深圳市蔬菜农药残留分析

[目的]分析2007年深圳市超市、农贸市场中蔬菜有机磷、有机氯、拟除虫菊酯类农药残留情况,对比2006年的监测情况,找出农药使用的变化规律,为政府部门有针对性的监管蔬菜质量提供科学数据。[方法]2007年1到12月每个月共选取深圳市6个区中的30家超市、28家农贸市场,在每个超市、农贸市场中抽取蔬菜样品10个。采用农药快速检测方法结合气相色谱和气质联用法测定其中的24种农药残留。[结果]2007年共检测各种蔬菜样品6551份,蔬菜农药检出率与超标率为5.31%和2.99%,分别比2006年下降1.93%和1.24%。[结论]2007年的蔬菜农药残留比2006年有明显下降;引起蔬菜农药超标的主要原因是有机磷农药残留;高毒农药的使用有所下降,菊酯类农药引起的超标情况有所上升,应有针对性的加强监督管理。     

海淀分局首次开展蔬菜农药残毒检查

１月３０日凌晨，北京市工商局海淀分局在辖区内有国家资质的蔬菜农药残留检测机构成员的支持下，采取抽检与企业自检相结合、速检与仪器分析相结合的方式，对辖区内主要蔬菜集散地大钟寺市场及部分蔬菜销量较大的超市、企业节前蔬菜农药残毒超标进行了检查。结果表明，被检企业、市场、超市的蔬菜样品农药残毒有机磷和氨基甲酸酯类基本未超标。据国家有关权威部门２００１年度在全国２３个大中城市的检测结果显示，蔬菜农药残留超标率达到４７．５％。一些蔬菜产地不顾安全间隔期对于农药使用的管理规定，过量、超标准喷施农药，甚至一些专…     

蔬菜中农药的使用对食品安全问题的影响

随着人们健康饮食意识的提高,蔬菜作为餐桌上的宠儿,因为其含有多种人身体所需的维生素及纤维素成分,越来越受到广大消费者的喜爱,蔬菜消费在中国居民的食品消费中占据极其重要的地位,但同时也存在一定的问题,那就是大家现在普遍关注的蔬菜携带农药的问题。农药就像一把双刃剑:一方面,可以帮助蔬菜作物除虫除害健康成长;另一方面,如果使用不当,会严重影响蔬菜的质量安全,并且蔬菜上这些残留的农药对人体也存在着潜在的危害。因此,蔬菜中农药残留问题引起了人们的高度重视。本文通过对蔬菜中农药残留状况的研究,对蔬菜中农药残留风险进行评估,以期为消费者、食品安全监管部门和蔬菜种植户们提供科学依据,促进我国蔬菜产业健康安全发展。     

葡萄酒中农药残留的分析

探讨采用气相色谱-质谱法分析葡萄酒中33种农药残留。按照我国国标GB 2763-2012《食品安全国家标准食品中农药的最大残留限量》的方法,选取本公司2016年5月4日-5月6日的3个批次的葡萄酒进行农药残留的测定,采用丙酮/二氯甲烷超声提取,气相色谱-质谱法检测器对3批样品进行33种农药残留的检测。分析的3个批次的葡萄酒均没有检测到33种农药残留。采用气相色谱-质谱法检测葡萄酒中的33种农药残留,3个批次的葡萄酒均符合国家标准,未检出农药残留。     

我国食品安全中农药残留检测与应对措施

目前,我国食品质检屡屡不过关,已经成为我国需要迫切解决的重要民生问题之一。根据相关数据与资料显示,食品中农药残留量超标是食品质检不过关的首要因素。农药残留严重威胁着民众的健康安全,民众一旦食用农药残留量超标的果蔬,造成的后果是不堪设想的。因此,我国建立起一个完善的农药残留检测系统是非常重要的。本篇论文主要通过农药残留监测技术阐述食品安全的重要性,分别通过论述我国食品安全检测体系、具体食品安全检测应对措施以及对我国食品安全检测的前景期望三个方面,具体论述食品安全对于我国民众健康的重要性。     

