| scanning transmission electron microscopy | <procedure> Method of electron microscopy in which image formation depends upon analysis of the pattern of energies of electrons that pass through the specimen. Has comparable resolving power to conventional transmission EM. (18 Nov 1997) |
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| scanning tunnelling microscopy | <procedure> A form of ultra high resolution microscopy of a surface in which a very small current is passed through a surface and is detected by a microprobe of atomic dimnensions at its tip that scans the surface by use of a piezodrive. In the simplest form the current transferred to the probe is recorded as an indication of the contours of molecules on the surface above the local plane. In more complex forms feedback is used to hold the probe at a constant difference and the signal in the feedback loop indicates the contours of the molecule. Capable of resolving single atoms and known to work for nonconducting molecules as well as conducting ones. (18 Nov 1997) |
| Environmental Scanning Electron Microscopy | <technique> Scanning electron microscopy is performed by scanning a focused probe across the surface of the sample to be studied. In the environmental scanning electron microscopy the composition and pressure of the atmosphere around the specimen may be controlled. In favourable cases non-conductive specimens may be examined without coating, and hydrated specimens may be examined with the water still in place. Acronym: ESEM (05 Aug 1998) |
| linker scanning | A type of deletion mutagenesis where the distance and/or reading frame between potentially important regions is maintained by replacement with a synthetic oligonucleotide of known sequence. (05 Mar 2000) |
| biopsy, salivary gland | <investigation, procedure, surgery> A procedure which involves the removal of a small specimen of salivary gland tissue for microscopic analysis. Used in the diagnosis of Sjogren's syndrome. Risks include localised bleeding, infection and injury to the facial nerve. (21 Mar 1998) |
| major salivary glands | A category of salivary gland's that includes the three largest gland's of the oral cavity that also secrete most of the saliva: the parotid, submandibular, and sublingual gland's. (05 Mar 2000) |
| minor salivary gland | A small gland which produces saliva. There are numerous minor salivary glands distributed within the mouth and palate. (12 Dec 1998) |
| minor salivary glands | The smaller, largely mucous-secreting, exocrine gland's of the oral cavity, consisting of the labial, buccal, molar, lingual, and palatine gland's. (05 Mar 2000) |
| mixed tumour of salivary gland | A tumour composed of salivary gland epithelium and fibrous tissue with mucoid or cartilaginous areas. Synonym: pleomorphic adenoma. (05 Mar 2000) |
| premenstrual salivary syndrome | <syndrome> Glandular abnormalities occurring prior to the onset of menses, including swelling of the breast tissues and enlargement of the salivary glands. (05 Mar 2000) |
| salivary | <physiology> Of or pertaining to saliva; producing or carrying saliva; as, the salivary ferment; the salivary glands; the salivary ducts, etc. Origin: L. Salivarius slimy, clammy: cf. F. Salivaire. Source: Websters Dictionary (01 Mar 1998) |
| salivary calculus | A calculus in a salivary duct or gland. Synonym: supragingival calculus. (05 Mar 2000) |
| salivary colic | Periodic attacks of pain in the region of a salivary duct or gland, accompanied by an acute swelling of the gland, occurring in cases of salivary calculus. (05 Mar 2000) |
| salivary corpuscle | One of the leukocytes present in saliva. (05 Mar 2000) |
| salivary digestion | The conversion of starch into sugar by the action of salivary amylase. (05 Mar 2000) |