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Tag: "history" at biology news

UCI scientists reconstruct migration of avian flu virus

...ata of the H5N1 avian flu virus to reconstruct its history over the past decade. They found that multiple strains of the virus originated in the Chinese province of Guangdong, and they identified many of the migration routes through which the strains spread regionally and internationally. By knowing where H...

Researchers identify gene involved in dog size

...e small size trait emerged relatively early in the history of domestic dogs. They hypothesize that small size may have facilitated the rapid diversification among domestic dog breeds by making it easier for humans to maintain them in the crowded confines of developing villages and cities, as well as making t...

New compound prevents alcoholic behavior, relapse in animals by blocking stress response

...omes overactive in the long term in animals with a history of alcohol dependence, increasing the risk for relapse. Heilig and his team showed that MTIP blocked the activity of CRF in stressful situations without affecting its activity under ordinary circumstances. They studied rats that had been put thro...

Cocoa 'vitamin' health benefits could outshine penicillin

...y are among the most important observations in the history of medicine,' Hollenberg says. ‘We all agree that penicillin and anaesthesia are enormously important. But epicatechin could potentially get rid of 4 of the 5 most common diseases in the western world, how important does that make epicatechin?... I w...

Smell may outlast other senses

...those who do not smoke, take medications or have a history of nasal problems such as sinusitis. However t...parent in smokers, people on medications or with a history of nasal problems. ...

Indicators for risk of heart disease are higher in passive smokers

...estricting analysis to those 70 or younger with no history of heart attack, heart failure or stroke also made lifwttle difference in the association. Dr Venn said: "Our study shows that very low levels of exposure to second-hand smoke may be associated with appreciable increases in cardiovascular risk. Wh...

Fighting to keep Darwin in the classroom

...ttle to keep religiously based explanations of the history of life—especially human life—out of the science curriculum continues unabated. And though a number of educational institutions and organizations have had notable success in combating intelligent design in the classroom, what is needed now is a fres...

Elucidation of the genome for diabetics with DNA chips

...n-obese patients with type 2 diabetes and a family history of the disease was compared with DNA from 669 non-diabetic subjects from the DESIR study, a prospective study run by INSERM and directed by Beverly Balkau. The key results of this first screening were then confirmed in more than 5500 French diabetic ...

Breakthrough in understanding type-2 diabetes as key genes identified

...up of 700 people with type-2 diabetes and a family history of the condition, with 700 controls. They looked a...,000 individuals with type-2 diabetes and a family history of the disorder, to verify that the same genetic mutations were visible in these individuals. Pr...

Bats prey on nocturnally migrating songbirds

...e may in turn explain some of its peculiar natural history traits. First, the species occurs almost exclusively in some restricted parts of the Mediterranean where major streams of migrating birds congregate. Second, it is among the largest Palaeartic bats and even belongs to the heaviest aerial-hunting bat...

Out of Africa -- Bacteria, as well

... us attain further information on aspects of human history that are still hotly disputed today if we analyzed H. pylori in conjunction with human data." For example, after leaving East Africa, the H. pylori population spread through limited localities in southern Africa, West Africa, Northeast Africa, India ...

40,000-year-old skull shows both modern human and Neandertal traits

...s raise important questions about the evolutionary history of modern humans. They could be the result of evolutionary reversal or reflect incomplete palaeontological sampling of Middle Paleolithic human diversity. "They could also reflect admixture with Neandertal populations as modern humans spread throu...

Mystery of fossilized trees is solved

...low. "This was also a significant moment in the history of the planet. The rise of the forests removed a lot of Carbon Dioxide from the atmosphere. This caused temperatures to drop and the planet became very similar to its present-day condition." Dr Berry worked with colleagues from Binghampton Univers...

Napoleon's mysterious death unmasked, UT Southwestern researcher says

...cerated lesion on the emperor's stomach suggests a history of chronic H. pylori gastritis, which might have increased his risk of gastric cancer, Dr. Genta said. The risk might have been further increased by his diet full of salt-preserved foods but sparse in fruits and vegetables ?common fare for long mil...

UF scientists discover new genus of frogmouth bird in Solomon Islands

... real breakthrough in elucidating the evolutionary history of the family," Olson said. ...

Gene study shows three distinct groups of chimpanzees

...stead of just one." To unravel the evolutionary history to chimpanzees, the research team collected DNA from 78 common chimpanzees and six bonobos, a separate species of chimpanzee, and examined 310 DNA markers from each. They found four "discontinuous populations," three of common chimps plus the bon...

Largest genomic search finds genes that may contribute to autism

...xamine the DNA of the nearly 1,200 families with a history of autism. Researchers used so-called "gene chip" technologies to look for genetic similarities among these family members. In addition, the team scanned the same DNA for what are called copy number variations. These are submicroscopic insertions a...

Gene hunters close in on Lou Gehrig’s disease

...radic ALS, which occurs in people without a family history of the disease. In the Johns Hopkins study, des...ALS and 271 adult male and female subjects with no history of neurological disease. Researchers used a new technology known as “SNP chips?to analyze all 555...

Billions of dollars saved in US by polio vaccination

... in the December 2006 issue of Risk Analysis. The history of polio vaccination in the U.S. spans over 50 years and includes different phases of the disease, multiple vaccines, and a sustained significant commitment of financial resources. Lead author of the study, Kimberly Thompson, associate professor of r...

Microfossils unravel climate history of tropical Africa

...eveloped an entirely new method to reconstruct the history of land temperatures based on the molecular fossil...ratures Reconstructing continental temperature history is more difficult than for the oceans, because soils on the continent do not form a continuous archi...

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