质检总局注销48张双酚A奶瓶企业生产许可证

我国自2011年6月1日禁止生产PC等含双酚A的婴幼儿奶瓶以来，对生产企业的许可证注销工作随即启动。国家质检总局在官方网站上公布了首批被注销的48张双酚A奶瓶企业生产许可证。这48家是由总局发证的聚碳酸酯（PC）奶瓶生产企业，是自6月禁止双酚A奶瓶以来首批被注销的。     

废氯化汞触媒相关企业排放检测监管加严

<正>不久前,环保部发布《废氯化汞触媒危险废物经营许可证审查指南》,以规范废氯化汞触媒危险废物经营许可证的审批工作,推动提升废氯化汞触媒利用行业的整体水平,促进行业持续健康发展。中国目前年生产能力     

标准化对外贸十分重要

随着经济全球化进程的日益加快,我国对外开放逐渐扩大,为进一步扩大进出门贸易提供了难得的机遇。同时,随着关税、配额、许可证等贸易壁垒的逐步减弱和取消,一些国家凭借先进的科学技术和生产水平,利用技术法规、标准和合格评定程序设置技术性贸易壁垒的行为越来越突出。只     

9部门要求加强食品添加剂监管工作

不久前,卫生部、食品药品监管局、工商总局、质检总局等9部门联合发布《关于加强食品添加剂监督管理工作的通知》,《通知》明确指出,食品生产者和餐饮单位所使用的额外添加剂,必须取得生产许可证或者有效期限内的卫生许可证,食品销售者不得在销售过程中添加任何非食用物质和食品添加剂。2008年12月,9部门在全国开展打击违法添加非食用物质和滥用食品添加剂专项整治行动以来,监管工作所面临的形势依然严峻,主要有3大问题:(1)有的食品生产经营单位未按照相关法规和标准的规定采购、查验和使用食品添加剂;(2)食品添加剂生产经营不规范的问题依然存在,复合食品添加剂问题突出;(3)食品添加剂标签、说明书不规范,夸大宣传使用效果和擅自扩大使用范围,误导食品生产经营者使用。为此《通知》要求,下阶段工作将继续加强对食品添加剂生产经营和使用的监管,包括严格食品添加剂生产许可和监督管理工作,严把生产许可关;规范复合食品添加剂的生产,把复合食品添加剂纳入工业产品生产许可范围,严禁使用非食用物质生产复合食品添加剂;严格规范食品添加剂经营主体准入行为,加强对经营活动的监督管理,督促销售者建立进货查验制度等自律机制;规范食品添加剂标签、说明书,包装上必...     

东莞市德欣电子科技有限公司

东莞市德欣电子科技有限公司是一家专业从事研发、生产和销售气体质量流量计、质量流量控制器及流量显示积算仪的二级计量[粤量工O字（2009）os8~]企业,具有自主知识产权的专利（ZL200620015915．0ZL200820092383．XZL200920217737．3）产品一DSN系列已获得了国家制造计量器具许可证（粤制00000754号）,并广泛应用于半导体、真空、太阳能、分析仪器、光电、制气、医疗、电力等各个领域。     

食品质量安全监管体系在我国初具规模

据了解，我国有400多家企业已获得HACCP认证，9000多家食品企业获得出口卫生注册证书，近万家食品企业通过了ISO9000质量体系认证或产品质量认证。目前有关食品质量安全的法律法规有《产品质量法》、《进出口商品检验法》、《食品卫生法》、《工业产品生产许可证条例》等。存标准化方面．已制定了1050项食品国家标准、近万项食品地     

生态环境等部将在年底前公布有害大气污染物名录

正全国人大常委会执法检查组关于检查大气污染防治法实施情况的报告不久前提交全国人大常委会会议审议,报告提出,生态环境等部门要在2018年年底前依法制定并公布有毒有害大气污染物名录。报告建议加快制定配套法规规章和标准。在2019年年底前出台排污许可管理条例,对固定污染源实施全过程管理和多污染物协同控制,按行业、地区、时限核发排污许可证。2020年,将排污许可证制度建设成为固定源环境管理     

标准物质及其管理

我国国务院计量行政部门根据国际标准化指南有关规则，将标准物质列入《中华人民共和国依法管理的计量器具目录》进行统一编号，分级分类，制定标准物质管理方法，国家统一规范，对生产者制造标；隹物质申请制造计量器具许可证及国家级标准物质计量器具制造许可证到期重新复查，国家统一归口管理。     

