共查询到19条相似文献,搜索用时 78 毫秒
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制备了添加不同纳米二氧化钛(TiO2)含量的竹粉/聚氯乙烯(PVC)复合材料,研究纳米TiO2对复合材料力学性能和抗菌性能白子影响,结果表明,纳米TiO2能显著提高复合材料的力学性能,且赋予材料对大肠杆菌和金黄色葡萄球菌很好的抗菌性能;当纳米TiO2质量分数为1.2%时,复合材料的抗菌率大于90%,抗菌效果显著;当纳米TiO2质量分数为1.6%时,复合材料的抗菌率均超过了99%,且复合材料具有良好的抗菌长效性. 相似文献
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纳米TiO2具有强氧化性和亲水性,在抗菌剂方面有广泛的应用前景。由于TiO2的带隙能较高,需在紫外光照射下有较好的抗菌效果,目前国内外学者采用金属及非金属离子掺杂的方法改进TiO2在可见光下的光催化活性,增强纳米TiO2抗菌剂在可见光下的抗菌能力,本文对纳米TiO2抗菌剂改性研究情况及其在抗菌塑料中的应用情况进行了综述。 相似文献
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纳米TiO2光催化作用的影响因素及应用现状分析 总被引:5,自引:0,他引:5
研究了纳米TiO2光催化作用机理,并从晶体结构、晶粒尺寸、表面修饰及复合等因素对纳米TiO2光催化性能的影响作了分析。综述了目前TiO2光催化剂在环境保护、杀菌抗菌、光电转换等方面的应用现状。 相似文献
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纳米TiO2是高效光催化剂,具有抗菌能力强、低毒性、抗菌速度快、颜色稳定性好、有合适波段光照射、有氧气参与及抗菌谱广等特点,且价格低廉、资源丰富。经过处理的纳米TiO2在聚合物基体中具有良好的分散性,且可以起到杀菌的作用,具有抗菌长效性。研究了纳米TiO2在氢化苯乙烯-丁二烯嵌段共聚物(SEBS)医用塑料薄膜中的应用。利用吹塑成型方法制备医用膜,并且对吹塑成型过程中的各种影响因素进行了研究。主要得到以下结论:最佳吹膜温度为200℃,SEBS最佳充油比为2∶1;加入TiO2后,断裂伸长率几乎不变,拉伸强度下降;加入TiO2后,紫外光下SEBS薄膜的老化速度明显加快;TiO2处理与否及各组分含量的变化对薄膜老化速度的影响很小。 相似文献
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介绍了纳米材料在抗菌塑料中应用的优点。综述了纳米TiO2抗菌塑料及其制品的发展状况。报道了近年来单一树脂基体和多种树脂基体的纳米TiO2抗菌塑料的研究和开发成果;纳米TiO2抗菌塑料制品的有报道的成果集中在塑料薄膜。 相似文献
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The efficiency of ozonation on the degradation of oxytetracycline, a veterinary antibiotic, has been investigated in both cow manure and synthetic animal feeding operation wastewater at varying experimental conditions. With a rapid degradation of antibiotic in synthetic wastewater, ozonation improved its biodegradability and eliminated bacterial toxicity caused by oxytetracycline. The degradation rate of oxytetracycline depended on pH and applied ozone dose, but not initial antibiotic concentration in wastewater. In the case of manure treatment, ozonation efficiency in terms of oxytetracycline degradation was negatively affected by moisture and antibiotic content of manure. The degradation rate of oxytetracycline in manure slowed down upon the extension of treatment time since ozone could not react with strongly adsorbed antibiotic on manure. Increase in humic and fulvic acid carbon and mineral nitrogen content was an indicator for the improvement of fertilizing value of manure by ozonation. 相似文献
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将具有消炎、抗菌功效的蛋白酶与乙基纤维素薄膜以化学交联法聚合形成抗菌性薄膜,并对其抗菌性能进行了研究。利用紫外分光光度计测定酶膜中的酶在275nm处的吸光度,并比较各种条件下酶的活性,从而研究蛋白酶-乙基纤维素薄膜的抗菌效力与持久性。 相似文献
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Songcan Chen Xiaomin Li Guoxin Sun Yingjiao Zhang Jianqiang Su Jun Ye 《International journal of molecular sciences》2015,16(10):23390-23404
Co-contamination of antibiotics and heavy metals prevails in the environment, and may play an important role in disseminating bacterial antibiotic resistance, but the selective effects of heavy metals on bacterial antibiotic resistance is largely unclear. To investigate this, the effects of heavy metals on antibiotic resistance were studied in a genome-sequenced bacterium, LSJC7. The results showed that the presence of arsenate, copper, and zinc were implicated in fortifying the resistance of LSJC7 towards tetracycline. The concentrations of heavy metals required to induce antibiotic resistance, i.e., the minimum heavy metal concentrations (MHCs), were far below (up to 64-fold) the minimum inhibition concentrations (MIC) of LSJC7. This finding indicates that the relatively low heavy metal levels in polluted environments and in treated humans and animals might be sufficient to induce bacterial antibiotic resistance. In addition, heavy metal induced antibiotic resistance was also observed for a combination of arsenate and chloramphenicol in LSJC7, and copper/zinc and tetracycline in antibiotic susceptible strain Escherichia coli DH5α. Overall, this study implies that heavy metal induced antibiotic resistance might be ubiquitous among various microbial species and suggests that it might play a role in the emergence and spread of antibiotic resistance in metal and antibiotic co-contaminated environments. 相似文献
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Haiyue Gong Dr. Weifeng Liu Dr. Magnus Carlquist Prof. Lei Ye 《Chembiochem : a European journal of chemical biology》2019,20(24):2991-2995
A new method has been developed to enhance the antibacterial efficiency of traditional antibiotics. Chloramphenicol-imprinted polymer particles were decorated with boronic acid to improve their binding to both Gram-negative and -positive bacteria. The polymer particles have a high antibiotic loading and provide a slow release of the antibiotic payload to deactivate the target bacteria. The boronic acid modified polymer particles not only contribute to enhanced antibacterial efficiency, but also have the potential to act as scavengers to remove unused antibiotic from the environment. 相似文献
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