alpha hemolysis

alpha hemolysis,

the development of a greenish zone around a bacterial colony growing on blood agar, characteristic of pneumococci and certain streptococci and caused by the partial decomposition of hemoglobin. Compare beta hemolysis.

alpha

the first letter of the Greek alphabet, A or α; used to denote the first position in a classification system; as, in names of chemical compounds, to distinguish the first in a series of isomers, or to indicate the position of substituent atoms or groups; also used to distinguish types of radioactive decay, brain waves or rhythms, adrenergic receptors, and secretory cells that stain with acid dyes, such as the alpha cells of the pancreas.

alpha-adrenergic antagonist

see alpha-blocking agents (below).

alpha-blocking agents

a group of drugs that selectively inhibit the activities of alpha receptors in the sympathetic nervous system. As with beta-blocking agents, alpha-adrenergic blocking agents compete with the catecholamines at peripheral autonomic receptor sites. This group includes ergot and its derivatives, and phenotolamine.

alpha brain waves

human brain-wave currents during electroencephalography having a frequency of approximately 8 to 13 hertz (pulsations per second), best seen when patient's eyes are closed and the patient is physically relaxed. See also electroencephalography.

alpha cells

glucagon-producing cells of the pancreas.

alpha-hemolysin

see alpha hemolysis.

alpha hemolysis

see alpha hemolysis.

alpha particles

a type of emission produced by the disintegration of a radioactive substance. The atoms of radioactive elements such as uranium and radium are very unstable; they are continuously breaking apart with explosive violence and emitting particulate and nonparticulate types of radiation. The alpha particles, consisting of two protons and two neutrons, have an electrical charge and form streams of tremendous energy when they are released from the disintegrating atoms. These streams of energy (alpha rays) are used to advantage in the treatment of various malignancies. See also radiation and radiotherapy.

alpha-responsive sympathomimetic drugs

drugs which cause vasoconstriction and maintain correct vascular permeability.

alpha-sheet

α-sheet a common structural feature of many proteins in which a single polypeptide chain turns regularly about itself to make a rigid cylinder in which each peptide bond is regularly hydrogen-bonded to other peptide bonds elsewhere in the chain.

alpha toxin

the toxins of many bacteria are classified as alpha, beta, etc.

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alpha alpha-adrenergic antagonist beta hemolysis Streptococcus viridans	alpha 1 -antitrypsin alpha 1 -antitrypsin test alpha 1 -proteinase inhibitor alpha 2 -antiplasmin alpha 2 -interferon alpha activity alpha alcoholism alpha angle alpha biofeedback Alpha blockers alpha carbon atom alpha carotene alpha cell alpha chain disease alpha effect alpha error Alpha Eta alpha fetoprotein Alpha fetoprotein screen alpha fiber alpha globulin alpha granule alpha heavy chain disease alpha helix alpha helix conformation alpha hemolysis Alpha Male alpha particle alpha ray alpha receptor alpha receptors alpha redistribution phase alpha rhythm alpha rigidity alpha state alpha subunit Alpha Tau Delta alpha wave alpha waves alpha- alpha-1 antitrypsin deficiency alpha-1-antiprotease Alpha-1-antitrypsin alpha-2 adrenergic receptor agonist Alpha-2 agonist alpha-2-macroglobulin alpha-adrenergic alpha-adrenergic agonist alpha-adrenergic antagonist alpha-adrenergic blockers alpha-adrenergic blocking agent	Alpha glucosidase inhibitor Alpha Glycerol Phosphate Dehydrogenase Alpha Gold Corporation alpha granule Alpha granules Alpha granules Alpha granules alpha gypsum Alpha heavy chain disease Alpha heavy chain disease Alpha heavy chain disease Alpha helical Alpha helical Alpha helical Alpha helice Alpha helice Alpha helice Alpha helices Alpha helices Alpha helices alpha helix alpha helix alpha helix alpha helix conformation Alpha helixes Alpha helixes Alpha helixes Alpha helixs Alpha helixs Alpha helixs alpha hemolysis Alpha Hemolytic Streptococcus Viridans Alpha High Density Lipoprotein Deficiency Disease Alpha Home Schoolers of McKinney Alpha Hospitality Corporation Alpha Hydrae Alpha hydroxy acid Alpha hydroxy acid Alpha hydroxy acid Alpha hydroxy acid Alpha Institute Alpha Iota Mu alpha iron alpha iron alpha irradiation Alpha Joint Interface Structure Alpha Joint Transfer Interface Converter Alpha Kappa Alpha Alpha Kappa Alpha Kappa Alpha Kappa Chi Alpha Kappa Delta Alpha Kappa Delta Phi Alpha Kappa Lambda Alpha Kappa Omicron Alpha Kappa Rho Alpha Kappa Zeta Alpha Ketoglutarate Alpha Lambda Delta Alpha Lambda Delta Phi Eta Sigma

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alpha
alpha-adrenergic antagonist
beta hemolysis
Streptococcus viridans

alpha 1 -antitrypsin

alpha 1 -antitrypsin test

alpha 1 -proteinase inhibitor