検索結果 35246 件
| 著者 | 嶋村 浩一| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| 著者 | 辻 耕造| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| JaLCDOI | 10.18926/fest/11543 |
|---|---|
| タイトル（別表記） | Fertilizer Microencapsulated with Biodegradable Polymer |
| フルテキストURL | 007_127_131.pdf |
| 著者 | 二木 栄| 吉澤 秀和| 松尾 充記| 楠本 昌彦| 北村 吉朗| |
| 抄録 | Many fertilizers are soluble in water, therefore their effect does not last for long time after fertilizing in soils. The nitrogenous fertilizers such as urea transported to groundwater cause serious agricultural contamination and health problems. To solve these problems, sustained release of fertilizer has attracted much attention. In this study, we attempted to prepare polylactide microcapsules with fertilizer by phase separation technique, which was a method of microencapsulation. Polylactide (PLA) was used as a biodegradable polymer bacause the biodegradable polymer has no influence on the soil and the ecosystem. The effect of preparation conditions such as stirring time and fertilizer concentration on morphology of microcapsule and on cumulative percentage released of enclosed urea was also investigated. |
| キーワード | fertilizer polylactide microcapsule controlled release phase separation |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 127 |
| 終了ページ | 131 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313894 |
| JaLCDOI | 10.18926/fest/11542 |
|---|---|
| タイトル（別表記） | Preparation and In Vitro Release Property of PLA Microspheres Enclosing Antitumor Agent |
| フルテキストURL | 006_103_106.pdf |
| 著者 | 西野 悟| 吉澤 秀和| 夏越 祥次| 愛甲 孝| 幡手 泰雄| 北村 吉朗| |
| 抄録 | Recently, many antitumor agents developed. Irinotecan hycrochloride (CPT) has a great side effect even though it is well effective against the cancer. Drug delivery system (DDS) medicine indicates that the release rate of medicine is constant for a long time. Therefore, in order to materialize the general idea of DDS, we applied microencapsulation technique to prepare biodegradable polymer microspheres (MS) enclosing antitumor drug having no side effect. Polylactide microparticles enclosing antitumor agent were prepared by solvent evaporation method under various operation conditions. The effects of operation parameter on release rate of drug and morphology of microparticles were studied. |
| キーワード | DDS microparticle polylactide antitumor agent solvent evaporation DSC |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 103 |
| 終了ページ | 106 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002314051 |
| JaLCDOI | 10.18926/fest/11541 |
|---|---|
| タイトル（別表記） | Upconversion property and light scattering in Tm(3+)-doped glass-ceramics |
| フルテキストURL | 007_119_125.pdf |
| 著者 | 三浦 嘉也| 丁 勇| 村田 隆| 姫井 裕助| 難波 徳郎| |
| 抄録 | Glass-ceramics containing Pb(x)Cd(1-x)F(2) microcrystallites were prepared through heat treatment of Tm(3+)/Yb(3+)doped SiO(2)-Al(2)O(3)-PbF(2) glasses. The crystallite size was controlled by varying the heat-treatment time. By changing glass composition, two types of strong optical scattering, Rayleigh and Mie scattering modes were observed for the glass ceramics. In the case of Rayleigh scattering, the scattering region expanded to the long-wavelength side with increasing the heat-treatment time. On the other hand, in the case of Mie scattering, the region were hardly dependent on wavelength, and visible light was widely scattered. It was argued that the different scattering phenomena were caused by the different size of the crystallites or their morphogical texture. Furthermore, the glass-ceramics with strong optical scattering showed higher upconversion fluorescence intensity than the matrix glass. The mechanisms for the enhanced upconversion due to the scattering were discussed. |
| キーワード | Optical scattering Glass-ceramics Oxyfluoride glass Microcrystallite Upconversion fluorescence |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 119 |
| 終了ページ | 125 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313480 |
| JaLCDOI | 10.18926/fest/11540 |
|---|---|
| タイトル（別表記） | Formation of Crosslinked Polyurea Membrane by Phase Separation Method |
| フルテキストURL | 006_099_102.pdf |
| 著者 | 小林 栄次| 吉澤 秀和| Jacobson Joseph| 北村 吉朗| |
| 抄録 | This research was conducted to clarify the membrane formation mechanism of crosslinked polyurea microcapsules by phase separation method, specially the role of polymeric surfactant of poly(ethylene-alt-maleic anhydride),(poly(E-MA))at the interface of O/W emulsion. Because of its toxicity, alternative chemicals should be chosen. This understanding may make possible to find the alternative chemicals. It was found that poly(E-MA)was necessary for the formation of crosslinked polyurea membrane. The addition of sodium dodecyl sulfate (SDS) prohibited the membrane formation reaction at the interface, even in the care of poly(E-MA) concentration enough for polymeric microcapsule formation. From the results in this study, poly(E-MA) as polymeric surfactant was found to be adsorbed on the interface of O/W emulsion and provide the reaction site for the membrane formation of polymeric microcapsules. |
