The News
Pollution Found to Inhibit Rainfall in China
by Jon Hamilton
All Things Considered, March 8, 2007 · Pollution in central China has caused a steady decrease of rain in the mountains, according to new research. As an example, scientists say small particles from air pollution in the city of Xi'an are causing clouds to hold on to their moisture rather than dropping it on nearby Mt. Hua. On the haziest days, rainfall can be reduced by half.
The Research
Read the research behind this story in the journal Science.
Thursday, March 8, 2007
The News
Drug delivery system uses nanotechnology
BUFFALO, N.Y., March 8 (UPI) -- U.S. scientists have developed an unusual nano-centered drug delivery system in which the drug itself acts as the delivery vehicle.
The process of efficiently delivering drugs, especially those that are hydrophobic, or water-repellant, to tumors or other disease sites has long been problematic. But now scientists at the University at Buffalo's Institute for Lasers, Photonics and Biophotonics and the Roswell Park Cancer Institute have developed a drug delivery system that uses nanocrystals measuring about 100 nanometers of pure HPPH, (2-devinyl-2-(1'-hexyloxyethyl) pyropheophorbide), a photosensitizer currently in Phase I/II human clinical trials for treating various types of cancer.
The researchers found the nanocrystals of HPPH were taken up by tumors in vivo, with efficacy comparable to conventional, surfactant-based delivery systems.
The Research
Read the research behind this story in the journal Molecular Pharmaceutics.
Drug delivery system uses nanotechnology
BUFFALO, N.Y., March 8 (UPI) -- U.S. scientists have developed an unusual nano-centered drug delivery system in which the drug itself acts as the delivery vehicle.
The process of efficiently delivering drugs, especially those that are hydrophobic, or water-repellant, to tumors or other disease sites has long been problematic. But now scientists at the University at Buffalo's Institute for Lasers, Photonics and Biophotonics and the Roswell Park Cancer Institute have developed a drug delivery system that uses nanocrystals measuring about 100 nanometers of pure HPPH, (2-devinyl-2-(1'-hexyloxyethyl) pyropheophorbide), a photosensitizer currently in Phase I/II human clinical trials for treating various types of cancer.
The researchers found the nanocrystals of HPPH were taken up by tumors in vivo, with efficacy comparable to conventional, surfactant-based delivery systems.
The Research
Read the research behind this story in the journal Molecular Pharmaceutics.
Wednesday, March 7, 2007
The News
CT screening for lung cancer ineffective
NEW YORK, March 7 (UPI) -- A U.S. study finds that CT screening for lung cancer does not appear to cut down the death rate.
Some patients also have unnecessary surgery after the cancer, researchers told The New York Times. Earlier attempts to detect lung cancer early with chest X-rays had been disappointing.
"When we took this study on, we were expecting that CT might do the job where chest X-rays couldn't," said Dr. Peter B. Bach of Memorial Sloan-Kettering Cancer Center, the lead author.
Another recent study found that early detection increases survival time. But critics said that is meaningless because if a cancer cannot be effectively treated detecting it early only means a longer time between detection and death.
The Research
Read the research behind this story in the Journal of the American Medical Association
CT screening for lung cancer ineffective
NEW YORK, March 7 (UPI) -- A U.S. study finds that CT screening for lung cancer does not appear to cut down the death rate.
Some patients also have unnecessary surgery after the cancer, researchers told The New York Times. Earlier attempts to detect lung cancer early with chest X-rays had been disappointing.
"When we took this study on, we were expecting that CT might do the job where chest X-rays couldn't," said Dr. Peter B. Bach of Memorial Sloan-Kettering Cancer Center, the lead author.
Another recent study found that early detection increases survival time. But critics said that is meaningless because if a cancer cannot be effectively treated detecting it early only means a longer time between detection and death.
The Research
Read the research behind this story in the Journal of the American Medical Association
Tuesday, March 6, 2007
The News
Low-Carb vs. Low-Fat: A New Study Weighs In
by Patricia Neighmond
All Things Considered, March 6, 2007 · As an increasing number of Americans struggle with extra pounds, popular diet strategies have flooded the market. New low-carb, high-fat strategies have challenged traditional low-fat, high-carb wisdom.
To get to the bottom of the low-carb vs. low-fat debate, researchers from Stanford University tested four diets, each with varying levels of fat and carbohydrate intake.
