IIT-M makes white light from pomegranate, turmeric extracts

Honoured Dr Vikram Singh's work has been recognised with the BIRAC Gandhian Young Technological Innovation award.
Honoured Dr Vikram Singh’s work has been recognised with the BIRAC Gandhian Young Technological Innovation award.

This could be used in applications such as tunable laser, LEDs and white light display

Dr. Vikram Singh, former research scholar in the Department of Chemistry, IIT Madras won the BIRAC Gandhian Young Technological Innovation (GYTI) Award 2017 for his work on producing white light emission using natural extracts.

Dr. Singh and Prof. Ashok Mishra from the Department of Chemistry, IIT Madras used a mixture of two natural extracts — red pomegranate and turmeric — to produce white light emission. The researchers used a simple and environment-friendly procedure to extract dyes from pomegranate and turmeric.

While polyphenols and anthocyanins present in red pomegranate emit at blue and orange-red regions of the wavelength respectively, curcumin from turmeric emit at the green region of the wavelength. White light emission is produced when red, blue and green mix together. This is probably the first time white light emission has been generated using low-cost, edible natural dyes. The results were published in the journal Scientific Reports.

“We had to mix the two extracts in a particular ratio to get white light,” says Dr. Singh, the first author of the paper; he is currently at Lucknow’s CSIR-Central Drug Research Institute (CDRI). By changing the concentration of the two extracts the researchers were able to get different colour temperature (tunability).

“When we mix the two extracts and irradiate it with UV radiation at 380 nm, we observed energy transfer (FRET mechanism) taking place from polyphenols to curcumin to anthocyanins, which helps to get perfect white light emission,” says Dr. Singh. For FRET mechanism to take place there must be spectral overlap between the donor and acceptor.

Energy transfer

In this case, there is a perfect overlap of emission of polyphenols with absorption by curcumin so the energy from polyphenols is transferred to curcumin. Since there is also a perfect overlap of emission of curcumin with absorption by anthocyanin, the energy of curcumin is transferred to anthocyanin.

As a result of this energy transfer from one dye to the other, when the extract is irradiated with UV light at 380 nm (blue region of the wavelength), the polyphenols emit in the blue region of the wavelength and transfers its energy to curcumin. The excited curcumin emits in the green region of the wavelength and transfers its energy to anthocyanin, which emits light in the red region of the wavelength.

“Because of the energy transfer, even if you excite in the blue wavelength we were able to get appropriate intensity distribution across the visual wavelength,” says Prof. Mishra, who is the corresponding author of the paper.

Without turmeric

Taking the work further, the duo produced carbon nanoparticles using pomegranate and to their surprise it was producing fairly green emission. So instead of using turmeric to get green wavelength, the researchers used carbon nanoparticles made from pomegranate extract. “We could get white emission, though it is not as white as when we use turmeric. It’s slightly bluish but well within the white zone,” says Prof. Mishra. “It is an attractive to use a single plant source to create white light emission.” The principle by which the pomegranate extract and carbon nanoparticles made from the extract is the same as in the case when pomegranate and turmeric extracts were used. The results were published in the Journal of Materials Chemistry C.

Though this natural mixture of dyes can be used in a wide variety of applications such as tunable laser, LEDs, white light display, much work needs to be done in terms of photostability and chemical stability before it becomes ready for translation. Biosystems have an inherent tendency to breakdown and so this has to be addressed.

source: http://www.thehindu.com / The Hindu / Home> Sci-Tech> Science / by R. Prasad / May 06th, 2017

18th century Maratha-style Thanjavur choultry on verge of collapse

Chennai :

An 18th century chatram (choultry) in Thanjavur is now in ruins due to lack of maintenance and care. The Yamunambaal chatram , built by Maratha King Pratap Sinha (1739-1763) in Needamangalam, 30 km from Thanjavur, may collapse anytime if sufficient care is not taken immediately. Despite repeated requests from activists, the government has not taken any steps to preserve this architecturally-rich building.

