The title mol-ecule, C(18)H(24)O(12), has crystallographic 2/m symmetry with two acetate group located on a mirror plane. The H-Csp(3)-O-Csp(2) torsion angles characterizing orientation of the acetyl groups with respect to the cyclo-hexane ring are 0.0, 23.9 and -23.9°. The cyclo-hexane ring is in a chair conformation with all substituents in equatorial positions. In the crystal, mol-ecules are...

The title compound, C14H14BrNO4, contains a tricyclic ring system including three contiguous stereocenters all of which exhibit an R configuration. The cyclo-hexa-none ring adopts a chair conformation. The central oxane ring assumes a strained envelope conformation, with five of the ring atoms being nearly coplanar with the bromo-phenyl group and with the C atom adjacent to the O atom and fused...

THE TITLE COMPOUND [SYSTEMATIC NAME: 3,3',6,6'-tetra-hydroxy-4,4'-dimethyl-1,1'-bi(cyclo-hexa-3,6-diene)-2,2',5,5'-tetra-one], C(14)H(10)O(8), was isolated from Tremella fuciformis. The mol-ecule has 2 symmetry, with the mid-point of the C-C bond linking the cyclo-hexa-dienedione rings located on a twofold rotation axis. In the mol-ecule, the ring is approximately planar, with an r.m.s. deviati...

In the title complex, {[Cu(SiF(6))(C(11)H(8)N(2)O)(2)]·2H(2)O}(n), the Cu(II) atom adopts an N(4)F(2)-octa-hedral coordination geometry with four pyridine N atoms in the equatorial sites and two F atoms in the axial sites. The di-3-pyridyl-methanone and hexa-fluoro-silicate ligands act as bidentate ligands, linking symmetry-related Cu(II) atoms. Water mol-ecules form O-H⋯O and O-H⋯F hydrogen bo...

Lipid A is one of the three components bacterial lipopolysaccharides constituting outer membrane Gram-negative bacteria, and recognized to have an important biological role in inflammatory response mammalians. Its activity modulated by number acyl-chains that are present lipid dielectric medium, i.e., type counter-ions, through electrostatic interactions. In this paper, we report on a coarse-gr...

A previous study (vijay, I. K., Perdew, G. H., and Lewis, D. E. (1980) J. BioL Chem. 255, 11210-11220) indicated that incubation of a membrane preparation from the lactating bovine mammary tissue with UDPISH]GlcNAc and GDP-[’“C]Man synthesized a series of lipid-linked saccharides that appeared to be related to one another as precursor products in the biosynthesis of asparagine-linked glycoprote...

â  â  â  â  narration elements in the story of mousa and khezr â  (based on character and time) â  â  sayyed reza solayman zadeh najafi * â  azim tahmasbi ** â  â  abstract â  â  the story consists of elements such as character and time and the story features. characters make story’s structure and there is not story without character . time element is also necessary for the story . each story...

in this work, a novel zr02+ pvc-based membrane sensor based on 4,7,13,16,21,24-hexa oxa-1,10- diazabicyclo[8,8,8]- hexa cosane (hodbhc) as a new ionophore is presented. the sensor displays a linear dynamic rangebetween 1.0x 10-1 and 1.0x10 6 m, with a near nernstian slope of 29.9 ± 0.4 mv per decade in an acidic solution(ph=1). the limit of detection is 8.0 x 1 0 7 m. the electrodes possess adv...