A REVIEW OF FUNDAMENTAL AND ENGINEERING ASPECTS OF EXTRUSION OF BIOPOLYMERS IN A SINGLE-SCREW EXTRUDER

A review of fundamental and engineering aspects of extrusion in a single-screw is given. Attention is focussed on flow patterns, flow rates, residence time distributions and power consumption as a function of extruder design and screw rotation speed. The relationship for these engineering variables in extrusion of a purely Newtonian liquid and a power law liquid are reviewed. Where possible these relationships are compared with experimental results from the literature (corn-grits) and with our own measurements on biopolymers (corn-grits, defatted soy flour, modified di-amylopectin).     

一类线性算子的本征值的一个特性

本文讨论了一类线性算子的本征值相应的投影算于的特性,给出了这类线性算子的本征向量空间与投影空间之间的关系及其维数特性。     

刘翔,飞跃时尚

栏间，他在飞翔；栏下，他在成长。走过了23个年头已告别青涩的刘翔，举手投足间的成熟，流露着不经意的酷。那么，在世界110米跨栏史上树起一块新的丰碑的他，对时尚经的理解又会是怎样的呢？     

爱心风尚

有很多艺术家愿意为公益事业奉献爱心．因此慈善的形式也开始变得时尚起来。[编者按]     

一场简约主义的聚会

在这个乍暖还寒的季节，极简风依旧盛行。挑逗的色彩开始蠢蠢欲动，典雅的橱窗把极简美学演绎的异常痴醉，干练的时装被精致的表象匀染的简约独到。把这柔声细语的浪漫，在传递给路人时娓娓道来，寂静之处更显奢靡的华美。     

南国的一倾天空

创业伊始 在中国服装产业中，深圳服装业的繁荣和众多具有活力的品牌形象，在人们的脑海中形成了具有跳跃性的动感音符，而为这首动听的“产业进行曲”谱曲的作者，就是深圳服装协会的秘书长沈永芳女士，多少年来，沈永芳辛苦地忙碌着，用她充满热情的敬业精神和超强的能力，助推着深圳服装业的发展。     

A SURVEY OF MICROBIOLOGICAL ASPECTS OF CIDER MAKING

Among the lactic microflora of ciders it was found that the species Leuconostoc oenos was predominant at the end of the alcoholic fermentation as well as at the end of the malo-lactic conversion. Among yeasts, the genera Saccharomyces was predominant at the end of fermentation. However, in the case of one juice characterised by a low initial level of bacteria, a high amount of phenolic compounds and a small quantity of total nitrogen, the whole lactic flora was no longer detected after a fortnight.     

语音报时系统的一种实现方法

采用 Ｔ Ｓ Ｐ５２２０ 语音合成器,结合微机技术设计了一种语音报时系统．其语音库由 Ｌ Ｐ Ｃ算法建立、由报时所需的３０ 多个单字组成,通过对单字发音子程序的调用来实现语音报时过程．该系统具有预定报时、请求报时和过程报时功能．     

OCCURRENCE OF A KILLER STRAIN OF SACCHAROMYCES CEREVISIAE IN A BATCH FERMENTATION PLANT

A killer strain of Saccharomyces cerevisiae has been isolated from batch fermented beer which had attenuated poorly and possessed an unpleasant phenolic (clove-like) aroma.     

确定凸缘圆筒形拉深件拉深次数的新方法

从XPD-(120 90)-4洗衣机电机凸缘端盖的制造推出确定凸缘圆筒形拉深件拉深次数的新方法,以及利用拉深过程中毛坯的应力与应变状态的变化规律来决定拉深模中凸凹模尺寸的原则。     

TEXTURE OF BAKED BEANS - A COMPARISON OF SEVERAL METHODS OF MEASUREMENT

Objective techniques for measuring the textural characteristics of baked beans were compared with sensory analysis. The Kramer shear-compression cell, a back extrusion cell, the F. M. C. Pea Tenderometer, a plate extrusion cell and a wire extrusion cell were tested. The objective results were highly correlated with each other and with sensory ratings for hardness and cohesiveness. It was concluded that the selection of an objective test could, therefore, be based on practical considerations and the equipment at hand.