REACH法规实施细则解读(二)

5 实施REACH法规的负面影响 2003年,欧盟委员会在其对化学品生产商和进口商的测试和注册费进行评估后的报告中称,估计在11年内(2008年至2018年),由测试和注册产生的直接成本总计约23亿欧元.如果有1%～2%的物质停止生产,面临高额替代时,下游用户将增加成本5～13亿欧元.这是针对欧盟范围内的化工企业和下游用户而言的.     

贝先国烹制的湘菜香飘沈阳

贝先国,现年31岁,从厨近20年,湖南测阳人,先后在长沙、郑州、北京等地工作,高级烹调技师,他曾在郑州市烹饪比赛获得金奖,现任丽湖蒸菜厨师长.丽湖蒸菜于2005年12月5号开业,其中三好旗舰店坐落于沈阳的IT中心三好街,营业面积600平方米,食物以湘菜为主,并根据东北的口味进行了改良,从色香味上看都属精品.店面布置得很优雅,大厅明亮,半隔断的小包房也很温馨.     

"5.12"汶川特大地震给四川工商职业技术学院造成巨大损失

本刊讯 "5.12"四川汶川8.0级特大地震,给地处都江堰市,紧邻地震中心汶川映秀镇的四川工商职业技术学院造成了巨大损失.地震袭来.建筑物左右摇晃,天花板和墙壁装饰纷纷脱落,电脑、文件柜等办公设备纷纷倒塌,学生7号宿舍、素质拓展馆和活动中心的半面墙壁轰然塌下.     

千年酱文化水乡得发扬——"2007中国首届酱文化国际高峰论坛"在浙江绍兴隆重举行

中国第一座酱文化博物馆开馆祭祖庆典暨2007中国首届酱文化(绍兴)国际高峰论坛于12月15日在浙江绍兴隆重举行.15日上午,在绍兴县平水镇的绍兴至味食品有限公司厂区内的中国酱文化博物馆门前,举行了盛大的开馆庆典及祭祀酱园鼻祖蔡邕仪式.开馆仪式结束后,有来自中、美、意、日、韩、新、泰七国和港台两地区的300多名专家、学者和企业家,又参加了于12月15日下午至17日,在浙江省绍兴隆重举行的"2007中国首届酱文化(绍兴)国际高峰论坛".     

小米的化学成分及物理性质的研究进展

系统地介绍了国内外对小米中各种化学成分及其营养保健功能的研究进展,包括碳水化合物、蛋白质和氨基酸、脂肪及脂肪酸、维生素、矿物质和微量元素、色素、肌醇、黄酮、多酚等的含量及营养保健功能.同时,对小米物理性质方面的研究进展也做了介绍.     

"头羊"的代价——参加中国(广东)国际印刷技术展首日走笔

中国(广东)国际印刷技术展览会作为北京国际印刷技术展览会的姊妹展,4月10日上午一开幕,立刻博得了满堂彩.为确保来参加展览的车辆及观众顺利进入现场,主办方得到了当地政府交管部门的支持,对展览馆附近一些道路进行了疏导,不相干的车辆及行人被有效疏散到别的地方.尽管首日上午阴雨绵绵,但丝毫没有影响到馆内汹涌的人流.     

中国黄酒的科研现状及发展

论述了中国黄酒近年的发展与行业整体科技水平的提升。酿造企业在设备上已,一泛实现了机械化与半机械化;工艺技术上在传统工艺的基础上应用了新工艺与新技术,提高了产品的质量安全水平;产品包装上出现了精美高雅的各式包装：产品品种上以新风格口感为导向,开发改变了单一的风格特征;在功能性研究上,除发现了γ-氨基丁酸外,还对黄酒中的功能性物质进行了深入的研究。     

中国名牌的综合效应——考量国产胶印机的诚信标杆

近年来,"中国制造"已经势不可挡地崛起并成为助推全球经济发展的强大动力.上海光华同北人、中景、大族冠华等一批优秀的单张胶印机制造商一道,在"中国制造"的世界潮流中,或争相推出高性价比的替代进口产品,或积极参与国际贸易把单张胶印机导入海外市场.目前,我国已经拥有几十家胶印机制造商,拥有年产销万余台胶印机的能力,能够满足国内10万家印刷企业90%以上的胶印机市场数量型需求,能够把胶印机销售到全球几十个国家.在这样的背景下,提出培育中国胶印机名牌的课题,从时机和条件方面看,都具备了相当的基础.     

