彩棉弹力织物的开发

采用彩棉、白棉和LF纤维三元混纺纱线开发了彩棉弹力新品.文章在分析彩棉性能的基础上介绍了彩棉弹力织物的产品设计和生产技术要求.     

分享知识——一种全新的在线支持和培训方法帮助Raytheon办公室的用户更好地工作

IT人员的主要工作之一是向用户培训关于Microsoft Office和其它应用程序的基础知识。但是这类培训能够把完成特定工作并不是一般任务时所需的正确知识传授给他们吗？按照Pamela Leal，Raytheon公司的信息知识与管理主管的说法，对于Raytheon公司的用户来说，这个问题的答案是肯定的。但是3年前，Pamela和Raytheon公司IT管理部门的其他同事都意识到用户在使用像Microsoft Excel、Word和Power Point一类的Office应用软件时并没有充分发挥它们的效率。     

2006社区英雄——2006：Windows IT创新年

2006年的九位“Windows IT Pro创新者”大奖得主向我们展示了日常技术在他们手里是如何被神奇地转化为尖端解决方案的。[编者按]     

Exchange集锦

很多企业都不愿意使用SharePoint Portal Sewer的事件日历，因为他们对Exchange的公用日历十分满意并且拒绝迁移到SharePoint平台。下面我为大家提供如何将Exchange公用日历与SharePoint进行集成的办法。     

再生蛋白纤维的研制及性能分析

利用某些不可纺蛋白质纤维或废弃蛋白质材料成功研制了再生蛋白纤维,这种纤维性能优异,生产工艺流程简单,具有较好的发展前景。     

Phosphate application to firing range soils for Pb immobilization: the unclear role of phosphate

Phosphate treatment has emerged as a widely accepted approach to immobilize Pb in contaminated soils and waste media, relying on the formation of the highly insoluble mineral pyromorphite as solubility-controlling phase for Pb. As such, phosphate treatment has been proposed as a Best Management Practice (BMP) for firing ranges where Pb occurs in its metallic forms and several other phases (carbonates, oxides). While pyromorphite thermodynamically has the potential to control Pb solubility at low levels, its formation is kinetically controlled by pH, the solubility of the phosphate source, and the solubility of Pb species. Treatability studies have shown that excess quantities of soluble and acidic phosphate sources, such as phosphoric acid, are necessary for successful in situ treatment. Even under these conditions, Extended X-ray Absorption Fine Structure (EXAFS), the only reliable method to identify and quantify Pb speciation, showed that Pb conversion to pyromorphite in in situ treated soils was less than 45% after 32 months. Furthermore, the use of lime (CaO) to restore soil pH in acidified soil treatments inhibited further conversion. Additionally, phosphate treatment is known to reduce bioavailability through pyromorphite formation in the intestinal tract, and the phytoaccumulation of Pb; both desirable effects for Pb-impacted areas. Given the costs of phosphate treatment, the use of biogenic phosphate sources, such as bone meal, may be a more environmentally sustainable approach toward this end. In the many studies focusing on phosphate treatment, the attendant P leaching and eutrophication have been largely overlooked, along with other issues such as the enhanced leaching of oxyanionic contaminants, such as Se, As and W. The success and sustainability of applying phosphate as a BMP in firing range soils therefore remain questionable.     

Exergy: its potential and limitations in environmental science and technology

New technologies, either renewables-based or not, are confronted with both economic and technical constraints. Their development takes advantage of considering the basic laws of economics and thermodynamics. With respect to the latter, the exergy concept pops up. Although its fundamentals, that is, the Second Law of Thermodynamics, were already established in the 1800s, it is only in the last years that the exergy concept has gained a more widespread interest in process analysis, typically employed to identify inefficiencies. However, exergy analysis today is implemented far beyond technical analysis; it is also employed in environmental, (thermo)economic, and even sustainability analysis of industrial systems. Because natural ecosystems are also subjected to the basic laws of thermodynamics, it is another subject of exergy analysis. After an introduction on the concept itself, this review focuses on the potential and limitations of the exergy conceptin (1) ecosystem analysis, utilized to describe maximum storage and maximum dissipation of energy flows (2); industrial system analysis: from single process analysis to complete process chain analysis (3); (thermo)economic analysis, with extended exergy accounting; and (4) environmental impact assessment throughout the whole life cycle with quantification of the resource intake and emission effects. Apart from technical system analysis, it proves that exergy as a tool in environmental impact analysis may be the most mature field of application, particularly with respect to resource and efficiency accounting, one of the major challenges in the development of sustainable technology. Far less mature is the exergy analysis of natural ecosystems and the coupling with economic analysis, where a lively debate is presently going on about the actual merits of an exergy-based approach.     

竹原纤维酶处理的纤细化效果

为了探讨竹原纤维酶处理纤细化的有效方法,应用漆酶、精练酶及精练酶+漆酶二步法经正交设计对已制得的竹原纤维进行纤细化处理试验,测定酶处理后竹原纤维的细度变化率、木质素含量及强度。结果表明:精练酶去除木质素的效果比漆酶好,而精练酶+漆酶二步法处理的效果均较精练酶或漆酶单独处理为好,二步法处理后竹原纤维的细度变化率为51.33%,木质素含量从原来的18.98%降为5.49%。