Powerful x-rays reveal what is eating the wreckage of Henry VIII’s favorite warship, Mary Rose. After the ship sank in the 1545 battle with France, sulfur-producing marine bacteria devoured the wood of the shipwreck, which was submerged for the next few centuries, and turned into acid when exposed to the air, historic today. Left behind a residue that could harm a wreck. Researchers have recently discovered.
Mary Rose (remaining) was debilitated at the bottom of the English Channel until the ship was lifted in 1982, and parents took steps to treat and preserve the flooded structures, Bacterial Whether wood-dwelling species and their by-products can jeopardize the preservation of rescued vessels.
By combining X-ray With technology to compare atom Scientists have detected nanoparticles in the molecules of ship’s wood that form acids, a by-product of destructive bacteria. Identifying and locating acid-forming compounds that can erode ships helps conservator-restors protect this unique artifact.
With this new method, “Mary Rosewood can not only image and identify these nanoparticles, but also evaluate their structure,” said the lead author of the study, Dean of Materials Science and Engineering at the University of Sheffield. Says Serena Kussen. England.
“This is the first time zinc Nanostructures of sulfide (a by-product of bacteria) were observed in Mary Rosewood, “Kussen said in a statement.
When Henry VIII ordered the construction of Mary Rose in 1510, he was only 19 years old and took the throne a year ago. At that time, Mary Rose was a “state-of-the-art” warship with up to eight large guns and a weight of about 600 tons (544 metric tons). According to Mary Rose Trust According to the Trust, Mary Rose sailed in two wars in Portsmouth, England, before capsizing during a battle with the French fleet, and sank to the seabed with about 500 crew members.
Divers discovered Mary Rose in 1971 in Sorrento, a strait between the United Kingdom and the Isle of Wight (an island in the English Channel, a county in the United Kingdom). And over the next decade, more than 500 divers and researchers helped excavate the ship, removing individual relics one at a time. Then, in 1982, a team of experts lifted the hull, about half of which was still intact. Scientists say in a new study, water-saturated wood was treated with polyethylene glycol (PEG), a compound that stabilizes wood and prevents it from shrinking as it dries.
However, even after treatment, flooded wood can be prone to deterioration.many sulfurStudies have shown that bacteria that produce bacteria may still be lurking in wood, and PEG decomposes over time, which can also produce harmful acids.
“There are potentially tonnages of sulfur-containing species and PEG degradation products on Mary Rose’s hull, highlighting the magnitude of this problem,” the authors report.
They sampled a 2-inch (5 cm) long tree core from Mary Rose’s hull and finely sliced the sample for analysis with X-rays and a scanning electron microscope (SEM). Scientists compare scattering patterns of data based on the atomic structure of compounds in wood and detect iron sulfide-based nanostructures that are produced by bacteria and can form harmful acids when interacting with oxygen. I was able to do.
“Our result is to warn restorers of these previously unknown deposits and expand research into materials that induce deterioration,” Cussen said in a statement. “Knowing the structure of these potentially harmful species can also design targeted therapies for future elimination.”
The findings were published in the journal on October 27th. Matter..
Originally published in Live Science.
Henry VIII’s favorite ship had a bacterial problem, and scientists have now identified the culprit.
Source link Henry VIII’s favorite ship had a bacterial problem, and scientists have now identified the culprit.