Minggu, 09 Januari 2011

ScienceDaily Top Science Headlines

for Sunday, January 9, 2011

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Origin of life on Earth: 'Natural' asymmetry of biological molecules may have come from space (January 7, 2011) -- Certain molecules do exist in two forms which are symmetrical mirror images of each other: they are known as chiral molecules. On Earth, the chiral molecules of life, especially amino acids and sugars, exist in only one form, either left-handed or right-handed. Why is it that life has initially chosen one form over the other? Now researchers have for the first time obtained an excess of left-handed molecules (and then an excess of right-handedones) under conditions that reproduce those found in interstellar space. This result therefore supports the hypothesis that the asymmetry of biological molecules on Earth has a cosmic origin. The researchers also suggest that the solar nebula formed in a region of massive stars. ... > full story

More evidence that malaria drug could help combat cancer, and that breaks from treatment could improve results (January 7, 2011) -- Scientists investigating the cancer-fighting properties of artesunate – a drug commonly used to treat malaria – have found early evidence that combining it with an existing cancer drug has the potential to make each drug more effective than when used alone. ... > full story

Packaging that knows when food is going bad (January 7, 2011) -- Packaging that alerts consumers to food which is starting to go bad is being developed by researchers in the UK. ... > full story

Potential new anti-cancer mechanism (January 7, 2011) -- Scientists have succeeded in decoding a potential new anti-cancer mechanism. The researchers discovered that normalizing abnormal tumor blood vessels through HRG (histidine-rich glycoprotein) prevents metastasis of tumor cells and enhances chemotherapy efficiency. ... > full story

What carbon cycle? College students lack scientific literacy, study finds (January 7, 2011) -- Most college students in the United States do not grasp the scientific basis of the carbon cycle -- an essential skill in understanding the causes and consequences of climate change, according to new research. ... > full story

Evidence lacking for widespread use of costly antipsychotic drugs, study suggests (January 7, 2011) -- Many prescriptions for the top-selling class of drugs, known as atypical antipsychotic medications, lack strong evidence that the drugs will actually help, a new study has found. Yet, drugs in this class may cause such serious effects as weight gain, diabetes and heart disease, and cost Americans billions of dollars. ... > full story

Scientists construct synthetic proteins that sustain life (January 7, 2011) -- In a groundbreaking achievement that could help scientists "build" new biological systems, Princeton University scientists have constructed for the first time artificial proteins that enable the growth of living cells. ... > full story

High dietary fat, cholesterol linked to increased risk of breast cancer (January 7, 2011) -- Elevated fat and cholesterol levels found in a typical American-style diet play an important role in the growth and spread of breast cancer, say researchers. ... > full story

Andromeda’s once and future stars (January 7, 2011) -- Two European Space Agency observatories have combined forces to show the Andromeda Galaxy in a new light. Herschel sees rings of star formation in this, the most detailed image of the Andromeda Galaxy ever taken at infrared wavelengths, and XMM-Newton shows dying stars shining X-rays into space. ... > full story

IVF breakthrough to hit the world market (January 7, 2011) -- An Australian reproductive biologist has achieved a major breakthrough in IVF technology that is expected to help millions of women around the world who have suffered previous miscarriages after IVF treatment. ... > full story

Health chip gives instant diagnoses (January 7, 2011) -- Soon, your family doctor will no longer have to send blood or cancer cell samples to the laboratory. A little chip will give her test results on the spot. ... > full story

Regional dialects are alive and well on Twitter: Slang terms like y'all, yinz, koo, coo and suttin predict location of tweet authors (January 7, 2011) -- Microbloggers may think they're interacting in one big Twitterverse, but computer science researchers find that regional slang and dialects are as evident in tweets as they are in everyday conversations. ... > full story

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