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Tag: "sudden" at biology news

Ancient DNA traces the woolly mammoth's disappearance

...cies, a picture is emerging of extinction not as a sudden event at the end of the last ice age, but as a piecemeal process over tens of thousands of years involving progressive loss of genetic diversity,” said Dr. Ian Barnes, of Royal Holloway, University of London. “For the mammoth, this seems much more li...

'Virtual autopsy' helps identify drowning as cause of death

... and a control group of 12 men who were victims of sudden death from coronary artery disease. Following MDCT, routine autopsies were performed. MDCT images were evaluated for the presence of fluid and sediment in the paranasal sinuses and airways, fluid in the ear, frothy fluid in the airways, obscured "...

WHO data confirms low level of resistance to Tamiflu

...contagious viral illness and is characterised by a sudden onset of debilitating clinical symptoms which affect the entire body. Up to 500 million people are infected by influenza and up to 500,000 deaths are attributed to influenza each year. Influenza complications occur in all patient groups and include ...

Latent memory of cells comes to life

...erations. Sometimes however, dramatic and very sudden changes are observed in one individual in the abse...ossible clarification. ”The explanation for the sudden changes is that it is not the DNA itself that is altered - it is its immediate surroundings that cha...

Glucose triggers brain cell death in rats after hypoglycemic coma

...chers have identified the cause of the damage: the sudden return of glucose to the brain activates the enzyme NADPH oxidase, which in turn initiates a process of oxidative stress that is fatal to neurons. Oxidative stress occurs when cells are poisoned by highly reactive forms of oxygen. Previously, it ...

'Marathon mice' elucidate little-known muscle type

...ergy into motion and force, ranging from rapid and sudden bursts of intense activity to continuous low-inten...tch" fibers (type IIB), better suited to rapid and sudden activity of shorter duration. The fiber types are defined by which "myosin heavy chains" (MHCs) they...

How trees manage water in arid environments

...n water is scarce, and then quickly respond to the sudden availability of water at the onset of the monsoon in July. As unlikely as it may seem, Arizona does experience a monsoon every summer. Certain roads have yellow warning signs posted -- "Do Not Cross When Flooded." Though these signs may seem out o...

Are one-third of costly implanted heart devices unnecessary? New study suggests yes

...ged hearts back into rhythm and save patients from sudden cardiac death, which kills 300,000 Americans each ...to implant a device, without raising their risk of sudden death. That would mean that Medicare could be spared the additional $90,000 lifetime cost of each de...

New mechanism for nutrient uptake discovered

.... "Imagine a large animal marking its territory. A sudden flow of ammonia could be toxic to the plant. If it weren't for a rapid-fire shutdown plants could die. The conservation of this feature in the related transporters in bacteria, fungi, plants, and animals suggests that an ancient organism, which was a...

New study may show how to forestall a fatal, virus-caused immune-system meltdown

...dangerous element of the disease. All too often, a sudden immune overreaction sends the infected person into a shock-like state from which he or she may never recover. Now, researchers at the University of Texas Medical Branch at Galveston (UTMB) believe they’ve found a way to spot the biochemical profil...

New research shows that flu is a trigger of heart attacks

... quiescent, stable atherosclerotic plaques undergo sudden changes, mainly due to exaggerated inflammation, leading to rupture of these vulnerable plaques and subsequent formation of clots resulting in heart attacks. "This study shows that flu is an important trigger of heart attacks because flu is a sev...

How fish conquered the ocean

...e teleost species took place as evidenced by their sudden appearance in the fossil records of marine sediments. The basis for this successful radiation is unexplained and has intrigued biologists for many years", says Dr. Finn and adds, "Our paper in PLoS ONE relates to the molecular solutions evolved among...

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

...n earth now, began to radiate around the time of a sudden increase in the temperature of the planet ?ten million years after the death of the dinosaurs. Professor Andy Purvis from Imperial College London's Division of Biology explains: "Our research has shown that for the first 10 or 15 million years af...

A potential biological cause for sudden infant death syndrome

...topsy data provide the strongest evidence yet that sudden infant death syndrome (SIDS) is not a "mystery" disease but has a concrete biological basis. In the November 1 issue of JAMA, researchers at Children's Hospital Boston document abnormalities in the brainstem ?a part of the brain that regulates breath...

Genome info from 'plant destroyers' could save trees, beans and chocolate

...each year. Phytophthora ramorum is associated with sudden oak death, a disease that has devastated the nursery industry and oak ecosystems in California, Oregon and Washington.More than 1 million native oak and tanoak trees have been lost to the disease. In addition to soybean and oak, Phytophthora species...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

...n. This has obvious benefits when dealing with the sudden outbreak of a major epidemic, as one would not need to know the exact make up of the new strain before deploying the protecting virus making it much more useful than vaccines, which are effective only against particular existing strains of virus. I...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...odson revisited his projections to account for the sudden increase of dinosaur fossil discoveries during the 1990s."The 1990s saw an 85% increase in the number of new fossil discoveries," Dodson said. "The dinosaur field used to be the pursuit of white Anglo-Saxons, but, with recent explosion in of dinosau...

Reef warns of sea level rise

... 4 metres of sea level rise. " The cause of the sudden global warming leading to the end of the ice-ages is thought to be due to changes in the elliptical nature of the Earth's orbit combining with other factors, such as variations in its tilt or wobble. During the ice ages atmospheric CO2 was around 18...

Stroke symptoms common among general population

... had a stroke and whether they had experienced the sudden onset of any of six stroke symptoms. Brief physic...oke symptoms. Eight and one-half percent reported sudden numbness on one side of the body; 5.8 percent sudden weakness on one side of the body; 4.6 percent s...

Finding an answer to Darwin's Dilemma

The sudden appearance of large animal fossils more than 500 million years ago ?a problem that perplexed even Charles Darwin and is commonly known as "Darwin’s Dilemma" ?may be due to a huge increase of oxygen in the world’s oceans, says Queen’s paleontologist G...

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