The title compound, (CH6N3)7H9[PtMo6O24]2·7H2O, containing the well-known Anderson-type heteropolyoxomolybdate, was obtained by recrystallization of its powdered guanidinium salt. The protonated O atoms in the polyanion were confirmed by electron-density maps, inter-polyanion hydrogen bonds and bond-valance sums (BVS). The {[H4.5PtMo6O24]2}(7-) polyanion is the same as that already characterize...

Over the last couple of decades, it has become a commonplace to claim that “institutions matter” for economic development. Yet, institutions are not exogenous but the result of human action. It is argued here that the values and norms held by substantial parts of society’s members are an important determinant of its institutions. It is further argued that values and norms have both a direct and...

The title compound, C12H11N3O2, is a second monoclinic polymorph (P21, with Z' = 4) of the previously reported monoclinic (P21/c, with Z' = 2) form [Akhmad Aznan et al. (2010 ▶). Acta Cryst. E66, o2400]. Four independent mol-ecules comprise the asymmetric unit, which have the common features of a syn disposition of the pyridine N atom and the toluene ring, and an intra-molecular amine-nitro N-H...

The structure of the title mol-ecular salt, C10H13N4+·N3-, has been redetermined from the data published by Qian & Huang [Acta Cryst. (2010), E66, o3086; refcode WACMIY (Groom et al., 2016)]. The improvement of the present redetermination consists in a correction of the site-occupancy parameter of the bridging H atom between the pyridine rings, as well as of its position. The present study has ...

The title complex, [Cu(C(13)H(10)ClN(2)O)(H(2)O)]NO(3)·H(2)O, was obtained by the reaction of 5-chloro-salicyl-aldehyde, 2-(amino-meth-yl)pyridine and copper nitrate in methanol. The first reported polymorph of this complex was triclinic [Liang et al. (2010 ▶). Acta Cryst. E66, m40]. The present polymorph crystallized in the monoclinic space group P2(1)/c. The Cu(II) ion is in a square planar e...

Spatial patterns at the landscape scale have been documented in a wide variety of ecosystems across many parts of the world. Mathematical models have played an important role in understanding the causes of these patterns, and their implications for ecosystem change as environmental parameters vary. Preliminary results from simulation studies suggest the possibility of hysteresis, meaning that t...

A second monoclinic polymorph of 2,4-dimethyl-anilinium chloride, C(8)H(12)N(+)·Cl(-), (I), is reported. The unit-cell dimensions differ from those of the first reported monoclinic form, (II) [Yao (2010 ▶). Acta Cryst. E66, o1563]. Nevertheless, both compounds crystallize in the monoclinic space group P2(1)/n. As in (II), the protonated amine group in (I) acts as a hydrogen-bond donor to the ch...

Jaagsiekte sheep retrovirus (JSRV) uses hyaluronidase 2 (Hyal2) as a cell entry receptor. By making inactivating mutations to the catalytic residues of human Hyal2, we found that hyaluronidase activity was dispensable for its receptor function. The affinities of the JSRV envelope glycoprotein for Hyal2 and the Hyal2 mutant were similar, and hyaluronan did not block either high-affinity interact...

TOPIC: Chest Infections TYPE: Medical Student/Resident Case Reports INTRODUCTION: Cryptococcal pneumonia is an opportunistic fungal infection caused by Cryptococcus neoformans. Many cases initially present in the lungs of those suffering from HIV/AIDS, diabetes, or on chronic immunosuppressants1. We a case 28-year-old woman with no prior medical history who develops severe cryptococcal factors ...