The research finds that women assigned to the Atkins diet – the diet with the lowest carbohydrate intake – lost slightly more weight than women on other diets.
The Research
Read the research behind this story in the Journal of the American Medical Association.
Low-Carb vs. Low-Fat: A New Study Weighs In
by Patricia Neighmond
All Things Considered, March 6, 2007 · As an increasing number of Americans struggle with extra pounds, popular diet strategies have flooded the market. New low-carb, high-fat strategies have challenged traditional low-fat, high-carb wisdom.
To get to the bottom of the low-carb vs. low-fat debate, researchers from Stanford University tested four diets, each with varying levels of fat and carbohydrate intake.
The research finds that women assigned to the Atkins diet – the diet with the lowest carbohydrate intake – lost slightly more weight than women on other diets.
The Research
Read the research behind this story in the Journal of the American Medical Association.
The News
Psychological And Physical Torture Have Similar Mental Effects
Science Daily — Forms of ill treatment during captivity that do not involve physical pain--such as psychological manipulation, deprivation, humiliation and forced stress positions--appear to cause as much mental distress and traumatic stress as physical torture, according to a report in the March issue of Archives of General Psychiatry, one of the JAMA/Archives journals.
The Research
Read the research behind this story in the journal Archives of General Psychiatry.
Psychological And Physical Torture Have Similar Mental Effects
Science Daily — Forms of ill treatment during captivity that do not involve physical pain--such as psychological manipulation, deprivation, humiliation and forced stress positions--appear to cause as much mental distress and traumatic stress as physical torture, according to a report in the March issue of Archives of General Psychiatry, one of the JAMA/Archives journals.
The Research
Read the research behind this story in the journal Archives of General Psychiatry.
Sunday, March 4, 2007
The News
Fossil bridges horned-dinosaur gap
By The Associated Press
Article Last Updated: 03/03/2007 11:09:44 PM MST
Cleveland - A new dinosaur species was a plant-eater with yard-long horns over its eyebrows, suggesting an evolutionary middle step between older dinosaurs with even larger horns and the small-horned creatures that followed, experts said.
The dinosaur's horns, thick as a human arm, are like those of triceratops - which came 10 million years later. However, this animal belonged to a subfamily that usually had bony nubbins a few inches long above their eyes.
Michael Ryan, curator of vertebrate paleontology for the Cleveland Museum of Natural History, published the discovery in this month's Journal of Paleontology. He dug up the fossil six years ago in southern Alberta, Canada, while a graduate student for the University of Calgary.
"Unquestionably, it's an important find," said Peter Dodson, a University of Pennsylvania paleontologist. "It was sort of the grandfather or great uncle of the really diverse horned dinosaurs that came after it."
The Research
Read the research behind this story in the Journal of Paleontology.
Fossil bridges horned-dinosaur gap
By The Associated Press
Article Last Updated: 03/03/2007 11:09:44 PM MST
Cleveland - A new dinosaur species was a plant-eater with yard-long horns over its eyebrows, suggesting an evolutionary middle step between older dinosaurs with even larger horns and the small-horned creatures that followed, experts said.
The dinosaur's horns, thick as a human arm, are like those of triceratops - which came 10 million years later. However, this animal belonged to a subfamily that usually had bony nubbins a few inches long above their eyes.
Michael Ryan, curator of vertebrate paleontology for the Cleveland Museum of Natural History, published the discovery in this month's Journal of Paleontology. He dug up the fossil six years ago in southern Alberta, Canada, while a graduate student for the University of Calgary.
"Unquestionably, it's an important find," said Peter Dodson, a University of Pennsylvania paleontologist. "It was sort of the grandfather or great uncle of the really diverse horned dinosaurs that came after it."
The Research
Read the research behind this story in the Journal of Paleontology.
Saturday, March 3, 2007
The News
Peruvian Citadel Is Site Of Earliest Ancient Solar Observatory In The Americas
Science Daily — Archeologists from Yale and the University of Leicester have identified an ancient solar observatory at Chankillo, Peru as the oldest in the Americas with alignments covering the entire solar year, according to an article in the March 2 issue of Science.
Recorded accounts from the 16th century A.D. detail practices of state-regulated sun worship during Inca times, and related social and cosmological beliefs. These speak of towers being used to mark the rising or setting position of the sun at certain times in the year, but no trace of the towers has ever been found. This paper reports the earliest structures that support those writings.
