The overall internal pH of the acid-tolerant green alga, Chlorella saccharophila, was determined in the light and in the dark by the distribution of 5,5-dimethyl-2-[(14)C]oxazolidine-2,4-dione ([(14)C]DMO) or [(14)C]benzoic acid ([(14)C]BA) between the cells and the surrounding medium. [(14)C]DMO was used at external pH of 5.0 to 7.5 while [(14)C]BA was used in the range pH 3.0 to pH 5.5. Neith...

The feasibility of natural apatite for adsorptive removal of Fe from aqueous solution was investigated. Batch experiments were performed as function of process parameters such as contact time, initial concentration of Fe, temperature, apatite dosage and pH. The natural apatite exhibited a high performance for the removal of Fe from aqueous solution. The pH value clearly affects the removal mech...

In vivo experiments were carried out to determine the effect of forced activity on circulating catecholamine levels, haematocrit, and the pH and water content of erythrocytes in the toad, Bufo marinus. In addition, the effect of the beta-adrenergic agonist isoproterenol on erythrocyte pH and water content was examined in vitro. Forced activity caused a significant decrease in both whole blood a...

L-Pyroglutamate (PGA) is naturally occurring from L-glutamate solution with accelerated formation rate under high temperature and low pH. Even though PGA has been identified as a neurotoxic agent on brain cells, the effect of PGA on the growth of microorganisms is rarely known. Here various kinds of microorganisms differing in their optimal growth temperature, pH, phylogeny, and isolated biotop...

Temperatureand pH-controlled association of terpolymers of N-isopropylacrylamide (NIPA) with 1-vinylimidazole (VI) and polyethylene glycol (PEG) has been investigated by light scattering and atomic force microscopy (AFM) in situ. The polymers contained 0–15 mol% VI and 0–2 mol% PEG. The phase transition temperatures (Tp) have been in the range of 32–45 8C and exhibited significant dependence on...

We report a systematic investigation about the mechanism of pH sensing using SnO2 nanobelt field effect transistors (FETs). The FETs, based on single SnO2 nanobelts, are channel-limited and with proper contact passivation; the pH sensing was conducted with sodium phosphate solutions through integrated microfluidics. The responses of the FET channel conductance to pH were measured at different g...

OBJECTIVE Notch signaling has been implicated in the development of pulmonary arterial hypertension (PH) as reflected by increased expression of Notch member proteins that induce the proliferation of pulmonary arterial smooth muscle cells (PASMCs). Soluble Jagged1 (sJag1) has been shown to inhibit Notch signaling in vitro and in vivo; however, its capacity to suppress PH remains unknown. APPR...

An acidic polyelectrolyte, gum tragacanth (GT) , was found to stabilize polystyrene latex particles due to a steric stabilization mechanism. The stability depends significantly on the pH of the solution. To elucidate the stabilization mechanism, a number of parameters, such as the adsorption isotherm, the zeta potential, and the conformation were measured as a function of pH. The adsorption iso...

and partly results of my Ph. D. student Richard Cleyton. It is a pleasure to thank the Erwin Schrrdinger Institute and the organisers of the program on Holonomy Groups in Diierential Geometry for their kind hospitality.