An introduction to rice-grain technology by K. R. Bhattacharya, Syed Zakiuddin Ali

By K. R. Bhattacharya, Syed Zakiuddin Ali

This e-book offers the essence of the speculation and perform of drying, garage, milling, getting old, parboiling, products-making, and byproducts utilisation of rice in an easy, unencumbered sort that's available even to the lay individual. The e-book may be of price to the managers and operators of the hundreds of thousands of rice generators strewn everywhere in the Rice kingdom. it may even be welcome to scholars of meals know-how for his or her first publicity to the topic, and to the lay person.

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Heating air to raise its temperature by 11°C leads to halving its RH. Thus if air with 90% RH and 25°C is heated to 36°C, then its RH is lowered to 45%. Heating thus automatically reduces the RH of the air and increases its ability to absorb moisture. This is precisely the reason we hang out washed laundry on a clothes line in the sun rather than in shade if the sun is shining. Air temperature also plays a second role. It helps in actual evaporation. Evaporation of moisture requires supply of energy (latent heat).

For example, when paddy is undergoing drying, its moisture content changes all the time. Now if the moisture is determined at two points of time, then the amount of change that occurred between these two points cannot be easily understood if the two moisture values are expressed on wet basis. For example, if paddy at 20% moisture (wet basis) is dried to 15% moisture (wet basis), then the loss © 2015 by Woodhead Publishing India Pvt. Ltd. 40 An introduction to rice-grain technology in weight cannot be calculated as 5%.

In the first decade of the 2000s, this share rose to 81%. The expansion of global rice trade from 1980 onwards has been mainly due to increased exports from Thailand, Vietnam, United States, Pakistan and China. Thailand, in fact has been consistently the highest contributor to international rice market, having a share of 25–35% up to about 2003. 4 million tonnes © 2015 by Woodhead Publishing India Pvt. Ltd. 4 million tonnes per year in the early 2000s, and surged further to 10 million tonnes in 2004, with a market share of 38%.

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