化工生产厂房防腐的几种处理方法

针对化工生产的烧碱、盐酸液、三氯乙醛试剂等20余种产品,摸索出几种基本防腐的施工方法,供化工企业土建专业人员参考。     

日光能土壤高温消毒防治茄子黄萎病研究

2006～2008年连续3a对太阳能高温闷棚提高土壤耕作层温度、防治茄子黄萎病的效果以及对茄子产量的影响进行了研究。结果表明：高温闷棚可极显著提高0～20cm耕层土壤温度，使各土层温度均达到微茵核的致死温度，极显著降低茄子黄萎病的发病率，提高茄子产量。     

砂糖橘果实采后咪鲜胺锰盐处理防腐保鲜研究

砂糖橘是广东肇庆著名特产水果,但采后病害重、不耐贮藏。基于前期试验及筛选结果,选用咪鲜胺锰盐为杀菌剂,制备成不同浓度的溶液进行浸果处理,对果实采后失重率、可溶性固形物含量和腐烂率等3个重要品质指标进行测试分析及对药剂施用安全性进行观察鉴评。结果表明:咪鲜胺锰盐对砂糖橘果实采后防腐保鲜作用显著,适宜施用浓度为0.15%~0.20%(按有效含量);室温下贮藏15、30、45、60、90 d的果实腐烂率分别为0、5%、10%、10%、30%,未腐烂果实的味道和气味未出现特异性变化。对砂糖橘果实采后咪鲜胺锰盐保鲜处理相关的其他技术环节进行探讨。     

袋装酱腌菜的防腐保藏技术研究

对袋装酱腌菜腐败变质的原因进行了分析和探讨,认为微生物的发酵活动是导致袋装酱腌菜腐败变质的主要原因,加热杀菌是抑制其活动的主要措施,但必须与其它措施综合使用才能达到最好的防腐效果。     

钢结构的防火与防腐问题的探讨

钢结构建筑满足保护土地,节约能源和经济持续健康发展的要求,钢结构要在实际应用中克服防火方面的不足,必须进行防火处理,钢材腐蚀不仅造成经济上的巨大损失还会影响生产的稳定,扰乱人们的生活秩序,严重的还会酿成安全事故。     

A prospective comparison between stabilized glutaraldehyde and chlorhexidine gluconate for preoperative skin antisepsis in dogs

OBJECTIVE: To compare the efficacy of 0.3% stabilized glutaraldehyde and alcohol (SG+A), 0.3% SG and water (SG+W), and 4% chlorhexidine gluconate tincture (CG+A), as skin disinfectants in dogs undergoing ovariohysterectomy. STUDY DESIGN: Prospective, blinded clinical study. ANIMALS: One hundred and twenty-one dogs. METHODS: Cutaneous bacterial colony forming units (CFU) from the perioperative site after skin preparation, after antisepsis, and after surgery (incisional and paramedian), were quantified. The influence of high initial bacterial counts (> or =150 CFU) and surgical time on antibacterial efficacy was examined and the proportion of dogs from which Staphylococcus intermedius was cultured, determined. Perioperative skin reactions and wound infections were documented. RESULTS: All 3 antiseptic solutions significantly and equally reduced CFU to all post-antisepsis sampling levels irrespective of surgical duration (mean surgical times 151.6, 136.2, and 149.6 minutes for CG+A, SG+A and SG+W, respectively). Median percentage reductions in CFU ranged between 99.3% and 100%. In dogs with initial high counts and disinfected with CG+A and SG+W, the incisional samples had significantly higher counts than the post-antisepsis samples. In the CG+A and SG+W groups, the proportion of post-surgery samples yielding S. intermedius was significantly higher at the incisional than the paramedian sites. Eight mild cutaneous reactions were recorded in equal proportions for the 3 solutions. There were no recorded infections. CONCLUSIONS: All 3 preparations had an equal ability to reduce and maintain low CFU counts, with minimal cutaneous reactions. CLINICAL RELEVANCE: SG solutions are safe and effective preoperative skin antiseptics for elective clean-contaminated surgical procedures.     

硫酸盐污染地质中混凝土的防腐工程实例分析

此文通过对侵蚀机理的分析,以及对防腐方法的研究,结合工程实际,提出一些防腐措施以及为实际施工提供合理化建议。     

松萝酸的防腐作用研究

以西藏色季拉山长松萝为材料,乙酸乙酯为溶剂回流提取制备松萝酸,并采用滤纸片法对提取物松萝酸进行了抑菌活性和最小抑制浓度测定,同时以苯甲酸为对照,研究了松萝酸的防腐作用。结果表明,松萝酸对细菌、霉菌和酵母菌的生长均有明显的抑制作用;将用松萝酸处理的鲜猪肉、豆腐和牛奶放入37℃的恒温培养箱中1周后,其菌数均不超过5×108／g(mL),而对照不低于15×10-8／g(mL)。细菌菌落数的明显减少表明,松萝酸具有一定的防腐效果;但与相同浓度的苯甲酸相比,松萝酸的抑菌防腐效果稍差。