首台微型肾病快速生化分析仪研制成功

一种小型化、便携式微型肾病快速生化分析仪在吉林省长春市诞生，并于不久前通过科技部“863”专家组的验收。2004年，由中国科学院长春光学机械研究所和厦门欧达科仪有限公司共同承担了国家“863”B项目“典型疾病快速检测微系统研究”工作。经过科研人员一年半的攻关，研制成功国内首台微型肾病快速生化分析仪，并完成了仪器的小批量试制工作，仪器的关键部件——微型光谱仪取得了生产许可证。     

欢迎订阅 欢迎投稿 欢迎刊登广告 《理化检验-化学分册》2017年征订启事北大核心CSCD

国际标准连续出版物号:ISSN 1001-4020 CODEN编码:LJHFE2国内统一连续出版物号:CN 31-1337/TB广告经营许可证号:3100920130028《理化检验-化学分册》杂志创刊于1963年,系由上海材料研究所与机械工程学会理化检验分会联合主办的技术类期刊。主要报道化学分析与仪器分析专业领域中的新方法、新技术、新设备以及国内外的研究方向。"面向生产、注重实用、反映动向、兼顾普及"是刊物的编辑方针,旨在最大幅度     

In Vitro Studies on Therapeutic Effects of Cannabidiol in Neural Cells: Neurons,Glia, and Neural Stem Cells

(‒)-Cannabidiol (CBD) is one of the major phytocannabinoids extracted from the Cannabis genus. Its non-psychoactiveness and therapeutic potential, partly along with some anecdotal—if not scientific or clinical—evidence on the prevention and treatment of neurological diseases, have led researchers to investigate the biochemical actions of CBD on neural cells. This review summarizes the previously reported mechanistic studies of the CBD actions on primary neural cells at the in vitro cell-culture level. The neural cells are classified into neurons, microglia, astrocytes, oligodendrocytes, and neural stem cells, and the CBD effects on each cell type are described. After brief introduction on CBD and in vitro studies of CBD actions on neural cells, the neuroprotective capability of CBD on primary neurons with the suggested operating actions is discussed, followed by the reported CBD actions on glia and the CBD-induced regeneration from neural stem cells. A summary section gives a general overview of the biochemical actions of CBD on neural cells, with a future perspective. This review will provide a basic and fundamental, but crucial, insight on the mechanistic understanding of CBD actions on neural cells in the brain, at the molecular level, and the therapeutic potential of CBD in the prevention and treatment of neurological diseases, although to date, there seem to have been relatively limited research activities and reports on the cell culture-level, in vitro studies of CBD effects on primary neural cells.     

Influence of Mg^2＋ on Initial Stages of CaCO3 Scale Formed on Metal Surface

Magnesium ions, which exist in formation water and injection water under downhole conditions in the oil and gas production industry, are a key determinant in the CaCO3 scale formation. Many studies have focused their attention on the effect of magnesium on the kinetics, the morphology and the content of Mg in the Ca-CO3 scale. Little attention has been paid to the effect of Mg^2 on the initial stages of CaCO3 formation on a metal surface. In this study, an electrochemical technique was used to study the influence of Mg^2 on the ini-tial stages of CaCO3 scale formed on a metal surface. With this electrochemical technique, the reduction of the dissolved oxygen in an analysis solution is considered on the surface of a rotating disk electrode (RDE) un-der potentiostatic control. The rate of oxygen reduction on the surface of the RDE enables the extent of sur-face coverage of scale to be assessed. With this electrochemical technique, a new insight into the effect of Mg^2 on CaCO3 scale formed on a metal surface is given.     

Removal of copper from aqueous solutions by adsorption on activated carbons

The adsorption isotherms of Cu(II) ions from aqueous solutions in the concentration range 40–1000 mg l⁻¹ on two samples of granulated and two samples of activated carbon fibres containing varying amounts of associated oxygen have been reported. The adsorption isotherms are type I of BET classification showing initially a rapid adsorption tending to be asymptotic at higher concentrations. The amounts of oxygen associated with the carbon surface has been enhanced by oxidation with nitric acid and ammonium persulphate in the solution phase and with oxygen gas at 350°C and decreased by degassing of the oxidized carbon samples at 400, 650 and 950°C. The adsorption of Cu(II) ions increases on oxidation and decreases on degassing. The increase in adsorption on oxidation depends on the nature of the oxidative treatment while the decrease in adsorption on degassing depends on the temperature of degassing. This has been attributed to the increase in the carbon–oxygen acidic surface groups on oxidation and their decrease on degassing. Suitable mechanisms consistent with the results have been proposed.     