| キーワード | microcapsulation O/W emulsion polyurea polymeric surfactant |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 99 |
| 終了ページ | 102 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313844 |
| JaLCDOI | 10.18926/fest/11539 |
|---|---|
| タイトル（別表記） | One-dimensional Compression Tests of Sludge Cake from Dredged Sludge |
| フルテキストURL | 006_085_097.pdf |
| 著者 | 脇谷 芳招| 藤井 弘章| 西村 伸一| 井上 隆司| |
| 抄録 | One-dimensional compression tests were performed to investigate compression characteristics of sludge cake used as a construction material. The sludge cake is dewatering product of dredged sludge from the bottom of a lake. The test results show following compression characteristics. (1) For the undisturbed samples, e-log p curves show compressibility of overconsolidated clay ordinatily observed. (2) For the disturbed samples, there observed compressibility close to that of ordinary normally consolidated clay. (3) For the recompressed samples, there observed two turning points on e-log p curve. The compression presures(p(c1) and p(c2)) at those points for the unsubmerged tests have a linear correlation with the recompression pressure(p(s)). The submerged tests give very small values of p(c1) and p(c2) compared with the case of unsubmerged test. (4) For the recompressed samples, the first compression index(C(c1)) after p(c) has a linear correlation with the initial void ratio(e(0)), and the second compression index(C(c2)) shows almost constant value. |
| キーワード | sludge cake one-dimensional compression test e～log p curve compression index void ratio |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 85 |
| 終了ページ | 97 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313853 |
| JaLCDOI | 10.18926/fest/11538 |
|---|---|
| タイトル（別表記） | Effects of ultrasonic treatment on the preparation of transparent glass-ceramic phosphor |
| フルテキストURL | 007_113_118.pdf |
| 著者 | 井上 輝英| 中島 瑞穂| 難波 徳郎| 三浦 嘉也| |
| 抄録 | The effects of ultrasonic surface treatment (UST) on the crystallization behavior and optical emission properties were investigated for the transparent glass-ceramics prepared from calcium aluminosilicate glasses co-doped with Eu(2+), Nd(3+). The glass-ceramics A were prepared by sintering a glass 45CaO・45Al(2)O(3)・10SiO(2) (mol%) containing 0.5Eu(2)O(3)+1Nd(2)O(3) under a 2% H(2)+98% Ar reducing atmosphere. In the glass-ceramics A, three crystalline phases, CaAl(2)O(4) (CA), CaAl(4)O(7) (CA2) and Ca(2)Al(2)SiO(7) (CAS) were commonly confirmed by X-ray diffraction. No drastic change in the amount of the precipitated crystalline phases was observed even in the case using UST of CA powders. It was suggested that the optical emission properties of the glass-ceramics A was responsible for the CA2 crystals. The glass-ceramics B were also prepared from a 51CaO・42Al(2)O(3)・7SiO(2) glass. The CA crystals were separately precipitated in the glass-ceramics B. In particular, a large amount of CA was successfully produced by stirring the UST suspension to prevent the sedimentation of the UST particles. The glass-ceramic B so-prepared showed strong photoluminescence but weak phosphorescence compared with other glass-ceramics B, indicating that the photoluminescence and phosphorescence were originated in different electron-trapping levels. The amount of the trap levels associated with the long lasting phosphorescence, such as oxygen vacancies, was probably small in the glass-ceramic B prepared with the stirring UST. |
| キーワード | ultrasonic surface treatment (UST) surface crystallization glass-ceramics long lasting phosphorescence calcium aluminosilicate glass |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 113 |
| 終了ページ | 118 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313433 |
| JaLCDOI | 10.18926/fest/11537 |
|---|---|
| タイトル（別表記） | Long-term Change Trend of Climate at Aomori City |
| フルテキストURL | 006_081_084.pdf |
| 著者 | 諸泉 利嗣| 佐藤 裕一| 佐藤 幸一| 三浦 健志| |
