Technique for repair of Descemet membrane detachment

Tuberculous infection of the esophagus is a rare disease and usually occurs secondary to tuberculous mediastinal lymphadenopathy. We report a 74-year-old woman presenting with dysphagia and weight loss. The chest radiograph showed punctuated calcifications lining from the right hilar region to the paracardiac region. Upper gastrointestinal endoscopy revealed a 0.5 x 5 cm lesion localized in the 25th cm of the esophagus covered partly with normal mucosa, partly demonstrating ulcerous areas. Biopsy revealed granulomatous infiltrates being tuberculoid in type. Thorax CT showed a calcified lymph node at the right hilum. The patient did not give consent to therapy and died 1 month later.     

Recent developments in two-pack water-based epoxy coatings

In recent years new curing agent technology has been developed which allows water-based curing agents to be introduced into high performance coating, these are classified according to the type of epoxy resin used. Type I utilises low molecular weight, liquid epoxy resins and Type II pre-formed dispersions of higher molecular weight solid epoxy resins. The chemical composition of the binder of water-borne epoxy coatings plays a critical role in their performance properties, hence some of the structural properties of the amine hardeners will be reviewed. New curing agents will be discussed which demonstrate the versatility these products can offer to the coating formulator. Performance data of clear coats and anti-corrosive primers confirm the applicability of the new systems for the long term protection of steel and concrete surfaces.     

西藏雅江雪牛与牦牛肉质特性比较研究

目的研究雅江雪牛与牦牛肉食用品质及营养成分含量的差异。方法选择健康成年(5～7岁)的西藏公牦牛、公雅江雪牛和母雅江雪牛各6头,对其体尺、背最长肌基本营养成分和氨基酸、脂肪酸以及食用品质指标进行分析。结果雅江雪牛肉的蛋白质含量较丰富,属于高蛋白性食品。公雅江雪牛和母雅江雪牛肉中必需氨基酸与总氨基酸的比值(essential amino acid/total amino acid,EAA/TAA)分别为44.7%和44.8%,必需氨基酸与非必需氨基酸的比值(essential amino acid/nonessential amino acids,EAA/NEAA)分别为80.7%和80.8%,表明雅江雪牛肉为优质蛋白;雅江雪牛的脂肪含量较高,相对于普通牦牛,具有更好的风味品质;雅江雪牛蒸煮损失率较低,具有较好的加工性能;雅江雪牛颜色鲜红,更符合消费者喜好。结论雅江雪牛生长速度快,脂肪含量相较于传统牦牛明显升高,能够在西藏有限的牧草资源环境中产生相对于牦牛更高的经济利用价值,对西藏地区的肉牛产业起到良好的促进作用。     

采用奥钢联DYNAGAP轻压下技术的六流大方坯连铸机

1前言 2001年9月奥钢联得到了为攀枝花钢铁公司6流大方坯连铸机供货的合同.该连铸机设计年生产能力为120万t,将生产280mm×325mm和280mm×380mm两种规格的大方坯,为现有的轧机供应坯料,如图1所示.铸机的特点是配备有DynaGap轻压下技术包.     

基于多参数加权分数阶傅里叶变换的星座预编码系统研究与实现

针对当前多参数加权分数阶傅里叶变换(Multiple Parameters Weighted-type FRactional Fourier Transform, MP-WFRFT)星座特征缺乏定量研究的缺限,该文提出一种新型的星座叠加数学模型。通过分别研究信号的时域及频域分量,给出了星座模糊及裂变的定性及定量分析结论,并搭建了基于MP-WFRFT的星座预编码系统。通过构建相关混合整数优化模型,并利用遗传算法进行模型优化,进而设计出符合预期通信需求的预编码系统。经仿真分析,验证了所提出的星座叠加数学模型及优化方案的正确性;同时通过USRP硬件平台测试表明了所搭建的基于MP-WFRFT星座预编码系统的可行性。     

生态安全背景下的城市生态建设再思考

快速城市化伴随各类环境污染、生物多样性质量下降、生态系统服务功能退化、疾病蔓延等城市问题,直接威胁着城市生态安全乃至人类生命健康.基于对"生态"一词源流与内涵的梳理,倡导汲取传统生态智慧,运用"生命观、动态观、系统观"辨析和破解城市生态建设及管理方法中存在的问题与误区.结合上海生态实践,通过营建以乡土植物和土著动物为主...     

PRODUCTION AND CHARACTERIZATION OF THE CASHEW APPLE (ANACARDIUM OCCIDENTALE L.) AND GUAVA (PSIDIUM GUAJAVA L.) FRUIT POWDERS

Cashew apple and guava residues from fruit juice processing industry were prepared as dehydrated fruit powders. Differences in compositional and physicochemical characteristics between both fruit powders were significant at the 5% probability level, with exception to ash content. It is important to point out that despite the dehydration process, both samples can still be considered good sources of vitamin C. In addition, the results show that the guava and cashew apple powders may be useful in the food industry as high dietary "fiber ingredients." Higher lipid (14.05%) content was observed in guava powder. The guava powder could be an alternative source of lipid. The data also indicated that these materials are good sources of ash. The results suggest further utilization of these residues as valuable food ingredients or as a resource for nutraceuticals.

PRACTICAL APPLICATIONS

Large quantity of agro-industrial residues formed by fruit juice extraction represents a major disposal problem. An alternative to recycling the fruit-industrial residue is to submit it to drying processes and transform into value-added products as dehydrated fruit powder. In this way, this process contributes to diminish the problem and to recover valuable biomass and nutrients. The purpose of this study was to develop a technology to obtain guava and cashew apple powders with the objective of finding alternatives to the exploitation of these residues as valuable sources of vitamin C, as ashes and lipid that should also be regarded as potential nutraceutical resources in future or functional ingredients.     

金属推型V-带无级变速箱损耗机理仿真部分1:带组摩擦造成的转矩损失

以推型金属带为基体的无级变速箱(CVT)的动力传递效率低于有级变速箱,大家已往认识到采用CVT改进发动机/负荷匹配新取得的燃料经济性的好处有被取消的趋势.本组三篇论文详细阐述了发生在作为第一级用来取得效率改进的带传动中损耗机理的研究.已经进行试验研究了涉及推型金属V-带CVT空载和低载的转矩损失.本第一篇论文述及发生在金属带CVT由于带推块和带间相对运动造成主要转矩损失的新分析方法.本研究考虑到其他研究中的新发现并改进了金属V-带的设计.本文中采用几种不同的试验方法提供的实验数据推荐了转矩损失的数字模型.本组第二篇论文阐述了由于带轮变形的许多附加转矩损失机理.在第三篇论文中阐述了根据本文的发现提出带滑动损失的分析.     

贵州榕江县八蒙地区锑矿床地质特征及找矿远景

八蒙锑矿床位于扬子准地台与华南褶皱带之间的过渡带,是雷公山Sb-Pb-Zn-Cu成矿带上的重要组成部分。通过对八蒙地区锑矿床地质特征及成矿地质条件进行分析,认为该矿床的形成主要受地层岩性和构造条件控制。结合前人研究成果,探讨了矿床的成矿物质来源和形成过程,并计论了该区找矿远景,供区内后续找矿工作参考。