除尘降噪打磨设备的设计

本项目将除尘和降噪的原理进行了分析，并将其进行综合，运用到了打磨设备上，解决了机械加工企业经常碰到的打磨噪音大、粉尘难以收集的问题。     

巴勒体育馆

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Effect of reuterin produced by Lactobacillus reuteri on the surface of sausages to inhibit the growth of Listeria monocytogenes and Salmonella spp

Reuterin is a bacteriocin produced by some strains of Lactobacillus reuteri. The strain used in this study was isolated from raw milk from a dairy farm nearby Ankara. Beef sausage is a long years produced bratwurst style meat product in Turkey, as well as in some other countries in the Mediterranean region. Sausages are produced by raw meat; sometimes lactic starter cultures are added or spontaneous fermentation is employed. The production and storage conditions of the product promotes the growth of Listeria monocytogenes and Salmonella spp. Although nitrate is added as an antimicrobial substance against many pathogens, sometimes however nitrate application is not preventive enough on the surface because of the natural film around the sausages. Since most of the contaminations take place at post production steps, pathogenic growth is more effective on the surface of the sausages in refrigerated conditions. In this study, reuterin was applied to the surface of the sausages in order to prevent the growth of these two pathogens along with nitrate used as an additive in the product. Reuterin has inhibited the growth of L. monocytogenes considerably but not of Salmonella spp. on the surface of the sausages.     

Solid dispersions of diflunisal-PVP: polymorphic and amorphous states of the drug

Coprecipitates of diflunisal and polyvinylpyrrolidone (PVP K15, K30, and K90) and physical mixtures were studied using x-ray diffraction analysis, infrared (IR) spectroscopy, differential scanning calorimetry (DSC), and hot-stage microscopy. X-ray diffraction results revealed an almost amorphous state, even in coprecipitates with a high content of drug, next to 70%, which was independent of the polymer molecular weight. The IR spectra of 70:30 drug-PVP solid dispersions suggest the formation of diflunisal-PVP hydrogen bonds. For 70:30 drug-polymer ratio, the physical mixture showed linear dissolution kinetics of free crystals, but the corresponding coprecipitates exhibit two different dissolution processes. When the 25:75 drug-polymer dispersion is analyzed by hot-stage microscopy, only solid plates of PVP are observed; the absence of drug particles may be due to a molecular dispersion of the drug into the polymer. Moreover, polymorphic changes of diflunisal were detected in the solid dispersions in comparison with the corresponding physical mixtures, which are always formed by polymorph II. At high concentrations of drug (75:25 and 80:20), x-ray diffraction patterns of solid dispersions showed the partial recrystallization of the drug, displaying the main diffraction peaks of polymorph I when ethanol was used as coprecipitation solvent, whereas diflunisal form IV was obtained in chloroform.     

液晶显示器,硬伤痊愈

钱经理不太相信自己的眼睛,眼前的新闻让他觉得有些不可思议,2006年3月,液晶显示器(LCD)的最快响应时间达到了1ms(毫秒)。响应时间,这个液晶曾经的“硬伤”显然是愈合了,从40ms以上到去年的8ms主流,直到刚刚推出的1ms,仅用了几年的时间。由于液晶面板制造技术的全面升级,加上几大主要面板生产商之间的价格竞争,带动了2005年下半年整个液晶显示器产品的价格下跌。到了今年,液晶显示器产品的价格仍然是继续下降。液晶显示器响应时间过慢和价格过高都已成为历史,钱经理的顾虑也减少了很多,毕竟在更多方面,液晶显示器有传统显示器不能比拟的优…     

