(UL)
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Sestava koloidne organske snovi in njena kompleksacija s kovinami v obalnem morju (Tržaški zaliv) : doktorska disertacija = Composition and complexation of colloidal organic matter in coastal sea (Gulf of Trieste) : doctoral dissertationKlun, Katja, 1988-V Tržaškem zalivu so se v preteklosti pozno spomladi/na začeteku poletja periodično pojavljali sluzasti makroagregati, ki so bili na zadnje opaženi leta 2004. Prekurzor za nastanek tovrstnih ... agregatov je koloidna organska snov (COM), zato smo se osredotočili na študij sezonskih sprememb vsebnosti, sestave in izvora COM. Uporabili smo spektroskopijo 1H NMR in FTIR ter kromatografijo HPSEC za opazovanje sprememb v sestavi in velikosti COM. Rezultati so pokazali, da se predvsem vsebnost lipidov v COM do poletja zviša, kar lahko dodatno vpliva na nastanek mikro- in makrogelov. HPSEC nam je potrdil, da proti poletju prihaja do agregacije COM, saj VM COM predstavlja večino COM (95 %), medtem ko se NM COM od zime do poletja bistveno zniža (iz 45 % na 5 %). Avgusta se njuni razmerji skoraj izenačita, kar nakazuje tvorbo mikro- in makrogelov ali pa povišano mikrobno razgradnjo. Karakterizacija COM izolirane iz fitoplantkonskih kultur iz Tržaškega zaliva je pokazala, da fitoplankton k sestavi in strukturi COM prispeva predvsem z vsebnostjo polisaharidov. Z ICP-MS in CVAAS smo spremljali sezonske spremembe vsebnosti kovin v koloidni frakciji. Hg in Cu imata največjo afiniteto do COM, kar se je pokazalo v pozitivni korelaciji s COM. Tako kot COM se tudi Hg in Cu akumulirata do julija, v avgustu pa njuna vsebnost hitro pade, kar je lahko posledica agregacije ali mikrobne razgradnje COM. Podatki vsebnosti kovin preko slanostnega transekta reke Soče kažejo, da se nekatere kovine pojavijo v vodnem stolpcu kot posledica desorpcije delcev, ki so jih nanesle reke. Druge kovine in tudi COM se ob višanju ionske moči agregirajo in potonejo, kar se pokaže v nižji vsebnosti kovin in COM na izlivu reke Soče.Type of material - dissertation ; adult, seriousPublication and manufacture - Ljubljana : [K. Klun], 2016Language - slovenianCOBISS.SI-ID - 3784015
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Repository of the University of Ljubljana – RUL
Digitalna knjižnica Slovenije - dLib.siDostop z namenskih računalnikov v prostorih NUK
Author
Klun, Katja, 1988-
Other authors
Faganeli, Jadran |
Falnoga, Ingrid |
Šket, Boris, 1947-
Topics
koloidi |
Disertacije |
morje |
koloidi |
kompleksacija
Library | Call number – location, accession no. ... | Copy status |
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National and University Library, Ljubljana | GS II 725418 glavno skladišče | available - reading room |
BF, Central Biotechnical Library, Lj. | Skladišče DJH DR II 9874 IN: 02016057747 |
available - outside loan, loan period: 30 days |
BF, Forestry Library, Ljubljana | BFGO Knjižnica DD 139 IN: 12016000046 |
available - outside loan, loan period: 1 days |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Klun, Katja, 1988- | 34499 |
Faganeli, Jadran | 05249 |
Falnoga, Ingrid | 10582 |
Šket, Boris, 1947- | 06061 |
Source: Personal bibliographies
and: SICRIS
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