JaLCDOI 10.18926/47026
FullText URL mfe_36_2_061_066.pdf
Author Yamagiwa, Masashi| Namba, Akitoshi| Akao, Tetsuyuki| Mizuki, Eiichi| Ohba, Michio| Sakai, Hiroshi|
Abstract The crystal proteins produced by Bacillus thuringiensis subsp, israelensis (Bti) and subsp. coreanensis A1519 strain were examined for the cytotoxicity against MOLT-4 and HeLa cells by MTT assay and LDH assay, The A1519 crystal proteins processed by proteinase K exhibited the specific cell-killing activity toward MOLT-4 with little damage to the cell membrane, On the other hand, the Bti crystal proteins processed by proteinase K caused the substantial damage to the cell membrane of both MOLT-4 and HeLa, leading to the cell lysis. The non-digested crystal proteins of both strains exhibited no cytotoxicity, These data suggested that while the Bti crystal proteins caused the colloid-osmotic swelling and cell lysis of MOLT-4 and HeLa, the proteinase K-digested A1519 crystal proteins induced the specific cell death of MOLT-4 through a mechanism other than that of Bti.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2002-03
Volume volume36
Issue issue2
Start Page 61
End Page 66
ISSN 0475-0071
language 英語
File Version publisher
NAID 80015582224
Author Funahashi, Hiroaki|
Published Date 1998-02
Publication Title 岡山大学農学部学術報告
Volume volume87
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/15363
FullText URL Mem_Fac_Eng_OU_34_39.pdf
Author Hayakawa, Satoshi| Shirosaki, Yuki| Yabuta, Takeshi| Tsuru, Kanji| Ohtsuki Chikara| Osaka, Akiyoshi|
Abstract Silicone elastomer was chemically treated at 60℃ for 7 days with 30 wt% H(2)O(2) solutions with or without TaCl(5) and soaked for various periods in a simulated body fluid(Kokubo solution) up to 21 days. Apatite formation ability of the surface of the silicone elastomer specimens was investigated with thin-film X-ray diffraction and FT-IR reflection spectroscopy. These silicone specimens did not deposit apatite or calcium phosphates, irrespective of chemical treatment. Osteoblast-like cells (MC3T3-El) derived from mouse were cultured on the specimens at 36.5℃ under 5%C0(2) and 95% humidity. Similar degree of proliferation of cells was observed at 7 days among three specimens, while the no treatment specimen after incubation for 5 days showed a lower degree of proliferation than the silicone treated with 30 wt% H(2)O(2) solutions with or without TaCl(5). Alkaline phosphatase activity of the cells proliferated on the no treatment specimen was lower than those of the silicone treated with 30 wt% H(2)O(2) solutions with or without TaCl(5). These results indicate that the cytotoxicity of the silicone could be improved by the chemical treatment with 30 wt% H(2)O(2) solutions with or without TaCl(5).
