検索結果 - 岡山大学学術成果リポジトリ

Effects of the Cultivation Method on the Characteristics or Gene Expression Profiles of Aspergillus oryzae Using mCD or DPY Media

JaLCDOI	10.18926/19962
フルテキストURL	Mem_Fac_Eng_OU_44_73.pdf
著者	Imanaka, Hiroyuki\| Tanaka, Soukichi\| Feng, Bin\| Imamura, Koreyoshi\| Nakanishi, Kazuhiro\|
抄録	We used modified Czapek-Dox (mCD) or dextrin-peptone-yeast extract (DPY) media to cultivate a filamentous fungus, Aspergillus oryzae IAM 2706 by three different cultivation methods, i.e., shaking-flask culture (SFC), agar-plate culture (APC), and membrane-surface liquid culture (MSLC), to identify the differences in cultivation behaviors and gene transcriptional profiles. The fungi cultivated by APC or MSLC secreted a greater number of different proteins/enzymes in larger quantities compared with fungi cultivated by SFC, particularly when DPY medium was used. In particular, the amounts of protease secreted by fungi cultivated via MSLC or APC were much greater compared with SFC. When mCD medium was used, α-amylase activity was barely detectable in all cultures while the activity was detected in MSLC and APC in a quantity that was several times higher than that in SFC using DPY medium. SDS-PAGE analysis and N-terminal amino acid sequences confirmed 6 proteins in the culture supernatants when DPY medium was used. Among these proteins oryzin (an alkaline protease) and α-amylase were detected at much higher levels in APC and MSLC compared with SFC, which was consistent with the measured activity of the secreted enzymes. However, when mCD medium was used, only oryzin was detected in significant amounts in MSLC and APC. Microarray analyses of the fungi cultivated by SFC, APC or MSLC using either mCD or DPY media indicated that the gene transcriptional profile of the MSLC sample was similar to that of the APC sample but different from that of the SFC sample. When mCD medium was used, most of the genes that were up-regulated 10-folds or greater in the MSLC sample relative to the SFC sample were unknown or predicted proteins. Transcription of the oryzin gene was only slightly up-regulated in the MSLC sample while transcription of the α-amylase gene was slightly down-regulated. On the other hand, when DPY medium was used, many known genes including the oryzin gene were up-regulated in the MSLC sample versus the SFC sample.
出版物タイトル	Memoirs of the Faculty of Engineering, Okayama University
発行日	2010-01
巻	44巻
開始ページ	73
終了ページ	83
ISSN	1349-6115
言語	英語
論文のバージョン	publisher
NAID	120002309053

Ecient Squaring Algorithm for Xate Pairing with Freeman Curve

JaLCDOI	10.18926/19961
フルテキストURL	Mem_Fac_Eng_OU_44_69.pdf
著者	Nekado, Kenta\| Kato, Hidehiro\| Nogami, Yasuyuki\| Morikawa, Yoshitaka\|
抄録	Recently, pairing–based cryptographies have attracted much attention. For fast pairing calculation, not only pairing algorithms but also arithmetic operations in extension field should be efficient. Especially for final exponentiation included in pairing calculation, squaring is more important than multiplication. This paper proposes an efficient squaring algorithm in extension field for Freeman curve.
出版物タイトル	Memoirs of the Faculty of Engineering, Okayama University
発行日	2010-01
巻	44巻
開始ページ	69
終了ページ	72
ISSN	1349-6115
言語	英語
論文のバージョン	publisher
NAID	120002309070

Ordinary Pairing Friendly Curve of Embedding Degree 3 Whose Order Has Two Large Prime Factors

JaLCDOI	10.18926/19960
フルテキストURL	Mem_Fac_Eng_OU_44_60.pdf
著者	Nogami, Yasuyuki\| Morikawa, Yoshitaka\|
抄録	This paper proposes a method for generating a certain composite order ordinary pairing–friendly elliptic curve of embedding degree 3. In detail, the order has two large prime factors such as the modulus of RSA cryptography. The method is based on the property that the order of the target pairing–friendly curve is given by a polynomial as r(X) of degree 2 with respect to the integer variable X. When the bit size of the prime factors is about 500 bits, the proposed method averagely takes about 15 minutes on Core 2 Quad (2.66Hz) for generating one.
出版物タイトル	Memoirs of the Faculty of Engineering, Okayama University
発行日	2010-01
巻	44巻
開始ページ	60
終了ページ	68
ISSN	1349-6115
言語	英語
論文のバージョン	publisher
NAID	120002309063

