The iodine content of several kinds of foods representing different product groups available on the Swiss market was analyzed by isotope dilution inductively coupled plasma mass spectrometry using the enriched long-lived nuclide I. Considerable variations in levels of iodine between single foodstuffs within food groups were found, which also applied for levels in different food groups. The cont...

A hypothetical model of the cytochrome c peroxidase.cytochrome c complex (Poulos, T. L., and Kraut, J. (1980) J. Biol. Chem. 255, 10322-10330) predicts charge interactions between aspartic acid residues of the peroxidase having a spatial distribution that is complementary to the distribution of essential and highly conserved residues of cytochrome c. In a first attempt to test this model, carbo...

In biotin deficiency, aspartic acid becomes a limiting factor in the growth of Streptococcus faecalis ATCC 9190. Suboptimal concentrations of L-aspartate in biotin-deficient medium produce partial growth followed by lysis, which is typical of cell wall lysis due to depletion of an amino acid essential for cell wall biosynthesis. D-Aspartate, which is utilized by the cells with considerable less...

In biotin deficiency, aspartic acid becomes a limiting factor in the growth of Streptococcus faecalis ATCC 9190. Suboptimal concentrations of L-aspartate in biotin-deficient medium produce partial growth followed by lysis, which is typical of cell wall lysis due to depletion of an amino acid essential for cell wall biosynthesis. D-Aspartate, which is utilized by the cells with considerable less...

A systematic study for the preparation and structural analysis of poly(styrene-co-acrylic acid) composite nanospheres (PSA) and silver nanoparticles loaded poly(styrene-co-acrylic acid) composite nanospheres (nAg@PSA) is reported. Poly(styrene-co-acrylic acid) nanospheres were synthesized by soap-free emulsion polymerization of styrene (St) and acrylic acid (AA) in water. Ag nanoparticles (Ag-N...

Inactivated copper-sensitive and copper-tolerant strains of Mucor rouxii cultured at high copper concentration were tested for their potential to adsorb Cu(II) ions from solution. We performed batch experiments to determine the pH profile for Cu(II) binding, binding capacity and the possibility of removing the Cu(II) that had been adsorbed. The biomasses studied showed a high affinity for Cu(II...

The title compound, {[Co(3)(C(6)H(4)NO(2))(2)(C(8)H(3)NO(6))(2)(H(2)O)(2)]·4H(2)O}(n), exhibits a two-dimensional layer-like structure in which the Co(II) ions exhibit two kinds of coordination geometries. One nearly octa-hedral Co(II) ion with crystallographic inversion symmetry is coordinated to six carboxyl-ate O atoms from four bridging 5-nitro-isophthalate (NIPH) ligands and two isonicotin...

In this work, a recoverable acrylamide-vinylamine copolymer immobilized TEMPO [P(AM-co-VAm)-T] catalyst for selective oxidation of cellulose with good catalytic performance and low degradation was developed. Firstly, the [P(AM-co-VAm)] prepared by Hofmann polyacrylamide (PAM). Then, condensation reduction reaction between amine groups P(AM-co-VAm) carbonyl 4-oxo-TEMPO yielded P(AM-co-VAm)-T. P(...