How roots control plant shoots
...ein that is a "negative regulator," which Sieburth compares with the handle on a water faucet. In a normal plant, BPS1 keeps the faucet shut. But when conditions are bad, it opens the faucet so that the growth-inhibiting carotenoid byproduct flows freely from the roots, telling leaves to stop growing. Sie...MIT: Recycling of scrapped electronics studied
...rom their first use to their recovery. Value added compares the price of the recovered material to the price the recycler paid or was paid to take it away. In case studies of three U.S. firms, the researchers found that the value-based metrics worked well and were easy to use. The researchers stress tha...People cause more soil erosion than all natural processes
... due to natural forces such as glaciers and rivers compares with that caused by human activity---mainly agriculture and construction, Wilkinson said. He used existing data on sedimentary rock distributions and abundances to calculate rates of natural erosion. "If you ask how fast erosion takes place over geo...NIH makes award to UNC for Genome Fingerprint Scanning program
...rstand complex diseases. The most common approach compares proteins expressed in diseased versus normal tissues to determine proteins whose expression levels or forms are significantly changed, indicating a potential role in the disease. One example is a recent study identifying some of the important regula...Researchers reconstruct parts of the genome of a common mammalian ancestor
...said Haussler, who has helped build a browser that compares DNA sequences nucleotide by nucleotide across multiple species (http://genome.ucsc.edu). "You can see where DNA was inserted, where it was deleted, where substitutions happened, and where they didn't happen along the evolutionary path toward humans."...First analysis of chicken genome offers many new insights
...ul for study of its final stages. Wilson compares the chicken genome and other genomes to Rosetta Stones scientists are using to better understand the human genome. As life on Earth evolved over time, genes have been created, kept, discarded or deactivated, and reorganized. At the particular point i...Injectable gel could speed repair of torn cartilage
...hacrylates) and a photosensitive molecule. Burdick compares the procedure, in which the injectable liquid is turned into a gel, to making Jell-O. But instead of using cold temperature for gelation, this technique uses light, which he says is a much more rapid and controlled process. Dont look for the gel anyt...Genome comparison of four campylobacter strains yields new genetic markers and clues to virulence
...appears in the January 2005 issue of PLoS Biology, compares the complete genome sequences of two strains of Campylobacter jejuni the species most often associated with human illness and supplements that analysis by contrasting those with the mostly-finished sequences of three other Campylobacters, including...Study finds disparity in land protection
A new study of the earth's 13 biomes compares the location of parks and other protected lands to the extent of habitat loss and finds that some of the most altered biomes are also the least protected. The study also found the opposite: that some of the least altered biomes are the best protecte...Novel approach yields predictions validated by experiments
...gical system responses that must be considered. He compares the complexity of this task to an aerial view of a busy city with many people, cars, energy, and information moving around. "You want to capture all of that activity, but you have incomplete information," Voit explained. "You can't ask who just calle......le for viral replication, called the promoter, and compares it to those of clades B and E. The viral promoters were known to have different sequences, but the consequences were unknown. Data now show that differences in the clade C promoter triggered massive replication of the virus in cells and during prima...Compound from rare plant shows promise in treating breast cancer
...r of Microbiology at the U. Va. Cancer Center. She compares this discovery to the development of the drug Gleevec for the treatment of chronic myeloid leukemia. Like Gleevec, SL0101 is a signal transduction inhibitor that interferes with the pathways that signal the growth of tumors. "Gleevec is an exciting d...Weight-loss and exercise study compares center- and home-based programs
...of Health. The study, which began in January 2004, compares two weight-loss and exercise programs that are identical except for their locations and delivery of treatment. "Center-based" participants attend classes and walk for exercise at a center established in the Central Florida Research Park, adjacent to ...University research ethics committees: A look from behind closed doors
...embers and lay participants in the IRB process and compares the roles of each type of member who serves on an IRB. Of the seven IRBs Lane studied, two review all types of human subjects research proposals for their universities, three focus on social and behavioral research only, and two reviewed biomedical r......d even as the climate around them changed. Palumbi compares the ability to read genes to counting the rings of a tree but looking at the history of an entire population, not just an individual. Knowing the history of populations is critically important to managing their future, says Palumbi, especially for ...Hydrogen and methane provide raw energy for life at 'Lost City'
...arly as caustic as Liquid-Plumr, Kelley says. This compares to the previously studied black-smoker vents where organisms are well adjusted to acidic pHs. Further, she says, Lost City microbes appear to live off bountiful methane and hydrogen. Absent is carbon dioxide, the key energy source for life at black-s...Same mutation aided evolution in many fish species, Stanford study finds
... out the fishing net and go learn how their theory compares to the real world. According to a Stanford University School of Medicine study published in the March 25 issue of Science , Mother Nature is more predictable than lab experiments suggest. In a diverse group of fish called the stickleback, nature too...Cancerous or harmless? Three genes might tell the tale
....e., minimally invasive) FTCs. Gene-chip analysis compares activity levels of tens of thousands of genes in this case, 33,000 genes in a sample at one time. The researchers focused on the three genes that showed the greatest differences in activity. One gene was almost 145 times more active, a second was e...Why do amyloid diseases strike different tissues?
...at examines each package as it goes down the line, compares it to a standard, and if any package is damaged, then discards the damaged product. Quality control in protein secretion was thought to function similarly: any protein not comparing favorably to wild-type stability would not pass quality control and ...Vitamin A's paradoxical role in influencing symmetry during embryonic development revealed
... instructions and progress symmetrically. Belmonte compares the node to a doorway. "Before embryonic stem cells enter the node, they don't have an orientation. Nor are they differentiated into specialized tissues -- such as heart or brain cells," he said. Once through the doorway, embryonic stem cells have...