| polarise | To put into a state of polarization. (05 Mar 2000) |
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| polarised light | Light in which, as a result of reflection or transmission through certain media, the vibrations are all in one plane, transverse to the ray, instead of in all planes. (05 Mar 2000) |
| polariser | The first element of a polariscope that polarises the light, as distinguished from the analyzer, the second polarising element. (05 Mar 2000) |
| polarising microscope | <instrument> A microscope equipped with a polarising filter below and above the specimen which forms an image by the influence of specimen birefringence on polarised light; the polarising direction of the two filters is typically adjustable which, together with a graduated rotating stage, permits measurement of the angular value of different refractive indices in either biological or chemical specimens. (05 Mar 2000) |
| polaristic | Pertaining to, or exhibiting, poles; having a polar arrangement or disposition; arising from, or dependent upon, the possession of poles or polar characteristics; as, polariztic antagonism. Source: Websters Dictionary (01 Mar 1998) |
| polarity | <physics> Literally having poles (like a magnet), but used to describe cells that have one or more axes of symmetry. <cell biology> In epithelial cells, the polarity meant is between apical and baso lateral regions, in moving cells, having a distinct front and rear. Some cells seem to show multiple axes of polarity (which will hinder forward movement). (18 Nov 1997) |
| polarity of translation | Decrease in the synthesis of proteins specified by genes distal to the operator and to the site of a nonsense, frameshift, deletion or insertion mutation in an operon. A mutation which produces polarity is called a polar mutation or a polarity mutation. (12 Dec 1998) |
| polarizability | <chemistry> Of orbitals means that the electron cloud can be shifted towards a positive charge or away from a negative charge due to electrostatic attraction and repulsion. (09 Jan 1998) |
| polarizable | Susceptible of polarization. Source: Websters Dictionary (01 Mar 1998) |
| polarization | 1. The act of polarizing; the state of being polarized, or of having polarity. 2. <optics> A peculiar affection or condition of the rays of light or heat, in consequence of which they exhibit different properties in different directions. If a beam of light, which has been reflected from a plate of unsilvered glass at an angle of about 56 deg, be received upon a second plate of glass similar to the former, and at the same angle of incidence, the light will be readily reflected when the two planes of incidence are parallel to each other, but will not be reflected when the two planes of incidence are perpendicular to each other. The light has, therefore, acquired new properties by reflection from the first plate of glass, and is called polarized light, while the modification which the light has experienced by this reflection is called polarization. The plane in which the beam of light is reflected from the first mirror is called the plane of polarization. The angle of polarization is the angle at which a beam of light must be reflected, in order that the polarization may be the most complete. The term polarization was derived from the theory of emission, and it was conceived that each luminous molecule has two poles analogous to the poles of a magnet; but this view is not now held. According to the undulatory theory, ordinary light is produced by vibrations transverse or perpendicular to the direction of the ray, and distributed as to show no distinction as to any particular direction. But when, by any means, these, vibrations are made to take place in one plane, the light is said to be plane polarized. If only a portion of the vibrations lie in one plane the ray is said to be partially polarized. Light may be polarized by several methods other than by reflection, as by refraction through most crystalline media, or by being transmitted obliquely through several plates of glass with parallel faces. If a beam of polarized light be transmitted through a crystal of quartz in the direction of its axis, the plane of polarization will be changed by an angle proportional to the thickness of the crystal. This phenomenon is called rotatory polarization. A beam of light reflected from a metallic surface, or from glass surfaces under certain peculiar conditions, acquires properties still more complex, its vibrations being no longer rectilinear, but circular, or elliptical. This phenomenon is called circular or elliptical polarization. 3. <physics> An effect produced upon the plates of a voltaic battery, or the electrodes in an electrolytic cell, by the deposition upon them of the gases liberated by the action of the current. It is chiefly due to the hydrogen, and results in an increase of the resistance, and the setting up of an opposing electromotive force, both of which tend materially to weaken the current of the battery, or that passing through the cell. Origin: Cf. F. Polarization. Source: Websters Dictionary (01 Mar 1998) |
| polarization colours | <microscopy> Interference colours produced by anisotropic substances placed between two polarizing elements and examined by transmitted white light. See: Michel-Levy scale of retardation colours. (05 Aug 1998) |
| polarization microscopy | <procedure> Any form of microscopy capable of detecting birefringent objects. Usually performed with a polarizing element below the stage to produce plane polarized light and an analyser that is set to give total extinction of the background and thus to detect any birefringence. (18 Nov 1997) |
| polarize | To communicate polarity to. Origin: Cf. F. Polarizer. Source: Websters Dictionary (01 Mar 1998) |
| polarized light | <microscopy> Light that is vibrating in one plane (plane-polarized light), light with a rotary vibration (circular polarized light), or light that is vibrating elliptically (elliptically polarized light). Moonlight and skylight are polarized, as is much reflected light, cloud light is polarized under certain conditions. However, naturally polarized light is, on the whole, rather imperfectly polarized. (05 Aug 1998) |
| polarized light microscope | <instrument, microscopy> A microscopical polarizcope, i.e., a compound microscope which is equipped with two polars and a Bertrand lens, chemists and mineralogists are the principal users. (05 Aug 1998) |
| Polaroid |
(trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare
출처: wordnet.princeton.edu/perl/webwn
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| polarization |
the phenomenon in which waves of light or other radiation are restricted in direction of vibration the condition of having or giving polarity
출처: wordnet.princeton.edu/perl/webwn
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| polar cataract |
an anterior or posterior subcapsular opacity, usually disk-shaped; the anterior cataract is the more common; the posterior reduces visual acuity more often.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| polar bodies |
1. the small nonfunctional cells with a haploid chromosome complement, consisting of a small amount of cytoplasm and a nucleus, resulting from unequal division of the primary oocyte (first polar b.) and, if fertilization occurs, of the secondary oocyte (second polar b.); the polar body appears as a speck at the animal pole of the egg. 2. metachromatic granules located at one or both ends of a bacterial cell.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| polar cap |
a chromophilic, saclike organelle occurring beneath the spore wall in the polar region of microsporidian protozoa. Called also polar capsule.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| polar | a relation between two opposite attributes or tendencies |
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| polar | having an indicated pole (as the distinction between positive and negative electric charges) |
| polar | the phenomenon in which waves of light or other radiation are restricted in direction of vibration |
| polar | the condition of having or giving polarity |
| polar | become polarized in a conflict or contrasting situation |
| polar | cause to concentrate about two conflicting or contrasting positions |
| polar | cause to vibrate in a definite pattern |
| polar | of or involving polarography |
| polar | an electrochemical method of chemical analysis |
| polar | (trade name) a plastic film that can polarize a beam of light |
| polar | (trade name) a camera that develops and produces a positive print within seconds |
| polar | (trade name) a camera that develops and produces a positive print within seconds |