oil in Biological Definition

Microscope

... often have a fourth objective lens, called an oil immersion lens. To use this lens, a drop of oil is placed on top of the cover slip, and the lens ... into place where it is immersed in the oil. An oil immersion lens usually has a power of 100×. ...

Alcohol

... alcohols are generally produced by synthetic routes from natural gas , oil , or coal feedstocks, for example via acid catalysed hydration of ... ethene or other alkenes from cracking of fractions of distilled crude oil . Uses a catalyst of phosphoric acid under high temperature and ....

Bacterium

... of digesting the hydrocarbons in petroleum are often used to clean up oil spills . Some beaches in Prince William Sound were fertilized in an ... the growth of such bacteria after the infamous 1989 Exxon Valdez oil spill . These efforts were effective on beaches that were not too thickly ...

Bacterium

... of digesting the hydrocarbons in petroleum are often used to clean up oil spills . Some beaches in Prince William Sound were fertilized in an ... the growth of such bacteria after the infamous 1989 Exxon Valdez oil spill . These efforts were effective on beaches that were not too thickly ...

Immune system

... into a host. With the adjuvant, the response is much more robust. Historically, a commonly used formula Freund's Complete Adjuvant , an emulsion of oil and mycobacterium . It was later discovered that toll-like receptors, expressed on innate immune cells, are critical in the activation of adaptive ...

Lipid

... of disorder) of the polar molecules in the liquid increases. This is essentially a form of phase separation, similar to the spontaneous separation of oil and water into two separate phases when one puts them together. Figure 2: Self-organization of lipids. A lipid bilayer is shown on ...

Polymerase chain reaction

... for each step of the reaction. To prevent evaporation of the reaction mixture, a heated lid is placed on top of the reaction tubes or a layer of oil is put on the surface of the reaction mixture. These machines cost in the order of USD 2,500 in 2004 . Primers The DNA fragment to be ...