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本文合成了8个未见文献报道的类似于氯虫苯甲酰胺的化合物——含硫氰基邻甲酰氨基苯甲酰胺类化合物,并用核磁共振氢谱、碳谱以及高分辨质谱予以表征。并且对这8个化合物针对小菜蛾和斜纹夜蛾的毒力进行测试并与氯虫苯甲酰胺进行对比,发现这8个化合物均对小菜蛾和斜纹夜蛾都具有较好的杀灭活性,尽管其活性比氯虫苯甲酰胺稍弱,但也非常接近,可以作为候选农药进行进一步考察。 相似文献
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取代脲类化合物具有多种特异的生物活性,诸如除草、杀虫、抗菌、植物生长调节活性[1~2]等,对该类化合物的合成及生物活性研究成为农药开发的热点,探索新的取代脲类化合物一直是许多化学工作者关注的课题[3~5]。目前,取代脲类化合物研究主要集中在脲桥上取代基的变化[4~5]和取代硫脲的活性[6~8]等方面,而对脲桥结构的改变或拓展研究鲜见报道。氨基甲酰脲是一类特殊的脲衍生物,具有明显的生物活性[9],以其为前体,合成具有氨基甲酰脲基本结构的化合物,改变脲桥结构或扩大取代脲研究范畴,从而探索新的有价值的农药或药物前体。三嗪基是多种除草… 相似文献
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采用无水相体系的胶体通过丝网印刷工艺制备TiO2薄膜电极,研究发现曲拉通(TritonX-100)可以明显改变TiO2电极显微结构,且对染料敏化太阳电池的性能影响显著.过少或过多的曲拉通都将导致开路电压、短路电流、填充因子以及效率的降低.由3gP25粉末配制的胶体中,曲拉通适宜的加入量约为0.8mL. 相似文献
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Triton X-100增敏光度法测定铝土矿中的微量钪 总被引:1,自引:0,他引:1
研究了在HCl溶液中微量钪(Ⅲ)-偶氮氯膦Ⅲ(CPAⅢ)之间的配合反应。结果表明,在0.5mol/LHCl溶液中和TritonX 100的存在下,有色溶液的最大吸收波长为680nm,表观摩尔吸光系数为2.62×104L·mol-1·cm-1。钪(Ⅲ)质量浓度在0~0.45mg/L范围内符合比耳定律,钪(Ⅲ)的加标回收率在98.0%~105.1%之间,RSD(n=6)为2.1%~2.6%。可用于铝土矿中的微量钪的测定。 相似文献
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TritonX-100-5-Br-PADAP光度法测定发样中铁 总被引:2,自引:0,他引:2
在表面活性剂Triton X-100存在下,以5-Br-PADAP作显色剂,光度法测定发样中铁,结果在所选浓度范围内线性关系良好,稳定时间长,回收率平均为98.14%。 相似文献
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AOT/Triton X-100混合反胶束体系中假丝酵母脂肪酶催化蓖麻油水解的活性 总被引:2,自引:0,他引:2
研究了二(2-乙基己基)琥珀酸磺酸钠(AOT)/Triton X-100混合反胶束体系中假丝酵母脂肪酶(candida rugosa lipase)催化蓖麻油水解的反应. 考察了Triton X-100占总表面活性剂的摩尔分数(x(Triton X-100))、水与总体表面活性剂的摩尔比(ω0)、pH值、反应温度以及底物蓖麻油的浓度等因素对酶活性的影响. 研究结果表明, 加入非离子表面活性剂Triton X-100可以使假丝酵母脂肪酶的活性得到显著提高, 但是当底物蓖麻油的浓度大于0.24 mol·L-1时, 会对假丝酵母脂肪酶产生抑制作用. 相似文献
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G. Geeraerts P. Joos 《Colloids and surfaces. A, Physicochemical and engineering aspects》1994,90(2-3):149-154
Considering surfactant solutions at concentrations exceeding the CMC, another relaxation process besides diffusion occurs, also affecting the dynamic surface tension. The latter equilibration process concerns a micellisation/demicellisation process, representing the disintegration of micelles into monomers. The micellisation kinetics are accounted for by adding a single source term to the diffusion equation of the free monomers.
In the present paper the integration of the diffusion equation is avoided by using the concept of the diffusion penetration depth. Nevertheless, when this approximation is made, good agreement is achieved between experiment and theory for micellar Triton X-100 solutions. Moreover, it follows that diffusion of micelles may not be neglected. 相似文献
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The influences of Triton X-100 on hemoglobin (Hb) behaviors were studied by the methods of UV-Vis spectrum, fluorescence spectrum, HPLC, conductivity, zeta potential and negative-staining transmission electron microscope in Hb/acyclovir/Triton X-100/H2O system. With the increase of Triton X-100 concentration in the system, the percentage of the free acyclovir increased from 58%--63% to 90%--94%. The static quenching constant and the association number of acyclovir to Hb decreased. The fluorescence spectrum, conductivity, zeta potential, fluorescence polarization and negative-staining morphology of Hb tended to recover to those of the original state of Hb in the same concentration of Hb. The interaction between Triton X-100 and Hb is stronger than that between acyclovir and Hb. Most Triton-X-100 was associated with Hb at low Triton X-100 concentration. But the interaction of Triton X-100 with Hb was apparently dominant in high Triton X-100 concentration. The Hb structure was unfolded and finally denatured. 相似文献
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Semidifferential electroanalysis is used as an effective method for investigating microstructure and structural transition of Triton X-100 microemulsions. 相似文献
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The effects of Triton X-100 molecule and micelle on the microstructure and properties of HSA are studied by the some methods of UV spectrum, fluorescence spectrum, fluorescence polarization, circular dichroism, conductivity, and zeta potential. With the increase of Triton X-100 concentration, the UV absorbance, fluorescence intensity of HSA, and the system conductivity all first decrease and then increase. The zeta potential of HSA first goes up and then down. The percents of the β-sheet, random, turn structures, and the polarization of HSA increase but the percent of the α-Helix of HSA decreases. When Triton X-100 concentration is more than 1.0×10−3 mol l−1, the structure parameters change obviously especially for the percents of random and turn structures. 相似文献
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表面活性剂在非水溶剂中聚集态的研究所见的报导与水体系相比要少得多.然而近年来对非水体系的研究日益增多.这是因为表面活性剂在非水溶剂中的应用日趋增加,但与水体系相反,对非水体系的性质了解甚少.对表面活性剂非水体系的研究还有助于对其聚集体的共溶剂效应有更深的认识.TritonX-100(以下简写为TX-100)是典型的非离子表面活性剂,在工业上有着广泛的应用.乙二醇在多醇中与水的化学结构最相近问,然而它却是水结构的破坏剂,加入少量的乙二醇会使水的冰点急剧下降.乙二醇又是蛋白质的变性溶剂.表面活性剂在乙二醇中的胶… 相似文献