result 1288 件
| JaLCDOI | 10.18926/fest/11458 |
|---|---|
| Title Alternative | Numerical Simulation of a Flow Induced by a Pumping-up Facilities in a Lake |
| FullText URL | 009_065_068.pdf |
| Author | Suito, Hiroshi| Nouka, Masakatsu| |
| Abstract | The purpose of this research is solving the flow in a lake which caused by a fan who rotates at the low speed set on the water surface for the purpose of water quality purification of a lake. Although it is shown clearly by various experiments that the water quality in a lake improved by operation of this kind of equipment, the mechanism of the flow was not fully understood. In this research simulation of the flow which was caused by this equipment was carried out numerically, and the aspect of the flow corresponding to various conditions or the form of a lake was investigated. |
| Keywords | Fluid dynamics Numerical simulation |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2004-02-27 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 65 |
| End Page | 68 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313524 |
| JaLCDOI | 10.18926/fest/11457 |
|---|---|
| Title Alternative | Study on Effects of the Density Current Generator by Experiment and Measurement |
| FullText URL | 009_059_064.pdf |
| Author | Watanabe, Masaji| Yamatogi, Toshio| |
| Abstract | The density current generator (Manufacturer: Nakashima Propeller Co., Ltd., Patent owner: Hitachi Metals, Ltd.) is designed to generate vertical circulation over a wide water area harnessing the density current effect. We present some experimental results that we obtained using a float equipped with a GPS unit to study water flows generated by a density current generator unit set in S-Reservoir in Okayama Prefecture. We also present some measured results concerning the water temperature around the unit. We discuss its effects observing the experimental results and the measured results. |
| Keywords | density current stratification water environment |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2004-02-27 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 59 |
| End Page | 64 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313754 |
| JaLCDOI | 10.18926/fest/11456 |
|---|---|
| FullText URL | 009_053_058.pdf |
| Author | Numaguchi Satoshi| Med Mahmoud Ould Med Lemine| Watanabe, Masaji| |
| Abstract | We study a wind-generated current in Kojima Lake. We introduce an experimantal result which was obtained using a float equipped with a GPS unit. We also present a result of numerical study in which a result from finite element analysis of flow is applied to the momentum equation of the float to simulate its motion. |
| Keywords | water environment global positioning system numerical simulation |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2004-02-27 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 53 |
| End Page | 58 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313924 |
| JaLCDOI | 10.18926/fest/11445 |
|---|---|
| Title Alternative | Emulsification Properties of Poly(lactide-block-ethylene glycol-block-lacticide) Block Polymers |
| FullText URL | 011_107_110.pdf |
| Author | Matsumoto, Yasuo| Kitamura, Yoshiro| Yoshizawa, Hidekazu| |
| Abstract | Homo-and copolymers of poly(lactic acid) have gathered much attention because of their biodegradability and biocompatibility. They have numerous applications in the biomedical field due to their potential. In their polymers, we are interested in poly(lactic acid)-poly(ethylene glycol) block polymers. The amphiphilic triblock copolymers, poly(DL-lactic acid)-poly(ethylene glycol)-poly(DL-lactic acid)(PLEL), have known to be surface-active ability. Therefore, we have studied emulsification properties with the polymers. PLEL were prepared by ring-opening copolymerization of DL-lactide and poly(ethylene glycol) catalyzed by stannous 2-ethylhexanoate. We prepared ethyl acetate-water-PLEL emulsion and applied this emulsion to biodegradable polymer scaffolds. PLA scaffolds were prepared by an emulsion freeze-drying method. These scaffolds were made by varying water weight fraction. Their surface pore size became larger with increasing water weight fraction. |
