Journal of Home Economics of Japan
Online ISSN : 1882-0352
Print ISSN : 0913-5227
ISSN-L : 0913-5227
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Volume 61, Issue 11
Displaying 1-7 of 7 articles from this issue
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  • Prediction of Energy Expenditure in Japanese Children from Triaxial Accelerometer Counts and Heart Rate
    Katsura OMORI, Kayo KOIZUMI, Kayoko KANEKO
    2010 Volume 61 Issue 11 Pages 707-715
    Published: November 10, 2010
    Released on J-STAGE: July 01, 2013
    DOIhttps://doi.org/10.11428/jhej.61.707
    JOURNAL FREE ACCESS
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    The objective of this study was to obtain the basic data for developing an accurate and simple method to assess the daily physical activity of children. A portable expiration gas metabolic monitor was used to measure energy expenditure during several daily activities in fifteen children of 9 to 15 years of age. The triaxial accelerometer counts of the wrist, waist and ankle, and the heart rate were also measured. Energy expenditure during daily activities was strongly correlated with the increase in heart rate from that while sitting at rest in both boys and girls. The triaxial accelerometer counts of the wrist, waist and ankle were significantly related to energy expenditure; however, the correlation coefficient of the triaxial accelerometer counts of the wrist with energy expenditure was lower than that of the waist or ankle for both the boys and girls. A multiple regression analysis indicated that 84-88% of the variation in energy expenditure could be explained by the gender, body size, heart rate and triaxial accelerometer counts.
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  • Antioxidative Activity and Flavonoid Composition of the Acid Precipitates from a Rooibos Tea Extract
    Satsuki UNE, Ikuyo SUGIMOTO, Junichi AKIYAMA, Itaru YAMAMOTO, Norio ...
    2010 Volume 61 Issue 11 Pages 717-723
    Published: November 15, 2010
    Released on J-STAGE: July 01, 2013
    DOIhttps://doi.org/10.11428/jhej.61.717
    JOURNAL FREE ACCESS
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    Rooibos tea is a well-known beverage characterized by its high level of antioxidative activity and its caffeine-less property. The antioxidative activity and flavonoid composition of the acid precipitates from a rooibos tea extract were examined. The formation of precipitates was absolutely dependent on the acidity of the tea extract below pH 3.3, and hydrochloric acid among some acids employed was the most efficient acid to yield precipitates with high antioxidative activities. The precipitates contained a limited number of flavonoids, including homoorientin, orientin, isovitexin, vitexin, and rutin. These flavonoids exerted as potent antioxidative activities as that of quercetin. Aspalathin, a major chalcone-type flavonoid characteristic to rooibos leaves, was not detected in the acid precipitates. These results indicate that the acid precipitates from a rooibos tea extract may be suitable for the development of supplements which exert functional effects similar to that of rooibos tea itself.
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  • Synthesis and Characterization of Surfactant Based on a Sea Lettuce Extract
    Rumiko FUJIOKA, Tomoko HIGASHIYAMA, Naoko TAKAMI, Yaeko FURUTA, To ...
    2010 Volume 61 Issue 11 Pages 725-728
    Published: November 15, 2010
    Released on J-STAGE: July 01, 2013
    DOIhttps://doi.org/10.11428/jhej.61.725
    JOURNAL FREE ACCESS
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    Novel surfactant based on a sea lettuce extract has been synthesized by etherification with butanol, followed by transetherification with dodecanol. An aqueous solution of the reaction product showed a low contact angle on Teflon film and low surface energy; their values were somewhat lower than those obtained for commercially available surfactants such as sodium dodecyl sulfonate and sodium dodecylbenzene sulfonate. The reaction product also exhibited excellent biodegradability in activated sludge. These experimental results clearly support the idea that the sea lettuce extract has high potentiality for feedstock as an environmentally friendly surfactant. Furthermore, material circulation on a limited regional scale, that is, local production for local consumption of the surfactant for daily use, can be achieved when the surfactant based on the sea lettuce extract is put to practical use.
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  • Distribution and Consumption of Fresh Tea Leaves in Vietnam
    Miyuki KATOH1, Hiroko NAGANO, Masashi OMORI
    2010 Volume 61 Issue 11 Pages 737-740
    Published: November 15, 2010
    Released on J-STAGE: July 01, 2013
    DOIhttps://doi.org/10.11428/jhej.61.737
    JOURNAL FREE ACCESS
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    The distribution method and consumption of tea products (except green tea) in Vietnam were studied. Fresh tea leaves are distributed in bundles like vegetables in South Vietnam, while in Hanoi, North Vietnam, fresh tea leaves are put into baskets and sold. Che xanh fresh tea leaves are infused by hot water together with ginger to serve for drinking. It presents a cool feel, although having some grassy smell.
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  • The Connection between Self-esteem in Family Relationships and Relationships with Friends, and General Self-esteem in Elementary School Pupils
    Yoshiko KATOU, Atsuko NISHI
    2010 Volume 61 Issue 11 Pages 741-747
    Published: November 15, 2010
    Released on J-STAGE: July 01, 2013
    DOIhttps://doi.org/10.11428/jhej.61.741
    JOURNAL FREE ACCESS
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    Objective: The purpose of this study is to clarify the connection between self-esteem in family relationships and relationships with friends, and general self-esteem. Methods: 154 elementary school pupils (78 boys and 76 girls) were surveyed as part of this research. The survey was conducted using three kinds of questionnaires about self-esteem in the family, with friends, and in general. Results: Validity and reliability of these three scales were confirmed. The results of covariance structure analysis indicate that self-esteem in the family directly affects general self-esteem. Self-esteem in the family also influences general self-esteem through self-esteem with friends. Conclusion: For elementary school pupils self-esteem in the family is an important factor in the process of establishing self-esteem with friends and in general.
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