广州市纸张批发价

(S/324一99)规格批发价(元/令)njn︸n甘0勺J7j..1 f.二‘.五1 051400 Lan︺一口产曰门︺5尸a八七尸了心n︸‘787 x 2092毫米75了xz092毫米78了x Ic92毫米75了xlo92毫米了s了xzo92毫米787 x 1092毫米78了xxo92毫米了盯xl092毫米了8了义一。92毫米79了x工。‘,毫米丁只了x 10:〕2毫米了8了只1092毫米了8了xlooZ毫米78了xlo92毫米7R了x1092毫米78了xl092毫米了87义2092毫米了8不xlo92毫米了8了xlooZ毫米了8了xl。。2毫米了盯丫1092毫米丁8了x 2092毫米1 45n gUU口n︺n以进人t了八U 9.)一了山..1,.占J..五...二品种书写纸co克书写纸8。克书…     

基于 ANSOFT 的电动汽车用永磁无刷直流电机参数优选设计

本文阐述了计算优选法的方法和原理;确定了设计变量与计算参数 ; 建立了电机模型;增加了设计变量;创建了 Setup 与添加了计算参数 ; 优选计算了一组设计方案;选择了一款满足电动汽车用永磁无刷直流电机方案;提高了设计效率。     

激情飞扬谱华章 理性调整蓄强势——中国眼镜行业2007年盘点

中国眼镜涨价了．隐形眼镜筑底反弹了,专业技术培训火爆了,交流合作频繁了,公益活动升温了,明星推广风行了……     

自己动手,丰衣足食

忽然之间,通胀了。超市里,米贵了,面贵了,油贵了,连卷纸都在涨。菜场里,青菜贵了,海鲜贵了,各种肉也贵了。一时之间,贵气袭来,席卷了我们的生活。我们的收入没变,但是能够换来的实物越来越少了。     

食品科学的最新发展：分子物理美食学

食品科学的最新发展：分子物理美食学菜是否熟了，是嫩了还是老了？作料是否合适，多了还是少了？火大了还是小了？时间是长了还是短了？这些素来仅能凭我们的感官和经验来回答的问题如今科学家们已在作出精密的答案——这就是分子物理美食学。菜炒嫩了和炒老了凭肉眼是难...     

涨时代的机遇与挑战

让价格再飞一会 盘点2010白酒行业的关键词,“涨”字无疑是最热门的话题：方便面涨价了,鸡蛋涨价了,面粉涨价了,燃油涨价了,蔬菜涨价了,食用油涨价了,棉花涨价了,水电费涨价了……很多人不禁感慨：“除了工资,身边的一切都涨了!”     

学会活动动态

今年初,广东省纺织工程学会理事会在肇庆召开了第四届第二次理事会扩大会议,会上传达了厅局长会议精神,通报了纺织“八五”发展计划和2000年发展规划,强调了学会工作在振兴纺织工业中的重要作用,并从思想上、组织上加强了学会工作的领导,重新设置了学术部和科普部。随后,各部健全了组织领导,明确了分工,制定了活动计划。科普部制定了     

褪去“奢侈”面纱平板放量增长

经历了关键一年的培育,平板电视终于脱颖而出,褪去了“奢侈品”的面纱,逐渐走入寻常百姓家,平板电视在2005年得到了放量的增长,销量达到了188万台,与2004年同期相比增长了379.3%,销售额达到了239亿元,比2004年增长了292.7%。中国平板电视终于结束了漫长的导入期,进入了快速成长     

贯彻落实《公告》精神，稳步推进绿色印刷

今天开了一个很有成效的绿色印刷技术交流会,总署和环保部两位领导对《公告》作了深入的解析,使我们进一步提高了认识,明确了目标、掌握了政策、增强了信心、鼓舞了斗志。     

海盗大叔John Galliano遭遇Dior“解聘门”

关乎John Galliano,我也不得不八卦一下了,就算从不关注时尚圈的人也对他并不陌生吧。浪漫主义大师因为种族歧视言论遭老东家Dior解聘,让人咋舌。时尚界到底是怎么了,McQueen死了,Margiela隐退了,Slimane去搞摄影了,Gaultier也不在Hermes玩了,YSL去见马克思了,Valentino回家享清福了,现在John Galliano也出事了……     

