The central Sn(IV) atom of the penta-nuclear title complex, {[Sn(CH(3))(3)](3)O(2)C(CH(2))PO(3)[Sn(CH(3))(3)(H(2)O)](2)HO(2)C(CH(2))PO(3)}, is located on a twofold rotation axis; due to symmetry, the H atom of the carboxyl group of the anion is disordered with a site occupancy of 0.5. The central Sn(IV) atom is bonded to three methyl groups (one of which is disordered about the twofold rotation...

BACKGROUND Parkinson's disease (PD) is a neurodegenerative disorder that is characterized by degeneration of dopaminergic neurons in the substantia nigra (SN). Destruction of the SN can lead to gastric dyskinesis accompanied by decreased expression of choline acetyltransferase (ChAT) and increased expression of tyrosine hydroxylase (TH) in the dorsal vagus complex (DVC), which includes the dors...

We introduce a notion of lexicographic shellability for pure, balanced boolean cell complexes, modelled after the CL-shellability criterion of Björner and Wachs (Adv. in Math. 43 (1982), 87–100) for posets and its generalization by Kozlov (Ann. of Comp. 1(1) (1997), 67–90) called CC-shellability. We give a lexicographic shelling for the quotient of the order complex of a Boolean algebra of rank...

Adjacent units of the title polymeric complex, [Sn(C(7)H(6)F)(3)(C(8)H(12)NO(2)S(2))], are bridged by the carboxyl-ate ion into a helical chain running along the b axis. The Sn(IV) atom shows a distorted trans-C(3)SnO(2) trigonal-bipyramidal coordination and is displaced by 0.113 (2) Å out of the C(3)Sn girdle in the direction of the covalently bonded O atom. The ring is disordered of two posit...

New calculations are presented for Gamow-Teller beta decay of nuclei near 100 Sn. Essentially all of the 100 Sn Gamow-Teller decay strength is predicted to go to a single state at an excitation energy of 1.8 MeV in 100 In. The first calculations are presented for the decays of neighboring odd-even and odd-odd nuclei which show, in contrast to 100 Sn, surprisingly complex and broad Gamow-Teller ...

Granite-hosted magmatic-hydrothermal mineral deposits are major sources of Cu, Mo, Sn, Li, and W, originating via mineralizing fluids exsolved from volatile-saturated magmas. We show how trace elements in zircon sampled the granite-hosted Zaaiplaats tin deposit, Bushveld Complex, preserve a record both enrichment incompatible metals during magma fractionation those arising mineralization proces...

-The adsorption of Sn(IV)TPyP (mesotetrapyridylporphyrin) in sodium hectorite was studied using ultraviolet-visible and luminescence spectroscopy. The adsorbed complex was found to demetallate forming the TPyP dication as the clay is dehydrated. This process was found to be reversible indicating that the Sn 4+ ion remains in the vicinity of the porphyrin upon demetallation. The luminescence spe...

Afrikaans is a West Germanic language that originated in South Africa as descendent of Dutch. It displays discontinuous sentential negation (SN), where expressed by two phonologically identical negative particles appear different positions the sentence. The system argued to be an innovation came about through reanalysis discourse-dependent (pragmatically conditioned) structure Dutch, reinforced...

Cofacial bimetallic tin(ii) ([Sn2(mBDCA-5t)]2-, 1) and lead(ii) ([Pb2(mBDCA-5t)]2-, 2) complexes have been prepared by hexadeprotonation of hexacarboxamide cryptand mBDCA-5t-H6 together with double Sn(ii) or Pb(ii) insertion. Reaction of 1 with elemental sulfur or selenium generates di-tin polychalcogenide complexes containing μ-E and bridging μ-E5 ligands where E = S or Se, and the Sn(ii) cent...

Herein, we discuss the study of solvation dynamics of lithium-succinonitrile (SN) plastic crystalline electrolytes by ultrafast vibrational spectroscopy. The infrared absorption spectra indicated that the CN stretch of the Li(+) bound and unbound succinonitrile molecules in a same solution have distinct vibrational frequencies (2276 cm(-1)vs. 2253 cm(-1)). The frequency difference allowed us to...