| Buchner funnel | A porcelain funnel that contains a perforated porcelain plate upon which filter paper can be laid. (05 Mar 2000) |
|---|---|
| Martegiani's funnel | The funnel-shaped dilation on the optic disk that indicates the beginning of the hyaloid canal. Synonym: Martegiani's area. (05 Mar 2000) |
| pial funnel | The pia-lined channel in which each blood vessel entering the brain lies suspended; essentially, the pial funnel's are perivascular extensions of the subarachnoid space. (05 Mar 2000) |
| funnel | 1. A vessel of the shape of an inverted hollow cone, terminating below in a pipe, and used for conveying liquids into a close vessel; a tunnel. 2. A passage or avenue for a fluid or flowing substance; specifically, a smoke flue or pipe; the iron chimney of a steamship or the like. <chemical> Funnel box, one of the ropes or rods steadying a steamer's funnel. Origin: OE. Funel, fonel, prob. Through OF. Fr, L. Fundibulum, infundibulum, funnel, fr. Infundere to pour in; in in + fundere to pour; cf. Armor. Founil funnel, W. Ffynel air hole, chimney. See Fuse. Source: Websters Dictionary (01 Mar 1998) |
| funnel breast | Caved-in chest. Usually an unimportant isolated finding evident at birth. (Funnel chest can occasionally be part of a connective tissue disorder such as Marfan syndrome). (12 Dec 1998) |
| funnel chest | A developmental anomaly in which the lower sternum is posteriorly dislocated and concavely deformed, resulting in a funnel-shaped thorax. (12 Dec 1998) |
| funnel-shaped pelvis | A pelvis in which the pelvic inlet dimensions are normal, but the outlet is contracted in the transverse or in both transverse and anteroposterior diameters. (05 Mar 2000) |
| 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) |
| 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) |