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[{"key": "dc.contributor.advisor", "value": "Taipale, Sami", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Kukkonen, Jussi", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Tiirola, Marja", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Kautonen, Petra", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2020-12-18T11:34:40Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2020-12-18T11:34:40Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2020", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/73347", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Lis\u00e4\u00e4ntynyt mikromuovien runsaus vesist\u00f6iss\u00e4 on yksi suurimmista t\u00e4m\u00e4n hetkisist\u00e4 ymp\u00e4rist\u00f6ongelmista. Muovit ovat kohtalaisen resistenttej\u00e4 hajoamiselle, ja niiden hajoamisen on arvioitu kest\u00e4v\u00e4n sadoista vuosista tuhansiin vuosiin. Todisteita mikrobien kyvyst\u00e4 hajottaa mikromuovia on jo saatu, mutta tarkkaa hajoamisnopeutta luonnonvesiss\u00e4 ei ole m\u00e4\u00e4ritetty. Tutkimukseni tavoitteena oli selvitt\u00e4\u00e4, kuinka nopeasti eri j\u00e4rvityyppien mikrobit hajottavat polyeteenin mikromuovipartikkeleita, ja kuinka monta vuotta kuluisi niiden t\u00e4ydelliseen hajoamiseen boreaalisen vy\u00f6hykkeen j\u00e4rviss\u00e4. Tutkimuksessa k\u00e4ytettiin yhdistespesifist\u00e4 isotooppianalyysi\u00e4 sek\u00e4 kaasukromatografiaa selvitt\u00e4m\u00e4\u00e4n 99 % 13C -leimatun polyeteenin hajoamista humuspitoisessa (H), kirkkaassa (C) ja keinotekoisessa (M) j\u00e4rvivedess\u00e4. Tutkimustulosteni mukaan hajoaminen luonnonvesiss\u00e4 (H, C) kest\u00e4isi 10\u2013144 vuotta, kun hajoaminen ilman mikrobitoimintaa (M) kest\u00e4isi jopa 192\u2013407 vuotta. Polyeteenin hajoaminen ei ollut kuitenkaan merkitsev\u00e4sti nopeampaa humusvesiss\u00e4 (10\u201312 vuotta) kuin kirkkaissa j\u00e4rvivesiss\u00e4 (26\u2013144 vuotta). Tutkimukseni osoitti, ett\u00e4 mineralisaation lis\u00e4ksi mikrobit k\u00e4yttiv\u00e4t polyeteeni\u00e4 uuden biomassan rakentamiseen merkitsev\u00e4sti enemm\u00e4n humusvesiss\u00e4 kuin kirkkaissa j\u00e4rvivesiss\u00e4. Tutkimustulokseni viittaavat, ett\u00e4 polyeteeni\u00e4 hajottavat mikrobit ovat gram-negatiivisia bakteereita, sill\u00e4 n\u00e4iden fosfolipidibiomarkkerit olivat leimaantuneet niin kirkkaassa kuin humusvesiss\u00e4. Tutkimukseni osoittaa, ett\u00e4 polyeteenimikromuovipartikkelit hajoavat luultua nopeammin optimiolosuhteissa, mutta jopa satoja vuosia ilman hajottajamikrobeja.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2020-12-18T11:34:40Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2020-12-18T11:34:40Z (GMT). No. of bitstreams: 0\n Previous issue date: 2020", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "44", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.title", "value": "Polyeteenimikromuovipartikkeleiden hajoaminen boreaalisen vy\u00f6hykkeen j\u00e4rvivedess\u00e4", "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-202012187294", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "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.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": "polyeteeni", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4rvet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mikroroskat", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vesist\u00f6t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "isotoopit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mikrobit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "rasvahapot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "hiili", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "boreaalinen vy\u00f6hyke", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "humus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "limnologia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": 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