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2000-03-27
Volume volume34
Issue issue1-2
Start Page 39
End Page 43
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002308019
Author Inouye, N.|
Published Date 1983-02
Publication Title 農学研究
Volume volume60
Issue issue2
Content Type Departmental Bulletin Paper
Author Inouye, N.|
Published Date 1968-06-24
Publication Title 農学研究
Volume volume52
Issue issue2
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/15456
FullText URL Mem_Fac_Eng_OU_28_2_21.pdf
Author Yamamoto, Kyoji| Jiao Xuezhen|
Abstract An experimental investigation has been made of the cyclone dust collector with a perforated internal rotating cylinder. The size of the rotating cylinder is of 0.5D, where D is the diameter of the cyclone body, and is the same size as the outlet tube. The dust collection efficiency as well as the pressure loss has been measured when the inlet flow speed is 9 ~ 21 m/s and the rotating speed of the cylinder is 37 ~ 63 m/s. The velocity and pressure distributions were also measured. It is found that the collection efficiency decreases and the pressure loss increases as the rotating speed increases. It is also shown that both the inward radial velocity and the upward vertical velocity become large as the rotating cylinder increases its speed. As a whole, the rotation of the internal cylinder makes worse performance of the cyclone dust collector.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1994-03-15
Volume volume28
Issue issue2
Start Page 21
End Page 31
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307575
Author Kanzaki, Hiroshi| Abe, Yasuteru| Kawazu, Kazuyoshi|
Published Date 1998-02
Publication Title 岡山大学農学部学術報告
Volume volume87
Issue issue1
Content Type Departmental Bulletin Paper
Author Kasai, Mikio|
Published Date 1923-05-20
Publication Title Berichte des Ohara Instituts für landwirtschaftliche Forschungen
Volume volume2
Issue issue3
Content Type Departmental Bulletin Paper
Author Shiomi, Shinjiro| Nakamura, Reinosuke|
Published Date 1996-02-01
Publication Title 岡山大学農学部学術報告
Volume volume85
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/1155
FullText URL 12_0105_0124.pdf
Author 李 倢|
Abstract 都市内の人口密度分布は、都心からの距離に応じて逓減することが経験的に知られている。そして、都市内の人口密度分布を説明する関数形の大半も、人口密度が距離に関して常に一定割合で逓減する負の指数関数(Negative Exponential Fynction)モデルを基本的には仮定している。 しかし、経済発展にともなう都市化の過程では、既存都市への人口集中によって、都市の外延部の未開発地域が都市地域に組み込まれ、都市地域が連続的に拡大する郊外化現象が現れる一方、都市の郊外化にともなう都市部の人口流出が多く見られる。これは都心部における居住密度が低下する都心部の人口空洞化、いわゆる人口密度分布のドーナツ化現象である。 このような最近の都市の空間構造を考えると、伝統的でかつ単純な負の指数関数モデルでは人口密度分布を十分に説明できないことになる。そこで、本論文は、Anderson(1982,1985)によって人口密度分布の推定に適用された三次関数を基本とするCubic Spline関数を用いて、都市の空間構造を反映できるモデルの定式化を試みる。それによって、最近の都市空間における人口密度分布を精緻に描くことが期待できる。 Cubic Spline関数を用いて人口密度分布を推定する際に、Alperovich(1995)は、節点の位置と区間の数を決めるには一般的な基準がなく、外生的に決められているのがSpline関数の固有の限界であることと、推定されたモデルの係数のt-値と決定係数が極めて低いことを指摘している。本論文では、Cubic Spline関数の基本形を用いることによって、任意に決められた節点の位置と区間の限界を回避する方法を模索しながら、人口密度分布への応用を試みる。 これまでのCubic Spline関数を用いた実証研究では、研究対象が大都市圏となっている。それらの研究によると、大都市においては都心部の人口空洞化現象が明らかになっている。しかし、都心部の人口空洞化現象が大都市固有なものであるか、あるいは都市の発展にともなって発生する現象であるかを検討する必要がある。本論文は、地方中核都市である岡山市を事例として取り上げ、岡山市における常住人口密度の空間分布の分析によって、都市発展の形態を究明することを目的とする。 現実の都市においては、地質上の差異、方向別に開発進度が異なっていることがしばしば見られる。そのため、人口密度が都心を中心に同心円に分布しているのではなく、都心からの方向別によって、異なる形状を呈している。ここでは、北東、北西、南西、南東の4つの方向別に、それぞれ1970年と1995年の2時点でモデルを推定し、岡山市における25年間の空間構造の変化について考察する。それによって、都心部の人口空洞化現象(並び人口の郊外化現象)を明らかにし、方向別による開発パターンの違いを検証する。 最後では、都市の空間構造における人口密度分布と密度分布における変化の要因の分析について、研究方向および問題点を述べる。
Keywords Cubic Spline関数 人口空洞化現象 岡山市
Publication Title 岡山大学大学院文化科学研究科紀要
Published Date 2001-11
Volume volume12
Issue issue1
Start Page 105
End Page 124
language 日本語
File Version publisher
NAID 120002306118
JaLCDOI 10.18926/15612
FullText URL Mem_Sch_Eng_OU_3_89.pdf
Author Monobe Kazuo| Yamashita Yuhiko| Fujiwara Yasuo| Fujiwara Masahiko|
