呕吐毒素毒性研究进展

呕吐毒素(DON)作为真菌次级代谢产物广泛存在于饲料和谷物中,对人和动物的健康产生危害,文章就呕吐毒素的毒性研究进展进行综述。     

荧光定量检测试纸检测饲料中黄曲霉毒素B_1

研究建立了饲料中黄曲霉毒素B_1荧光定量检测方法。饲料样品经70%甲醇溶液提取,过滤后,用0.01 mol·L~(-1) pH 7.4 PBS复溶,结果表明,黄曲霉毒素B_1在5～80μg·mL~(-1)浓度范围内线性关系良好,r~2=0.998。以配合饲料、浓缩饲料、预混料为添加基质,其回收率在80%～120%,检出限为5μg·mL~(-1)。结果显示,本方法灵敏度高,操作简单,结果准确,可满足饲料中黄曲霉毒素B1的分析检测。     

小麦赤霉病DON毒素的产生及防治解析

我国小麦赤霉病的发生防控是粮食优质高产的重要组成部分,但由于赤霉病会产生脱氧腐镰刀菌烯醇(DON)毒素,影响产量,因此需要加强DON毒素的预防和防治。本文主要对DON毒素与赤霉病的关系、认识误区、防治方式进行了综述,并分析了小麦赤霉病新的化学防治的应用前景及应用趋势。     

一起樱桃谷肉鸭黄曲霉毒素中毒的诊治

黄曲霉毒素(Aflatoxin,简写AF)主要是黄曲霉菌和寄生曲霉菌的代谢产物。本文介绍了从临床变化、病理变化及实验室检查等手段对肉鸭黄曲霉毒素中毒病例进行确诊及治疗过程。     

酶联免疫吸附法检测饲料中黄曲霉毒素B_1

黄曲霉毒素是黄曲霉和寄生曲霉的次级代谢物,具有强烈的致癌、致畸和致突变的作用,危害性很强。为了解绵阳市仔(乳)猪饲料中黄曲霉毒素B1污染情况,制定防治和保护措施提供依据,利用酶联免疫吸附ELISA原理对20个品牌(品种)仔猪饲料进行检测,结果显示总体情况良好,但仍有隐患。     

2013年四川省饲料原料中霉菌毒素污染情况调查

为了解2013年四川省饲料原料受霉菌毒素的污染情况,采集四川省饲料原料120个,采用酶联试剂盒和液质联用仪两种方法,测定其中黄曲霉毒素B1、玉米赤霉烯酮、呕吐毒素、赭曲霉毒素A和T-2毒素的含量。结果表明,四川省饲料原料中霉菌毒素超标率均低于全国平均水平,玉米赤霉烯酮和呕吐毒素污染程度相对较重,黄曲霉毒素B1、赭曲霉毒素A和T-2毒素超标率为0。     

我国黄曲霉毒素高灵敏检验跃居国际领先

目前，中国农业科学院优良作物研究所李培武研究员带领农业部生物毒素检测重点实验室科研团 队进行的黄曲霉毒素高灵敏检测技术研究获得重要突破，成果经专家鉴定达到国际领先水平。黄曲霉毒素是迄今发现的毒性和致癌性最强的真菌毒素，其中，黄曲霉毒素B1的毒性是氰化钾10倍，是砒霜的68倍，致癌力是标准致癌物二甲基硝胺的75倍。我国是黄曲霉毒素污染较为严重地区，由于缺少现场高灵敏准确定量检测技术产品，误食黄曲霉毒素污染超标的农产品或食品已成为一些地区高肝癌发生率的主要原因之一， 对百姓健康和生命安全构成威胁，并严重影响农产品和食品出口贸易。     

饲料受黄曲霉毒素污染的危害与防控

<正>饲料受霉菌污染较普遍,霉菌污染后饲料产生异味、结块、色泽异常、质地发生变化。营养价值和适口性下降,蛋白质溶解度降低,部分维生素遭破坏。霉菌产生的毒素可引发畜禽中毒。霉菌产生的毒素种类甚多,本文主要选择危害较普遍的黄曲霉毒素予以介绍。1黄曲霉毒素的危害黄曲霉毒素及其衍生物多达20余种,其中黄曲霉毒素B1(AFB1)数量最多。不同品种、年龄、性别和营养状况的畜禽对黄曲霉毒素的敏感性表现不同,其中低龄、营养不     

