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  2. Differential scanning calorimetry - Wikipedia

    en.wikipedia.org/wiki/Differential_scanning...

    The cross-linking of polymer molecules that occurs in the curing process is exothermic, resulting in a negative peak in the DSC curve that usually appears soon after the glass transition. [15] [16] [17] In the pharmaceutical industry it is necessary to have well-characterized drug compounds in order to define processing parameters. For instance ...

  3. Amazon raises free shipping minimum for some non-Prime ... - AOL

    www.aol.com/amazon-raises-free-shipping-minimum...

    Amazon is raising its free shipping threshold for some customers.

  4. Liquid crystal - Wikipedia

    en.wikipedia.org/wiki/Liquid_crystal

    Liquid crystal lenses are a kind of adaptive optics. Imaging systems can benefit from focusing correction, image plane adjustment, or changing the range of depth-of-field or depth of focus. The liquid crystal lense is one of the candidates to develop vision correction devices for myopia and presbyopia (e.g., tunable eyeglass and smart contact ...

  5. Soft matter - Wikipedia

    en.wikipedia.org/wiki/Soft_matter

    Cartoon representation of the molecular order of crystal, liquid crystal, and liquid states. Soft matter consists of a diverse range of interrelated systems and can be broadly categorized into certain classes. These classes are by no means distinct, as often there are overlaps between two or more groups.

  6. Lyotropic liquid crystal - Wikipedia

    en.wikipedia.org/wiki/Lyotropic_liquid_crystal

    A highly viscous cubic phase gel made of polysorbate 80, water, and liquid paraffin. Lyotropic liquid crystals result when amphiphiles, which are both hydrophobic and hydrophilic, dissolve into a solution that behaves both like a liquid and a solid crystal. This liquid crystalline mesophase includes everyday mixtures like soap and water. [1] [2]

  7. Distortion free energy density - Wikipedia

    en.wikipedia.org/wiki/Distortion_free_energy_density

    The distortion free energy density in a nematic liquid crystal is a measure of the increase in the Helmholtz free energy per unit volume due to deviations in the orientational ordering away from a uniformly aligned nematic director configuration. The total free energy density for a nematic is therefore given by:

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