situ to alkylate the aldehydes induced by BINOL-Ti complexes..

我們通過(guò)利用TiO~(i-Pr_4使格氏試劑轉(zhuǎn)化成烷基鈦中文字幕无码永久无线无码，同時(shí)產(chǎn)生具有親核加成促進(jìn)作用的副產(chǎn)物MgBrO~(i-Pr射射射老司机插插插，由于BDMAEE能與MgBrO~(i--Pr絡(luò)合降低其路易酸活性禁16无码黄片，所以不需要離心或者借助絡(luò)合試劑完全除去鎂鹽，而使用原位生成的烷基鈦在BINOL-Ti誘導(dǎo)下對(duì)醛進(jìn)行不對(duì)稱加成国产综合色在线视频区天天综合色。

Molybdenum-glycol complexes synthesized with different alkylene glycols and Mo/alcohol ratios have different acidity and catalytic activity. For the topic reaction, the catalytic activity of Mo-1, 2-ethandiol or Mo-1, 2-propanediol is higher than that of Mo-butanediol.

結(jié)果表明拍拍欧美性爱，用不同的二醇和不同醇／鉬比制備的鉬醇催化劑具有不同的催化性能和酸性，用乙二醇和丙二醇制備的催化劑操逼视频免费91，催化性能優(yōu)于丁二醇制備的催化劑欧美性影院。

The study of 9－12 indicate that it is easy to get polyoxomolybdate with organic amine at weak acidity conditions when there are organic amine and organic acid in the same reaction systems.

化合物 9－12 的研究結(jié)果表明，在弱酸性條件下性欧美丰满熟妇XXXX性双飞，同時(shí)存在有機(jī)酸和有機(jī)胺時(shí)网站最国产2020最新，易形成含有機(jī)胺的鉬氧簇，而有機(jī)酸不易進(jìn)入產(chǎn)物晶相亚洲天堂在线视频aaa。

Using mordern physical chemistry techniques (such as XRD18禁三级片网免费看、 TG-DTA、 IR黑人跟日韩少妇性交aaa免费视频网直播、 XPS and 〓Xe-NMR)色哟哟一区二区三区视频、 chemical adsorption techniques (NH〓-TPD、 H〓-TPDWWAVA一片、 TPO97碰碰色、 TPR etc.) and pulse flow microreaction of n-hexane、 methylcyclopentene and n-hexane containing 0.2ppm thiophene, we studied mainly the following three points:(1). the changes occured during the calcination pretreatment of Pt ammine complex supported on β and L zeolites;(2). the effect of structure and acidity-basicity of zeolite on the dispersion and electron state of Pt particles; and (3). the influence of second metal component on the reactivity of nhexane aromatization and sulphur-resistance of Pt/L zeolite catalyst. Several interesting and valuable results are obtained and summerized as follows

本論文運(yùn)用各種近代物理表征方法(XRD黄色小电影在线资源、BET在线黄网视频、TG-DTA、IR免费線上看国产黄色网站、XPS和〓Xe-NMR)2019年黄片视频、化學(xué)吸附技術(shù)(NH〓-TPD、H〓-TPD欧美大片A片在线观看免费、TPO黄色av人人干、TPR等)和正己烷、甲基環(huán)戊烷及含噻吩正己烷的脈沖微反等方法2017人人摸，著重研究了(1)載Pt的β和L沸石在分解預(yù)處理過(guò)程中發(fā)生的變化日本视频www.；(2)沸石載體結(jié)構(gòu)及酸堿性對(duì)Pt粒子分散及電子狀態(tài)的影響；(3)第二金屬組份對(duì)載Pt沸石催化劑上正己烷芳構(gòu)化及抗硫性能的影響等91精品麻豆，得到了某些有意義的結(jié)果AⅤ免费一级。

Effect of acidity of aqueous phase and different ammoniation rates of extractant on the total mass transfer coefficients based on the water phase have been investigated The results showed that the mass transfer coefficients of Zn and Cd decreased but that of rare earth increased with the increasing of the ammoniated rate of extractant.

考察了料液酸度、萃取劑濃度以及萃取劑不同氨化度對(duì)鋅在线超碰、鎘傳質(zhì)系數(shù)的影響无码AA在线。

Meanwhile, proper addition of the rice brans using quantity is also an effective way for reducing the amylum content and the acidity.

加大糠殼用量也是降低淀粉含量和降酸的措施之一，但應(yīng)控制量无码自拍日韩视频。

The determination of free acidity with the presence of rare ,uranium,thorium andiron,etc is studied.

研究了在稀土蒙古老熟女刚交BBW，鈾视频亚洲日韩欧美，釷及鐵等元素存在下自由酸度的測(cè)定，標(biāo)準(zhǔn)回收完全亚洲欧洲久久久国产精品无码，適用于稀土料液自由酸度的測(cè)定

Some remedies off the kitchen shelf, such as drinking aniseed and water, cumin and water, and chewing on cloves or cardamom could relieve acidity.

一些補(bǔ)救過(guò)廚房貨架色综合另类，例如喝酒、大料水国内精品自线一区在线、孜然和水a变态另类久久9999性，對(duì)丁香、檳榔或豆蔻酸可以減輕中文字幕视频日韩高清在线。