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akangln

木虫 (著名写手)

[交流] 【请教】请教:什么是“well-defined flow”

请学化工的朋友帮忙看一下这篇文章的摘要,我的问题是:“什么是well-defined flow”,敬请指教。

Title: Creating novel structures in food materials: The role of well-defined shear flow
  
Author(s): Goot, A.J. van der; Peighambardoust, S.H.; Akkermans, C.; Manski, J.M.
Source: Food Biophysics 3 (2008)2. - ISSN 1557-1858 - p. 120 - 125.


Abstract: Structure formation in food materials is influenced by the ingredient properties and processing conditions. Until now, small structural elements, such as fibrils and crystals, have been formed using self-assembly, while processing was applied to create relatively large structures. The effect of self-assembly under flow is rarely studied for food materials, but it is widely studied for non-food systems. The use of well-defined flow, often simple shear, turned out to be essential to study and control the structure formation process in foods as well. This observation encouraged us to develop a number of different shearing devices that allowed processing of biopolymer systems under simple shear flow. This paper reviews our main findings. In the case of protein fibrillization, the shear rate was found to control the growth rate as well as the properties of the fibrils formed. In the case of dough processing, simple shear flow made the product more process tolerant and induced gluten migration. The use of shear flow for dense caseinate dispersions led to hierarchically structured and fibrous material. Based on the presented results, we conclude that introducing simple shear flow in food structuring processes can lead to a much broader range of structures, thereby better utilizing the full potential of food ingredients.
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shawcx

木虫 (小有名气)

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akangln(金币+2,VIP+0):谢谢! 5-4 17:12
akangln(金币+2,VIP+0): 5-25 10:40
字面意思是“定义明确的”,我感觉应该是“研究的比较清楚的”,“已有明确定论的”的意思。
3楼2009-05-04 13:04:36
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有点甜

金虫 (小有名气)

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akangln(金币+2,VIP+0):谢谢! 5-4 17:12
akangln(金币+2,VIP+0): 5-25 10:40
在这应该是个虚词  
well-defined   
有明显边界的(0)界线分明的(0)界限清楚的(0)轮廓分明的(0)界限分明的(0)清(0)意义明确的(0)已定义过的(0)
应该意思就是剪切流体的作用
2楼2009-05-04 12:29:16
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liubencai

木虫之王 (文坛精英)

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guoj5292(金币+1,VIP+0):鼓励交流,欢迎常来化工版 5-4 22:06
akangln(金币+2,VIP+0): 5-25 10:40
定义明确的, 定义完善的, 明确的
坚持到底
4楼2009-05-04 18:30:09
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akangln

木虫 (著名写手)

同志们能否给一些专业解释,或给出一些中文的专业参考文献,让俺学习一下。
5楼2009-05-05 08:02:45
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