全球标签市场现状及展望

到2011年,全球标签产量将达到500亿平方米,年增长率为7%总产值将达1000亿美元,年增长率为9%左右.受全球包装市场扩张的影响,特别是特殊饮料、个人护理产品和医药产品的异军突起,全球标签市场的发展前景也将更加广阔.此外,随着世界的不断发展,先进的物流和数据处理系统在发展中国家的普及、尖端技术的开发和渗透以及增值标签功能的日益完善也将为标签业的发展起到重要的推动作用.     

HAVE A REST——欧宝卡车情景

正我对二战轮式车辆一直比较喜爱,而自己一直没有做过二战德军的卡车系列,在看了很多高手的卡车作品后自己也想开工一辆,我最终选择了制作一辆经典的欧宝3吨4×2卡车。欧宝卡车作为二战德军重要的轮式车辆,不仅产量很大而且根据不同的用途又衍生出了很多不同的型号,货厢版是最基本的欧宝3吨卡车,也是群众基础最好的一个版本,但正是因为做的人太多,对于我这种追求"个性"的人来说,做一个普通的货厢版无疑是缺乏吸引力的。为了让自己的欧宝卡车能别具一格,我查阅了一些欧     

纺纱牵伸胶辊胶圈应用技术概要

阐述棉纺牵伸胶辊、胶圈的应用技术和牵伸原理,重点探讨了胶辊、胶圈的牵伸工艺特性及其合理配置、胶辊制作、周期管理、质量管理、使用管理、产品缺陷与其机械波分析、纺纱环境和挡车工操作水平对纺纱性能的影响,提出胶辊、胶圈有关机件的质量要求等。     

赛络纺纱钢领、钢丝圈的选配实践

为了提高赛络纺纱成纱质量,减少细纱断头,从钢领、钢丝圈的种类,卷绕过程中对纺纱的影响及其运动配合等诸多因素出发,论述了钢领、钢丝圈的选配原则,重点阐述了赛络纺纱钢丝圈运动形态的变化及钢领、钢丝圈的选配要求,通过纯棉、非棉纤维纺纱的选配实践,指出赛络纺纱线毛羽少,结构紧密,应根据纺纱纤维性能和纺纱特点,以纱线通道通畅降毛羽、运行平稳少断头、散热良好延长使用寿命为原则对钢领、钢丝圈进行选配。     

高校宝石及材料工艺学专业的构建研究

通过回顾高校宝石及材料工艺学专业的创建历程,深入探讨了该专业未来发展所面临的、深层次的理论问题,即学科属性与文化背景,学科构成与知识内涵,学科方向与实践定位,学科任务与社会功能。在此基础上,建立了多层次技术教育的社会功能模型,由此推断：高校中的宝石及材料工艺学专业属于多层次技术教育中的高等职业技术教育。同时,还构建了该专业的技术教育的社会功能模型和学科构成模型,进一步确立了该专业的社会实践定位。     

服装的空间形态辨析

从分析服装空间形态的构成要素入手,通过中西方服装空间形态的比较,阐述服装形态在空间关系上的相关问题,对服装的形态类型、要素构成和内外构成等方面进行了较详细的探讨和分析,印证了人类在同一服装原生状态基础上所产生的造型差异,是由于不同人对服装空间形态的认识方式和服饰审美观念存在差异所致。认为无论是东方式的平面构成或是西方式的立体构成,服装的形态都是在不同时代、不同地域和文化中被人们以不同的空间构成方式创造出来的。辨析服装空间形态及其构成方式,为现代服装的造型设计提供了一条丰富服装创意思维的现实途径。     

Human risk assessment and TEFs

The concept of toxic equivalency factors (TEFs) has been developed to facilitate risk assessment and regulatory control of exposure to complex PCDD, PCDF and PCB mixtures. Recently the European Centre for Environment and Health of the World Health Organization (WHO-ECEH) and the International Programme on Chemical Safety (IPCS) jointly reevaluated the TEFs of PCDDs, PCDFs and dioxin-like PCBs for mammals and derived consensus TEFs for birds and fish (Stockholm, 1997). From a mechanistic point of view it can be concluded that, although the quantitative response will vary depending on the congener involved, the occurrence of a common mechanism (binding to the Ah receptor) legitimates the use of the TEF concept across species. But there also is criticism regarding the TEF concept. Pharmacokinetic differences between species can significantly influence the TEF value, and uncertainties due to additive or nonadditive interactions, to differences in species responsiveness and to differences in the shape of the dose response curve might hamper the derivation of consensus TEF values. In this context it should be noted, however, that using TCDD alone, as the only measure of exposure to dioxin-like PCDDs, PCDFs and PCBs, would severely underestimate the risk from exposure to these compounds. Therefore, it can be concluded that, for pragmatic reasons, the TEF concept remains the most feasible approach for risk assessment purposes, in spite of the uncertainties associated with its use.     

