Electron microscopes are of three basic designs – the transmission electron microscope, scanning electron microscope and the scanning transmission electron microscope. The third one is a hybrid of the two, Specimen as the name implies. Scanning and transmission electron microscopes are similar in that each uses a beam of electrons to produce an image. However, the instruments use quite different [...]
Here is a list of some bacteria which causes diseases in man. Also learn about its prevention and control. 1. Salmonella Typhosa: Rods, 0.6 to 0.7 by 2 μ, occurring singly, in pairs, and occasionally in short chains. Motile by means of peritrichous flagella; sometimes non-motile. Gram-negative. Disease Produced – The cause of typhoid fever in man. An acute infectious [...]
In this article we will discuss about:- 1. Meaning of Neoplasms 2. Growth Characteristics of Neoplasms 3. Cellular Basis 4. Benign and Malignant 5. Classification 6. Host Responses. Meaning of Neoplasms: Neoplasia, literally meaning 'new growth', is a disorder characterized by the abnormal and continuous growth of cells which are no longer subject to the homeostatic controls which maintain the [...]