Sensitivity of Methods of Variance Component Estimation to Culling Type of Selection

Two pseudoexpectation methods of variance component estimation were examined for selection bias from culling and were compared with Henderson's simple method and restricted maximum likelihood. Milk yield data were simulated for 100 herds, 50 sires, and approximately 2000 cows per replicate. Heritability was .25, and repeatability was .50. Each cow had two records. Twenty replicates were made. Two data sets were created; one was unselected and included both records of the cow, and the second excluded second records of cows with first records below the herd mean. Sire, cow, and error variances were estimated according to a mixed model that included fixed herd, parity, and random sire, cow, and error effects. Estimates of sire, cow, and error variances and heritability and repeatability were unbiased and were similar for all methods for unselected data. For selected data, sire and cow variances were overestimated and error variances were underestimated with Henderson's simple method and the pseudoexpectation methods. Accordingly, heritabilities and repeatabilities were overestimated. Biases were greatest for Henderson's simple method and differences between the two pseudoexpectation methods were small. With restricted maximum likelihood, sire variances were unbiased but error variances were slightly overestimated and cow variances underestimated. Use of restricted maximum likelihood is preferred with selected data.     

水性聚氨酯涂饰剂的性能分析

对几种水性聚氨酯涂饰剂的性能进行了多方面的测定分析,包括聚氨酯涂饰剂的含固量和pH值、聚氨酯涂饰剂膜的感观和机械性能、聚氨酯涂饰剂运用于涂饰中时涂层的性能。通过测定分析了解了这些聚氨酯涂饰剂的优缺点,以及它们用于皮革涂饰工艺中时所适用的涂饰种类。     

乳酸菌类细菌素的研究进展

对乳酸菌进行了简要分类，然后按乳酸菌产生的细菌素的结构组成特点进行了分类，对不同类型的乳酸菌细菌素的组成特点和功能特点进行了简要介绍。此外，对其合成过程及其产生抗菌活性的可能机理进行了描述，在此基础上，对影响乳酸菌类细菌素抗菌作用效果的外界因素和内部环境条件进行了详细分析。最后，论述了目前乳酸菌类细菌素在食品中的应用现状，对其在食品行业中的应用前景进行了探讨和预测。     

3 种香型凤凰单丛茶挥发性成分分析

采用溶剂辅助风味蒸发法提取玉兰香、蜜兰香和桂花香3 种香型凤凰单丛茶的挥发性成分,运用气相色谱-质谱（gas chromatography-mass spectrometry,GC-MS）联用技术结合气相色谱-嗅辨（gas chromatography-olfactometry,GC-O）技术分析其香气组分。通过GC-MS在3?种单丛茶中共检测出91?种挥发性成分,共有成分38?种,各茶样均以醇类、酮类和碳氢化合物为主,但各香型间仍有明显差异。通过GC-O分析共嗅闻出31?种活性香气成分,鉴定出30?种,其主要香气类型表现为花香、甜香、清香、果香。芳樟醇氧化物I、橙花醇、芳樟醇氧化物II和橙花叔醇4?种成分在3?种单丛茶中相对含量丰富,嗅闻强度值高,且呈现出愉快的花香、花香甜香、花香蜜香、清香果香的香气特征,对凤凰单丛茶香气品质形成有重要作用。     

高底物浓度玉米蛋白的双酶复合水解效果研究

利用碱性蛋白酶(Alcalase)、风味蛋白酶(Flavourzyme)和复合蛋白酶(Protamex)对高底物浓度(135g/L)玉米蛋白进行双酶复合水解,研究复合水解对水解物的水解度、可溶性蛋白质含量和抗氧化活性的影响,并对双酶酶解效果较好的酶解液进行了分子量分布测定。结果表明,Flavourzyme和Alcalase、Flavourzyme和Protamex、Protamex和Alcalase顺次水解玉米黄粉,总水解度分别为27.11%、26.95%和19.76%,可溶性蛋白质含量分别为50.33、40.32、48.85mg/ml,抗氧化活性分别为634.35、576.79和593.21 U/ml。多肽分子量主要分布在5 801.170～238.962u,与单酶水解相比均有显著提高。     

Relationships between characteristics of herd of bull-dams and predicting transmitting ability of young bull

