Tag: "caused" at biology news

Potential for enhanced sequestration of carbon in soils supports evaluations

...romising" techniques for mitigating global warming caused by the greenhouse effect. According to Post's team, agriculturally based options for reducing net greenhouse gas emissions by increasing sequestration of carbon in soils "should be evaluated to see how competitive they are in comparison with a variet...

Genetic mutations linked to the practice of burning coal in homes in China

... to both p53 and K-ras are thought to be primarily caused by chemicals called polycyclic aromatic hydrocarbons that are emitted during the burning of smoky coal. The study found that 15 individuals, or 16.3 percent, tested positive for genetic mutations 13 individuals tested positive for p53 mutations, one...

Climate change plus human pressure caused large mammal extinctions in late Pleistocene

...war that shows slow or no progress, is that humans caused extinction through long-term habitat alteration. Barnosky and his colleagues found sparse evidence outside Australia that humans were the sole cause of extinction. Data are sketchy for the Australian continent, Barnosky cautioned, but little climate ...

Researchers determine genetic cause of Timothy syndrome

...al studies revealed that it was not inherited, but caused by a mutation that occurred spontaneously. Eventua...evealed that in all the patients, the disorder was caused by a change in a single DNA unit, or nucleotide, in the CaV1.2 calcium channel. "This channel...

Cigarette smoke causes breaks in DNA and defects to a cell's chromosomes, Pitt study finds

...esearch has focused on the changes in DNA sequence caused by cigarette smoke, little attention has been give...ke condensate equal to about 1/25 of a cigarette caused breaks to both strands of DNA and compromised the integrity of the cell's chromosomes. Cigarette sm...

'Dead zone' area shrinking, Texas A&M prof says

...se of the dead zone. Many scientists believe it is caused by fertilizer runoff from the Mississippi River, while other theories point to more complicated and interrelated factors. "Just a few weeks before we went on our research cruise, other teams in the area reported seeing few if any fishing boats in the...

Chemical derived from vitamin-E shows early promise as cancer drug

...ng the cancer cells' ability to divide, alpha-TEA caused the cancer cells to shrink and die through a process called apoptosis compared to untreated breast cancer cells. "One reason that alpha-TEA is such a potent anti-cancer agent is that it impacts on numerous anti-growth and pro-death cellular pr...

Study: Emission of smog ingredients from trees is increasing rapidly

Changes in U.S. forests caused by land use practices may have inadvertently worse...d computer models to estimate the changes in ozone caused by the changes in tree-produced VOCs. Purves noted that interactions between VOCs, NOx and ozone are...

Tracing genes, biologists show lizard migration is traced to Florida

...on tens of years versus up to millions. That has caused speculation that a new species or two is evolving from the genetic card shuffling occurring in Florida. "These lizards have become a grand experiment,' Kolbe said, referring to a long series of studies that Losos and Larson have performed on...

Alaska scientists find Arctic tundra yields surprising carbon loss

...ryone had assumed increased decomposition would be caused by increased temperatures, and the main effect of ... atmospheric carbon dioxide concentrations than is caused by fossil fuel burning. "The paradigm is that decomposers (microbes) are always limited by carbon a...

New sequence involved in DNA replication timing may aid in cancer detection

...copies produced a partial effect, and three copies caused replication to occur in late S phase. The researchers confirmed this finding by removing the LCSs from a late-replicating origin to convert it to an early-replicating origin. "Interestingly," noted Huberman, "in many cancer cells, the normal order of...

Pollutant causes delayed flowering in plants

...ternal concentrations of nitric oxide, as might be caused by air pollution." Such biochemical pathways are networks of protein enzymes that make up the signaling machinery that controls the flowering process. "While our work is very much at a very detailed molecular level, I would bet that these findings ha...

University of Alberta researcher looks for clues to mysterious disease

... of the first signs--walking and balance is wobbly caused by ataxia or lack of muscle control--start appearing. "Kids are often misdiagnosed with cerebral palsy but what distinguishes A-T is it gets worse," said Campbell. "Sadly, many of the people with A-T end up in wheelchairs and most die young (I t...

Wolverine takes a road trip

...cted due to a lack of data that documents declines caused by human related threats. ...

Secretary of Energy announces seven E.O. Lawrence Award Winners

...nomy to correct telescopic images for the blurring caused by light passing through the atmosphere. Max is professor and astronomer at the University of California, Santa Cruz, and a physicist at the Institute of Geophysics and Planetary Physics at LLNL. Mortensen, a mechanical engineer, w...

Study explores gene transfer to modify underlying course of Alzheimer's disease

... or the use of skin cells. Alzheimer's disease is caused by brain degeneration and is marked by the death of cells, particularly the cells (cholinergic neurons) in the basal forebrain. These cells are the primary source of the brain chemical messenger (neurotransmitter) called acetylcholine. Alzheimer's di...

DuPont scientist named one of the world's top young innovators by MIT's 'Technology Review' Magazine

...with the advent of the Internet," she said. "It's caused us to take a 90-degree change in perspective in how we view traditional telecommunications applications. This work represents new applications and a whole new arena for photonics technologies. It's an exciting time to be involved in this research."...

Experimental drug shown to block mutant protein causing blood disease

...bone-marrow transplant to treat the acute leukemia caused by her MPD. PKC412 acts similarly to the pioneerin...th Acute Myeloid Leukemia, some cases of which are caused by a mutant on-off switch called FLT3. The drug specifically blocks abnormal FLT3 kinases. MPD is ca...

Prion propagation: Avoiding the toxic oligomer

...th rate was moderated by NM conformational changes caused after binding to the fiber ends. Shaking the samples increased polymerization rate. During polymerization reactions, the authors observed a pronounced pause, followed by an abrupt increase in polymerization rate. Since the length of the pause showed...

Genes expose secrets of sex on the side

... "Because we don't think the pattern we see was caused by an event that swept across the globe, we had to re-examine our assumptions about whether equal numbers of men and women are mating," Wilder said. The team thinks the genetic patterns are all about sex. Or lack thereof...

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