Suppression

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suppression

[sə′presh·ən]
(computer science)
Removal or deletion usually of insignificant digits in a number, especially zero suppression.
Optional function in either on-line or off-line printing devices that permits them to ignore certain characters or groups of characters which may be transmitted through them.
(electronics)
Elimination of any component of an emission, as a particular frequency or group of frequencies in an audio-frequency of a radio-frequency signal.
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 It might be outdated or ideologically biased.

Suppression

 

in genetics, a phenomenon that prevents the appearance of a character resulting from mutation and that causes partial or complete restoration of the normal phenotype.

Intragenic suppression is caused by a second (suppressor) mutation in the same gene in which the first (direct) mutation occurred. Intergenic suppression is caused by a second mutation in other genes that are located at a considerable distance from the suppressed gene. In intragenic suppression, a protein coded by a given gene can reacquire functional activity, although its original structure, in contrast to true reverse mutation, or reversion, is not restored. In intergenic suppression, the normal phenotype may be restored in some cases owing to mutations that permit other means of metabolism which do not require the functioning of the given gene. In other cases, the normal phenotype may be restored as a result of mutations that alter the process by which the genetic information of the mutant gene is realized.

The phenomenon of suppression, first discovered in 1920 by the American geneticist A. H. Sturtevant, is used to study the genetic code and other aspects of molecular genetics.

REFERENCE

Stent, G. Molekuliarnaia genetika. Moscow, 1974. Chapter 6. (Translated from English.)

I. I. TOLSTORUKOV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Once leptin resistance occurs, appetite suppression and control of energy expenditure are lost and starvation physiology defaults to conditions that actually promote continued weight gain (see Figure 6).
None of these substances, which include alcohol, caffeine, dextrose, and guar gum, have proved effective in weight-loss or appetite suppression.
Phyllis Jensen writes in Quitting Smoking is a Subversive Activity, (Healthsaring, Spring 1984), that nicotine alters the blood sugar to create a sensation of appetite suppression, and stimulates the heart rate to produce a lift.
Although not specifically indicated as a monotherapy for weight loss, switching to or augmenting therapy with bupropion could aid weight loss through appetite suppression. (20) Some newer antidepressants, such as vilazodone, vortioxetine, and levomilnacipran, might have less propensity to cause weight gain.
There are at least three current theories to explain appetite suppression associated with HCA.
He said studies showed that alcohol increases your appetite by suppressing leptin, the hormone which normally tells your brain to stop eating, but it also negatively effects many other brain chemicals that are involved in appetite suppression.
The newly created upper pouch allows the patient to eat only small amounts of food at a time, and it provides prolonged appetite suppression.
(Leptin is associated with appetite suppression; high levels, typically found in people with obesity, are believed to be a sign of leptin insensitivity.) The low-fat diet, which has long been recommended conventionally, produced the lowest measures of insulin sensitivity and highest triglyceride levels--both of which are linked to metabolic syndrome.
Emispherea[euro](tm)s proprietary oral SNAC (Sodium N-[8-(2-hydroxybenzoyl) Amino] Caprylate) additive, in combination with the digestive hormones GLP-1 and PYY3-36, was successful in reducing food intake and increasing satiety in healthy male subjects in the appetite suppression study.
In contrast, studies with low-dose combinations of naloxone and CB1 receptor antagonist/inverse agonists have very recently confirmed the potential of drug polytherapies not only in appetite suppression but also in attenuating/eliminating unwanted side-effects.
Slimaluma[R]: Appetite Suppression & Fat Reduction
In fact, it often has the opposite effect, triggering appetite suppression and weight loss that may be a benefit in overweight pediatric patients.