催化作用

The degradation of acid grain black dye by sonophotocatalytic oxidation with nanometer TiO 2 and ultrasonic wave has been studied.

对超声波作用下的纳米TiO2光催化氧化法降解酸性粒子元青染料进行了研究。

A new strain of Brevibacterium casei with high nitrilase activity was screened from natural environment and could convert nitrile into carboxylic acid.

从自然源筛选到的一株腈水解酶产生菌乳酪短杆菌，能够高选择性地将腈转化为羧酸，初步研究了该菌株所产的腈水解酶在游离细胞形态下的催化特性，包括热稳定性、pH稳定性、金属离子和添加剂的作用、溶剂耐受性及底物特异性等。

Stimulative effects of metallic compounds on industrial sewage sludge combustion and the sludge with acid washing treatment were studied by thermogravimetric analysis. The combustion characteristics index and kinetic parameters were calculated before and after adding different metal compounds. The catalytic effects and mechanism of combustion were discussed.

用热重法研究了不同金属化合物对含工业污水污泥的助燃作用，计算了添加不同金属化合物前后污泥燃烧的特征指数和燃烧反应动力学参数，并以酸洗污泥作为对比，对不同金属化合物的助燃效果和催化机制进行了分析。

In order to study the aldol condensation of 2.15-hexadecanedione on the surface of aluminium, the intermolecular condensation mechanism of acetone occurring on aluminum was simulated by using semi-empirical AM1 method embodied in MOPAC 6.0 program package. The optimized structures and geometry parameters of 5 transition complexes and 4 intermediates were given.First, 2 molecules of acetone coordinated with aluminum by electrostatic attraction.One atom of hydrogen of acetone migrated to aluminum because of t...

为了研究2，15－十六烷二酮在氧化铝表面的环合机理，选择小分子丙酮为模型化合物，用量子化学半经验AM1方法研究双分子丙酮在氧化铝表面的醛醇缩合机理，给出了反应过程中的5个过渡态和4个中间体的结构和几何参数，该催化反应可以认为是氧化铝分子与两分子丙酮分子发生静电络合作用，然后借助氧原子的负电荷导致脱氢并实现缩合，根据中间体的能量变化，推测有较稳定的铝复合物生成。

First, 2 molecules of acetone coordinatedwith aluminum by electrostatic attraction . One atom of hydrogen ofacetone migrated to aluminum because of the pulling of the negativeoxygen of aluminum, and then aldol condensation occured.

该催化反应可以认为是氧化铝分子与两分子丙酮分子发生静电络合作用，然后借助氧原子的负电荷导致脱氢并实现缩合。

Besides, n-butyl and sec-butyl tosylate that are difficult for oxidative addition can react with phenylmagnesium bromide to form corresponding cross-coupling products. Primary alkyl halide which contains β-hydrogen and is relatively hard to undergo the reaction , n-butyl chloride for instance, can react with aryl Grignard reagents in the presence of NiB alloy as well.

此外，难以进行氧化加成的对甲苯磺酸正丁酯和对甲苯磺酸仲丁酯可以与苯基溴化镁作用生成相应的交叉偶联产物；反应相对困难的含β-H的伯卤烷，如：正氯丁烷也可以在NiB催化下与芳基格氏试剂发生偶联。

The company's automation and control products in the CX system of centralized control shaft are Jiantong Nanjing Cement JT energy saving and environmental protection-type large-diameter shaft (§3.8x8.5 meters,§4.0x8.5 meter shaft) fixed-point matching products applies to Nanjing Jiantong Guantang Ltd., Guangxi Pingguo Wanganui Cement Co., Ltd. all JT energy saving and environmental protection-type on large-diameter shaft; the company independently developed CX-JM15C coal environmental protection agents, dedicated to catalytic coal cement shaft kiln calcined, and its coal effect and Kiln Burning can improve working conditions, improve clinker production quality, reduce cost of production of clinker 3-5 yuan / ton clinker; company also provides enhanced FGF efficient composite cement grinding aids, Products has two kinds of solid and liquid, has good strength and grinding role.

公司的自动化控制系列产品中的CX立窑集中控制系统是南京建通水泥公司JT节能环保型大直径立窑（Ф3.8x8.5米，Ф4.0x8.5米立窑）的定点配套产品，应用于南京建通官塘有限公司、广西平果万佳水泥有限公司等所有JT节能环保型大直径立窑上；公司自主开发的CX-JM15C环保节煤剂，专用于水泥立窑催化节煤煅烧，其节煤效果明显，并能改善立窑煅烧工况，提高熟料产质量，降低熟料生产成本3-5元/吨熟料；公司还提供FGF高效复合水泥增强助磨剂，产品有固体和液体两种，具有良好的增强和助磨作用。

In the medium of H2SO4 with KBr as the catalyst, the color of Cresol Red oxidized by iodate can be faded, and the degree of color fading is proportional to the concentration of iodine and the linear range of determination is 20 μg/25 mL~50 μg/25 mL.

在硫酸介质中、在溴化钾催化条件下，碘酸根对甲酚红有褪色作用，且褪色的程度与碘酸根的量有关，碘定量测定的线性范围为20μg/25mL～50μg/25mL，检出限为6.57×10-1μg/25mL，回收率为98.1%～104.2%。

Photoregeneration of activated carbon was attributed to desorption and photodegradation of adsorbates.

活性炭光再生是吸附质解吸和光催化降解共同作用的结果。

The kinetics of reconstitution of apoacylase with either 〓 or 〓 and the inactivation of the 〓 reconstituted enzyme by 1, 10-phenanthroline has been studied by following the substrate reaction continuously in presence of the metal ion or OP respectively. Although the native 〓-containing and the 〓-reconstituted enzymes have closely similar Michaelis constants and maximal velocities, the kinetics for both the inactivation by OP and the reconstitution of the apoenzyme with the metal ions differs considerably.

虽然钴重组的氨基酰化酶与天然含锌的氨基酰化酶在催化活性上比较相近，但两种酶在去金属失活动力学机制以及去金属失活的氨基酰化酶与两种金属离子重组复活的动力学过程均存在较大的差异，说明锌在氨基酰化酶中的作用比较复杂，并不能完全由钴替代。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。