Ratan Lal Brahmachary ( )(1932 - 13 February 2018) was a distinguished scientist and a pioneer of

tiger The tiger (''Panthera tigris'') is a large Felidae, cat and a member of the genus ''Panthera'' native to Asia. It has a powerful, muscular body with a large head and paws, a long tail and orange fur with black, mostly vertical stripes. It is ...

pheromone A pheromone () is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to affect the behavio ...

studies in

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

. He was widely known for his research in

s, although his academic background based on

Physics Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge whi ...

, specifically on

astrophysics Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline, James Keeler, said, astrophysics "seeks to ascertain the ...

under guidance of S.N. Bose. Brahmachary made significant contributions in tiger behavioral studies researching the animal for over 50 years. He studied many species of wildlife, notably big cats and undertook research trips to his favourite continent

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

fourteen times. Brahmachary studied ethology in the

Amazon basin The Amazon basin is the part of South America drained by the Amazon River and its tributary, tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries ...

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

and

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

with an ardent admirer of entomologist Gopal Chandra Bhattacharya. He once said in an interview He died in

pneumonia Pneumonia is an Inflammation, inflammatory condition of the lung primarily affecting the small air sacs known as Pulmonary alveolus, alveoli. Symptoms typically include some combination of Cough#Classification, productive or dry cough, ches ...

on 13 February 2018 in a city Nursing home in

Kolkata Kolkata, also known as Calcutta ( its official name until 2001), is the capital and largest city of the Indian state of West Bengal. It lies on the eastern bank of the Hooghly River, west of the border with Bangladesh. It is the primary ...

. Brahmachary had pledged his body to medical research. After paying respect his body was handed over to Radha Govinda Kar Hospital authorities.

Early life and education

Ratan Lal Brahmachary belongs to

Bengali Hindu Bengali Hindus () are adherents of Hinduism who ethnically, linguistically and genealogically identify as Bengalis. They make up the majority in the Indian states of West Bengal, Tripura, Andaman and Nicobar Islands, and Assam's Barak Valley ...

family. He was born in

Dhaka Dhaka ( or ; , ), List of renamed places in Bangladesh, formerly known as Dacca, is the capital city, capital and list of cities and towns in Bangladesh, largest city of Bangladesh. It is one of the list of largest cities, largest and list o ...

Bengal Bengal ( ) is a Historical geography, historical geographical, ethnolinguistic and cultural term referring to a region in the Eastern South Asia, eastern part of the Indian subcontinent at the apex of the Bay of Bengal. The region of Benga ...

British India The provinces of India, earlier presidencies of British India and still earlier, presidency towns, were the administrative divisions of British governance in South Asia. Collectively, they have been called British India. In one form or another ...

(now in

Bangladesh Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world and among the List of countries and dependencies by ...

) in 1932. Professor Brahmachary's early education was in

Calcutta Kolkata, also known as Calcutta (List of renamed places in India#West Bengal, its official name until 2001), is the capital and largest city of the Indian States and union territories of India, state of West Bengal. It lies on the eastern ba ...

Dacca Dhaka ( or ; , ), List of renamed places in Bangladesh, formerly known as Dacca, is the capital city, capital and list of cities and towns in Bangladesh, largest city of Bangladesh. It is one of the list of largest cities, largest and list o ...

and

Hamburg Hamburg (, ; ), officially the Free and Hanseatic City of Hamburg,. is the List of cities in Germany by population, second-largest city in Germany after Berlin and List of cities in the European Union by population within city limits, 7th-lar ...

. He was an astrophysicist. He was a student of the eminent Indian

theoretical physicist Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain, and predict natural phenomena. This is in contrast to experimental physics, which uses experi ...

Satyendra Nath Bose Satyendra Nath Bose (; 1 January 1894 – 4 February 1974) was an Indian theoretical physicist and mathematician. He is best known for his work on quantum mechanics in the early 1920s, in developing the foundation for Bose–Einstein statist ...

. However, since 1960 he moved into biology, making significant original contributions to molecular embryology, and later, since late 1970s became an ecologist, studying mammalian pheromones, at the

Indian Statistical Institute The Indian Statistical Institute (ISI) is a public research university headquartered in Kolkata, India with centers in New Delhi, Bengaluru, Chennai and Tezpur. It was declared an Institute of National Importance by the Government of India und ...

under its founder

Prasanta Chandra Mahalanobis Prasanta Chandra Mahalanobis OBE, FNA, FASc, FRS (29 June 1893 – 28 June 1972) was an Indian scientist and statistician. He is best remembered for the Mahalanobis distance, a statistical measure, and for being one of the members of the fi ...

As a Scientist

Ratan Lal Brahmachary with George Adamson

Following a decade of work on relativistic field theory Astrophysist, Professor Ratan Lal Brahmachary joined

in 1957 and there he was professor of

Biology Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth, History of life, origin, evolution, and ...

Department and a veteran on tiger research. He did his extensive research in Marine Biological Labs in

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

and other institutes in

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

. Professor Brahmachary's early work was on molecular embryology of

invertebrate Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordata, chordate s ...

s, and in the 1970s, during a series of visits to Africa, studied food habits of

mountain Gorilla The mountain gorilla (''Gorilla beringei beringei'') is one of the two subspecies of the eastern gorilla. It is listed as endangered by the IUCN . There are two populations: One is found in the Virunga Mountains, Virunga volcanic mountains of C ...

