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Oil immersion objective lenses look superficially identical to non-oil immersion lenses. 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 ...
AOR – additional oil recovery; AP – alkali-polymer; APD – application for permit to drill; API – American Petroleum Institute: organization which sets unit standards in the oil and gas industry °API – degrees API (gravity of oil) APPRE – appraisal report; APS – active pipe support; APWD – annular pressure while drilling (tool) [5]
Some microscopes make use of oil-immersion objectives or water-immersion objectives for greater resolution at high magnification. These are used with index-matching material such as immersion oil or water and a matched cover slip between the objective lens and the sample. The refractive index of the index-matching material is higher than air ...
However, for most applications it is recommended that oil immersion be used with fixed (dead) specimens because live cells require an aqueous environment, and the mixing of oil and water can cause severe spherical aberrations. For some applications silicone oil can be used to produce more accurate image reconstructions. Silicone oil is an ...
As with objective lenses, a condenser lens with a maximum numerical aperture of greater than 0.95 is designed to be used under oil immersion (or, more rarely, under water immersion), with a layer of immersion oil placed in contact with both the slide/coverslip and the lens of the condenser. An oil immersion condenser may typically have NA of up ...
BP agreed to pay workers who got ill after exposure to oil and a chemical dispersant used to break it up. Takeaways from AP's story on the BP oil spill medical settlement's shortcomings Skip to ...
Until early last year, a rusting oil ship named the Trinity Spirit floated off the coast of Nigeria, pulling crude oil from the ocean floor. Then, last February, it exploded, collapsing into the ...
Microscopic examination using an oil immersion lens. (Look for multinucleated giant cells) [ 7 ] A modified test can be performed using proprietary agents which requires fewer steps and allows the sample to be fixed quicker.