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Characterization of Coal Tar Pitch and Paving Pitch by UV,EA and NMR

In order to enlarge the use of coal tar pitch(CTP) in paving road, CTP and 60th paving pitch (PP) were extracted by n-he......

期刊

coal tar pitch paving pitch quality characterization elemental analyses UV-absor

大黄三种有效成分对胰蛋白酶活性及结构的影响

大黄素、大黄酸、大黄酚对胰蛋白酶活性均有一定程度的抑制作用．当有效成分浓度为2．5mg·L^-1时，长濑法测定表明它们对胰蛋白酶的......

期刊

大黄素大黄酸大黄酚胰蛋白酶紫外吸收光谱荧光光谱圆二色谱 emodin rhein chrysophanol trypsin UV-absor

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