阴道镜模拟训练系统多少钱(杭州开放式肤性病学多媒体教学系统) (今日更新中)

LOS ANGELES, June 4 (Xinhua) -- Pregnant women who eat high-fat diet may be more likely to have a higher rate of stillbirth, a new study suggests.Researchers at Oregon Health & Science University (OHSH) came to the conclusion after observing 24 pregnant Japanese macaques that ate either a diet comprising 32 percent calories from fat or a control diet with 14 percent fat calories for at least four years.The researchers found the monkeys that ate a high-fat diet experienced a significant decrease in blood flow from the uterus to the placenta, a reduction of 38 percent to 56 percent, and a rise in placental inflammation.This was the case regardless of whether the monkeys were obese or slender. The risk of stillbirth was further compounded, however, when the monkeys were obese with hyper-insulinemia, or pre-diabetes.A large order of McDonald's french fries are shown May 22, 2008. McDonald's has switched to cooking oils free of trans fats in all of its restaurants in the United States and Canada, Chief Executive Jim Skinner said on may 23Eating a high-fat diet decreases blood flow from the mother to the placenta, the temporary organ that nourishes the unborn fetus, thus raising the risk of stillbirth, the researchers explained.Because the placental structure of the Japanese macaque is very similar to that in humans, cause and effect can be better established, the researchers said.Additional studies are needed to determine exactly how a high- fat diet decreases placental blood flow, the researchers noted.This is the first study to explain exactly how a fatty diet contributes to stillbirth, the researchers said in the study appearing in the June edition of the journal Endocrinology.The researchers hope their work will inform expectant moms and their physicians about the inherent dangers of a high-calorie, high- fat diet."This study demonstrates that maternal diet during pregnancy has a profound influence on both placental and fetal development," said Antonio Frias, M.D., principal investigator and assistant professor of obstetrics and gynecology (perinatology/maternal-fetal medicine) in the OHSU School of Medicine."The high-calorie, high-fat diet common in our society has negative effects on placental function and may be a significant contributor to adverse pregnancy outcomes, such as stillbirth."Previous studies have shown that nearly all adverse outcomes during pregnancy -- abnormal fetal growth, preeclampsia, preterm labor and stillbirth -- are in some way associated with an abnormally developed, or damaged, placenta, the temporary organ that nourishes the unborn fetus.In addition, maternal obesity has been associated with placental inflammation and dysfunction and an increased risk of stillbirth.Taking these findings into account, the researchers hypothesized that eating a diet high in fat during pregnancy also may increase the risk of placental inflammation and the risk of stillbirth.The researchers said they plan to conduct further studies on the impact of dietary changes and diet supplementation on improving outcomes in both monkeys and humans.

PARIS, June 14 (Xinhua) -- Solar Impulse, a Swiss solar-powered aircraft, finally arrived in Paris on Tuesday after three days' delay, ready for a debut at the biennial International Paris Air Show.The 1.6-ton solar-powered plane was expected to land in Paris on Saturday but technical problems and bad weather forced it to turn back to Brussels.The plane took its first international flight from Switzerland to Brussels on May 13 and then marked its second international flight to Paris. It has 12,000 solar cells mounted on the wings, which provide momentum for its four electric motors.Solar Impulse is the first aeroplane designed to fly day and night without requiring fuel and without producing carbon emission. The 64-meter-wingspan (as wide as an Airbus A340) can fly at extremely slow speed and has a weight equivalent to that of an average family car.Regarded as a "special guest" in the show, Solar Impulse made a historic 26-hour day and night flight without fuel in July 2010.During the Paris air show from 20 to 26 June, visitors can enjoy a close look at the innovative plane on ground every day and if weather condition permits, flying displays will take place.According to Paris Air Show organizers, 59 of the top 100 companies in the air industry worldwide will be present. More than 1,800 small and medium-sized companies will be exhibiting their products during the one-week show. Enditem