液氯消毒工艺去除微囊藻毒素的试验研究

通过小试研究了氯消毒工艺对黄浦江水中两种微囊藻毒素的去除效果及对水厂实际运行的意义.结果表明,游离氯对试验中所研究的两种微囊藻毒素(MC-LR、MC-RR)具有一定的去除效果,两种微囊藻毒素的氯化降解过程均符合二级反应动力学模型,通过提高游离氯的浓度和持续时间,可以显著提高微囊藻毒素的降解速率;在pH值为7.25时,将黄浦江水中10 μg/L的MC-LR降至国家水质标准中的要求值(1μg/L)所需要的cT值为107.99 mg·min/L,正常消毒条件下难以达到此值;但氯消毒工艺能够明显降低微囊藻毒素的急性毒性,可以作为目前控制水中微囊藻毒素脱毒的一种手段.     

家禽黄曲霉毒素中毒的诊疗及防治措施

为了探讨家禽黄曲霉毒素中毒的诊疗及防治措施,本文对黄曲霉毒素中毒的病因、临床症状、病理变化、诊断要点、防治措施一一进行了阐述。目的是提高对家禽黄曲霉素毒中毒病的认识,并做好预防和治疗工作。     

浅析高速公路工程招投标中的最低评标价法

结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。     

Place-Making in Megaprojects in Melbourne

This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer.     

Pathogens in septage in Vietnam

Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l^− 1, and were detected in all septage sludge samples with an average of 16,000 ova l^− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage.     

在市场中实践在实践中学习在学习中进步--工程公司市场化进程的回顾与展望

近两年来，工程公司在提高市场竞争意识、推动市场化进程中做了大量工作，其中坚持走出去的方针是我们自我加压、推行加快市场化步伐的一个重要战略步骤。     

新时期广东城市化的新特点

新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。     

新形势下高校强化基建财务管理的探讨

在市场条件下高校基建财务人员在加强日常财务管理的同时,必须树立起高度的工作责任心,抓好事前监督、事中监督、事后监督三个环节,全面理解、贯彻执行《高等学校财务制度》,管好用好各项基本建设资金,提高基建财务管理水平,更好地完成高校各项基建任务,以有限的投资,最快的建设速度,获得最大的投资效益。     

2005年北京办公物业市场七大趋势

趋势一:CBD区域写字楼集中放量从各区域规划方案上看,CBD区域多数项目在03～04年处于项目的报批手续及拆阶段,预计2005年正式推向市场,因此2005年CBD区域将成为北京市场供应集中的域,区域即将供应的项目有北京财富中心(二期)、金地国际花园、万达广场、SOHO尚都、万通中心、世纪财富中心、怡禾国际中心、光华国际等。除去未知项目,2005CBD写字楼办公面积的供应量为60万平方米左右。中关村区域经过一段时间的集中供后开始逐步放缓,2005年供应的体量相对较大的项目有中关村金融中心、新中关。金街区域可能开盘的项目只有2个:英蓝国际中…     

浅谈我国工程项目建设成本控制存在的问题

结合目前我国施工企业工程项目成本管理现状,对工程项目成本管理过程中存在的问题进行了较详细的分析,并提出了一些解决问题的办法,以做好项目成本控制工作,进而增强企业经济实力。     

Variation in property taxation in Tulsa

Conclusions It may be reasonably concluded from this study that the range of variation in these ratios of assessed to actual value are of a reasonable size for the great majority of cases. The frequency distribution of these sample ratios was not normal, however, as was assumed a process of this type would produce. On the other hand, the failure of the regression analysis to identify any significant variables which would explain these variations would tend to re-enforce the assumption that the fluctuations were indeed of a random nature.To sum it up in one paragraph, aside from a few extreme cases, the assessing process appears to give estimates which are more consistent than would be expected under the assumption that any errors would be of a random nature, but the regression analysis was unable to isolate any particular socioeconomic characteristics which would explain the variation which was present.Financial support for this research project was furnished by the University of Tulsa.