Improved Multistage Learning for Multibody Motion Segmentation

JaLCDOI	10.18926/19956
フルテキストURL	Mem_Fac_Eng_OU_44_24.pdf
著者	金谷健一\| Sugaya Yasuyuki\|
抄録	We present an improved version of the MSL method of Sugaya and Kanatani for multibody motion segmentation. We replace their initial segmentation based on heuristic clustering by an analytical computation based on GPCA, fitting two 2-D affine spaces in 3-D by the Taubin method. This initial segmentation alone can segment most of the motions in natural scenes fairly correctly, and the result is successively optimized by the EM algorithm in 3-D, 5-D, and 7-D. Using simulated and real videos, we demonstrate that our method outperforms the previous MSL and other existing methods. We also illustrate its mechanism by our visualization technique.
出版物タイトル	Memoirs of the Faculty of Engineering, Okayama University
発行日	2010-01
巻	44巻
開始ページ	24
終了ページ	31
ISSN	1349-6115
言語	英語
論文のバージョン	publisher
NAID	120002309159

Numerical Simulation of Acoustic Waves in a Two-Dimensional Phononic Crystal: Negative Refraction

JaLCDOI	10.18926/19954
フルテキストURL	Mem_Fac_Eng_OU_44_7.pdf
著者	Maetani Noriaki\| Kurose Tomoyuki\| 鶴田健二\|
抄録	The lens effect of acoustic waves in a two-dimensional (2D) phononic crystal is studied by numerical simulation based on the finite-difference time-domain (FDTD) method. We calculate the phonon band structure of 2D phononic crystals, consisting of metal cylinders placed periodically in water. Lens effect is observed by the negative refraction of acoustic waves, which results in refocusing of the waves at the point outside the crystal. To increase the focal intensity, we introduce a 2D phononic crystal shield with a different composition of material, which returns the incident waves back to the lens via the perfect reflection. Also, the dependence on filling fraction of metal in the crystal is studied.
出版物タイトル	Memoirs of the Faculty of Engineering, Okayama University
発行日	2010-01
巻	44巻
開始ページ	7
終了ページ	12
ISSN	1349-6115
言語	英語
論文のバージョン	publisher
NAID	120002309019

FDTD Analysis on Optical Connement Structurewith Electromagnetic Metamaterial

JaLCDOI	10.18926/19953
フルテキストURL	Mem_Fac_Eng_OU_44_1.pdf
著者	Nagai Shinji\| Umeda Ryosuke\| 鶴田健二\|
抄録	In this paper, we investigate a light-confinement phenomenon in the structure which has triangular latice composed of Double NeGative Metamaterial (DNGM). In geometrical optics consideration, this structure is expected to confine lights completely by sequential refractions in the structure. We demonstrate it by using the two dimensional finite-difference time-domain simulations. We introduce Drude-Lorentz model for dielectric and magnetic dispersion of the material at optical frequencies. We analyze quantitatively the effects of energy loss in the DNGM on the light-confinement efficiency.
出版物タイトル	Memoirs of the Faculty of Engineering, Okayama University
発行日	2010-01
巻	44巻
開始ページ	1
終了ページ	6
ISSN	1349-6115
言語	英語
論文のバージョン	publisher
NAID	120002309117

Provenance of Early Cretaceous Hayama Formation, Okayama Prefecture, Inner Zone of Southwest Japan: constraints from modal mineralogy and mineral chemistry of derived detrital grains

