Archive | Microorganisms

Nutritional Forms of Microorganisms (With Diagram)

In this article we will discuss about the nutritional forms of microorganisms. 1. Photolithoautotrophs: This group includes photosynthetic microalgae, cyanobacteria, and photosynthetic bacteria (purple sulphur bacteria and green sulphur bacteria). In photosynthetic microalgae and cyanobacteria the external energy-source is light. One or more varieties of chlorophyll are present to trap the solar energy. Such microorganisms are, therefore, largely green. The [...]

By |2016-09-16T06:10:48+00:00September 16, 2016|Microorganisms|Comments Off on Nutritional Forms of Microorganisms (With Diagram)
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Microorganisms Found in Extreme Environment: 6 Groups

The following points highlight the six important groups of microorganisms found in extreme environment. The groups are: 1. Acidophiles 2. Alkalophiles 3. Halophiles 4. Thermophiles and Hyperthermophiles 5. Psychrophiles 6. Barophiles. Group # 1. Acidophiles: Microorganisms that have their growth optimum between about pH 0 and 5.5. Several species of Thiobacillus and archaebacterial genera including Sulfolobus and Thermoplasma are acidophilic. [...]

By |2016-09-16T06:10:40+00:00September 16, 2016|Microorganisms|Comments Off on Microorganisms Found in Extreme Environment: 6 Groups
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Measurement of Cell Numbers and Cell Mass of Microorganisms

In this article we will discuss about the techniques used for measuring cell numbers and cell mass of microorganisms. Measurement (Count) of Cell Numbers: 1. Breed Method: A known volume of microbial cell suspension (0.01 ml) is spread uniformly over a glass slide covering a specific area (1 sq. cm). The smear is then fixed by heating, stained, examined under [...]

By |2016-09-16T06:10:36+00:00September 16, 2016|Microorganisms|Comments Off on Measurement of Cell Numbers and Cell Mass of Microorganisms
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