Engineers design new optical microprobe to detect subsurface organ abnormalities
.... On the other hand, wavelengths of light are much shorter than those of sound. As a result, "OCT's resolution is much greater," Izatt said. Rather than using the white light of normal endoscopy, this version of OCT harnesses infrared light from a laser-diode that has had one key laser feature disabled. "Str...Tufts University biologists unveil more mysteries of fireflies flash
...ales produced longer flashes while others produced shorter ones. They used computer-generated flashes and light- emitting diodes to simulate male firefly behavior and see which flash types the females responded to most by tracking the females' response flashes. They found that females were much more responsi...Biotech regulations impede crop domestication
...plant that has been genetically engineered to grow shorter faces similar regulatory hurdles as a plant that has been genetically engineered to produce a novel protein. This ignores the widely different potential that two different GMOs may have for the risks people are genuinely concerned about nutritional ...Speedy elephants use a biomechanical trick to 'run' like Groucho
... to its hip height. So even though a cockroach has shorter legs than an elephant, in terms of how many body lengths it can move in a certain amount of time, it may still scurry with greater relative speed than a charging elephant. "At the same Froude number, any animal, regardless of size, should be moving w...Climate change linked to migratory bird decrease
...nger growing season, a North American marmot has a shorter hibernation period, and some migratory birds in Europe are starting to breed earlier. Climate change could also affect the abundance and diversity of birds. The idea is that warmer winters could increase the survival of birds that live in an area yea...With toxic crystals, bacterium targets - and takes out nematodes
...ms and heartworms; and insect pathogens. Most are shorter than short-grained rice. Some, particularly those found in the relative comfort of another organism's gut, can reach lengths of several meters, including one in sperm whales that measures upwards of 13 meters long.Many feed on bacteria. Applying an ...New potential therapy for sickle cell disease
...ess morphine over six hours, showed a trend toward shorter hospitalization, and scored well on all measures of safety. Weiner emphasized that the study was small and that the gas was given for only four hours, which probably was not long enough for nitric oxide to be fully effective. "The fact that we saw di...Laser-pulse technique could aid drug design
...ce] the receptor with the neurotransmitter in much shorter time frames," he says. One way to beat the clock and test the Effects of a potential therapeutic agent is to present the compound as a "caged neurotransmitter," a specially constructed molecule that has no effect on receptor proteins so it can be mix...Braille found to be essential, regardless of age of blindness
...action times for recalled verbs were significantly shorter for sighted subjects. This difference primarily reflected greater consistency in the performance of nearly all sighted subjects compared with several blind subjects. The predominant reaction times even in the latter were similar to those observed in ...International experts to present at Plant Genetics 2003
...tics and include three in-depth presentations plus shorter talks based on selected abstracts. Symposia will be held during the evening and morning hours. Afternoons will be free for continued discussion - perhaps while exploring the diversity of plant life along miles of magnificent mountain trails at one of...Chromosome assessment could predict increased risk of death from age-related disease
... with longer telomeres live longer than those with shorter telomeres has not been tested before now. Richard... longer than those in the bottom half. People with shorter telomeres were found to have higher mortality rates associated with a threefold increase in risk of ...Jefferson Lab experiment generates THz radiation 20,000 times brighter than anyone else
... the length of the electron bunches is as short or shorter than the radiation wavelength of interest. Researchers paving way for T-ray applications For over a decade, scientists worldwide have been pressing the study of light in the terahertz region and looking for better ways to generate and use it. The li...Male groundhogs hibernate less to visit the ladies
...as about 114 days, but males exhibit significantly shorter hibernation seasons of about 106 days compared with females at about 117 days. The timing of hibernation activities did not vary significantly from year to year. Although males "tended" to immerge later and emerge earlier than females, no significa...Effects of rare, devastating disease linked to shrinking of cells' telomeres
...hese compound mutant mice to generate successively shorter telomeres so that they could measure the effects of telomere length on the disease manifestations. In the mice with shortened telomeres, cells became genetically unstable and died, resulting in the degenerative changes seen in premature aging, organ...Physics tip sheet #30 - January 9, 2003
...ar statistical properties to DNA sequences of much shorter length. This is essentially due to the repetitive nature of DNA, especially in the "junk" sections of the genome. But why so much repetition and how did it come about? In this paper, physicists have developed a minimal model of genome evolution and g...Scientists find first active 'jumping genes' in rice
...ong version called the "Ping" sequence and another shorter sequence they named "Pong." Ping lacked functional coding sequence and was also found only in japonica rice as a single copy. On the other hand, Pong was present in high copy numbers in all varieties, contained appropriate coding sequences, and al...Mouse gene knockout illuminates how light resets clock
...t darkness. The melanopsin-deprived mice showed a shorter lengthening of their internal clock day than the control mice. "Light input to the clock was significantly reduced in the melanopsin-deficient animals," said Provencio. "The sensitivity of their circadian system to light was reduced by 50 to 80 pe...Observing proteins and cells in the wild
...ientists must first hit it with a laser light of a shorter wavelength, such as blue. But, if another dye were being used at the same time, one that fluoresces in the blue wavelength, then its signal would be lost in the blue light needed to trigger the first dye. Such spectral overlap limits the use of fluor...Scientists discover gene 'signature' for tumor's tendency to spread
...ic signature would do more poorly (would survive a shorter time) than those whose tumors lacked the signature. They found that this was the case. Finally, the scientists looked in the data for a smaller set of genes that could distinguish between primary and metastatic cancer samples. They found a group of ...Acoustic technique could disinfect medical instruments without heat or harsh chemicals
...e. "We believe that our methods will sterilize in shorter periods of time, which would be a substantial advantage for expensive medical equipment." The patented technique uses a form of cavitation, a phenomenon in which acoustic energy applied to a liquid induces the creation of voids -- or bubbles -- that...