Soft X-ray Photochemistry at the L₂,₃-edges in K₃[Fe(CN)₆], [Co(acac)₃] and [Cp₂Fe][BF₄]

Soft X-ray photoreduction has been observed in K3[Fe(CN)6], [Co(acac)3] and [Cp2Fe][BF4]

Gender-dependent differences in plasma matrix metalloproteinase-8 elevated in pulmonary tuberculosis.

Tuberculosis (TB) remains a global health pandemic and greater understanding of underlying pathogenesis is required to develop novel therapeutic and diagnostic approaches. Matrix metalloproteinases (MMPs) are emerging as key effectors of tissue destruction in TB but have not been comprehensively studied in plasma, nor have gender differences been investigated. We measured the plasma concentrations of MMPs in a carefully characterised, prospectively recruited clinical cohort of 380 individuals. The collagenases, MMP-1 and MMP-8, were elevated in plasma of patients with pulmonary TB relative to healthy controls, and MMP-7 (matrilysin) and MMP-9 (gelatinase B) were also increased. MMP-8 was TB-specific (p<0.001), not being elevated in symptomatic controls (symptoms suspicious of TB but active disease excluded). Plasma MMP-8 concentrations inversely correlated with body mass index. Plasma MMP-8 concentration was 1.51-fold higher in males than females with TB (p<0.05) and this difference was not due to greater disease severity in men. Gender-specific analysis of MMPs demonstrated consistent increase in MMP-1 and -8 in TB, but MMP-8 was a better discriminator for TB in men. Plasma collagenases are elevated in pulmonary TB and differ between men and women. Gender must be considered in investigation of TB immunopathology and development of novel diagnostic markers

Direct Measurement of the High-spin and Low-spin Bond Lengths and the Spin State Population in Mixed Spin State Systems: An Fe K-edge XAFS Study of Iron(III) Dithiocarbamate Complexes

A combination of Fe K-edge XAFS and advanced data analysis methods has been used to determine the Fe-S distances and spin state population in iron(III) dithiocarbamate spin crossover complexes. This new approach allows for the first direct determination of Fe-S bond lengths (2.44(2) Å high-spin, 2.30(2) Å low-spin) for both spin state isomers in mixed spin systems in contrast to single crystal X-ray crystallographic determinations where only the weighted average of the HS and LS values is observed. The agreement between XAFS and magnetic susceptibility derived values of the spin state populations is very good. © 1999 Elsevier Science S.A

X-ray Absorption Fine Structure Study of the Bound State Electronic Transitions at the Vanadium K and L Edges in Low Symmetry, Molecular, Vanadium-(IV) and -(V) Complexes with Oxyoxime and Oxyoximate Ligands

A combination of vanadium K- and L-edge XAFS has been used to characterise a series of monomeric oxovanadium(IV), monomeric dioxovanadium(V) and dimeric oxovanadium(V) complexes with oxyoxime and oxyoximate ligands. The K- and L-edge spectra confirm the presence of V V in the dimeric species and the L-edge spectra have been used to discriminate between six-co-ordinate V-N-O-V bridged oxovanadium(V) dimers and seven-co-ordinate phenolate bridged oxovanadium(V) dimers containing η 2-N-O groups