The role of sediment-bound organic phosphorus (Po) on lake eutrophication was studied using sequential extraction and enzymatic hydrolysis by collecting sediments from Dianchi Lake, China. Bioavailable Po species including labile monoester P, diester P, and phytate-like P were identified in the sequential extractions by H2O, NaHCO3, and NaOH. For the H2O-Po, 36.7% (average) was labile monoester...

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The specific inhibitory effect of colchicine upon protein secretion by lacrimal glands could be related to the formation of a complex between colchicine and tubulin from the soluble fraction of the gland. By gel electrophoresis under nondissociating conditions, it is shown that this complex is similar to the colchicine . tubulin complex from brain. The complex isolated from lacrimal glands is h...

The increased land-use change (LUC) from native lands to other land use at the Conoor region of western ghats in Tamil Nadu has severely declined soil carbon concentration. Therefore quantify this decline, Carbon Management Index (CMI) was worked out under major uses {(Forest (FOR), cropland (CRP), tea plantation (TEA)} using total organic (TOC) and pools varying degrees lability {a) NLC (non-l...

Eukaryotic DNA is packaged into chromatin, folded and compacted. The building blocks of mammalian chromatin are nucleosomes, which consist of octomers of histone proteins that can be post-translationally modified (PTM). Protein phosphorylation is one of the most abundant PTMs. Histones are phosphorylated mainly on serine, threonine, tyrosine as well as other sites such as arginine, histidine an...

1. We estimated uptake of stream water dissolved organic carbon (DOC) through a wholestream addition of a C-DOC tracer coupled with laboratory measurements of bioavailability of the tracer and stream water DOC. 2. The tracer, a leachate of C-labelled tree tissues, was added to the head waters of White Clay Creek, Pennsylvania, U.S.A., over a 2-h period and followed 1.27 km downstream to generat...

The complexation of Cd2+ by diallyl disulfide (DADS) and diallyl sulfide (DAS) has been studied by differential pulse voltammetry. Stability constants, (log β), of the 1:1 (PbL) and 1:2 (PbL2) complexes, where L = ligand, were found to be in the range of ca. 5.8 - 6.2 and 9.6 -10.6, respectively. Complex formation is accompanied with a significant decrease in the peak current and the shift of t...