| ultrasonography, prenatal | The visualization of tissues during pregnancy through recording of the echoes of ultrasonic waves directed into the body. The procedure may be applied with reference to the mother or the foetus and with reference to organs or the detection of maternal or foetal disease. (12 Dec 1998) |
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| ultrasonosurgery | Use of ultrasound techniques to disrupt cells, tissues, or tracts, particularly in the central nervous system. (05 Mar 2000) |
| ultrasound | <investigation> A type of imaging technique which uses high-frequency sound waves. This is highly operator-dependent and is thought to be useful in diagnosis but not particularly accurate in the assessment of tumour response. For the latter, CT or MR imaging are more accurate. (16 Dec 1997) |
| ultrasound cardiography | Echocardiography is a diagnostic test which uses ultrasound waves to make images of the heart chambers, valves and surrounding structures. It can measure cardiac output and is a sensitive test for inflammation around the heart (pericarditis). It can also be used to detect abnormal anatomy or infections of the heart valves. (12 Dec 1998) |
| ultrasound examination | <investigation> The use of high-frequency sound waves to locate a tumour inside the body. Helps determine if a breast lump is solid tissue or filled with fluids. (09 Oct 1997) |
| ultrasound guided biopsy | <procedure> The use of ultrasound to guide a biopsy needle to obtain a sample of tissue for analysis by a pathologist. (09 Oct 1997) |
| ultrasound imaging | <investigation, procedure> A technique in which high-frequency sound waves are bounced off internal organs and the echo pattern is converted into a 2 dimensional picture of the structures beneath the transducer. (12 May 1997) |
| ultrasound of the breast | <investigation> A test which uses ultrasonic waves to scan the breast. Used to evaluate fibrocystic breast disease, breast implants or breast masses. (27 Sep 1997) |
| ultrasound/ultrasonography | A test in which high-frequency sound waves (ultrasound) are bounced off tissues and the echoes are converted into a picture (sonogram). (12 Dec 1998) |
| ultrastructural anatomy | The ultramicroscopic study of structures too small to be seen with a light microscope. (05 Mar 2000) |
| ultrastructure | <pathology> General term to describe the level of organisation that is below the level of resolution of the light microscope. In practice, a shorthand term for structure observed using the electron microscope, although other techniques could give information about structure in the sub micrometre range. (18 Nov 1997) |
| ultratherm | A short-wave diathermy machine. Origin: ultra-+ G. Therme, heat (05 Mar 2000) |
| ultraviolet | <physics> Continuous spectrum beyond the violet end of the visible spectrum (wavelength less than 400nm) and above the X-ray wavelengths (greater than 5 nm). Glass absorbs UV, so optical systems at these wavelengths have to be of quartz. Nucleic acids absorb UV most strongly at around 260nm and this is the wavelength most likely to cause mutational damage (by the formation of thymine dimers). It is the UV component of sunlight that causes actinic keratoses to form in skin, but that is also required for Vitamin D synthesis. (18 Nov 1997) |
| ultraviolet A | Ultraviolet radiation from 320 to 400 nm that causes skin tanning but is very weakly sunburn-producing and carcinogenic. (05 Mar 2000) |
| ultraviolet B | Ultraviolet radiation from 290 to 320 nm that most effectively causes sunburning and tanning; excessive UVB exposure is a cause of cancer of fair skin. (05 Mar 2000) |
Synonyms : Therapy, Ultraviolet, Actinotherapies, Therapies, Ultraviolet, Ultraviolet Therapies
| ultra- |
Ultra is a comic book mini-series written by the Luna brothers; Jonathan (art and plot) and Joshua (script). The series was published by Image Comics and was released in eight issues in 2004 and 2005. The series' central character is Pearl Penalosa, who is also a superheroine called Ultra. The story deals only peripherally with traditional superhero comics themes like fighting supervillains and concentrates mainly on how being a superhero affects Pearl's personal life. ...
출처: en.wikipedia.org/wiki/Ultra_(comics)
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| ultra- |
Founded in 1988 as a subsidiary of Konami of America, Ultra Software Corporation was a spinoff company created in an effort to get around Nintendo of America's strict licensing rules. One of these rules was that a third-party company could only publish up to five games per year for the (NES) in the US. This was hardly convenient for Konami, which has begun releasing more than ten games a year for both, the Famicom and Famicom Disk System, in Japan. ...
출처: en.wikipedia.org/wiki/Ultra_(company)
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| ultrafiltration |
Ultrafiltration is a filtration process in chemistry that can retain solutes with relative molecular masses in the order of 100s to 1000s.It is also used in haemodialysis to clean whole blood while keeping its composition intact. In biological terms this occurs at the barrier between the blood and the filtrate in the renal corpuscle or Bowman's capsule in the kidneys. The Bowman's capsule contains a dense capillary network called the glomerus. ...
출처: en.wikipedia.org/wiki/Ultrafiltration
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| ultramicroscope |
The ultramicroscope is a system of illumination for extremely small objects such as colloidal particles, fog droplets, or smoke particles. The objects are held in liquid or gaseous suspension in an enclosure with an intensely black background (usually a black body) and illuminated with a convergent pencil of very bright light entering from one side and coming to focus in the field of view - the "Tyndall cone" familiar in experiements on scattering. ...
출처: en.wikipedia.org/wiki/Ultramicroscope
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| ultramicrotome |
A microtome is a mechanical instrument used to cut very thin slices for microscopic examination. Most microtomes use a steel blade and are used to prepare sections of animal, plant or human tissues for histology. The most common applications of microtomes are: * Traditional histological technique: tissues are hardened by replacing water with paraffin. Sections are stained and examined with a visible light microscope. Sections are 2 to 10 micrometres thick. ...
출처: en.wikipedia.org/wiki/Ultramicrotome
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