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Author - Santhakumar Raja

Basic Construction of Transmission Electron Microscope (TEM)
  • Health Science

Transmission Electron Microscope (TEM) – theteche.com

March 5, 2023
by Santhakumar Raja
6 min read
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Transmission electron microscope utilise an electron beam which passes through and interacts with an ultra-thin sample to produce an image, which is then magnified and focused on an imaging device (a fluorescent screen), on a...

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Construction of the Sample stage
  • Health Science

Scanning Electron Microscopy (SEM) – theteche.com

March 5, 2023
by Santhakumar Raja
5 min read
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Scanning electron microscopy utilises electron beam for producing high-resolution images of sample surfaces. It forms 3-D view of the sample. It also gives the surface topography of the sample with sufficient clarity and depth of...

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Quantitative Measurement of Bacterial Growth
  • Health Science

Quantitative Measurement of Bacterial Growth

March 5, 2023
by Santhakumar Raja
4 min read
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The term growth in microbiology indicates the magnitude of total population. Microbial growth measurement is essential for: Determining the growth and reproduction rate, Determining the suitability of water, milk, and food for...

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Schematic illustration showing isolation of a single bacterium from a mixture of cells on an agar gel
  • Health Science

Single Cell Isolation Methods – theteche.com

February 18, 2023
by Santhakumar Raja
2 min read
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In this method, an individual desired cell is picked up from the mixed culture and allowed to grow. For this purpose following two methods are used: Capillary Pipette Method : In this method (figure), a few small drops of a...

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Spread Plate Method
  • Health Science

Isolation Methods for Pure Cultures of Bacteria

February 17, 2023
by Santhakumar Raja
6 min read
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Culture is a procedure during which microorganisms are cultivated in a medium; if a culture has the population of a single type of microorganism; it is known as a pure culture. Usually, isolation and growth of pure cultures of...

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Jar for Cultivating Anaerobic Bacteria on Petri Plates
  • Health Science

Cultivation of Bacteria (Aerobes and Anaerobes)

February 17, 2023
by Santhakumar Raja
6 min read
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To cultivate a specific microbe, following methods are used : Methods of Culturing Aerobic Bacteria : An atmosphere having oxygen in ample amount facilitates the growth of aerobic or facultative bacteria. For this, a large...

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Forms of cocci
  • Health Science

Morphological Classification of Bacteria

February 12, 2023
by Santhakumar Raja
3 min read
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On the basis of morphology, bacteria are classified into the following three forms: Spherical : These are coccus bacteria which are spherical in shape. The word coccus originated from the Greek word kokkos meaning berry. They are...

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Cytoplasm and Cytoplasmic Inclusions
  • Health Science

Cytoplasm and Cytoplasmic Inclusions – theteche.com

February 11, 2023
by Santhakumar Raja
5 min read
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Structure enclosed by the cell membrane is known as cytoplasm, which is aqueous, semitransparent, elastic, and thick. Cytoplasm consists of 80% water and remaining 20% include proteins (enzymes), carbohydrates, lipids...

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Plasma (Cytoplasmic - Cell) Membrane
  • Health Science

Plasma (Cytoplasmic/Cell) Membrane

February 10, 2023
by Santhakumar Raja
3 min read
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Immediately below the cell wall, plasma membrane is present which is also known as cytoplasmic membrane, inner membrane, or cell membrane. In prokaryotes, plasma membrane thickness is about 7.5nm (0.0075μm). Phospholipids :...

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Gram Negative Cell Wall
  • Health Science

Gram Positive and Gram Negative Cell Wall

January 31, 2023
by Santhakumar Raja
3 min read
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Gram-Positive Bacterial Cell Wall Cell wall of gram-positive bacteria (figure), is approximately 80nm thick having several layers of peptidoglycan. Peptidoglycan : It contributes to 50−90% of the dry weight of the cell wall...

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  • Growth of Animal Cells in Culture
  • Evaluation of Microbial Stability of Formulations
  • Preservation of Pharmaceutical Products Using Antimicrobial Agents
  • Assessment of Microbial Contamination and Spoilage
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  • Cup-Plate or Cylinder-Plate Method
  • Turbidimetric or Tube Assay Method
  • Methods for Standardisation of Antibiotics

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Featured Posts

  • Growth of Animal Cells in Culture
    by Santhakumar Raja
  • Evaluation of Microbial Stability of Formulations Evaluation of Microbial Stability of Formulations
    by Santhakumar Raja
  • Preservation of Pharmaceutical Products Using Antimicrobial Agents Preservation of Pharmaceutical Products Using Antimicrobial Agents
    by Santhakumar Raja
  • Assessment of Microbial Contamination and Spoilage Assessment of Microbial Contamination and Spoilage
    by Santhakumar Raja
  • Standardisation of Amino Acids Standardisation of Amino Acids – theteche.com
    by Santhakumar Raja
  • Cavities Prepared in Sterile Agar Medium for Assay of Antibiotics Cup-Plate or Cylinder-Plate Method
    by Santhakumar Raja
  • Microbiological Assay by Tube Assay Method Turbidimetric or Tube Assay Method
    by Santhakumar Raja
  • Curve of Diameter of Zone of Inhibition versus Log Concentration of Antibiotics Methods for Standardisation of Antibiotics
    by Santhakumar Raja
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