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Polystyrene

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  • Do you see the complete picture?

    Gel permeation chromatography (GPC) or also named size exclusion chromatography (SEC) is the most often used method for determining the molecular weight of natural and synthetic macromolecules. One specific strength of this method lies in the fact that by the separation process the whole molecular weight distribution is obtained. The molecular weight distribution contains much larger information for the characterization of polymer samples compared to a single value. more

  • Good Reasons to Use ATR Libraries

    Transmission spectroscopy was the only method in general use until the early 1960s. The first applications of attenuated total reflection (ATR) or internal reflection spectroscopy were reported independently by Fahrenfort and Harrick. Especially macromolecular materials (rubbers, fibers, fabrics, coatings, laminates etc), which often failed to yield useful transmittance spectra, became accessible for infrared spectroscopic investigations by the ATR technique. Meanwhile, the ATR technique has been proven to be an extremely useful technique for material analysis and has become more widely used for all but gaseous samples. more

  • The Determination of Hazardous Substances According to RoHS and WEEE Directives

    1st July 2006 is an important deadline for the electro- and electronics industries. This date bans hazardous substances like lead, cadmium, mercury, hexavalent chromium and polybrominated biphenyls and diphenyl ethers from electro- and electronic equipment. This restriction, even though in discussion since 1991, has become more and more important from year to year because of tons of electronic waste releasing toxic substances which are accumulated in the environment, the food chain and all human beings. In order to enforce the substances ban and the limitation or substitution of hazardous components, elemental analysis is obviously the most important control measure for monitoring limiting values. This requires precise analytical systems such as X-ray fluorescence, ICP- and atomic absorption spectrometers. These instruments are able to detect trace concentrations of hazardous compounds - for example cadmium, using an atomic absorption spectrometer in the flame atomization mode up to 0.1 mg/L, or using the di more

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Websites Polystyrene

Peptide Synthesis, Peptide Synthesizers and Custom Synthesis from Activotec

Mynxx Optima Geneva Helvetica Lucida Georgia Trebuchet Palatino About Activotec Synthesizers Custom Peptides Chemicals Monthly draw winners More Info Welcome to Activotec. Activotec is a customer focussed peptide company Providing high technology products and services for chemistry and biochemistry more

HARTEG GmbH. Company information.

       Online catalogue of chemical compounds for research English Deutsch Český Company information Products and services Advantages for you Contact us Chemicals Dyes Plastics Company information HARTEG GmbH is a European chemical company that harnesses the power of science and technology to improv more

Activo-P14 Peptide Synthesizer - the world's smallest and lowest price peptide synthesizer

Mynxx Optima Geneva Helvetica Lucida Georgia Trebuchet Palatino Breadcrumbs Home / Synthesizers / Activo-P14 Peptide Synthesizer Activo-P14 Peptide Synthesizer - the world's smallest and lowest cost peptide synthesizer The Activo-P14 Peptide Synthesizer is an economical semi-automated instrument for more

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Definition

Polystyrene

Polystyrene Polystyrene is an aromatic polymer made from the aromatic monomer styrene , a liquid hydrocarbon that is commercially manufactured from petroleum by the chemical industry . Polystyrene is a thermoplastic substance, normally ... more

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