biology

J. S. Guleria

J. S. Guleria is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand J. S. Guleria rather than just read about it. In short: Jagdev Singh Guleria (1927 or 1928 – 22 January 2026) was an Indian general physician and cardiologist who was the Dean and Professor of the All India Institute of Medical Sciences, New Delhi. He was the senior consultant of General Medicine at Sitaram Bhartia Institute of Science and Research and an Emeritus Professor of the National Academy of Medical Sciences.

Key takeaways

J. S. Guleria belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect J. S. Guleria to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of J. S. Guleria from memory before moving on to harder problems.

Reference excerpt

Jagdev Singh Guleria (1927 or 1928 – 22 January 2026) was an Indian general physician and cardiologist who was the Dean and Professor of the All India Institute of Medical Sciences, New Delhi. He was the senior consultant of General Medicine at Sitaram Bhartia Institute of Science and Research and an Emeritus Professor of the National Academy of Medical Sciences. He received the fourth highest Indian civilian honour of the Padma Shri in 2003.

Life and career After graduating in medicine (MBBS) in 1953 and completing his master's degree (MD) in 1957 from Punjab University, Guleria secured a DM in cardiology from the All India Institute of Medical Sciences Delhi (AIIMS) in 1962 to join AIIMS as its faculty to start his career. He was on duty at AIIMS when former Indian Prime Minister Indira Gandhi was brought to AIIMS after being shot at by militants in October 1984, and attended to the former Prime Minister before she was declared dead. He headed the AIIMS Ethics Committee which investigated the irregularities at AIIMS, including the charges leveled against the then Director of the institution, Panangipalli Venugopal. He was one of the two doctors, the other being K. K. Malhotra, delegated to examine Jayaprakash Narayan during his incarceration in the Emergency period. Guleria, an elected fellow and Emeritus Professor of the National Academy of Medical Sciences, has delivered many orations including the S. K. Malik Memorial Oration of the Post Graduate Institute of Medical Education and Research (PGIMER) in 1998. He was associated with the Health For All (HFA) initiative of the World Health Organization and presented the lead paper at the fourteenth session of the South East Asia Advisory Committee on Health Research at Colombo in 1998. He was a Fellow of American College of Chest Physicians (FCCP) (1962), Indian Academy of Medical Sciences (FAMS) (1971), and the Indian College of Chest Physicians (FICCP) (1981) and one of the founder fellows of Indian College of Physicians. The Government of India awarded him the civilian honour of the Padma Shri in 2003. The All India Institute of Medical Sciences Delhi honoured him with Lifetime Achievement Award in 2014. Guleria's sons, Randeep Guleria, a pulmonologist with AIIMS, is also a winner of Padma Shri, and Sandeep Guleria, a surgeon, is also a winner of Padma Shri. Guleria died on 22 January 2026, at the age of 98.

Worked examples

Example 1 — a first encounter with J. S. Guleria

Start with the simplest possible case. Write down what J. S. Guleria claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to J. S. Guleria before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about J. S. Guleria ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of J. S. Guleria

In research: J. S. Guleria appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses J. S. Guleria in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: J. S. Guleria is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1920s births, 2026 deaths, 20th-century Indian medical doctors, so understanding it makes those chapters shorter.
In everyday life: Look for J. S. Guleria outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study J. S. Guleria in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what J. S. Guleria means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain J. S. Guleria out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is J. S. Guleria in simple terms?

Why does J. S. Guleria matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study J. S. Guleria?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on J. S. Guleria.