In this article we will discuss about the design of atomic force microscope, explained with the help of a diagram. An atomic force microscope instead of using a lens is provided with a probe to examine the surface of a specimen with a sharp tip which may be several micrometers in and less than 10 nm in diameter at the [...]
In this article we will discuss about the design of transmission electron microscope, explained with the help of a diagram. In TEM a finely focused beam of electrons from an electron gun is passed through a specially prepared ultra thin section of the specimen. The beam is focused on a small area of the specimen by an electromagnetic condenser lens. [...]
The microorganisms depending upon their needs to grow in their natural homes or ecological niche may be grouped into the following broad categories keeping in view their requirement for oxygen, source of energy (carbon) and temperature. (A) On basis of their oxygen requirement they are grouped as: (i) Aerobes or aerobic microorganisms which have capability to grow on media or [...]