Friday, May 17, 2013

New salt study: We're still drowning in salt

New salt study: Despite warnings from the CDC, most producers of fast foods and processed foods didn't lower the salt content in their foods between 2005 and 2001, say researchers.

By Rachael Rettner,?My Health News Daily Senior Writer / May 14, 2013

Boston Market restaurants, like this one seen today in Alexandria, Va., have removed salt shakers from restaurant tables and placed them with other condiments on the beverage dispenser table. Most Americans still eat way too much salt, says a new study, not just from salt shakers but because of sodium in processed foods.

Cliff Owen / AP

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Despite recent calls for food manufacturers to cut back on salt in their products, sodium levels in processed and restaurant foods have changed little in recent years, a new salt study suggests.

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The study, conducted by the advocacy organization Center for Science in the Public Interest, reviewed the sodium content of 402 processed foods sold at supermarkets, and 78 fast foods sold at chain restaurants.

Between 2005 and 2011, the sodium content of processed foods declined, on average, by 3.5 percent, and the sodium content of fast foods increased by 2.6 percent. Both of these changes were so small that they could have been due to chance, said study researcher Dr. Stephen Havas, a professor of preventive medicine at Northwestern University Feinberg School of Medicine.

Currently, 9 in 10 Americans eat too much salt, according to the Centers for Disease Control and Prevention. The government recommends people limit their salt intake to 2,300 milligrams per day. (For those who are 51 years or older, African-American, have high blood pressure, diabetes or chronic kidney diseases, the recommendation is 1,500 mg per day.)

"That?s nearly impossible for people to do right now, given how much salt is in restaurant and processed foods," Havas said. The average American takes in about 3,300 milligrams of sodium per day. Too much sodium in the diet raises blood pressure, which is a risk factor for heart disease and stroke, the CDC says.

Overall, the amount of salt we consume from processed and fast foods needs to decline by at least 50 percent to have benefits for people's health, Havas said. (Most of the salt we consume is through processed and fast foods, and not from a salt shaker, the researchers say.)

The new findings suggest that change happens too slowly when the food industry is asked to voluntarily reduce the sodium content of its foods, Havas said. Instead, the Food and Drug Administration should take steps to limit the amount of sodium allowed in different categories of food, he said.

High sodium foods

Some of the saltiest foods in the study were smoked bacon (1,803 mg of sodium per 100-gram serving), Caesar salad dressing (1,079 mg) and hot dogs (927 mg).

And a fast food meal of chicken strips and fries contained, on average, 1,239 mg of salt in 2011.

The study did not include products labeled as low sodium or sodium-free because the intent of the study was to focus on regular foods that had ample opportunity to reduce sodium levels between 2005 and 2011.

The researchers found wide variation in sodium levels in fast food. For instance, a medium serving of Burger King french fries had nearly twice the sodium as a medium serving of McDonald's french fries (670 mg versus 270 mg per 100 g serving).

Source: http://rss.csmonitor.com/~r/feeds/science/~3/-C2tKA72RN8/New-salt-study-We-re-still-drowning-in-salt

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How Einstein's theory of special relativity helped find a new planet (+video)

To find the planet, astronomers used Einstein's theory as it pertains to the intensity of a beam of light. The method could add more exoplanets to a growing list, no 'wobble' or 'transit' required.

By Pete Spotts,?Staff writer / May 14, 2013

Kepler space telescope is designed to search for Earth-like planets in the Milky Way galaxy. The telescope has been in space since 2009, but scientists keep finding new ways to use it ? even using special relativity ? to find extra-solar planets.

Courtesy of NASA / AP

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With a little help from Einstein's theory of special relativity, astronomers have discovered a planet orbiting a star some 2,000 light-years away using a new approach that was barely a gleam in its proposers' eyes a decade ago.

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The planet is a bit larger and about twice as massive as Jupiter. It orbits its sun-like star once every 1.5 days. The team making the discovery estimates the planet's temperature at a searing 3,600 degrees Fahrenheit.

On one level, such "hot Jupiters" are a dime a dozen these days. Because they are massive and close to their host stars, they are the easiest planets to spot with virtually every planet-hunting technique astronomers have used to date.

What sets this discovery apart, however, is that the planet is the first to have been found through a process that in some ways could simplify planet hunting, researchers say. Its effectiveness is limited to big planets orbiting close to their stars, the team reporting the discovery acknowledges.

But it also holds out the hope of finding such planets when the parent stars may be too faint for other, currently used techniques. This opens the possibility of adding many more extra-solar planets to a catalog that now tops 800 of them.

No need to hunt for the wobble a planet's gravity imparts to its star's spectrum. No need to wait for a planet to pass in front of its star, known as a transit.