| Keywords | Poly(lactic acid) Poly(ethylene glycol) Biodegradable polymer Tissue Engineering Surfactant |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 107 |
| End Page | 110 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002314040 |
| JaLCDOI | 10.18926/fest/11444 |
|---|---|
| Title Alternative | Synthesis of Novel Temperature-responsive Polymer Gel of Poly(aspartic acid)s |
| FullText URL | 011_103_106.pdf |
| Author | Uehara, Hiroki| Tanimoto, Fumiaki| Kitamura, Yoshiro| Yoshizawa, Hidekazu| |
| Abstract | Recently, thermo-responsive polymer gels have been studied in various research fields such as drug delivery system. One of represetative thermo-responsive polymer gels is poly(N-isopropylacrylamide) gel (PNIPAAm) that has a rapid and reversible volume phase transition. However, PNIPAAm is not biodegradable, resulting in limitation of its use in medical fields. Novel thermo-responsive polymer gel was prepared by closslinking of isopropylamine modified poly(succinimide) (IPA-PSI) (Poly[α,β -(DL-aspartate isopropyl amide)-co-(succinimide)]) with hexamethylenediamine. Because of peptide bonds in backbone, therefore, it is expected to possess biodegradability and biocompatibility. These gels changed their volume in response to change of environment such as temperature, pH and concentration of salt in water. Crosslinkage density and substitution degree of IPA-PSI affected volume phase transition bahavior of the gel. |
| Keywords | Thermo-responsive polymer gel Biodegradable polymer Poly(aspartic acid) Lower Critical Solution Temperature(LCST) Drug delivery system(DDS) |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 103 |
| End Page | 106 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313620 |
| JaLCDOI | 10.18926/fest/11443 |
|---|---|
| FullText URL | 012_083_089.pdf |
| Author | Khan Md. H. R.| Rahman Md. K.| Rouf A. J. M. A.| Sattar G. S.| Akhtar M. S.| Oki, Yoko| Adachi, Tadashi| |
| Abstract | The pH values in the profiles of unburnt (agricultural land) soils were found to increase as a function of soil depth and burning (400 to 1000℃) of the soils increased average pH by 8%. The average sand content of the burnt (soil around brick kilns) soil profiles was increased by 245%, while 39 and 36% decreased the silt and clay contents. Soil organic carbon (Corg) in the unburnt soils (0-20 cm) at different agro-ecological zones in the eastern region of Bangladesh ranged from 0.8 and 1.4%, whereas the content of microbial biomass carbon (Cmic) in the studied unburnt soils ranged between 5 and 7% of the total Corg, suggesting that the microbial biomass releasing considerable amounts of carbon in soil while burning of the soils drastically reduced this contribution to about 1%. The values of soil Cmic in the unburnt soils were approximately 2 to 6 times higher in the topsoils than the subsoils (20-60 cm). Variable rainfall, temperature and soil fertility had an overriding influence, which was reflected by the average minimum (276 μg g(-1)) and maximum (439) amounts of soil Cmic in Moulvibazar and Cox' Bazar sites. The Cmic decreased upon soil burning by 92% of its original average value (346 μg g(-1)) in the soil profile of up to 100 cm. Burning of topsoils strikingly increased the Corg/Cmic ratio by about 6 to 9 times, while reduced the C/N ratio by about 1.5 to 2.5 times. The average loss of Corg, available and total N due to burning of the soils were 66, 72 and 44% (increase over average content of unburnt soil: IOAC), respectively, which suggests that the burning of the soils offset the essential roles of soil microorganisms, reduced soil fertility and soil microbial contribution. |
| Keywords | brick burning C/N ratio microbial biomass carbon soil organic carbon ratio of microbial biomass to organic carbon. |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2007-03-15 |
