Not AvailablePigeonpea (Cajanas cajan) is one of the important pulse crops of India, contributing about 20% to the total production of all pulses. It accounts for 90% of the total world production of pigeonpea. Cleaned and graded lots of... more
Not AvailablePigeonpea (Cajanas cajan) is one of the important pulse crops of India, contributing about 20% to the total production of all pulses. It accounts for 90% of the total world production of pigeonpea. Cleaned and graded lots of pigeonpea cv. P-992 were selected for the study. Two pre-milling methods were undertaken for the study namely; hydrothermal and heat treatment. Steam pressure and residence time for the hydrothermal treatment were taken as independent variables. Three levels of each, steam pressure (0.5, 1, 1.5 kg/cm2) and residence time (5, 10, 15 min) were taken for hydrothermal treatment method. Under heat treatment, temperature and treatment duration, each of four levels was taken as independent variables. Heat treatment was conducted for temperature: 65, 85, 105, 125 0C and duration: 2,4,6,8 min. Both the treatments had shown significant effect on milling performance. Under hydrothermal treatment, steam pressure 0.5 kg/cm2 for 10 min yielded maximum hulling efficiency; 84.527 % and finished product recovery; 52.07 %. However, among all the heat treatment under the study, temperature 85± 50C for 4 min resulted to the maximum hulling efficiency 84.28 % and finished product recovery; 53.53%. On the basis of the above observations, hydrothermal treatment at 0.5 kg/cm2 for 10 minute is recommended for resource full farmers and for resource poor farmer’s heat treatment at 85± 5 0C for 4 min. Optimized treatments trials on IARI Mini Dal mill successfully yielded finished product recovery of 72.83 % and hulling efficiency: 90.47% with pre-milling heat treatment at 85 0C for 4 minute. The hydrothermal treated lot resulted finished product recovery: 74.96% and milling efficiency: 90.77 %. Further increase of product recovery and dehulling efficiency was observed with scouring the kernel before treatment. Cost of processing was found to be 1.25 Rs./kg and 1.60 Rs./kg for heat and hydrothermal pre-milling treatment and milling by IARI Mini Dal Mill, respectively.ICAR JRF 2011-1
Not AvailablePigeonpea (Cajanas cajan) is one of the important pulse crops of India, contributing about 20% to the total production of all pulses. It accounts for 90% of the total world production of pigeonpea. Cleaned and graded lots of... more
Not AvailablePigeonpea (Cajanas cajan) is one of the important pulse crops of India, contributing about 20% to the total production of all pulses. It accounts for 90% of the total world production of pigeonpea. Cleaned and graded lots of pigeonpea cv. P-992 were selected for the study. Two pre-milling methods were undertaken for the study namely; hydrothermal and heat treatment. Steam pressure and residence time for the hydrothermal treatment were taken as independent variables. Three levels of each, steam pressure (0.5, 1, 1.5 kg/cm2) and residence time (5, 10, 15 min) were taken for hydrothermal treatment method. Under heat treatment, temperature and treatment duration, each of four levels was taken as independent variables. Heat treatment was conducted for temperature: 65, 85, 105, 125 0C and duration: 2,4,6,8 min. Both the treatments had shown significant effect on milling performance. Under hydrothermal treatment, steam pressure 0.5 kg/cm2 for 10 min yielded maximum hulling efficiency; 84.527 % and finished product recovery; 52.07 %. However, among all the heat treatment under the study, temperature 85± 50C for 4 min resulted to the maximum hulling efficiency 84.28 % and finished product recovery; 53.53%. On the basis of the above observations, hydrothermal treatment at 0.5 kg/cm2 for 10 minute is recommended for resource full farmers and for resource poor farmer’s heat treatment at 85± 5 0C for 4 min. Optimized treatments trials on IARI Mini Dal mill successfully yielded finished product recovery of 72.83 % and hulling efficiency: 90.47% with pre-milling heat treatment at 85 0C for 4 minute. The hydrothermal treated lot resulted finished product recovery: 74.96% and milling efficiency: 90.77 %. Further increase of product recovery and dehulling efficiency was observed with scouring the kernel before treatment. Cost of processing was found to be 1.25 Rs./kg and 1.60 Rs./kg for heat and hydrothermal pre-milling treatment and milling by IARI Mini Dal Mill, respectively.ICAR JRF 2011-1
Seed moisture content is significant in the handling, storage and processing of seeds. This study was carried out to determine the physical properties of green gram seeds as function of seed moisture content in the moisture range of 6-24%... more
Seed moisture content is significant in the handling, storage and processing of seeds. This study was carried out to determine the physical properties of green gram seeds as function of seed moisture content in the moisture range of 6-24% dry basis (d.b). The average length, width, thickness, geometric mean diameter, thousand grain mass, angle of repose and water activity increase as the moisture content increased from 6 to 24% (d.b) and the sphericity was found to decrease from 0.928 to 0.625. Also bulk density was found to decrease from 1096 to 913.34 kg m-3 , whereas true density decreased from 1369.5 to 1237 kg m-3 , while the porosity was found to increase from 18.09 to 30.73%. The static coefficient of friction of green gram increased against various surfaces such as, wood, glass, GI sheet and mild steel sheet, as the moisture content increased from 6 to 24% (db.).