| streptothricin acetyltransferase | <enzyme> Confers resistance to streptothricin in gram-negative bacteria; site of acetylation not specified 4/85 Registry number: EC 2.3.1.- Synonym: acetyl CoA-streptothricin acetyltransferase (26 Jun 1999) |
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| streptothricins | <chemical> A group of antibiotic substances produced by streptomyces variants. They are composed of an aminosugar and different polypeptide chains and may have broad spectrum antimicrobial and some antiviral properties. Chemical name: Streptothricin (12 Dec 1998) |
| streptothrix | <biology> A genus of bacilli occurring of the form of long, smooth and apparently branched threads, either straight or twisted. Origin: NL, fr. Gr. Pliant, bent + a hair. Source: Websters Dictionary (01 Mar 1998) |
| streptotrichiasis | An infectious exudative dermatitis of cattle, sheep, goats, horses, and other animals (occasionally man) caused by Dermatophilus congolensis; severe (sometimes fatal) dermatophilosis is seen in cattle in the Caribbean, invariable in association with Amblyomma variegatum infestations. Synonym: proliferative dermatitis, streptothrichosis, streptotrichiasis, streptotrichosis. (05 Mar 2000) |
| streptotrichosis | An infectious exudative dermatitis of cattle, sheep, goats, horses, and other animals (occasionally man) caused by Dermatophilus congolensis; severe (sometimes fatal) dermatophilosis is seen in cattle in the Caribbean, invariable in association with Amblyomma variegatum infestations. Synonym: proliferative dermatitis, streptothrichosis, streptotrichiasis, streptotrichosis. (05 Mar 2000) |
| streptovaricin | <chemical> A complex of ansamycin antibiotics consisting of streptovaricins a, b, c, d, e, f, g, j, and k of which streptovaricin c is the major component. Pharmacological action: antibiotics, antibiotics, antineoplastic, antiviral agents. (12 Dec 1998) |
| streptovaricins | Antibiotics that block initiation of transcription in prokaryotes. ( Compare:. Rifamycins and rifampicin). (18 Nov 1997) |
| streptozocin | <chemical> An antibiotic that is produced by stretomyces achromogenes. It is used as an antineoplastic agent and to induce diabetes in experimental animals. Pharmacological action: antibiotics, aminoglycoside, antibiotics, antineoplastic. Chemical name: D-Glucose, 2-deoxy-2-(((methylnitrosoamino)carbonyl)amino)- (12 Dec 1998) |
| streptozotocin | Methyl nitroso urea with a 2 substituted glucose, used as an antibiotic (effective against growing gram-positive and gram-negative organisms) and also to induce a form of diabetes in experimental animals (rapidly induces pancreatic B-cell necrosis if given in high-dose). By using multiple low doses in a particular strain of mice, it is possible to produce insulitis followed later by diabetes, a model for juvenile onset diabetes in humans. (18 Nov 1997) |
| stress | 1. Forcibly exerted influence, pressure. In dentistry, the pressure of the upper teeth against the lower in mastication. 2. The sum of the biological reactions to any adverse stimulus, physical, mental or emotional, internal or external, that tends to disturb the organisms homeostasis, should these compensating reactions be inadequate or inappropriate, they may lead to disorders. The term is also used to refer to the stimuli that elicit the reactions. (18 Nov 1997) |
| stress breaker | A device that relieves the abutment teeth, to which a fixed or removable partial denture is attached, of all or part of the forces generated by occlusal function. (05 Mar 2000) |
| stress disorders, posttraumatic | Anxiety disorders manifested by the development of characteristic symptoms following a psychologically traumatic event that is outside the normal range of usual human experience. Symptoms include re-experiencing the traumatic event and numbing of responsiveness to or reduced involvement with the external world. (12 Dec 1998) |
| stress echocardiogram | <investigation> An echocardiogram that is performed after a period of physical exertion. Chemical stimulation of the heart (to mimic exertion) is used in some cases where physical activity is not possible. In some cases, exertion may manifest a cardiac abnormality not obvious during echocardiography in the resting heart. (27 Sep 1997) |
| stress echocardiography | Echocardiographic monitoring of a circulatory challenge, usually exercise. Transesophageal echocardiography, recording of the echocardiogram from a transducer swallowed by the patient to predetermined distances in the oesophagus and stomach. Transthoracic echocardiography, the standard echocardiography recorded from echocardiographic "windows" on the precordium. Two-dimensional echocardiography, echocardiography in which an image is reconstructed from the echoes stimulated and detected by a linear array or moving transducers. Synonym: B-mode echocardiography, cross-sectional echocardiography. (05 Mar 2000) |
| stress fibre | <physiology> Long bundles of microfilaments made up of actin subunits. They are involved in the attachment of cultured cells to a substratum, the determination of cell shape and may be involved in cellular mobility. They are found in most cells and have been shown to be contractile, have a periodicity reminiscent of the sarcomere and are anchored at one end to a focal adhesion, although sometimes between two focal adhesions. (17 Jul 2002) |
| stress fracture |
a fracture caused by unusual or repeated stress on a bone, such as with soldiers or athletes. Called also fatigue or march f. See Plate 18.
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| streptozocin |
(strep
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| strangalesthesia |
(stran
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| stress incontinence |
urinary i. due to anatomic displacement that exerts an opening pull on the bladder orifice, as in straining or coughing.
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| stromal endometriosis |
adenomyosis in which nearly all of the tissue infiltrating the myometrium consists of stroma.
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| STR | an expert in strategy (especially in warfare) |
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| STR | an elaborate and systematic plan of action |
| STR | the branch of military science dealing with military command and the planning and conduct of a war |
| STR | a town in central England on the River Avon |
| STR | a town in central England on the River Avon |
| STR | the placing of seeds in damp sand or sawdust or peat moss in ordere to preserve them or promote germination |
| STR | the act or process or arranging persons into classes or social strata |
| STR | a layered configuration |
| STR | forming or depositing in layers |
| STR | the condition of being arranged in social strata or classes within a group |
| STR | (geology) deposited or arranged in horizontal layers |
| STR | (used of society) "American society is becoming increasingly stratified" |