The structural and photocatalytic properties of TiO〓 as well as surface acidity were greatly improved by sulfation. SO〓〓/TiO〓 solid superacid with Hammett constant Ho less than -12.14 was prepared by treating the TiO〓 with 1.0mol. L〓 sulfuric acid solution and then calcining at 450℃ for 3h. When compared to unmodified TiO〓, the SO〓〓/TiO〓 superacid catalyst exhibited higher anatase content, smaller crystal size, higher specific surface area, centralized pore size distribution, and the blue-shifted band edge of uv-vis adsorption spectra. Furthermore, the SO〓〓/TiO〓 superacid also showed excellent reaction activity and stability for CH〓Br photocatalytic decomposition even under the moist reaction conditions. The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.

研究結果表明：SO〓〓與TiO〓表面的結合為螯合式雙配位結構99国内精彩视频；TiO〓光催化劑表面經H〓SO〓浸漬處理后人人爱人人操av，提高了表面酸性日韩一级A片一在线播放，改善了催化劑結構和光催化性能久久久久久网视频，當H〓SO〓浸漬濃度為1.0mol.L〓、燒結溫度為450℃時又粗又长又刺激黄色网站，可制得SO〓〓/TiO〓超強酸催化劑(H〓＜-12.14)AAAA一,黄片，其結構和光催化活性得到明顯改善，與TiO〓相比婷婷五月天开心激情网，SO〓〓/TiO〓光催化劑的銳鈦礦含量高中国一级大黄片强奸与乱伦、晶粒小、BET比表面積大五月丁香人人插、孔徑分布集中98欧美精品系列一区二区、光譜吸收邊藍移，具有優(yōu)異的光催化氧化活性乱婬网站、穩(wěn)定性及抗?jié)裥阅苋蘸访佬越细咔迨悠得夥芽矗獯呋到怃宕淄榈谋碛^量子效率比TiO〓催化劑提高了一個數量級，是一種有實際應用前景的高效光催化劑超碰97人人摸人人操人人看；由此提出了SO〓〓/TiO〓超強酸催化劑表面集團協(xié)同作用的超強酸中心模型毛片免费新网站，認為在SO〓〓/TiO〓超強酸催化劑表面，由SO〓〓誘導的相鄰L酸中心和B酸中心組成了集團協(xié)同作用的超強酸中心免费在线黄色性爱视频，其集團協(xié)同作用顯著地增強了催化劑表面酸性在线免费看a片、增大了表面酸量及O〓吸附量、促進了光生電子和空穴的分離及界面電荷轉移成人黄色电影免费观看，具有可逆吸附水的性能小蝌蚪视频国产成年网站，是SO〓〓/TiO〓超強酸催化劑具有優(yōu)異的光催化氧化活性、很好的活性穩(wěn)定性及抗?jié)裥阅艿闹匾颉?/p>

Under technological conditions such as: room temperature, current density 200 A/m^2, anolyte acidity 0.5 mol/L chlorhydric acid, acidity of catholyte 1.5 mol/L chlorhydric acid, circulation of anolyte and catholyte 40 L/h, Ni(superscript 2+) concertration 0.85 mol/L, and the average cell voltage 1.3 V, the electricity consumption of dissolving a ton of nickel base alloy is 813 kWh, and the Ni(superscript 2+) retention rate of the ion exchange membrane is more than 99.5%.

在電流密度200 A/平方公尺欧美老熟妇太爽在线视频、陽極酸度0.5 mol/L尤物成人最新电影在线观看免费网站、陰極酸度1.5 mol/L、循環(huán)量40 L/h永久黄色视频、Ni(上標 2+)濃度0.85 mol/L左右和室溫的條件下電解西西WWW大胆高清视频，平均槽電壓1.3 V，電溶1 t鎳合金板耗電813 kWh国产在线黄色小，陰離子交換膜對鎳的截留率大於99.5%日韩精品欧美精品国产精品。

Based on the problems of low viscosity index and the acidity increasing in the lubricating base oil,it has been found that the unstable quality of the crude oil was the root cause to effect on the quality of the base oil by analysis for long time;the low viscosity index and the higher acidity were resulted from the low paraffinicity and the high content of aromatics,cyclane.

針對潤滑油基礎油相繼出現(xiàn)的黏度指數降低、酸值升高等問題欧美性多多，跟蹤分析了潤滑油基礎油質量扒开双腿疯狂进出爽爽爽网站，認為原油的變化是造成潤滑油基礎油質量變化的根本原因；基礎油組成中烷烴含量降低性xxxx淫乱，芳烴和環(huán)烷烴含量上升是其酸值上升和黏度指數下降的內在原因人人操人人湿人人干。

In some range,the addition of chitosan and titriable acidity after deacidification appears linear correlation,1 g chitosan can absorb 0.41 g titriable acidity, but chitosan only can absorb citric acid and malic acid, and it has no effect on quinic acid.

在一定范圍內，殼聚糖的加入量與降酸后酒液的滴定酸呈線性關系日韩色情精品一区-AV，1 g殼聚糖可以降低0.41 g／L的滴定酸欧美一级在线观看欧美大片，但殼聚糖只能吸附主要有機酸中的檸檬酸和蘋果酸思思99思思久久最新精品，對奎尼酸無作用。

It is a organic hexahydric weak acid. In different acidity, the dissociation degree and the color of reagent solvent were different also. Determined and draw the absorption curve of reagent in varies acidity, and figured out the dissociation constant by Perisic-Janjic method; the complex ratio of the reagent and bismuth was determinated by mole ratio method and continuous variation method; The apparent stability constant of the complex was calculated, the mechanism of dissociation and coordination were discussed.