The Research
Read the research behind this story in the journal Science
Peruvian Citadel Is Site Of Earliest Ancient Solar Observatory In The Americas
Science Daily — Archeologists from Yale and the University of Leicester have identified an ancient solar observatory at Chankillo, Peru as the oldest in the Americas with alignments covering the entire solar year, according to an article in the March 2 issue of Science.
Recorded accounts from the 16th century A.D. detail practices of state-regulated sun worship during Inca times, and related social and cosmological beliefs. These speak of towers being used to mark the rising or setting position of the sun at certain times in the year, but no trace of the towers has ever been found. This paper reports the earliest structures that support those writings.
The Research
Read the research behind this story in the journal Science
Friday, March 2, 2007
The News
Why Katrina Became a Monster and Rita Fizzled
by Jon Hamilton.
All Things Considered, March 1, 2007 · It's a tale of two hurricanes. Katrina and Rita were both massive storms as they churned along a similar path through the Gulf of Mexico in 2005. But Katrina remained strong as it approached land while Rita faded. Scientists say they're beginning to understand why the two storms behaved so differently.
The Research
Read the research behind this story in the journal Science.
Why Katrina Became a Monster and Rita Fizzled
by Jon Hamilton.
All Things Considered, March 1, 2007 · It's a tale of two hurricanes. Katrina and Rita were both massive storms as they churned along a similar path through the Gulf of Mexico in 2005. But Katrina remained strong as it approached land while Rita faded. Scientists say they're beginning to understand why the two storms behaved so differently.
The Research
Read the research behind this story in the journal Science.
Thursday, March 1, 2007
The News
Ants may help us adjust to global warming
TERRE HAUTE, Ind., Feb. 28 (UPI) -- A U.S.-led team of international biologists says some ants have adjusted well to urban warming and may help other species adapt to such climate change.
The researchers, led by Michael Angilletta of Indiana State University, note large cities can be more than 10 degrees hotter than their surroundings, with such urban heat islands stressing animals and plants.
The scientists discovered that ants in Sao Paulo, Brazil, South America's largest city, can tolerate heat better than ants from elsewhere. That finding suggests Sao Paulo ants have adjusted physiologically in response to urban warming.
The Research
Read the research behind this story in the journal PLoS One.
Ants may help us adjust to global warming
TERRE HAUTE, Ind., Feb. 28 (UPI) -- A U.S.-led team of international biologists says some ants have adjusted well to urban warming and may help other species adapt to such climate change.
The researchers, led by Michael Angilletta of Indiana State University, note large cities can be more than 10 degrees hotter than their surroundings, with such urban heat islands stressing animals and plants.
The scientists discovered that ants in Sao Paulo, Brazil, South America's largest city, can tolerate heat better than ants from elsewhere. That finding suggests Sao Paulo ants have adjusted physiologically in response to urban warming.
The Research
Read the research behind this story in the journal PLoS One.
The News
Atomic microscopy offers chemical ID
OSAKA, Japan, March 1 (UPI) -- Japanese scientists say they've discovered it is possible to use atomic force microscopy to identify the chemical makeup of individual surface atoms.
Atomic force microscopy works by measuring the short-range forces that occur between a tiny tip and the atoms on the surface of a sample, allowing the structure of that surface to be imaged with atomic resolution.
But the precise forces between the tip and the atoms also depend subtly on the identity of the atoms involved. Oscar Custance and colleagues at Osaka University refined the imaging technique to the point where it's possible to not only to detect individual atoms but also recognize their chemical identity, even at room temperature.
The Research
Read the research behind this story in the journal Nature.
Atomic microscopy offers chemical ID
OSAKA, Japan, March 1 (UPI) -- Japanese scientists say they've discovered it is possible to use atomic force microscopy to identify the chemical makeup of individual surface atoms.
Atomic force microscopy works by measuring the short-range forces that occur between a tiny tip and the atoms on the surface of a sample, allowing the structure of that surface to be imaged with atomic resolution.
But the precise forces between the tip and the atoms also depend subtly on the identity of the atoms involved. Oscar Custance and colleagues at Osaka University refined the imaging technique to the point where it's possible to not only to detect individual atoms but also recognize their chemical identity, even at room temperature.
The Research
Read the research behind this story in the journal Nature.
Subscribe to:
Posts (Atom)