. For more than 30 years since 1979, his major research emphasis was on pheromones of tigers and other big cats. He was interested in Animal Behaviour long before the subject was introduced in this part of the world. To observe wildlife, he visited

14 times. He also worked in the

Amazon Amazon most often refers to: * Amazon River, in South America * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon (company), an American multinational technology company * Amazons, a tribe of female warriors in Greek myth ...

area and

and in the

Mediterranean The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern ...

and

Andaman Islands The Andaman Islands () are an archipelago, made up of 200 islands, in the northeastern Indian Ocean about southwest off the coasts of Myanmar's Ayeyarwady Region. Together with the Nicobar Islands to their south, the Andamans serve as a mari ...

Notable works

On biochemistry

Tiger pheromones

He was among the first scientists to observe the scent-marking behaviour of tigers, where the animals spray urine on tree branches to mark their territories and communicate via biochemical messengers. Brahmachary, along with Jyotirmoy Dutta of

Bose Institute Bose Institute (or Basu Bigyan Mandir) is a premier public research institute of India for biological sciences and also one of its oldest. The Bose Institute Kolkata is a Tier 1 Natural Science Research Institute in India, sharing the podium wit ...

made the first comprehensive approach towards understanding the nature of big cat pheromones. After Years long researched with Mousumi Poddar Sarkar on Synthesising the chemical nature of tiger urine (marking fluid), he found out that the molecule 2 acetyl-1-pyrroline (2AP) was present in tiger urine (marking fluid) and was the very same molecule that imparts the beautiful aroma to fragrant varieties of

rice Rice is a cereal grain and in its Domestication, domesticated form is the staple food of over half of the world's population, particularly in Asia and Africa. Rice is the seed of the grass species ''Oryza sativa'' (Asian rice)—or, much l ...

basmati Basmati () is a variety of long, slender-grained aromatic rice which originates from the Indian subcontinent, mainly in the regions of Nepal, Punjab, Haryana, Sindh and many other states and provinces of India and Pakistan.

Human pheromone

Professor Brahmachary gave his opinion on human pheromone. In an interview he expressed

Scented and non-scented mung bean

Mung bean The mung bean or green gram (''Vigna radiata'') is a plant species in the legume family.Brief Introduction of Mung Bean. Vigna Radiata Extract Green Mung Bean Extract Powder Phaseolus aureus Roxb Vigna radiata L R Wilczek. MDidea-Extracts P ...

is a widely consumed legume of

as well as of

Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...

. In

, two varieties of this bean, scented and non-scented, are available. The scented variety produces a beautiful aroma when fried, boiled or cooked. Professor Brahmachari researched on this phenomenon with Moumita Pal and Mahua Ghosh. This study was carried out for comparison of the physicochemical and biochemical characteristics of these two varieties.

On physics

Professor Brahmachari did a research on ''"Solution of the Combined Gravitational and Mesic Field Equations in

General Relativity General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the differential geometry, geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of grav ...

"''. Which was published in 1960 in

Progress of Theoretical Physics ''Progress of Theoretical and Experimental Physics'' is a monthly peer-reviewed scientific journal published by Oxford University Press on behalf of the Physical Society of Japan. It was established as ''Progress of Theoretical Physics'' in July ...

Born Free Foundation

He was one of the founder patron of Zoo Check. Now it is the

Born Free Foundation The Born Free Foundation is an international wildlife charity that campaigns to "Keep Wildlife in the Wild". It protects wild animals in their natural habitat, campaigns against the keeping of wild animals in captivity and rescues wild animals i ...

since 1984. Brahmachary always believed that ''"wildlife belongs in the wild and strongly stood for compassionate treatment of animals in research"''. About Born free foundation he told in an interview

Books

He wrote several books in

Bangla Bangla () may refer to: *Bengali language, an eastern Indo-Aryan language *The endonym of Bengal, a geographical and ethno-linguistic region in South Asia *''Bangla-'', a prefix indicating Bangladesh *West Bengal, a state in eastern India, also kn ...

to promote the cause of wildlife protection and scientific observation of animal behaviour. most notable books are listed below. * আফ্রিকার জঙ্গলে বারো বার (Africar Jongoley Barobar) (translation in English ''Twelve Visits to the African Jungle'') * বাঘ সিংহ হাতি (Bagh, Shingha, Haathi) (translation in English ''Tiger, Lion and Elephant'') His academic book ''My Tryst With Big Cats'' is quite popular among tiger studies scholars. Summary of his last work on tiger phenomenon was published in a book named The Neurobiology of Chemical Communication. This book edited by Carl Mucignat Caretta on 2014.

Award

For his contributions to science popularisation, he received the coveted state prize of

West Bengal West Bengal (; Bengali language, Bengali: , , abbr. WB) is a States and union territories of India, state in the East India, eastern portion of India. It is situated along the Bay of Bengal, along with a population of over 91 million inhabi ...

Rabindra Puraskar The Rabindra Puraskar (also Rabindra Smriti Puraskar) is the highest honorary literary award given in the Indian state of West Bengal. This award is named after the famous Indian poet Rabindranath Tagore and is administered by the Government of ...

. He also got

D.Sc. A Doctor of Science (; most commonly abbreviated DSc or ScD) is a science doctorate awarded in a number of countries throughout the world. Africa Algeria and Morocco In Algeria, Morocco, Libya and Tunisia, all universities accredited by the s ...

degree from the

University of Calcutta The University of Calcutta, informally known as Calcutta University (), is a Public university, public State university (India), state university located in Kolkata, Calcutta (Kolkata), West Bengal, India. It has 151 affiliated undergraduate c ...

in 2008.

Notes

References

{{DEFAULTSORT:Brahmachary, Ratan Lal 1932 births 2018 deaths Indian biochemists People from Dhaka University of Calcutta alumni Scientists from Kolkata Recipients of the Padma Shri in science & engineering