List of nine important antimicrobial agents:- 1. Phenol and Phenol Derivatives 2. Alcohols 3. Halogens 4. Heavy Metal and their Compounds 5. Aldehydes 6. Gaseous Agents 7. Dyes 8. Detergents 9. Quaternary Ammonium Compounds. Antimicrobial Chemical Agent # 1. Phenol and Phenol Derivatives: Phenol is obtained by distillation of coal-tar. It is credited to be the first disinfectant used in [...]
In this article we will discuss about the microorganisms in relation to plant growth. 1. Rhizosphere: What are Rhizosphere and Rhizoplane? Rhizosphere refers to the region in the vicinity of roots in which the maximum microbial growth and activities operate (Fig. 34.1). The term 'rhizosphere' was first used by Lorenz. Hiltner a German scientist, in 1904. Greater microbial growth and [...]
In this article we will discuss about the chemical nature of the genetic material of organisms. The knowledge about the chemical nature of the genetic material was gathered from a number of experimental observations made with bacteria and viruses. These experimental observations led to the conclusion that all cellular organisms have DNA (deoxyribonucleic acid) as the genetic material. Only some [...]