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  2. Prothrombin time - Wikipedia

    en.wikipedia.org/wiki/Prothrombin_time

    The prothrombin time ratio is the ratio of a subject's measured prothrombin time (in seconds) to the normal laboratory reference PT. The PT ratio varies depending on the specific reagents used, and has been replaced by the INR. [3] Elevated INR may be useful as a rapid and inexpensive diagnostic of infection in people with COVID-19. [4]

  3. Q10 (temperature coefficient) - Wikipedia

    en.wikipedia.org/wiki/Q10_(temperature_coefficient)

    A plot illustrating the dependence on temperature of the rates of chemical reactions and various biological processes, for several different Q 10 temperature coefficients. . The rate ratio at a temperature increase of 10 degrees (marked by points) is equal to the Q 10 coefficie

  4. Defining equation (physical chemistry) - Wikipedia

    en.wikipedia.org/wiki/Defining_equation...

    The labeling is arbitrary in initial choice, but once chosen fixed for the calculation. If any reference to an actual entity (say hydrogen ions H +) or any entity at all (say X) is made, the quantity symbol q is followed by curved ( ) brackets enclosing the molecular formula of X, i.e. q(X), or for a component i of a mixture q(X i).

  5. Platinum disulfide - Wikipedia

    en.wikipedia.org/wiki/Platinum_disulfide

    Platinum disulfide is the inorganic compound with the formula Pt S 2.It is a black, semiconducting solid, which is insoluble in all solvents.The compound adopts the cadmium iodide structure, being composed of sheets of octahedral Pt and pyramidal sulfide centers.

  6. Reaction rate constant - Wikipedia

    en.wikipedia.org/wiki/Reaction_rate_constant

    where A and B are reactants C is a product a, b, and c are stoichiometric coefficients,. the reaction rate is often found to have the form: = [] [] Here ⁠ ⁠ is the reaction rate constant that depends on temperature, and [A] and [B] are the molar concentrations of substances A and B in moles per unit volume of solution, assuming the reaction is taking place throughout the volume of the ...

  7. Partial thromboplastin time - Wikipedia

    en.wikipedia.org/wiki/Partial_thromboplastin_time

    The partial thromboplastin time (PTT), also known as the activated partial thromboplastin time (aPTT or APTT), is a blood test that characterizes coagulation of the blood.A historical name for this measure is the Kaolin-cephalin clotting time (KCCT), [1] reflecting kaolin and cephalin as materials historically used in the test.

  8. Sticking coefficient - Wikipedia

    en.wikipedia.org/wiki/Sticking_coefficient

    Sticking coefficient is the term used in surface physics to describe the ratio of the number of adsorbate atoms (or molecules) that adsorb, or "stick", to a surface to the total number of atoms that impinge upon that surface during the same period of time. [1]

  9. Platinum(II) sulfide - Wikipedia

    en.wikipedia.org/wiki/Platinum(II)_sulfide

    Platinum(II) sulfide is the inorganic compound with the formula Pt S. It is a green solid, insoluble in all solvents. It is a green solid, insoluble in all solvents. The compound adopts an unusual structure, being composed of square planar Pt and tetrahedral sulfide centers. [ 1 ]