H, K, Rb, and Li inhibit Na-dependent alanine influx across the brush border of rabbit ileum. Kinetic analysis indicates that H and K behave as competitive inhibitors of influx so that increasing the concentration of H or K in the mucosal solution is kinetically indistinguishable from decreasing the Na concentration. In addition the coupling between alanine and Na influxes is markedly reduced a...

The transport properties of mitochondria are such that net potassium flux across the inner membrane determines mitochondrial volume. It has been known that K+ uptake is mediated by diffusive leak driven by the high electrical membrane potential maintained by redox-driven, electrogenic proton ejection and that regulated K+ efflux is mediated by an 82-kDa inner membrane K+/H+ antiporter. There is...

Thermal behavior of various solid feldspars are different, namely those of bivalent cations show no change in the distribution of Al and Si atoms, whereas feldspars of univalent cations become more disordered with raising temperature. In the latter case Al atoms migrate from the sites they occupe at low temperatures and interchange positions with the Si atoms. At high temperatures (but stil...

thermal behavior of various solid feldspars are different, namely those of bivalent cations show no change in the distribution of al and si atoms, whereas feldspars of univalent cations become more disordered with raising temperature. in the latter case al atoms migrate from the sites they occupe at low temperatures and interchange positions with the si atoms. at high temperatures (but still be...

A method to create compositionally disordered compounds with a high number of cations in the matrices, that utilize cubic spatial symmetry garnet-type crystalline systems is demonstrated. Mixtures powdered materials solely doped Ce were used atomic compositions complexity. Several mixed systems, namely Gd3Al2Ga3O12/(Gd,Y)3Al2Ga3O12, Y3Al5O12/Gd3Al2Ga3O12, and Y3Al5O12/Y3Al2Ga3O12 annealed, comp...

We have studied soft-x-ray absorption in coronene and singly hydrogenated cations. Hydrogenation on the one hand closes occupied molecular orbital of radical cation thus decreases reactivity molecule. On other hand, additional H atom breaks ${D}_{6h}$ symmetry exhibits a comparably small binding energy. The effect single hydrogenation photoionization is therefore hard to predict. In our experim...

Trees have a strong influence on the chemical properties of soil in which they grow. Establishing plantations with different tree species combinations thus potentially leads to divergence chemistry. To study degree differentiation already occurs during first years after establishment, we made use biodiversity–ecosystem functioning experiment Belgium, FORBIO. The multi-site replicates richness (...