JaLCDOI 10.18926/fest/11514
Title Alternative Preparation of Biodegradable Polymer Microcapsules Enclosing Anti-mite Agent
FullText URL 008_103_106.pdf
Author Minobe, Kouichi| Yoshizawa, Hidekazu| Kitamura, Yoshiro|
Abstract Many kinds of mite was caused by allergy and sick house syndrome, so it has become one of the social problems. Farnesyl acetone is one of the most potent anti-mite agent. However the vapor pressure of farnesyl acetone is high even at room temperature. This indicates the anti-mite effect has not been sustained even though the agent has strong anti-mite effect. In this study, we attempted to prepare polylactide microcapsule with farnesyl acetone for the purpose of sustainable dosage form of anti-mite agent. Microcapsule was prepared by solvent evaporation, which was a method of microencapsulation. The effects of preparation conditions on the enclosing efficiency, the release of microcapsule and anti-mite effect of microcapsule were investigated.
Keywords farnesyl acetone anti-mite effect polylactide microcapsule solvent evaporation
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 103
End Page 106
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002314003
JaLCDOI 10.18926/fest/11513
Title Alternative Decontamination of Waste-water by Metal Phthalocyanines Encapsulated in Polymeric Microcapsules
FullText URL 008_097_101.pdf
Author Takami, Koji| Yoshizawa, Hidekazu| Sakata, Isao| Kitamura, Yoshiro|
Abstract Polymeric microcapsules encapsulating iron phthalocyanine (Fe-Pc) and zinc phthalocyanine (Zn-Pc) were successfully prepared in this study. Absorption spectra of polymeric microcapsules encapsulating metal phthalocyanines were measured in visible light range. It was expected from the results that the polymeric microcapsules encapsulating metal phthalocyanines showed high photocatalytic activity upon irradiation with visible light such as sunlight. The catalytic and phtocatalytic activities of encapsulated Fe-Pc and Zn-Pc were investigated in the decomposition of methylene blue in water. The encapsulatedd Fe-Pc with H(2)O(2) exhibited a high catalytic activity. Methlene blue was efficiently decomposed by interaction of Fe-Pc with H(2)O(2).
Keywords microcapsule decomposition metal phthalocyanine waste-water treatment suspension polymerizatio
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 97
End Page 101
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313830
JaLCDOI 10.18926/fest/11511
FullText URL 008_093_096.pdf
Author Nagamine, Shinsuke| Takahashi Shinsuke| Sasaoka, Eiji|
Abstract Nanoporous TiO(2) were synthesized via hydrolysis of titanium tetraisopropoxide (TTIP) in HCl acidic conditions using sodium dodecylsulfate (SDS) as a templating agent. The order of the nanostructure of samples before calcination was improved with increasing the SDS/TTIP molar ratio. The calcined samples presented uniform mesopore structure with the average diameter of 4-5 nm and considerably large surface areas over 200m(2)/g, although the periodicity of the nanostructure was exceedingly reduced by the removal of the template. The prepared TiO(2) exhibited exceedingly higher activities on the catalytic oxidation of benzene compared to the commercial TiO(2), probably due to the difference of their pore suructures.
Keywords template titania lamellar nanostructure nanopore structure catalyst
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 93
End Page 96
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313373
JaLCDOI 10.18926/fest/11509
Title Alternative The Outline of Totaling Result of The Class Evaluation Questionnaire by Students in 2001
FullText URL 008_087_092.pdf
Author Oki, Yoko|
Abstract The committee of academic affairs of the Faculty of Environmental Science and Technology in 2001 planned and carried out "the class evaluation questionnaire survey by students" with original one. The committee has announced the totaling result of this survey, especially concerning both of the class evaluation and the self-estimation of student by themselves, in this paper. It is expected that these contents become the aid of the class improvement in near future.
