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Introduction to eubacteria


1. They were first observed in rainy water and later in teeth scum by Leeuwenhoek (1675) and called them “Animalcule”.

This discovery was published in his book “The Secrets of Nature Discovered by Leeuwenhoek”.

2. F. J. Cohn and Ehrenberg first of all coined the name “Bacteria”.

3. Bergey placed bacteria in “Prosophyta group” and wrote a book “Manual of Determinative Microbiology”. This book is known as “Bible of bacterial classification”.

4. Lister developed “culture technique”. He also developed the “sterilization technique” to sterilize the surgical instruments. He is regarded as father of antiseptic surgery

He discovered the antiseptic… (671 more words) …

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Structure of Eubacteria

Bacterial cell have a chemically complex cell envelope. The cell envelope consists of a tightly bound three layered structure.

  1. Outermost glycocalyx (may be capsule or slime layer)

  2. Cell wall

  3. Cell membrane

Although each layer of the envelope performs distinct function they act together as a single protective unit.

1. Capsule or Glycocalyx or Slime layer -

  • When bacteria are surrounded by capsule, called as capsulated bacteria. Formation of capsule is done by cell membrane. Capsulated bacteria are mostly pathogenic.
  • Capsule is made up of unknown polysaccharides and polypeptides.
  • Capsule protects the bacteria from W. B. C. and also helps in… (521 more words) …

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