purpose: to evaluate the effect of childhood corneal opacity on the anteroposterior length of the globe in adulthood. methods: twenty-three patients with significant unilateral corneal opacity which had developed before the age of 6 years and the normal fellow eyes (controls) were evaluated. a comprehensive ocular examination including measurement of anterioposterior length and anterior chamber...

Main-group complexes are shown to be viable electrocatalysts for the H2 -evolution reaction (HER) from acid. A series of antimony porphyrins with varying axial ligands were synthesized for electrocatalysis applications. The proton-reduction catalytic properties of TPSb(OH)2 (TP=5,10,15,20-tetra(p-tolyl)porphyrin) with two axial hydroxy ligands were studied in detail, demonstrating catalytic H2 ...

Redox processes in complex transition metal-containing species are often intimately associated with changes in ligand protonation states and metal coordination number. A major challenge is therefore to develop consistent computational approaches for computing pH-dependent redox and ligand dissociation properties of organometallic species. Reduction of the Co center in the vitamin B12 derivative...

Resonance Raman spectroscopy and step-scan Fourier transform infrared (FTIR) spectroscopy have been used to identify the ligation state of ferrous heme iron for the H93G proximal cavity mutant of myoglobin in the absence of exogenous ligand on the proximal side. Preparation of the H93G mutant of myoglobin has been previously reported for a variety of axial ligands to the heme iron (e.g., substi...

The resonant Raman active mode identified in numerous studies as the heme iron-histidine stretch has been systematically investigated in the Raman spectrum of 15 exogenous ligands to the heme iron in the myoglobin proximal cavity mutant H93G. Mutation of the native histidine 93 of myoglobin to glycine (H93G) creates a cavity at the heme iron that can be filled with exogenous ligands. Substitute...

an investigation was conducted on hemin modified with axial ligand loaded onto magnetic carriers which created a kind of visible-light activated photocatalyst with good magnetic property. this photocatalyst exhibits excellent photo-degradation performance and can be readily reclaimed in the degradation of bis-phenol a (bpa) in aqueous solution under visible light. the catalysts were characteriz...

The organotin(IV) compounds, [Ph3SnL H]n Æ nCCl4 (1), [Me2SnL (OH2)] (2), [ Bu2SnL ] (3), [Ph2SnL ]n (4), [Ph3SnL H]n (5) and [Ph3SnL H]n (7) (L 1 = 2-{[(2Z)-(3-hydroxy-1-methyl-2-butenylidene)]amino}phenylpropionate and L 3 = 2-{[(E)-1-(2-hydroxyaryl)alkylidene]amino}phenylpropionate), were synthesized by treating the appropriate organotin(IV) chloride(s) with the potassium salt of the ligand ...

We report DFT, semi-empirical and molecular mechanics calculations on the binding of Cu(II) to tetrapeptide DAHK, testing ability each predict coordination mode, conformation electronic spectra. • Testing computational models for predicting DAHK. LFMM generates accurate geometry but DFT required energy. Semi-empirical methods wrongly 3N2O coordination. Ligand Field Molecular Mechanics (LFMM), D...

An octahedral cobalt(III) complex, trans-[(Me2bpb)Co(bzlan)2]ClO4 (1), with H2Me2bpb = N,N’-(4,5-dimethyl-1,2-phenylene)dipicolinamide and bzlan = benzylamine, has been synthesized and characterized by elemental analyses, IR, UV-Vis, and 1H NMR spectroscopy. The structure of this complex has been determined by X-ray crystallography. The Me2bpb2– is a di-anionic tetradentate ligand furnishing a ...

The heme coordination of ovine prostaglandin H synthase (PGHS) has been characterized by EPR, magnetic circular dichroism, resonance Raman, and optical spectroscopies. The EPR spectrum of ferric PGHS is consistent with an equilibrium mixture of high-spin and low-spin heme species. Both species disappear on reaction of the synthase with hydroperoxides. The high-spin to low-spin interconversion i...