JaLCDOI	10.18926/ESR/19850
タイトル（別表記）	岡山県に分布する白亜紀前期羽山層砕屑物質の供給源：砕屑粒の鉱物化学組成とモード組成から導かれる制約
フルテキストURL	016_029_042.pdf
著者	アシードダニエル\| 鈴木茂之\| 柴田次夫\|
抄録	Petrographic and phase chemistry studies of detrital grains were carried out on sandstones from the Lower Cretaceous Hayama Formation, Inner Zone of Southwest Japan, to determine their provenance and the tectonic setting during the early Cretaceous. The results of the modal mineralogy suggest that the Hayama Formation has magmatic arc provenance and that deposition of the sediments took place in the back-arc areas with detritus mostly derived from the magmatic arc and rifted continental margins. The chemical compositions of chromian spinel, chlorite and sphene indicate that significant proportions of the detrital grains were derived from mafic and/or ultramafic sources. The source areas are the mafic and ophiolitic rocks in the Sangun-Renge and Akiyoshi terranes and the felsic volcanic rocks probably from either the Akiyoshi terrane or a source not presently exposed in southwest Japan. However, minor amounts of the detritus were derived from the basement rocks; i.e., carbonates and siliciclastic rocks of the Akiyoshi terrane and the metamorphosed mafic rocks of the Chizu terrane.
キーワード	modal analysis sandstone mineral chemistry provenance Hayama Formation
出版物タイトル	Okayama University Earth Science Report
発行日	2009-12-25
巻	16巻
号	1号
開始ページ	29
終了ページ	42
ISSN	1340-7414
言語	英語
著作権者	岡山大学地球科学研究報告編集委員会
論文のバージョン	publisher
NAID	120002309000

Sr–Nd isotopic compositions of Paleoproterozoic metavolcanic rocks from the southern Ashanti volcanic belt, Ghana

JaLCDOI	10.18926/ESR/19849
タイトル（別表記）	ガーナ，アシャンティ火山帯南部に分布する古原生代変火山岩類のSr-Nd 同位体組成
フルテキストURL	016_009_028.pdf
著者	ダムパリサムエル\| 柴田次夫\| アシードダニエル\| 岡野修\| マーヌジョンソン\| サチパトリック\|
抄録	Neodymium (Nd) and strontium (Sr) isotopic data are presented for Paleoproterozoic metavolcanic rocks in the southern part of the Ashanti volcanic belt of Ghana. The metavolcanic rocks are predominantly basalts/basaltic andesites and andesites with minor dacites. Two types of basalts/basaltic andesites (B/A), Type I and Type II, have been identified. The Type I B/A are stratigraphically overlain by the Type II B/A, followed by the andesites and the dacites. The analyzed volcanic rocks commonly have low initial (87)Sr/(86)Sr ratios consistent with previous studies on Paleoproterozoic rocks from the West African craton. The LREE-depleted, tholeiitic Type I B/A exhibit back-arc basin geochemical signatures and show high positive epsilon Nd (i.e., ε(Nd) (2.1 Ga) = +3.89 to +7.21), which suggest a long term depleted source and also indicate that they were produced in an entirely oceanic environment devoid of influence of continental crust. The isotope signatures are thus consistent with the previously published trace element data of the Type I basalts/basaltic andesites in suggesting that their parent magma was generated from a depleted mantle. The Type I B/A have Nd model ages (T(DM2)) of 1.83–2.09 Ga similar to their formation ages, suggesting that they were juvenile at their time of formation. The andesites and the Type II B/A andesites show LREE-enriched patterns and exhibit characteristics of subduction zone-related magmas, and show initial ε(Nd) (2.1Ga) values of –1.15 to + 1.35 and Nd model ages (T(DM2)) of 2.32–2.58 Ga. The LREE-enriched dacitic porphyry also exhibits characteristics of subduction zone-related magmas, and have initial ε(Nd) (2.1Ga) value of –2.24 and Nd model ages (T(DM2)) of 2.64 Ga. The Nd isotopic data confirms the juvenile character of the Birimian crust, but also suggests some contributions of a pre-Birimian crustal material (or Archean?) in the genesis of some of the metavolcanic rocks. Our isotopic result is consistent with the island arc complex model which views Paleoproteozoic terranes of West Africa in the context of subduction–accretion processes.
キーワード	Sr–Nd isotopes petrogenesis tectonic setting Birimian metavolcanics Ashanti volcanic belt
出版物タイトル	Okayama University Earth Science Report
発行日	2009-12-25
巻	16巻
号	1号
開始ページ	9
終了ページ	28
ISSN	1340-7414
言語	英語
著作権者	岡山大学地球科学研究報告編集委員会
論文のバージョン	publisher
NAID	120002308985

