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May (4)

Researchers say long-lost Leonardo may have been found

FLORENCE (Reuters) - Art researchers and scientists said on Monday that a high-tech project using tiny video probes has uncovered evidence that a fresco by Renaissance master Leonardo da Vinci lost for five centuries may still exist behind a wall of Florence's city hall.

Researchers work on the "Battle of Angiari" project to find a lost Leonardo da Vinci fresco. Photo credit:Reut

 

"Together with art historians and scientists combining historical evidence and technology, this research team has unlocked a mystery that has been with us for more than 500 years," said Terry Garcia, an executive vice president of the U.S. National Geographic Society, which sponsored the research.

 

The project to find what has come to be known as the "Lost Leonardo" has been controversial, in part because researchers had to drill several holes into an existing work and because not all agree that the Leonardo fresco is still there.

 

At the start of the 16th century, Florence's leaders commissioned Leonardo, then at the height of his career, to paint a massive fresco celebrating the Florentine Republic's victory over the Milanese in a battle on the plains of Anghiari that took place on June 29, 1440.

 

Leonardo, who loathed war as "a most beastly madness," depicted a group of horses and riders furiously fighting.

A banner promotes the "Battle of Angiari" project in Florence. Photo credit: Reuters

He abandoned the project a year after he started, probably because a new experimental technique for frescoes failed. But some of his preparatory studies remain, as well as other artists' copies of the original fresco.

 

All traces of the original were lost more than 50 years later when Giorgio Vasari renovated the great Sala dei Cinquecento in Florence's Palazzo Vecchio and was ordered to paint a new fresco, "The Battle of Marciano," to accommodate the higher walls.

 

Some believe that Vasari was loathe to destroy Leonardo's work, so he built a new wall with an air gap of several centimetres in front of the Leonardo in order to preserve what was left.

 

MEDICAL-STYLE PROBE
Researchers used tiny, medical-style endoscopic probes And other high-tech tools inserted through existing cracks in the outer wall holding the Vasari fresco and took samples of substances.

 

"We found traces of pigments that appear to be those known to have been used exclusively by Leonardo," said Maurizio Seracini, an engineer and expert in art diagnostics who has been on the trail of the "Lost Leonardo" for three decades.

 

"These data are very encouraging," he said, adding that one black pigment found was believed to be of the same type used by Leonardo on the Mona Lisa.

 

A high-tech project uses tiny video probes to find a long-lost Leonardo Da Vinci painting. Photo credit: Reute …

The research work was carried out by the U.S. National Geographic Society, the Center of Interdisciplinary Science for Art, Architecture and Archaeology at the University of California at San Diego and Italian art officials.

 

"I am quite convinced that something has been found and I think this is a historic day," Garcia said in an interview with Reuters at the presentation of the results.

 

"There is overwhelming historic documentation that indicates that the Leonardo was painted, that it was behind the wall and that it was in existence at the time that Vasari painted his fresco," he said.

 

"Then through a series of scientific analysis using state-of-the-art imaging technology we were able to determine that there was a wall in front of the original wall and we confirmed it visually with the endoscope that showed that there is a gap ... and the sample from the wall clearly indicates that there are pigments behind this," he said.

 

 

NEXT STEPS UNCERTAIN
He said it was now up to Italy's culture ministry to decide the next steps and if to explore other parts of the wall.

 

"We can't tell you today the condition of the Leonardo. That is for subsequent research and exploration," Garcia said. "Whatever remains of the Leonardo is behind that wall."

 

But some art historians are sceptical, saying the fresco of Battle of Anghiari was most likely destroyed before Vasari painted his new fresco.

A Leonardo da Vinci fresco may still exist behind a wall in Florence's city hall. Photo credit: Reuters

Some art historians working on the project withdrew their support and Italia Nostra, Italy's leading nature and arts conservation group, asked Florentine authorities to halt it because they said it risked harming the Vasari fresco and because they believed it was unlikely that the original Leonardo was there.

 

Garcia dismissed the criticism. "I think we have demonstrated that those who said the Leonardo was not behind the wall are wrong," he said.

