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<正>经过一季蚕的连续饲养,上蔟采茧后,蚕室中病原物及上蔟病死蚕体的病原数量最多、病原的毒力最强,所以要及时杀菌消毒。此时消毒可杀灭大量集中于蚕室、蚕具及周围环境中的病原物。消毒要按照先里后外,先局部后整体,具体消毒方法如下。1消毒蚕室内蚕茧采摘后,随即用1%有效氯漂白粉或者消杀精对蚕室蚕具进行全面消毒。方格蔟用福尔马林熏蒸或者喷洒消毒。消毒后密闭门窗30min以上,然后再将蚕具搬出放入活水中浸泡,并对蚕 相似文献
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在生产中,广大蚕农对养蚕前的消毒工作一般较为重视,而对蚕后的“回山消毒”工作往往比较马虎,不能有效地降毒防病,易造成大环境污染。事实上,“回山消毒”是下期蚕前消毒的基础,要使下个蚕期有一个良好的、相对稳定的饲养环境,必须做到准备超前、工作到位、不能仓促。经过一季蚕的连续饲养,上蔟采茧后,蚕室中病原物及蔟中病死蚕体的病原数量最多、病原的毒力最强,此时消毒可及时杀灭大量集中于蚕室、蚕具、及周围环境的病原物。“回山消毒”的技术要点如下:1先毛消后打扫蚕茧采摘后,随即用1%有效氯漂白粉或消杀精对蚕室蚕具进行全面消毒。… 相似文献
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《畜牧兽医科技信息》2016,(11)
正本类消毒剂包括单链季胺盐和双长链季胺盐两类,前者只能杀灭某些细菌繁殖体和亲脂病毒,属低效消毒剂;后者可杀灭多种微生物,包括细菌繁殖体,某些真菌和病毒。季胺盐类可与乙醇或异丙醇配成复方制剂,其杀菌效果明显增加。季胺盐类消毒剂的特点是对皮肤粘膜无刺激,毒性小,稳定性好,对消毒物品无损害等。1消毒药的有效成分十二烷基二甲基苄基氯化铵(1227)苯扎氯铵(洁尔灭),C22H40Cl N)分子量340 相似文献
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几种消毒剂杀菌特性的比较试验 总被引：2，自引：0，他引：2
选用目前常用的含氯、季胺盐消毒剂,针对大肠杆菌、金黄色葡萄球菌、枯草芽胞杆菌进行了最小抑菌浓度、最小杀菌浓度的测定及定量杀菌试验。结果表明含氯消毒剂(强力消毒灵)对3种细菌的杀菌效果最好;双链季胺盐消毒液(康唯消)对3种细菌的抑菌效果最好;双季胺碘消毒液(百毒杀)对3种细菌的抑菌、杀菌效果较差。 相似文献
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桑蚕病原分散单体对有效氯的稳定性 总被引：1，自引：0，他引：1
在鉴定某一消毒药剂的消毒效果时,通常采用的方法是将病原附着在特定的载体上,然后进行消毒试验,它的优点是模拟了病原在生产现场所具有的某些客观环境条件,比较符合生产实际。在这样的条件下,试验所得的数据(如消毒药剂浓度、消毒时间和消毒温度等),由于对蚕业生产具有很大的针对性,因而为蚕业生产领导部门制订消毒标准提供了重要的依据,对贯彻彻底消毒起着十分重要的作用。 相似文献
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<正> 6、“蚕季安”消毒剂“蚕季安”是一种新型的蚕室蚕具消毒剂。消毒效果好,腐蚀性低,其消毒性能可以代替漂白粉。这种消毒剂为黄白色腊状固体或胶状体,易溶于小,水溶液呈弱碱性,气味芳香,味极苦,振摇时能产生大量泡沫。属季铵盐阳离子表面活性剂, 相似文献
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环境激素阿特拉津对家蚕血细胞的影响 总被引：1，自引：0，他引：1
为了探讨环境激素阿特拉津(Atrazine,AT)对家蚕生理的影响,用添加AT的人工饲料饲养家蚕,调查了5龄幼虫血细胞数和血细胞形态的变化,同时调查了血液细胞DNA的损伤情况。结果表明:AT连续添食后,家蚕5龄第4日-6日家蚕血球细胞特征性释放高峰时,0.05mmol/kg低浓度AT区的血球细胞数显著增加(p<0.01),0.10mmol/kg浓度AT区血球细胞数则显著减少(p<0.05),而0.20mmol/kg浓度AT区则没有明显影响;实验浓度的AT添食,家蚕5龄幼虫血球细胞的形态没有发现畸形变化,也未见血球细胞DNA的遗传损伤。结论:家蚕食下能够完成幼虫生长发育的环境激素AT(0.20mmol/kg以下浓度)后,血球细胞形态和细胞核DNA没有受到明显不良影响,但AT会影响家蚕血球细胞数目的变化,可能是家蚕积极应对体外化学物质影响的生理反应。 相似文献
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Bacterial adaptation to quaternary ammonium compounds (QACs) is mainly documented for benzalkonium chloride (BC) and few data are available for other QACs. The aim of this study was to assess the effects of repeated exposure to different quaternary ammonium compounds (QACs) on the susceptibility and/or resistance of bacteria to other QACs and antibiotics. Escherichia coli strains (n=10) were adapted by daily exposure to increasingly sub-inhibitory concentrations of a QAC for 7 days. Three QACs were studied. Following adaptation, we found similar levels of reduction in susceptibility to QACs with a mean 3-fold increase in the minimum inhibitory concentration (MIC) compared to initial MIC values, whatever the QAC used during adaptation. No significant differences in antibiotic susceptibility were observed between the tested QACs. Antibiotic susceptibility was reduced from 3.5- to 7.5-fold for phenicol compounds, β lactams, and quinolones. Increased MIC was associated with a shift in phenotype from susceptible to resistant for phenicol compounds (florfenicol and chloramphenicol) in 90% of E. coli strains. Regardless of the QAC used for adaptation, exposure to gradually increasing concentrations of this type of disinfectant results in reduced susceptibility to QACs and antibiotics as well as cross-resistance to phenicol compounds in E. coli strains. Extensive use of QACs at sub-inhibitory concentrations may lead to the emergence of antibiotic-resistant bacteria and may represent a public health risk. 相似文献