Instead, the team looked for a combination of three relatively small effects that wax and wane throughout a planet's orbit around a star. This delivers a different signal to a planet-hunting device like NASA's Kepler spacecraft than the eclipsing planet, or transit method, delivers, notes David Latham, an astronomer at the Harvard-Smithsonian Center for Astrophysics and a member of the team discovering the planet.

"The transits last just a short time, just a couple of hours," Dr. Latham writes in an e-mail. But the effects the team tracked "rise and fall continuously through the entire orbital period of the planet, roughly 36 hours, so it?s not hard to distinguish these phenomena."

And it can detect planets that don't transit their stars.

The approach was conceived 10 years ago by Harvard University astrophysicist Avi Loeb and Scott Gaudi, now an assistant professor of astronomy at The Ohio State University in Columbus, who took a cue from Albert Einstein.

One prediction of Einstein's theory of special relativity is that when an object is moving at a pace close to the speed of light, any light it emits appears more intense along the object's line of motion, forming a beam. To an observer watching the object approach, the light looks brighter than it would if the object were stationary.

The effect is most pronounced in powerful astronomical events such as gamma-ray bursts, in which matter emitting the gamma rays is accelerated to 99.9 percent of the speed of light, Dr. Loeb explains.

Indeed, to an astronomer looking directly into the beam, the effect can lead to the illusion that the light is traveling faster than its 186,000-mile a second speed limit. Such beams emanate from the poles of supermassive black holes that have gone on feeding binges. Researchers call them superluminal jets.

Source: http://rss.csmonitor.com/~r/feeds/science/~3/bF2TBtyKJE8/How-Einstein-s-theory-of-special-relativity-helped-find-a-new-planet-video

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ZTE Grand X 2 In announced, launch scheduled for Q3

Grand X 2 INSecond-generation Intel handset from ZTE, running Atom Z2580 CPU

ZTE has announced a new Intel Atom-powered smartphone, the Grand X 2 In. The somewhat clumsily-named handset is the successor to last year's Grand X IN, which saw a limited global release late last year.

It's powered by a 2GHz Intel Atom Z2580 CPU -- that's CloverTrail+ for those of you keeping track of platforms. The x86 number-cruncher is backed up by 1GB of RAM and 8GB of internal storage, expandable via microSD. On the front there's a 4.5-inch 720p display and 1-megapixel front-facing camera, around the back an 8-megapixel camera.

On the software side you're looking at "Android Jelly Bean" -- we're guessing 4.1, since ZTE isn't saying which exact version is on there. That's lightly skinned with ZTE's own MIUI-like user interface.

The ZTE Grand X In 2 is due for release in Europe during the third quarter.

Source: Press Release

    


Source: http://feedproxy.google.com/~r/androidcentral/~3/iN3IMu3SRYE/story01.htm

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Thursday, May 16, 2013

Women's immune systems remain younger for longer

May 15, 2013 ? Women's immune systems age more slowly than men's, suggests research in BioMed Central's open access journal Immunity & Ageing. The slower decline in a woman's immune system may contribute to women living longer than men.

Researchers looked at the blood of healthy volunteers in Japan, ranging in age between 20 and 90 years old; in both sexes the total number of white blood cells per person decreased with age. The number of neutrophils decreased for both sexes and lymphocytes decreased in men and increased in women. Younger men generally have higher levels of lymphocytes than similarly aged women, so as aging happens, the number of lymphocytes becomes comparable.

Looking in more detail it became apparent that the rate in decline in T cells and B cells was slower for women than men. Both CD4+ T cells and NK cells increased with age, and the rate of increase was higher in women than men. Similarly an age-related decline in IL-6 and IL-10 was worse in men. There was also a age-dependent decrease in red blood cells for men but not women.

This difference in the aging of immune systems between men and women is one of many processes which alter as we grow older. Prof Katsuiku Hirokawa from the Tokyo Medical & Dental University Open Laboratory explained, "The process of aging is different for men and women for many reasons. Women have more oestrogen than men which seems to protect them from cardiovascular disease until menopause. Sex hormones also affect the immune system, especially certain types of lymphocytes. Because people age at different rates a person's immunological parameters could be used to provide an indication of their true biological age."

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The above story is reprinted from materials provided by BioMed Central Limited, via AlphaGalileo.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Katsuiku Hirokawa, Masanori Utsuyama, Yoshio Hayashi, Masanobu Kitagawa, Takashi Makinodan and Tamas Fulop. Slower immune system aging in women versus men in the Japanese population. Immunity & Ageing, 2013; 10: 19

Note: If no author is given, the source is cited instead.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/most_popular/~3/Fq7AXrngPX0/130514213056.htm

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Groundwater isolated for eons

At least 1.5 billion years after it last saw the surface, flowing liquid may host life

At least 1.5 billion years after it last saw the surface, flowing liquid may host life

By Erin Wayman

Web edition: May 15, 2013

Drilling more than two kilometers into the ground beneath Canada, geologists have struck scientific gold: pockets of flowing water isolated underground for at least 1.5 billion years and perhaps as long as 2.64 billion years.