39—THE FLOW OF LIQUID FROM A JET THROUGH A COMPRESSIBLE POROUS LAYER. PART III: THE CHARACTERISTICS OF LIQUID FLOW THROUGH A COMPRESSIBLE LAYER OF LOOSE WOOL

The effects on the conditions of flow of the surface and configurational properties of the fibres in a compressible porous layer are discussed. The characteristics of a layer of wool are evaluated, and its compressibility is determined. It is shown that, when a liquid of initial uniform pressure flows through a compressible porous medium, the pressure gradient within the medium increases with the distance of flow. The resulting pressure drop is found to depend on a function of the ratio of the downstream to the upstream porosity of the compressible medium. Experimental results are reported for permeable flow through various layers of loose wool; these indicate that, when the flow is disturbed turbulent, the pressure drop through the layers is proportional to the square of the filter velocity. This result is not readily apparent from the graphs of pressure drop against filter velocity because of the compressibility of the fibres.     

集体落纱快装纱管用铝杆锭子设计

为提高空纱管安装效率,分析集体落纱细纱机特点,介绍了锭子杆盘结构型式,说明目前国内铝杆锭子多采用支持器弹簧加支持器帽的结构,虽能基本满足集体自动落纱细纱机的生产需要,但仍存在机械手安装空纱管时动作较多、动作精度不高、且易撞到锭子问题,易对锭子造成损坏并缩短锭子使用寿命的缺陷,重点对新设计的快速安装纱管的铝杆锭子的结构及原理进行分析,指出将弹簧支持器帽换成钢珠,可以大大缩短集体落纱细纱机机械手安装空纱管时间、降低对机械手动作精度的要求,且不损坏锭子、不影响锭子使用寿命,实现了节能降耗、安装效率高的目的。     

11—AN INVESTIGATION OF THE AIR-JET BULKING PROCESS

Experiments aimed at investigating the mechanism of the air-jet bulking or texturing process led to an interesting observation that the textured yarn emerging from the venturi was rotating in such a way as would temporarily untwist the yarn while it was in the jet. The indication is that false-twisting (or untwisting) occurs owing to the vorticity of the turbulent air in the wake of the yarn feed needle that bifurcates the air-stream. The various yarn-processing conditions separately affect the amount of false twist inserted. There is evidence to show that the direction of the vortex, and hence of the untwisting action, is dependent on whether the angular displacement of the feed needle from its central position is in a clockwise or anti-clockwise direction. A suggested mechanism of the process based on the untwisting and retwisting of the overfed filaments offers an explanation for the characteristic locked-in loop structure of air-bulked yarns.     

Combined microscopic and dynamic rheological methods for studying the structural breakdown properties of whey protein gels and emulsion filled gels

The microstructural and large deformation rheological properties of model food gels were studied by performing notch propagation tensile testing on the gels using a tensile stage and observing changes in the microstructure of the gels during tensile testing using confocal laser scanning microscopy (CLSM). Heat-set whey protein (WP) gels containing either added sodium caseinate (NaCN) or sunflower oil droplets emulsified with WP or NaCN as the emulsifier protein were prepared in 0 or 50 mM NaCl. The WP gel structure strengthened in the presence of added NaCl and NaCN. The rheological properties of WP gels containing sunflower oil droplets emulsified with WP or NaCN were influenced by the NaCl concentration, oil concentration and extent of oil droplet aggregation in the gel or by the type of emulsifier protein used. During tensile testing, the notch length in all gels increased above a certain critical stress, leading to fracture of the gels through the notch. Also, the microstructural changes in the oil phase of emulsion filled gels subjected to tensile testing were influenced by the structural properties of the WP gel matrix and the proximity of the oil droplet to the fracture path.