A two-year study (2009 ~ 2010) was carried out to investigate the dynamics of different carbon (C) forms, and the role of stream export in the C balance of a 23.4-ha headwater catchment in a tropical seasonal rainforest at Xishuangbanna (XSBN), southwest China. The seasonal volumetric weighted mean (VWM) concentrations of total inorganic C (TIC) and dissolved inorganic C (DIC) were higher, and ...

Understanding the contents and stoichiometry of carbon (C), nitrogen (N), phosphorus (P) is vital to evaluate function processes a forest ecosystem. Overall, 18 sites in Shennongjia Forest from an altitude 800 3000 m were selected collect litterfall, humus, soil (0–20 20–40 cm) samples May, August, December. The spatio-temporal distribution C, N, P their quantified, underlying driving factors a...

Abstract Purpose The aims of the study were to investigate interaction between fractions organic matter and polycyclic aromatic hydrocarbons (PAHs) in bottom sediments use mussels as passive biomonitors consensus-based sediment quality guidelines for ecological risk assessment sediments. Methods Bottom samples taken from 46 points located Ro?nów reservoir (Poland). (SOM) characteristics include...

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...

[1] Surface waters of the Arctic Ocean have the highest concentrations of dissolved organic carbon (DOC) and terrigenous dissolved organic matter (DOM) of all ocean basins. Concentrations of dissolved lignin phenols in polar surface waters are 7-fold to 16-fold higher than those in the Atlantic and Pacific oceans, and stable carbon isotopic compositions of DOM are depleted in C by 1–2% relative...

Bile acids increase the proliferative activity of rat colonic 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 [3H]thymidine (dThd) incor...