“核能”引爆笔记本

刚进入2006年,英特尔全球发布了第三代移动计算平台—Napa平台,笔记本电脑的“双核”时代也随之开启。得知这个信息后,欧主管兴奋不已。自从笔记本进入欧主管的生活中,确实为欧主管带来了很多的方便。但有时候,笔记本在计算速度的处理上确实有不尽如人意之处。例如在处理复杂的图像和运行一些大型的如赛车类游戏,就会在速度和计算能力上明显不足。随着CPU市场竞争的白热化,单核心处理器已经遇到性能提升瓶颈,单纯的主频提升和二级缓存的增加已经不能大幅提高整体效能。据第三方权威机构评测数据显示,双核CPU比单核CPU性能提升最大达到76%。“2006年,双核将成市场主流,非双核产品将逐渐淡出。到今年年底,40%的英特尔台式CPU、70%的笔记本电脑CPU和85%的服务器CPU将向多内核设计发展。”看到英特尔有关人士这样的介绍,欧主管再也坐不住了,急忙打电话约来i博士和钱经理。     

条条大路通罗马

作为一家中型服装生产企业的CIO,钱经理感觉到自己身上的压力骤然增加了。前一阶段,领导和他一起参加了“中小型制造业信息化论坛”,回来后,就给他布置了新任务:要尽快上线企业的电子商务平台,并进一步完善企业原有的系统,该升级的升级,该扩展的扩展,决不能因为信息化的不足,让企业落后于同行。     

谁来“挽救”网吧

几年前，北京蓝极速网吧的场大火，使得网吧的安全问题引起了社会的关注加之一些网吧尚缺规范的作法，让人们对网吧褒贬不一。     

网络也要节约型 “大马拉小车”,浪费!

在听了《建设节约型社会动员报告会》之后.欧主管总觉得自己作为国家培养起来的新一代计算机专业人员.应该“从我做起.从今天做起”.为建设节约型社会.节约型单位做点什么?结合自己的工作实践.在办公用品的使用上注意节约.欧主管认为这是一个老生常谈的话题.更是一名企业员工应具有的基本素质.不足挂齿。“我能为节约型企业做点什么呢?”坐在机房里.欧主管苦思冥想.暂时没想到什么好的办法。不过.每当欧主管看到一组崭新的智能交换机.一字排列在自己的眼前时.他的嘴角就略显上翘.露出了一丝微笑.且显得有点得意。尽管这些智能交换机不是当今最新潮的.也没有达到万兆.但是对于欧主管所效力的企业来说.算得上是足够用了。当然.得意之处更在于.相比原来“要一流,最先进”的选型思路.这回欧主管为企业又省下了三成的费用。“这也应该算是为建设节约型单位做的一点贡献吧!”可是.欧主管细想起来.觉得在一些企业网络的建设中.“大马拉小车”的浪费现象比比皆是,有悖于“建设节约型社会”.更有悖于”建设节约型单位”。欧主管觉得.有必要叫上i博士和钱经理.对企业在网络建设和交换设备的选择上.好好地探讨一下.如何通过交换设备的“智能化”.让“马与车”匹配起来。     

在笔记本里建个制片厂

欧主管的集团今年又迈上了一个新台阶,由于企业规模不断扩大,知名度也随之上升,企业形象频频出现在电视报道中。为了加强宣传,集团领导希望将每次集团重大活动或会议的录像和照片随时进行剪辑处理,制作成宣传片,以便在洽谈业务或有贵宾来访时播放,给客户留下更深刻的印象。集团里人才济济,熟悉本职业务并有各种特长的人不在少数,刚来集团工作一年的总裁助理小王就是这么一位多面手。他来集团工作后很快就取得了成绩,受到领导重视并成为了业务骨干。小王又是个摄影、摄像行家,并会熟练使用多种图像和视频处理软件,而且能够准确领会领导所希望宣传的内容,所以他也承担起部分宣传片的拍摄和剪辑处理任务。小王目前所使用的其前任留下的笔记本电脑有些过时了,无法满足视频剪辑这样的大数据量工作,而他还要经常携带笔记本外出办公。于是小王打了份报告申请配备一台既可无线移动办公,又能满足大量图像处理、视频剪辑等工作的新笔记本电脑。为小王采购一台满足各方面要求的高性能笔记本电脑,就成了欧主管责无旁贷的任务。