| Volume | volume12 |
| Issue | issue1 |
| Start Page | 83 |
| End Page | 89 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313396 |
| JaLCDOI | 10.18926/fest/11441 |
|---|---|
| FullText URL | 012_077_081.pdf |
| Author | Khan Md. H. R.| Mohiuddin M.| Rahman M.| Akhtar M. S.| Oki, Yoko| Adachi, Tadashi| |
| Abstract | Studies on the existing non-symbiotic diazotrophic systems still are the most promising for better use of biological nitrogen fixation (BNF) in agriculture. The possibilities for the extension of nitrogen fixation to rice plants still speculative. The prospect of extension of N(2)-fixation to other plants was originally formulated to simulate the possibilities for the biological use of atmospheric nitrogen in order to overcome the ecological and economical problems of nitrogenous fertilizers. In view of this, the present study was conducted for the characterization and identification of N(2)-fixing bacterial strains at the maturity (110 days) stage in rhizosphere of rice (BR 10, Oryza sativa L.) grown in Brahmaputra Alluvium soil of Bangladesh. The soil is characterized as 'Inceptisol' order and 'Aquept' suborder. It was identified as 'Dhamrai series', had 'silt' texture, pH 6.0 and 6.8 C/N ratio. The present results of the microbial tests on the rice rhizosphere soil demonstrated that out of 401 isolates, only 94 were branded as nitrogen fixing organisms per gram of soil, which is about 23.4% of the total isolates. Based on the selection criteria, four individual strains were selected for identification. Biochemical tests were conducted for proper identification. They were identified as Closteridium spp., Klebsiella spp., Bacillus spp. and Azospirllum spp. |
| Keywords | Azospirllum spp. Bacillus spp. BNF Closteridium spp. Diazotrophs Klebsiella spp. Oryza sativa L. |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2007-03-15 |
| Volume | volume12 |
| Issue | issue1 |
| Start Page | 77 |
| End Page | 81 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313950 |
| JaLCDOI | 10.18926/fest/11440 |
|---|---|
| Title Alternative | Measurement of thermal conductivity in the soils of Shirakami Mountains |
| FullText URL | 011_089_092.pdf |
| Author | Hanzawa, Wakako| Moroizumi, Toshitsugu| Sasaki, Choichi| |
| Abstract | Thermal conductivity of soils in Shirakami Mountains that was registered on UNESCO's World Natural Heritage in 1993 were measured using a twin transient-state cylindrical-probe method. The typical results were as follows:(1) Thermal conductivity of the soils in Shirakami Mountains increased according to an increase of soil water content, which was the same tendency as the other soils. (2) The thermal conductivity of the soils was about 0.2～0.3 Wm(-1)K(-1) smaller than volcanic ash soils, and it showed the same tendency as leaf mold. |
| Keywords | Shirakami Mountains Thermal conductivity Twin transient-state cylindrical-probe method Volumetric water content |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 89 |
| End Page | 92 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313628 |
| JaLCDOI | 10.18926/fest/11439 |
|---|---|
| FullText URL | 012_071_076.pdf |
| Author | Chen W.| Yoshida R.| Kawara, Osami| |
| Abstract | The Asahi River Dam reservoir is one of the important fresh water resources in Okayama, Japan, and its eutrophication has been noted since the 1980s. Therefore, aeration has been applied to control the growth of phytoplankton. In this study, we discussed the effect of aeration and water-intake depth on the water quality distribution in the reservoir, based on numerical simulation and observation. The principal conclusions were as follows:(1) The numerical simulation models applied here reproduced observations fairly well. (2) Water intake from the surfacce layer reduced the concentration of chlorophyll a in the surface layers. Water intake from the middle or bottom layer improved the deficit of dissolved oxygen in the bottom layers. (3) Aeration together with water intake from the middle or bottom layer improved the deficit of dissolved oxygen in the bottom layers. |
