酸值

These strains, which are able to produce acid, can make crude oil pH reducing by 0.54-0.98 units.

分离筛选出的3株菌株均具产酸能力，可以使原油pH值降低0.54-0.98个单位。

Hydrogen production of heat treatment sludge, acid treatment sludge, normal sludge, base treatment sludge and ultrasonic sludge from simulated wastewater by anaerobic sewage were investigated. The substrate containing glucose was treated with anaerobic heat treatment sewage sludge. The biohydrogen was produced through anaerobic hydrogen fermentation.

试验研究了酸处理、碱处理、热处理、超声波预处理厌氧污泥发酵产氢的产氢量，选择产氢量最高的热预处理后的污泥作为混合微生物系，以葡萄糖为基质，研究了温度、pH值、底物浓度对厌氧污泥发酵产氢量的影响。

The 60% H 2 SO 4 is used to produce ammonium sulfate and fertilizer, reducing the production cost. After counteracting with alkali to keep pH Value to be 6.5 ～ 7, the acid tar is conjugated in proportion with anthracene oil and heavy benzene to mixed oil or fuel oil.

稀硫酸用于硫铵和普肥生产以降低生产成本；酸焦油与碱中和 pH 值达到 6.5 ～ 7 后，与蒽油或重苯按一定比例配成混合油和燃料油。

Based on the dynamic composting process of wastewater sludge from China Resources Breweries Co., Ltd., the dynamics of different operational and evaluating indices, such as temperature, moisture content, pH, humic acid, total organic carbon, total nitrogen, water-soluble organic carbon and germination index and so on, during the treatment process were discussed. The results indicated that cottonseed cake used as compost amendment of brewery sludge.

为快速高效无害化处理啤酒厂污泥，对啤酒厂的污水污泥进行微好氧堆肥发酵处理工艺进行了研究，重点研究了啤酒厂污水污泥袋式堆肥过程中温度、含水率、pH值、腐殖酸、有机碳、全氮、水溶性有机碳、发芽指数等参数的变化规律。

TBN70 marine cylinder oil for two stroke cross head diesel engine with big power and low speed,is developed with the neutral oil from Xinjiang 0 # crude oil as base oil and the overbased calcium naphthenic acid from Dushanzi Petrochemical Subsidiary as the main detergent.

以独山子石化分公司生产的高碱值环烷酸钙为主要清净剂，以新疆 0 #原油生产的基础油研制适用于大功率低速二冲程十字头式柴油机的TBN70船用汽缸油。

The bioactivity of titania coatings before and after modification were investigated by simulated body fluidtests in vitro.X-ray diffraction,Scanning electron microscope,Fourier transform infrared spectroscope and Energy diffraction spectroscope were used to investigate the microstr...

结果表明：氧化钛涂层和钛合金基体的结合强度较高，其值高达40MPa，涂层的耐模拟体液腐蚀性优于钛合金。酸和碱溶液表面改性后的氧化钛涂层经模拟体液浸泡可在其表面生成含有碳酸根的羟基磷灰石，显示良好的生物活性。

In the end, the synthesis condition and influential factors of PU-titania (TiO2) process, such as manufacturing sol (including the amount of water, the amount of PU/Titanium butyrate, the concentration of the solution, the pH value, the kind of alcohol), aging process, theoretical analysis of the dipping process, dry and heat treatment of the gelation, were also discussed especially. FT-IR、SEM、TEM、DLS techniques were applied to analyze and study the reaction mechanism and watch the surface and section of the PU-TiO2 membrane. According to above, it was inferred that PU-TiO2 membrane (containing K600) was better composite.

本文采用原位合成法制备了聚氨酯-二氧化钛水分散复合体，并着重对影响制备稳定透明的复合体的因素（包括加水量、醇的加入量、pH值、聚氨酯/钛酸四丁酯投入量、醇种类）进行讨论，利用红外光谱技术分析聚氨酯-二氧化钛分散复合体的结构，动态光散射技术与扫描电镜分别表征复合分散体的粒径大小与分布及复合膜的表面形态，结果显示含K600的聚氨酯-二氧化钛体系复合情况良好。

It was found that introducing electron-donating groups, such as alkyls, weaken the electron-accepting ability of C60 and make its first reduction wave shifted to more negative position.

结果发现，引入推电子基团，如烷基，会使C60得电子能力降低，第一个还原电位有较大的负移；引入具有拉电子性质的基团，如羧酸酯基，则会部分抵消由於C60共扼结构被破坏而引起的电位负移，结果使得电位负移值减少。

Then we applied these chrial ligands to asymmetric borane reduction of w-bromoacetophenone and diketones.

将其应用于前手性单酮及二酮的还原中，其中双方酰化脯氨酸在1，6-二苯基-1，6-己二酮的还原反应中可获得最高为90％的ee值。

The potential of the dental crown to the middle point of dental root gradually reduced when the pH value of artificial saliva decreased.So adsorption of the cariogenic bacterium on the dental surface increased,incidence of the caries also possibly increasd.

本研究在人工唾液不同pH值时，通过对牙齿表面电位的测定，来观察牙齿表面电位随着人工唾液pH的变化，情况并探讨二者之间的关系，从而揭示酸的致龋机理，为龋病发病机理的研究提供一些实验数据。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。