| 抄録 | Characteristics of long-term change for air temperature, precipitation and snowfall-depth at Aomori city were analyzed with data during the 111 years, from 1886 to 1996. The typical results were as follows: (1) The increasing rate of the annual mean air temperature was 1.07℃/111 year. (2) The increasing rate of the monthly minimum air temperature was larger than that of the monthly maximum air temperature. (3) The increasing rate of the monthly air temperature was large from winter to spring, however, was not so from summer to autumn. (4) The decreasing rate of annual precipitation was 0.187 mm/year. (5) The 5-year moving average of annual snowfall-depth might indicate the existence of about 10-year period. |
| キーワード | Air temperature precipitation snowfall-depth long-term change Aomori city |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 81 |
| 終了ページ | 84 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313378 |
| JaLCDOI | 10.18926/fest/11536 |
|---|---|
| タイトル（別表記） | Long-term Trend of Rainfall at Tsudaka Farm of Okayama University |
| フルテキストURL | 007_107_111.pdf |
| 著者 | 諸泉 利嗣| 四方田 穆| 三浦 健志| |
| 抄録 | Characteristics of long-term change in rainfall at Tsudaka Farm of Okayama University were analyzed with data during the 20 years, from 1979 to 1998. The typical results were as follows: (1) The average of annual rainfall was 1203 mm at average, 1726 mm at maximum, and 666 mm at minimum. (2) The decreasing rate of the annual rainfall was 5.37 mm/year. (3) Trend of rainfall intensity in each rainfall duration showed an increase of which rate were 0.005~0.256 mm/h/year, contrary to the annual trend. (4) Rainfall intensities in n-years probability were estimated using the maximum rainfall intensity for each rainfall duration. |
| キーワード | Rainfall Rainfall intensity Rainfall duration Talbot formula Long-term trend Tsudaka Farm of Okayama University |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 107 |
| 終了ページ | 111 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313813 |
| JaLCDOI | 10.18926/fest/11533 |
|---|---|
| タイトル（別表記） | Management of Rural Region in Association with Its Regionality of the Western Part of Tottori Prefecture |
| フルテキストURL | 006_053_065.pdf |
| 著者 | 市南 文一| |
| 抄録 | In this paper the brief history, the status quo and the problem of regional management in association with its regionality were examined in Yodoe town and Mizokuchi town in the western part of Tottori Prefecture. These areas have the focus of Yonago city. Mt. Daisen and Kaike-spring have been well-known, and Tottori Flower Park recently attracts many tourists. However, agriculture also flourishes remarkably in these areas. Although Yodoe town has been celebrated for the waters and traditional umbrella, the town management recently makes the most of acorn and ancient tombs, giving emphasis to international relations and history. In Mizokuchi town the oldest legend of ogre has been investigated intently and the town management in connection with it has been proceeded. As these plannings use their histories and features peculiar to the area as a management concept, they have high originality. As a future problem, it may be necessary to built up a closer connection and coordinate each regional functions within the extensive areas. |
| キーワード | The Western Part of Tottori Prefecture Rural Area Regionality Regional Coordination of Functions |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 53 |
| 終了ページ | 65 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002314021 |
| JaLCDOI | 10.18926/fest/11530 |
|---|---|
| タイトル（別表記） | Tendency of Main Sightseeing-areas based on the Number of Tourists for Some 30 Years in Okayama Prefecture |
| フルテキストURL | 007_075_089.pdf |
| 著者 | 市南 文一| |
| 抄録 | In this paper, the tendency of the number of tourists was examined for some 30 years at several sightseeing-areas in Okayama prefecture. Recently, large-scale parks on well-known theme have been built in Japan, the management strategy of sightseeing-spots is becoming harder. However, it is important for us to understand the peculiarity of local sightseeing-areas and advertise the information on unsophisticated nature and culture linked with surrounding ecological system consistently. Sustainable management of sightseeing-areas is affected and sustained by the thought and life-style of peoples living in the adjacent areas. |
| キーワード | Tourists Sightseeing-areas Sustainable Management Okayama Prefecture |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 75 |
| 終了ページ | 89 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313698 |
| JaLCDOI | 10.18926/fest/11528 |
|---|---|
| タイトル（別表記） | Damage factors analysis for small embankment dams due to the Hyogoken-Nambu earthquake special to Hokudan Town |
| フルテキストURL | 007_055_074.pdf |
| 著者 | 藤井 弘章| 国政 華奈| 難波 明代| 横溝 隆之| 西村 伸一| 島田 清| 堀 俊男| 西山 竜朗| 脇谷 芳招| |