 

"All of the holes that were put into the mural were either in areas that had been previously restored or in fissures, so the original Vasari was not touched," he said.

 

But even some of the participants at the presentation urged caution.

 

"We need further certainties and maximum protection for the Vasari fresco," said Cristina Acidini, arts superintendent for Florence, in response to a question about what the next step would be.

 

"There are pros and cons about every art project," said Marco Chatti, head of the Opificio Delle Pietre Dure, Florence's most prestigious arts restoration laboratory.

 

Florence mayor Matteo Renzi said more work needed to be done on the project to reveal the condition of the Leonardo, which he believes is behind the wall.

 

"I ask the government to authorise us to find out how much (of the Leonardo) is left, in what condition it is in, and to evaluate if we can bring this work of Leonardo back into the light for the whole world," Renzi said.

 

The mayor said he believed that modern technology should allow the public to appreciate both the Leonardo and Vasari.

 

"But if I had to choose, I would choose Leonardo," Renzi said.
(Additional reporting by Silvia Ognibene, editing by Paul Casciato)

Read more…

Researchers say long-lost Leonardo may have been found

FLORENCE (Reuters) - Art researchers and scientists said on Monday that a high-tech project using tiny video probes has uncovered evidence that a fresco by Renaissance master Leonardo da Vinci lost for five centuries may still exist behind a wall of Florence's city hall.

Researchers work on the "Battle of Angiari" project to find a lost Leonardo da Vinci fresco. Photo credit:Reut

 

"Together with art historians and scientists combining historical evidence and technology, this research team has unlocked a mystery that has been with us for more than 500 years," said Terry Garcia, an executive vice president of the U.S. National Geographic Society, which sponsored the research.

 

The project to find what has come to be known as the "Lost Leonardo" has been controversial, in part because researchers had to drill several holes into an existing work and because not all agree that the Leonardo fresco is still there.

 

At the start of the 16th century, Florence's leaders commissioned Leonardo, then at the height of his career, to paint a massive fresco celebrating the Florentine Republic's victory over the Milanese in a battle on the plains of Anghiari that took place on June 29, 1440.

 

Leonardo, who loathed war as "a most beastly madness," depicted a group of horses and riders furiously fighting.

A banner promotes the "Battle of Angiari" project in Florence. Photo credit: Reuters

He abandoned the project a year after he started, probably because a new experimental technique for frescoes failed. But some of his preparatory studies remain, as well as other artists' copies of the original fresco.

 

All traces of the original were lost more than 50 years later when Giorgio Vasari renovated the great Sala dei Cinquecento in Florence's Palazzo Vecchio and was ordered to paint a new fresco, "The Battle of Marciano," to accommodate the higher walls.

 

Some believe that Vasari was loathe to destroy Leonardo's work, so he built a new wall with an air gap of several centimetres in front of the Leonardo in order to preserve what was left.

 

MEDICAL-STYLE PROBE
Researchers used tiny, medical-style endoscopic probes And other high-tech tools inserted through existing cracks in the outer wall holding the Vasari fresco and took samples of substances.

 

"We found traces of pigments that appear to be those known to have been used exclusively by Leonardo," said Maurizio Seracini, an engineer and expert in art diagnostics who has been on the trail of the "Lost Leonardo" for three decades.

 

"These data are very encouraging," he said, adding that one black pigment found was believed to be of the same type used by Leonardo on the Mona Lisa.

 

A high-tech project uses tiny video probes to find a long-lost Leonardo Da Vinci painting. Photo credit: Reute …

The research work was carried out by the U.S. National Geographic Society, the Center of Interdisciplinary Science for Art, Architecture and Archaeology at the University of California at San Diego and Italian art officials.

 

"I am quite convinced that something has been found and I think this is a historic day," Garcia said in an interview with Reuters at the presentation of the results.

 

"There is overwhelming historic documentation that indicates that the Leonardo was painted, that it was behind the wall and that it was in existence at the time that Vasari painted his fresco," he said.

