The oxygen isotopic composition of phosphate (?18OP) in soils and surface water bodies has been used to trace terrestrial P inputs into aquatic ecosystems. However, enhanced biological activity vegetated riparian buffer strips (VBSs) may lead an alteration ?18OP values. objective this study was assess whether cycling VBS can be identified using For purpose, we sampled temperate grassland at var...

A simplified manual and automated method is described for measuring serum cholinesterase activity and identifying the homozygous “usual,” heterozygous, and homozygous “atypical” forms of the enzyme. With butyrylthiocholine as substrate at pH 7.4, the activity is determined in two 0.05 mol/liter buffer systems, Tris and phosphate. The “usual” enzyme has the same activity in both buffer systems. ...

We found that deoxy Hb A aggregated or formed gels with a clear exhibition of a delay time when a solution of deoxy Hb A with a concentration of 120% of its solubility was incubated at 30°C. Since the solubility of deoxy Hb A is much higher than that of deoxy Hb S, this condition was created by increasing the phosphate concentration. The length of the delay and aggregation times and the amounts...

A novel column made through the condensation reaction of TiO2 nanoparticles (TiO2 NPs) with silanol groups of the fused-silica capillary is described. EOF measurements under various buffer constitutions were used to monitor the completion of reactions. The results indicated that the EOF was dependent on the interactions between buffers and the bonded TiO2 NPs. With formate/Tris buffer, EOF reve...