{"title":"“Shi-Kan” on Ecotoxicology","authors":"I. Aoyama","doi":"10.11403/JSET.10.11","DOIUrl":"https://doi.org/10.11403/JSET.10.11","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83406806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessment of overall herbicide effects on river ecosystems through periphyton and aquatic plants","authors":"S. Hatakeyama","doi":"10.11403/JSET.9.51","DOIUrl":"https://doi.org/10.11403/JSET.9.51","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72625563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Koyama, Shoko Imai, K. Fujii, S. Kawai, C. Yap, A. Ismail
Estrogens (17 B-estradiol and estrone) concentrations in river and estuarine waters around Kuala Lumpur, Malaysia were determined by enzyme-linked immunosorbent assay while estrogenic potential of the waters were ascertained by three in vitro bioassays, namely E-screen, Ishikawa cell-alkaline phosphatase and yeast estrogen screen. Moreover, hepatic vitellogenin, a precursor of yolk protein that is specific to females, were examined in male and female Java-medaka collected in the same area. 17B-estradiol and estrone concentrations were less than 6.1 ng/L and 127 ng/L, respectively. The highest 17B-estradiol equivalent activity, 284 ng/L, was detected by in vitro assay in Sungai Kuyoh, which was adjacent to a sewage plant. 17B-estradiol and estrone concentrations were not equal to their estrogenic potentials determined by in vitro assay implying the presence of other estrogenic chemicals in these waters. Hepatic vitellogenin concentrations of both male and female java-medaka were the same to laboratory-cultured individuals. Although relatively high estrogen concentrations were detected in some waters of Malaysia, these were not high enough to induce hepatic vitellogenin in male fishes. Further research, however, is necessary to cover more number of sampling sites.
采用酶联免疫吸附法测定了马来西亚吉隆坡附近河流和河口水域的雌激素(17 b -雌二醇和雌酮)浓度，并采用E-screen、Ishikawa细胞碱性磷酸酶和酵母雌激素筛查三种体外生物测定法确定了该水域的雌激素潜能。此外，在同一地区收集的雄性和雌性爪哇鱼中检测了雌性特有的卵黄蛋白前体肝卵黄原蛋白。17b -雌二醇和雌酮浓度分别小于6.1 ng/L和127 ng/L。通过体外实验检测到Sungai Kuyoh的17b -雌二醇当量活性最高，为284 ng/L，邻近污水厂。b -雌二醇和雌酮的浓度不等于体外测定的雌激素潜力，这意味着这些水中存在其他雌激素化学物质。雄性和雌性水爪哇鱼的肝脏卵黄蛋白原浓度与实验室培养的个体相同。虽然在马来西亚的一些水域检测到相对较高的雌激素浓度，但这些浓度不足以诱导雄性鱼的肝卵黄蛋白原。然而，需要进一步的研究以覆盖更多的取样地点。
{"title":"Pollution by estrogens in river and estuarine waters around Kuala Lumpur, Malaysia, and their effects on the estuarine Java-medaka, Oryzias javanicus","authors":"J. Koyama, Shoko Imai, K. Fujii, S. Kawai, C. Yap, A. Ismail","doi":"10.11403/JSET.9.141","DOIUrl":"https://doi.org/10.11403/JSET.9.141","url":null,"abstract":"Estrogens (17 B-estradiol and estrone) concentrations in river and estuarine waters around Kuala Lumpur, Malaysia were determined by enzyme-linked immunosorbent assay while estrogenic potential of the waters were ascertained by three in vitro bioassays, namely E-screen, Ishikawa cell-alkaline phosphatase and yeast estrogen screen. Moreover, hepatic vitellogenin, a precursor of yolk protein that is specific to females, were examined in male and female Java-medaka collected in the same area. 17B-estradiol and estrone concentrations were less than 6.1 ng/L and 127 ng/L, respectively. The highest 17B-estradiol equivalent activity, 284 ng/L, was detected by in vitro assay in Sungai Kuyoh, which was adjacent to a sewage plant. 17B-estradiol and estrone concentrations were not equal to their estrogenic potentials determined by in vitro assay implying the presence of other estrogenic chemicals in these waters. Hepatic vitellogenin concentrations of both male and female java-medaka were the same to laboratory-cultured individuals. Although relatively high estrogen concentrations were detected in some waters of Malaysia, these were not high enough to induce hepatic vitellogenin in male fishes. Further research, however, is necessary to cover more number of sampling sites.","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85081086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hirokazu Takahashi, Kwang‐Hyeon Chang, T. Hanazato
{"title":"Acute Toxicity of the Insecticide Diazinon and Carbaryl to Calanoid and Cyclopoid Copepoda (Eodiaptomus, Mesocyclops and Thermocyclops) in Different Life Stages","authors":"Hirokazu Takahashi, Kwang‐Hyeon Chang, T. Hanazato","doi":"10.11403/JSET.9.133","DOIUrl":"https://doi.org/10.11403/JSET.9.133","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77101231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lei Lei, M. Piao, H. Nishizaki, Hirofumi Nakamura, I. Aoyama
{"title":"Toxicity identification evaluation on industrial and municipal solid waste landfill leachates","authors":"Lei Lei, M. Piao, H. Nishizaki, Hirofumi Nakamura, I. Aoyama","doi":"10.11403/JSET.9.11","DOIUrl":"https://doi.org/10.11403/JSET.9.11","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81483524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tomoyasu Hirano, R. Masho, Daisuke Koizumi, S. Tabata, Kentaro Suzuki, Mai Sakabe, Y. Nakano, Nobuyuki Sato, R. Sudo
We present the results of a test run done for protocols drafted to evaluate the toxicity of different bioremediation agents against spilled-oil using marine organisms and crude oil. The aim of the study was to evaluate experimentally the change in toxicity of oil when mixed with bioremediation agents and fertilizers used on oiled shores to enhance oil biodegradation under actual environmental conditions prevailing at the oiled site before considering any large-scale application. The protocols were designed to use three marine species at different trophic levels, i.e. diatoms Skeletonema costatum, rotifers Brachionus plicatilis, and red sea bream Pagrus major, and to carry out algal growth inhibition, zooplankton acute immobilization, and fish acute toxicity tests. The agents tested are: Inipol EAP22, oleophilic fertilizer; Terrazyme, bioaugmentation agent; and Super IB/Linstar, slow-release fertilizer. While Super IB/Linstar did not enhance the toxicity of oil, clear suppression of diatom cell growth was observed when 100 ppm of Inipol EAP22 was added to oil. The concen-