A couple of months ago, historian and archaeologist Ayyampettai N Selvaraj had filed an RTI petition to revive the historic importance of the building, but he didn’t get a proper answer from the concerned authority. “As this is a charity, we can’t give you the details you want,” was the reply from the collector’s office. The chatrams, introduced by Maratha kings, played a major role in accommodating people from other parts of India visiting Rameswaram, during their reign from 1674 to 1855. The chatram and village were named after the king’s wife, Yamunamba Bhai. The village was known as Yamunambal Puram and the choultry, Yamunambal Chatram. “The king constructed a palatial chatram and a lake here. He also raised temples for Shiva and Vishnu along with an Agraharam for the temple priests and supervisors,” he said.

“When the Marathas ruled Thanjavur, they introduced charitable institutions, which were quite new and novel to this soil. Those days, pilgrims from the northern parts of India would reach Rameshwaram on foot, with carts, and it was difficult to meet out their basic needs in an alien soil. The Maratha rulers could understand the hardships the pilgrims faced and built at least 20 chatrams with a tank in Thanjavur alone,” said Selvaraj, who has excavated many ancient idols in and around Thanjavur.

These chatrams were designed and constructed in the Maratha style. The main mandapam of the Yamunambaal chatram is designed as if it was pulled by horses and elephants with mahouts on their back with swords in hands. Granites were used in the construction, up to the basement. “The chatram may collapse any time. It’s now under the Thanjavur Collector’s jurisdiction. It’s high time action is taken to maintain the building,” he said.

source: http://www.timesofindia.indiatimes.com / The Times of India / News> City News> Chennai News / by M T Saju / TNN / May 05th, 2017

Ilayaraja dedicates library building in Tiruchuli

Virudhunagar Collector A. Sivagnanam and music composer Ilayaraja at the branch library at Tiruchuli.
Virudhunagar Collector A. Sivagnanam and music composer Ilayaraja at the branch library at Tiruchuli.

Education was important to create a knowledge-based society, says the music maestro

A new branch library building, sponsored by Sri Ramanasramam in Tiruvannamalai, was dedicated at Tiruchuli on Tuesday.

Music maestro Ilayaraja and Collector A. Sivagnanam lit the traditional lamp to mark the inauguration of the building constructed at a cost of ₹41 lakh.

Speaking on the occasion, Mr. Ilayaraja said education was important to create a knowledge-based society. Libraries were the kind of institutions meant for continuous education of the masses, he said, adding children from rural areas should come forward to make the best use of the variety of books available in the library.

They should become top civil servants, scholars and scientists to serve the nation, he said.

District Library Officer S. Jegadeesan said various e-resources links would be made available in the library, established in two floors with computer and internet facilities, for the students to prepare for various courses and competitive examinations.

source: http://www.thehindu.com / The Hindu / Home> News> States> Tamil Nadu / by / Special Correspondent / Aruppukottai – May 02nd, 2017

Avvaiyar Award for Padma Venkataraman

PadmaCF03may2017

Chennai :

Chief Minister Edappadi K Palaniswami on Tuesday presented Avvaiyar award for 2017 to Padma Venkataraman, chairperson, Women’s Indian Association (WIA) and daughter of former President R Venkataraman.

The award which has been instituted to encourage women excel in social reforms, women’s development, communal harmony, arts, science, culture, journalism and administration, carries `1 lakh, a gold medal and a citation. She was chosen for the award in appreciation of her services to rehabilitation of the leprosy-affected for over 30 years.

Thanking the Chief Minister, Padma Venkatraman recalled the services of WIA to the leprosy-affected and its work with the State government covering all 10 government-run homes, colonies and the community-based people.

She said the award would strengthen WIA’s resolve to service society further.

