Biokémia

Analysis of a complex chemical compound

On the basis of the chemical principle of carbonic anhydrase (CA)-aromatic sulfonamide inhibitor interaction, a dansylamidoethyl-pendant cyclen(1-(2-(5-(dimethylamino)-1-naphthalenesulfonamido)ethyl)-1,4,7,10-tetraazacyclododecane, HL) was synthesized as a novel type of zinc(II)-fluorophore. The new ligand forms very stable complexes with zinc(II), cadmium(II), and copper(II) at physiological pH. The X-ray crystal study of the Zn complex disclosed a five-coordinate, distorted square-pyramidal structure with the deprotonated dansylamide N-coordinating at the apical site.

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Micro-analysis on 0.5 mm/500 micron spot size areas of calcium vitamin supplement sample to demonstrate data discrepancies on uneven or less-than-ideal analysis surfaces

Standard analysis areas for XRF are somewhere between 30 and 40 mm in diameter. In an ideal world, every XRF sample would be perfectly smooth and flat with a polished or machined surface for a perfect fluorescence event to take place for optimal data output. Unfortunately, finding a sample in ideal condition or even large enough to ensure a homogenous reading across the whole 30 to 40mm measurement surface is very difficult. This is where having beam collimation or spot size selection capabilities, like those found in the Rigaku ZSX Primus II WD-XRF Spectrometer, becomes extremely useful.

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In-situ analysis: High temperature · Low temperature · Variable humidity · Reactive gases · Combined XRD/DSC

The ability to measure samples under specific non-ambient conditions is essential in the research and development of many advanced materials. The Ultima IV has a wide range of fully integrated non-ambient configurations, including the world's only commercially available combined XRD/DSC system.

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X-ray microdiffraction of the crystalline structure forming a tooth

X-ray diffraction measurements of enamel and dentin, which are the major tissues of a tooth, indicate that they are mostly made of hydroxyapatite. It is not very well known that external treatments, such as laser irradiation, may alter the structure of these components. X-ray microdiffraction is useful to observe the localized influence of laser irradiation on the enamel.

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Analysis of the structure of an organic compound with a long unit cell axis

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Nanotest Hungary Kft.

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