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Biochemistry & Biophysics
HIV Pays a Price for Invisibility PDF Print E-mail
Monday, 13 April 2009 08:55
Mutations that help HIV hide from the immune system undermine the virus's ability to replicate, show an international team of researchers in the April 13 issue of the Journal of Experimental Medicine. The study was published online on March 23.
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Epigenetics: DNA Isn’t Everything PDF Print E-mail
Monday, 13 April 2009 08:52
Research into epigenetics has shown that environmental factors affect characteristics of organisms. These changes are sometimes passed on to the offspring. ETH professor Renato Paro does not believe that this opposes Darwin’s theory of evolution.
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Life Sticks: Bioengineers' Sticky Insights Illuminate Biological Processes PDF Print E-mail
Friday, 10 April 2009 13:43
Sticky is good. A University of California, San Diego bioengineer is the first author on an article in the journal Science that provides insights on the "stickiness of life." The big idea is that cells, tissues and organisms hailing from all limbs of the tree of life respond to stimuli using basic biological "modules."
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Nicotine May Have More Profound Impact than Previously Thought PDF Print E-mail
Thursday, 09 April 2009 14:48
Nicotine isn't just addictive. It may also interfere with dozens of cellular interactions in the body, new Brown University research suggests.
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Electronics: Keeping the Heat Down PDF Print E-mail
Tuesday, 07 April 2009 08:59
Electronic products are having to accommodate more and more components, all of which generate heat. Too much heat could put laptops and other devices out of action, so manufacturers equip them with metal plates to discharge it. A new composite can do this better.
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Workhorse Immune Molecules Lead Secret Lives in the Brain PDF Print E-mail
Tuesday, 07 April 2009 08:29
Molecules assumed to be in the exclusive employ of the immune system have been caught moonlighting in the brain - with a job description apparently quite distinct from their role in immunity.
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Distinguishing Single Cells with Nothing but Light PDF Print E-mail
Thursday, 02 April 2009 15:59
Researchers at the University of Rochester have developed a novel optical technique that permits rapid analysis of single human immune cells using only light.
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Chemists Create Bipedal, Autonomous DNA Walker PDF Print E-mail
Thursday, 02 April 2009 15:56
Chemists at New York University and Harvard University have created a bipedal, autonomous DNA "walker" that can mimic a cell's transportation system. The device, which marks a step toward more complex synthetic molecular motor systems, is described in the most recent issue of the journal Science.
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Decoding Mysterious Green Glow of the Sea PDF Print E-mail
Wednesday, 01 April 2009 15:39
Many longtime sailors have been mesmerized by the dazzling displays of green light often seen below the ocean surface in tropical seas. Now researchers at Scripps Institution of Oceanography at UC San Diego have uncovered key clues about the bioluminescent worms that produce the green glow and the biological mechanisms behind their light production.
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TV Crime Drama Compound Highlights Immune Cells' Misdeeds PDF Print E-mail
Monday, 30 March 2009 10:09
Detectives on television shows often spray crime scenes with a compound called luminol to make blood glow. Researchers at Washington University School of Medicine in St. Louis have applied the same compound to much smaller crime scenes: sites where the immune system attacks the body's own tissues.
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Scientists Show How a Neuron Gets Its Shape PDF Print E-mail
Monday, 13 April 2009 08:53
Ask a simple question, get a simple answer: When Abraham Lincoln was asked how long a man’s legs should be, he absurdly replied, “Long enough to reach the ground.” Now, by using a new microscopy technique to watch the growth of individual neurons in the microscopic roundworm Caenorhabditis elegans, Rockefeller University researchers are turning another deceptively simple question on its head. They asked, “How long should a worm’s neurons be?” And the worms fired back, “Long enough to reach their targets.”
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Key Decision-point at Which Cells with Broken DNA Repair Themselves or Die Identified PDF Print E-mail
Friday, 10 April 2009 13:50
When cells undergo potentially catastrophic damage, for example as a result of exposure to ionizing radiation, they must make a decision: either to fix the damage or program themselves for death, a process called apoptosis.
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Biologists Discover How 'Silent' Mutations Influence Protein Production PDF Print E-mail
Friday, 10 April 2009 13:40
Biologists at the University of Pennsylvania have revealed a hidden code that determines the expression level of a gene, providing a way to distinguish efficient genes from inefficient ones. The new research, which involved creating hundreds of synthetic green-glowing genes, provides an explanation for how a cell "knows" how much of each protein to make, providing just the right amount of protein to maintain homeostasis yet not too much to cause cell toxicity.
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Major Breakthrough in Transplantation Immunity PDF Print E-mail
Thursday, 09 April 2009 14:33
Australian scientists have made a discovery that may one day remove the need for a lifetime of toxic immunosuppressive drugs after organ transplants.
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New Way to Split Water Into Hydrogen and Oxygen Developed PDF Print E-mail
Tuesday, 07 April 2009 08:57
The design of efficient systems for splitting water into hydrogen and oxygen, driven by sunlight is among the most important challenges facing science today, underpinning the long term potential of hydrogen as a clean, sustainable fuel. But man-made systems that exist today are very inefficient and often require additional use of sacrificial chemical agents. In this context, it is important to establish new mechanisms by which water splitting can take place.
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'Molecular Ripcord' for Chemical Reactions PDF Print E-mail
Tuesday, 07 April 2009 07:18
Researchers at Eindhoven University of Technology (TU/e) have developed an entirely new method for starting chemical reactions. For the first time they used mechanical forces to control catalytic activity – one of the most fundamental concepts in chemistry. This allowed them to initiate chemical reactions with mechanical force. This discovery paves the way to developing materials capable of repairing themselves under the influence of mechanical tension.
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'Taco Shell' Protein: Orientation of Antenna Protein in Photosynthetic Bacteria Described PDF Print E-mail
Thursday, 02 April 2009 15:58

Researchers at Washington University in St. Louis have figured out the orientation of a protein in the antenna complex to its neighboring membrane in a photosynthetic bacterium, a key find in the process of energy transfer in photosynthesis.

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Distinguishing Single Cells with Nothing but Light PDF Print E-mail
Wednesday, 01 April 2009 15:41

ScienceDaily (Apr. 1, 2009) — Researchers at the University of Rochester have developed a novel optical technique that permits rapid analysis of single human immune cells using only light.

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Mutated Gene in Zebrafish Sheds Light on Blindness in Humans PDF Print E-mail
Wednesday, 01 April 2009 15:33
Among zebrafish, the eyes have it. Inside them is a mosaic of light-sensitive cells whose structure and functions are nearly identical to those of humans. There, biologists at The Florida State University discovered a gene mutation that determines if the cells develop as rods (the photoreceptors responsible for dim-light vision) or as cones (the photoreceptors needed for color vision).
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Strategy Discovered for Fighting Persistent Bacterial Infections PDF Print E-mail
Monday, 30 March 2009 10:06
Researchers at National Jewish Health have discovered a promising strategy for destroying the molecular scaffolding that can make Pseudomonas bacterial infections extremely difficult to treat in cystic fibrosis patients, wearers of contact lenses, and burn victims.
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