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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).

Czapek’s Agar (CZA)- Composition, Principle, Preparation, Results, Uses

May 4, 2022January 1, 2022 by Sagar Aryal, PhD
Czapek's Agar (CZA)

Czapek medium, also called Czapek’s agar (CZA) or Czapek-Dox medium, is a growth medium for propagating fungi and other organisms in a laboratory. It is recommended for use in qualitative procedures for the cultivation of saprophytic fungi, soil … Read more

Anthrax bacilli vs Anthracoid bacilli- 25 Differences

January 13, 2023January 1, 2022 by Sagar Aryal, PhD
Differences between Anthrax bacilli and Anthracoid bacilli

The saprophytic organisms which simulate the anthrax bacillus closely, both in their morphological and cultural characters within the group of Gram-positive aerobic sporing bacilli are termed as Anthracoid bacilli. They … Read more

Cystine Tryptic Agar- Composition, Principle, Preparation, Results, Uses

January 8, 2022January 1, 2022 by Sagar Aryal, PhD
Cystine Tryptic Agar

Cystine tryptic agar (CTA), also known as cystine trypticase agar, was developed by Vera as a semi-solid growth medium used for the identification and maintenance of microorganisms for extended periods … Read more

Peptone Water- Composition, Principle, Preparation, Results, Uses

January 8, 2022January 1, 2022 by Sagar Aryal, PhD
Peptone Water

Peptone Water is formulated as per Shread, Donovan, and Lee. It is a broth medium used for the growth of the organism and a base for determining carbohydrate fermentation patterns … Read more

Loeffler Medium- Composition, Principle, Preparation, Results, Uses

May 4, 2022January 1, 2022 by Sagar Aryal, PhD
Loeffler Medium

Loeffler Medium is a modification of the original formula developed by Loeffler in 1887. Loeffler medium enhances primary and secondary isolation and cultivation of fastidious pathogenic microorganisms, especially from the … Read more

Campylobacter Blood Agar (CVA)- Composition, Principle, Preparation, Results, Uses

January 8, 2022January 1, 2022 by Sagar Aryal, PhD
Campylobacter Blood Agar (CVA)

Campylobacter Blood Agar (CVA) is a selective medium used for the primary isolation of Campylobacter jejuni from stool specimens. Dekeyser et al. reported the isolation of Campylobacter jejuni from the feces of … Read more

Buffer and Extraction Buffer- Definition, Components, Significance

January 6, 2022October 17, 2021 by Sagar Aryal, PhD
Buffer and Extraction Buffer

A buffer is an aqueous solution consisting of a mixture of a weak acid and its salt (acidic buffer) or a weak base and its salt (basic buffer) that resists … Read more

Cell Disruption- Definition, Methods, Types, Significance

July 9, 2024October 10, 2021 by Sagar Aryal, PhD
Cell Disruption Methods

Mechanical Methods of Cell Disruption Mechanical methods are those methods that required some sort of force to separate out intracellular protein without adding chemical or enzyme Mortar & Pestle Blenders … Read more

Complement Components and its 7 functional categories

January 6, 2022October 1, 2021 by Sagar Aryal, PhD
Complement Components

Complement refers to a set of serum proteins that cooperates with both the innate and the adaptive immune systems to eliminate blood and tissue pathogens. Complement components can be classified … Read more

Protein Synthesis in Eukaryotes- Definition, Enzymes and Process

March 4, 2022September 23, 2021 by Sagar Aryal, PhD
Translation in Eukaryotes

Protein Synthesis involves translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis. It is the process in which ribosomes in the cytoplasm or ER synthesize proteins … Read more

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