某小区二次供水水箱污染事件调查

目的:调查上海市杨浦区某小区居民生活饮用水的污染原因。方法 :2014年11月中旬,上海市杨浦区某小区居民生活饮用水受到污染,出现类似油漆的异味。监督人员经过现场勘查发现,二次供水水箱所在地下泵房里的消防管道刚进行过油漆作业,泵房中油漆味浓烈。在现场采集了二次供水水箱进口水、水箱内储存水、水箱近端和远端两户居民家二次供水及一楼物业办公室直接来自水厂的直供水,共计5份水样带回区疾病控制中心实验室进行检测。检测项目为p H、肉眼可见物、浑浊度、色度、总氯、臭和味、苯、甲苯、二甲苯、挥发酚类等10项指标,检出结果按照《生活饮用水卫生标准》(GB 5749-2006)进行评价。结果该小区二次供水水箱内储存水、近端和远端两户居民家二次供水有油漆异味,并且此三个水样中有微量苯、甲苯和二甲苯检出,但均未超过《生活饮用水卫生标准》(GB 5749-2006)规定的限值。结论:这是一起由于地下生活泵房里的消防管道进行油漆作业而引起的小区二次供水污染事件。     

如何通过优化二次供水储水设施水龄来改善供水水质

<正>城市二次供水是现代化城市最重要的基础设施之一,为高层用户提供充足的水量和水压。与水龄相关的水质问题在二次供水储水设施中,逐渐显现,需亟待解决。本文阐述了二次供水储水设施高水龄对水质安全的危害,并对高水龄产生的主要原因进行了分析,并提出了通过改变设计来合理设置水池容积、有效调整水箱运维管理方式来控制水池运行,以期实现水箱水龄的优化改善,提高出水水质的解决办法,为解决二次供水中的水质安全问题提供参考借鉴。     

高层建筑二次供水现状及解决办法

随着城市人口的增加,土地资源的日益短缺,建设单位为了达到更大的容积率,楼房渐渐地由以多层建筑为主过渡到以高层建筑为主。高层建筑住户集中用水量大,对自来水的水压、水量要求较高,二次供水设施成为高层居民正常用水的保障。本文从高层建筑二次供水现状和二次供水解决办法两方面来论述。     

二次供水设施防污染措施研究

当城市供水管网造成的二次污染使水质不合格,并且难以改变管网造成的二次污染时,可以采取居住区集中再处理措施。本文分析了住宅小区生活饮用水二次供水设施防污染措施问题。     

二次供水设施改造技术问题探讨

二次供水设施的改造主要有管道的改造、屋顶水箱的改造、增设消毒设施、增设加压泵等。在不全面提高管网的供水压力的情况下,逐步取消无调节作用的屋顶水箱。如果水箱仍具有调节作用,可通过改造老式水箱,加强水箱管理和改为水池泵房供水方式,达到防止水质二次污染的目的。     

二次供水设施改造技术问题探讨

二次供水设施的改造主要有管道的改造、屋顶水箱的改造、增设消毒设施、增设加压泵等。在不全面提高管网的供水压力的情况下，逐步取消无调节作用的屋顶水箱。如果水箱仍具有调节作用，可通过改造老式水箱，加强水箱管理和改为水池泵房供水方式，达到防止水质二次污染的目的。     

鸡用真空箱式饮水器

<正> 目前,一般鸡场的供水方式主要有三种,一种是用饮水盆,二是塔形真空饮水器,三是常流水式水槽。 使用饮水盆是一种落后的供水方式。塔形真空饮水器供水,主要应用于雏鸡阶段,这种饮水器饮水比较卫生,但由于每个饮水器都需要经常换水,饲养员的劳动量比较大,加上经     

太谷县畜牧中心的"五化"措施

一、创建规模养殖小区,推广了园区化养殖.早在1993年,山西省太谷县畜牧中心创建了"四统二分"的园区化养殖发展模式.,即统一规划场地,统一圈舍设计,统一供水电,统一防疫管理,分户建设,分户经营,使全县的畜牧业出现了一次大飞跃,截至1998年底,全县在100个村建起230个规模养殖小区,小区内养鸡占到全县总数的65%,养猪占到25%.1998年畜牧业收入是1992年的10.9倍.     

基于用水规律的住宅二次供水系统优化及节能分析

经济的发展,带来城市建筑业的崛起。城市高层建筑住宅小区多采用二次供水系统,但是在二次供水系统中存在着一定的水质污染问题。本文将针对二次供水系统污染问题存在的、原因及优化措施进行简单的介绍。同时对二次供水系统进行节能分析,建立优化模型,最后确定优化改造方案,把二次供水系统改造成环保、经济、节约的供水方式。服务于城市建筑小区。     

基于畜牧养殖小区的定点畜牧养殖设想

为了规范畜牧养殖小区的发展,本文介绍了目前我国畜牧养殖小区存在的问题:养殖小区规划选址不合理,养殖小区对当地环境造成污染,养殖小区管理不规范,养殖小区设施不健全,养殖小区家禽品种比较复杂;简述了定点畜牧业在养殖小区实施的意义;提出了规范畜牧养殖小区的措施:科学选址、统一布局,规范各项制度、做好监督管理工作,加大资金投入力度、做好基础设施建设工作,引进新品种、全面提高养殖场经济效益。     

商会自治的基石——商会自治规范研究

在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

猪毛色遗传的研究进展

本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

乳酸杆菌作为益生菌广泛用于人和动物。本文综述了乳酸杆菌改善宿主健康的机制。乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道。文章重点讨论了乳酸杆菌表面成分（表面蛋白、脂磷壁酸和肽聚糖）与肠道受体（Ｃ型凝集素受体、Ｔｏｌｌ样受体和 Ｎｏｄ样受体）,阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制。     

Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF

Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo.     

Mechanism of Action of Probiotic Function of Lactobacilli

乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制.     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …