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柑桔内生拮抗细菌的发酵液对油菜菌核病的田间防治效果   总被引:2,自引:0,他引:2  
从柑桔健康组织中分离得到两株内生拮抗细菌"重桔1号"和"元石45",制成细菌悬浮液, 25℃恒温水浴振荡培养72h, 喷雾于接有油菜菌核病菌的油菜成株叶片上,以喷灭菌水为对照. 结果表明,喷有"重桔1号"和"元石45"两株细菌的发酵液的叶片菌核病菌病斑比对照叶片病斑扩展明显减小,与对照相比其病斑面积平均少扩大值分别为9.75cm2和10.62cm2 , 两株细菌的发酵液对油菜菌核病的绝对防治效果分别为19.5%和47.5%.  相似文献   
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研究乳酸菌发酵冬瓜汁饮料对食品中常见微生物,包括黑曲霉、青霉、酵母菌和金黄色葡萄球菌等的抑制作用。结果表明,乳酸菌发酵冬瓜汁饮料在高浓度时对几种微生物的抑菌作用明显,抑菌效果随作用时间增加,含有的抑菌物质具有较好的热稳定性。乳酸菌发酵冬瓜汁饮料是一种值得开发的新型抗菌保健饮料。  相似文献   
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以钛酸丁酯和无水乙醇为原料,加硝酸银引入银离子,采用溶胶凝胶法和浸渍提拉法在玻璃表面施涂膜层,控制提拉速度6cm/min,经500℃热处理,制得均匀透明的多孔纳米TiO2玻璃.通过对样品XRD、SEM等分析的研究,二氧化钛薄膜主要呈锐钛矿相,而且其纳米颗粒大小在50-100nm范围.以大肠杆菌为菌种,对样品进行抗菌测试结果表明:银的抗菌机理为银离子接触抗菌,添加少量银离子,薄膜即有良好的抗菌能力.透光率分析表明纳米TiO2玻璃的透光性较好,在可见光范围内相对于普通玻璃的透光率在65%以上.  相似文献   
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黄柏煎剂的抗炎、抗菌作用研究   总被引:1,自引:0,他引:1  
摘要: 目的 观察黄柏煎剂的抗炎、抗菌作用。方法 昆明种小鼠 50 只按体质量随机分为 5 组,小鼠连续灌胃黄 柏煎剂 7 天后小鼠左耳廓内外侧涂 20 μL 二甲苯致炎,右耳不涂作为对照,计算各组耳肿胀度及抑制率; SPF 级 SD 大鼠 40 只在左、右前肢分别埋入无菌塑料环致肉芽肿,然后按体质量随机分为 5 组并按照相应剂量连续灌胃黄柏 煎剂 7 d,计算各组肉芽肿质量; 昆明种小鼠 60 只,根据性别和体质量随机分为 6 组,分别按照相应剂量连续灌胃 黄柏煎剂 7 d。第 7 天给药 1 h 后各组小鼠腹腔注射金黄色葡萄球菌菌液,6 h 再给药 1 次。观察小鼠在 72 h 内的 死亡率。结果 与对照组比较,黄柏煎剂各剂量组均能不同程度的抑制小鼠耳廓肿胀度,差异具有统计学意义( P < 0. 05 或 P < 0. 01) ,其中以低剂量组的作用最好; 与对照组比较,黄柏煎剂低剂量组能显著降低大鼠肉芽肿质量 ( P < 0. 05) ; 高、中剂量组有一定的降低趋势,与对照组比较,差异无统计学意义( P > 0. 05) ; 黄柏高、中、低剂量组 的死亡率分别是 50% 、40% 、20% 。与对照组比较,中、低剂量组可降低感染小鼠的死亡率( P < 0. 05 或 P < 0. 01) 。 结论 黄柏煎剂具有良好的抗炎、抗菌作用。  相似文献   
5.
Antibacterial Effects of Silver Loaded Hydroxyapatite   总被引:6,自引:0,他引:6  
IntroductionIthaslongbeenknownthatsilveranditscompoundhavestronginhibitoryandbiocidaleffectsonbacteria[1] .SpadarofoundthatsilverionhadabiocidaleffectonasmanyassixteenkindsofbacteriaincludingEscherichiacoliandStaphylococcusaureus.Thismeansthatithasabroa…  相似文献   
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The novel chitosan microspheres grafted with β cyclodextrins (CMGC) were prepared by means of the reaction of chitosan microspheres and mono-(6-p-tosyl)- β-cyclodextrins (β-CD-OTs-6). β-CD-OTs-6 were gained by the reaction of p toluenesulfonyl chloride (TsCl) and β-cyclodextrins (β-CDs). Their structures were proved by Fourier transform infrared spectral analysis (FT-IR), X ray powder diffraction analysis, and ^13C NMR; the configuration of CMGC was characterized by scanning electron micrograph (SEM) and transmittance electron micrograph (TEM). The inclusion complex of CMGC with iodine was prepared and its inclusion ability was studied. The experimental results showed that some iodine was included with CMGC and formed a stable inelusion. The stable complex of CMGC and iodine (CMGC-I) shows good antibacterial effect.  相似文献   
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The novel chitosan microspheres grafted with β-cyclodextrins (CMGC) were prepared by means of the reaction of chitosan microspheres and mono-(6-p-tosyl)-β-cyclodextrins (β-CD-OTs-6). β-CD-OTs-6 were gained by the reaction ofp-toluenesulfonyl chloride (TsCl) and β-cyclodextrins (β-CDs). Their structures were proved by Fourier transform infrared spectral analysis (FT-IR), X ray powder diffraction analysis, and13C NMR; the configuration of CMGC was characterized by scanning electron micrograph (SEM) and transmittance electron micrograph (TEM). The inclusion complex of CMGC with iodine was prepared and its inclusion ability was studied. The experimental results showed that some iodine was included with CMGC and formed a stable inclusion. The stable complex of CMGC and iodine (CMGC-I) shows good antibacterial effect. Foundation item: Supported by the State Educational Committee Doctoral Foundation of China(2000048615) Biography: YI Ying (1964-), female, Associate professor, Ph. D candidate, research direction: synthesis of friendly environmental material.  相似文献   
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