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Volume 37 (2006)
- Issue 4 Pages 173-
- Issue 3 Pages 107-
- Issue 2 Pages 51-
- Issue 1 Pages 3-
Volume 37, Issue 4
Displaying 1-5 of 5 articles from this issue
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Yaohua HU, Takanori SUZUKI, Gou NOGUCHI, Yongyu LI, Yutaka KITAMURA, T ...2007 Volume 37 Issue 4 Pages 173-182
Published: March 25, 2007
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSPrincipal component analysis (PCA) was performed to study the relationship between carcass traits and pork quality characteristics and make a total evaluation of pigs. One hundred three-way crossbred pigs (LWD) were used in this study. All the carcass traits were assessed using objective measurements. Moreover, meat quality characteristics were pH, color, moisture, water-holding capacity, and intramuscular fat of longissimus thoracis. As a result, the first three principal components (PC) explained approximately 75% of total variables (n=10) for carcass traits and the first five PC can clarify 69% of the meat quality characteristics (n=14). The carcass and loin lengths define the first PC of carcass traits, and the loin eye area has greatly effects on the three principal components. The first two PC of meat quality are the meat color indexes and moisture, and intramuscular fat defines the third principal component. In conclusion, PCA has not only been proven to be a very effective method to obtain a synthetic judgment of meat quality and carcass traits but also it clarifies the order of important characteristics of carcass and pork quality.View full abstractDownload PDF (1219K) -
Takaaki MAEKAWA, Xiaohui LEI, Haruyuki FUJIMAKI, Wei BAI2007 Volume 37 Issue 4 Pages 183-192
Published: March 25, 2007
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSMany studies have confirmed the efficiency of soil trench systems; however, few have systematically studied the distributions of soil temperature, moisture content, and nitrogen in the profile of a soil trench system. In this study, the nitrogen removal in a soil trench system located in Sasagi (Tsukuba, Ibaraki, Japan) was evaluated by incorporating temperature and soil moisture content profile measurements.
The results revealed that despite relatively small fluctuations, the soil temperatures at the top layer of soil (depth of 10cm) were greatly affected by air temperature; in comparison, the air temperature had little effect on the soil temperatures of soil layers at deep depth. A similar result was also obtained for soil moisture content, which was mainly affected by precipitation, evapotranspiration, etc.
An investigation of the nitrogen distributions revealed a pattern similar to that obtained from the results of a previous simulation. Ammonia can be almost completely removed by using the soil trench system; however, some nitrates still remain in the effluent due to incomplete denitrification that might be caused by an insufficient carbon source.View full abstractDownload PDF (2497K) -
Satoshi MINAKUCHI, Hisashi WATANABE, Tetsuro KAWASAKI2007 Volume 37 Issue 4 Pages 193-198
Published: March 25, 2007
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe vase life of carnation opened by Bud Anthesis Acceleration (BAA) treatment was shorter than intact carnation (Minakuchi et al. 2004). To investigate effects of light-dark cycle in BAA on the number of days to fully opening and qualities of the carnations, the carnations (Dianthus caryophyllus L., cv. Nora) were cut at stage 1, bud diameter of 15mm, and treated with BAA solution containing 3% sucrose at 25°C. The bud cut carnations were exposed to different light-dark cycle, continuous light; 12h cycle, 12h-light followed by 12h-dark; 6h cycle, 6h-light followed by 6h-dark; 3h cycle, 3h-light followed by 3h-dark; continuous darkness.
The light-dark cycle did not have remarkable influence on the number of days to fully opening, flower size and color expression of petal and leaf. Vase life of the carnation exposed to continuous light was apparently shorter than that of intact one. The light-dark cycles of 6h and 12h extended the vase life: the vase life of the carnation exposed to 12h cycle lighting was significantly longer than that of intact one.
These results are suggested that 12h cycle lighting in BAA treatment is effective in extending the vase life of bud cut carnation as well as saving electricity.View full abstractDownload PDF (2256K) -
Drying condition and flour qualityGenta KANAI, Katsuhiko TAMAKI, Yuji NAGASAKI, Takaaki SATAKE2007 Volume 37 Issue 4 Pages 199-206
Published: March 25, 2007
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSEffects of drying conditions of classified grain on flour quality were examined to develop a drying classification according to the moisture content using the grain thickness classification. The grain classification was made with a 3.2mm sieve. Then the respectively classified grain groups were dried. The drying conditions were thin-layer drying at 50°C and 60°C, and no-air-flow condition at 40°C, 50°C and 60°C. The flour color was measured with a spectral diffraction colorimeter (CM3500; Konica Minolta Holdings Inc.) and starch properties were assessed using a Rapid Visco Analyzer (RVA-3D; Newport Scientific Pty. Ltd.).
Flour color was improved as the following order of groups: thinner, not-classified, and thicker. The starch quality of the thinner group, which has low moisture content, was hard to degrade, but that of the thicker grain, which has high moisture content, was easily degraded.
In thin-layer drying, the drying temperature did not affect flour quality. In no-air-flow condition, 40°C caused starch degradation, 60°C caused flour color degradation, and 50°C caused no major degradation.
Previously, 40°C drying had been inferred as sufficiently safe for high moisture grain. However, these results show that 40°C drying without airflow degrades the grain and that 60°C drying with sufficient airflow does not cause degradation.View full abstractDownload PDF (798K) -
Limi OKUSHIMA, Yasunaga IWASAKI, Shinsuke FURUNO, Sadanori SASE, Masah ...2007 Volume 37 Issue 4 Pages 207-214
Published: March 25, 2007
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe conventional and simple Web service system for cultivation test data in protected horticulture has been developed with popular technologies such as Apache, HTML, PHP and PostgreSQL. It offered an easy input/output interface for a user group to share the cultivation test data, because it was a conventional Web system such as data collection Web services. It included a layout function for data input forms and a function for the management of user groups. The data could be input and revised through a user created form or by uploading a csv data file. Also, the data could be output on the Web page or by downloading a csv file. The entered data could be easily demonstrated the data estimation or diagnosis Web service because of the conventional and simple Web system. As an example, a simple Web page of the greenhouse air cooling performance was displayed by the entered data through the Web system.View full abstractDownload PDF (3480K)
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