Life Sciences Glossary: From Deep Sea Mining to Diabetes Insipid Us

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Deep Sea Mining

Techniques used for mineral exploration like manganese nodules from sea-beds by a specially equipped ship.

Deliquescence

Is the property of a substance of absorbing moisture from the air on exposure?

Decorative Laminates

Decorative laminates like sumac, Formica, etc. are polymers of malerrine and formaldehyde. Such materials are also called resins.

Docking

The joining together of two separate units in space although the two are not launched at the same time.

Dog Star

The name of star Sirius, which is closer to the Earth and the brightest of all the stars.

Dominance

The phenotypic expression of the individual effects of two different alleles in a heterozygote.

Daltons

After John Dalton, a form of red- green colour- blindness.

Decalcification

The loss of calcium salts from the teeth and bones.

Decarboxylation

A chemical process in which a compound loses a molecule of carbon dioxide.

Decibel

After Alexander G. Bell, a unit of measure of the intensity of sound.

Decomposer

An organism that uses dead organic matter as a source of energy.

Decompression Sickness

A painful, sometimes fatal, condition caused by the formation of nitrogen bubbles in the tissues of divers.

Defecations

The discharge of excreta (faces) from the rectum.

Definitive Host

Any animal in which the reproductive stages of a parasite develop.

Degeneracy

Set of a genetic code in which a particular amino acid is coded by more than one codon.

Degeneration

The gradual deterioration of normal cells and its functions.

Deglutition

The act of swallowing.

Degradation

The reduction of a complex chemical compound into a simple compound.

Dehydration

A condition due to excessive water loss from the body or its parts.

Deletion

An aberration in which a section of DNA or chromosome has been lost.

Deme

A local interbreeding population.

Dementia

A progressive mental disorder characterized by chronic personality disintegration, confusion, disorientation, deterioration of intellectual capacity and memory, usually occurs in old age.

Demography

The properties of the rate of growth and the age structure of populations.

Denature

To alter the structure of a protein so that some of its original properties are diminished.

Dendrite

A branching process that extends from the cell body of a neuron.

Dengue Fever

An acute parvovirus infection transmitted to humans by the Aides mosquito the patient experiences fever, extreme weakness, headache, sore, throat, muscle pains and enema of the hands and feet.

Dentition

The arrangement of teeth in a vertebrate.

Dermal

Pertaining to the skin cutaneous.

Dermatitis

An inflammatory condition of the skin.

Desmosome

A region of contact between epithelial cells at which keratin filaments are anchored to the plasma membrane.

Detoxification

The removal of a poison or its effects.

Detritus

Any fine particulate debris of organic or inorganic origin.

Deuterostomes

Coelomate phyla in which the embryonic blastopore becomes the anus.

Device

A mechanical item other than a drug that has application in the healing arts. Devices include artificial heart valves, pacemakers and prostheses.

Diabetes

A clinical condition cauterized save excretion of sugar in urine.

Diabetes Insipid Us

A metabolic disorder characterized by excretion of large amount of urine caused by deficient production of the antidiuretic hormone (ADH) .

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