大数据视角下食品安全抽检数据分析

目的:研究2019年某区食品安全监督抽检产品的工作情况,分析其中存在的主要问题。方法:对1 278批次产品进行微生物、重金属元素、农残、兽残与常规等项目的检测,并对检验结果进行数据评价。结果:1 278批次样品中,不合格批次27批次,总体不合格率为2.1%,重金属镉(Cd)、呋喃西林代谢物(SEM)与恩诺沙星等项目超标。结论:重金属残留与兽药残留问题一直比较突出,同时使用食品添加剂的问题也依旧存在,应当引起重视。     

蔬菜水果中农药残留量检测技术

近三年,我国加强了针对农产品的抽检力度,2016年农兽药残留不合格占总不合格数的6.5%,2017年第一季度农兽药残留不合格占总不合格数的15%,2018年第一季度食品中农兽药残留不合格问题占不合格总数的21.6%,比2017年同期高6.6个百分点,所以对当前蔬菜水果质量检测中,对农药残留量进行检测也是重要的构成内容之一。相关检测人员需要认真履行责任,认真分析在水果和蔬菜上残留的农药量以及农药的种类,避免存在问题的蔬菜水果流入市场当中。本文主要对当前常用的蔬菜水果中农药残留量检测技术以及质量控制方法分析等进行介绍,旨在为实际开展检测总结奠定基础。     

食品检测中农药残留检测技术探讨

在农业发展的过程中,人们对食品安全有了更加全面的认识。在人们日常所食用的食物中,尤其是瓜果蔬菜中含有的农药残留,严重危害人们的身体健康。为有效保障食品安全,加强食品中农药残留的检测就显得十分重要。基于此,本文阐述了加强农药残留检测的重要性,并对农药残留检测技术进行系统的分析和研究,从而为农药残留检测工作提供有效的依据和支撑。     

食品中有机磷农药残留检测的前处理方法

有机磷农药作为全球范围内使用量最大的农药之一,其毒性相对较大,给食品安全带来安全隐患。随着人们开始关注食品安全问题,若食品农药残留超标,人们则会排斥此类食品,并引起恐慌。因此,相关人员务必采取有效方法检测食品中的农药残留。本文对食品中有机磷农药残留检测的前处理方法展开分析讨论,希望为相关人员提供借鉴。     

食品药品监管总局公布2015年第9期食品安全监督抽检情况

<正>国家食品药品监督管理总局本期公布信息为婴幼儿辅助食品,涉及45家生产企业,其中抽检项目合格的样品68批次,不合格样品4批次;符合食品安全国家标准,但不符合包装标签明示值样品6批次,具体样品信息附后。监督抽检的4批次不合格样品情况主要包括:一、微生物超标的2批次样品是标称江西省安培实业有限公司生产的铁锌钙营养米粉和安智护畅     

纳米技术在聚烯烃中的研究进展

综述了聚烯烃纳米复合材料的优点、使用价值和近年来国内外聚烯烃纳米复合材料的研究进展，并介绍了无机粒子／聚烯烃复合材料和粘土／聚烯烃复合材料，重点阐述了粘土与聚乙烯、聚丙烯纳米复合材料的制备方法及粘土／聚烯烃纳米复合材料插层热力学分析，对目前聚烯烃纳米复合材料存在问题及发展前景进行了探讨。     

Healthy Investments in Investing in Health

This article discusses socially responsible investing (SRI) and tobacco. SRI allows investors, both institutional and individual, to express their concerns and make their social and ethical stands known to the companies they invest in and patronize. The tobacco industry is active in every country on the globe and generates huge profits, while tobacco use is responsible for 4 million deaths every year.The authors explore past and current views on investment in tobacco, partly based on a survey conducted by the Tobacco Free Initiative of the World Health Organization (WHO). There is clearly a trend toward divestment from tobacco for both ethical and financial reasons. Tobacco-free investments can be both ethically sound and financially profitable.     

