Avatar for Sourav Pan

Sourav Pan

Founder of Biology Notes Online, Biology & Microbiology Educator, M.Sc. in Microbiology
Expertise
Microbiology, Immunology, Cell Biology, Molecular Biology, Genetics, Biotechnology, Biochemistry, Botany, Zoology
Education
University of Calcutta
Profile Last Updated: July 17, 2026

Sourav Pan is the founder and sole author of Biology Notes Online. He holds a Bachelor of Science (B.Sc.) degree and an M.Sc. in Microbiology from the University of Calcutta. He creates educational resources covering microbiology, immunology, biotechnology, genetics, cell biology, botany, zoology, and other life-science subjects.

His goal is to make complex biological concepts easier to understand through well-structured, student-friendly articles based on academic textbooks, peer-reviewed research, and authoritative scientific sources. In addition to writing new content, he regularly reviews and updates articles to improve their accuracy, clarity, and educational value.

Physical Methods of Sterilization

Physical Methods of Sterilization

What is Sterilization? Physical methods of sterilization Physical methods of sterilization involves the control of microbial growth by using Sunlight, Heat, Filtration, Radiation, etc. Physical methods of sterilization include the following: A. Heat Sterilization Heat sterilization is a fundamental technique in microbiology and medical sterilization, notable for its efficiency in destroying microorganisms through thermal means. … Read more

Methods For Maintenance and Preservation of Pure Cultures

Methods For Maintenance and Preservation of Pure Cultures

Discover essential techniques for the Maintenance and Preservation of Pure Cultures, focusing on bacterial and fungal preservation methods. This comprehensive guide covers best practices to ensure the longevity and purity of microbial cultures, making it an invaluable resource for researchers and laboratory professionals. The following points highlight the top 7 methods used for maintenance and … Read more

Archaea – Habitat, Structure, Characteristics, Importance, Examples

Archaea - Definition, Habitat, Characteristics, Importance, Examples

What is Archaea? Definition of Archaea Archaea are a domain of single-celled prokaryotic organisms distinct from bacteria, characterized by unique genetic, metabolic, and cellular features, and often found in extreme environments. Habitat of Archaea The habitat of Archaea is remarkably diverse, spanning from some of the most extreme environments on Earth to more common and … Read more

A-Z Zoology Terms With Definitions – Zoology Glossary

A-Z Zoology Terms With Definitions – Zoology Glossary

Zoology Terms Starting With A Zoology Terms Starting With B Zoology Terms Starting With C Zoology Terms Starting With D Zoology Terms Starting With E Zoology Terms Starting With F Zoology Terms Starting With G Zoology Terms Starting With H Zoology Terms Starting With I Zoology Terms Starting With J Zoology Terms Starting With K … Read more

A-Z Botany Terms With Definitions – Botany Glossary

A- Z Botany Terms With Definitions – Botany Glossary

Botany Terms Starting With A Botany Terms Starting With B Botany Terms Starting With C Botany Terms Starting With D Botany Terms Starting With E Botany Terms Starting With F Botany Terms Starting With G Botany Terms Starting With H Botany Terms Starting With I Botany Terms Starting With J Botany Terms Starting With K … Read more

A- Z Microbiology Terms With Definitions – Microbiology Glossary

Microbiology Terms and Terminology with Definitions

Microbiology Terms Starting With A Microbiology Terms Starting With B Microbiology Terms Starting With C Microbiology Terms Starting With D Microbiology Terms Starting With E Microbiology Terms Starting With F Microbiology Terms Starting With G Microbiology Terms Starting With H Microbiology Terms Starting With I Microbiology Terms Starting With J Microbiology Terms Starting With K … Read more

Herbarium – Definition, Technique, Importance, Examples

Herbarium - Definition, Technique, Importance, Examples

Herbariums are fascinating repositories of plant life, offering a unique window into the diverse flora that populates our world. In this comprehensive article, we’ll delve into the definition, importance, and captivating examples of these botanical treasure troves, providing you with a deeper understanding of these remarkable institutions. What is a Herbarium? – Meaning of Herbarium … Read more

Endemism – Definition, Characters, Theories, Types, Factors, Examples

Endemism - Definition, Characters, Theories, Types, Factors, Examples

What is Endemism? Endemism Definition Endemism is the condition where a species is native to and restricted to a specific geographic area, such as an island or country, and is not found naturally elsewhere. What is an Endemic Species? Types of Endemism Endemism can be categorized into several distinct types, each reflecting different evolutionary and … Read more

Retrovirus – Definition, Types, Structure, Replication

Structure of Retrovirus

What is a Retrovirus? Definition of Retrovirus A retrovirus is a type of RNA virus that replicates by converting its RNA genome into DNA through the enzyme reverse transcriptase. This DNA is then integrated into the host cell’s genome, where it directs the production of new viral particles. Retroviruses are associated with various diseases, including … Read more

Marchantia – Characteristics, Structure, Reproduction, Classification

Marchantia - Definition, Structure, Reproduction, Classification

Marchantia Marchantia is a genus of liverworts belonging to the family Marchantiaceae and the order Marchantiales. These liverworts are non-vascular plants that thrive in damp, shady environments. The thallus of Marchantia is differentiated into two distinct layers. The upper layer is photosynthetic and features a well-defined epidermis with pores. These pores facilitate gas exchange, crucial … Read more