In order to compare the properties of 2 stable chlorine dioxide disinfectants using different activators, malonic acid iodometry method and quantitative germicidal test were used for laboratory obser-vation.

為了比較用不同活化劑的兩種穩(wěn)定性二氧化氯消毒劑的性能国产91福利啪，用丙二酸碘量法和定量殺菌試驗(yàn)在實(shí)驗(yàn)室進(jìn)行了觀察。

A modified analysis method based on the determination of ozone—indigo disulphonate spectrophotometer(GB/T 15437-1995) in gas phase has been developed to detect the concentration of ozone in liquid phase. An analytical condition of λmax=612～615 nm,ε=20 000 L/, pH 2 is obtained by the titration of indigo disulphonate. Compared with potassium iodide method,it shows a higher precision and accuracy,CV＜3.0%. The results also prove that blank experiment will bring about 5.0%systematic error.

在氣相臭氧濃度的靛藍(lán)二磺酸鈉分光光度法(GB/T15437-1995)基礎(chǔ)上提出了液相臭氧濃度的測定方法色哟哟精品在线，采用靛藍(lán)二磺酸鈉標(biāo)準(zhǔn)曲線法代替采用易分解的臭氧標(biāo)準(zhǔn)曲線法色偷偷人妻系列，得出測定條件λmax=612～615 nm、ε=20 000 L/日韩s8精品无码久久久久影院、pH為2黄色另类视频，通過碘量法比較實(shí)驗(yàn)，說明新的測定方法具有較高的精度和準(zhǔn)確度人人操人人人人人人操人人人人人人操人人，相對(duì)標(biāo)準(zhǔn)偏差小于3.0%国产乱子伦一区二区三区；比較結(jié)果表明忽略空白實(shí)驗(yàn)將引入5.0%的系統(tǒng)誤差。

Using hydrochloric acid as a cheap catalyst,perfume methyl furoate was synthesized from methanol and furoic acid prepared from furfural,and was characterized by GC,IR and 1H-NMR.

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The effect of some experimental conditions including the acidification of water sample, the selection of absorption solution and gas separation on determination was discussed, which avoided the interference of iodometric method.

討論了水樣的酸化效果盗摄网址，吸收液選擇，氣體分離等實(shí)驗(yàn)條件對(duì)側(cè)定的影響a毛片网站全部播放，避免了碘量法所產(chǎn)生的干擾羞羞网在线。

The rheological property of a bisphenol A cyanate resin was investigated by means of parallel plate method, it was modified by isothermal precure process. The effects of precure process on the chemical structure of resin were studied by IR, DSC and GPC methods.

本文采用平板法研究了一種雙酚A型氰酸酯樹脂的流變特性，通過恒溫預(yù)固化的方法對(duì)其進(jìn)行改性亚洲黄色不卡视频，并借助紅外光譜黄色视频网址在线播放、差示掃描量熱法和凝膠滲透色譜法等手段分析了預(yù)固化對(duì)氰酸酯樹脂化學(xué)結(jié)構(gòu)的影響。

Test methods such as ATR, IR transmission method, Raman spectroscopy, DSC(Differential scanning calorimeter), X-ray diffraction are used to investigate the assemble structure of the modified silk materials. And its microstructure is observed by SEM. Stannic acid is used to characterize the microvoids in the silk fibers and the mechanical properties of modified silk fibers are also tested in the paper.

本文采用了透射和全反射兩種紅外光譜吸收法、激光拉曼光譜法观看免费人成视频网站、差示掃描量熱法色色色五月天大白腿导航、X射線衍射法等測試手段研究了改性真絲纖維的聚集態(tài)結(jié)構(gòu)，采用掃描電子顯微鏡法研究了改性真絲纖維的微觀結(jié)構(gòu)AⅤ激情网，采用錫酸處理法對(duì)絲纖維內(nèi)部的微孔進(jìn)行了表征天天色天天操天天摸天天抽，并對(duì)改性后真絲纖維的力學(xué)性能作了測試分析。

The improved activity of n-octane hydroconversion over PMo and Ni in situ encaged in the secondary pores of nano HZSM-5 can be attributed to the increase of acidic concentration and the synergistic effect of Bronsted and Lewis acid sites.

原位合成法和浸漬法制備的復(fù)合催化劑在辛烷臨氫轉(zhuǎn)化反應(yīng)中活性的改善源于總酸量的增加及Brφnsted和Lewis酸的協(xié)同效應(yīng)超碰在线8888。

Chlorine contents of the representative composition of MSW are quantitatively analyzed by using silver nitride volumetric analysis method, mercury thiocyanate spectrophotometer method and ion chromatography method etc, the results have been tabled and the determination methods are confirmed.

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Rabbit was immunized by the conjugated alginate-BSA (1.0mg/kg) for 40-days routine immunity method; ELISA method was used to examine the titration of anti-alginate serum; The first generation parotid acinar cells were chosen to divided five groups (group A :contrast, group B: BAS, group C: alginate, group D: anti-alginate serum, group E: alginate +anti-alginate serum), We examined the proliferation of each part by MTT method at four times (lh, 6h,12h and 24h); In the meanwhile, The growth and shape of parotid acinar cells were observed under phase contrast microscope and scanning electron microscope.16 of the immunized rabbits by alginate were divided equally into Al and Bl groups, 12 normal rabbits were divided equally into A2 and B2 groups as control groups, Each rabbit was affused by 0.3ml(40fil/ml)alginate though parotid duct once time two days.

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USY zeolite supports with different acid amounts were obtained by steam dealumination. Dual metal catalysts with a total loading of Pd and Pt of 1.15% were prepared by the ion-exchange method.

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