Environmental Factors Which Cause Heat Damaged Rice Grain in Silo and Their Mechanisms

造成筒仓米粒热损的环境因素及其机理

基本信息

  • 批准号:
    09660282
  • 负责人:
  • 金额:
    $ 2.24万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    1997
  • 资助国家:
    日本
  • 起止时间:
    1997 至 1998
  • 项目状态:
    已结题

项目摘要

Rice grain is a living thing which germinates and metabolizes actively if the environmental factors meet with. Physically speaking, bulk grain can be looked upon as a thermal insulator. Simple cylindrical bins composed by a single layer steel panel in which the stored grain acts as a thermal insulator have been popularized recently. These bins easily cause heat damaged rice grain if they were used carelessly under a normal circumstances and climates. Heat damaged rice is defined as the rice fermented by accidents. It has an odour like compost when it were still wet and fresh, and inedible. The external color of the heat damaged brown rice changed to dark brownish, and of milled rice, varies from brown to pink.The mechanisms causing heat damaged rice are ; (1) Formation of hot or wet spot in a silo. It may be by leakage of rain water, or condensation of dew at the inner side of the bin. Condensation occures in the layer and the surface of bulk. (2) Small animals as rats and insects can … More be heat sources. (3) Growth of microorganisms spreads in and surroundings of the hot spot. (4) Very low thermal conductivity of grain does not disperse the heat generated in the spot. (4) The spot becomes hotter and wetter causing the germination of the grain. Also the growth of microorganisms such as mold spreads. (5) Heat and water from the hot spots, and metabolism of living things cause a vicious cycle of in silo fermentatuion damage. (6) Thus the hot spots lead the fermentation in silo and as the results, fermentated or heat damaged rice will be formed.Generally speaking, the technical control points are already announced repeatedly. The most important skill is the control of temperature and water (of air and grain). Operator should control storage system by watching grain temperature to find the formation of hot spot . and if it occures, quick rotation should be applied. Pevention of water leakage and of rain drop are also important.Fermantation damage occures both in cold areas and in hot- humid areas, but in different styles. Less
水稻籽粒是一种在环境因素作用下萌发、代谢活跃的生物。从物理上讲,散装谷物可以被视为绝热材料。由单层钢板组成的简单圆柱形储料箱,其中储存的颗粒起到隔热的作用,最近已经流行起来。这些垃圾桶在正常的环境和气候下使用时,如果不小心使用,很容易造成米粒受热损坏。热损大米定义为意外发酵的大米。当它还是湿的、新鲜的、不能食用的时候,它有一种堆肥的气味。热害糙米和精米的外观颜色从棕色到粉红色不同。引起热害大米的机制是:(1)筒仓内形成热斑或湿斑。它可能是由于雨水的泄漏,或露水凝结在垃圾桶的内侧。凝结发生在块体的层和表面。(2)小动物如老鼠和昆虫可以…更多的是热源。(3)微生物在热区内及周围扩散。(4)粮食的导热系数很低,不能分散现场产生的热量。(4)斑点变热变湿,导致籽粒萌发。还有微生物的生长,如霉菌的传播。(5)热区的热、水和生物的新陈代谢,造成仓内发酵破坏的恶性循环。(6)热点引导筒仓发酵,形成发酵或热损大米。一般而言,技术控制点已反复公布。最重要的技能是控制温度和水分(空气和粮食)。操作员应通过观察粮温来控制仓储系统,以发现热点的形成。如果发生这种情况,应该应用快速旋转。渗漏和雨滴的防治也很重要,寒冷地区和湿热地区都会发生积水破坏,但形式不同。较少

项目成果

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MORISHIMA Hiroshi其他文献

MORISHIMA Hiroshi的其他文献

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{{ truncateString('MORISHIMA Hiroshi', 18)}}的其他基金

Storage Life and Taste of Rice Unusually Long Term Stored at a Low Temperature
低温长期保存大米的保存期限和口感
  • 批准号:
    07660350
  • 财政年份:
    1995
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
A Control System of the Storage for Fresh Commdities by Means of the Combination of a Packet Radio and an Expert System
分组无线与专家系统相结合的生鲜商品仓储控制系统
  • 批准号:
    01560274
  • 财政年份:
    1989
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Studies on the Methods to Maintain the Freshness of Horticultural Commodities under the Dynamic Change of Environment
环境动态变化下园艺商品保鲜方法研究
  • 批准号:
    63304021
  • 财政年份:
    1988
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Grant-in-Aid for Co-operative Research (A)
Accuracy Testing and Evaluation System of Image Data Processing Sizer and Electronic Weight Sizer.
图像数据处理秤和电子重量秤精度测试与评估系统。
  • 批准号:
    61560276
  • 财政年份:
    1986
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
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