文献一覧: 小林良二 (著者)

4 0 0 0 OA 岩石の熱疲労に関する実験的研究

著者: 小林良二酒井昇松木浩二
出版者: 一般社団法人資源・素材学会
雑誌: 日本鉱業会誌 (ISSN:03694194)
巻号頁・発行日: vol.99, no.1140, pp.81-86, 1983-02-25 (Released:2011-07-13)
参考文献数: 12

It is well known that rocks are more or less deteriorated by sudden cooling after being heated. Furthermore, by repeating the cycle of heating-cooling, rocks might be expected to be weakened more severely.In this paper, measuring the changes of the physical and mechanical properties of rocks including apparent specific gravity, P-wave velocity, Young's modulus and uniaxial compressive strength, the thermal fatigue process of rocks is characterized for four kinds of rocks, namely, OGINO tuff, EMOCHI welded tuff, AKIYOSHI marble and INADA granite. The cylindrical specimens are suddenly submerged into water after being heated and the cycle is automatically repeated in the testing machine.The maximum temperature and the maximum cycles in the experiment are 600°C and 54, respectively.The main results obtained are as follows:(1) The main failure mechanism is different between the crystalline rock and the sedimentary rock. The failure of the former takes place by the thermal interaction between minerals and that of the latter by the transient thermal stresses. As the result, crystalline rocks collapse to be particles or powders and sedimentary rocks are fractured initiating regular thermal cracks (Fig.6).(2) The strengths of the rocks except welded tuff decrease remarkably within 5 cycles if the temperature is sufficiently high and the cooling time is larger enough (Fig.3).(3) The strengths of the rocks except marble decrease as the cooling time increases. However, the additional effect is very small if the cooling time is larger than that needed for the specimens to be perfectly cooled (Fig.4).(4) The cycles at which the specimens collapse exponentially increase as the temperature decreases (Fig.5).

2023-06-20 22:31:55
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1 0 0 0 OA 各種岩石の破壊靱性に関する研究

著者: 大塚尚寛小林良二
出版者: 一般社団法人資源・素材学会
雑誌: 日本鉱業会誌 (ISSN:03694194)
巻号頁・発行日: vol.98, no.1127, pp.1-6, 1982-01-25 (Released:2011-07-13)
参考文献数: 10

In order to determine the fracture toughness of various rocks, the splitting tests under the stiff-load are undertaken on eight kinds of rocks, namely OGINO tuff, KIMACHI sandstone, IZUMI sandstone, EMOCHI andesite, INADA granite, fine grained AKIYOSHI marble, medium grained AKIYOSHI marble and TOHOKU marble.The rock specimens (200mm×150mm×20mm) in which have a slot are prepared in this test. The crack initiation and the process of crack propagation are studied by the measurement of splitting load, crack opening displacement and crack length. The values of fracture toughness KIC of various rock specimens are determined with the compliance method, and the relationships between fracture toughness and mechanical properties are investigated.The main results obtained in this studies are as follows;(1) As a result in this test, it is seen that the fracture behaviours of rock specimens are divided into two groups. That is, the fracture crack of rock specimens of one group initiates after the maximum load point in the splitting load-crack opening displacement curve and propagates in a straight line, as OGINO tuff, KIMACHI sandstone, IZUMI sandstone, EMOCHI andesite and INADA granite. The fracture crack of rock specimens of other group initiates at the boundary of grains in rock before the maximum load point and the fracture crack in rock specimens propagateslowly along the boundary, as medium grained AKIYOSHI marble and TOHOKU marble.(2) From the relationship between fracture toughness and mechanical properties of various rocks, it becomes clear that fracture toughness of rocks increases in proportion to compressive strength, tensile strength and shear strength, and that fracture toughness decreases with the porosity of rocks increas.

2022-02-24 06:51:33
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1 0 0 0 OA 地域福祉コーディネーターの活動における支援タイプと関係資源 ―文京区社会福祉協議会のコーディネーター記録分析―

著者: 近藤秋穂浦田愛小林良二
出版者: 東洋大学福祉社会開発研究センター
雑誌: 福祉社会開発研究 (ISSN:2189910X)
巻号頁・発行日: vol.11, pp.19-33, 2019-03

2019-05-03 10:15:08
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http://id.nii.ac.jp/1060/00010451/

1 0 0 0 血管平滑筋収縮蛋白の制御

著者: 野々村禎昭高井義美清水孝雄柴田宣彦小林良二尾西裕文
出版者: 東京大学
雑誌: 特定研究
巻号頁・発行日: 1986

血管平滑筋は内皮細胞との関連では病変時特異的増殖, 脱分化を行い, いわゆる動脈硬化性変化をもたらす. この際の形態変化等は詳しく調べられているが, 生化学, とくに収縮蛋白質レベル, 及び分子生物学的レベルの研究は遅れている. 本研究班はその弱点をおぎない, 新らしい展開をはかる為に我国の平滑筋生化学者を結集した.本年は平滑筋のミオシンの構造については尾西が中心になり, 公募班員の岡本と共に一次構造と機能の関連について, ATP結合位等を明らかにさせた. 下等動物平滑筋のCatch機構については八木がミオシン重鎖のリン酸化でかなり明らかになった. 一方細いフィラメント側の調節機序に影響した因子によってラッチ機構が生じるが, この説明に野々村は大動脈からとったゲルゾリンファミリーが働く可能性を示し, その進んだ精製で86K, 84K, 45Kダルトン蛋白質が存在することを明らかにした. 一方, 丸山はこの45Kが84Kの中心分解物である可能性を示し, その精製を行った. 柴田は血管においてカルデスモン様蛋白質の存在を明らかにし, 祖父江はカラデスモンに2種類あり, 非筋細胞, 未分化型のものと筋, 分化型の違いを明らかにした. 小林は平滑筋膜よりカルパクチンをとり, 山本はCa-ATPアーゼをとって膜でのCa調節への足がかりを求めた. 高井は血管培養細胞のC-キナーゼ存在様式が成長因子との関係から異ることを示し, 清水はロイコトリエン連関酵素系の精製とその機能への結びつきを示した. 野島はCM(カルモジュリン)遺伝子クローニングをcDNAクローニングから進め, 高血圧との関係を追究している.本年は班員全ての研究が具体化し, すでに病態との関係へと入ってきた班員もあり, 来年度に向けての一層の具体化が期待される.