| Fp | frontal polar electrode placement in electroencephalography |
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| MCPPP | metacarpophalangeal pattern profile plot |
| PB | polar body |
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| Arrhenius plot | A plot of the logarithm of reaction rate against the reciprocal of absolute temperature. For a single stage reaction this gives a straight line from which the activation energy and the frequency factor can be determined. Often applied to data from complex biological systems when the form observed is frequently a series of linear portions with sudden changes of slope. Great caution must be observed in interpreting such slopes in terms of activation energies for single processes. (18 Nov 1997) |
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| Ramachandran plot | A graphical representation in which the dihedral angle of rotation about the alpha-carbon to carbonyl-carbon bond in polypeptides is plotted against the dihedral angle of rotation about the alpha-carbon to nitrogen bond. Synonym: conformational map. (05 Mar 2000) |
| Woolf-Lineweaver-Burk plot | <statistics> A graph made to analyse how fast an enzyme can convert its substrate into its product, depending on how much substrate is present (its concentration) and to determine its maximum speed (after which the enzyme does not get any faster no matter how high the concentration of substrate gets), called Vmax. It is a plot of 1/v versus 1/[S], where v=rate of product formation and [S]=the concentration of the substrate. Synonym: Lineweaver-Burk plot, Woolf-Lineweaver-Burk plot. (05 Mar 2000) |
| plot | 1. A small extent of ground; a plat; as, a garden plot. 2. A plantation laid out. 3. A plan or draught of a field, farm, estate, etc, drawn to a scale. Origin: AS. Plot; cf. Goth. Plats a patch. Cf. Plat a piece of ground. 1. Any scheme, stratagem, secret design, or plan, of a complicated nature, adapted to the accomplishment of some purpose, usually a treacherous and mischievous one; a conspiracy; an intrigue; as, the Rye-house Plot. "I have overheard a plot of death." (Shak) "O, think what anxious moments pass between The birth of plots and their last fatal periods!" (Addison) 2. A share in such a plot or scheme; a participation in any stratagem or conspiracy. "And when Christ saith. Who marries the divorced commits adultery, it is to be understood, if he had any plot in the divorce." (Milton) 3. Contrivance; deep reach thought; ability to plot or intrigue. "A man of much plot." 4. A plan; a purpose. "No other plot in their religion but serve Got and save their souls." 5. In fiction, the story of a play, novel, romance, or poem, comprising a complication of incidents which are gradually unfolded, sometimes by unexpected means. "If the plot or intrigue must be natural, and such as springs from the subject, then the winding up of the plot must be a probable consequence of all that went before." (Pope) Synonym: Intrigue, stratagem, conspiracy, cabal, combination, contrivance. Origin: Abbrev. From complot. Source: Websters Dictionary (01 Mar 1998) |
| control plot | A plot in which no vegetation will be cut and natural succession will occur. A control plot serves as a baseline to compare other treatments (Early, Mid and Late Seral). (05 Dec 1998) |
| Hanes plot | A graphical representation of enzyme kinetic data in which the substrate concentration divided by the velocity (i.e., the [S]/v ratio) is plotted on the vertical axis as a function of [S]. Sometimes referred to as the Hanes-Wilkinson plot. (05 Mar 2000) |
| Scatchard plot | A method for analysing data for freely reversible ligand/receptor binding interactions. The graphical plot is: Bound ligand/Free ligand) against (Bound ligand), the slope gives the negative reciprocal of the binding affinity, the intercept on the x axis the number of receptors (Bound/Free becomes zero at infinite ligand concentration). The Scatchard plot is preferable to the Eadie Hoffstee plot for binding data because it is more dependent upon the values at high ligand concentration which will be the most reliable values. A nonlinear Scatchard plot is often taken to indicate heterogeneity of receptors, although this is not the only explanation possible. (18 Nov 1997) |
| hill plot | A method which is used to find out how many binding sites of a particular type are present on a given protein molecule. The Hill plot does this by graphical representation of the molecule. (09 Oct 1997) |
| hydropathy plot | <chemistry, investigation> A graph which shows how hydrophobic each amino acid in a polypeptide is versus where it is located on the polypeptide. The hydropathy plot is used to find clusters of hydrophobic amino acids, which could indicate that the polypeptide in question is a transmembrane protein. A transmembrane protein has hydrophilic parts which protrude out on either side of the cellular membrane, and a hydrophobic centre which lies within the membrane. (09 Oct 1997) |
| double-reciprocal plot | <statistics> A graph made to analyse how fast an enzyme can convert its substrate into its product, depending on how much substrate is present (its concentration) and to determine its maximum speed (after which the enzyme does not get any faster no matter how high the concentration of substrate gets), called Vmax. It is a plot of 1/v versus 1/[S], where v=rate of product formation and [S]=the concentration of the substrate. Synonym: Lineweaver-Burk plot, Woolf-Lineweaver-Burk plot. (05 Mar 2000) |
| Eadie-Hofstee plot | <biochemistry> A graphical representation of enzyme kinetic data in which the velocity of the reaction is plotted on the vertical axis as a function of the v/S ratio on the horizontal axis, with S being the initial substrate concentration. The intercept on the ordiate is Vmax, the slope is Km. Preferable to the Lineweaver Burke plot. Synonym: Eadie-Augustinsson plot, Woolf-Eadie-Augustinsson-Hofstee plot. (05 Jul 2000) |
| Lineweaver Burke plot | A plot of 1/v against 1/S for an enzyme catalysed reaction, where v is the initial rate and s the substrate concentration. From the equation: 1/v = 1/Vmax(1+Km/S) the parameters Vmax and Km can be determined. The equation overweights the contribution of the least accurate points and other methods of analysis are preferred. See: Eadie Hofstee plot. (18 Nov 1997) |
| Lineweaver-Burk plot | <statistics> A graph made to analyse how fast an enzyme can convert its substrate into its product, depending on how much substrate is present (its concentration) and to determine its maximum speed (after which the enzyme does not get any faster no matter how high the concentration of substrate gets), called Vmax. It is a plot of 1/v versus 1/[S], where v=rate of product formation and [S]=the concentration of the substrate. Synonym: Lineweaver-Burk plot, Woolf-Lineweaver-Burk plot. (05 Mar 2000) |
| polar | Describes a feature or phenomenon occuring at the end (pole) of an object (such as a planet) or organism (such as an amoeba). <chemistry> Describes a molecular that has a permanent electric dipole. See: polar group. Compare: nonpolar, nonpolar groups. (12 Mar 1998) |
| polar amino acid | An alpha-amino acid in which the functional group attached to the alpha-carbon (i.e., R in RCH(NH2)COOH) has hydrophilic properties; e.g., serine, cysteine, homocysteine. (05 Mar 2000) |
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