8 research outputs found

    ショウレイ ホウコク 100サイ ソウセイジ ト チョウジュ

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    日本では,各自治体の長が敬老の日に通常100歳以上の老人を訪間して,その長寿を祝う習わしがある。1992年には女性の100歳以上長寿者が3330人あり,この中に1組の100歳双生児姉妹がいた。この双生児は多くの遺伝マーカーによって1卵生双生児と診断された。健康診査により同年齢の者に比べて,極めて良好な健康状態であることが明らかになった。この理由としてバランスのとれた食事,規則正しい3回の食事摂取,十分な睡眠,毎日30分の運動等にみられる良好な生活習慣,ふたりに共通にみられる強い性格,ふたりのよい意味でのライバル意識などによると考えられた。journal articl

    Observation of B0→D*-(5π)+, B+→D*-(4π)++ and B+→D̅*0 (5π)+

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    journal articl

    Relaxed Chromatin Formation and Weak Suppression of Homologous Pairing by the Testis-Specific Linker Histone H1T

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    Linker histones bind to nucleosomes and compact polynucleosomes into a higher-order chromatin configuration. Somatic and germ cell-specific linker histone subtypes have been identified and may have distinct functions. In this study, we reconstituted polynucleosomes containing human histones H1.2 and H1T, as representative somatic and germ cell-specific linker histones, respectively, and found that H1T forms less compacted chromatin, as compared to H1.2. An <i>in vitro</i> homologous pairing assay revealed that H1T weakly inhibited RAD51/RAD54-mediated homologous pairing in chromatin, although the somatic H1 subtypes, H1.0, H1.1, H1.2, H1.3, H1.4, and H1.5, substantially suppressed it. An <i>in vivo</i> recombination assay revealed that H1T overproduction minimally affected the recombination frequency, but significant suppression was observed when H1.2 was overproduced in human cells. These results suggested that the testis-specific linker histone, H1T, possesses a specific function to produce the chromatin architecture required for proper chromosome regulation, such as homologous recombination

    有限ユーザCDMA Unslotted ALOHA 方式のスループット解析法に関する一検討

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    CDMA Unslotted ALOHA 方式のスループット特性を、ユーザ数有限という条件の下で待ち行列モデルを用いて解析的に導出し、特性評価を行う。またこの方式にCLSPを適用したシステムも同様にして特性を解析的に導出する。journal articl

    太陽熱利用による穀物の人工乾燥(I): ビニ-ルハウスを集熱器としたもみの通風乾燥

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    application/pdf1)This Study was conducted in order to attain much reduction of the petroleum required for grain drying, the consumption of which is now the largest in all grain producing processes. A new drying method, whereby solar energy is directly used as much as possible, was employed. 2)This grain drying method making use of solar energy is as follows: Flat bed type forced-air dryers are placed in a 90㎡ green house which is used as a solar collector, and heated air is sucked through grain layers to be exhausted out of the green house. Experiments were conducted in 1980 and 1981 in order to study whether such a solar dryer system has a drying rate and a drying capacity large enough to be incorporated into the existing mechanized harvesting and processing operation system in our country. 3)In 1980, drying experiment using one flat bed type placed in the house mentioned above was performed to learn what degree of drying rate attained by utilizing solar heated air in the house only. As a result, it was found that final drying of raw paddy is accomplished within a short period of time, that is, within a day or so when drying is performed on fine days. 4)In 1981, drying experiment was performed, using 3 flat bed type forced-air dryers placed in the house mentioned above, to study how much time is needed to dry a certain amount of raw paddy. As a result, it was found that final drying of 4 tons of such paddy can be accomplished in one or two weeks inclusive of rainy days, though both harvesting and drying operations are greatly affected by the weather. It is estimated that by full use of this equipment, final drying of 14 tons of such paddy harvested from 3 ha of paddy field can be accomplished satisfactorily in 45 days in the proper harvesting period from mid-September to the latter part of October. 5)Mean moisture reduction rate representing the drying rate was 0.71%/h as the average of measurements in 1980. In 1981, it was 1.0-1.5%/h on fine days and 0.5%/h on fine days and 0.5%/h on cloudy days, and 0.44%/h as the average of measurements obtained in total forced-air drying time inclusive of rainy days. On the other hand, the collector efficiency of the house as defined by the formula (1-7) was 14.1%as the average in 1980 and 24.4% as the overall average value in the experiment in 1981. 6) With regard to the relationships between cumulative solar radiation, quantity of heat delivered by solar system and amount of evaporated grain moisture in the experiment in 1981, it was found that these were nearly in a proportional relation as shown in Fig.1-12departmental bulletin pape
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