Water contamination is a main inducement of human diseases. It is an important step to monitor the water quality in the water distribution system. Due to the features of large size, high cost, and complicated structure of traditional water determination sensors and devices, it is difficult to realize real-time water monitoring on a large scale. In this paper, we present a multi-parameter sensor...

We describe here a method using HPLC for the simultaneous determination of albiflorin, paeoniflorin, glycyrrhizin and six flavanone glycosides (liquiritin, liquiritin apioside, naringin, neohesperidin, hesperidin and narirutin) in the Kampo medicines, Shigyaku-san and Haino-san. All nine components were separated in less than 40 min by linear gradient elution using a mobile phase containing aqu...

until later determination was added. The perfusate was stored at -20 “C and TxB by radioimmunoassay. Perfusion pressure was kept at 7 mm Hg and the A&n vessel segments from each animal were divi B ulsatile%nean flow at 90 ml/mm. The four ed into four groups with pH at either 6.0, 7.0, 7.4 or 7.8. The HBSS stock solution with a pH of 6.3 was titrated with NaOH or HCl to reach the desired pH. The...

For determination of the activity of this enzyme (EC 4.2.1.24) in blood, pH dependency was evaluated by using whole blood and washed erythrocytes. The effects of assay methods, original and final pH, and use of sodium or potassium phosphate buffer were examined. The pattern of pH dependency differed for whole blood and washed erythrocytes, whether blood from normal or lead-exposed subjects was ...

A new and simple analytical method is described for the determination of the IC50 values of the inhibitors of the hydrolysis of acetylcholine (ACh) or acetylthiocholine (ATCh) by cholinesterases. The method is based on monitoring the time course of the pH value during the uninhibited and inhibited reaction. It requires only a pH meter with a suitable pH measuring cell and a small thermostated s...

A glassy carbon electrode was modified with graphene oxide nanosheets and a hybrid of copper-cobalt hexacyanoferrate. The nanocomposite was characterized by cyclic voltammetry, FT-IR and scanning electron microscopy. Cyclic voltammetry showed a stable and reversible redox pair with surface confined characteristics in phosphate buffer solution (0.1 M, pH 3). Hydrodynamic amperometry was used for...

IDEALLY, THE EVALUATION of acid-base balance should be made from the determination of 002 content and pH on arterial plasma. Obtaining arterial blood is not, however, a routine clinical procedure. Hence, next in order of preference is the performance of these two determinations on plasma of arterialized blood which may be easily obtained by soaking the arm of the subject in a water bath at 40#{...