日本最初の用語「地質学」の成立: 箕作阮甫（1799-1863）の貢献

JaLCDOI	10.18926/ESR/19848
タイトル（別表記）	The first Japanese word "chishitsu-gaku" for the "geology" was proposed by Genpo Mitsukuri (1799-1863)
フルテキストURL	016_001_007.pdf
著者	岡田博有\| 鈴木茂之\|
抄録	The first Japanese word "chishitsu-gaku" for the "geology" was proposed by Genpo Mitsukuri, a scientific contributor in the Tokugawa regime in the 19th century, who was born in 1799 in Tsuyama in Western Honshu, Japan and had worked for scientific activities of the Tokugawa government from 1839 to 1863. His major works for the first making of the "chishitsu-gaku" for the "geology" have been presented in this paper, also showing his contribution to Japanese sciences.
キーワード	Genpo Mitsukuri "chishitsu-gaku" 19th century
出版物タイトル	Okayama University Earth Science Report
発行日	2009-12-25
巻	16巻
号	1号
開始ページ	1
終了ページ	7
ISSN	1340-7414
言語	日本語
著作権者	岡山大学地球科学研究報告編集委員会
論文のバージョン	publisher
NAID	120002309076

流行性肝炎に於ける血清蛋白代謝に関する研究第二編流行性肝炎に於ける血清蛋白像及び各種血清膠質反応と血清蛋白像との関係に就いての研究

著者	藤岡由五\|
発行日	1956-11-30
出版物タイトル	岡山医学会雑誌
巻	68巻
号	11号
資料タイプ	学術雑誌論文

流行性肝炎に於ける血清蛋白代謝に関する研究第一編流行性肝炎に於けるケファリン・コレステロール絮状反応に関する研究

著者	藤岡由五\|
発行日	1956-11-30
出版物タイトル	岡山医学会雑誌
巻	68巻
号	11号
資料タイプ	学術雑誌論文

香川県下における「馬宿病」の媒介体に関する研究第一篇「馬宿病」の発生地方を中心に採集した恙虫の分類について

著者	小野吉昭\|
発行日	1956-09-30
出版物タイトル	岡山医学会雑誌
巻	68巻
号	9号
資料タイプ	学術雑誌論文

末梢動脈の慢性閉塞性疾患の治療－変りつつある適応－

JaLCDOI	10.18926/19767
タイトル（別表記）	Changing conception of indication for peripheral arterial reconstruction surgery.
フルテキストURL	059_054_061.pdf
著者	古元嘉昭\| 中尾俊彦\| 砂川満\| 矢木信子\| 萬秀憲\|
抄録	末梢動脈の慢性閉塞性疾患に対する直達血行再建術の長期の予後は必ずしも満足できるものではない。合成代用血管は，長期の植え込みにより内被の肥厚，退行性変性，および材質の変性の様な合併症により，特に小口径の合成代用血管の適応は極めて限られたものになっている。一方，医用質量分析装置を用いた虚血肢の実験的研究によると，自由に運動させた犬の虚血肢では，急性期に比較すると3カ月以後その組織循環は有意に増加することが明らかとなった。また，家兎を用いた実験的研究によると，炭酸泉浴に高濃度のラドン吸入を合併すると皮下組織の組織循環が約30％増加して，同時に皮下の酸素分圧が上昇することを確かめた。従って，切迫壊死の症例をのぞいて，末梢動脈の慢性閉塞性疾患々肢，特に間欠性跛行に対しては，自然予後を考慮して歩行負荷，および炭酸泉，ラドン泉の温泉療法を用いた保存的療法が長期の予後上効果的である。
キーワード	虚血肢 (lshemic limb) 末梢血行再建術 (Peripheral arterial reconstruction) 組織循環 (Tissue perfusion) 歩行運動 (Walking exercise) 温泉療法 (Balneotherapy)
出版物タイトル	環境病態研報告
発行日	1988-08
巻	59巻
開始ページ	54
終了ページ	61
ISSN	09133771
言語	日本語
論文のバージョン	publisher
NAID	120002309045

