| polarizer | <physics> That which polarizes; especially, the part of a polarizcope which receives and polarizes the light. It is usually a reflecting plate, or a plate of some crystal, as tourmaline, or a doubly refracting crystal. <microscopy> A first polarizing element inserted before a preparation. When its vibration direction is at right angles to the vibration direction of the analyser, the field becomes black if no anisotropic specimen is on the stage or when viewing an anisotropic substance in an extinction position or directly down an optic axis of an anisotropic crystal. See: analyser, eyepiece, positive. (28 Oct 1998) |
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| polarizing element | <microscopy> A general term for a device for producing or analysing plane-polarized light. It may be a Nicol prism, some other form of calcite prism, a reflecting surface, or a polarizing filter. (05 Aug 1998) |
| polarizing power | <chemistry> Means that a charged species such as a proton can attract negatively charged electrons which causes a shift in the orbital. The higher the positive charge and the smaller the smaller the size, the greater the polarizing power of the species. (09 Jan 1998) |
| polarography | An electrochemical technique for identifying and estimating the concentration of reducible elements by means of the dual measurement of the current flowing through an electrochemical cell (which contains the test solution) and the electrical potential between the two electrodes as the potential is increased at a constant rate by an external voltage source. As the voltage reaches the standard electrode potential of the test substance, there is a sharp increase in current flow. The indicator electrode is usually a dropping mercury electrode. (12 Dec 1998) |
| polars | <microscopy> Two polarizing elements in a polarized light microscope. The polar placed between the light source and substage condenser is called the polarizer, the polar placed between the objective and ocular is called the analyser. The vibration directions of the two polars may be crossed 90 degrees, to achieve crossed polars, slightly uncrossing one polar gives slightly uncrossed polars, removing the analyser results in plane-polarized light. (05 Aug 1998) |
| polary | Tending to a pole; having a direction toward a pole. Source: Websters Dictionary (01 Mar 1998) |
| polar capsule |
1. any of the thick-walled vesicles seen in the spores of certain protozoa and containing the polar filament. 2. see under cap.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| polar ring |
an electron-dense, annular, anterior thickening of the pellicle of apicocomplexan protozoa, occurring at some stage in the life cycle, and forming part of the apical complex. Called also apical r.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| polar tube |
a hollow, extensible, filamentous tubular organelle found coiled in the spore of microsporidan protozoa, through which the sarcoplasm is injected into the host's tissues. Called also polar injecting filament.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| polar compound |
A polar compound is a substance whose molecules have relatively large dipole moments due to non-uniform charge distributions. Typically, polar compounds contain one or more of the highly electronegative elements nitrogen, oxygen, or fluorine. Because of their large dipole moments, polar compounds generally have high boiling points. The most polar organic compounds are capable of forming hydrogen bonds, either between molecules or intramolecularly. ...
출처: en.wikipedia.org/wiki/Polar_compound
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| polarity |
the pairing of complimentary capabilities. In all organisms, physiological polarity connects the individual's sensory and motor capabilities. In vertebrates, sexual polarity connects the submission of the female with the dominance of the male. In civilization, psychological polarity connects femininity and masculinity between individuals regardless of their gender. see also: analog.
출처: www.geocities.com/Athens/Delphi/5179/Glossary.htm
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