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Juices extracted from red beet roots were analysed in the study. They were produced from 7 different hatches of cv. Czerwona Kula from the harvest of 2002 and 11 different cultivars cultivated tinder identical conditions in 2005. Contents of red and yellow pigments as well as antioxidant capacity were determined in juices. A very wide variation was observed in antioxidant capacity (10.2-21.7 μmol Trolox/mL) and contents of red pigments (0.57-1.63 mg/mL) and yellow pigments (0.31-0.95 mg/mL). In comparison to other vegetables, the antioxidant capacity of beets was very high A highly significant correlation was demonstrated between antioxidant capacity and contents of red pigments, whereas a remarkably less tangible relationship was found between antioxidant capacity and contents of yellow pigments. This indicates that primarily red betanin is responsible for the antioxidant capacity of red beets. [ABSTRACT FROM AUTHOR]

Abstract: The magneto-optic Cotton-Mouton effect constant C, light refraction index n and density ρ of binary solutions of toluene in carbon tetrachloride, α-picoline and β-picoline in 1,4-dioxane have been measured at different concentrations. The results have been used for the calculation of the molar C M constants of the solutions. By extrapolating the values C M = C M(f 2) for the concentration f 2 →0, the constant ∞ C 2 M = gas C 2 M of the dipolar component of the solution has been found, which is interpreted as the Cotton-Mouton gas constant. For all solutions, the reduction factors of the dissolved component have been calculated and their linear dependence on the solution concentration has been found. [Copyright &y& Elsevier]

In the title compound, C12H9ClN4O5, both nitro groups are rotated significantly from the imidazole plane. The C-4—NO2 bond length is only slightly shorter than the value for a normal single C sp2—NO2 bond and the C-5—NO2 bond length is significantly shorter than C-4—NO2. In consequence, the C-4-nitro group is easily replaced by morpholine, while the C-5-nitro group shows an extraordinary stability on treatment with the amine. In the crystal structure, the mol­ecules are linked through C—H⋯O hydrogen bonds. [ABSTRACT FROM AUTHOR]

The absolute configuration of the title compound, C24H23NO2, has been confirmed as 3 R,4 R. The hydroxy­methyl group and phenyl ring at the asymmetric C atoms exhibit α and β orientations, respectively, and the non-planar heterocyclic ring of the tetra­hydro­isoquinoline system adopts an envelope conformation. The crystal structure is stabilized through hydrogen bonds. [ABSTRACT FROM AUTHOR]

ZnS is a versatile wide-gap semiconductor that shows remarkable chemical stability against oxidation and hydrolysis. These properties are retained when the particle size steps down to 10 nm and below, and thus ZnS nanoparticles are interesting entities for optical and catalytic functions, where they might be exposed to quite aggressive environments. Moreover, ZnS may be doped by a host of elements, so that the electrical and optical properties can be tuned over an extended range. Neither Zn nor S are in short supply, and ZnS as compound or in view of the constituting elements is not toxic. Therefore, functional materials based on ZnS will be ideal for "green chemistry" applications, since they are suited also for large scale manufacture and will pose no additional problems when released into the environment. The article describes first results for ZnS-nanoparticles acting as electrocatalysts, a field that has not been covered so far by ZnS-derived materials. The catalytic action is evaluated for the decomposition of ethanol, a potentially abundant fuel for mobile electricity generation, since it can be fabricated by fermentation from a broad range of organic materials.

The structure analysis of the title compound, C(16)H(19)N(3)O(3), has been undertaken in order to facilitate the inter-pretation of (1)H and (13)C NMR data and to determine the position of the morpholine residue in this nucleophilic substitution product. The main result is that the morpholine group, with a chair conformation, is connected at the 4-position of the pyridazine ring. The benzene and pyridazine rings make a dihedral angle of 62.17 (5)°. Mol-ecules are linked into a two-dimensional network by non-classical C-H⋯O hydrogen bonds, in which O atoms serve as double or triple acceptors.