Chloride反応による布および紙に附着する血痕等の陳旧度判定ならびに紙および木に附着する潜在指紋の検出第Ⅱ編 Chloride反応による紙および木に附着する潜在指紋の検出

著者	来仙隆\|
発行日	1956-08-31
出版物タイトル	岡山医学会雑誌
巻	68巻
号	8号
資料タイプ	学術雑誌論文

Effects of Image and Layered Structure on Web Search Performance -Evaluation on the Basis of Movement Distance of Mouse Pointer-

著者	村田厚生\| 森若誠\| 早見武人\| Takahashi Rina\|
発行日	2009-11-12
出版物タイトル	Proceedings : Fifth International Workshop on Computational Intelligence & Applications
巻	2009巻
号	1号
資料タイプ	会議発表論文

Comparison of Performance among Different Situations of Operation in Web Display - Comparison of Behavioral Features between Young and Older Adults -

著者	村田厚生\| 森若誠\| Takahashi Rina\|
発行日	2009-11-12
出版物タイトル	Proceedings : Fifth International Workshop on Computational Intelligence & Applications
巻	2009巻
号	1号
資料タイプ	会議発表論文

Development of Thumb-Operated Dial-Type Integrated Switch for Automobile and its Effectiveness

著者	村田厚生\| 森若誠\| Wang Shuguang\|
発行日	2009-11-12
出版物タイトル	Proceedings : Fifth International Workshop on Computational Intelligence & Applications
巻	2009巻
号	1号
資料タイプ	会議発表論文

都市地域整備と環境共生―岡山県における事例研究

JaLCDOI	10.18926/fest/19732
タイトル（別表記）	Environmental Symbiosis in Urban ane Regional Infrastructure Improvement -Some Examples in Okayama Region
フルテキストURL	004_101_118.pdf
著者	井上博司\|
出版物タイトル	岡山大学環境理工学部研究報告
発行日	1999-02-26
巻	4巻
号	1号
開始ページ	101
終了ページ	118
ISSN	1341-9099
言語	日本語
論文のバージョン	publisher
NAID	120002309200

Fundamental study for constructing a system to assist the left visual field of older drivers - Effectiveness of the alternative of the left front side-view mirror by the central visual field -

著者	村田厚生\| 内田洋平\| 森若誠\|
発行日	2009-11-12
出版物タイトル	Proceedings : Fifth International Workshop on Computational Intelligence & Applications
巻	2009巻
号	1号
資料タイプ	会議発表論文

Dynamic Behavior of Bed Material around Bridge Pier under Abrupt Change of Water Pressure

JaLCDOI	10.18926/fest/19729
フルテキストURL	004_093_100..pdf
著者	名合宏之\| Mia Faruque\|
抄録	Major failure of structures usually occurs during flood flows due to scourin, sinking and sliding. These types of failure are considered to be in close relation to the dynamic behavior of bed material around the structures. Failure of bridges due to the phenomenon of scouring around piers is a common, natural problem of river hydraulics. Experiments were carried out to investigate the characteristics of pore water pressure and effective stresses in the bed material around a circular bridge pier under abrupt change of water pressure. A laboratory model was used to clarify the effect of the variation of water pressure to determine the mechanism of the collapse of circular bridge pier during flood or storm waves. The experimental results showed that the bed material under suddeen change in drop of water pressure near the pier was weakenend by an increase in excess pore pressure, followed by a considerable quick removal of bed material.
キーワード	Pore pressure Effective stress Abrupt water pressure change Scour Bridge pier
出版物タイトル	岡山大学環境理工学部研究報告
発行日	1999-02-26
巻	4巻
号	1号
開始ページ	93
終了ページ	100
ISSN	1341-9099
言語	英語
論文のバージョン	publisher
NAID	120002309116