Developments in Consumer Protection in India

This paper surveys the major developments in the field of consumer protection in India since 1984, when the statutory provisions for regulating unfair trade practices were incorporated for the first time.Among the developments described in the paper is the strengthening of provisions for consumer protection through amendments to the Act regulating restrictive and monopolistic trade practices (the MTRP Act). Public-sector undertakings and co-operative societies have been brought within the purview of the Act, and consumers have obtained the right to participate in inquiry proceedings before the MRTP Commission.Consumers and their associations have been given the right to seek redress of grievances arising out of the violation of certain pieces of legislation, including the Drugs and Cosmetics Act. The Consumer Protection Act, 1986, was enacted in order to provide speedy and inexpensive redress of consumers' grievances. Redress can now be sought before any consumer court also for negligence or deficiency in medical services.The Bureau of Indian Standards Act, 1986, has strengthened the measures for the standardisation and quality control of manufactured goods.A Consumer Welfare Fund has been set up to provide financial assistance to voluntary consumer organisations and for the general development of consumer movement in the country. A spurt in voluntary consumer organisations in different parts of the country can also be observed.Other developments include the establishment of a separate Department of Consumer Affairs in the Union Government and the setting up of a Consumer Product Testing Laboratory.     

关于我国资产证券化若干问题的探讨

资产证券化是一项复杂的金融工具创新,引进和实施这种新型的融资工具需要大量的配套工作。我国实施资产证券化需要解决特设机构的设立、基础资产的选择、破产隔离、信用增级、会计处理、税收政策以及立法和监管等方面的问题。     

Economic Keywords in 2007 in China

RMB exchange rate The exchange rate of Renminbi,the Chinese currency, witnessed an appreciation of around six percent to one U.S. dollar this year. On December 13, the central parity rate stood at RMB 7.3568 against one dollar,according to the Chinese Foreign Exchange Trading System, breaking the 7.36 mark.     

Conflict in Supplier–Retailer Relationships in the Brewery Industry in Cameroon

The authors develop a theoretical framework to explain conflict in supplier–retailer relationships. In addition to traditional influence strategy variables, the framework links conflict to retailer dependence and supplier formalization. The framework is empirically tested in the Cameroonian brewery industry. The findings support the view that channel conflict is inversely related to retailer dependence and supplier formalization. Contrary to expectations, the use of noncoercive influence strategies (information exchange and recommendations) has no significant effect on conflict, while, as expected, the use of coercive influence strategies (threats and promises) increases conflict.     

粤北山区砖园仓储粮机械通风应用研究

在砖园仓机械通风应用试验中,正确运用理论计算,精确得出通风技术数据,依此设计通风系统,结果表明：在实仓运行中,检测的主要技术参数和设计值基本相符,经136h通风,粮温从38℃降至13℃,吨粮降温耗电0.011℃,降温好、电耗低,证明设计方法正确,符合南方稻谷产区,解决了基层普遍存在的砖园仓机械通风盲目设计问题,为规范设计作出了示范,验证了粮层压力正确计算方法。     

Recent advances in reinforcement learning in finance

The rapid changes in the finance industry due to the increasing amount of data have revolutionized the techniques on data processing and data analysis and brought new theoretical and computational challenges. In contrast to classical stochastic control theory and other analytical approaches for solving financial decision-making problems that heavily reply on model assumptions, new developments from reinforcement learning (RL) are able to make full use of the large amount of financial data with fewer model assumptions and to improve decisions in complex financial environments. This survey paper aims to review the recent developments and use of RL approaches in finance. We give an introduction to Markov decision processes, which is the setting for many of the commonly used RL approaches. Various algorithms are then introduced with a focus on value- and policy-based methods that do not require any model assumptions. Connections are made with neural networks to extend the framework to encompass deep RL algorithms. We then discuss in detail the application of these RL algorithms in a variety of decision-making problems in finance, including optimal execution, portfolio optimization, option pricing and hedging, market making, smart order routing, and robo-advising. Our survey concludes by pointing out a few possible future directions for research.