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[{"key": "dc.contributor.advisor", "value": "Hiltunen, Minna", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Vehni\u00e4inen, Eeva-Riikka", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Honkaranta, Emilia", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-05-04T05:25:51Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-05-04T05:25:51Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2023", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/86747", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Polysyklisi\u00e4 aromaattisia hiilivetyj\u00e4 (PAH-yhdisteit\u00e4) esiintyy kaikkialla ymp\u00e4rist\u00f6ss\u00e4. Ne syntyv\u00e4t ep\u00e4t\u00e4ydellisen palamisen seurauksena, esimerkiksi vulkaanisessa toiminnassa sek\u00e4 fossiilisten polttoaineiden poltossa. PAH-yhdisteet ovat biokertyvi\u00e4, pysyvi\u00e4 ja eli\u00f6ille haitallisia yhdisteit\u00e4. Er\u00e4s yleisesti esiintyv\u00e4 karsinogeeninen PAH-yhdiste on fluoranteeni. T\u00e4ss\u00e4 tutkimuksessa selvitettiin fluoranteenin (10, 20, 40 ja 80 \u00b5g/l) toksisuutta vesikirpuille eri l\u00e4mp\u00f6tiloissa (18, 20 ja 22 \u00b0C). Lis\u00e4\u00e4ntymiskokeessa seurattiin Daphnia magna-lajin kuolleisuutta, lis\u00e4\u00e4ntymist\u00e4 ja kasvua. Vesikirppujen syd\u00e4mensykett\u00e4 tutkittiin kolmella eri koeasetelmalla videoimalla syd\u00e4nt\u00e4, kun vesikirppu altistettiin fluoranteenille. Tulokset osoittivat, ett\u00e4 fluoranteenialtistus vaikutti haitallisesti Daphnia magna -lajin kasvuun lis\u00e4\u00e4ntymiseen ja syd\u00e4mensykkeeseen. L\u00e4mp\u00f6tilan noustessa poikuekoot kasvoivat, poikastuotanto aloitettiin keskim\u00e4\u00e4rin aiemmin ja \nvesikirppuemot saavuttivat suuremman ruumiinkoon. Suurimmat erot havaittiin yleens\u00e4 18 ja 22 \u00b0C l\u00e4mp\u00f6tilak\u00e4sittelyjen v\u00e4lill\u00e4. Fluoranteenialtistus nosti vesikirppujen syd\u00e4mensykett\u00e4 15 sekunnin altistuksen j\u00e4lkeen, mutta kroonisessa altistuksessa vaikutuksia ei havaittu, mik\u00e4 viestii suojamekanismin k\u00e4ynnistymisest\u00e4 haitta-aineitta vastaan. Vain muutaman asteen l\u00e4mp\u00f6tilaeroilla havaittiin yhdysvaikutuksia fluoranteenialtistuksen kanssa, mik\u00e4 her\u00e4tt\u00e4\u00e4 huolen l\u00e4mpenevien vesiekosysteemien tulevaisuudesta ja lajien sopeutumisesta muuttuviin olosuhteisiin haitta-aineiden my\u00f6t\u00e4vaikutuksessa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants. They are generated in incomplete combustion, e.g., in volcanic activity and the burning of fossil fuels. PAHs are bioaccumulative, persistent and harmful to living organisms. One common, carcinogenic PAH compound is fluoranthene. This study investigated the toxicity of fluoranthene (10, 20, 40 and 80 \u00b5g/L) to water fleas at different temperatures (18, 20 and 22 \u00b0C). The reproduction test monitored the mortality, reproduction, and growth of the Daphnia magna. The heart rate of water fleas was studied with three different experimental setups by videotaping the heart when the water flea was exposed to fluoranthene. The results showed that exposure to fluoranthene had adverse effects on growth, reproduction, and heart rate of Daphnia magna. As the temperature rose, on average the number of offspring increased, clutch production started earlier, and parent animals reached a larger body size. The biggest differences were generally observed between the 18 and 22 \u00b0C temperature treatments. Fluoranthene exposure increased the heart rate of Daphnia after 15 seconds of exposure, but no effects were observed in chronic exposure, which signals the start of the protective mechanism against harmful substances. Only a few degrees of temperature differences were found to have combined effects with fluoranthene exposure, which raises concerns about the future of warming water ecosystems and the adaptation of species to changing conditions with the contribution of harmful substances.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2023-05-04T05:25:51Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-05-04T05:25:51Z (GMT). No. of bitstreams: 0\n Previous issue date: 2023", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "55", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "Clacodera", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "el\u00e4inplankton", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ilmaston l\u00e4mpeneminen", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Fluoranteenin vaikutukset vesikirpun (Daphnia magna) kasvuun, lis\u00e4\u00e4ntymiseen ja syd\u00e4mensykkeeseen eri l\u00e4mp\u00f6tiloissa", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202305042841", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Bio- ja ymp\u00e4rist\u00f6tieteiden laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biological and Environmental Science", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ymp\u00e4rist\u00f6tiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Environmental science", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": null, "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "40151", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "plankton", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ilmastonmuutokset", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "PAH-yhdisteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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