三防纳米涂料的研究与发展

本文主要介绍了三防纳米涂料的设计理念,并简述了三方纳米涂料的构成包括成膜物质、颜填料、溶剂以及助剂;还介绍了三防的纳米涂料相应的配置机理以及制备方法,包括溶胶-凝胶法、共混法、原位聚合法、插层复合法四种;还对三防纳米涂料进行了相应的展望。     

紫外辐射微弱是极地上空臭氧层薄弱区的主要成因

大气中的Ｏ３主要是Ｏ２吸收阳光中的紫外辐射生成的；即使没有人为的臭氧消耗性物质，Ｏ３也在不断分解和消耗，Ｏ３的生成和消耗若能保持平衡，则臭氧层保持稳定，否则臭氧层将变稀薄；分析了极地冬半年大气受紫外辐射微弱，Ｏ３的生成量剧减，但Ｏ３的分解和消耗却在继续，结果出现臭 氧层薄弱区；认为北极必然与南极一样在科半年有臭氧层薄弱区。     

论内墙涂料施工技术

文章详细介绍了内墙涂料施工的一般要求、内墙涂料的选择原则,以及内墙涂料施涂工序,以期为同行提高内墙涂料施工质量提供借鉴。     

建筑涂料的广阔前景

论述了建筑涂料的发展现状和有利条件，指出了发展方向，预示了其广阔的发展前景。     

氟碳树脂及其在涂料中的应用

本文讨论了氟碳树脂的性质以及它们在涂料领域的应用，并对我国氟涂料的开发提出了建议。     

耐火纤维喷涂技术在苯乙烯蒸汽过热炉的应用

介绍了耐火纤维绵和结合剂的选用及喷涂技术要点，阐述了耐火纤维喷涂技术在大庆石化总厂化工厂苯乙烯蒸汽过热炉的应用情况。     

紫外可见分光光度计在食品检测中的应用

文章综述了紫外可见分光光度计工作原理、特点及在食品检测中的应用,并以北京普析通用仪器有限责任公司生产的TU-1810紫外可见分光光度计为例对以上内容作了简要介绍。     

An integrated scenario analysis for the metal coating sector in Europe

Although new paint products and technologies have been developed, the sector of paint application still contributes substantially to total volatile organic compound (VOC) emissions. Recent environmental legislation, especially the EU Solvent Emission Directive 1999/13/EC and its transposition into national law, coming into force in 2007, will have an important influence on the sector structure and the associated supply chain, especially for small- and medium-sized enterprises (SMEs). This paper summarises a comprehensive scenario analysis to explore possible future trajectories for the sector. The main focus is on paint application activities, considering in particular the consequences of new environmentally friendly products and technologies which can be used by SMEs. Four different scenarios representing possible future states of the sector are evaluated, taking into account environmental, technical and socio-economic aspects along the associated supply chain and life cycle. The scenarios allow the formulation of recommendations and guidelines for policy makers and industries. This example confirms that interdisciplinary scenario analysis is a suitable approach to investigate possible future development of an industrial sector.     

Credit History and the Performance of Prime and Nonprime Mortgages

Although nonprime lending has experienced steady or even explosive growth over the last decade very little is known about the performance characteristics of these mortgages. Using data from national secondary market institutions, this paper estimates a competing risks proportional hazard model, which includes unobserved heterogeneity. The analysis examines the performance of 30-year fixed rate owner occupied home purchase mortgages from February 1995 to the end of 1999 and compares nonprime and prime loan default and prepayment behavior. Nonprime loans are identified by mortgage interest rates that are substantially higher than the prevailing prime rate. Results indicate that nonprime mortgages differ significantly from prime mortgages: they have different risk characteristics at origination; they default at elevated levels; and they respond differently to the incentives to prepay and default. For instance, nonprime mortgages are less responsive to how much the option to call the mortgage or refinance is in the money and this effect is magnified for mortgages with low credit scores. Tests also reveal that default rates are less responsive to homeowner equity when credit scores are included in the specification.     

青霉素V钾片剂包衣技术改进

华北制药股份有限公司是国内惟一拥有青霉素V钾从发酵到制剂成套生产技术的企业。其产品率先在国内通过万例免皮试试验,与针剂青霉素相比,口服青霉素V钾片更安全,更经济。青V钾片原采用有机相包衣工艺,成本高又影响环保,而采用水相包衣可避免毒性的污染,对安全生产及产品质量均有很大益处。采用正交实验法确定水相包衣工艺参数为华北制药公司填补了一项空白,青霉素V钾片各项技术指标均符合药典标准。该技术节材降耗,经济效益显著。