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The photocatalytic processes and the production of intermediates and by-products are examined by means of UV-vis spectra, proton-NMR profile, trapping ESR technique, GS-MS, Ion Chromatography,ξ-potential measurements, peroxide measurements and chemical oxygen demand measurements, etc. Some surprising fruitions are acquired for the first time.

借助紫外可见波谱、核磁、自旋捕捉ESR、色质联用、离子色谱、ξ-电位仪、过氧化物以及化学需氧量的测量等技术,对光催化过程及中间产物和付产物的生成进行了检测,获得了一些显著的成果。

For example: great-looking packaging decoration products, high-set of the journals and products.

粗陋的包装装潢产物、矮印数(50不一以上)的期刊和产物样本等。

At.the later stage the inerease in corrosion product scale thick- nces was sololy due to growth of iron oxides on the scale surface .

腐蚀产物膜生长到一定厚度后,扩散到表面的合金元素及铁的浓度降低到只有铁的氧化物在腐蚀产物表面生成。

The two competitive reactions both consist of two steps, two reactants firstly form a three-membered ring intermediate (INT1) and a twisted four-membered ring intermediate (INT2), respectively, both of which are barrier-free exothermic reactions of 41.5 kJ/mol and 72.3 kJ/mol; then INT1 isomerizes to a four-membered ring product (P1) via transition state (TS1), and INT2 results in the chlorine-transfer product (P2) via transition state (TS2), with the barriers of 2.9 kJ/mol and 0.3 kJ/mol, respectively.

INT1和INT2分别经过渡态TS1和TS2异构化为了四元环产物P1和生成了氯迁移产物P2,其势垒分别为2.9和0.3 kJ/mol。

The results indicated the ally1 carbon of cyclohexene was catalytically oxidized by molecular oxygen at atmospheric pressure in the presence of the polymer complex and a trace of HOAc at 70℃, which afforded corresponding alcohol, ketone and hydroperoxide acting as intermediate.

结果表明,70℃时,以微量醋酸为添加剂,在催化剂的催化作用下,以常压氧气氧化环己烯,得到烯丙基位的氧化产物环己烯醇、环己烯酮和中间产物环己烯过氧化氢。

The paper explains ultrasonic effect basal principle,and reviews the application of the ultrasonic technology active material extracts hit the target application condition in natural substance ,reaches the ultrasonic technology draw natural substance has draw rate high-speed,merit such as quick and not change effective component.

简述了超声波作用的基本原理,综述了超声波技术在天然产物活性物质提取中的应用情况,得出了超声波技术提取天然产物活性物质有着提取率高、速度快且不改变有效成份等优点。讨论了超声波提取中应注意的问题

In order to ascertain Auto-circular fermentation technology of Mulberry vinegar and find out the vinegar 's ability to eliminate DPP H ., the liquid fermentation techniques of Mulberry vinegar, produced by using Auto-circular fermentor , have been analyzed and the micro-organism on the Mulberry fruit surface has been observed with microscope, the total flavones content as well as the free radical-DPPH eliminating ability in several kinds of vinegars have been tested.

为了确定桑椹醋自回淋发酵工艺,并了解其对 DPPH 自由基的清除能力,以秦巴山区桑椹为原料,采用液态自回流发酵法生产桑椹醋,从原料菌群、酒精发酵主产物和醋酸发酵主产物的动态变化趋势等方面对其工艺进行了分析,并采用比色法对桑椹醋总黄酮含量及其 DPPH 自由基的清除率进行了测定。

Both two complexes exhibit the monomeric solvated structure, whichis determined by elemental analyses, IR, MS and 〓.

产物经元素分析、红外光谱、质谱、〓分析表明是单核溶剂化产物,其组成式为〓。

One pair of primers that amplified the gB gene of pseudorabies viruswas designed and synthesized.PCR technique detecting the DNA of PRV was established after selecting the best reaction conditions.This technique was applied to specifically amplify the 281 bp DNA fragment of the PRV strains including Fa,Fb,Bartha,BJ,GD,V2F4,S,S3,SR,Buk,Shope,Norden,Mink Ⅲ,HB,F8,F9 and F12 in cultured samples.The negative results were achieved from Vero cells,swine vesicular disease virus,hog cholera virus,Japanese encephalitis virus,porcine reproductive and respiratory syndrome virus,porcine parvovirus,foot and mouth disease virus F29 strain,O3I3 strain,T509 strain and O Ⅱ MF249 strain.The results of sequencing showed that the PCR method was of specificity.The sensitivity of PCR reached 15.8 pg of PRV Fa strain DNA.The tissue samples obtained during 1994 and 2000 were detected,and the results showed that the sensitivity of PCR was more sensitive than virus isolation and the Sandwich ELISA.The PCR was applied to detect 191 tissue samples from 31 pig farms obtained from Guangdong,Fujian,Hainan Provinces during 1999 and 2000,50 samples(26.2%)were positive and 22 pig farms(71%)were positive.

根据伪狂犬病病毒gB基因的序列,设计并合成了一对引物,以闽A株细胞培养毒为模板,筛选最佳反应条件,建立了检测PRV的PCR方法应用该方法对Fb、Bartha、BJ、GD、V2F4、S、S3、SR、Buk、Shope、Norden、MinkⅢ、HB、F8、F9、F12等毒株的细胞培养液进行基因扩增,均获得了分子量为 2 81bp的特异性目的DNA片段,而对Vero细胞与FMDV、SVDV、HCV、PRRSV、JEV、PPV等病毒进行检测,结果均为阴性,没有出现交叉反应对PRV毒株扩增的产物测序,结果序列与文献报道一致,证明PCR扩增产物和方法的特异性对 1994~ 2 0 0 0年期间送检的临床样品和保存的PRV毒种,用病毒分离、双抗体夹心ELISA和PCR等 3种方法进行检测,结果前 2种方法检测为阳性的,PCR检测均为阳性;PCR检测为阴性,前 2种方法检测也为阴性;可是,前 2种方法检测为阴性的,PCR却检测出部分阳性;经x2 检验,证明PCR检出率明显高于前 2种方法的检出率对PRV闽A株细胞毒提取物DNA进行检测,其最低检出量为 15 8pg 对 1999~ 2 0 0 0年期间广东、福建、海南等省的 31个大中型猪场送检的 191份病料进行检测。

The Li/Mn ratio of product and synthesis temperature are the key factors affecting the electrochemical characteristics of resultants.

合成产物中的Li/Mn比例及合成温度是影响合成产物电化学性能的关键因素。

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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