List of four air-borne microorganisms:- 1. Bacteria 2. Protozoa 3. Microalgae 4. Micro-Fungi. 1. Bacteria: Bacteria comprise a heterogeneous group varying in size from 0.3 to 10-15 µm and those bacteria that are capable of withstanding prolonged desication only can persist in air for long periods. Fortunately, such forms are saprophytic. Among these are sporulating species of bacilli, cocci like [...]
The following points highlight the ten economically important materials that are being deteriorated by the activity of microorganisms. The economically important materials are: 1. Pulp Wood 2. Paper-Pulp 3. Finished Paper 4. Textile and Cordage 5. Painted Surfaces 6. Rubber 7. Leather 8. Metal Corrosion 9. Wood Deterioration 10. Food Spoilage. Material # 1. Pulp-Wood: Pulp-wood represents the wood which [...]
The following points highlight the top three devices used for the removal of microorganisms from air. The devices are: 1. Settling Plate 2. Sieve Device 3. Modern Samplers. Device # 1. Settling Plate: A Petri dish containing agar medium is kept covered and, at the time of sampling, the cover is removed from the Petri dish so that the agar [...]