Sagar Aryal

Sagar Aryal is a microbiologist and a scientific blogger. He attended St. Xavier’s College, Maitighar, Kathmandu, Nepal, to complete his Master of Science in Microbiology. He worked as a Lecturer at St. Xavier’s College, Maitighar, Kathmandu, Nepal, from Feb 2015 to June 2019. After teaching microbiology for more than four years, he joined the Central Department of Microbiology, Tribhuvan University, to pursue his Ph.D. in collaboration with Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Saarbrucken, Germany. He is interested in research on actinobacteria, myxobacteria, and natural products. He has published more than 15 research articles and book chapters in international journals and well-renowned publishers.

Antimicrobial Susceptibility Testing (AST)- Types and Limitations

September 25, 2022August 18, 2022 by Sagar Aryal

In the treatment and control of infectious diseases, especially when caused by pathogens that are often drug-resistant, susceptibility (sensitivity) testing is used to select effective antimicrobial drugs. Susceptibility testing is … Read more

Fat soluble vitamins- Vitamin A, D, E and K

September 5, 2022August 17, 2022 by Sagar Aryal

Vitamins refer to any of a group of organic compounds which are essential for normal growth and nutrition and are required in small quantities in the diet. Vitamins are biologically … Read more

Eukaryotic DNA Replication- Features, Enzymes, Process, Significance

September 17, 2022August 17, 2022 by Sagar Aryal

DNA replication is the process by which an organism duplicates its DNA into another copy that is passed on to daughter cells. Replication occurs before a cell divides to ensure that … Read more

Biochemical Test of Listeria monocytogenes

January 18, 2023August 17, 2022 by Sagar Aryal

Basic Characteristics Properties (Listeria monocytogenes) CAMP Positive (+ve) Catalase Positive (+ve) Flagella Flagellated Gas Negative (-ve) Gram Staining Positive (+ve) H2S Negative (-ve) Hemolysis Beta Hemolysis Indole Negative (-ve) Motility … Read more

Golgi Apparatus- Definition, Structure, Functions and Diagram

September 25, 2022August 16, 2022 by Sagar Aryal

Golgi Apparatus- Structure and Functions

Golgi Apparatus Definition The Golgi apparatus or the Golgi body or Golgi complex or simply Golgi is a cellular organelle present in most of the cells of the eukaryotic organisms. It is referred … Read more

Enzymes- Properties, Classification and Significance

September 10, 2022August 16, 2022 by Sagar Aryal

Lock and key model and Induced fit model

Enzymes are the biological macromolecules which speed up the rate of biochemical reactions without undergoing any change. They are also called as biological catalysts. An enzyme is a highly selective catalyst … Read more

Purine Synthesis

September 5, 2022August 15, 2022 by Sagar Aryal

There are two pathways of synthesis of purine nucleotides: De Novo synthesis pathway, and Salvage pathway. The De novo synthesis of Purine The de novo synthesis of purine nucleotide means … Read more

Cholesterol structure and synthesis

September 5, 2022August 14, 2022 by Sagar Aryal

Cholesterol Structure Figure: Cholesterol Structure Although cholesterol is synthesized in most tissues of the body where it serves as a component of cell membranes, it is produced mainly in the … Read more

Biochemical Test of Francisella tularensis subsp. tularensis

January 13, 2023August 13, 2022 by Sagar Aryal

Image Source: New York State Health Department Some of the characteristics are as follows: Basic Characteristics Properties (Francisella tularensis subsp. tularensis) Capsule Positive (+ve) Catalase Positive (+ve) Flagella Negative (-ve) … Read more

The Wobble Hypothesis

January 13, 2023August 13, 2022 by Sagar Aryal

The Wobble Hypothesis The wobble hypothesis states that the base at 5′ end of the anticodon is not spatially confined as the other two bases allowing it to form hydrogen … Read more