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2. Oil immersion - Wikipedia

   en.wikipedia.org/wiki/Oil_immersion

   In light microscopy, oil immersion is a technique used to increase the resolving power of a microscope. This is achieved by immersing both the objective lens and the specimen in a transparent oil of high refractive index, thereby increasing the numerical aperture of the objective lens. Without oil, light waves reflect off the slide specimen ...

3. Index-matching material - Wikipedia

   en.wikipedia.org/wiki/Index-matching_material

   Index-matching material. In optics, an index-matching material is a substance, usually a liquid, cement (adhesive), or gel, which has an index of refraction that closely approximates that of another object (such as a lens, material, fiber-optic, etc.). When two substances with the same index are in contact, light passes from one to the other ...

4. Becke line test - Wikipedia

   en.wikipedia.org/wiki/Becke_line_test

   The Becke line test is a technique in optical mineralogy that helps determine the relative refractive index of two materials. It is done by lowering the stage (increasing the focal distance) of the petrographic microscope and observing which direction the light appears to move. This movement will always go into the material of higher refractive ...

5. Viscosity index - Wikipedia

   en.wikipedia.org/wiki/Viscosity_index

   Viscosity index. The viscosity index (VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils. The lower the VI, the more the viscosity is affected by changes in temperature.

6. Live-cell imaging - Wikipedia

   en.wikipedia.org/wiki/Live-cell_imaging

   Live-cell imaging is the study of living cells using time-lapse microscopy. It is used by scientists to obtain a better understanding of biological function through the study of cellular dynamics. [1] Live-cell imaging was pioneered in the first decade of the 21st century. One of the first time-lapse microcinematographic films of cells ever ...

7. Dark-field microscopy - Wikipedia

   en.wikipedia.org/wiki/Dark-field_microscopy

   A cross-section of a nematode, photographed with an oil dark field condenser with a numerical aperture of 1.40. In optical microscopy, dark-field describes an illumination technique used to enhance the contrast in unstained samples. It works by illuminating the sample with light that will not be collected by the objective lens and thus will not ...

8. AOL Mail

   mail.aol.com

   You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

9. SAE J300 - Wikipedia

   en.wikipedia.org/wiki/SAE_J300

   SAE J300. SAE J300 is a standard that defines the viscometric properties of mono- and multigrade engine oils, maintained by SAE International. [1] Key parameters for engine oil viscometrics are the oil's kinematic viscosity, its high temperature-high shear viscosity measured by the tapered bearing simulator, and low temperature properties ...