# factor

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Related to EDHF: Endothelin, EDRF

## factor,

in arithmetic, any number that divides a given number evenly, i.e., without any remainder. The factors of 12 are 1, 2, 3, 4, 6, and 12. Similarly in algebra, any one of the algebraic expressions multiplied by another to form a product is a factor of that product, e.g., a+b and ab are factors of a2b 2, since (a+b)(ab)=a2b2. In general, if r is a rootroot,
in mathematics, number or quantity r for which an equation f(r)=0 holds true, where f is some function. If f is a polynomial, r is called a root of f; for example, r=3 and r
of a polynomialpolynomial,
mathematical expression which is a finite sum, each term being a constant times a product of one or more variables raised to powers. With only one variable the general form of a polynomial is a0xn+a1x
equation f(x)=0, then (xr) is a factor of the polynomial f(x).

## factor

[′fak·tər]
(mathematics)
For an integer n, any integer which gives n when multiplied by another integer.
For a polynomial p, any polynomial which gives p when multiplied by another polynomial.
For a graph G, a spanning subgraph of G with at least one edge.
(statistics)
A quantity or a variable being studied in an experiment as a possible cause of variation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## factor

1. Maths
a. one of two or more integers or polynomials whose product is a given integer or polynomial
b. an integer or polynomial that can be exactly divided into another integer or polynomial
2. Med any of several substances that participate in the clotting of blood
3. Law, Commerce a person who acts on another's behalf, esp one who transacts business for another
4. former name for a gene
5. Commercial law a person to whom goods are consigned for sale and who is paid a factorage
6. (in Scotland) the manager of an estate
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## factor

A quantity which is multiplied by another quantity.

## factor

A number that divides evenly into another number. For example, 3 and 4 are factors of 12. See factorial and IFP.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
However, the contribution of the activation of the COX- and EDHF pathways by CGA in the improvement of agonist-induced relaxation cannot be excluded.
In conclusion, the present study demonstrated that CGA induces a direct endothelium-dependent vasorelaxation in rat aortic rings by increasing NOS, COX and EDHF signalling pathways.
EETs have four different regioisomers, 5,6-EET, 8,9-EET, 11,12-EET, and 14,15-EET, and have many biological functions; for example, they are released from endothelial cells and act as EDHFs to produce vasodilation through hyperpolarization [118, 119].
These results indicate the importance of [PGI.sub.2] and EDHF in the relaxation response of coronary arteries to E2 in all groups.
sinensis was found to stimulate nitric oxide production and EDHF to induce vasodilation effect and improve cardiovascular function.
Abbreviations EDHF: Endothelium-derived hyperpolarizing factor [H.sub.2][O.sub.2]: Hydrogen peroxide MnSOD: Manganese superoxide dismutase NO: Nitric oxide ROS: Reactive oxygen species.
The endothelium-derived relaxing factors (EDRFs), which are predominant in healthy blood vessels and promote vascular protection, include nitric oxide (NO, Furchgott and Zawadzki 1980), endothelium-derived hyperpolarizing factor (EDHF, Chen et al.
nitric oxide (NO), prostacyclin [I.sub.2] ([PGI.sub.2]) and endothelium-derived hyperpolarizing factor (EDHF) (Vanhoutte, 1998).
Vasorelaxant effects of EOAZ were totally abolished by mechanical removal of the endothelium, suggesting that they are dependent upon released endothelium-derived relaxant factors such as nitric oxide (NO), [PGI.sub.2] and/or endothelium-derived hyperpolarizing factor (EDHF).
These results suggest that the aqueous extract of MOO vasodilates via nitric oxide pathway with the possible involvement of prostacycline and endothelium-derived hyperpolarizing factor (EDHF) pathways as well.
Three different [K.sub.Ca] channel blockers including the specific antagonist of [Ca.sup.2+]-activated large conductance [K.sup.+] channels, iberiotoxin, or small conductance [K.sup.+] channels, apamin, and the non-selective [K.sup.+] channel inhibitor, TEA, were used in this study to test the hypothesis that the effect of aqueous hop extract on vasodilation changes was mediated by endothelium-derived hyperpolarizing factor (EDHF).
Keywords: Resistance artery; Vasodilation; Endothelium; Nitric oxide; EDHF; Hancornia speciosa

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