1760／250造纸机全数字直流调速系统

１７６０／２５０造纸机全数字直流调速系统何传础，王英１前言自七十年代起，模拟可控硅直流调速系统，曾广泛用在造纸机械上，收到了预期的社会效益和经济效益。随着纸机车速的不断提高，非木材纤维的广泛使用，新工人逐渐增多，对电气传动系统的精度、可靠性、稳定性提...     

清净微机监控系统

0引言近几年来微机在石油、化工、轻工、冶金、造纸、电厂等各各行业应用日趋广泛，但在制糖工业中应用还不太多。我厂于1996年装备清净微机监控系统，通过一个生产期的使用来看，效果非常好，我们认为有必要推广使用，让制糖行业中的同仁更多地了解该清净微机监控系统的使用价值。本文以我厂上的DMC－502型清净微机监控系统的情况及产生效益，谈一谈应用体会。1微机的硬件该清净微机监控系统是专用型计算机控制系统，它可以广泛用于制糖生产的各个工段的监测、控制。该系统运行可靠，使用直观明了，操作简单方便。1．1主要性能问）本系统…     

变频调速起重机起升动载特性

变频调速技术目前已经被广泛的运用于调速系统上，在起重机调速系统上的运用，变频调速技术是最新成就，相比于以前的直流调速、能耗制动调速而言，性价比更高，更加安全，从上世纪九十年代开始便得到广泛的运用。本文分析了变频调速技术的工作原理，变频调速技术运用于起重机的优缺点，分析变频调速起重机的起升动载特性。     

颜色技术原理及在印染中的应用(九)第七篇色序系统

色序系统是颜色按照感知色表特性在空间中的有序排列，其对应的颜色空间即为颜色立体。孟塞尔颜色系统是最典型的色序系统，此外，还有自然色系统、美国光学学会均匀颜色标尺系统等颜色系统，其相应的标准色卡在工业中得到了广泛的应用。     

直流调速系统——关于闭环调速系统的分析

直流调速系统———关于闭环调速系统的分析广东维达纸业股份有限公司高秀祥电力拖动系统中，应用比较普遍的是自动调速系统，而直流电机以其良好的启动，制动性能，大范围地平滑调速，广泛应用于造纸机、矿井卷扬机、轧钢厂等领域。直流电机的转速ｎ＝（Ｕ－ＩＲ）／Ｋ...     

斯托克印制系统（无锡）有限公司-meccanica豹8数码印花机

这款新颖的数码印花机拥有8个京瓷喷头，广泛适用于水性墨水，墨滴尺寸可变，每个喷头配备微电机驱动自校准系统，可以进行高精度单向和双向打印、墨水系统开放．软件系统可适配于任何印花RIP系统。印花速度最高可达180m／h。     

离线质量检测系统对烟包印刷氽业的积极意义要远大于在线质量检测系统

与人工检测相比，质量检测系统具有速度快、效率高、检测结果标准化等优点，因此受到了业界的广泛关注。尤其是近年来，其检测能力和可靠性不断完善，所以可以肯定的是．质量检测系统将会获得快速发展。     

提高计算机测色配色系统应用精确度的途径

计算机测色配色系统在生产实践中的应用正日益广泛。为更充分地发挥系统应有的效能，文章结合印染用测色配色系统的生产实践，从测色、颜色质量控制、配色、数据管理和系统维护等方面给出了提高测色配色系统应用精确性的一些途径和方法。     

组团式大型小区智能化系统设计

由于组团式智能化系统存在诸多优点，所以它越来越被广泛的应用在大型小区的管理工作中。每个物业管理中心针对不同小区的特点都会制定出不同的管理层次，智能化系统的纽网、设置要充分的配合管理层次，子系统要采取单独组网的方式。本文对组团式大型小区智能化系统进行了系统、全面的探讨，在系统知识介绍的同时，也使该系统的重要性得到了体现。     

基于CAN总线的造纸实验室自动测试系统的研究

本文提出了一种基于CAN总线的造纸实验室自动测试系统，并对该系统的总体设计、硬件配置和软件功能进行了具体分析。实验表明，该系统能够实时采集造纸实验室各种分析仪器的测试数据，实现数据记录、传输、分析、存储和查询的无纸化，具有结构简单、可靠性高、通信速度快等特点，有广泛的市场应用前景。     

酒店如何建立交叉销售营销系统

本文通过对交叉营销理论的分析，系统讨论酒店应如何建立客户CRM系统，并根据自己在酒店工作的实际经验，提出了具体操作方法和步骤，同时对酒店应用交叉营销服务的优势进行了总结。     

采用苯基荧光酮测定野蒜和食蒜中锗的含量

以2,3,7-三羟基-9-（2-羟基-5-对甲苯偶氮）苯基荧光酮为显色剂,测定了野蒜和食蒜中锗的含量,加标回收率在91．04％～102．83％,且该方法灵敏度和选择较高。     

蒸汽喷射压缩器的设计及实验研究

探讨了蒸汽喷射压缩器理论设计与实验结果的差异，分析了其原因，为精确设计计算喷射压缩器提供了一定的参考价值。     

新型香料1,1,3,3-四苄基-2,4,5-三硫环戊烷的合成及热分析研究

以乙酸酐为催化剂,中间体二苄基二硫醇和碘为原料,无水乙醚为溶剂,合成了新型香料1,1,3,3-四苄基-2,4,5-三硫环戊烷,产率为82.5%,用差示扫描量热法（DSC）和热重法（TG）研究其热性质,加热温度为50℃至500℃,加热速率10℃/min,测量氛围为静态空气.结果表明,在257.1℃开始分解,应在257.1℃以下保存,适用于汤料调味品而不适用于烧烤类调味.     

