Množina: dopas

A phenolic amino acid C9H11NO4 occurring naturally (as in broad beans) or prepared synthetically (as from tyrosine) — compare L-DOPA.

Množina: dopamines

Neurotransmitter, hydroxytyramine C8H11NO2, an intermediate in the formation of adrenaline. There are special nerve cells (neurons) in the brain that use dopamine for the transmission of nervous impulses. One such area of dopamine neurons lies in the basal ganglia, a region that controls movement. Patients suffering from the tremors of Parkinson’s disease show nerve degeneration in this region. Another dopamine area lies in the limbic system, a region closely involved with emotional responses. It has been found that schizophrenic patients respond well to drugs that limit dopamine excess in this area.A monoamine neurotransmitter found in the brain; as a drug (trade names Dopastat and Intropin) it is used to treat shock and hypotension; SYN. Dopastat, Intropin.

Množina: dopamine receptors

Liberating, activated by, or involving dopamine or related substances

Množina: dopants

An impurity that is added in small quantities to semiconductor material during the manufacture of diodes, transistors, and integrated circuits. The resistance of a semiconductor falls between the resistance of a conductor and the resistance of an insulator (hence its name); dopants are added to the semiconductor to increase its conductivity. The type and amount of dopant determine whether the semiconductor will be N-type (in which current is conducted by free electrons) or P-type (in which current is conducted by electron vacancies, called holes). Common dopants include arsenic, antimony, bismuth, and phosphorus. See also N-type semiconductor, P-type semiconductor.

Množina: dopaoxidases