NIA establishes new demography centers to enhance knowledge about older americans
...havioral and experimental economics, studying life cycle planning and intergenerational transfers, and monitoring and examining labor supply issues in an aging population. (co-funded by OBSSR). University of Pennsylvania, Beth J. Soldo, Ph.D. -- UPenn will look at biodemography and early life factors t...American Thoracic Society journal news tips for November 2004 (second issue)
...tern of ozone was in direct contrast to the annual cycle of daily mortality which usually peaks during the winter months. They said that Turin, Prague, Budapest, and Athens had the highest median ozone concentrations, while Tel-Aviv, London, and Paris had the lowest. They said that the major part of the ...Pitt research shows NASA sleep-wake scheduling guide may need to be changed
...as circadian rhythms. In orbit, the sunrise-sunset cycle lasts for a mere 90 minutes, and after the absence of the natural 24-hour cycle for three months or more, the biological clock starts to weaken. When the biological clock gets thro...Broad-based vaccination of wild mice could help reduce lyme disease risk in humans
... bacterium the first summer of their two-year life cycle while taking their first blood meal from infected small animals, such as the white-footed mouse. The white-footed mouse is considered a key animal reservoir for Lyme disease. One year later, after the larva develops into a nymph, it feeds on a second...Researchers describe how human blood stem cells transform themselves to repair injured animal hearts
...d it may work by allowing a cell to enter the cell cycle and divide and produce new progeny, but all of this is new and needs to be studied further," Yeh says. Cells that line the many vessels of the heart, however, developed differently in this experiment, Yeh says. More than 97 percent of endothelial ce...Decreased sensitivity in the brain to estrogen may help explain menopausal changes
...aire about symptoms, for a period of one menstrual cycle or a maximum of 50 days (if no menstruation occurs... In the third group, estrogen levels early in the cycle were similar to those of groups 1 and 2, but, unlike those two groups, did not show further increase...Veterans in better health than other residents of nursing homes, new test for evaluating tinnitus
... several cycling sessions on a computer-controlled cycle ergometer using different electrical stimulation patterns. The experimental stimulation patterns did not significantly improve cycling performance compared with the standard pattern. However, investigators found that using less current during cycling...Unique presentation of delirium after stem cell transplantation
... symptoms included hypoactive behavior, sleep-wake cycle disturbance, and cognitive impairment. Simultaneous complaints of emotional distress, fatigue, and pain were strongly associated with delirium occurrence. This study demonstrates that clinicians cannot rely on classic presentations such as hallucinat...MGH researchers find way of regenerating cells key to hearing
...n indentified as controllers of the different cell cycle phases. Chen's group started by carrying out a co...ell cycle, could be important for halting the cell cycle in hair cells. To follow up that observation, the researchers used a genetically modified mouse str...CPR performance does not follow guidelines
... mm to 51 mm, and the compression part of the duty cycle was 42 percent. An average of 11 ventilations were given per minute. Sixty-one patients (35 percent) had return of spontaneous circulation, and 5 of 6 patients discharged alive from the hospital had normal neurological outcomes. "Whether some of the...Calcium boost to youths' bones could reduce osteoporosis risk
...tment." In patients with osteoporosis, the natural cycle of losing and adding minerals in healthy bone falls out of balance and the loss outpaces the gain, leading to low bone mass, structural deterioration of bone tissue, fragility and an increased susceptibility to fractures of the hip, spine and wrist. ......ing had an abnormal test result. A self-fulfilling cycle ensues: more annual screening leads to more abnorm.... It involves interrupting this positive feedback cycle in addition to breaking the ingrained habit of annual screening." The authors point out that even wi...Rat whisking may provide insight into debilitating eye disorder
...ignal the furnace to turn on. This type of vicious cycle appears to occur in blepharospasm. Normally, the blinking reflex protects the eye from bright light and other environmental hazards, but in blepharospasm this blinking response gets out of control. The resulting muscle spasms can be so intense that...New study finds kelp can reduce level of hormone related to breast cancer risk
...e. Studies in humans have linked longer menstrual cycle lengths to lower risk of breast, ovarian and endometrial cancers. "If you have longer cycles, you actually have fewer periods over a lifetime, which means less time is spent overall in the phases where hormone levels and breast and endometrial cell p...Stroke patients receive better care when hospitals 'get with the guidelines'
...e GWTG-Stroke program addresses the type of "rapid cycle improvement" needed to target this problem. "It's the first program that has been able to show this much improvement in stroke care so rapidly across this scope and scale of patients and hospitals," he said. "Guidelines by themselves are not succe...Medication helps alcoholics control drinking
... from having one drink, but rather in breaking the cycle where one drink leads to many more. "Naltrexone helps people have more control over the use of alcohol. For me, that's the fundamental issue of what addiction is: impaired control." However, this approach requires a substantial change from the abstin...Scientists replicate hepatitis C virus in laboratory
...re will allow researchers to better study the life cycle and biology of this virus and to test potential an...tem only represents the tail end of the viral life cycle viral replication, assembly and release from host cells. Another HCV model system is needed to sho...New substance that improves the photodetection of bladder cancer gains market approval
...t metastasis. Exploiting a cellular manufacturing cycle Van den Bergh and Wagnires' group developed this molecule by exploiting naturally occurring cellular processes. Protoporphyrine IX (PPIX), a naturally occuring photoactive porhyrine produced normally as an intermediate step in the cellular manufactu...Meditation may reduce heart disease risk
...en. But obesity appears to be part of an unhealthy cycle where the stresses of everyday life such as poverty and not feeling safe at home contribute to bad habits such as overeating and/or eating high-fat comfort foods and not exercising. Stress also may impair sleep, preventing the body and blood pres...Student identifies electrical changes preceding heart failure
... very least, hinder the progression of the vicious cycle of events that ultimately leads to death." During heart failure, the pumping action of the heart becomes inadequate, resulting in a back pressure of blood along with congestion of the lungs and liver. Nearly 5 million Americans suffer from heart fai...