Five Kingdom System of Classification- Features and Limitations

Five Kingdom System of Classification

Five Kingdom System of Classification- Features and Limitations Taxonomy refers to the science of classification of living organisms. According to Bergey’s Manual of Systematic Bacteriology, taxonomy consists of three separate but interrelated areas: classification, nomenclature, and identification. Classification is the arrangement of organisms into taxonomic groups known as taxa on the basis of similarities or … Read moreFive Kingdom System of Classification- Features and Limitations

Experiments in support and against Spontaneous Generation

Spontaneous Generation

Experiments in support and against Spontaneous Generation Spontaneous generation is an obsolete theory which states that living organisms can originate from inanimate objects. The theory believed that dust created fleas, maggots arose from rotting meat, and bread or wheat left in a dark corner produced mice among others. Although the idea that living things originate … Read moreExperiments in support and against Spontaneous Generation

Robert Koch and Koch’s Postulates

Robert Koch and Koch’s Postulates

Robert Koch and Koch’s Postulates Heinrich Hermann Robert Koch (1843 – 1910) provided remarkable contributions to the field of microbiology. He was a German general practitioner and a famous microbiologist. He is credited to be one of the founders of the specific field of modern bacteriology. As the founder, he identified the specific causative agents of … Read moreRobert Koch and Koch’s Postulates

History of Microbiology

History of Microbiology

History of Microbiology Physics began in ancient times, mathematics even earlier, but the knowledge of tiny living things, their biology, and their impact on human lives has only been around since the late 19th century. Until about the 1880s, people still believed that life could form out of thin air and that sickness was caused … Read moreHistory of Microbiology

Louis Pasteur and his contributions

Louis Pasteur and his contributions

Louis Pasteur and his contributions Louis Pasteur was a French chemist and microbiologist considered the most important founders of Microbiology. Microbiology developed as a scientific discipline from the era of Louis Pasteur (1822- 1895) himself. He first coined the term “microbiology” for the study of organisms of microscopic size. For his innumerable contributions in the field, he … Read moreLouis Pasteur and his contributions

Beta-Lactamase and Ambler classification

Beta-Lactamase and Ambler classification

Beta-Lactamase and Ambler classification β-lactamase enzymes are capable of hydrolysing the β-lactam rings (the active site) of β-lactam antibiotics; thereby deactivating their antibacterial properties. It is observed in both gram-positive and gram-negative bacteria. They are plasmid coded, and transferred from one bacterium to other mostly by conjugation, (except in Staphylococcus aureus where they are transferred by … Read moreBeta-Lactamase and Ambler classification

Water Quality Analysis by Most Probable Number (MPN)

Water Quality Analysis by Most Probable Number (MPN)

Water Quality Analysis by Most Probable Number (MPN) Most probable number (MPN) analysis is a statistical method based on the random dispersion of microorganisms per volume in a given sample. In this method, measured volumes of water are added to a series of tube containing a liquid indicator growth medium. The media receiving one or … Read moreWater Quality Analysis by Most Probable Number (MPN)

Water Quality Analysis by Membrane Filter (MF) Technique

Membrane Filter (MF) Technique

Water Quality Analysis by Membrane Filter (MF) Technique The Membrane Filter (MF) Technique was introduced in the late 1950s as an alternative to the Most Probable Number (MPN) procedure for microbiological analysis of water samples. It involves the use of membrane filters, which are thin porous sheet structures composed of cellulose esters or similar polymeric … Read moreWater Quality Analysis by Membrane Filter (MF) Technique

Cilia and Flagella- Structure and Functions

Cilia and Flagella- Structure and Functions

Cilia and Flagella- Structure and Functions Cilia and Flagella are complex filamentous cytoplasmic structure protruding through cell wall. They are minute, specially differentiated appendices of the cell. Flagella (singular = flagellum) are long, hair-like structures that extend from the plasma membrane and are used to move an entire cell. Cilia (singular = cilium) are short, … Read moreCilia and Flagella- Structure and Functions

Isolation of Actinomycetes from Soil sample

Procedure of Isolation of Actinomycetes

Isolation of Actinomycetes from Soil sample Actinomycetes are classified as a group of gram-positive bacteria that are unique for their spore forming abilities and formation of mycelia structures. They show marked chemical and morphological diversity but form a distinct evolutionary line of organisms that range from coccoid and pleomorphic forms to branched filaments. These bacteria … Read moreIsolation of Actinomycetes from Soil sample