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蚕体黄酮类化合物的提取及不同家蚕品种间的含量差异 总被引：1，自引：1，他引：0
为了高效提取家蚕幼虫体内的黄酮类化合物及筛选富含黄酮类化合物的家蚕品种,通过正交试验优化提取工艺条件,采用NaNO2-Al(NO3)3-NaOH比色法测定分析16个黄血蚕品种和3个普通白血蚕品种幼虫体中的黄酮类化合物含量。家蚕幼虫粉经超声波预处理20 min后以80%乙醇溶解,当原料质量浓度为25 g/L,在60℃水浴中提取6 h的效果较佳,提取蚕体总黄酮的质量比达到0.473 mg/g。黄血蚕品种幼虫体中的黄酮类化合物含量极显著高于普通白血蚕品种,两类品种样品中的总黄酮平均质量比分别为0.560、0.513 mg/g。在16个黄血蚕品种中,以来源于东南亚地区的二化性品种幼虫体中的黄酮类化合物含量较高,是富含黄酮类化合物的家蚕品种资源。 相似文献
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“蚕宝康”对桑蚕细菌病防治的研究 总被引：3，自引：0，他引：3
研制的桑蚕细菌病防治新药“蚕宝康”其最低抑菌浓度和最低杀菌浓度比氟哌酸低４～８倍,在蚕体内药效持续时间长达１０小时,研究表明,该药对蚕安全无副作用,在低浓度下对蚕细菌病防治也具良好效果,感染时间对防治效果有明显的影响,添药次数与防治效果之间无直接联系,以添药３～４次为宜。 相似文献
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Suchisree Jha ;Palash Mandal ;Phalguni Bhattacharyya ;Amitava Ghosh 《畜牧与生物技术杂志(英文版)》2014,(3):348-356
The mulberry leaves have been considered as a sole food source for silkworm, Bombyx mori （L.）. In present work an attempt was made to investigate the role of low molecular weight peptide（s） isolated from mulberry leaves on silkworm rearing. Also we have tried to find out the role of free-radical scavenging activities of isolated peptide（s） on silkworm growth. Larval growth rate was found effective under the influence of peptide（s）. Consumption rate of larvae after peptide（s） treatment on mulberry leaves was significantly enhanced over control. High antioxidant activity was found in Low molecular weight peptide（s） which have an effect on silkworm. 相似文献
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Koji TSUJIMURA Harutaka MURASE Hiroshi BANNAI Manabu NEMOTO Takashi YAMANAKA Takashi KONDO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1545-1548
We investigated the influences of various reaction conditions on equine
herpesvirus type 1 (EHV-1) disinfection by 5 commercial disinfectants (3 quaternary
ammonium compounds [QACs] and 2 chlorine-based disinfectants) and 1 anionic surfactant.
QACs at their highest recommended concentrations had no virucidal effect on EHV-1 with a
10-min reaction time at 0°C or a 1-min reaction time at room temperature. Chlorine-based
disinfectants achieved EHV-1 disinfection with a 10-min reaction time at −10°C or a 30-sec
reaction time at room temperature. In the presence of 5% fetal bovine serum, QACs (except
for benzalkonium chloride) showed more stable virucidal effects than did chlorine-based
disinfectants. The virucidal effect of the anionic surfactant was almost equivalent to
that of the QACs. 相似文献
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The mulberry leaves have been considered as a sole food source for silkworm, Bombyx mori (L.). In present work an attempt was made to investigate the role of low molecular weight peptide(s) isolated from mulberry leaves on silkworm rearing. Also we have tried to find out the role of free-radical scavenging activities of isolated peptide(s) on silkworm growth. Larval growth rate was found effective under the influence of peptide(s). Consumption rate of larvae after peptide(s) treatment on mulberry leaves was significantly enhanced over control. High antioxidant activity was found in Low molecular weight peptide(s) which have an effect on silkworm. 相似文献
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鉴别家蚕品种真实性及检验蚕种杂交率是蚕桑生产的重要工作，但生产上还没有一种理想的方法。笔者建立了一种根据家蚕品种小蚕期个体形体特征鉴别家蚕品种的方法，主要是采用体视显微镜和摄影设备获得每一个家蚕品种小蚕期个体的照片，再借助于“家蚕品种识别专家系统软件V1．0”建立相应的形体特征图文数据库，然后将待鉴别家蚕品种的形体特征与数据库中已知品种的形体特征进行一对一的比较分析，达到鉴别品种的目的。本文介绍了该软件设计的架构和用户界面，数据库建立的方法、形体特征图文数据库的内容以及该数据库在家蚕品种鉴别中的应用。 相似文献