{"title":"Ecotoxicity testing of bioremediation agents for shoreline oil-spill clean up","authors":"Tomoyasu Hirano, R. Masho, Daisuke Koizumi, S. Tabata, Kentaro Suzuki, Mai Sakabe, Y. Nakano, Nobuyuki Sato, R. Sudo","doi":"10.11403/JSET.9.115","DOIUrl":"https://doi.org/10.11403/JSET.9.115","url":null,"abstract":"We present the results of a test run done for protocols drafted to evaluate the toxicity of different bioremediation agents against spilled-oil using marine organisms and crude oil. The aim of the study was to evaluate experimentally the change in toxicity of oil when mixed with bioremediation agents and fertilizers used on oiled shores to enhance oil biodegradation under actual environmental conditions prevailing at the oiled site before considering any large-scale application. The protocols were designed to use three marine species at different trophic levels, i.e. diatoms Skeletonema costatum, rotifers Brachionus plicatilis, and red sea bream Pagrus major, and to carry out algal growth inhibition, zooplankton acute immobilization, and fish acute toxicity tests. The agents tested are: Inipol EAP22, oleophilic fertilizer; Terrazyme, bioaugmentation agent; and Super IB/Linstar, slow-release fertilizer. While Super IB/Linstar did not enhance the toxicity of oil, clear suppression of diatom cell growth was observed when 100 ppm of Inipol EAP22 was added to oil. The concen-","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78654916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study of Indoor Air Pollution by Permethrin: Determination of Permethrin in Indoor Air and 3-phenoxybenzoic acid in Residents' Urine as an Exposure Index","authors":"H. Dai, F. Asakawa, F. Jitsunari","doi":"10.11403/JSET.9.31","DOIUrl":"https://doi.org/10.11403/JSET.9.31","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78946607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thorium(Th),an actinoide element, is among the most common naturally-occurring radioactive materials found in the environment. Thorium was used as a radiographic contrast agent(thorotrast)from 1930 to 1955, and many studies on its effects on the human body have been reported. Once thorium is absorbed, the risk of cancer increases due to direct bombardment from alpha-particles with high linear energy transfer during thorium decay. Most of these reports focused on irradiation damage caused by long-term thorium exposure. In contrast, acute thorium toxicity derives more from thorium’s chemical reactivity than its radioactive decay. Here, we report the chemical toxicity of thorium using yeast DNA microarray analysis. Thorium treatment of yeast was found to induce 136 genes. Genes involved in“C-compound and carbohydrate metabolism”,“energy”,“cell rescue, defense and virulence”and“biogenesis of cellular component”were induced significantly by thorium treatment. These genes were further classified into the following processes: oxidative stress(7 genes),glycogen and trehalose metabolism(6 genes),and cell wall damage(10 genes).However, only one gene related to DNA damage was induced. These results indicate that thorium causes cell wall damage and induces oxidative stress, and suggest that in order to overcome oxidative stress, cells promote metabolism of energy reserves in the form of glycogen and trehalose.
{"title":"Chemical toxicity of thorium in Saccharomyces cerevisiae","authors":"Satomi Mizukami-Murata, Y. Murata, H. Iwahashi","doi":"10.11403/JSET.9.87","DOIUrl":"https://doi.org/10.11403/JSET.9.87","url":null,"abstract":"Thorium(Th),an actinoide element, is among the most common naturally-occurring radioactive materials found in the environment. Thorium was used as a radiographic contrast agent(thorotrast)from 1930 to 1955, and many studies on its effects on the human body have been reported. Once thorium is absorbed, the risk of cancer increases due to direct bombardment from alpha-particles with high linear energy transfer during thorium decay. Most of these reports focused on irradiation damage caused by long-term thorium exposure. In contrast, acute thorium toxicity derives more from thorium’s chemical reactivity than its radioactive decay. Here, we report the chemical toxicity of thorium using yeast DNA microarray analysis. Thorium treatment of yeast was found to induce 136 genes. Genes involved in“C-compound and carbohydrate metabolism”,“energy”,“cell rescue, defense and virulence”and“biogenesis of cellular component”were induced significantly by thorium treatment. These genes were further classified into the following processes: oxidative stress(7 genes),glycogen and trehalose metabolism(6 genes),and cell wall damage(10 genes).However, only one gene related to DNA damage was induced. These results indicate that thorium causes cell wall damage and induces oxidative stress, and suggest that in order to overcome oxidative stress, cells promote metabolism of energy reserves in the form of glycogen and trehalose.","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87369875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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