Nanotubes glow, even within biological cells
...es taken up by the cells increased smoothly as the concentration or the time of exposure increased. In addition, some cultures were run at cooler temperatures and showed a slower rate of uptake, a finding that suggested that the nanotubes were being ingested through normal phagocytosis. The samples were stu...DFG establishes three new clinical research units
...by the brain, and that it is not the serum glucose concentration which governs the metabolism. Brain glucose regulation is critical for higher organisms since a lack of glucose (neuroglycopenia) can result in dysfunction and can even be fatal. Hepatitis C infection is still a serious health problem. More than 17...Cigarette smoking exacerbates alcohol-induced brain damage
...cetylaspartate is an amino acid derivative and its concentration is used as a measure of neuronal viability. "Together, these findings may indicate a particular vulnerability of subcortical structures to the effects of cigarette smoking," he said. Durazzo added that these findings have significant implications f...A genetic difference at the opiate receptor gene affects a person's response to alcohol
...alcohol that were designed to cause breath alcohol concentration (BAC) levels of .02, .04, and .06. Researchers measured subjective intoxication, stimulation, sedation, and mood states at baseline and at each of the three BAC levels. Results indicate that individuals with the G allele had higher subjective feel......fungus secretes the toxic substances so that their concentration in the fungus falls below the lethal dose. Schoonbeek studied the genes involved in the secretion of toxic substances by ABC transporters. He discovered that the activity of the pumps was partly controlled by the toxic substances. Upon entering the ...Yo-yo diet redistributes toxins in body tissue; Olestra+caloric cut boosts toxic excretion
...esulted in a three-fold increase of 14C amount and concentration in the brain. After weight regain, 14C in the brai...tissue, weight loss resulted in an increase in the concentration of 14C without changing the total amount in the fat tissue. "Weight loss and regain resulted in an i...Ocean colour satellites guide research ship through South Pacific's watery desert
...ell up in their place. The result is a chlorophyll concentration exceeding one mg3, sometimes 10 mg3. The lights of the vessel attracted a large number of squid by night the largest exceeding 1.43 metres and a large variety of birds, including petrels, puffins, and albatrosses, and even a pelican. In this regio...Shedding feathers early may enhance sex appeal, new songbird study shows
...icator of the songbirds' health and quality is the concentration of carotenoid in the feathers, which causes orange-red light to be reflected in their feathers. Physiological stress during molting can reduce carotenoid deposits in the feathers. "Studies of other bird species have shown that females prefer males wi...Genetic polymorphisms, antidepressant use may be associated with altered tamoxifen activity
... the wild-type CYP2D6 allele, the plasma endoxifen concentration was 58% lower in women taking an SSRI than in women who were not taking the drug. The authors conclude that interactions between CYP2D6 polymorphisms and some SSRIs may be associated with altered tamoxifen activity. "SSRIs are likely to gain increasi...No blind mice, thanks to UF scientists
...injury site and the repair cells sniff it out. The concentration of SDF-1 is higher where the cut occurs and it quickly dissipates. But the eye is such a unique place, you've got this bag of jelly -- the vitreous -- that just sits there and it fills up with SDF-1. The SDF-1 doesn't break down. It continues to call...Don't count on vitamin C to boost your exercise performance
...scorbic acid." The study also showed that, "Plasma concentration increased in all subjects following the acute but ... establishing that we were able to increase plasma concentration of ascorbic acid to supra-physiological levels in both young and older adults with acute administrat...Protein adiponectin appears protective against heart disease
...nd that for people with type 1 diabetes, decreased concentration of adiponectin was associated with increased risk ...population raise the possibility that adiponectin concentration may prove not only a useful marker of cardiovascular risk, but also a potential therapeutic agent fo...Born to run? Capacity for aerobic exercise linked to risk of heart disease
...ions, our low-capacity rats have an abnormally low concentration of proteins required for energy production that may underlie the development of common diseases in humans," Britton adds. "And, while our results are intriguing, future research will be needed to prove a direct cause-and-effect relationship between m...Anti-bacterial additive widespread in U.S. waterways
...ograms per liter (parts-per-billion). This maximum concentration was 28 fold higher than previously reported levels, which are currently used by the U.S. Environmental Protection Agency for evaluation of the ecological and human health risks of triclocarban. "Along with its chemical cousin triclosan, the antimicro...Yellowstone microbes fueled by hydrogen, according to U. of Colorado study
...r before been collected. "No one had measured the concentration of hydrogen in the hot springs before because the ...easurements of hydrogen, sulfide, dissolved oxygen concentration and other factors. Spear said it was difficult to explore a microbial ecosystem. "We have a hard e...Report assesses health implications of perchlorate ingestion
...e agency said would correspond to a drinking-water concentration of 1 part per billion based on certain assumptions...ort did not include a corresponding drinking-water concentration with its reference dose because the assumptions that are used to derive drinking-water standards inv...Potentially harmful fluoride levels found in some instant teas
... Public Health Service indicates that the fluoride concentration should not exceed 1.2 ppm. Physicians have been aware that ingestion of high levels of fluoride cause bone-forming cells to lay down extra skeletal tissue, increasing bone density but also bone brittleness. The resulting disease, called skeletal fl...Molecular probes for biology research and drug discovery
... of proteins. The effect is tuneable, as a varying concentration can result in different degrees of phenotype expression. On top of that, the effect can be initiated and studied at different stages in the development of the organism. Finally, the access to small molecule probes enables anyone to study the effect. ...Assessment of recent rapid land-cover change yields portraits of global human impact
...esults indicate that whereas Asia has the greatest concentration of areas of rapid land-cover change, in particular dryland degradation, existing data do not support the claim that the African Sahel is a desertification hotspot. The Amazon Basin remains a hotspot of tropical deforestation, the assessment concludes...Increased risk of osteoporosis associated with gene that one in five people have
... These women also had a higher than normal urinary concentration of a marker that indicates bone resorption and had significantly lower than normal bone density in regions of the upper femur near the hip joint. "The data suggest that this particular variation of the gene produces an enzyme that breaks down estrog...