The involvement of phenolics and hydrogen peroxide in acibenzolar-S-methyl induced systemic acquired resistance on cucumber

Thesis (Ph. D. in Agricultural Science)--University of Tsukuba, (A), no. 5155, 2009.4.30Includes bibliographical references (leaves 113-134

人々の主観的な安心感に関する実証分析 : 地域社会の経済的状況とソーシャル・キャピタルの役割を中心に

Insecurity in social life is increasing among people. It has been believed that such people\u27s subjective well-being can be secured by ensuring social safety. However, recent researches have come to argue that there are different mechanisms between ensuring social safety and people\u27s sense of security. There is a growing need for empirical research on the social factors that determine people\u27s sense of security.In recent years, there has been a development in research on people’s subjective well-being in life. In the study, the scores of people\u27s subjective well-being, which is self-reported in various surveys, are estimated by using economic and social factors in order to identify policy measures that affect people’s subjective well-being in life. A series of empirical studies on happiness and life satisfaction in economics, sociology, and psychology have focused on factors such as the economic status of society, social capital, and people’s sense of control. However, there are few studies that explicitly treated people\u27s sense of security in life as a kind of subjective well-being and analyzed it with the same approach.In this paper, we analyze the relationship between people’s sense of security in life and social-economic factors by using the micro data collected through a questionnaire survey. This analysis focuses on the people’s sense of security in local life.Because we assumed that the people’s subjective well-being in life is nurtured by their daily lives and the community environment. The purpose of this paper is to analyze whether the sense of security in local life is defined by factors such as (1) the economic status of the community and (2) social capital, and (3) the sense of control that expresses individual psychological characteristics.The results show that enhancing the sense of control, accumulating bridging and network-type social capital and reducing unemployment rate of the comm unities contribute to ensure people\u27s sense of security in local life. Furthermore,raising the level of education is also found to be effective

磁気粘弾性エラストマを用いた可変剛性型動吸振器の開発

The dynamic vibration absorber is well known as a kind of passive-type vibration control device, where the mass and the stiffness elements basically comprise 1-dof system. Despite the reliability and the simplicity in constitution, the absorber does not work effectively for unexpected disturbances. The use of the absorber with fixed property is usually limited to a harmonically excited case, where the damper is only effective for pre-determined narrow frequency range. The damper design following well-known optimal tuning theory can extend the effective range, whereas the damping performance remains at a certain amount and yet the vibration caused by transient disturbances cannot be reduced sufficiently. A frequency-tunable dynamic absorber incorporating element with variable stiffness property can be a measure for placing adaptability to the structure against non-stationary disturbances, but the realization of such variability would be mechanistically complex and the problem of response time may become an issue. The Magneto-rheological elastomer (MRE) is known as a class of smart materials whose elastic property can be varied by the applied external magnetic field. In this paper, the MRE is adopted as the stiffness element in the dynamic absorber whose natural frequency is tunable by the external magnetic field. Both numerical and experimental investigations show that the vibration of 1-dof structure can be fully reduced by the proposed dynamic absorber with variable stiffness functionality

含氟硅低表面能共聚物的制备与表征

将丙烯酸六氟丁酯和γ-甲基丙烯酰氧基丙基三甲氧基硅烷与(甲基)丙烯酸(酯)进行共聚,合成含氟硅共聚物。用红外光谱(FT-IR)、X射线光电子能谱(XPS)和热重分析(TGA)对共聚物的结构和性能进行表征,并测试了共聚物膜的吸水率及对水和油的接触角。XPS结果表明,共聚物膜表面的F和Si元素相对物质的量明显高于150 nm深处,同时共聚物膜对水和油的静态接触角分别达到110°和80°以上,说明F、Si元素自组装迁移,形成了低表面能表面;TGA研究结果表明,共聚物膜的热分解温度从195℃提高到226℃,升温过程中分解速率明显降低。该含氟硅共聚物具有良好的热稳定性、低的吸水率和良好的疏水防污性

水稲新品種「夢あおば」の育成

In the breeding program aiming at developing rice varieties with extreme high yielding ability, we bred a new rice variety, Yumeaoba, at the Hokuriku Research Center of the National Agricultural Research Center. This variety is a non-glutinous rice variety, suitable for whole crop silage (WCS), with early maturing, excellent lodging tolerance, and high yielding ability. Yumeaoba was bred from the progeny of a cross between Jyou 321 and Ouu 331 (named as Fukuhibiki later) in 1990. From the F11 progenies, we selected one promising line and named Hokuriku 187, and submitted the line to various locations for evaluating local adaptability. Hokuriku 187 was officially registered as Paddy Rice Norin 398 in MAFF and in 2004 it was named as Yumeaoba. Agronomic characters of Yumeaoba evaluated are as follows. Its heading date is slightly later than Fukuhibiki and 4 to 5 days earlier than Kusayutaka. The culm length is 9cm longer than that of Fukuhibiki, whereas it is 8cm shorter than that of Todorokiwase. Its panicle length is slightly longer than Fukuhibiki and the panicle number is significantly less than those of Fukuhibiki and Todorokiwase. The plant type of this variety is classified into panicle weight type. The shape of brown rice is slightly slender and 1000-kernel weight is estimated to be about 26.5 g. The dry matter yield in the yellow-ripe stage is more than those of Fukuhibiki and Todorokiwase in transplanting culture and direct sowing in flooded paddy fields. The total digestive nutrients (TDN) in the yellow-ripe stage are estimated to be nearly 60%, which corresponds to that of timothy grass in its heading stage. Yumeaoba is estimated to possess true blast resistance genes, Pita-2 and Pib, but its field resistances for leaf blast and panicle blast are not known. To stripe virus disease and bacterial leaf blight, this variety appears to be resistant. Yumeaoba is tolerant to lodging and suitable for direct sowing in flooded paddy fields. Its tolerance to sprouting is moderate, but its cool weather tolerance isweak. Thus, Yumeaoba can be grown in regions from middle-Tohoku area to Kyushu area for the use of WCS