| Keywords | the Asahi River Dam Reservoir numerical simulation eutrophication water intake depth dissolved oxygen chlorophylla |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2007-03-15 |
| Volume | volume12 |
| Issue | issue1 |
| Start Page | 71 |
| End Page | 76 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002314056 |
| JaLCDOI | 10.18926/fest/11437 |
|---|---|
| FullText URL | 011_075_081.pdf |
| Author | Dincsoy Enver Erdinc| Ichiminami, Fumikazu| |
| Abstract | This study aims to examine the Southeastern Anatolia Project in Turkey, which contains irrigation, energy and drinking water development schemes. The project is the biggest regional development effort ever undertaken by Turkish Government and has influenced the sustainable economic and human development targets. With the completion of each step of the project, it has been expected that there have been many important economic and social changes in Turkish regions, especially the southeast part of Turkey (called as "Southeastern Anatolia Region") and its surrounding areas. The project also interests in both Turkey and its related regions and sustainability is a major issue of concern. Following a brief introduction of the project, the paper examines the type of recent social-economic changes in the region and Turkey in terms of sustainable development components. Under the light of our investigations from different perspectives, it is observed that GAP region with its development project is very far from expectations in the point of sustainability. |
| Keywords | Sustainability Southeastern Anatolia Region GAP Regional Development GDP per capita Turkey |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 75 |
| End Page | 81 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313496 |
| JaLCDOI | 10.18926/fest/11433 |
|---|---|
| Title Alternative | Measuring Method of Water Content for High compacted Bentonite Block by using Frequency Domain Reflectometry |
| FullText URL | 011_057_064.pdf |
| Author | Nishigaki, Makoto| Komatsu, Mitsuru| Chijimatsu, Masakazu| |
| Abstract | In the high-level radioactive waste disposal project, in order to know the infiltration behavior, it have to be examined that the bentonite buffer material is used as a barrier, and the measuring device of moisture with the high accuracy is required. In this study it is discussed the usefulness for Frequency Domain Refrectometry (FDR) method through the measuring dielectric constant and making the calibration curve for the several kinds of bentonite material block (pure and silica sand mixing). |
| Keywords | Measuring syatem Bentonite Volumetric mousture content Frequency domain reflectometry |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 57 |
| End Page | 64 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313913 |
| JaLCDOI | 10.18926/fest/11431 |
|---|---|
| FullText URL | 011_051_055.pdf |
| Author | Nishigaki, Makoto| Komatsu, Mitsuru| Akudago John Apambilla| Shinshi Yoshihide| Kawakami Kenji| Kumamaru Koji| |
| Abstract | A laboratory validation of a proposed new method of determining the in-situ effective porosity of unsaturated soils was carried out on unsaturated river sand. The proposed method consists of boring a small diameter hole into the soil and inserting an Amplitude Domain Reflectometry (ADR) probe at the bottom part of the hole. Water is supplied into the hole till saturation and later de-saturated. The water content with time is determined from the ADR probe voltage potential readings. The effective porosity is determined from the difference between the saturated and de-saturated water contents. However, in the laboratory, the water is supplied through the top and bottom parts of the sample. From the experiments the obtained effective porosity ranged from 0.28 to 0.29 for wetting from the top with an average of 0.287 and 0.29 to 0.30 for wetting from the bottom with an average of 0.293. The determined effective porosity ranged from 71.7-73.3% of the real initial porosity of 0.40 of the river sand. The maximum attained degree of saturation during the experiment was 91%. The results indicated that the method will be suitable and useful in determining the effective porosity of medium grained unsaturated soils. |
