assumed 2 5

Tag: "assumed" at biology news

Several minute intermediate stage in virus-cell fusion discovered; opportunity for drug development

...to invade other cells in the body. Scientists had assumed that once a virus begins fusing with a cell's membrane, infection of the host cell was inevitable. Thus, antiviral drug development has largely focused on preventing events that happen either before or after this step. However, a multi-institutional...

AACR Favors 'full spectrum of stem cell research biology'

...mpts have no beneficial goal and can be reasonably assumed to cause harm." At the same time, the AACR position supports the "ethical use of somatic cell nuclear transfer," noting that the technique, "promises to reveal the role of specific genetic alterations in tumorigenesis and further refine evaluations o...

Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows

...had been washed into the ocean, where we generally assumed they were no longer affecting terrestrial ecosystems. Our study shows that sea birds, which feed in the ocean but then come back to land, are returning not only with food for their young but with contaminants as well. The contaminants accumulate in t...

The synapse is a shotgun

...s outside this region. Our model showed that if we assumed that neurotransmitter is released only from vesicles in active zones, where everybody thinks it is released, we get a very bad match to actual properties of the neuron. But if we model broader neurotransmitter release, where these alpha 7 receptors a...

Scientists focus on 'dwarf eye'

... completely different function in mice and was not assumed to alter eye refraction in humans." The research team successfully mapped the MFRP gene mutation in humans and discovered that the protein was completely missing from nanophthalmos patients. In a normal human eye, the MFRP protein is located on t...

Neandertal femur suggests competition with hyenas and a shift in landscape use

...ore regionally focused," Trinkaus said. It's been assumed that this happened in the Upper Paleolithic which is associated with some very late Neandertals and early modern humans. However, this is a femur bone from a Middle Paleolithic Neandertal. It shows in the shape of the femur that a shift to greater mo...

New vaccine protects more effectively against tuberculosis

...nce have started to conquer the globe. It has been assumed that the Beijing isolates emerged in response to drug treatment and vaccination. The new genetically engineered BCG could provide an efficacious measure against this threat. ...

Field of beams - Novel system uses polarized light pulses to reveal crop health

...ial smallpox introduction. "I noticed that when we assumed different distributions of the infectious period in the models, we observed very different epidemic curves," said the researcher. Conversations with Wearing and Keeling followed, alternative models were compared and data from an influenza outbreak we...

Inhaling large amounts of salt can cause hypertension

...ial smallpox introduction. "I noticed that when we assumed different distributions of the infectious period in the models, we observed very different epidemic curves," said the researcher. Conversations with Wearing and Keeling followed, alternative models were compared and data from an influenza outbreak we...

Understanding biases in epidemic models important when making public health predictions

...ial smallpox introduction. "I noticed that when we assumed different distributions of the infectious period in the models, we observed very different epidemic curves," said the researcher. Conversations with Wearing and Keeling followed, alternative models were compared and data from an influenza outbreak we...

Amazon source of 5-year-old river breath

...ore than 1,000 years old," Aufdenkampe says. "They assumed that the return of this forest carbon to the atmosphere must be a slow process that offered at least temporary respite from greenhouse effects. "As part of the largest radiocarbon age survey ever for a single watershed, we show that the enormous amo...

Scientists reveal the shape of a protein that helps retroviruses break into cells

...animals. Ward said paleontologists had previously assumed that Pangea was not just a supercontinent but also a "superhighway" on which species would have encountered few roadblocks while moving from one place to another. However, it appears the greatly reduced oxygen actually created impassable barriers th...

Low oxygen likely made Great Dying worse, greatly delayed recovery

...animals. Ward said paleontologists had previously assumed that Pangea was not just a supercontinent but also a "superhighway" on which species would have encountered few roadblocks while moving from one place to another. However, it appears the greatly reduced oxygen actually created impassable barriers th...

Putting ecology back into river restoration

...jects labelled restoration successes should not be assumed to be ecological successes," Palmer says. ...

Small species back-up giant marsupial climate change extinction claim

...because it's been excavated since the 1840s it was assumed that the palaeoenvironment record was well established. Closer examination revealed a bias in sample collection in favour of larger animals and there had been few attempts to document ecological and sediment data. "Our samples show that species dep...

Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive

...hment. Our results support what people have always assumed ?that romantic love is one of the most powerful of all human experiences. It is definitely more powerful than the sex drive." Depression, murder/suicide, demonstrate strength of romantic drive For instance, Fisher point out, "If someone rejects you...

Variation in women's X chromosomes may explain differences among individuals, between sexes

...own as X inactivation. Originally, scientists had assumed that the inactivation process resulted in complete...y the X chromosome. Scientists had also implicitly assumed that the X chromosomes in all women would be identical. Earlier work of Willard and others shattere...

Scientists discuss improved biopesticides for locust control in West Africa

... been active in locust control since 1997, when he assumed coordination of the USAID-funded project at Virginia Tech, "Development of Biopesticides for Grasshopper and Locust Control in Sub-Saharan Africa," which wrapped up in June 2004. Agblevor participated in this project by developing means of protecting...

US life expectancy about to decline, researchers say

...they used recently published health statistics and assumed that everyone who is currently obese acquired the body mass index of people who have the lowest risk of death. By calculating years-of-life-lost due to obesity and combining that with estimates of the prevalence of obesity in younger generations, th...

Love at first smell

...ystem as other vertebrates, this experiment can be assumed to be important for many animals, including humans. Humans have used perfumes for thousands of years. However, it seems that our choice of perfume should depend on our MHC genes. Perhaps these results explain why some perfumes smell good on some peop...

1 2 3 4 5 6