Abstract It was shown that the fibrous crystals of isotactic polybutene-l crystallized from solution under shearing stress are also composed of the central threads with an extended chain character and the epitaxally deposited lamellae with a folded chain character. The characteristic behaviors in this polymer exist in; (1) that the resulting crystals possess the hexagonal modification of form 1'; (2) that at low polymer concentrations the lamellar crystals with an orthorhombic modification of form Ⅲ are precipitated in similar fashion to the case in the absence of stirring; (3) that the morphology in surface replica of thick deposited film is very similar to that of melt extruded polyethylene film crystallized in a highly stressed state.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1968-09-01
Volume volume3
Issue issue1
Start Page 89
End Page 94
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307171
JaLCDOI 10.18926/15611
FullText URL Mem_Sch_Eng_OU_3_85.pdf
Author Monobe Kazuo| Fujiwara Yasuo| Yamashita Yuhiko| Hironaka Kiyoshi|
Abstract Isotactic polypropylene was crystallized in the form of fibrous crystals from solution under shearing stress. The fibrous crystals consist of the oriented cluster of micro fibrils. From the electron microscopy and the electron diffraction study, it was found that the fine texture of this fibrous crystals is also the two component systems which are composed of the central threads with an extended chain character and the lamellae with a folded chain character deposited on the threads, as in polyethylene. Relatively larger lamellar structure than that of polyethylene was observed. The effect of crystallization conditions to the formation of the fibrous crystals from solution of isotactic polypropylene was described briefly. A characteristic melting behavior due to the melting of the central threads with an extended chain character was observed from the thermogram of differential scanning calorimeter.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1968-09-01
Volume volume3
Issue issue1
Start Page 85
End Page 88
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307605
JaLCDOI 10.18926/15625
FullText URL Mem_Sch_Eng_OU_3_77.pdf
Author Monobe Kazuo| Yamashita Yuhiko| Fujiwara Yasuo| Fujiwara Yoshitaka|
Abstract We tried to clarify the crystallization mechanism of long chain polymers in solution under shearing stress using polyethylene. From the bright and dark field electron microscope observations and the electron diffraction study, we demonstrated that the resulting fibrous crystals consist of the central threads with an extended chain character and the lamellae with a folded chain character nucleated on the threads. The measurements of thermal and mechanical properties gave the additional confirmation for this suggestion. From these results we discussed the crystallization mechanism on the fibrous crystals.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1968-09-01
Volume volume3
Issue issue1
Start Page 77
End Page 83
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307234
JaLCDOI 10.18926/17822
FullText URL Mem_Fac_Eng_OU_43_1.pdf
Author Shimizu, Kenichi| Torii, Tashiyuki| Ishida, Koki|
Abstract Using a fatigue testing method by which fatigue cracks can be initiated and propagated in a film adhered to cover an elliptical through-hole in a base plate subjected to push-pull cyclic loads, annealed copper films with the thickness of 100μm and those reduced the thickness from the 100μm to 50μm by an electro-polishing were fatigued under a constant stress amplitude with a stress ratio of zero. The crystal rotation behavior with the fatigue crack propagation was investigated by measuring the crystal orientation around the fatigue crack initiated from the notch root before and after fatigue testing, using EBSD (Electron Back-scatter Diffraction) method. Then, the change of crystal orientation with fatigue testing was evaluated quantitatively from the misorientation between the crystal orientation matrix on the same point obtained before and after fatigue testing. As a result, the angle of the crystal rotation obtained from the region showing the high fatigue crack propagation rate was larger than that obtained from the region showing the low fatigue crack propagation rate for the film with the thickness of 100μm, while the fatigue crack propagated faster in the film with the thickness of 50μm than that with the thickness of 100μm regardless of the small crystal rotation angles with the fatigue testing for the film with the thickness of 50μm.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2009-01
