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Sagar Aryal, PhD

Dr. Sagar Aryal is a microbiologist, researcher, and science communicator from Nepal. He is also co-founder and Research Head of the Department of Natural Products at the Kathmandu Research Institute for Biological Sciences (KRIBS), where he leads research on natural product discovery and microbial biodiversity. Dr. Aryal earned his Ph.D. in Microbiology from Tribhuvan University, Kathmandu, Nepal, in 2025, supported by a DAAD Research Grant and a University Grants Commission (UGC) Nepal Ph.D. Fellowship. His research interests include Actinomycetes, Myxobacteria, microbial taxonomy, and natural products, particularly the discovery of bioactive compounds with potential pharmaceutical applications. He isolated and identified Nocardia nepalensis, a novel bacterial species from Nepal, contributing to understanding microbial diversity in the region. Dr. Aryal has published more than 16 research articles in international journals and contributed three book chapters to established academic publications. He has presented scientific research findings and developed international research collaborations through visits to more than 18 countries across Asia, Europe, North America, and Oceania. From 2023 to 2025, he served as the American Society for Microbiology (ASM) Young Ambassador to Nepal. Since December 2025, he has served as an Editorial Board Member of Scientific Reports, a Nature Portfolio journal. In recognition of his scientific contributions, Dr. Aryal received the NAST Science and Technology Youth Award 2025 from the Nepal Academy of Science and Technology. He previously received the Frs. Locke and Stiller Research Award (LSRA) for the 2017-2018 cycle from St. Xavier's College, Kathmandu, and a Nepal Academy of Science and Technology (NAST) Research Grant for 2017-2018. Alongside his scientific career, Dr. Aryal has more than 15 years of experience in blogging, content writing, and search engine optimization (SEO).

Methyl Red (MR) Test- Principle, Procedure, Results, Uses

January 27, 2022January 21, 2022 by Sagar Aryal, PhD
Result Interpretation of Methyl Red (MR) Test

Objectives of Methyl Red (MR) Test To differentiate two major types of facultative anaerobic enteric bacteria based on the production of acid. It identifies bacterial ability to produce stable acid end … Read more

Cytokines vs Chemokines- Definition and 8 Major Differences

May 4, 2022January 20, 2022 by Sagar Aryal, PhD
Differences between Cytokines and Chemokines

Differences between Cytokines and Chemokines Here are some differences: S.N. Characteristics Cytokines Chemokines 1. Definition Small proteins produced dominantly by immune cells which are important in cell signaling. Specific cytokines … Read more

MRS Broth Test- Principle, Procedure and Results

January 27, 2022January 20, 2022 by Sagar Aryal, PhD
Result Interpretation of MRS Broth Test

Objectives of MRS Broth Test It is used for the cultivation and enumeration of lactobacilli in a laboratory setting To determine the ability of organism to form gas during glucose fermentation … Read more

Gamma-ray Spectroscopy- Definition, Principle, Parts, Uses

March 1, 2022January 20, 2022 by Sagar Aryal, PhD
gamma-ray spectrometer

Gamma rays are an ultrahigh-frequency of light that is emitted by radioactive elements, energetic celestial bodies such as black holes and neutron stars, and high energy events such as nuclear … Read more

Humoral vs Cell mediated Immunity- Definition, 20 Differences

January 26, 2022January 19, 2022 by Sagar Aryal, PhD
Differences between Humoral Immunity and Cell mediated Immunity

Image Source: Pinterest. Here are some differences: S.N. Characteristics Humoral Immunity Cell-mediated Immunity 1. Definition The immunity mediated by macromolecules found in the extracellular body fluids is called humoral immunity. … Read more

Motility Test- Objectives, Principle, Procedure, Results, Limitation

January 27, 2022January 19, 2022 by Sagar Aryal, PhD
Motility Test- Principle, Procedure and Results

Objectives of Motility Test To determine the motility of bacterium. To differentiate between motile and non motile bacteria. Principle of Motility Test Motility is the ability of an organism to move by itself … Read more

RBC vs WBC- Definition and 19 Major Differences

February 22, 2022January 19, 2022 by Sagar Aryal, PhD
Differences between RBCs and WBCs

RBC vs WBC (Table form) S.N. Characteristics Red Blood Cells (RBCs) White Blood Cells (WBCs) 1. Alternative Name Erythrocytes Leucocytes 2. Origin In the embryonic phase, they are formed in … Read more

Paper Chromatography- Definition, Types, Principle, Steps, Uses

April 21, 2022January 19, 2022 by Sagar Aryal, PhD
Paper Chromatography

What is Paper Chromatography? Paper chromatography (PC) is a type of planar chromatography whereby chromatography procedures are run on a specialized paper. PC is considered to be the simplest and … Read more

Laboratory Diagnosis, Treatment and Prevention of Shigella dysenteriae

September 5, 2022January 18, 2022 by Sagar Aryal, PhD
Laboratory Diagnosis, Treatment and Prevention of Shigella dysenteriae

Specimens: stool, mucus flecks, and rectal swabs for culture. Large numbers of fecal leukocytes and some red blood cells often are seen microscopically. Microscopic examination Microscopic examination of stool smears … Read more

B Cells vs T Cells- Definition and 17 Key Differences

January 26, 2022January 18, 2022 by Sagar Aryal, PhD
Differences between B Cells and T Cells

Differences between B Cells and T Cells The major differences between them are: S.N. Characteristics B  lymphocytes (B cells) T lymphocytes (T cells) 1. Site of Maturation B lymphocytes both … Read more

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