Incorporation of Na235SO4 by ovine brain Ficoll-prepared synaptosomes were studied as a function of time, temperature and substrate concentration. The rate of uptake obeyed Michaelis-Menten kinetics and apparent Km value of 4.4 mM Na2SO4 was determined. In the presence of p-hydroxymercuribenzoate a reduction in sulphate uptake was noted which suggests that thiol groups may possibly be implicate...

The physiological ligands for Na,K-ATPase (the Na,K-pump) are ions, and electrostatic forces, that could be revealed by their ionic strength dependence, are therefore expected to be important for their reaction with the enzyme. We found that the affinities for ADP3-, eosine2-, p-nitrophenylphosphate, and V(max) for Na,K-ATPase and K+-activated p-nitrophenylphosphatase activity, were all decreas...

Ionic diffusion coefficients in the membrane are needed for modelling of ion transport ion-exchange membranes (IEMs) with Nernst-Planck equation. We have determined ionic Na+, OH?, H+, Cl?, SO42?, NaSO4?, and HSO4? from experiments dilute NaCl, NaOH, HCl, Na2SO4, H2SO4 solutions through IEMs conductivity measured these solutions, using electrochemical impedance spectroscopy. The order fluxes ac...

objective: salt stress is a world-wide problem and soil salinity is common in arid and semi-arid regions. this study was undertaken to investigate salt tolerance in salsola orientalis in laboratory and natural conditions and recognize the mechanisms that allow it to tolerate these conditions. methods: this study had two parts of greenhouse and natural habitats. the treatment solutions for salin...

Salinity may strongly influence the interaction between plant roots and surrounding soil, but this has been poorly studied for sodium sulfate (Na2SO4). The aim of study was to investigate effect chloride (NaCl) Na2SO4 salinities on soil chemical properties as well rice physiological- yield-related parameters two contrasted cultivars (V14 (salt-sensitive) Pokkali (salt-resistant)). Pot experimen...