SAN FRANCISCO, Aug. 23 (Xinhua) -- The amount of malware targeted at devices based on Google's Android platform surged 76 percent in the second quarter over the previous three months in 2011, making it the most attacked mobile operating system, computer security firm McAfee said on Tuesday.A new McAfee study found that in the second quarter, Android- based malware surpassed Nokia's Symbian as the most popular target for mobile malware developers.While Symbian and Java ME, a platform designed for mobile devices and other embedded systems, remain the most targeted to date, the rapid rise in Android malware indicates that the platform could become an increasing target for cyber criminals McAfee said.Models pose with the new Samsung Galaxy S Android smartphone during its launch ceremony at the headquarters of Samsung Electronics in Seoul in this June 8, 2010 file photograph.It warned that the attacks on Android platform could affect everything from calendar apps, to text messages, and even a fake Angry Birds updates.According to the study, malware on mobile platforms is increasing steadily, often mimicking the same code as personal computer-based threats, as vast amount of personal and business data are now found on user's smartphones and other mobile devices."This year we've seen record-breaking numbers of malware, especially on mobile devices, where the uptick is in direct correlation to popularity," Vincent Weafer, senior vice president of McAfee Labs, said in a statement."Overall attacks are becoming more stealth and more sophisticated, suggesting that we could see attacks that remain unnoticed for longer periods of time," he noted.

BEIJING, June 7 (Xinhuanet) -- Sony Corp. on Monday unveiled its next generation portable gaming device, PlayStation Vita.The new PlayStation Vita will go on sale for 249 U.S. dollars, or 299 dollars for a 3G mobile version, starting in the holiday season, the Japanese electronics giant's No. 2 executive Kazuo Hirai told reporters on the eve of the E3 games convention.The device will allow gamers to be connected with one another over cellphone networks and Wi-Fi hotspots, and use GPS location-tracking technology. In the U.S., Sony is partnering exclusively with AT&T Inc. for cellphone service.Company executives have called the device Sony's biggest product launch since the PlayStation 3 five years ago."PlayStation Vita will revolutionize the portable entertainment experience," said Hirai. "The whole world is really in play."The handheld has front and back cameras, a touchscreen in front, a touch pad on the back and two knob-like joysticks. It will enable gamers to play against people using PlayStation 3 consoles over the Internet-based PlayStation Network.

CANBERRA, Aug. 29 (Xinhua) -- An Australia report released on Monday draws a direct link between inaction on climate change and long-term social and mental health problems.The Climate Institute report, A Climate of Suffering: The Real Cost of Living with Inaction on Climate Change, points that in the wake of extreme weather in Australia, such as cyclones and droughts, there is an increase in depression, anxiety, post- traumatic stress and substance abuse.As many as one in five people reported "emotional injury, stress and despair" in the wake of these events.The report also warns continuing catastrophic weather events are creating anxiety and insecurity for children at levels not seen since the Cold War.It claims one in 10 children of primary school age showed symptoms of post-traumatic stress disorder after Cyclone Larry in 2006.According to Professor Ian Hickie, from the Brain & Mind Institute, regional and remote communities are most vulnerable to the impact of climate change.He said a recent study of rural New South Wales where, following the long drought, self-harm and suicide rose by up to eight percent."I think what we are seeing now is a much more significant counting of not just the short-term costs and reactions but the longer-term costs, the loss of community cohesion and that being essential to people's long-term mental health," Professor Hickie."The drought was a particularly instructive event for everyone in Australia and we saw a lot of focus for the first time on the mental health effects, particularly suicides in rural families, the effect on rural communities of prolonged examples of weather change," Hickie said.Climate Institute chief executive John Connor said that not only did natural disasters cost taxpayers about nine billion U.S. dollars last year, but there are also damaging Australia's social fabric.He said that with Australian regions increasingly exposed to extreme weather, recognizing and managing the risks of climate change is essential, and it is an insurance policy to protect Australia's communities.The study came as the political and social debate over Australian federal government's proposed carbon tax intensifies.In 2007, a report by the Commonwealth Scientific and Industrial Research Organization (CSIRO) projected the effects of various greenhouse gas emission scenarios for 2030, 2050 and 2070.It said droughts were likely to become more frequent, fire danger was set to increase and tropical cyclones were likely to become more intense.

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