| 抄録 | This study was performed to clarify which factors affected damage to take-ike (small embankment dams for irrigation in Japanese) of Hokudan Town on Awaji Island in western Japan due to Hyogoken-Nambu earthquake. Multivariate and ordinary statistical analysis were carried out using documentary data (181 damaged and 328 undamaged dams), and ordinary one was done for the results investigated in situ. The model for the multivariate analysis was created with 13 items and 94 categories for 4 groups (Location, Geology Structure, and History of Dam). As a result, the factors causing to damage for dam are (1) the nearest fault (Nojima, Mizukoshi and D2), (2) embankment volume (the larger the more), (3) angle of crest axis to epicenter (diagonal and normal), (4) distance to the nearest fault (less than 500 m), (5) distance to the epicenter (8 to 14 km which almost agree to the location of seismic intensity 7 JMA), (6) play view of dam axis (3 or 4 axes), (7) angle of crest axis to nearest fault (diagonal and normal), (8) elevation of dam site (over 100 m), (9) surface geology of dam site (non-cohesive soil), (10) era of construction (prior to 1891), and (11) soil properties of embankment (constructed of sand, smaller penetration resistance). |
| キーワード | Earth dam earthquake damage site investigation statistical analysis case study |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 55 |
| 終了ページ | 74 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002314039 |
| JaLCDOI | 10.18926/fest/11527 |
|---|---|
| タイトル（別表記） | Random Bit Strings and Antigenic Diversity ― Simulations |
| フルテキストURL | 006_035_039.pdf |
| 著者 | 佐々木 徹| |
| 抄録 | Transition of random bit strings is simulated by using pseudorandom numbers. Bit strings are considered as RNA of HIV virus here. Transition of random bit strings represents that of antigenic deversity. |
| キーワード | random bit string simulation of errors in RNA transcription antigenic diversity |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 35 |
| 終了ページ | 39 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313453 |
| JaLCDOI | 10.18926/fest/11525 |
|---|---|
| タイトル（別表記） | A Study on Influence of Current Velocity on Phytoplankton |
| フルテキストURL | 007_045_053.pdf |
| 著者 | 季 勁松| 河原 長美| 小野 芳朗| |
| 抄録 | The main problems caused by eutrophication result from the increase of phytoplankton. Therefore, controlling the increase of phytoplankton is the most important. In this study, we discuss the influence of current velocity on the growth of phytoplankton based on the field experiments and laboratory experiments. The laboratory experiments for the influence of current velocity on the growth have been conducted using circular channels, and the field experiments were conducted using a shallow pond. The results of the experiments show current velocity inhibits the growth of phytoplankton. |
| キーワード | Eutrophication growth of phytoplankton influence of current velocity experiment |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 45 |
| 終了ページ | 53 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313529 |
| JaLCDOI | 10.18926/fest/11524 |
|---|---|
| タイトル（別表記） | Speeds of travelling wave solutions in a mathematical model of some infectious disease in predator-prey system |
| フルテキストURL | 006_017_023.pdf |
| 著者 | 梶原 毅| 沖田 知毅| |
| 抄録 | In this paper we construct a simple mathematical model for infectious disease in a pradator-prey system, and study the speeds of travelling wave solutions of this model. We present a method of estimation of speeds and make a numerical study about this matter. |
| キーワード | Travelling wave Infectious disease |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 17 |
| 終了ページ | 23 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313731 |
| 著者 | 長谷川 浩一| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| 著者 | 近森 研一| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| 著者 | 上原 慎也| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| JaLCDOI | 10.18926/fest/11515 |
|---|---|
| タイトル（別表記） | Stability analysis of mathematical models of infectious disease |
| フルテキストURL | 007_017_021.pdf |
| 著者 | 村瀬 晶子| 佐々木 徹| 梶原 毅| |
| 抄録 | Dynamics of infectious disease in vivo is described by coupled differential equations. Stability analysis of the complicated systems is difficult without computer calculation, while stability analysis is, in general, important to investigate qualitative behaviour of models. Liu analyzes stability of systems describing HIV dynamics in vivo with a symbolic calculation software. The same method is used for stability analysis of a mathematical model of malaria. |
| キーワード | mathematical model infectious disease dynamics in vivo stability analysis symbolic calculation |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 17 |
| 終了ページ | 21 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313783 |