Keywords The class evaluation questionnaire students 2001 committee of academic affairs outline of totaling result
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 87
End Page 92
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313803
JaLCDOI 10.18926/fest/11507
Title Alternative Survey on Spatial Variability of Surface Soil Moisture and Soil Physical Properties in a Sloping Grassland Field
FullText URL 008_081_085.pdf
Author Moroizumi, Toshitsugu|
Abstract Spatial variability of surface soil moisture, bulk density, satureted hydraulic conductivity, and penetration resistance (cone index) in a sloping grassland field were surveyed. The typical results were as follows: (1) The surface soil moisture and the bulk density were normally distributed at a significant level of 0.05. (2) The surface soil moistures were higher at low area than in high and slope area. The coefficients of variation were larger at slope area. (3) The coefficients of variation for bulk density were larger at slope area than in low area. (4) The distribution of saturated hydraulic conductivity can be considered to be log-normally distributed. (5) The cone index showed the normal distribution.
Keywords Spatial variability Surface soil moisture Bulk density Saturated hydraulic conductivity Cone index
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 81
End Page 85
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313346
JaLCDOI 10.18926/fest/11504
Title Alternative The Nature of Tsuyama Region based on Changing Chief Industries
FullText URL 008_063_079.pdf
Author Ichiminami, Fumikazu|
Abstract In this paper, the nature of Tsuyama region was explained in terms of several changing features such as agricultural, industrial, commercial, and sight-seeing activities. Also, short history of mining sulfide ore at Yanahara Town was described and the population change of surrounding area was analyzed. Although the vitality of agriculture in general has gradually fallen mainly due to the decrease of number of farm household, of the rate of full-time farm household, of the area of farmland, and of the harvested area of rice, tobacco, and Japanese radish, the production of black syobean and the rate of vegetables, etc. have increased. After the highway of Chugoku line was opened to traffic, the number of industrial parks and establishments suddenly increased in and around Tsuyama City and they employed many workers. Within the industries of Tsuyama City, manufactures of genaral and electrical machineries, equipment and supplies developed, but the ones of textile mill products, apparel and other finished products made from fabrics and similar materials declined. In sight-seeing, tourists of Yunogou spa have increased in a satisfactory. Population of the municipalities except Tsuyama City have decreased since 1970 and a number of large-sized stores have come to be located in the suburbs of Tsuyama City.
Keywords Tsuyama region Tsuyama City Agriculture Industrial Park Sight-seeing City
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 63
End Page 79
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313775
JaLCDOI 10.18926/fest/11503
FullText URL 008_053_062.pdf
Author A.M., Dewan| Nishigaki, Makoto| Komatsu, Mitsuru|
Abstract Flood becomes regular feature in riverrine Bangladesh. Every year, around 21 percent of land is flooded during monsoon season, however, in severe situation this figure shot up to more than 60 percent of total land. This paper is an attempt to analyze hydrological characteristics of two catastrophic events (1988 and 1998 flood) in the light of flood history in Bangladesh. The analysis demonstrates that the 1998 flood was more severe than the 1988 one. Moreover, the 1998 flood was also prolonged than the 1988 flood due to heavy rainfall inside and outside of the country. Finally, flood management issues in Bangladesh have been analyzed and found that structural solution to mitigate flood is not the only solution. Based on the analysis some possible mitigation options are put foward.
Keywords Flood Flood Management Danger level Peak floods Deforestation
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 53
End Page 62
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313768
JaLCDOI 10.18926/fest/11500
FullText URL 008_039_052.pdf
Author Kankam-Yeboah Kwabena| Dapaah-Siakwan Stephen| Nishigaki, Makoto| Komatsu, Mitsuru|
Abstract Increasing human population, changing lifestyles and environmental considerations have resulted in increased utilization of groundwater resources worldwide. Thus, in turn, has led to the decline of groundwater levels in some countries and Ghana is no exception to this problem. To augment the availability of groundwater resources for various uses, numerous techniques have been developed in many part of the world, one of which is the construction of underground dams. The successful construction and utilization of underground dams, however, depends very much on the physical and hydrogeological conditions at the dam sites. Ghana is underlain by Precambrian crystalline igneous and metamorphic rocks ; and Paleozoic consolidated sedimentary formations. There are further subdivided and described locally as the Birimian, Dahomeyan, Buem, Togo Series, Tarkwaian, Granites, Voltain, Coastal Block Fault, Coastal Plain and Quaternary Alluvium. The review of these and the pre-requisite conditions necessary for the construction of underground dams indicate that underground dams could be constructed and utilized in some parts of Ghana, especially where the overburden is shallow, in the Dahomeyan granites and in the recent formations consisting of alluvial and coastal sands and gravels. This paper is part of a continuing research programme being carried out by the authors.
