New liquid-crystalline materials with a perhydroazulene core were synthesized and the stereochemistry of these compounds was investigated. The mesomorphic properties of the new LC compounds were investigated by differential scanning colorimetry, polarizing optical microscopy and X-ray diffraction. We report here on the LC properties of nonchiral materials, which predominantly exhibit smectic ph...

To assess the effects of functional protein on osteoblast, Large quantity of high-purity osteoblasts had been cultivated successfully by adopting sequential enzyme digestion. The growth curve of osteoblasts was protracted by cell counting. Proliferation of osteoblasts was assessed by MTT colorimetry. The experimental results show the functional protein can enhance proliferation, the properties ...

Tristimulus values (TSV) form the basis of colorimetry. They are transformed to other colorimetric coordinates for industrial applications such as colour specification, colour quality control, colour difference evaluations, device characterization for cross-media colour reproduction and recipe formulation. Accurate calculation of TSVs is highly desired by industry for open environment communica...

BACKGROUND There have been very few studies, with contradictory results, on the zinc status of children and adolescents with type-1 diabetes mellitus. The objective of this cross-sectional study was to determine zinc status based on the serum zinc concentration in type-1 diabetic children and adolescents and compare it with that of healthy controls. METHODS Thirty children and adolescents wit...

For this direct colorimetry of urinary oxalate, commercially available oxalate oxidase (EC 1.2.3.4) is used. The urine is first diluted, to diminish the effect of interfering substances. Analytical recovery of oxalate from urines with five different oxalate concentrations (0.4 to 2.0 mmol/L) ranged from 92 to 109% (mean 99%). The within-day and between-day precision (CV) of the method for a wid...

THE GONIO-SPECTROCOLOR METER An instrument dedicated to colour measurement, notably on varnished paintings, was developed at the C2RMF, a dozen years ago, at the initiative of Michel Menu, with the help of Alain Chiron and Françoise Viénnot from the Photobiology Laboratory of the MNHN[1]. One of the objectives was to reduce the influence of specular scattering due to the protective varnish. The...