Počet záznamů: 1
Comparison of extractable soil carbon and dissolved organic carbon by their molecular characteristics
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SYSNO ASEP 0369017 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Comparison of extractable soil carbon and dissolved organic carbon by their molecular characteristics Tvůrce(i) Šestauberová, Martina (BC-A)
Novák, František (BC-A) RIDZdroj.dok. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis. - : Mendelova univerzita - ISSN 1211-8516
Roč. 59, č. 6 (2011), 337-342Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova DOC ; humic substances ; molecular weight Vědní obor RIV EH - Ekologie - společenstva CEZ AV0Z60660521 - UPB-H, BC-A (2005-2011) Anotace The aim of this study was to compare the molecular characteristics of extractable soil carbon from biotopes of the Rašeliník watershed and dissolved organic carbon (DOC) from Rašeliník creek, by using the 0.1 M pyrophospate, 0.01 M CaCl2 and Britton-Robinson buffer as extraction agents. The molecular weight Mr and weight-average molecular wight Mw determined by the low pressure size exclusion chromatography. Elution curves of all humic substances were characteristic by two peaks with predominant low-molecular fraction. Mr and Mw values of aquatic humic substances were 5.9 and 7.9 kDa, respectively, and proportion of this low-molecular fraction reached 97%. This corresponds to the fact, that the main fraction of HS in surface waters constitute fulvic acids. Using soil extraction in CaCl2 we obtained the fraction of organic carbon similar to the humic substances contain in DOC. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2012
Počet záznamů: 1