biological value

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1. a measure of worth or efficiency.
2. a quantitative measurement of the activity, concentration, or some other quality of something.
3. an operational belief; an ideal, custom, institution of a society toward which the members of the group have an affective regard; any object or quality desirable as a means or as an end in itself. In exchange theory, the benefits received through an exchange minus the price paid in return.
biological value the quality of a protein expressed on a scale of 1 to 100; the higher the number the better the quality.
cultural v's prevailing and persistent guides influencing the thinking and action of members of a cultural group. Values direct one's perceptions of others and serve as the basis for a person's opinions. Individuals belonging to groups with different cultural values may clash on health and illness behavior.
normal v's the range in concentration of specific substances found in normal healthy tissues, secretions, and so on.
P value (p value) the probability of obtaining by chance a result at least as extreme as that observed, even when the null hypothesis is true and no real difference exists; when P < 0.05 the sample results are usually deemed significant at a statistically important level and the null hypothesis rejected. See also Type I error.
reference v's a set of values of a quantity measured in the clinical laboratory that characterize a specified population in a defined state of health. The values obtained from a statistical sample are used to establish a reference interval that covers 95 per cent of the values of the healthy general population or of specific subpopulations differing in age and sex. These concepts were originally and are still widely referred to as “normal values” and the “normal range,” but the use of these terms is now discouraged because of their implication that values falling outside of the reference interval are “abnormal” or “unhealthy,” which has led to much confusion. It must be remembered that, by definition, 5 per cent of healthy individuals fall outside of the reference interval.

biological value

A measure of a food’s protein quality compared to that of egg protein, which has the maximum biological value of 0.9–1.00 (defined as the ratio of nitrogen retained/nitrogen lost in a single source). Cartilage has the lowest biological value of all food proteins.

biological value (of protein)

A measure of the efficiency of a consumed protein, esp. its nitrogen or amino acid content.


1. pertaining to biology.
2. a medicinal preparation made from living organisms and their products; these include serums, vaccines, etc.

biological clock
the physiological mechanisms which govern the rhythmic occurrence of certain biochemical, physiological and behavioral phenomena in living organisms. See also biological rhythm.
biological control
control of a parasite by making use of its natural enemies, especially other pests. The target may also be a vector or a reservoir for infection.
biological data
usually comprise a list of vital statistics about an animal or plant species, recording such things as preferred growth medium, temperature and humidity and details of the internal milieu including blood pH, normal blood electrolytes and the like.
biological environment
includes the influence of all biological factors such as warmth, moisture and humidity, but also the plant ecosystem in which the animal lives and the associated populations of vertebrates and invertebrates that may compete for food and space, and may also act as reservoirs for infectious diseases.
biological filters
are used for the treatment of sewage effluent. They comprise a column of stones or plastic pieces which become covered with bacteria which degrade the organic matter in the effluent.
biological significance
is an estimate of the biological importance of a statistical or apparent causal association between two variables, e.g. feed supply and the occurrence of bovine acetonemia. The estimation takes into account the possible biological relationship between the two; an estimate of statistical significance would take only the mathematical relationship into account.
biological value
relationship between the amount of nutrient absorbed and the amount utilized by the body. Expressed as a percentage. Called also BV.
References in periodicals archive ?
Food intake, weight gain, apparent protein, fat and energy digestibility, N biological value and N
The good quality protein present in giant grasshopper with high biological value as shown by high FER and PER values, together with ease of collection and breeding, and the economic aspects would make it a good quality protein source.
Class 2 caves have portions, that have hazardous conditions and contain sensitive geological, archeological, cultural, historical and biological values or high-quality ecosystem.
Tropical forests are treated as though they are a homogenous commodity and there is a lack of appreciation of the incredible range of forest types and of their special biological values.
These caves contain sensitive geological, archaeological, cultural, historical and biological values.
Biological values of mineral sources, abbreviations, and tables of composition and nutritional value are also covered.
This property was acquired to be protected for its unique and sensitive biological values, and to provide public recreational use," Harvey said.
Part of a wider project assessing biodiversity conservation needs around the world, this volume attempts to set conservation priorities for the 119 ecoregions of Africa and its Islands using data from multiple groups of plants and animals, incorporating nonspecies biological values, and including a quantitative assessment of threat.
I prefer to measure some things in dollars and some things in other kinds of values, like social values and biological values.
The gaps are those places with high biological values, but lacking adequate protections.
Some of the biological values amidst these pristine areas are the low-elevation old-growth forests in Washington's Wild Sky, the Sonoran desert and related upland ecosystems in Arizona's Tumacacoris, and sage grouse habitat on the uplands above Idaho's Owyhee Canyon Country.
Simply creating an island of old growth amid a clearcut landscape will not preserve biological values or habitat for endangered species," he says.

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