| bioprocess | The process of preparing a biological product (especially one involving genetic engineering) for commercial use. (09 Oct 1997) |
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| bioprosthesis | Prosthesis, usually heart valve, composed of biological material and whose durability depends upon the stability of the material after pretreatment, rather than regeneration by host cell ingrowth. Durability is achieved 1) mechanically by the interposition of a cloth, usually polytetrafluoroethylene, between the host and the graft, and 2) chemically by stabilization of the tissue by intermolecular linking, usually with glutaraldehyde, after removal of antigenic components, or the use of reconstituted and restructured biopolymers. (12 Dec 1998) |
| biopsy | <investigation, procedure, surgery> A biopsy refers to a procedure that involves obtaining a tissue specimen for microscopic analysis to establish a precise diagnosis. Biopsies can be accomplished with a biopsy needle (passed through the skin into the organ in question) or by open surgical incision. See: abdominal wall fat pad biopsy, endometrial biopsy, heart biopsy, muscle biopsy, needle biopsy, nerve biopsy, open lung biopsy, pleural needle biopsy, salivary gland biopsy. (07 Apr 1998) |
| biopsy needle | <equipment> A skinny needle that is passed percutaneously into an organ being investigated (liver and kidney are common). Tissue is obtained from the core of the needle and then analysed under the microscope. (21 Mar 1998) |
| biopsy, endometrial | <investigation, procedure, surgery> A procedure by which a sample is taken of the endometrial lining of the uterus. This may be performed with or without an anaesthetic. Risks include bleeding after the procedure. This test is usually performed in the evaluation of abnormal menses, heavy menstruation or post-menopausal bleeding. It may be part of an infertility evaluation. Endometrial biopsy can reveal uterine cancer, uterine fibroids, uterine polyps and adenomyosis. Often performed in those with endometriosis as part of the evaluation. (21 Mar 1998) |
| biopsy, heart | <investigation, procedure, surgery> A procedure which involves the removal of a small specimen of cardiac muscle tissue for microscopic analysis. This is generally performed at the same time as a cardiac catheterisation or as a very similar, yet separate, procedure. A small piece of heart tissue is taken via a small forceps inserted into the cardiac catheter site (usually threaded through a vein in the neck). This test may reveal the cause of a cardiomyopathy, myocarditis, amyloidosis or a heart transplant rejection. (21 Mar 1998) |
| biopsy, muscle | <investigation, procedure, surgery> A procedure which involves the removal of a small specimen of muscle tissue for microscopic analysis. A muscle biopsy is used to distinguish between neurological and myopathic (muscle disease) disorders, identify muscular dystrophy, diagnose muscle infections and identify connective tissue disorders (necrotising vasculitis). (21 Mar 1998) |
| biopsy, myocardial | <investigation, procedure, surgery> A procedure which involves the removal of a small specimen of cardiac muscle tissue for microscopic analysis. This is generally performed at the same time as a cardiac catheterisation or as a very similar, yet separate, procedure. A small piece of heart tissue is taken via a small forceps inserted into the cardiac catheter site (usually threaded through a vein in the neck). This test may reveal the cause of a cardiomyopathy, myocarditis, amyloidosis or a heart transplant rejection. (21 Mar 1998) |
| biopsy, nerve | <investigation, procedure, surgery> A procedure which involves the removal of a small specimen of nerve tissue for microscopic analysis. The ankle or wrist are the most common sites used for nerve biopsy. Conditions such as amyloidosis, sarcoidosis, metabolic polyneuropathy, leprosy, demyelination, alcoholic neuropathy, Charcot-Marie-tooth disease, peroneal nerve dysfunction, mononeuritis multiplex and other polyneuropathies may be detected using this study. (21 Mar 1998) |
| biopsy, open lung | <investigation, procedure, surgery> A procedure which involves the removal of a small specimen of lung tissue for microscopic analysis via a surgical incision in the chest wall. This test can be used to identify a variety of lung cancers, lung infections and lung diseases. (21 Mar 1998) |
| biopsy, pleural needle | <investigation, procedure, surgery> A pleural needle biopsy involves the use of a needle (inserted from the skin) to obtain a small sample of pleural tissue for microscopic analysis. The biopsy is done using a local anaesthetic. Abnormal results may reveal cancer (metastatic or primary), tuberculosis, a fungal disease, viral disease, a parasitic disease or collagen vascular disease. Risks include pneumothorax and internal bleeding. (21 Mar 1998) |
| 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) |
| biopsychology | An interdisciplinary area of study involving psychology, biology, physiology, biochemistry, the neural sciences, and related fields. (05 Mar 2000) |
| biopsychosocial | Involving interplay of biological, psychological and social influences. (05 Mar 2000) |
| biopsychosocial model | A conceptual model that assumes that psychological and social factors must also be included along with the biological in understanding a person's medical illness or disorder. (05 Mar 2000) |
| bioremediation |
Use of biological organisms to remove or detoxify pollutants from a contaminated area.
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| biocide |
A broad-spectrum poison that kills a wide range of organisms.
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| biosphere |
The zone of air, land, and water at the surface of the earth that is occupied by organisms.
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| biota |
All organisms in a given area.
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| biosphere |
That transition zone between earth and atmosphere within which most forms of terrestrial life are commonly found; the outer portion of the geosphere and inner or lower portion of the atmosphere.
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