She lived for many years in Vienna, Austria, where she was, among other positions she held, a permanent representative of All India Women’s Conference to the UN, member of several non-profit panels accredited to the UN, such as Committee on Narcotics and  Committee on Disabled. She was also vice-president of a non-profit organisation, Committee on Women and president, United Nations Women’s Guild.

source: http://www.newindianexpress.com / The New Indian Express / Home> States> Tamil Nadu / by Express News Service / May 03rd, 2017

Jazz maestro Frank Dubier no more

FrankDubierCF02may2017

He had worked with M.S.V., Ilaiyaraaja

Frank Dubier, the legendary jazz trumpeter, who also mastered the clarinet, flute, violin and saxophone and worked with music directors including Ilayaraja and M.S. Viswanathan as solo trumpet player, died in Bengaluru on Tuesday. He was 87.

Stephen Lazarus, his friend and a gospel trumpeter recollected, “He was always fun to to be with and an extremely talented jazz trumpeter. If my memory is right, we played for Enna di Meenatchi song in the film Ilamai Oonjal Aadukirathu, among many others. He was one of those few jovial and down-to-earth musicians I have known.”

Born in Madras in 1929, Dubier developed love for music as he watched his mother Beatrice play the piano. In an interview to The Hindu in 2002, Dubier said, “As a seven-year-old, I began playing with my three-member family band, with my father on the violin, mother at the piano and me with the trumpet, saxophones and all types of horn.”

Much later, he also told why he took to the trumpet over the other instruments. “It was a choice between the clarinet and the trumpet. I settled for the latter, because clarinet was going out of vogue and was more expensive. I was to play with a trumpet made in Meerut,” he told The Hindu.

Harry MacLure, his nephew and editor of the magazine Anglos in the Wind said, Dubier played during his teens for the Madras Governor’s Band and then at the Navy for four years before beginning to play for M. S. Viswanthan and then Ilayaraja. He had a great respect for Ilayaraja, he said.

“He considered him a genius. When he was playing for Ilayaraja, they had a great association but eventually with time, they lost touch,” Mr. MacLure said.

Dubier is survived by four children.

Three years back, in an interview to The Hindu, speaking of how jazz has been neglected in the city, on a sad note, he said, “Jazz is dead.”

source: http://www.thehindu.com / The Hindu / Home> News> States> Tamil Nadu / by Staff Reporter / Chennai – April 29th, 2017

Who was Quaid-E-Millat?

That was a question I was recently asked in connection with a reference I had made to Umda Bagh and its links with education in the city for nearly 125 years. Good question, and off I went ahunting for information.

Into the Umda Bagh campus moved c.1895 the Madrasa-I-Azam, the chief Muslim school in the South and which was established in 1849. This developed partially into a Government Muhammadan College with its own buildings in 1934.

In 1948, the College was reconstituted as the Government Arts College for Men. The College moved to Nandanam in 1972 and a women’s college opened in its stead in 1974. This was named the Quaid-E-Millat Government College for Women, leaving many a student puzzling over the prefixed name, which I’m told means ‘Leader of the Nation’.

A Tirunelveli Rowther, Mohammed Ismail went into business in the 1920s and became a leader in the worlds of leather and Madras commerce. That leadership led him into politics, in which he had shown interest from when, as a 13-year-old, he started in 1909 the Young Muslim Society in Tirunelveli.

Nine years later, he founded the Council of Islamic Scholars and joined the Indian Muslim League. In 1946, he led the League’s Madras unit in the Assembly elections and became Leader of the Opposition. He was also elected to the first Lok Sabha, which simultaneously served as the Indian Constituent Assembly. And, an intriguing election that year was as the founding President of the Madras State Mutton Dealers’ Association, which he remained till his death 26 years later.

When Pakistan was born in 1947, the Muslim League divided and an Indian Union Muslim League came into being. Mohammed Ismail was elected its first President. After serving in the Rajya Sabha from 1952 to 1958, he moved into Kerala politics with States’ Reorganisation in 1956. Leading the IUML, he won Lok Sabha seats in 1962, 1967 and 1971. He died a year after his last election, revered in both Tamil Nadu and Kerala as the Quaid-E-Millat, a leader who ensured communal harmony. Interestingly, his education had been in Hindu, Catholic and Protestant schools and colleges!

