This article discussed the benzoic acid activated carbons which have changed the types and content of acid oxygen-function groups on the surface of activated carbons and their effect on the adsorption for Hg^0 in simu...This article discussed the benzoic acid activated carbons which have changed the types and content of acid oxygen-function groups on the surface of activated carbons and their effect on the adsorption for Hg^0 in simulated flue gas at 140 ℃. These surface acid oxygen function groups were identified by Boehm titration, Fourier transformation infrared spectrum, temperature programmed desorption and X-ray photoelectron spectroscopy. It indicates that the carboxyl, lactone and phenolic were formed when the benzoic acid is loaded on the surface of activated carbons. Among the surface acid oxygen function groups, the carboxyl groups enhance the adsorption capacities of Hg^0 for activated carbons to a greater extent.展开更多
熊果酸属于五环三萜类配合物,在自然界中分布广泛,并显示出多种生物活性,如保肝、抗炎、抗病毒、抗癌等多种药理作用.为寻找高效、低毒的熊果酸衍生物,以具有一定生物活性的熊果酸为先导配合物,通过对其C-28位进行结构修饰及C-3位引入...熊果酸属于五环三萜类配合物,在自然界中分布广泛,并显示出多种生物活性,如保肝、抗炎、抗病毒、抗癌等多种药理作用.为寻找高效、低毒的熊果酸衍生物,以具有一定生物活性的熊果酸为先导配合物,通过对其C-28位进行结构修饰及C-3位引入氨基酸,共设计合成了10种未见报道的熊果酸衍生物.目标配合物的结构经1 H NMR、IR和HRMS表征确证,并以其对培养于高铁血红蛋白的金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、耐喹诺酮金黄色葡萄球菌和培养于脑心浸液培养基中的大肠杆菌进行抑菌活性测试.结果表明,经修饰后的熊果酸衍生物对金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、耐喹诺酮金黄色葡萄球菌的抗菌活性较母体配合物有不同程度的提升.展开更多
文摘This article discussed the benzoic acid activated carbons which have changed the types and content of acid oxygen-function groups on the surface of activated carbons and their effect on the adsorption for Hg^0 in simulated flue gas at 140 ℃. These surface acid oxygen function groups were identified by Boehm titration, Fourier transformation infrared spectrum, temperature programmed desorption and X-ray photoelectron spectroscopy. It indicates that the carboxyl, lactone and phenolic were formed when the benzoic acid is loaded on the surface of activated carbons. Among the surface acid oxygen function groups, the carboxyl groups enhance the adsorption capacities of Hg^0 for activated carbons to a greater extent.
文摘熊果酸属于五环三萜类配合物,在自然界中分布广泛,并显示出多种生物活性,如保肝、抗炎、抗病毒、抗癌等多种药理作用.为寻找高效、低毒的熊果酸衍生物,以具有一定生物活性的熊果酸为先导配合物,通过对其C-28位进行结构修饰及C-3位引入氨基酸,共设计合成了10种未见报道的熊果酸衍生物.目标配合物的结构经1 H NMR、IR和HRMS表征确证,并以其对培养于高铁血红蛋白的金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、耐喹诺酮金黄色葡萄球菌和培养于脑心浸液培养基中的大肠杆菌进行抑菌活性测试.结果表明,经修饰后的熊果酸衍生物对金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、耐喹诺酮金黄色葡萄球菌的抗菌活性较母体配合物有不同程度的提升.