Young bulls selected from Michigan herds for sampling by Select Sires Incorporated from 1975 to 1982 were identified. Data for herds from which young bulls were selected for year of young bull's birth were acquired from the Michigan DHIA. Herd average milk production, intraherd standard deviation for milk production, coefficient of variation for milk production, average sire transmitting ability of cows in the herd, and intraherd standard deviation of sire transmitting ability were computed for each herd. These herd characteristics were used in prediction of young bull transmitting ability. When considered along with a pedigree index predictor, intraherd standard deviation for milk production was significant in prediction of young bull transmitting ability, but other herd characteristics were not. Young bulls were grouped by the intraherd milk variance of the herd from which they were selected. Evaluations based on progeny tests showed young bulls selected from herds with low intraherd milk variance were genetically superior to those selected from herds with high intraherd milk variance. Predicted transmitting abilities for young bulls selected from low variance herds were less biased, but predicted transmitting abilities for those selected from high variance herds were inflated. However, the variance of biasedness was slightly lower in higher variance herds.     

Microflora of date fruits and production of aflatoxins at various stages of maturation

Twenty-five varieties of dates (Phoenix dactylifera) were examined at different maturation stages for total microbial counts, aflatoxins and aflatoxigenic Aspergillus sp. and lactic acid bacteria. The samples were examined as fresh and under simulated storage condition of high humidity. Microbial counts were high at the first stage of maturation (Kimri) and increased sharply at the second stage (Rutab), then decrease significantly at the final dried stage of maturation (Tamr). Aflatoxins were detected in 12% of the samples although aflatoxigenic Aspergillus were detected in 40% of the varieties examined, all at Kimri stage only. Lactic acid bacteria were present only at the Rutab stage in some varieties including all varieties in which aflatoxins or aflatoxigenic Aspergillus were detected. No aflatoxins or aflatoxigenic Aspergillus were detected at the final edible stage of maturation.     

Effects of changing housing on physiology of calves

Holstein bull calves were assigned to be reared in either a stall until 47 d of age, then moved to a hutch; a hutch until 47 d, then moved to a stall; or an elevated pen. Jugular blood samples were obtained at 42, 49, and 56 d of age. Two trials were run during the fall of successive years with 5 to 7 calves per treatment per trial. Stalls were .56 X 1.2 m with elevated wooden slotted floors. Pens were 1.2 X 1.5 m with elevated wooden slotted floors and were located in the same open front building as the stalls. Hutches were 1.2 X 1.2 X 2.4 m long, and calves were restrained with a collar and 2.4-m chain. Calves were placed on treatment between 12 to 24 h after parturition. A treatment by day interaction for triiodothyronine, thyroxine, and adrenocorticotrophic hormone-induced cortisol release indicated that conditions responsible for treatment effects were largely reversed 9 d after moving from stalls to hutches or hutches to stalls.     

牛奶中抗生素残留检测方法的研究现状

综述了抗生素残留的来源、危害，以及检测抗生素残留的各种方法，包括微生物检测法、理化检验法、免疫法等，指出应用免疫法快速检测试剂盒或生物传感器是今后抗生素残留控制与监督的发展方向．     

超滤压力对膨化玉米蛋白粉酶解产物性质的影响

采用Alcalase和Protamex蛋白酶对膨化后的玉米蛋白粉进行分步水解,将得到的水解液于室温条件下进行超滤。研究了超滤压力对不同分子量分布的产物性质的影响。结果表明,超滤压力对产物的体积得率、蛋白得率、起泡性及泡沫稳定性和抗氧化活性影响较大,而对黏度、乳化性及乳化稳定性的影响不大。超滤压力在0.08MPa时,各超滤分级产物的功能特性和抗氧化活性都较好。在该压力下,分子量≤6kDa的产物体积得率最大;分子量在6～10kDa和分子量≥20kDa的产物蛋白得率均在18%左右;随着分子量的增大,产物的黏度都在1.2～1.9mPa·s之间,起泡性在148%～207%之间,但是泡沫稳定性较差;分子量≥20kDa的产物乳化性最高,达到45.71,超滤分级产物的乳化稳定性无明显变化;分子量≤6kDa的产物抗氧化活性最高。