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Volume 28 (1997 - 199･･･
- Issue 4 Pages 193-
- Issue 3 Pages 125-
- Issue 2 Pages 53-
- Issue 1 Pages 3-
Volume 28, Issue 3
Displaying 1-6 of 6 articles from this issue
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Verification of Receiving Process and Layout of Receiving HopperKiyokazu GOTO, Yoshihiro MIWA, Toshimitsu HATTORI1997 Volume 28 Issue 3 Pages 125-133
Published: December 25, 1997
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn the previous paper, the equations to obtain the operating rate of receiving section were established, and the effects of various receiving factors were considered. In this paper, selecting the four country elevators of single tank type or double tank type, the practical receiving processes were measured. The validity of the equations then could be verified. Using the measured results, the reasons why the operating rate is lowered were discussed. It became clear that difference in the time to confirm the end point of weighing or to change the next load among the facilities affects the operating rate.
Next, it was clarified that the layout of receiving hopper (passing style or U-turn style) gives no effect on the receiving process.View full abstractDownload PDF (983K) -
Jiao Yan LIU, Takayuki KOJIMA1997 Volume 28 Issue 3 Pages 135-142
Published: December 25, 1997
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSStrawberries (Euonymus americanus cv. Toyonoka) grown in Saga prefecture were harvested from November to April. Harvested product was transported and stored for three days under 0, 5, 10, 15 and 20°C temperatures, 80-95% relative humidity and vibration conditions of 0.5G for one hour.
The influence of these conditions on the respiration rate, mechanical properties, sugar content as Brix % and ascorbic acid (AsA) contents were measured.
The respiration rate increased with increased storage temperature while the Brix and AsA decreased significantly upon the application of vibration.
These influences could be held to a minimum by maintaining the storage temperature at 0°C.View full abstractDownload PDF (827K) -
Investigations on the suitable medium and conditions for the pollen cultureShun Rong REN, K. INTABON, Zhen Ya ZHANG, T. MAEKAWA1997 Volume 28 Issue 3 Pages 143-148
Published: December 25, 1997
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSPollen tube cultivated in vitro is considered to be a simple and useful method qualifying the maturity and quality of composts. However, necessary works to be done previously are to determine the suitable conditions of concen-trations of agar, sucrose and boron, as well as pH values, temperatures and culture times for each kind of the pollen used.
The obtained results of the experiments on the Lycopersion esculentum Mill., Cucurbita moschata Duch, Zea Mays L., Solanum melongena L., and Stewartia pseudo-Camellia Maxim. showed as follows:
1) The suitable concentrations of agar and sucrose for the pollen culture of the Solanum melongena L. and Stewartia pseudo-Camellia Maxim. were 0.8% and 10.0%, respectively.
2) The suitable pH levels were 6.0-6.5 and 6.5-7.0 for the Solanum and the Camellia, respectively.
3) The suitable concentration range of boron for the Solanum was from 8 to 24ppm, the one for the Camellia was 4 to 16 ppm. Temperature of about 25°C to 30°Cwas enough for both pollen kinds, and the culture times were 16h. for the Solanum and 8h. for the Camellia.View full abstractDownload PDF (690K) -
Changes of pollen tubes cultured on media enriched with compost water extracts of different maturityShun Rong REN, K. INTABON, Zhen Ya ZHANG, T. MAEKAWA1997 Volume 28 Issue 3 Pages 149-153
Published: December 25, 1997
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSAn effective method obtained from compost water extracts was to incubate compost solution at 60°C in water bath for about 3 hrs and to centrifuge to get supernatant as final compost extract. Pollen tubes of Solanum melongena L. increased their length with the increase of dilution rates of compost extracts enriched to their culture media. Compared with matured composts, contents of ammonia-N and volatile organic acids of un-matured compost were high. Extracts of un-matured compost depressed the elongation pollen tubes of both Solanum melongena L. and Stewartia pseudo-Camellia Maxim. as well as the rates of germination and elongation of roots of Brassica campestrics L.View full abstractDownload PDF (572K) -
Limi OKUSHIMA, Sadanori SASE, Atsuo IKEGUCHI1997 Volume 28 Issue 3 Pages 155-163
Published: December 25, 1997
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSInterpolating matrix method (IMM) is one of the finite difference methods applicable to arbitrary arrangement of mesh points. A computer code for three-dimensional incompressible turbulent flow has been developed and applied to the prediction of wind pressure coefficients on the surfaces of two types of single span greenhouses; spanr-oof type and curved-roof type. The accuracy of IMM was examined by comparing the wind pressure coefficients on the central vertical section with the wind tunnel experiments when the wind direction was perpendicular to the side wall. It was also compared with the traditional finite difference method with rectangular mesh system.
IMM predicted that the wind pressure coefficients for the vertical section on the span-roof type greenhouse were closer to the wind tunnel results than those in the traditional finite difference method with rectangular mesh system. However, IMM showed that the reverse flow near the leeward roof was still smaller as compared with the wind tunnel experiment.
For the curved-roof type greenhouse, IMM estimated that the wind pressure coefficients on the surfaces except the windward roof were closer to the wind tunnel experiments than those in the traditional finite difference method.View full abstractDownload PDF (2704K) -
Experimental approach for testing the practicabilityKazuyoshi SAITO, Takashi MIKI, Seiji HAYASHI1997 Volume 28 Issue 3 Pages 165-173
Published: December 25, 1997
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn this paper, we studied the practical usefulness of the NMR-based non-destructive testing method for watermelon. So far, in some experiments, it has been shown that void detection and sugar content measurement are possible in principle using the NMR technique. However, in those experiment, the samples were fixed during measurement. Therefore the practical usefulness of this method has not been proved yet.
In this study, to show the practicability of the NMR method, samples were carried by a conveyer during measurement.
In the void detection experiment, samples were moving at 350mm/s. NMR signal intensity from moving sample was reduced about 30% comparing to fixed sample. However, the same accuracy was obtained for both the fixed measurement and the carrying measurement.
For sugar content measurement, to know the most suitable measurement position, we investigated the distribution of sugar content in some samples before investigating the possibility of measuring sugar content with the conveyer. We obtained a result showing that the center is the most appropriate position. After the investigation, we measured NMR relaxation time of samples. In the measurement we stopped the samples 6 seconds at the magnet center. Then we analyzed the relation between sugar content and NMR relaxation time of the center of samples, and made a calibration equation.
The SEP and the BIAS of the calibration equation was 0.49 Brix% and 0.02 Brix% respectively. This result suggested that the NMR relaxation time a was good parameter to predict the sugar content of watermelon.
In conclusion, we have established the practicability of the NMR method for non-destructive testing of watermelon.View full abstractDownload PDF (4679K)
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