| Keywords | Underground dam Effective porosity Storage capacity Freshwater development |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 51 |
| End Page | 55 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313335 |
| Title Alternative | Measurements of Response of Barley and Wheat to Enviromental Factors with an Open System Porometer |
|---|---|
| FullText URL | 005_001_011_021.pdf |
| Author | Maitani, Toshihiko| Kashiwagi, Yoshiaki| |
| Abstract | The rates of photosynthesis and transpiration were measured in barley and wheat under various environmental conditions, with an open system porometer. The rates of photosynthesis and transpiration in the horizontal leaf and vertical leaf had different diurnal variations. The rate of photosynthesis in the vertical leaf was highest in the morning and in the afternoon, while that in the horizontal leaf was highest before noon. The rates of photosynthesis and transpiration and chlorophyll contents were measured for two species(c.v SARI and Akanmugi) of barley grown in submerged soil conditions. At the end of April, chlorophyll contents had decreased and the maintenance respiration acquired in spite of continuous transpiration. The rapid change of photosynthetically active radiation did not affect the rates of photosynthesis or stomatal conductance of SARI grown in submerged soil. The rates of photosynthesis and transpiration and chlorophyll contents were measured for two species(c.v. Hongmangmai and Haruhikari) of wheat grown under different soil water conditions. Chlorophyll content tended to increase in dry soil conditions. Hongmangmai had a higher chlorophyll content than Haruhikari, even at the beginning of May. Hongmangmai had large photosynthetic rate and small transpiration rates under dry soil conditions. These confirm that Hongmangmai has a prominent drought stress tolerance. The open system porometer and the chlorophyll meter may be very useful for comparing physiological characteristics of the plant's response to environmental factors and clarifying differences between plant species. |
| Keywords | Barley Hongmangmai Photosynthesis rate Chlorophyll content Submerged soil Dry soil |
| Publication Title | 岡山大学資源生物科学研究所報告 |
| Published Date | 1997 |
| Volume | volume5 |
| Issue | issue1 |
| Start Page | 11 |
| End Page | 21 |
| ISSN | 0916-930X |
| language | Japanese |
| File Version | publisher |
| Title Alternative | QTL Mapping for Water Sensitivity in Barley Seeds |
|---|---|
| FullText URL | 006_001_021_028.pdf |
| Author | Iwasa, Tomohiko| Takahashi, Hidekazu| Takeda, Kazuyoshi| |
| Abstract | Sensitivity to water condition during germination is an important character in malting barley because it affects malt poduction. Water sensitivity in malting barley is defined as the defference in germination percentage between the seeds in standard and excess-water conditions. Usually standard and excess-water condition means 4 and 8 ml water in a 90 mm perti dish, respectively. Takeda and Fukuyama (1983) examined more than 4,000 barley accessions and found 0～100% water sensitivity. This means complete to no suppression of germination by an excess-water condition. In this study, quantiative trait loci (QTL) analysis was applied to analize the inheritance of water sensitivity. Two sets of doubled haploid (DH) populations derived from Steptoe×Morex (S/M) and Harrington×TR306 (H/T) crosses,were grown in the experiment field of the Research Institute for Bioresources, Okayama University. Bulbosum method was adapted to develop DH lines (Chen and Hayes 1989). Water sensitivities of 150 (S/M) and (H/T) lines and their parents were evaluated using 50 seeds each and