仿生型信号分子对烟草硝酸盐、亚硝酸盐的抑制作用

硝酸盐、亚硝酸盐是烟草特有亚硝胺(TSNAs)的前体物。用源于取食烟草的寡食性昆虫口腔分泌物的仿生型信号分子(BSM)物质,在不同浓度下,对烤烟和白肋烟打顶后伤口进行涂抹处理,用比色法检测处理株和对照株烟叶中NO3-,NO2-的含量,并分析BSM对烟草NO3-,NO2-的影响。结果表明:BSM物质对烤烟和白肋烟打顶后叶片中NO3-,NO2-有不同程度的抑制作用;BSM处理对中部叶NO3-和NO2-含量影响大于上部叶、对NO3-的抑制作用强于NO2-;在白肋烟上,BSM对NO3-和NO2-含量的抑制程度与剂量有关,BSM的浓度越高,处理株中NO-和NO-含量越低。     

Cloning and expression of NAD+-dependent L-arabinitol 4-dehydrogenase gene (ladA) of Aspergillus oryzae

A gene of Aspergillus oryzae, ladA, which encodes L-arabinitol 4-dehydrogenase (EC 1.1.1.12), and its cDNA were cloned in Escherichia coli. The gene consisted of a 1209-bp coding region, interrupted by a 59-bp intron, which encoded a 382-amino-acid polypeptide (40,812 Da). The protein showed 67% identity to a well-studied L-arabinitol 4-dehydrogenase (Lad1) of Hypocrea jecorina. The cell-free extract of E. coli, which expressed ladA cDNA, showed L-arabinitol dehydrogenase activity with NAD+. It was also reactive for ribitol and xylitol.     

Therapeutic use of phage cocktail for controlling Escherichia coli O157:H7 in gastrointestinal tract of mice

To investigate the therapeutical use of phage mixture for controlling gastrointestinal Escherichia coli O157:H7 cells, in vitro and in vivo experiments were conducted. Three phages, SP15, SP21, and SP22 were selected from 26 phage stock screened from feces of stock animals and sewage influent. Addition of single or binary phage to the E. coli cell batch-culture reduced the turbidity of the culture. However, reascend of the turbidity due to the appearance of phage resistance cell was observed. On the other hand, addition of three phage mixture (SP15-21-22) did not produce reascend of culture turbidity under aerobic condition. Under anaerobic condition, slight reascend of culture turbidity was observed after SP15-21-22 addition. Chemostat continuous culture was operated under anaerobic condition to optimize the titer of phage cocktail and frequency of the addition for controlling E. coli cells. Five-log decrease of E. coli cell concentration after addition of phage cocktail of 10(9) Plaque forming unit (PFU)/ml was observed. However, reascend of cell concentration was observed after 1 d incubation. Repeated addition of phage cocktail was effective to reduce the cell concentration. Suspension of phage cocktail in the buffer containing 0.25% CaCO3 neutralized 9 times much more buffer of pH 2. Based on this in vitro experiment, phage cocktail (SP15-21-22) suspended in the buffer containing 0.25% CaCO3 was orally administrated to the mice in which E. coli O157:H7 cells was administrated in 2-d advance. E. coli and phage concentration in the feces was monitored for 9 d after phage addition. High titer of phage was detected in the feces when the phage cocktail administrated daily. E. coli O157:H7 concentration in the feces has been reduced according to the time period. However, difference of E. coli concentration in the feces of mice administrates with phage and in the control mice without phage addition became slight after 9-d test period. High titer of the phage settled down in the gastrointestinal tracts and reduced the concentration of E. coli cell. Repeated oral administration of SP15-21-22 was effective for rapid evacuation of E. coli O157:H7 from the feces and gastrointestinal tract of mice.     

2-(4′-乙基苯甲酰基)苯甲酸合成工艺研究

为了实现蒸煮助剂2-乙基蒽醌(2-EAQ)的合成绿色化,首次在缩合反应中,以水为溶剂,热处理过的明矾为催化剂,乙苯和苯酐为原料,制得2-(4′-乙基苯甲酰基)苯甲酸(BEA);BEA经过脱水闭环反应得到2-乙基蒽醌(2-EAQ);对BEA和2-EAQ进行定性分析.试验结果表明,合成BEA的最优反应条件是:苯酐加料速率0.12 g/min,反应温度40℃,搅拌速度520 r/min.     

鲜湿面生产新工艺

用螺旋式挤压机生产鲜湿面，对其生产工艺及其产品质量进行了探讨。     

Removal and recovery of lithium using various microorganisms

The accumulation of lithium by microorganisms was examined. Among the 70 strains of the 63 species tested (20 bacteria, 18 actinomycetes, 18 fungi, and 14 yeasts), a high lithium accumulating ability was exhibited by strains of the bacteria, Arthrobacter nicotianae and Brevibacterium helovolum. Lithium accumulation by A. nicotianae cells was strongly affected by the pH of the solution. The amount of accumulated lithium was maximum at pH 6. Cells immobilized with polyacrylamide gel also adsorbed lithium. They could be reused during repeated adsorptions, and adsorbed 548 micromol of lithium/g dry wt. cells. The adsorbed lithium was quantitatively and easily desorbed with 1 M hydrochloric acid using a column system.