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( Michiru Suzuki ),( Mitsuhiko Katahira ),( Motoyasu Natsuga ) 한국농업기계학회 2014 바이오시스템공학 Vol.39 No.4
Purpose: We estimated the dietary qualities of green soybean (edamame) by using a specialized NIR transmission spectrometer to determine the constitutive properties of the soybean, such as the sucrose content and ninhydrine reaction quantity (NRQ; defined by the ninhydrine reaction, which has a high positive correlation with the total free amino acids), with the purpose of establishing a quality assurance system. Methods: We used a newly developed spectrometer probe that enables in situ estimation of the constituents of the soybean. Results: The calibration results obtained using a wavelength range of 760-960 nm were characterized by R2 = 0.57 and standard error of cross-validation (SECV) of 0.78% for sucrose, and R2 = 0.59 and SECV = 0.35% for NRQ. Conclusions: These results are inferior to those of our previous study obtained using a specialized bench-type transmission spectrometer. The poorer results are attributed to several possible reasons, including the effect of direct sunlight and the unstable sample presentation. We plan to conduct further study using improved optical layout and sample presentation.
Suzuki, Michiru,Katahira, Mitsuhiko,Natsuga, Motoyasu Korean Society for Agricultural Machinery 2014 바이오시스템공학 Vol.39 No.4
Purpose: We estimated the dietary qualities of green soybean (edamame) by using a specialized NIR transmission spectrometer to determine the constitutive properties of the soybean, such as the sucrose content and ninhydrine reaction quantity (NRQ; defined by the ninhydrine reaction, which has a high positive correlation with the total free amino acids), with the purpose of establishing a quality assurance system. Methods: We used a newly developed spectrometer probe that enables in situ estimation of the constituents of the soybean. Results: The calibration results obtained using a wavelength range of 760-960 nm were characterized by $R^2$ = 0.57 and standard error of cross-validation (SECV) of 0.78% for sucrose, and $R^2$ = 0.59 and SECV = 0.35% for NRQ. Conclusions: These results are inferior to those of our previous study obtained using a specialized bench-type transmission spectrometer. The poorer results are attributed to several possible reasons, including the effect of direct sunlight and the unstable sample presentation. We plan to conduct further study using improved optical layout and sample presentation.
( Maki Maebashi ),( Motoyasu Natsuga ),( Hiroaki Egashira ),( Nobuo Ura ),( Mitsuhiko Katahira ) 한국농업기계학회 2012 바이오시스템공학 Vol.37 No.6
Purpose: Green soybeans (edamame) are now an economically important and popular food product in Japan. In order to shorten breeding time and to decide an optimal harvest time, we have been developing a dedicated NIRT spectrometer since 2004 for the determination of constituent content such as sucrose and free amino acids, which are two major contributors to the eating quality, in a single pod green soybean. Methods: The obtained models showed that the developed NIRT instrument had reasonable accuracy for the determination of these two components. Then we carried out the investigation into the change in two components during a few days storage using these models with changing time, variety/cultivar, packaging and temperature. Results: The result showed that the most affecting factor on decreasing both sucrose content and free amino acids was variety /cultivar. The time, packaging and temperature also affected significantly in most cases.
Maebashi, Maki,Natsuga, Motoyasu,Egashira, Hiroaki,Ura, Nobuo,Katahira, Mitsuhiko Korean Society for Agricultural Machinery 2012 바이오시스템공학 Vol.37 No.6
Purpose: Green soybeans (edamame) are now an economically important and popular food product in Japan. In order to shorten breeding time and to decide an optimal harvest time, we have been developing a dedicated NIRT spectrometer since 2004 for the determination of constituent content such as sucrose and free amino acids, which are two major contributors to the eating quality, in a single pod green soybean. Methods: The obtained models showed that the developed NIRT instrument had reasonable accuracy for the determination of these two components. Then we carried out the investigation into the change in two components during a few days storage using these models with changing time, variety/cultivar, packaging and temperature. Results: The result showed that the most affecting factor on decreasing both sucrose content and free amino acids was variety/cultivar. The time, packaging and temperature also affected significantly in most cases.
( Masanori Saito ),( Motomu Honjo ),( Hayato Shindo ),( Satoru Takeda ),( Sho Murakami ),( Mitsuhiko Katahira ),( Jun-ichi Takeda ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
A cultivation outline of green soybeans could not set mechanical seeding technics to have difference of mulched soil temperature at any seeding season. Especially, the early cropping type of green soybeans seeding that used mulcting method to get high emergence rate on low temperature season have been high labor load to seed by manual operation. Therefore, the purpose of this study was to develop high efficiency and precision mechanical seeding technique which have ridging and mulching same time. We developed prototype seeding machine combined with up-cut rotary, mulching seeder and the molding implement. After that, we made control device to move diching device for up and down direction. We investigated the seeding accuracy and seeding depth of the prototype seeder, and evaluated the growth and yield, respectively. As a result, it is showed that the seeding accuracy is as same as manual seeding. Although the seeding depth was shallow compared to the conventional manual seeding, it can increase seeding depth than conventional seeding. However, the measured seeding depths were shallower than the set values. This is reason why was influenced of soil compression, posture of the seeding part and covered soil after seeding. The plant length at harvest time might become longer as the seeding depth got deeper. So, we considered that it is possible to do multiple simultaneous work used up-cut ridging and mulching seeder.