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Tag: "deposits" at biology news

Bone and cartilage growth to blame for heart valve disease

...the mitral valves was part of the aging process as deposits of calcium, a mineral found in the blood, built up on the valves. Therefore, research has never focused on preventing the problem," says Dr. Rajamannan. "Currently the only option is to surgically repair or replace the damaged valves. Our findings...

Insects and mammals share common fat-building pathway, study suggests

...where, he said. If fat formation is blocked, lipid deposits may instead build in other parts of the body, such as muscle or liver. "The 'problem' in obesity is energy balance that is out of whack, and not a surfeit of adipocytes (fat cells) per se." Regardless of the study's therapeutic implications, the fin...

Students discover 11,000 year old remains of Irish Elk

... with students to demonstrate the structure of the deposits in the cliffs, we only see sediments such as gravels, sands, muds and peats. "I just scraped the surface of the fallen cliff section ?which was in a block that had recently slid down the cliff ?and uncovered an orange streak which turned out to be ...

Researchers show how air pollution can cause heart disease

...rteries 19.2 percent filled with plaque, the fatty deposits that clog arteries. The arteries of those breathin...e cells that are an important ingredient in plaque deposits and also active participants in a biochemical pathway related to inflammation. The study revealed se...

Did feathered dinosaurs exist?

...her evolution and ancestral birds, even though the deposits are at least 25 million years younger than those containing the earliest known bird Archaeopteryx. Researchers, led by Alan Feduccia of the University of North Carolina at Chapel Hill, considered the new findings in the context of the existing lite...

NJIT study shows nanoparticles could damage plant life

...real world, said Watts. "But we speculate that air deposits of nanoparticles or water transport of them are ways in which nanoparticles could mix with plant life," he said. ...

Does manganese inhaled from the shower represent a public health threat?

...times higher than doses that resulted in manganese deposits in the brains of rats. Adults would be exposed to doses 50 percent higher than the rodents. The researchers said that while limitations to their calculations do exist, regulatory agencies have not considered this potential pathway when setting drink...

Naturally occurring asbestos linked to lung cancer

...hown a significant association between living near deposits of naturally occurring asbestos and mesothelioma. This is the strongest evidence possible without conducting one-on-one interviews with each diagnosed mesothelioma patient or his or her family." Laurel Beckett, professor and vice chair of the UC Dav...

Study casts doubt on 'Snowball Earth' theory

...ocused on a drill core of little-known black shale deposits from southeastern Brazil and applied lipid biomarker techniques to identify prehistoric organisms based on the fatty remains of their cell membranes. The team, which included scientists from USC, Caltech, the University of Maryland and a Brazilian m...

Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils

...described by Professor Taylor were from non-marine deposits about 400 million years old, when plants began to massively colonize the land. But did cyanobacteria or other algae form similar relationships with fungi in the marine environment, perhaps long before the evolution of land plants?" Present-day examp...

Columbia study shows widely used artery clearing device does not help patients during heart attack

... protection. During angioplasty procedures, fatty deposits in the arteries can be dislodged and clog arteries further downstream. Distal protection devices use a specialized guidewire and catheter to collect and remove this debris. The study evaluated the efficacy of distal protection devices using several ...

Hydrogen and methane provide raw energy for life at 'Lost City'

...t least 100 feet. Some places resemble the sort of deposits one might see in spectacular caves with spires and smoothly rippled surfaces in a complex three-dimensional array, says Duke University's Jeffrey Karson, co-author on the paper. Another marked difference being published for the first time this week ...

To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

... their sperm in a competitive frenzy as the female deposits her eggs. And the tiny male has avoided the harrowing journey taken by most salmon to the ocean and back, bypassing hazards such as dams, sharks and fishermen. "In some species, all or a fraction of the individuals in some populations do not migrat...

Nano-bumps could help repair clogged blood vessels

...during or after surgery to remove dangerous plaque deposits from the vessels. The stents, which are made of ti...es to grow new tissue after vessel-clogging plaque deposits have been removed. A major problem, however, is that the body often perceives the metal devices as f...

Small species back-up giant marsupial climate change extinction claim

...ular significance because the Darling Downs fossil deposits are among the youngest Australian megafauna deposits - laid down on the cusp of the extinction event. PhD researcher Gilbert Price, of QUT's School of N...

Molecule that usually protects infection-fighting cells may cause plaque deposits inside arteries

... AIM function, there was marked presence of plaque deposits in the arteries following a diet of high-fat food. "This was dramatic evidence that showed suppressing AIM function translates into prevention of atherosclerosis," Dr. Miyazaki said. Atherosclerosis, known as "hardening of the arteries," occurs whe...

Live fast, die young true for forests too

...like a bank account," said Stephenson. "As long as deposits and withdrawals are similar, your balance remains stable. But if the deposits or withdrawals are disrupted, the balance changes." In productive forests, such as tropical forests...

Surprising findings reported about iron overload

...y ?can permit the progressive accumulation of iron deposits in target organs that may result in complications such as cirrhosis of the liver, liver cancer, arthritis, diabetes, impotence and heart failure. "The finding that Asians and Pacific Islanders have high levels of iron in the blood is surprising beca...

LUCA technologies confirms real-time methane generation

...re microbial conversion of underground hydrocarbon deposits (oil, oil shales, and coal) to methane is ongoing.... generally accepted that many of the known methane deposits were produced by such organisms, most of this production was thought to have occurred millions of ye...

Scientists find fossil proof of Egypt's ancient climate

...ay. The snails were preserved in calcium carbonate deposits throughout the lake. "We're using the chemistry of the water over the course of a year or two, as revealed by isotopic analyses and minor element analyses of the snail shells to determine information about the climate then," Kieniewicz said. "The sh...

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