沈阳治疗皮肤癣得多钱(沈阳那家医院可以看皮肤科) (今日更新中)

WASHINGTON, June 6 (Xinhua) -- A new University of Missouri study shows that the exposure to the controversial chemical Bisphenol A (BPA) through diet has been underestimated by previous lab tests.The findings were published on Monday in Environmental Health Perspectives.In the study, researchers compared BPA concentrations in mice that were given a steady diet supplemented with BPA throughout the day, compared to the more common lab method of single exposure, and found an increased absorption and accumulation of BPA in the blood of the mice.The authors continuously exposed the mice to BPA through their feed, which is considered the primary route of exposure to this chemical in animals and humans. In previous studies examining the effects of BPA, mice were exposed to BPA only through a one-time administration.Following the exposure through the diet, a significantly greater increase in the active form of BPA, which is the greatest threat as it is the form that can bind to sex steroid receptors and exert adverse effects, was absorbed and accumulated in the animals."People are primarily and unknowingly exposed to BPA through the diet because of the various plastic and paper containers used to store our food are formulated with BPA," said Cheryl Rosenfeld, associate professor in biomedical sciences and corresponding lead author. "We know that the active form of BPA binds to our steroid receptors, meaning it can affect estrogen, thyroid and testosterone function. It might also cause genetic mutations. Thus, this chemical can hinder our ability to reproduce and possibly cause behavioral abnormalities that we are just beginning to understand."The study notes that more than eight billion pounds of BPA are produced every year, and more than 90 percent of people in the United States have measurable amounts of BPA in their bodies."When BPA is taken through the food, the active form may remain in the body for a longer period of time than when it is provided through a single treatment, which does not reflect the continuous exposure that occurs in animal and human populations," said Rosenfeld. "We need to study this further to determine where the ingested BPA becomes concentrated and subsequently released back into the bloodstream to be distributed throughout the body."

BEIJING, Sept. 6 (Xinhuanet) -- NASA will launch on Thursday twin lunar orbiters built to map the gravity of Earth's moon in unprecedented detail, media reported Tuesday.The twin lunar probes, Graili-A and Graili-B, will blast off from Florida's Cape Canaveral Air Force Station at 8:37 a.m. EDT and at 9:16 a.m. EDT respectively Thursday, according to NASA.The Grail twins will travel three to four months to get to the moon under a slower but more economical plan.Artist concept of GRAIL mission. Grail will fly twin spacecraft in tandem orbits around the moon for several months to measure its gravity field in unprecedented detail.The two spacecrafts will reach the moon around New Year's Day when they will begin to probe the moon's composition from the crust to the core, according to NASA.The data collected by the probes will be used to better understand the moon's evolution and formation, NASA scientists said.Researchers will also use the twin probes to pinpoint the best landing sites for future explorations.The mission, from start to finish, costs 496 million U.S. dollars. The two Grail probes will crash into the moon after its mission.

WASHINGTON, Sept. 13 (Xinhua) -- The U.S. Department of Agriculture (USDA) announced Tuesday it will begin testing next year for six more kinds of E.coli bacteria in raw ground beef and tenderized steaks in order to protect the safety of the American food supply.The U.S. currently tests for one strain of E.coli O157:H7 in beef. According to the USDA, from March 5 next year, if the E. coli serogroups O26, O103, O45, O111, O121 and O145 are found in raw ground beef or its precursors, those products will be prohibited from entering commerce.Like E.coli O157:H7, these serogroups can cause severe illness and even death, and young children and the elderly are at highest risk."The Obama Administration is committed to protecting our food supply and preventing illnesses before they happen," said Agriculture Secretary Tom Vilsack in a statement. "Today's announcement does exactly that by targeting and eliminating contaminated products from the market.""Too often, we are caught reacting to a problem instead of preventing it. This new policy will help stop problems before they start," he said.About one in six Americans becomes sick from a food borne illnesses each year, an epidemic that kills about 3,000 annually and hospitalizes 128,000, according to the U.S. Centers for Disease Control and Prevention.

BEIJING, July 17 (Xinhua) -- China's land prices in 105 cities rose 1.87 percent on average in the second quarter over the first, but the rate of growth slowed, the China Urban Land Price Dynamic Monitor, a land price information provider, announced Sunday. < In the second quarter, land price for business properties averaged 5,506 yuan (about 847 U.S. dollars) per square meter, up 2.77 percent from the previous quarter. The growth rate slowed by 0.56 percentage points.Land price for residential properties averaged 4,443 yuan per square meter, up 2.17 percent. The growth slowed by 0.27 percentage points. The price for industrial uses, meanwhile, was up 1.13 percent to reach 645 yuan per square meter. The growth fell 0.3 percentage points.The country's three most prosperous regions, the Yangtze River Delta Region, Pearl River (Zhujiang) Delta Region, and the Bohai Rim, all reported slower land price growth in the second quarter.

WASHINGTON, June 7 (Xinhua) -- Salmonella infections have not decreased during the past 15 years and have instead increased by 10 percent in recent years in the United States, according to a report released Tuesday by the Centers for Disease Control and Prevention (CDC).During the same time period, illnesses from the serious Shiga toxin-producing E. coli O157 have been cut nearly in half and the overall rates of foodborne infections have been reduced by 23 percent, the new Vital Signs report said.The report summarizes 2010 data from CDC's Foodborne Diseases Active Surveillance Network (FoodNet), which serves as America's report card for food safety by tracking whether nine of the most common infections transmitted through foods are increasing or decreasing."Although foodborne infections have decreased by nearly one-fourth in the past 15 years, more than one million people in this country become ill from Salmonella each year, and Salmonella accounts for about half of the hospitalizations and deaths among the nine foodborne illnesses CDC tracks through FoodNet," said CDC Director Thomas Frieden in a statement.In 2010, FoodNet sites, which include about 15 percent of the American population, reported nearly 20,000 illnesses, 4,200 hospitalizations and 68 deaths from nine foodborne infections. Of those, Salmonella caused more than 8,200 infections, nearly 2,300 hospitalizations and 29 deaths (54 percent of the total hospitalizations and 43 percent of the total deaths reported through FoodNet). CDC estimates that there are 29 infections for every lab-confirmed Salmonella infection.Salmonella, which is responsible for an estimated 365 million U.S. dollars in direct medical costs each year in the United States, can be challenging to address because so many different foods like meats, eggs, produce, and even processed foods, can become contaminated with it and finding the source can be challenging because it can be introduced in many different ways.In response to that challenge, the U.S. Food and Drug Administration, which regulates eggs, produce and many processed foods, has developed new rules for the egg industry to follow under its recently expanded regulatory authorities.The rate of E. coli O157 cases reported by FoodNet was two cases per 100,000 people in 1997 and, by 2010, had decreased to 0.9 cases per 100,000 people. The CDC credits the reduction in E. coli to improved detection and investigation of outbreaks, cleaner slaughter methods, better inspections of ground beef processing plants, and increased awareness by consumers and restaurant employees of the importance of properly cooking beef.

来源：资阳报