the germination test (25℃, 4 days) was repeated four times. Water sensitivity showed a large variation (Fig.1) and the heritability of the trait was 0.78 and 0.72 in S/M and H/T, respectively, indicating that about three-quarters of the phenotypic variance was genetic in origin. Three (S/M) and one (H/T) significant QTL were detected and 23% (S/M) and 25% (H/T) of the phenotypic variance was explained by the QTL. These QTL were located on chromosomes 2H,3H,6H and 7H (Table 1, Fig. 2). QTL relating to germination traits were lacated near the QTL controlling water sensitivity (Fig. 3). Interaction among the QTL was small (Table 2). Marker-assisted selection was effective (Table 3). |
| Keywords | barley water sensitivity QTL analysis |
| Publication Title | 岡山大学資源生物科学研究所報告 |
| Published Date | 1999 |
| Volume | volume6 |
| Issue | issue1 |
| Start Page | 21 |
| End Page | 28 |
| ISSN | 0916-930X |
| language | Japanese |
| File Version | publisher |
| Title Alternative | Estimation of Turbulent Fluxes by Gradient Method with Surface Temperatures of Rice Plant Canopy |
|---|---|
| FullText URL | 006_001_001_011.pdf |
| Author | Miyashita, Koichi| Maitani, Toshihiko| |
| Abstract | Micrometeorological observations including turbulent fluxes and canopy surface temperatures were made in paddy in the summer of 1997. The sensible and latent heat fluxes were estimated by the gradient method under the assumption of similarity between the turbulent exchange coefficient for momentum and that for heat and water vapor. The surface temperatures measured by a thermal imager and water vapor pressures estimated from surface temperatures and relative humidity were used for temperature and water vapor at the height(d+z0) of U=0, where d is the displacement height, z0 the roughness length and U the mean wind velocity. The sensible and latent heat fluxes estimated by the gradient method depicted typical diurnal varietions. The turbulent fluxes by the present method and eddy correlation method showed fairly good agreement, especially for latent heat fluxes. These results confirmed that this method is a promising one. |
| Keywords | Surface temperature Rice plant canopy Thermal imager Turbulent fluxes |
| Publication Title | 岡山大学資源生物科学研究所報告 |
| Published Date | 1999 |
| Volume | volume6 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 11 |
| ISSN | 0916-930X |
| language | Japanese |
| File Version | publisher |
| Title Alternative | Vertical Structure of Temperatures of Tree's Leaves and Gate Wall at Rashomon Doline |
|---|---|
| FullText URL | 005_002_169_181.pdf |
| Author | Miyashita, Koichi| Maitani, Toshihiko| |
| Abstract | Temperatures of tree's leaves and gate wall were measured in the summer of 1996 at doline. Diurnal fluctuations of leaf temperatures were greater, the higher the position of leaf in the doline, and they showed maximum temperatures later, the deeper the leaf position. The leaf temperature of trees growing in the first collapse doline was uniform in the horizontal direction and had a stable thermal layer. The difference between leaf temperatures at a depth of 20 m and 11 m was about 12℃ around noon. The leaf temperature was always higher at the upper part than at the lower part of the doline throughout the day. Daily fluctuation of wall temperature was small,compared with that of leaf temperature. The vertical profile of wall temperature was similar to that of leaf temperature. The warm water flowing down from the upper part of the doline influenced the soil temperature in the lower part of the doline. The thermal imagery elucidated the peculiar vertical structure of leaf and wall temperature formed in the summer at Rashomon doline. |
| Keywords | Rashomon Doline Leaf temperature Wall temperature Thermal image |
| Publication Title | 岡山大学資源生物科学研究所報告 |
| Published Date | 1998 |
| Volume | volume5 |
| Issue | issue2 |
| Start Page | 169 |
| End Page | 181 |
| ISSN | 0916-930X |
| language | Japanese |
| File Version | publisher |
| Title Alternative | メダカハネカクシの尾部分分泌物 |