Keywords hydrogeology geology underground dam sand-storage dam sub-surface dam water supply
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 39
End Page 52
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313713
JaLCDOI 10.18926/fest/11498
FullText URL 008_027_038.pdf
Author Zou, Dagang| Abe, Hirofumi|
Abstract China has achieved a remarkable economic growth in the past two decades. However, the rapid economic development has led to regional disparities between the advanced coastal regions and the other regions. Regional development planning in China has sought to achieve the redress of regional disparities as well as a high economic growth. This paper aims to examine the role of core cities in the development of Chinese regional economy and their impact on regional differentials. Following a brief review of regional development planning in China, the paper examines the role of core cities on the regional development and the trends in regional disparities using data for seven coastal provinces (Guangdong, Fujian, Zhejiang, Jiangsu, Shandong, Hebei and Liaoning) and three municipalities (Beijing, Tianjin and Shanghai) in the period 1989-1997. It shows that while the coastal regions achieved a high economic growth, the extent of regional disparities and the contributions of core cities to the reduction of economic differentials varied among provinces. The paper concludes by proposing future issues on regional development planning in China.
Keywords regional disparities core cities per capita GDP lavor productivity per capita employment
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 27
End Page 38
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313409
JaLCDOI 10.18926/fest/11497
FullText URL 008_023_026.pdf
Author Watanabe, Masaji| Numaguchi Satoshi|
Abstract The global positioning system (GPS) is utilized for analysis of flows in the water environment. A float equipped with a GPS unit is designed to drift on the surface of the water. Its driving force is the fluid resistance exerted on a pair of rectangular plates. While it travels over the surface, the GPS unit evaluates its position every second, and spatiotemporal data that specify its motion are transmitted to be recorded. Results of experiments conducted to study unsteady flows generated in Kojima Lake are introduced.
Keywords water environment global positioning system
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 23
End Page 26
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313912
JaLCDOI 10.18926/fest/11495
Title Alternative A note on the effect of quadratic term on final pattern in Turing model
FullText URL 008_019_022.pdf
Author Yamauchi, Ken-ichi| Kajiwara, Tsuyoshi|
Abstract The effect of the quadratic term on the final pattern in Turing model is disscussed numerically. Turing models are non linear reaction diffusion equations. Linear analysis for wave length is very useful to find evolving waves. But when a quadratic term appear in the equation, an initial wave can disappears and changes drastically to a spot which is independent of linear analysis.
Keywords Turing instability Reaction Diffusion equation Quadratic term
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 19
End Page 22
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313586
JaLCDOI 10.18926/fest/11492
Title Alternative Development of a statistical survey analysis system using Internet
FullText URL 008_009_017.pdf
Author Fujino, Tomokazu| Tarumi, Tomoyuki|
Abstract We constructed the online analysis system of the Okayama Activity Area Survey in place since 1979. This is one way to solve the problem in case of releasing the result of a statistical survey. In this paper, we treat the detail of the structure of the system.
Keywords microdata statistical disclosure control web based system online database
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 9
End Page 17
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002314053
JaLCDOI 10.18926/fest/11487
FullText URL 008_001_007.pdf
Author Tsunekuni Yasuhiro| Ohga Yukio| Ishikawa, Hirofumi|
Abstract In 1990s, there were rapid increases in the number of HIV epidemics and AIDS cases in Thailand, Southeast Asia. In particular the risk of HIV infection was very high among female prostitutes who played a large part in the transmission of HIV infection. We formulated a mathematical model for the transmission of HIV in prostitutes. We carried out the model simulations to analyze the incipient spread of HIV infection and the effect of AIDS prevention methods in prostitutes. The simulation of our model indicates that even if the effect of AIDS prevention methods such as the recommendation of condom use for commercial sex workers would block the transmission at rate by 70%, the elimination of the HIV epidemic is still beyond attainment.
Keywords AIDS HIV prostitution Thailand transmission model
Publication Title 岡山大学環境理工学部研究報告
Published Date 2003-03
Volume volume8
Issue issue1
Start Page 1
End Page 7
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002314019