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Volume 27 (1996 - 199･･･
- Issue 4 Pages 195-
- Issue 3 Pages 111-
- Issue 2 Pages 47-
- Issue 1 Pages 3-
Volume 27, Issue 1
Displaying 1-3 of 3 articles from this issue
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Direct measurement of cohesiveness and properties of residual cooking liquid for indica and japonica ricesToshinori KIMURA, Naoto SHIMIZU, Shigeru YOSHIZAKI, Shin'ichi TANEYA1996 Volume 27 Issue 1 Pages 3-10
Published: June 25, 1996
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe object of this study is to establish measurement method of varietal difference in basic physico-chemical properties which relate to eating quality of rice. Direct measurements of cohesiveness of cooked rice, and the iodine blue value (IBV) and the total solid (TS) in residual cooking liquid were applied to indica and japonica cooked rices.
The results showed that quality indicator of IBV/TS makes it possible to evaluate qualitative change in starch fraction in residual cooking liquid, since the value of IBV/TS corresponded to amylose content in rice. Cohesiveness of cooked rice was found to be affected by property of starch fraction in residual cooking liquid, since cohesiveness of cooked rice correlated at r=-0.851 with IBV/TS.View full abstractDownload PDF (1004K) -
Yoshikazu SATO, Hisashi KOWATA, Hiroshi HATA, Hisashi YAMAZAKI1996 Volume 27 Issue 1 Pages 11-20
Published: June 25, 1996
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSA snow melting method using warm exhaust air from livestock buildings was developed. Results are summarized below:
1. Experiments were done at the two mechanical ventilated swine buildings in Takikawa city in the winter of 1990 to 1991. The inside air temperatures of the two buildings were about 20°C and 10°C, respectively. Exhaust air from the fans was led to ducts installed on the ground and discharged to snow on the eaves. The exhaust air melted enough of the snow on both buildings with the minimum ventilating rate in cold weather that there was no need to remove snow from the eaves.
2. The ducts made of concrete bricks used for discharging exhaust air showed a higher effective heat utilization ratio than that of polyethylene tubes and plastic drain pipes.
3. Based on experimental results, changes in the depth of snow accumulating on the eaves were estimated for the swine buildings in Iwamizawa city using a simulation of the snow melting method. Even if the inside air temperature was 10°C, there was little need to remove snow from the eaves of the buildings in a year of normal snow fall.
4. Additional experiments investigated the influence of air humidity on melting snow. Results demonstrated that air with higher relative humidity melted more snow.View full abstractDownload PDF (4360K) -
Development of Variance Prediction and Control System for Soil Water in GreenhouseXiao-Dong LIAN, Kazuhiro NAKANO, Yasuo OHTSUKA, Kazuhiro YUASA, Taro I ...1996 Volume 27 Issue 1 Pages 21-29
Published: June 25, 1996
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSTo predict the variance and control the soil water in greenhouses at optimal conditions, a personal computer-based automatic control system was designed with ceramic soil water sensors. This control system is easy to operate and has enough irrigation schedule flexibility at a relatively low cost, it was applied in the actual automatic irrigation for greenhouses. Through the results from these experiments, we came to the conclusions as below:
1. The pF values measured by the sensors were relatively reflective of the soil water conditions and there is no difference from conventional porous cup soil water sensor. If the time lag in the pF changes and saline accumulation are taken into account at measurements, this kind of sensor is sufficient for the soil water control in greenhouses.
2. The experiments on the real-time changes of the soil water pF values show that the irrigation water flow has no relationship with the changes in pF values at various layers of the soil. However, it was observed that at the irrigation water flows ranges in these experiments, the irrigation water quantities is very important for the changes of the pF values, moreover, to obtain a stable control for soil water, the sampling time must be taken some hours in the control system.
3. As a result of the soil water control experiments, we came to the conclusion that this system was capable of controlling soil water pF values according to the set-points. In this study, the calculation of the optimal irrigation water levels and the control of pF values within the optimal range were very effective for soil water control. Moreover, with the introduction of the feedforward control method in the soil water control, the controlled pF values of soil water were very close to the desired set-point.View full abstractDownload PDF (1075K)
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