Exogenous

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exogenous

[‚ek′säj·ə·nəs]
(biology)
Due to an external cause; not arising within the organism.
Growing by addition to the outer surfaces.
(physiology)
Pertaining to those factors in the metabolism of nitrogenous substances obtained from food.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Exogenous

 

in botany, a term referring to the development of lateral organs in the peripheral cell layers of the main axis of a particular plant organ. Examples of exogenous organs are the leaves that develop in the form of external nodes on the growing point of shoots, root hairs (which are lateral growths of root integuments), and some epidermal growths (trichotomes) of a plant’s aboveground organs.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Net exports should remain an exogeneous variable in most models attempting to evaluate the impact of the trade deficit.
An inspection of the sign of the causal impact indicates a positive sum of the lagged coefficients of DX, suggesting that a change in [TABULAR DATA FOR TABLE IV OMITTED] [TABULAR DATA FOR TABLE V OMITTED] lagged export growth helps forecast current output growth.(22) Since the hypothesis of Granger non-causality from lagged DY to DX cannot be rejected at the conventional level of significance, we therefore conclude that the export growth variable is strongly exogeneous.
Exogeneous substances affecting development of in vitro-derived bovine embryos before and after embryonic genome activation.
if there is an exogeneous shock to [x.sup.*] or to its rate of growth, how does that affect the time path of e?
In contrast to these articles, the liabilities in the papers by Muller and Baumann (2008) and Baumann and Muller (2008) are not exogeneous. Baumann and Muller (2008) model the return attributed to the employees' accrued retirement benefits as a function of the funding ratio.
It would, for example, be interesting for future studies to look into the depth of encoding as well as to include a link with attention processing in a single study, for example, by administrating a free recall task after an exogeneous cueing paradigm, which in its turn distinguishes between guiding attention toward or away from certain cues (Posner 1980).
Piccolo, "Remediation of highly contaminated soils from an industrial site by employing a combined treatment with exogeneous humic substances and oxidative biomimetic catalysis," Journal of Hazardous Materials, vol.
Murray, "Exogeneous re-infection and the dynamics of tuberculosis epidemics: local effects in a network model transmission," Journal of the Royal Society Interface, vol.
The process of IVF involves using exogeneous hormones to achieve cycle control and stimulate the ovary and luteal support.
Random conductance model assumes [{[c.sub.j]}.sub.j[member of]Z] to be a realization of an exogeneous positive stationary ergodic random variables {[C.sub.j][}.sub.j[member of]Z].
In the group of patients treated with sirolimus monotherapy, the authors observed an increase in fasting C-peptide levels and a significant decrease in exogeneous insulin requirement compared to patients not receiving sirolimus.