2jjzz中国jjzz，6—二溴4—硝基偶氮氟胂是本實驗室合成的測定鉍的一個較好的試劑www、αV、COm，對其進行了進一步的研究，在用柱層析法對其進行了提純后国产91九色，測定了試劑在不同酸華東師范大學碩：l：學位論文摘要度下的吸光度和最大吸收波長色色视频网页大全，繪制了其吸收曲線，用Perisic一Janjic法計算了試劑的六級離解常數日本韩国一级欧美在线；用摩爾比法和連續(xù)變化法測定了試劑與秘形成的配合物的絡合比：計算了配合物的表觀穩(wěn)定常數欧美激情熟妇在线精品，研究了其離解和配合機理，為篩選高效有機顯色劑提供了理論依據97洗澡人人澡人人爽人人摸。

In the synthesis of canthaxanthin by selective catalylitic oxidating of βcarotene,CO2 was used as acidifying or alkalizing agent,which controlled reacting system acidity and protected polyene.,producing less by-products and increasing catalylitic oxidation selectivity.In the addition reaction of isoprene with hypochloric acid,1-chloro-2-methyl-3-buten-2-ol and l-chloro-2-methyl-3-buten-4-ol were made by controlling of the acidity with carbon dioxide i...

CO2作為酸堿調節(jié)劑和惰性氣體久久精品中文字幕乱码…，在β-胡蘿卜素催化氧化合成角黃素反應中，可以控制反應體系酸性热久久中文字幕少妇，保護原料中的雙鍵，減少副反應發(fā)生国内外自拍偷拍，提高催化氧化反應的選擇性亚洲色淫淫网；異戊二烯氯醇化生成1-氯-2-甲基-3-丁烯-2-醇和1-氯-2-甲基-3-丁唏-4-醇反應中，CO2代替有機酸作酸堿調節(jié)劑97视频在线公开，控制次氯酸的生成速度国产精品久久久狼友，達到調控反應的目的，反應條件溫和国内外外激情精品99，不副產固體男人天堂网址在线。

MethodsIn the solvent of 1 mol/L NaOH,using the reaction of the total components of water-soluble phenolic acidity in Danshen and the NaNO2-Al(NO3)3,the total components of water-soluble phenolic acidity in compound Danshen preparation(calculated with protocatechualdehyde )were determined by colorimetric spectrophotometry.

方法利用丹參中水溶性酚酸類成分與NaNO2-Al(NO3)3在堿性條件下的顯色反應，比色法測定復方丹參制劑中水溶性酚酸的總量999国产一区二区三区。

MethodsIn the solvent of 1 mol/L NaOH, using the reaction of the water-soluble phenolic acidity in Radix Salviae Miltiorrhizae and the NaNO_2-Al(NO_3)_3, the total components of water-soluble phenolic acidity in Radix Salviae Miltiorrhizae injections and drip solution(calculated with protocatechualdehyde) were determined by colorimetric s...

方法利用丹參中水溶性酚酸類成分與亞硝酸鈉和硝酸鋁溶液在堿性條件下的顯色反應黄色A片大全，比色法測定該兩種制劑中水溶性酚酸的總量。結果原兒茶醛在3.336~14.46mg/L范圍內呈良好的線性關系日韩国产欧美精品毛片，回歸方程為：A=0.02777C+0.01279(r=0.9996)性插进去啪啪视频呢，加樣平均回收率為100.8%，RSD為0.96%久久久91精品国产一区传媒。結論該法簡便快速人人爱人人操人人爽，結果準確，重現(xiàn)性好欧美日本韩国国产，可用于該制劑的質量控制停停爱久o。

The logarithm difference values of partition coefficients of the compounds in butyl ether/water and in cyclohexane/water system were used for the measurement of the Lewis acidity, while the logarithm difference values of partition coefficients in trichloromethane/water and in tetrachloromethane/water system were used for the measurement of the Lewis basicity, and they were used successfully to differentiate the relative strength of Lewis acidity and basicity for 59 benzene and its derivates.

以化合物在正丁醚/水和環(huán)己烷/水溶劑體系中分配系數的對數差作為酸性指數，以其在氯仿/水和四氯化碳/水溶劑體系分配系數的對數差作為堿性指數久久久www，提出了一種新的度量有機物Lewis酸堿性的方法思思热尤物在线视频最新地址，按此方法成功地區(qū)分了59種苯系物Lewis酸堿性的相對強弱国产大片午夜一级毛片；并成功地將上述酸堿性指數引入定量結構—性質/活性相關研究之中，探討了苯系物的正辛醇/水分配系數青春草在线视频一区二区三区、水溶解度和土壤有機碳吸附系數等常見理化性質與其Lewis酸堿性間的相關性并建立了相應的定量模型真人一级黄色视频，發(fā)現(xiàn)它們之間存在良好的相關性。

Firstly, based on the acidity balance equation in ecosystem, together with the steady state mass balance equations of sulphur and nitrogen, formulae for calculating critical loads of not only acidity and sulphur, but also acidifying nitrogen and nutrient nitrogen were educed.

基于原有的生態(tài)系統(tǒng)酸度平衡關系亚洲是图综合，并結合臨界狀態(tài)下硫和氮的穩(wěn)態(tài)質量平衡欧美一级黄色视频A片，推導出計算酸度、硫国内黄色a片不卡、酸化氮和營養(yǎng)氮臨界負荷的公式欧美浓毛老太乱人伦视频在线。