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FCS Helps to Track Individual Molecules
During Polystyrene Formation

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Lynn M. Savage

Polymers are very important, whether they are artificial (plastics) or natural (proteins). Various techniques have been used to explore the processes involved in the formation of polymers from simpler molecules. Nuclear magnetic resonance, electron spin resonance and fluorescence spectroscopies can provide information about polymerization kinetics, for example, but only by averaging information from bulk ensembles of monomers as they convert to polymers. Images acquired with an inverted microscope and a CCD camera indicate the movement of dye molecules amid styrene molecules as they...Read full article

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    Published: February 2008
    Glossary
    nuclear magnetic resonance
    A phenomenon, exploited for medical imaging, in which the nuclei of material placed in a strong magnetic field will absorb radio waves supplied by a transmitter at particular frequencies. The energy of the radio-frequency photons is used to promote the nucleus from a low-energy state, in which the nuclear spin is aligned parallel to the strong magnetic field, to a higher-energy state in which the spin is opposed to the field. When the source of the radio waves is turned off, many nuclei will...
    energyFeaturesMicroscopynuclear magnetic resonancepolymerization kineticspolymers

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