The mechanisms and control of transepithelial inorganic sulfate (Si) transport by primary cultures of chick renal proximal tubule monolayers in Ussing chambers were determined. The competitive anion, S2 O 3 2- (5 mM), reduced both unidirectional reabsorptive and secretory fluxes and net Si reabsorption with no effect on electrophysiological properties. The carbonic anhydrase (CA) inhibitor etho...

In the title compound, (NH(4))(2)[Fe(C(10)H(12)N(2)O(8))(H(2)O)]·3H(2)O, the Fe(II) center is in a distorted penta-gonal-bipyramidal geometry. Two carboxyl-ate O and two N atoms from the ethyl-enediaminetetra-acetate (EDTA) ion and one O atom from coordinated water comprise the equatorial plane. Two other carboxyl-ate O atoms from the EDTA ion occupy the apical sites. Both ammonium cations and ...

The title compound, C(6)H(18)N(2) (2+)·2C(6)H(4)NO(2) (-), consists of a doubly protonated hexa-methyl-enediammonium dication and two pyridine-2-carboxyl-ate anions. These ions inter-act by means of inter-molecular N-H⋯O and N-H⋯N hydrogen bonds to form a two-dimensional array. The carboxyl-ate groups of the anions appear to be delocalized on the basis of the C-O bond lengths.

alkali and alkaline earth metals hydrogen sulfate catalyzed the one-pot three component condensation reactions of aldehydes, 1,3-dicarbonyl compounds and urea or thiourea under solvent-free conditions leading to 3,4-dihydropyrimidin-2(1h)-ones in high yields at 80 °c. our results showed that biginelli reaction not only is ph dependent, but the cation of catalyst plays an important role.

Type structure of (H3N–R–NH3)2I3BiI6, which consists of sheets of organic entities together with triiodide anions separated by layers of BiI6 octahedra, is defined by triiodide, hexaiodobismuthate, and organic diammonium. The prototype structure of (H3N(CH2)2SS(CH2)2NH3)2I3BiI6 (1) can accommodate various changes according to the nature of the organic group, such as conformation, length or size...

Antioxidant activity test using two different methods namely 2,2-diphenyl-1-picrylhydrazyl and 2,2'-azinobis(3-ethylbenzothialozinesulfonate) diammonium salt free radical scavenging test has been carried out on three Cameroonian plant extracts used in the treatment of intestinal and infectious diseases: Pittosporum mannii Hook f. (Pittosporaceae), Vepris heterophylla R. Letouzey (Rutaceae) and ...

Applied Physical Chemistry, Department Technology, SE-100 44, Stockholm, Sweden. SP Process Development, Forskargatan, 151 Department of Applied Chemistry, Kumoh Gyeongbuk, Korea † Electronic supplementary information atomic parameters of the structure of th two 2D structures of butyl 1,4-dia 1,8-diammonium lead iodide along th S5–S11 and Fig. S3–S9 describe structura CIF les for the structure...

The title compound, {(C(8)H(20)N(2))[PbBr(4)]}(n), crystallizes as an inorganic-organic hybrid with alternating layers of diammonium cations and two-dimensional corner-sharing PbBr(6) octa-hedra extending parallel to the bc plane, which are eclipsed relative to one another. Both PbBr(6) octa-hedra and the organic cation exhibit symmetry. The cations inter-act via N-H⋯Br hydrogen bonding in the ...

The title Schiff base ligand, C(20)H(20)Cl(2)N(2), was prepared by condensation of commercially available p-chloro-benzalde-hyde and (R,R)-1,2-diammonium-cyclo-hexane mono-(+)-tartrate. The cyclo-hexane ring adopts a chair conformation. The dihedral angle between the two aromatic rings is 62.52 (8)°. The crystal structure is stabilized by an inter-molecular C-H⋯Cl hydrogen bond.

tRNATyr and tRNASer purified from bulk brewer's yeast tRNA were subjected to analysis by matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry. Choosing a mixture of 2,4,6- and 2,3,4-trihydroxy-acetophenone and diammonium citrate as matrix a mass resolution of up to 220 (FWHM) was achieved in the linear mode of operation. Cation adduct suppression by addition of cation ex...