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降解产物

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Moreover, based on the detection of intermediate species, the mechanism of benzene photolysis was discussed.

还分析了苯降解产生的中间产物,探讨了苯的降解机理。

The conclusions were as follows: theνO-H andνC=O IR absorption maxima shifted towards higher wave numbers after imprinting 17β-estradiol on TFMAA-co-TRIM copolymer with the red shift of theνO-H groups being apparent after precipitation polymerization for 16h while that forνC=O groups being observed after polymerization for 24h. A strong interaction between TFMAA and 17β-estradiol was confirmed by the high selectivity for 17β-estradiol, as indicted by the values of the separation factor of isomers of 17β-estradiol/17α-estradiol (2.28) and the imprinted factor (3.01). Particle diameter of TFMAA-co-TRIM polymer was between 300 nm and 1.5μm, which suited well for solid phase sorbent throughout at low column pressure. The recognition of imprinting TFMAA-co-TRIM polymer for sterol molecules was driven by enthalpy eluted with acetronitile, and low temperature was in favor of the separation of sterol structure analogues on imprinting column. TFMAA-co-TRIM polymer possessed of determinate anti-heat stability, with melting point beginning at 255.84℃, Tp=257.40℃, control TFMAA-co-TRIM polymer and imprinting TFMAA-co-TRIM polymer were respectively decompounded at 267.79℃and 343.11℃, and solid micro-extraction noddle prepared by the special polymerization also showed definite recognition for 17β-estradiol by GC/MS detecting at 270℃. By selection of various washing and elution solvents, elution reagents of close polymerization system were of more advantage in template molecules retention and recognition on molecularly imprinted solid phase extraction column. At a certain extent, progesterone, 17α-estradiol, 17β-estradiol and 4-androstene-3, 17-dione could be intercepted on the MISPE column. Especially, MISPE had high selectivity for progesterone, and imprinting TFMAA-co-TRIM polymer could achieve adsorption balance within 50 min by absorption kinetics test for 17β-estradiol. However, MISPE column showed better selectivity and enrichment property for 17β-estradiol than C18 and CSPE columns according to the data from HPLC and GC/MS analyses. Recovery of 17β-estradiol on MISPE column was up to 85.5% while when prime extracting solution of milk powder was sampled, the recovery of CSPE and C18 columns were 43.7% and 30.7%, respectively.

通过研究阐明:紫外聚合产物TFMAA-co-TRIM中的νO-H振动吸收峰在聚合16h后红移,νC=O振动吸收峰在聚合24h后红移;TFMAA-co-TRIM对雌二醇异构体的印迹因子达到了3.01,α为2.28,优于其它功能单体参与得到的聚合物识别特性;TFMAA-co-TRIM聚合物粒径介于300 nm至1.5μm之间,作为色谱固定相具有良好的通量和低的柱压;在乙腈流动相中,TFMAA-co-TRIM分子印迹固定相的分离过程主要被焓驱动,低温有利于分子印迹固定相分离甾醇结构类似物;TFMAA-co-TRIM分子印迹聚合物在255.84℃时开始熔融,Tp=257.40℃,聚合物CP的降解温度在267.79℃,MIP降解温度在343.11℃,制备的固相微萃取头初步经GC/MS 270℃的耐热性测定;不同的洗提溶剂筛选证明了选择接近聚合溶剂的洗脱体系更有利于MISPE发挥识别效应;分子印迹固相萃取柱对孕酮、17α-雌二醇、17β-雌二醇和雄烯二酮都具有不同程度的保留特性,可作为此类化合物的吸附材料,特别对孕酮强保留的富集特性,可作为孕酮的选择性识别吸附剂,其分子印迹聚合物对17β-雌二醇的吸附动力学测定显示在50 min内基本达到吸附平衡,具有作为传感器核心敏感材料的潜力;对比萃取奶粉中17β-雌二醇性能,MISPE柱比非分子印迹固相萃取柱和C18柱具有更高的保留,回收率依次为85.5%,43.7%和30.7%。

These results show the modified active carbon as catalyst of microwave degradation of methylene blue has many advantages such as rapid degradation, low cost, no intermediate product and no secondary pollution, and is fit for massively dealing with dyestuff wastewater.

结果表明,改性活性炭作为微波降解亚甲基蓝的催化剂具有降解速率快,成本低,没有中间产物生成和不会造成二次污染等优点,适合于大规模治理染料废水。

The production of coal degradation by white rot fungus was also studied.

还对白腐真菌对煤降解转化产物进行了元素分析,在此基础上探讨了白腐菌对煤生物降解转化的规律。

The production of coal degradation by white rot fungus was also studied. Based on these studies, the degradation law of coal biodegradation was also worked out.

还对白腐真菌对煤降解转化产物进行了元素分析,在此基础上探讨了白腐菌对煤生物降解转化的规律。

Meanwhile, Azoxybenzene was also detected by GC-Mass from the extracts of culture fluids with dichloromethane, which conformed the probability of the existence of two metabolites: nitrosobenzene and N-phenylhydroxylamine. Because Azoxybenzene might be yield from the reaction of these two compounds under the catalytic influence of alkali.

另外通过GC-MS测定硝基苯降解液的二氯甲烷提取物,测到氧化偶氮苯的存在,它能在碱的催化作用下由亚硝基苯和N-苯基羟胺反应生成,所以它的存在从反面证实了降解中间产物亚硝基苯和N-苯基羟胺的存在。

However, we should further investigate the degree and eventual result of degraduation of the cement, and optimum n-HA content for human.

但是,我们还应该进一步研究该材料降解的最终产物和降解程度,以及最适合于人的n-HA的含量。

The features of molecular structure of aromatics, resins and asphaltenes were investigated by ruthenium-ion-catalyzed oxidation, where involatile acid products were methylated with excess diazomethaneether and volatile acids were esterified with phenacyl bromide.

利用钌离子催化氧化方法对大港减压渣油芳香分、胶质和庚烷沥青质进行了选择性降解,通过GC、GC-MS等分析手段对降解反应产物中一元正构脂肪酸、α,ω-二元正构脂肪酸和苯二~六元羧酸的含量和分布分别进行了定量分析。

This paper provides a comprehensive survey of the chemical structures of all glucosinolates which have been identified up to now, summarizes the processes of their conversion to isothiocyanates and other products by myrosinase,and discusses the various factors which affect their degradation to special products.

介绍了迄今已发现的硫甙的化学结构,以及通过芥子酶的作用,硫甙降解成异硫酸氰酯和其他产物的途径,讨论了影响硫甙降解的因素。

A preliminary study on substrate specificity of Lumbricus Bimastus nucleaseTo measure degrade rate of DNase E to several different substrate in optimal reaction condition to demonstrate the substrate selectivity of DNase E. Agarose gel electrophoresis was used to investigate the products of DNase E processing double strands cyclic DNA to investigate the action of DNase E.

双胸蚓组织核酸酶底物特异性的研究测定DNase E在最适反应条件下对不同底物的降解速率,证明DNase E降解底物的选择性;应用琼脂糖凝胶电泳对DNase E水解双链环状DNA后的产物进行鉴定,阐明DNase E的水解方式。

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