a pvc membrane cr(iii) ion selective electrode has been constructed using 2h-1,4-benzothioazine-2,3(4h)dione dioxime (btd) as membrane carrier. the influence of membrane composition on the electroderesponse was studied. the electrode exhibits a nernstian response over a cr(iii) concentration range of 1.0 x10 6 to 1.0>< 10-1 m (r = 0.99) with a slope of 19.5 ± 0.5 mv per decade of concentration,...

HCN channels are thought to be structurally similar to Kv channels, but show much lower selectivity for K+. The approximately 3.3 A selectivity filter of K+ channels is formed by the pore-lining sequence XT(V/I)GYG, with X usually T, and is held stable by key residues in the P-loop. Differences in the P-loop sequence of HCN channels (eg. the pore-lining sequence L478C479IGYG) suggest these resi...

In the present study, a modified Structure Function was introduced. In this modified Structure Function model, the coefficient of model was computed dynamically base on the coherent structure in the flow field. The ability of this Modified Structure Function was investigated for complex flow over a square cylinder in free stream and a low aspect ratio cylinder confined in a channel. The Results...

Bu çalışmanın amacı Arsuz Ovası topraklarının tuzluluk ve alkalilik ile ilgili özelliklerinin belirlenmesi topraklarda değişebilir sodyum oranı (ESR) adsorpsiyon (SAR) arasındaki ilişkilerin incelenmesidir. Çalışmada ovası 0-30 cm derinliğinden 37 adet bozulmuş toprak örneği alınmıştır. Alınan örneklerinde; pH, elektriksel iletkenlik (EC), (Na) potasyum (K), katyon değişim kapasitesi (KDK), eri...