Sex and genetics: Why birds are unfaithful to their partners
...es have negative consequences for the offspring, a phenomenon known as inbreeding depression. But what if you en...ce of alternative reproductive strategies with the phenomenon of inbreeding depression. It is well established that if close relatives mate, they suffer reduced b...Pregnancy hormone estriol shows promise as multiple sclerosis treatment in first human trials
...ed treatment for MS based on a naturally occurring phenomenon in pregnancy. At present the only approved treatments are anti-inflammatory drugs administered with injections," said Voskuhl, also a research scientist at UCLA's Brain Research and Neuropsychiatric institutes. "Our findings also hold promise for fin...Stanford researchers teach old owls new tricks
...o quickly pick up new skills and information. This phenomenon is the reason that children recover much faster from head injuries than adults. To test adult learning, Eric Knudsen, PhD, the Edward C. and Amy H. Sewall Professor in the School of Medicine, and Linkenhoker took advantage of a quirk in barn o...One gene, two important proteins
... its kind will thrive. Darnell first observed this phenomenon in the early 1980s and concluded that molecular cues from a cell's natural environment must control the production of tissue-specific proteins. The next big question was how. Over the next decade or so, he and colleagues provided more than an answer ...Sex-pheromone link to insect evolution
...area, specifically to determine the breadth of the phenomenon and how it affects the evolution of many insect communication systems. His research team will be working on the genomes of fruit flies, mosquitoes, crickets and silkworms to detect if these kinds of genes are present....Awards of the Netherlands greatest prize for science
...ifficult, such as paint. In 1985 he discovered the phenomenon of increased back-scatter: when light enters a pot of white paint, twice as much light is reflected back along the axis of the incident beam as in every other direction. Later his group discovered the 'Amsterdam effect', whereby paint particles refle...Nutritional supplements may combat muscle loss
... have had major operations. We're looking at this phenomenon in terms of space flight, but the study has many other implications," Ferrando said....A message from nature to muskrats: 'Dont chill out'
... rates of cellular reactions (Q10 effect) and this phenomenon may account for the hypometabolic state of cooled tissues. Essentially, this effect depresses metabolism of cooled body tissues, thereby conserving energy. Cooling the body to increase diving time is known as adaptive hypothermia hypothesis. A depr...'Sorry, Charlie:' New news on the tuna
... different environments. One such example of this phenomenon is the tuna fish. Tunas are regional endotherms, maintaining elevated temperatures in deep red swimming muscles by way of vascular counter-current heat exchangers (retia mirabilia) that trap heat produced as a by-product of tissue metabolism. The c...Research links adolescent steroid use to reduction in serotonin, altered signaling
...loni and graduate student Jill Grimes examined the phenomenon of long-term steroid use through a series of experiments on groups of adolescent male Syrian hamsters. During adolescence, this particular breed of hamster displays a natural form of territorial aggression, has similar neurological circuitry to human...Without blue crabs, southern salt marshes wash away, study finds
...sh grass. Silliman and Bertness call this top-down phenomenon a "trophic cascade." "The discovery of this simple trophic cascade implies that over-harvesting of snail predators, such as blue crabs, may be an important factor contributing to the massive die-off of salt marshes across the southeastern United Stat...The prehistory of neotropical lowland forests
...r cycles of about 15 years. The periodic climatic phenomenon known as the El Nio/Southern Oscillation (ENSO) ha...ogical record provides evidence of changes in this phenomenon over time. Marine organisms preserved in archeological sites show that there was little or no ENSO a......tice it until afterwards," he winced. Indeed, the phenomenon of sore muscles is only one scientific morsel Vogel offers in a smorgasbord of topics covered in his book, including that facts that clams pump a ton of water to get an ounce of food forty percent of the human body is muscle the Greeks and Romans...The 'forbidden' questions on genetic testing
... a high risk of developing a particular disease a phenomenon known as "adverse selection." Now, with funding from the Wellcome Trust's biomedical ethics programme, the Cardiff-based team aims to gather evidence on the potential impact of genetic testing on insurance costs, and the interaction between genetic t...Physics tip sheet #20 July 3, 2002
...s and being reassembled slightly differently. This phenomenon has now been predicted in Bose-Einstein condensates where atoms that are fired at a BEC seem to leave before they enter. As an atom hits the BEC, it is absorbed into the collective state but still exists as a vibration. The vibration travels through ...... such an effect? "It makes no sense to me for this phenomenon to have evolved," says Satoshi Kanazawa, an evolutionary psychologist at the Indiana University of Pennsylvania. But Gallup counters that men whose semen promotes long-term mood enhancement might have more chances to indulge in sexual activity....Bacterial quorum-sensing structure solved
... human intervention in these signaling pathways, a phenomenon known as quorum sensing, either by thwarting activities of harmful bacteria or facilitating activities of helpful ones. The work is reported by researchers at Cornell University, Argonne National Laboratory and Monsanto Co. in the latest edition of t......CA3 region of the hippocampus is essential for the phenomenon called pattern completion, said Dr. Dan Johnston, professor of neuroscience at Baylor College of Medicine. That is the ability to recall memories from partial representations of the original. The scientists genetically engineered a strain of mice in...Influenza infection attracts pneumonia bacteria
...at cause pneumonia than uninfected cells, but this phenomenon can be reversed with antiviral treatment. Researchers from the University of Kansas Medical Center present their findings today at the 102nd General Meeting of the American Society for Microbiology. Bacterial pneumonia caused by Streptococcus pneumo...Studying the strength of protein bonds one molecule at a time
...inogen are regulated by the cell as an all-or-none phenomenon with only one functional state compatible with binding. The researchers also offer a new application for laser tweezers in studying the behavior of single molecules and the response of cells to mechanical forces. "Laser tweezers use the force of a fo...