In the present study we report dosimetric properties of iodized salt aiming at using it as an accidental luminescent dosimeter. It was found that the very good sensitivity of its main dosimetric peak is strongly affected by thermal treatments. This is also the case for OSL emission. The sensitivity loss due to heating implies that caution should be exercised while applying single aliquot protoc...

The crystal structure of the wild-type nucleoside diphosphate kinase from Mycobacterium tuberculosis at 2.6 Å resolution revealed that the intersubunit salt bridge Arg80-Asp93 contributes to the thermal stability of the hexamer (Tm = 76°C). On mutating Asp93 to Asn to break the salt bridge, the thermal stability dramatically decreased by 27.6°C. Here, on mutating Arg80 to Asn, the thermal stabi...

Deterrent B, a compound apparently involved in the resistance of Melilotus infesta to the sweetclover weevil Sitona cylindricollis, has been isolated from leaves by a combination of preparative paper chromatography, sublimation, and crystallization. The compound has been identified as ammonium nitrate. Isolated deterrent B and ammonium nitrate have identical feeding deterrent activities. Althou...

(PPN)2C 16S18 was obtained by the addition of PPN+C1_ to a methanolic extract of Na2C4Sv, de­ rived from the reaction of C6S80 2 and NaOMe. Centrosymmetric C 16Si84consists of thiophene units unsymmetrically fused to two 1,4-dithiin rings. Solutions of C 16S]84~ convert to C8S82~ with heating. When C4S* (x ~ 8) is reduced by Na/NH3 followed by extraction and crystallization, one ob­ tains the b...

Single crystals of the title mol-ecular salt, C4H7N2 (+)·HC2O4 (-)·2H2O, were isolated from the reaction of 2-methyl-1H-imidazole and oxalic acid in a 1:1 molar ratio in water. In the crystal, the cations and anions are positioned alternately along an infinite [010] ribbon and linked together through bifurcated N-H⋯(O,O) hydrogen bonds. The water mol-ecules of crystallization link the chains in...

This chapter presents a history of observations that crystallization can go well beyond the simple ‘expected’ behaviour found in the salt cellar or when you buy a chemical. Biomorphs, crystal gardens, ‘crystal souls’, but also the remarkable pattern and structures of biominerals made researchers think that there is something beyond the concept of the bare three-dimensional regularity of molecul...

The asymmetric unit of title hydrated salt, C22H46N4 (2+)·2Cl(-)·4H2O, comprises half a centrosymmetric dication, one Cl(-) anion and two water mol-ecules of crystallization. The structure determination reveals that protonation has occurred at diagonally opposite amine N atoms, and that the dication features intra-molecular N-H⋯N hydrogen bonds. In the crystal, a three-dimensional artchitecture...

The title salt, C(10)H(7)N(2) (+)·HSO(4) (-), is formed by the transfer of a proton from H(2)SO(4) to the N atom of 2-cyano-quinoline during crystallization. The quinoline ring system is approximately planar with a maximum deviation of 0.013 (3) Å. In the crystal, the cations are linked to the anions via inter-molecular N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, forming a layered network.

The differential solubility of macromolecules governs their crystallization and is thus of great importance to crystallography (Blundell and Johnson, 1976; McPherson, 1982, 1985a,b, 1990; Feher and Kam, 1985; Giegé and Mokol, 1989; Ollis and White, 1990; Giegé and Ducruix, 1992; Giegé et al., 1994). In addition, precipitation is widely applied as a fractionation method for the purification of m...