 

"Then through a series of scientific analysis using state-of-the-art imaging technology we were able to determine that there was a wall in front of the original wall and we confirmed it visually with the endoscope that showed that there is a gap ... and the sample from the wall clearly indicates that there are pigments behind this," he said.

 

 

NEXT STEPS UNCERTAIN
He said it was now up to Italy's culture ministry to decide the next steps and if to explore other parts of the wall.

 

"We can't tell you today the condition of the Leonardo. That is for subsequent research and exploration," Garcia said. "Whatever remains of the Leonardo is behind that wall."

 

But some art historians are sceptical, saying the fresco of Battle of Anghiari was most likely destroyed before Vasari painted his new fresco.

A Leonardo da Vinci fresco may still exist behind a wall in Florence's city hall. Photo credit: Reuters

Some art historians working on the project withdrew their support and Italia Nostra, Italy's leading nature and arts conservation group, asked Florentine authorities to halt it because they said it risked harming the Vasari fresco and because they believed it was unlikely that the original Leonardo was there.

 

Garcia dismissed the criticism. "I think we have demonstrated that those who said the Leonardo was not behind the wall are wrong," he said.

 

"All of the holes that were put into the mural were either in areas that had been previously restored or in fissures, so the original Vasari was not touched," he said.

 

But even some of the participants at the presentation urged caution.

 

"We need further certainties and maximum protection for the Vasari fresco," said Cristina Acidini, arts superintendent for Florence, in response to a question about what the next step would be.

 

"There are pros and cons about every art project," said Marco Chatti, head of the Opificio Delle Pietre Dure, Florence's most prestigious arts restoration laboratory.

 

Florence mayor Matteo Renzi said more work needed to be done on the project to reveal the condition of the Leonardo, which he believes is behind the wall.

 

"I ask the government to authorise us to find out how much (of the Leonardo) is left, in what condition it is in, and to evaluate if we can bring this work of Leonardo back into the light for the whole world," Renzi said.

 

The mayor said he believed that modern technology should allow the public to appreciate both the Leonardo and Vasari.

 

"But if I had to choose, I would choose Leonardo," Renzi said.
(Additional reporting by Silvia Ognibene, editing by Paul Casciato)

Read more…

Why putting ice on injuries may slow healing

Why putting ice on injuries may slow healing
Inflammation helps repair the damage


© Mark Herreid - Fotolia.com






Putting ice - or a pack of frozen peas - on an injury to reduce swelling may not be such a good idea after all, as scientists say that inflammation is an essential part of the healing process.


The discovery, published in the FASEB Journal, turns conventional wisdom - which says that inflammation must be controlled to promote healing - on its head.


Researchers say the findings could lead to new treatments for muscle injury caused by trauma, chemicals, infections, freeze damage, and medications, which cause muscle damage as a side effect.


Researcher Lan Zhou, from the Neuroinflammtion Reserch Centre at the Cleveland Clinic, said: "We hope that our findings stimulate further research to dissect different roles played by tissue inflammation in clinical settings, so we can utilise the positive effects and control the negative effects of tissue inflammation."


During acute muscle injury, researchers discovered that inflammatory cells produce high levels of insulin-like growth factor (IGF-1), which significantly increases the rate of muscle regeneration.


In the study, they compared how two groups of mice responded to acute muscle injury. The first group of mice were genetically altered so they could not make an inflammatory response to injury and the second group consisted of normal unaltered mice.


All mice were injected with barium chloride to cause muscle injury. The genetically altered mice which could not make an inflammatory response did not heal, but the second group of normal mice repaired the injury.


Further investigations showed the inflammatory cells within the injured muscle tissue produced a high level of IGF-1.


Gerald Weissmann, editor in chief of the FASEB Journal, said: "For wounds to heal we need controlled inflammation, not too much, and not too little.


"It's been known for a long time that excess anti-inflammatory medication, such as cortisone, slows wound healing. This study goes a long way to telling us why: insulin-like growth factor and other materials released by inflammatory cells helps wound to heal."

Read more…

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