The water is rich in hydrogen and methane, which nourish microbes living today near hydrothermal vents on the seafloor. That means the deposits may harbor ancient lineages of life cut off from the surface for eons, the researchers report in the May 16 Nature.

Although the water has not yielded any evidence of life to date, the researchers intend to start looking. And because ancient rocks on Mars share a similar mineral composition, the finding suggests that the Red Planet could also be home to deeply buried life, says coauthor Barbara Sherwood Lollar, a geochemist at the University of Toronto.

The study ?makes a good case that if there was ever a biosphere on Mars, then tiny remnants of that biosphere are very likely preserved underground,? says planetary scientist Chris McKay of NASA Ames Research Center in Moffett Field, Calif. But he doesn?t expect imminent confirmation of that proposition. ?Considering that after 40 years of Mars exploration we have managed to drill only a few centimeters, it may be a long time before we can follow up on this idea.?

The discovery comes from boreholes drilled in an Ontario zinc and copper mine. The water is in fractures in rocks that were part of the seafloor roughly 2.7 billion years ago. Over time, volcanic eruptions and other geologic activity buried the rocks and trapped the water.

Sherwood Lollar and colleagues embarked on their Ontario research after discovering water in a South African gold mine that had been separated from the surface for up to 25 million years and contained microbes that were living off hydrogen and methane produced by chemical reactions between the water and rock. Some of the microbes were related to bacteria found near hydrothermal vents; others didn?t resemble any known lineages, Sherwood Lollar says.

The team searched in Ontario because of the rocks? antiquity, but the researchers didn?t expect to find water billions of years old. ?I?m not sure I believed the results to begin with,? says coauthor Christopher Ballentine, a geochemist at the University of Manchester in England.

Before the discoveries in South Africa and Canada, geologists had routinely found traces of ancient water trapped in microscopic bubbles in minerals. But researchers had never found flowing water that old. Sherwood Lollar doesn?t know how much water is trapped deep in the crust at the Canadian site. But at one of the boreholes, water flowed up over several years at rates as high as 400 milliliters per minute.?

The researchers determined the water?s age through several analyses of noble gases dissolved in the fluid. For example, the composition of different xenon forms, or isotopes, matched the expected mix in Earth?s early atmosphere.

The water was probably preserved because this region of Canada has experienced little tectonic activity that would disturb rocks, Ballentine says. Similar pockets of water might exist in any rocks this ancient, which occur worldwide, adds Steven Shirey, a geochemist at the Carnegie Institution for Science in Washington, D.C. ?That?s what?s so exciting,? he says. ?If it could happen here, it could happen any place.?


J. Raloff. Life found deep below Antarctic ice. Science News. Vol. 183, March 9, 2013, p. 12. [Go to]

A. Witze. Deep life. Science News. Vol. 181, February 11, 2012, p. 18. [Go to]

A. Witze. Buried microbes coax energy from rock. Science News Online, February 8, 2011. [Go to]

S. Perkins. Seafloor chemistry: life?s building blocks made inorganically. Science News. Vol. 173, February 2, 2008, p. 67. [Go to]

Source: http://www.sciencenews.org/view/generic/id/350394/title/Groundwater_isolated_for_eons

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Puff on a Par 4 with this Sneaky Tee Weed Pipe

Just because your ball's not on the green doesn't mean you can't be. But rather than spark an obvious J on the front nine, be a little more discreet by smoking out of the Pitch-N-Puff.

The golf tee-shaped pipe is constructed of brass, powder coated, and retails for $10 online. While you probably could tee off on the Pitch-n-Puff, it'd be better not to given that the mouthpiece is the same end that you press into the dirt. [Pitch-n-Puff]

Source: http://gizmodo.com/puff-on-a-par-4-with-this-sneaky-tee-weed-pipe-505783947

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Hangouts app now available in the Play Store, comes as update to Google Talk

Hangouts

Google's new cross-platform group messaging service is pushing out to devices

Hangouts, the long-rumored messaging service from Google that pulls together text, photo, video and group chat all into one service, is pushing out in the Play Store today as an update to the Google Talk app. The app is a serious departure from the old-school design found on talk, with an all new layout that focuses first on conversations and then on individual contacts. The main screen is a list of your different ongoing conversations -- "Hangouts" -- with pictures of the people involved in them. When you start a new hangout you can search people by name, email, circle or even phone number and start a chat.

Right now it looks like it's basically building on just the previous Talk system of chatting, and although it does ask to confirm your phone number and you can search contacts by their numbers, there's no SMS support here just yet. Go grab a download of the new Hangouts app from the Play Store link above.

    


Source: http://feedproxy.google.com/~r/androidcentral/~3/Acdw4tm3ZFQ/story01.htm

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