[1] Flow-weighted dissolved organic carbon (DOC) concentrations and dO values were determined from major arctic rivers, specifically the Ob, Yenisey, Lena, Kolyma, Mackenzie, and Yukon during 2003–2004. These data were considered in conjunction with marine data for DOC, dO values, nutrients, salinity, and fluorometric indicators of DOC obtained during sampling at the shelf-basin boundary of the...

The production rates of DOC and POC by phytoplankton during the FRUELA 95 cruise were estimated by means of time-course experiments of C-bicarbonate incorporation. A three-compartment carbon exchange model was used to avoid the artifacts that may appear in end-point experiments due to heterotrophic removal of recently released DOC. The study area was classified into three regions with different...

The presence of natural organic matter (NOM) strongly impacts drinking water treatment, water quality, and water behavior during distribution. Dissolved organic carbon (DOC) concentrations were determined daily over a 22 month period in river water before and after conventional drinking water treatment using an on-line total organic carbon (TOC) analyzer. Quantitative and qualitative variations...

Photochemically-released dissolved organic matter (PR-DOM) from resuspended sediments is an understudied flux of carbon (DOC) and nutrients with the potential to influence estuarine microbial food webs. There currently limited knowledge on composition, lability biological alterations this material once released into water column. This study addresses composition fate PR-DOM Cape Fear River Estu...

Introduction. Azithromycin is among the broad-spectrum antibiotics that is widely available in various environmental systems and could have destructive effects on the ecosystem and human health due to its bacterial resistance. In this study, removal of azithromycin from wastewater using an advanced oxidation process of ultraviolet light with and without persulfate was investigated and effective...

Drainage following conversion of peatlands to oil palm plantations is always associated with carbon (C) loss, one which dissolved organic (DOC). Analytical procedure commonly used determine DOC the high-temperature combustion (HTC) method, requires an expensive instrument. An alternative low-cost method has been developed. The objectives this research were and validate most suitable UV-Vis spec...

Simultaneous removal of nitrate ([Formula: see text]) and natural organic matter (NOM) from drinking water using a hybrid heterotrophic/autotrophic/BAC bioreactor (HHABB) was studied in continuous mode. The HHABB consisted of three compartments: ethanol heterotrophic part, sulfur autotrophic part, and biological activated carbon (BAC)-part (including anoxic and aerobic sections). Experiments we...

Bile acids increase the proliferative activity of rat colonie epithelium. However, the mechanisms responsible are unknown. The present study examined the relationships between deoxycholate (DOC) induced surface cell sloughing, as measured by loss of DNA into the lumen and by light microscopy, and the subsequent increases in mucosal ornithine decarboxylase activity and | 'I l|tli> mulino (dl lid...