Washington, Aug 3 : In television classic "I Love Lucy", Ricky Ricardo switched into rapid-fire Spanish whenever he was upset, despite the fact that Lucy had no idea what her Cuban husband was saying.
This kind of code-switching, or switching back and forth between different languages, happens all the time in multi-lingual environments, and often in emotive situations.
Psychological scientists Stephen Chen and Qing Zhou of the University of California, Berkeley, and Morgan Kennedy of Bard College, have sought to demystify this linguistic phenomenon, the journal Perspectives on Psychological Science reports.
Washington, Aug 3 : Scientists are beginning to understand one of life's enduring mysteries - why women live, on average, longer than men.
The study led by Monash University, describes how mutations to the DNA of the mitochondria can account for differences in the life expectancy of males and females. Mitochondria, which exist in almost all animal cells, are vital for life because they convert our food into the energy that powers the body.
Washington, August 3 : Researchers have discovered a molecule that converts stem cells into heart cells, which could be used to replace diseased or damaged tissue in patients suffering from heart disease.
Researchers at Sanford-Burnham Medical Research Institute (Sanford-Burnham), the Human BioMolecular Research Institute, and ChemRegen, Inc. have been searching for molecules that convert stem cells to heart cells for about eight years-and now they've found one.
Washington, August 2 : A new study including Indian-origin researchers have raised concern about chronic exposure of workers in industry to a food flavouring ingredient used to produce the distinctive buttery flavour and aroma of microwave popcorn, margarines, snack foods, candy, baked goods, pet foods and other products.
They found evidence that the ingredient, diacetyl (DA), intensifies the damaging effects of an abnormal brain protein linked to Alzheimer's disease.
Washington, August 2 : A new study has turned down a conventional wisdom, which holds that the fastest swimming sperm are most likely to succeed in their quest to fertilize eggs.
The study of sperm competition in fruit flies (Drosophila melanogaster) found that slower and/or longer sperm outcompete their faster rivals in sexual reproduction.
A team of scientists led by corresponding author Stefan Lupold, a post-doctoral researcher in the Department of Biology in the College of Arts and Sciences used fruit flies that were genetically altered so that the heads of their sperm glow fluorescent green or red under the microscope.
Washington, August 2 : Wild marine fish populations in Great Barrier Reef, which exists directly beneath the world''s largest ozone hole, have been inflicted with widespread skin cancer, a new report has revealed.
This is the very first incidence of melanoma being diagnosed in the coral trout.
According to Dr Michael Sweet, who is heading the collaborative study between Newcastle University and the Australian Institute of Marine Science, the appearance of the melanoma is almost identical to that found in humans.
Washington, August 2 : Researchers suggest caffeine, which is widely consumed around the world in coffee, tea and soft drinks, may help control movement in people suffering from Parkinson's.
The finding of a study conducted at the Research Institute of the McGill University Health Centre (RI MUHC) opens the door to new treatment options for Parkinson's disease that affects approximately 100 000 Canadians.
Washington, August 2 : Scientists may have found factors that distinguish the brains of the exceptionally smart persons from those of average individuals.
As science has long suspected, overall brain size matters somewhat, accounting for about 6.7 percent of individual variation in intelligence.
More recent research pinpointed the brain's lateral prefrontal cortex, a region just behind the temple, as a critical hub for high-level mental processing, with activity levels there predicting another 5 percent of variation in individual intelligence.
Washington, Aug 2 - Four people have died in the US after being infected with the West Nile virus, Xinhua reported.
The deaths were among 241 cases of West Nile virus infection detected in 42 states so far this year, the Centers for Disease Control and Prevention (CDC) said Wednesday.
Almost 80 percent of the cases were reported from Texas, Mississippi and Oklahoma.
The West Nile virus is transmitted to people by infected mosquitoes. In the US, most people are infected from June-September. West Nile cases usually peaks in mid-August.
Washington, August 1 : Sometimes even skilled professionals forget to perform a simple task they have executed without difficulty thousands of times before, leading to disastrous consequences.
These kinds of oversights occur in professions as diverse as aviation and computer programming, but research from psychological science reveals that these lapses may not reflect carelessness or lack of skill but failures of prospective memory.
Washington, August 1 : In addition to a host of other physical and psycho-social concerns, childhood obesity could be related to growing problems with infertility, say researchers.
In a recent review, scientists suggested that childhood obesity could be disrupting the timing of puberty and ultimately lead to a diminished ability to reproduce, especially in females.
Human bodies may be scrambling to adjust to a problem that is fairly new. For thousands of years of evolution, poor nutrition or starvation, were a greater concern, rather than an overabundance of food.
Washington, Aug 1 : Ever wonder why extremely capable surgeons leave scissors in the patient's gut, after successfully concluding a difficult operation? It's not carelessness but failure of prospective memory, according to a US study.
R. Key Dismukes, scientist at the NASA Ames Research Centre, highlights various ways in which the nitty-gritty of daily tasks interacts with the normal cognitive processes, to produce memory failures that sometimes have disastrous consequences, the journal Current Directions in Psychological Science reports.
Washington, August 1 : Some herbal agents, taken orally or applied topically, can prevent sunburn and limit the damage caused by excessive exposure to ultraviolet (UV) light, according to a recent research.
The study specifically identifies golden serpent fern (Phlebodium aureum or Polypodium leucatomos) and Asian ginseng (Panax ginseng) as herbal products that, when taken orally, may reduce the local and systemic negative effects of UV light exposure, including photoaging, increased risk of skin cancer, and harm done to immune system function.
Washington, August 1 : Asthma and airway hyper-responsiveness are the most common chronic conditions among Olympic athletes, and could be related to intense training, according to a study by the University of Western Australia.
The results were based on data from the last five Olympic games.
In summer and winter sports there is widespread suffering from asthma and airway hyper-responsiveness (AHR) among athletes who take part in endurance sports. Its relatively late onset in many older athletes suggests to the experts that the years of intense training could be one of the causes.
Washington, August 1 : It is possible that more-virulent strains of malaria might evolve if a malaria vaccine goes into widespread use, researchers at Penn State University say.
They found that malaria parasites evolving in vaccinated laboratory mice become more virulent.
The mice were injected with a critical component of several candidate human malaria vaccines that now are being evaluated in clinical trials.