|---|---|
| FullText URL | 004_001_025_031.pdf |
| Author | Kanehisa, Katsuo| Tsumuki, Hisaaki| |
| Abstract | Rove beetles have a pair of pygidial excretory organs, each group secretes characteristic substances in a peculiar manner. The genus Stenus has a pair of pygidial organs, eversible by immersion in diethyl-ether at both sides of the anus. S. anthoracinus, S. melanarius vercecundus and S. rufescens were collected at ponds and river shores, and S. alienus was collected at tobacco and vegetable fields. Excretory substances were secreted in the diethylether, and identified by gas chromatography and mass spectrometry. Stenusin [N-Ethyl-3-(2-methylbutyl) piperidine], 1,8-cineole, isopiperitenol and 6-Me-5-hepten-2-one were identified. These may probably act as defensive substances against small attacking animals and microorganisms, and act as water suface moving active agents. |
| Keywords | Rove beetles Stenus Excretory secretion Pygidial organ Defensive secretion |
| Publication Title | 岡山大学資源生物科学研究所報告 |
| Published Date | 1996 |
| Volume | volume4 |
| Issue | issue1 |
| Start Page | 25 |
| End Page | 31 |
| ISSN | 0916-930X |
| language | English |
| File Version | publisher |
| Title Alternative | Promotion of Drying of Leaves Detached from Plants after Rainfall Exposure |
|---|---|
| FullText URL | 002_002_191_200.pdf |
| Author | Kimura, Kazuyoshi| |
| Abstract | The drying of leaves detached from 16 plants (mainly, vegetalbles) after artificial rainfall (mist)treatment was examined in a growth chamber(20℃,8 klux). Leaves detached from misted plants had a higher drying rate than those detached from non-misted plants. The promoting effect of mist on the dryint rate was increased with the increase in the duration of mist exposure. The degree of drying after mist exposure for 3 days or more was increased markedly. In almost all the plants,the weight of the leaves detached from the plants decreased to 10-20% of the initial weight 24 hours after a 5-day mist treatment, but 40-50% in cabbadge, chinese leek and welsh onion. In general, the degree of drying was greater in the young developing leaves or older leaves than in active young leaves. These findings suggested that the surface wax and cuticular of the leaf is injured by rainfall wetting, and that water discharge(transpitation) in the leaf is increased greatly. |
| Keywords | Rainfall Leaf Drying Vegetables |
| Publication Title | 岡山大学資源生物科学研究所報告 |
| Published Date | 1994 |
| Volume | volume2 |
| Issue | issue2 |
| Start Page | 191 |
| End Page | 200 |
| ISSN | 0916-930X |
| language | Japanese |
| File Version | publisher |
| Title Alternative | Absorption of Iron by MuSty-Odor Producing Cyanobacteria (Anabaena macrospora, Phormidium tenue, Oscillatoria tenuis and Oscillatoria brevis) |
|---|---|
| FullText URL | 001_001_035_050.pdf |
| Author | Nakashima, Susumu| Aoyama, Isao| Yagi, Masakazu| |
| Abstract | 近年、琵琶湖の南湖をはじめ、霞々浦や相模湖など多くの湖沼や水道水源地において、人間活動に付随すると富栄養化問題となり、ラン藻類、特にかび臭物質を産生するラン藻の発生が憂慮されている。琵琶湖を水源とする大津、京都、大阪、神戸など関西の各都市の水道では、同湖で毎年発生するラン藻、すなわちAnabaena macrospora｛ジオスミン（geosmin）を産生｝やPhormidium tenue, Oscillatoria tenuis｛2-メチルイソボルネオール（2-methylisoborneol, MIB）を産生｝などが作り出すこれらのかび臭物質（ジオスミンまたはMIB）による水道水の異臭味が大きな問題となっている。こうした水圏環境における異臭味は世界各地でも問題となり、近年この問題に関する国際シンポジウム（International Symposium on Off-Flavors in the Aquatic Environment）が開かれるようになり、1982年6月には第1回（ヘルシンキ）、1987年10月には第2回（鹿児島）、そして1991年3月には第3回（ロサンゼルス）のシンポジウムがそれぞれ開催された。しかしこうしたラン藻が異常増殖する要因はまだ明らかではない。そのためかび臭物質を産生するラン藻類の発生を予測あるいは抑制する情報に関する研究は強い要請があるにもかかわらずあまり進展をみていない。 |
| Publication Title | Bulletin of the Research Institute For Bioresources, Okayama University |
| Published Date | 1992 |
| Volume | volume1 |
| Issue | issue1 |
| Start Page | 35 |
| End Page | 50 |
| ISSN | 0916-930X |
| language | Japanese |
| File Version | publisher |
| Author | Inaba, Hideo| Takeya, Kengo| |
|---|---|
| Published Date | 1994-10-25 |
| Publication Title | 日本機械学會論文集 B編 |
| Volume | volume60 |
| Issue | issue578 |
| Content Type | Journal Article |
