出版者
医歯薬出版
巻号頁・発行日
1997
著者
若杉 三紀夫 山本 高広
出版者
社団法人日本材料学会
雑誌
材料 (ISSN:05145163)
巻号頁・発行日
vol.40, no.457, pp.1372-1378, 1991-10-15

The effects of three types of polymer modification on both hydration characteristics and physical properties of the gypsum pastes and mortars originated from anhydrite plaster have been studied at various polymer-gypsum ratios. The polymer dispersions used were ethylene-vinyl acetate (EVA), polyacrylic ester and styrene-butadiene rubber. The degree of hydration of the gypsum pastes and mortars was examined by X-ray diffraction, scanning electron microscopy, differential scanning calorimetry and porosity measurement. The setting time of fresh gypsum mortars (polymer-modified and unmodified) as well as the physical properties of hardened gypsum mortars were also measured. The hydration was complete in about 3 days, and the degree of hydration of the polymer-modified gypsum mortars was smaller than that of unmodified mortar. The setting time of gypsum mortars was retarded by the addition of polymer, and was affected by the chemical structure of polymer. The flexural and tensile strengths of the EVA-modified mortar with a polymer-gypsum ratio of 5% were higher than those of unmodified mortar. Its elastic modulus was the smallest of all, and further EVA-modified mortars showed small linear expansion. From the above test results, the EVA-modified gypsum mortar with a polymer-gypsum ratio of 5% was shown to be one of the candidates of the better plastering materials for polystyrene and polyurethane foams.
著者
寺沢 重法 Terazawa Shigenori
出版者
「宗教と社会貢献」研究会
雑誌
宗教と社会貢献 (ISSN:21856869)
巻号頁・発行日
vol.4, no.2, pp.31-38, 2014-10

Richard Madsen, Democracy's Dharma: Religious Renaissance and Political Development in Taiwan, University of California Press、2007 年11 月、Octavo 型、191 頁、$31.95
著者
別府 賢治 藤本 華倫 片岡 郁雄
出版者
香川大学
雑誌
香川大学農学部学術報告 (ISSN:03685128)
巻号頁・発行日
vol.59, pp.55-58, 2007-02-28

暖地条件における秋季のホウ素の葉面散布が、甘果オウトウ'佐藤錦'の翌春の花器の発育および結実に及ぼす影響を調査した。9月上旬にホウ素濃度500ppmのホウ酸溶液を鉢植え樹の全葉に噴霧処理した。ホウ素処理により、翌春の胚珠の寿命が延長し、花柱内での花粉管伸長がやや速まった。ホウ素処理区では対照区に比べて結実率がやや高まった。これらのことから、暖地条件における秋季のホウ素の葉面散布は、翌春の結実性を向上させる効果があることが示された。
著者
土橋 豊
出版者
園芸学会
雑誌
園芸学研究 (ISSN:13472658)
巻号頁・発行日
vol.8, no.1, pp.87-91, 2009-01-15

栽培期間中の上白糖(スクロース98%以上含有)葉面散布が切り花用トルコギキョウおよびキンギョソウ花壇苗の品質に及ぼす影響を検討した.0.1%上白糖の4回葉面散布により,トルコギキョウの花数が有意に増加するとともに,切り花長と花数に基づく階級別品質指数が増加した.一方,0.1%上白糖の2回葉面散布により,キンギョソウ花壇苗の暗黒条件下の葉色の退色の軽減,および無加温ガラスハウスの開花数の増加が認められた.以上の結果,栽培期間中の上白糖葉面散布処理は,両植物の品質保持,または向上に有効であることが明らかになった.
著者
谷田沢 道彦 東野 正三
出版者
一般社団法人日本土壌肥料学会
雑誌
日本土壌肥料學雜誌 (ISSN:00290610)
巻号頁・発行日
vol.24, no.4, pp.193-196, 1953-12-20
被引用文献数
1

In the preceeding paper, the authors have found the rapid incorporation of inorganic phosphate absorbed through lear epidermis into some organic combinations including acid soluble-barium soluble phosphorus compounds primarily. In the present paper, resting on the basis of fine separation of phosphorus compounds in the use of paper-chromatography, the discussion on the forms of transferring phosphate after the foliar absorption are made. Thus one of the leaves of shakshina (Brassica chinensis L.) grow in field, about 30cm high, was applied with ca 1.5ml. of 1/75 M potassium dihydrogen phosphate containing P-32 in the strengh of 5 micro curie/ml. on a fine day. After 4 hours of this application, the poetiole was cut, and the exudation from this cut end was used for paper-chromatography as it was recommended by R. S. BANDURSKI and B. AXELROD. The developed paper strip was examined for its phosphorus spots by spraying HANES-ISHERWOOD reagent and its radio-activity by means of Geiger-Muller counter as it was reported by R. M. TOMARELI and K. FLOREY. Obtained paper-chramatograms and radiograms are shown in Fig. 1 and 2. Compared with Rf value of each particular known phosphorus compounds that had been determined in the same condition as that employed in the experimental procedure, transferring chief phosphorus compounds which have been newly synthesized in leaves are estimated to be confined to a few other compounds than any of ortho-phosphoric acid, glucose-1-phosphate, and fructose-6-phosphate. Under the condition which have been made, the sum of radio ortho-phosphoric acid, glucose-1-phosphate, and fructose-6-phosphate in the exudate is concieved less than 10% of total radio phosphorus in the exudate. S.ARONOFF has shown that the primary products of phosphate assimilation by soybean roots is fructose-1,6-diphosphate together with some phosphorylated organic acids, and also in our experiment, inorganic phosphate absorbed through leaf-surface is illustrated to be easily assimilated in leaf tissue and converted to such products.
著者
前田 敏 小島 均
出版者
九州大学
雑誌
九州大學農學部學藝雜誌 (ISSN:03686264)
巻号頁・発行日
vol.17, no.1, pp.33-39, 1959-03

It was said that, in general, foliar-absorbed P-32 moves through the phloem of the stem both upward and downward from the leaf, or ascendes the stem through the xylem and descendes through the phloem. However, it was also reported that, when the radiophosphorus was accompanied by a large amount of water, it was transported in the stem both upward and downward chiefly through the xylem. As the m o re definitive observations on these problems were desirable the authors made researches with the macro-as well as microautoradiography method. Submerging the leaf entirely in a P-32 aq., the radiophosphorus was ab s orbed with relatively rich amount of water through the leaf surface. Then the P-32 movcd upward and downward in the stem ; and the microautoradiograph on the section of stem above the leaf which absorbed the solution showed that the radioactive substance was found merely in the contents of the vessel or in the xylem. The macroautoradiograph of the total stem of the plant and the radioactivity (measured with the G. M. counter) in the ash of leaves of the plant also proved that the radioactive phosphorus moved through the vascular bundle system.葉面吸収後の物質の移行経路は, 一般に師管を通つて上下するか, 或いは道管を経て上り, 師管を経て下るものとされている. しかし, 葉面吸収に際し大量の吸水を伴う場合には蒸散流の影響のため上下向とも主として木部を通ると云う報告があり, 筆者らはこれを microautoradiography によつて検討した. その他 macroautoradiography 及び G. M. counter による組織のradioactivityの測定等の知見から次の様なことが云える. 葉をP-32水溶液につけてP-32と共に大量の水を吸わせると, 水は吸収させた葉から葉柄を経て上方下方に進むが, 此の様な場合には, P-32は根からの上方への移行と同様に大部分道管を通つて上方に移動するものと思われる.