Controlling the internal clock in darkness
...early every living organism depends on an internal clock to regulate basic biological cycles such as sleep ...tterns, metabolism, and body temperature. And that clock runs on similar molecular mechanisms. Specific clusters of neurons in the brain are known to contro...Jefferson and Brigham and Women's researchers find blue light important for setting biological clock
...lege have found that the body's natural biological clock is more sensitive to shorter wavelength blue light than it is to the longer wavelength green light, which is needed to see. The discovery proves what scientists have suspected over the last decade: a second, non-visual photoreceptor system drives the...Biological clock more influenced by temperature than light
...for the first time that we can take control of the clock in a dish. We can tell it what time we want it to ... The temperature cycle entrained it. We fooled the clock by giving it a novel daily schedule, saying 'This isn't the end of the day. This is morning.'" Her...The science of summer haircuts
...hythm. We have in fact found some of the circadian clock genes are expressed in hair follicles." --"All hair twists as it grows," Philpott says, even in hair that looks completely straight. "The more twists in a hair fiber," he says, "the curlier it will be." --The thickness of hair is generally between...Circadian influence in plants more widespread than previously thought
... the genome under circadian control. "In terms of clock control of mRNA synthesis, it does appear that it'...etween the number of genes whose mRNA synthesis is clock regulated and the number whose mRNA abundance exhibits circadian oscillations. "The answer might lie...Is there an unexpected price for late night high tech excitement?
...ock. Another factor affecting the human biological clock and sleep-wake cycle is thought to be increased mental activity caused by using a computer. It has been reported that melatonin level was influenced by exercise and affective state. It has also been reported that social activities entrained the circa...Body's internal clock is set by newly discovered light detection system in the eye
...tswitching off the melanopsin gene upsets the body clock and reduces pupilresponsiveness to light, but does...o generate an image of our world. The body needs a clock to help itanticipate the different demands of activity and rest. "Jet-lag is the classic example - w...At last: Just three cell types detect light in the eye
...lly in both experiments. "Even if its internal clock says it's night, a normal mouse exposed to bright light will become less active, hide or even go to sleep," says Yau. "It's thought of as a change in motivation, perhaps the mouse's recognition that in light -- even if it's supposed to be nighttime -...Body clocks keep migrating monarchs on course, Science study shows
... Mexico, monarch butterflies depend on an internal clock to help them navigate in relation to the sun, scie...ct evidence of the essential role of the circadian clock in celestial navigation. The study appears in the journal Science, published by the American Associa...An unexplored genomic terrain in a handful of dirt
...ge's chance of reproduction. The presence of alarm clock sequences raises the question of whether these phages are mimicking mechanisms usually involved in the control and activation of tuberculosis latency, said Hatfull....R&D yields numerous applications for conductive polymers
...s) to replace silicon as the substrate material in clock radios, appliance and instrument readouts, automotive dashboard displays, and aircraft cockpit displays. For now, the electronics industry will mainly benefit from the technology, using the materials in EMI shielding and electronic circuits. The dete...Scientists report important data in stem cell debate
...ch as the brain, it can't turn back its biological clock and become blood, bone, or any other type of adult stem cell. But, about four years ago, this fundamental idea received a serious jolt when scientists reported inducing a small percentage of adult stem cells from the brain to switch into cells from...Dartmouth Medical School geneticists discover new role for antisense RNA
...Medical School geneticists studying the biological clock have opened yet another window into the role of an...rs to regulate core timing genes in the circadaian clock that drives the 24-hour light-dark cycle of Neurospora, a model organism better known as bread mold....First draft of 'periodic table' of protein structures helps visualize nature's universe of proteins
...erium. "The map seems to have a loose evolutionary clock embedded in it," Kim said. "It shows the alpha helices and beta sheets developing early, then they started mixing, and finally, one of the mixes took off." In terms of predicting the structure of unknown proteins, the global protein map Kim's group h...Laser-pulse technique could aid drug design
...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 mixed with a cell without triggering reactions. Onc...Clock tells time at such speed that reading it becomes challenge
DENVER, CO - The newest atomic clock is so accurate that its creators theorize that it ...nd in 4.5 billion years. And, they note that their clock is so promising, it's being tested for use in navigating Global Positioning System satellites and to...New study of healthy men finds semen quality decreases with age
...2 percent by age 80. Unlike the female biological clock - which reflects a marked decline in fertility in a woman's mid-30s - the male clock proceeds gradually, the researchers found. The decreased fertility associated with maternal age has...New findings confirm male fertility declines with age
...nfirms that men as well as women have a biological clock even though it may not start ticking as abruptly as women's. One of the lead researchers, Dr Brenda Eskenazi, Director of the Center for Children's Environmental Health Research at the University of California at Berkeley, said: "We measured semen v...Researchers unwind secrets of biological clocks
...gs lakes and floats in on the tides. But inside, a clock is quietly ticking. Even this lowly one-celled ba... and transmits environmental signals to adjust the clock for seasonal changes in day and night, according to the model, published recently in Proceedings of ...Insight into the genetic pathways that drive segmentation like clockwork
... pathway provides the backbone of the segmentation clock in the chick embryo. These findings are reported i...een shown that genes regulated by the segmentation clock (cyclic genes) show oscillations of mRNA levels, this is the first demonstration that the protein of...