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  2. Heart rate monitor - Wikipedia

    en.wikipedia.org/wiki/Heart_rate_monitor

    X-ray image of a chest strap (left: frontal view; right: side view). Visible is the circuit board, the antenna for data transfer, the battery and the connections to the electrodes in the adjoining belt at picture top and bottom. Modern heart rate monitors commonly use one of two different methods to record heart signals (electrical and optical).

  3. Euthyroid sick syndrome - Wikipedia

    en.wikipedia.org/wiki/Euthyroid_sick_syndrome

    FT4 levels may have a transient increase, before becoming subnormal during severe illness. Correspondingly, in the majority of cases calculated sum activity of peripheral deiodinases (SPINA-GD) is reduced. [7] [20] [21] [22] Generally the levels of free T3 will be lowered, followed by the lowering of free T4 in more severe disease.

  4. Homopolar motor - Wikipedia

    en.wikipedia.org/wiki/Homopolar_motor

    A homopolar motor made with a battery cell and a coiled wire. DIY simple homopolar motor made with a drywall screw, a battery cell, a wire, and a disk magnet. The magnet is on the screw head.

  5. Polar fleece - Wikipedia

    en.wikipedia.org/wiki/Polar_fleece

    Polar fleece is a soft fabric made from polyester that is napped and insulating. PolarFleece is a trademark registered by Malden Mills (now Polartec, LLC) with the United States Patent and Trademark Office on October 6, 1981. [ 1 ]

  6. Polar body - Wikipedia

    en.wikipedia.org/wiki/Polar_body

    Semidiagrammatic. z.p. Zona pellucida. p.gl. Polar bodies. a. Two-cell stage. b. Four-cell stage. c. Eight-cell stage. d, e. Morula stage. A polar body is a small haploid cell that is formed at the same time as an egg cell during oogenesis, but generally does not have the ability to be fertilized. It is named from its polar position in the egg.

  7. Chemical polarity - Wikipedia

    en.wikipedia.org/wiki/Chemical_polarity

    Polar molecules must contain one or more polar bonds due to a difference in electronegativity between the bonded atoms. Molecules containing polar bonds have no molecular polarity if the bond dipoles cancel each other out by symmetry. Polar molecules interact through dipole-dipole intermolecular forces and hydrogen bonds.

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