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  2. Tonicity - Wikipedia

    en.wikipedia.org/wiki/Tonicity

    Depiction of a red blood cell in an isotonic solution. A solution is isotonic when its effective osmole concentration is the same as that of another solution. In biology, the solutions on either side of a cell membrane are isotonic if the concentration of solutes outside the cell is equal to the concentration of solutes inside the cell.

  3. Isotonic regression - Wikipedia

    en.wikipedia.org/wiki/Isotonic_regression

    In statistics and numerical analysis, isotonic regression or monotonic regression is the technique of fitting a free-form line to a sequence of observations such that the fitted line is non-decreasing (or non-increasing) everywhere, and lies as close to the observations as possible.

  4. Completely randomized design - Wikipedia

    en.wikipedia.org/wiki/Completely_randomized_design

    For example, if there are 3 levels of the primary factor with each level to be run 2 times, then there are 6! (where ! denotes factorial) possible run sequences (or ways to order the experimental trials). Because of the replication, the number of unique orderings is 90 (since 90 = 6!/(2!*2!*2!)). An example of an unrandomized design would be to ...

  5. Biostatistics - Wikipedia

    en.wikipedia.org/wiki/Biostatistics

    It assumes some degree of association between the treatment and the outcome. Although, the hypothesis is sustained by question research and its expected and unexpected answers. [4] As an example, consider groups of similar animals (mice, for example) under two different diet systems. The research question would be: what is the best diet?

  6. Phosphate-buffered saline - Wikipedia

    en.wikipedia.org/wiki/Phosphate-buffered_saline

    There are many different ways to prepare PBS solutions, common ones are Dulbecco's phosphate-buffered saline (DPBS) [2] and the Cold Spring Harbor protocol. [3] Some formulations of DPBS do not contain potassium and magnesium, while other ones contain calcium and/or magnesium (depending on whether or not the buffer is used on live or fixed tissue: the latter does not require CaCl 2 or MgCl 2).

  7. Mathematical statistics - Wikipedia

    en.wikipedia.org/wiki/Mathematical_statistics

    Initial requirements of such a system of procedures for inference and induction are that the system should produce reasonable answers when applied to well-defined situations and that it should be general enough to be applied across a range of situations. Inferential statistics are used to test hypotheses and make estimations using sample data.

  8. Biological computation - Wikipedia

    en.wikipedia.org/wiki/Biological_computation

    The slime mould Physarum polycephalum is able to compute high-quality approximate solutions to the Traveling Salesman Problem, a combinatorial test with exponentially increasing complexity, in linear time. [15] Fungi such as basidiomycetes can also be used to build logical circuits.

  9. Biochemical systems equation - Wikipedia

    en.wikipedia.org/wiki/Biochemical_systems_equation

    For example, some authors use s, indicating species. [ 2 ] x is used here to match the state space notation used in control theory but either notation is acceptable. N {\displaystyle {\bf {N}}} is the stoichiometry matrix which is an m {\displaystyle m} by n {\displaystyle n} matrix of stoichiometry coefficient.

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