Perhaps the greatest tribute paid to him was by Congress Chief Minister M Bhaktavatsalam who, describing his dignified and conciliatory behaviour in the Legislature, said he was “a model for all Opposition leaders”.

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When the postman knocked…

V Mahalingam writes (Miscellany, April 17): “N Kannayiram went to the West Indies as a replacement for G Kasturirangan of Mysore who cried off because of groin injury and not as replacement for CD Gopinath.

Also CDG didn’t opt out as he was not happy with the cricket board’s ways. He pulled out as he was suffering from collar bone injuries and he was replaced by L Adisesh of Mysore who also pulled out. Totally there were four replacements before the tour.”

With this column’s word length now abbreviated, I don’t have the luxury of elaboration. But even then, there was no reason to link two entirely different sentences about Kannayiram and Gopinath except for the fact that they were adjacent to each other. Juxtaposition is not the equivalent of replacement! More interesting is my correspondent saying it was “collarbone injuries” that made Gopinath skip the tour.

Reporting a long interview with Gopinath for the book Office Chai, Planter’s Brew — Gopinath approving every word of the final text — this writer stated: “(In 1952) Gopinath, being South Indian, was ‘rather strangely called Madrasi in a rather contemptuous way’ by other members of the team. This was an era when cricket essentially meant Bombay — and in Gopinath’s words, ‘…it was almost as if, if you came from Madras, you had no business to play cricket…’ He goes on that around then Gordon Woodroffe’s offered him a job — it was a time when the first Indians were being recruited by British firms — and he was mulling over it because he felt the remuneration was inadequate given his academic and sporting record.

But his father, an old Imperial Bank hand, pointed out he’d get fair treatment in a British firm and could go far (he did; he became its first Indian Chairman). The interview then records, “Musing on the advice and his issues with (Indian) cricket, Gopinath decided to refuse the West Indian tour.” No mention of collar bone injuries anywhere.

Subash Chandra Bose at the Tea hosted for him at the Beehive Foundry, Madras on September 3,1939. To his right is K S Rao, owner of the Beehive Group, and third from right (seated) a mystery man only recently identified by the owner of this picture. Standing is C. Audikesavalu Chettiar, Rao’s partner.
Subash Chandra Bose at the Tea hosted for him at the Beehive Foundry, Madras on September 3,1939. To his right is K S Rao, owner of the Beehive Group, and third from right (seated) a mystery man only recently identified by the owner of this picture. Standing is C. Audikesavalu Chettiar, Rao’s partner.

Ramesh Kumar, who’s kept the Beehive Foundry name going in its original Oakes & Co. premises on Popham’s Broadway (Miscellany, June 2, 2014), now Prakasam Salai, sends me today’s picture of yesteryear. It’s of Subhas Chandra Bose being hosted at tea at the Beehive premises on September 3, 1939. With him are Kowtha Suryanarayana Rao, the founder of the group that owns the premises, and his partner C Audikesavalu Chettiar, Ramesh Kumar’s grandfather. To Rao’s right is a person whom I wonder how many recognise, despite his being a well-known name in Tamil Nadu. He is Pasumpon Muthuramalinga Thevar.

Rao founded the Swadharma Swaarajya Sangh (Orthodox National League) in 1913 for the “revival of the declining spiritual and cultural values of Bharateeya life, dharma and religion”, I wonder how much Bose or Thevar had in common with it? I also wonder, given the date of the felicitation, whether Bose fled to Germany from Madras; that was the day India was dragged into a World War.

The chronicler of Madras that is Chennai tells stories of people, places and events from the years gone by and, sometimes, from today

source: http://www.thehindu.com / The Hindu / Home> Society> History & Culture / Madras Miscellany / by S. Muthiah / May 01st, 2017