02890cas a2200241 a 450000500170000000800410001703500150005810000270007324500900010026000520019030000100024249000270025250001560027950200580043552018310049365000150232470000380233970000550237770000470243271000450247981000590252485600650258320260817163629.0110910s1985    th uu|m rtt   0|  a1eng d  a.b100991161 aSantha, Calista Rohini10aAssessment of primary production limitation in fish ponds using algal tissue nutrient  aBangkok :bAsian Institute of Technology,c1986  a75 p.1 aThesis ;vno. AE-85-30  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development  aThesis (M.Eng.) - Asian Institute of Technology, 1986  aMoisture adsorption by paddy results in the formation of fissures  leading to a reduction in its head rice yield. In this study, the  moisture adsorption characteristics of paddy as affected by initial  moisture content (IMC), air temperature (T) a nd relative humidity (RH),  and the exposure duration(t) Here determined in order to quantify the  reduction in head rice yields during rewetting.  Experimental test conditions Here in the following ranges :  Paddy initial moisture content, B-15 % Net basis ; air temperature,  20-40°C; air relative humidity, 60-90%; and exposure time, 0 . 5-24 h . A  controlled temperature and relative humidity cabinet Has used for  rewetting paddy samples Neighing 130 g and placed in Hire-mesh trays.  Paddy samples having moisture content more than 13 % Kb after rewetting  Here dried to 13 % Kb prior to milling. Samples having moisture content  less than 13 % Kb were milled as such.  Stepwise multiple regression analysis showed that moisture  adsorption in paddy Has affected by IMC, RH, t, T in decreasing order of  significance. TKO different approaches Here made to represent the  experimental moisture adsorption data. Both models Here found to be  adequate to represent the moisture adsorption characteristics of paddy.  Rewetting of paddy samples resulted in a reduction in head rice  yields , Which was expressed as a ratio of percentage head rice yield of  treated sample to that of control sample. Most of t he reduction in  head rice yields occurred during the initial few hours of exposure. A  relationship between the head yield ratio and t he initial moisture  contents of paddy Ha s developed by taking into account the relative  contributions of RH, t and T. Such a relationship could be used to  quantify the reduction in head rice yields due to moisture adsorption. 0aFish ponds1 aJindal, Vinod Kumar,eChairperson1 aIllangantileke, Sarath G., eExamination Committee1 aGupta, Chandra P., eExamination Committee2 aGovernment of Japan., eScholaship Donor2 aAsian Institute of Technology.tThesis ;vno. AE-85-30  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B19576