Cocaine harms brain's 'pleasure center,' addict study finds
... that cocaine causes more dopamine transporters to travel from the interior of a cell to the membrane, increasing the overall dopamine uptake level. The data provide support for the idea that chronic cocaine abuse leads to a phenomenon seen in animals, called allostasis of reward. With extended use of coca...In mutually beneficial relationship, slowest-evolving species gains upper hand
...negotiating where to meet. Each wants the other to travel farther, but the king explains that he is at a disadvantage because he can only move one square at a time. Since the queen can move as many spaces as she wants, she relents and meets her husband on his side of the board. Bergstrom and Lachmann worked...Gene responsible for rewinding body's 'clock' described by scientists at TSRI
...o adapt to a change in schedule such as during jet travel or shift work. But until this latest study, the genes that are responsible for doing this phase-shifting were not known. Melanopsin was hypothesized to be this photoreceptor, but scientists lacked proof of it until now. A Light Even the Blind Can S...Observing proteins and cells in the wild
... cystic fibrosis and Alzheimer's, certain proteins travel to the wrong places; like a milk truck delivering its goods to a post office instead of the grocery store, the aberrant proteins disrupt the working community of the cell. By using quantum dots to follow these proteins once they are produced in body ...New books show social side of weather and climate
...e? This first science offering in the Rough Guide travel and reference series is both a basic guide to the atmosphere and a reference for travelers of the active or armchair variety. The book's opening chapters explain the ingredients of weather and climate and examine wild weather--from tornadoes and hu...Too many turtles may end up as roadkill
...s are the most affected by collisions because they travel the farthest: land turtles move about five miles per season, and large pond turtles move up to three miles to nest sites. In contrast, small pond turtles migrate only about 300 feet to nest sites. However, Gibbs and Shriver point out that even small...$3.2 million project to document dioxin levels in Houston ship channel
...ironment, possibly ending up in crab and fish that travel to fishing regions. "This aspect of the study is quite interesting because such a comprehensive model has never been attempted before," says Hanadi Rifai, associate professor of environmental engineering at UH and principal investigator on the Ship C...Targeted radiation to liver tumors spares tissue, improves quality of life
...atheter placed in the artery feeding the liver and travel via the blood stream, where the spheres are targeted to the tumors within the liver. The spheres are trapped in the small blood vessels of the tumor (doctors do not have to identify the number or location of tumors, since the spheres target the cance...Physics tip sheet #29 October 23, 2002
...o. The theory also predicts that the ridges should travel down the icicle at half the rate of the icicle growth, something that still has to be checked experimentally. Journal article: http://link.aps.org/abstract/PRE/v66/e041202 2) Speed of virus infections correctly predicted by physical models J. For...A Magic Web: The Tropical Forest of Barro Colorado
...the National Zoo, Washington, D.C. next spring and travel throughout the US. Evolutionary biologist Ernst Mayr recommends: "Visit the tropics by all means, for there is nothing more wonderful than the tropical forest, but if you can't, read A Magic Web."...Families with two or more children with autism sought for $10.2 million study
...e free diagnostic evaluations, and their families' travel and hotel expenses associated with the study also will be covered. The genetic testing and diagnostic evaluations will be conducted at cooperating universities and clinics in Alaska, Arizona, California, Colorado, Florida, Georgia, Idaho, Montana, Ne...Shadow proteins in thymus - Clues to how immune system works?
...antigens that the T cells will encounter once they travel out into the body. "There is a foretelling of these proteins in the thymus, which is why we call it an immunological self-shadow," said Mathis. In a critical step, the Joslin team discovered that the transcription factor aire plays a critical role i...DNA unzipping found to take at least two proteins, not one alone
...ir hosts. Helicases separate strands of DNA. They travel along DNA highways, powered by ATP, a fuel molecule. For many years, scientists have argued whether it takes a single protein or multiple proteins to unzip DNA. "The primary evidence for the ability of a single molecule to unzip DNA was based on the...Chemical switch determines if healthy cells are killed by chemotherapy
...otherapy drugs, these are carried in the blood and travel throughout the body. They work by irreparably gumming up DNA in rapidly dividing tumor cells. That damage then triggers the cells to self-destruct through a natural process known as apoptosis, or active cell death. The drugs also can harm rapidly di...Public calls on U.S. government to protect the world's coral reefs, new poll finds
... 78% of Americans surveyed would be less likely to travel on a cruise ship that causes pollution on coral reefs through the discharge of waste and bilge water. Although tropical coral reefs cover only one-tenth of one percent of the entire area of the oceans, they are home to 25% of all marine life, includi...Mosquito genome sequence--Published in the journal Science
...n blood, certain proteins and lipids from her meal travel to her ovaries, helping the eggs to develop in two to three days. After she has laid the eggs, the cycle of host-finding, blood feeding, digestions, and egg development begins once again. Holt and his colleagues did a special study of the genes that ...University of Pittsburgh scientist discusses blood cell damage from biomedical devices
...same devices also can damage the blood cells which travel through them. Severe consequences can result when blood cells are damaged or broken down, said Marina Kameneva, Ph.D., research associate professor of surgery at the University of Pittsburgh School of Medicine. Dr. Kameneva will discuss the issue in ...UT Southwestern receives $2 million grant to purchase 30-ton superconducting magnet
...ir work, Gardner added: "We previously have had to travel to sites that had this more powerful equipment. Having the ability to do these experiments here will make a tremendous difference." The newest spectroscopic methods being developed can describe processes such as protein and RNA folding, protein-prote...One gene, two important proteins
... Activators of Transcription"), which subsequently travel to the nucleus, bind to specific patches of DNA and switch on corresponding genes - the end result being the production of new proteins. Today, scientists know that the JAK-STAT pathway faithfully relays the messages of at least 40 different molecul...Interpreting a climate record from 10,000-year-old migrating waters
...urface area of a mineral the migrating water would travel through, that still cannot be established. Nevertheless, the results of these simulations indicate it may not be too long before records of climate change can be constructed for the last 100,000 years. Vadose Zone Journal, www.vadosezonejournal.org ...