A slow ionic current carried by calcium, sodium, or both constitutes transmembrane ionic flow through the slow channel; such a current may be involved in normal action potentials of sinus and atrioventricular (AV) nodal cells. In this study, we investigated the effects of the slow-channel inhibiting agents verapamil, D600, manganous chloride, and lanthanum chloride on sinus node automaticity an...

Grain amaranth (Amaranthus hypochondriacus L.) is abundant in oxalate and can secrete oxalate under aluminium (Al) stress. However, the features of Al-induced secretion of organic acid anions (OA) and potential genes responsible for OA secretion are poorly understood. Here, Al-induced OA secretion in grain amaranth roots was characterized by ion charomatography and enzymology methods, and suppr...

Ca(2+)/calmodulin transduction pathways have been implicated in mediating stress response and tolerance in plants. Here, three genes encoding calmodulin (Cam) members of the EF-hand family of Ca(2+)-binding proteins were identified from Oryza sativa L. databases. Complementary DNA for each of the calmodulin genes, OsCam1, OsCam2, and OsCam3 were sequenced. OsCam1 and OsCam2 encode a conventiona...

This study was planned to estimate the performance of three zinc fertilizers [Zn sulfate heptahydrate (non-chelated), Zn- EDTA and Zn-humate (chelated)] at four levels (0, 2.5, 5.0, 7.5 mg kg-1) on use efficiency, availability crop productivity with rice. Field trials were conducted in clay loam sandy textured soils using factorial randomized block design (FRBD) replications. Data recorded yiel...

BACKGROUND AND OBJECTIVES Management of hyperphosphatemia, a predictor of mortality in chronic kidney disease, is challenging. Nonadherence to dietary phosphate binders, in part, contributes to uncontrolled serum phosphorus levels. This phase IIIb trial assessed the efficacy of increased dosages (3000 to 4500 mg/d) of reformulated lanthanum carbonate (500-, 750-, and 1000-mg tablets) in nonresp...

The axoplasm of the neurons of Penplaneta amencana contains numerous neurotubules which are morphologically similar to the microtubules found in non-nervous tissues after sectioning or negative staining. In cross-sections of fixed material such tubules usually appear as electron-dense circles containing a less dense core and surrounded by a non-opaque ' clear zone'. However, when cockroach gang...

Anionic lanthanide chloride clusters, Ln(n)Cl(3n+1)(-), were produced by electrospray ionization (ESI) of LnCl(3) in isopropanol, where Ln = La-Lu (except Pm); the clusters were characterized using a quadrupole ion trap mass spectrometer. High-abundance "magic number" clusters were apparent at n = 4 for the early Ln (La-Sm), and at n = 5 for the late Ln (Dy-Lu). Density functional theory comput...

Libraries of lanthanide complexes supported by nitrogen and oxygen containing ligands have been synthesised using a high-throughput approach. The complexes were employed in the ring-opening polymerisation of epsilon-caprolactone, in some cases giving polycaprolactone of controlled molecular weight and narrow polydispersity. The libraries, based on twenty-one ligands and eight lanthanide reagent...

A highly sensitive spectrophotometric procedure for the estimation of lanthanum in aqueous medium has been established. The method was involved reaction with bromopyrogallol as chelating agent presence cetylpyridinium chloride at pH4.61 to produce a soluble blue colour ternary complex exhibited maximum absorption 661nm. adheres Beer's low over concentration range 0.125 –5.0 μg/ml coefficient de...