Volume volume43
Start Page 1
End Page 7
ISSN 1349-6115
language 英語
File Version publisher
NAID 120002308710
JaLCDOI 10.18926/55797
FullText URL scs_017_095_104.pdf
Author Tanaka, Tomoko|
Publication Title Studies in Cultural Symbiotics
Published Date 2018-03-22
Volume volume17
Start Page 95
End Page 104
ISSN 1880-9162
language 英語
Copyright Holders Copyright © 2018 岡山大学大学院社会文化科学研究科
File Version publisher
NAID 120006416148
JaLCDOI 10.18926/fest/11635
FullText URL 001_169_179.pdf
Author Abenney-Mickson Stephen| Miura, Takeshi|
Abstract The SWAP93 model was used to predict how much capillary rise would occur in cropped fields. The experimental fields were located in a humid climate and it was thought that contribution from groundwater sources to total water use could be significant. In one field planted with soybean, the model predicted an average daily uptake of 1.3 mm; in another field planted with pumpkin, there was average daily uptake of 0.3 mm; and yet in a third field located in a vinyl house there was average daily uptake of 0.03 mm. These predictions represent about 38,7 and 1% contribution to total water use respectively. Even though there were no measured data to compare with, the results lie within the range of other works reported in the literature.
Keywords Crop water use capillary rise SWAP93 model groundwater
Publication Title 岡山大学環境理工学部研究報告
Published Date 1996-03
Volume volume1
Issue issue1
Start Page 169
End Page 179
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313364
Author Fast, Thomas| Prichard, Caleb| Morioka, Akemi| Rucynski, John|
Published Date 2014-12
Publication Title 大学教育研究紀要
Volume volume10
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/11655
FullText URL 001_277_288.pdf
Author Tonomura, Naohiko|
Abstract This paper is an attempt to establish an objective criterion for civilizations, in order to treat them impartially and give them a fair assessment. First, theories up to the present about civilizations including those of Spengler and Toynbee are introduced. Second, the criterion presented by Bagby to distinguish major civilizations and peripheral civilizations are examined and proved to be subjective. Then the author proposes as an objective criterion for big civilizations just the pattern of succeeding four stages with the span of 400~500 years each. Big civilizations meeting this requirement which total eight or nine are divided into two types according to the difference of their nature. Lastly is shown how four puzzles of world history that have hitherto caused a lot of disputes (feudalism, absolute power of royalty, capitalism and modernization) can be solved through the recognition of these big civilizations.
Publication Title 岡山大学環境理工学部研究報告
Published Date 1996-03
Volume volume1
Issue issue1
Start Page 277
End Page 288
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313986
JaLCDOI 10.18926/15717
FullText URL Mem_Sch_Eng_OU_13_153.pdf
Author Fukui, Kiyoshi| Nogi, Shigeji| Yamada, Masuo| Sakakibara, Akira|
Abstract A unified treatment of injection and mutual phase locking phenomena in microwave oscillators coupled by a network characterized by a Y-matrix is presented. Under certain simplifying assumptions, steady state solutions such as locking frequency and oscillation phase relation are given with emphasis placed on the coupling-network dependence of locking bandwidth. Also, some examples of locking system specified by y(21)=0, Y(21)= Y(12) and y21= -Y12 are briefly discussed.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1979-03-05
Volume volume13
Start Page 153
End Page 162
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307532
Author Hori, Satoshi| Tanabe, Akira|
Published Date 1956
Publication Title 岡山大学農学部学術報告
Volume volume8
Issue issue1
Content Type Departmental Bulletin Paper