रविवार, जून 30, 2013
प्रस्तुतकर्ता kshitij पर 1:18:00 am
मंगलवार, जून 25, 2013
प्रस्तुतकर्ता kshitij पर 5:35:00 am
Scientists have found a novel way to attack the drug resistant bacteria that cause eye infections resulting in blindness. The study led by Daniel Kadouri, an assistant professor of oral biology at the University of Medicine and Dentistry of New Jersey had three major components. The first established that isolates of two antibiotic-resistant ocular pathogens, Pseudomonas aeruginosa and Serratia marcescens, were all susceptible to being attacked and killed by at least one of two other bacteria, Micavibrio aeruginosavorus and Bdellovibrio baceriovorus. The latter two bacteria act as predators against the pathogens but are believed to be "good," or non-infectious, bacteria when they exist within the human body, researchers said. In the second phase, human corneal-limbic epithelial cells that are native to the eye were exposed in vitro to M aeruginosavorus and B baceriovorus to test whether those "good" predator bacteria would cause either toxicity or inflammation in those cells, which they did not. In the third phase, the two "good" predator bacteria were injected into live worms from the species Galleria mellonella, which is well established as a suitable to test the toxicity of various microbes as well as a live organism's innate immunity to those microbes. here injection of the pathogenic bacterium aeruginosa as a positive control was one hundred per cent fatal to the worms, other worms injected with the two "good" predator bacteria had 11-day survival rates between 93.3 and 100 per cent, a strong sign that the "good" bacteria were not toxic to the worms. In addition a lack of change in larval pigmentation following injection suggested that the "good" bacteria also did not provoke an aggressive innate immune response in the worms. "Taken together, our findings leave us confident that, in isolation, pathogenic bacteria are susceptible to successful attack by predator bacteria, predator bacteria do not appear inherently harmful to ocula r cells when applied topically, and a live organism can tolerate the predator bacteria well," said Kadouri. "The time to test all three phenomena simultaneously in the eye tissue of a live organism may now be at hand," Kadouri said.
प्रस्तुतकर्ता kshitij पर 5:31:00 am
रविवार, जून 09, 2013
High heels may cause permanent injury, with most women suffering pain in just over an hour of wearing height-enhancing footwear, a new study has found. Wearing the ill-fitted shoes can cause long-term damage including arthritis, stress fractures, and trapped nerves, which may even require surgery or steroid injections, consultant podiatrist Mike O'Neill warned. Researchers at The College of Podiatry, UK, found that almost half of women have suffered foot problems after wearing an uncomfortable pair of shoes, but 43 per cent will suffer in the name of fashion. One third of women also admitted that they had worn heels they knew did not fit, simply because they "looked nice" - and could not find a pair in their size, The Telegraph reported. On average, high heels start to hurt after 1 hour, 6 minutes and 48 seconds, but a fifth 20 per cent started to feel the pinch within just 10 minutes. As many as 28 per cent women said they have resorted to dancing bare foot in a nightclub or bar when they could not put up with the pain any longer. One third of them admitted to have been forced to remove their shoes and walk home barefoot because they could not bear the pain any longer. The study of 2,000 British adults also found that only 12 per cent of men have put up with stylish but uncomfortable shoes. Researchers said that could explain why women are likely to have more issues with their feet, and are twice as likely to suffer from corns, cracked heels and bunions. A staggering 90 per cent of women have experienced problems and 20 per cent admitted they are "embarrassed" by their feet while 12 per cent are so ashamed they cover them constantly. As many as 19 per cent of women have refused to seek help despite these problems, because they believed their foot complaint was unimportant. Researchers said it appears younger women are more likely to be doing themselves harm as the younger the woman, the higher their heels. 20 per cent of those aged 18 to 24 owned a pair of six inch heels.
प्रस्तुतकर्ता kshitij पर 5:15:00 am
शुक्रवार, जून 07, 2013
onsuming cheese and other dairy products may help protect teeth against cavities, a new study led by an Indian-origin researcher has claimed. onsuming dairy products is vital to maintaining good overall health, and it is especially important to bone health. However, there has been little research about how dairy products affect oral health in particular. The new study published in the General Dentistry, the peer-reviewed clinical journal of the Academy of General Dentistry (AGD), sampled 68 subjects ranging in age from 12 to 15, and the authors looked at the dental plaque pH in the subjects' mouths before and after they consumed cheese, milk, or sugar-free yogurt. A pH level lower than 5.5 puts a person at risk for tooth erosion, which is a process that wears away the enamel (or protective outside layer) of teeth. "The higher the pH level is above 5.5, the lower the chance of developing cavities," said Vipul Yadav, lead author of the study. The subjects were assigned into groups randomly. Researchers instructed the first group to eat cheddar cheese, the second group to drink milk, and the third group to eat sugar-free yogurt. Each group consumed their product for three minutes and then swished with water. Researchers measured the pH level of each subject's mouth at 10, 20, and 30 minutes after consumption. The groups who consumed milk and sugar-free yogurt experienced no changes in the pH levels in their mouths. Subjects who ate cheese, however, showed a rapid increase in pH levels at each time interval, suggesting that cheese has anti-cavity properties. The study indicated that the rising pH levels from eating cheese may have occurred due to increased saliva production (the mouth's natural way to maintain a baseline acidity level), which could be caused by the action of chewing. Additionally, various compounds found in cheese may adhere to tooth enamel and help further protect teeth from acid.
प्रस्तुतकर्ता kshitij पर 5:55:00 am