我国稀土生物无机化学研究进展

我国稀土生物无机化学研究的特点是紧密结合稀土在农用及药物中应用所提出急需回答的问题, 经过长期的工作, 已在稀土的跨细胞膜运转, 稀土进入动物体内后的物种分布, 稀土与细胞膜的作用, 稀土对血红蛋白结构与载氧功能的作用, 稀土对骨细胞及骨结构的影响以及稀土在大鼠肝脏中的积累等方面取得了满意的结果. 从而可以为今后开展稀土元素在农用及药用中危险性评价的基础数据, 同时亦将促进稀土细胞化学的发展.     

The formation and production of nano and micro particles on clays under environmental-like conditions

Summary Metal ions are adsorbed in the interlayer space and on the edges of clay minerals, leading to the uniform distribution of metal ions on atomic scale. However, additional processes can be resulted in the formation of nano and micro particles in the interlayer space as well as on the outer surfaces. The formation of nano and micro particles on clay minerals under environmental conditions are discussed here in metal ions (manganese, lead, zinc, and silver ions)/bentonite systems. Two-dimensional nano layer is formed in the interlayer space by the oxidation of manganese ions under atmospheric conditions. Three-dimensional particles are formed on the surfaces initiating by the metal ion adsorption on the deprotonated edge sites. The formation of micro particles on the surface can also be followed by the redox reaction of metal ions.     

原位担载型煤直接液化催化剂的表征

 通过原位担载法将铁系催化剂担载于煤表面,考察了催化剂前驱体的相态、配位环境以及在载体表面的分散状态．采用X射线吸收精细结构和X射线衍射法对原位担载型铁系催化剂前驱体进行了表征．结果表明,催化剂前驱体在煤表面以非晶态、高分散的形式存在,其化学组成主要为FeOOH,且催化剂前驱体的分散程度与载体煤的物理化学性质有关．     

Nano-emulsions: New applications and optimization of their preparation

Nano-emulsions, as non-equilibrium systems, present characteristics and properties which depend not only on composition but also on the preparation method. Although interest in nano-emulsions was developed since about 20 years ago, mainly for nanoparticle preparation, it is in the last years that direct applications of nano-emulsions in consumer products are being developed, mainly in pharmacy and cosmetics. These recent applications have made that studies on optimization methods for nano-emulsion preparation be a requirement. This review is focused on the most recent literature on developments of nano-emulsions as final application products and on the optimization of their preparation.     

多相聚合物体系相界面研究进展

综述了多相聚合物体系相界面的形成、界面层状态的表征、界面层性质及其对体系性能的影响。重点论述了不同类型增容剂对界面行为的影响，其中对嵌段型增容剂的分子量、浓度等因素对界面行为的影响建立了定量关系；而对接枝型和无规增容剂对界面行为的影响研究较少，有待发展。指出了在界面张力、界面层厚度与多相聚合物体系性能，尤其是力学性能之间建立量化关系是高分子物理领域一个可以期待的发展方向。     

Studies of the adsorption of oligomers and surfactants on carbon and steel surfaces in a hydrocarbon medium

The adsorption isotherms for an (amino) terminally functionalised, oligomeric polyisobutylene and for a series of alkylpropoxylate or alkylbutoxylate surfactant molecules on carbon particles, in isooctane, have been obtained. The isotherms on carbon show that the oligomer is the most strongly adsorbing species. The surfactants show some evidence of forming aggregates on the carbon surface at higher concentrations. Analysis of the adsorption isotherms indicate that the size of these aggregates is similar on the carbon particles and on steel balls, reported previously, but that in some cases the actual adsorbed amounts on the two surfaces differ considerably. Ellipsometric studies carried out in situ on steel surfaces in isooctane show that only the polymer gives a relatively thick adsorbed layer. Addition of surfactant reduces the adsorption of the oligomer. There are some differences between the thickness values reported previously using AFM, compared to those found in the current work using ellipsometry, but in both cases it would seem that some degree of multilayer adsorption is occurring for the oligomer on steel in isooctane.     

Fluorimetric reaction detectors for high-performance liquid chromatography Part 2. Reactor materials and effects of variable dynamic dimensions

Summary Using selected steroid pairs some effects of the coupling of liquid chromatographic separations with derivatization after separation on band broadening are investigated. Derivatization with isonicotinoylhydrazid in organic solvents and the multi-step reaction of ketosteroids to form dihydrolutidin derivatives in aqueous solution are given as examples. The dependence of the resolution on the reactor materal, on the design of the reactor, on the linear velocity of the liquid stream in the reactor and on the ratio of the flow rate in the HPLC column and the reactor are examined.Part 1. Selection of Chemical reactions