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3 Surprising Ways to Keep Your Teeth Healthy

May 31st, 2008 by Mylo

In addition to brushing and flossing, a healthful diet (with natural or added fluoride) protects teeth from decay and keeps the gums healthy. Read on to discover how to keep your smile safe and strong.

Tooth decay (cavities and dental caries) and gum disease are caused by colonies of bacteria that constantly coat the teeth with a sticky film called plaque. If plaque is not brushed away, these bacteria break down the sugars and starches in foods to produce acids that wear away the tooth enamel. The plaque also hardens into tartar, which can lead to gum inflammation, or gingivitis.

A well-balanced diet provides the minerals, vitamins, and other nutrients essential for healthy teeth and gums. Fluoride, occurring naturally in foods and water, or added to the water supply, can be a powerful tool in fighting decay. It can reduce the rate of cavities by as much as 60 percent. Read the rest of this entry »

Bioscientists photoshop their cultures to fake results

May 31st, 2008 by Mylo

Jeff sez, “Researchers often use Photoshop to clean up the images they produce in the laboratory. If the experiment didn’t go quite right, a bit of tampering can make a gel look like things did work. Editors at Science, Nature, and other journals are turning into detectives, using new tools to hunt for fraudulent images.”

And the level of tampering they find is alarming. “The magnitude of the fraud is phenomenal,” says Hany Farid, a computer-science professor at Dartmouth College who has been working with journal editors to help them detect image manipulation. Doctored images are troubling because they can mislead scientists and even derail a search for the causes and cures of disease.

Ten to 20 of the articles accepted by The Journal of Clinical Investigation each year show some evidence of tampering, and about five to 10 of those papers warrant a thorough investigation, says Ms. Neill. (The journal publishes about 300 to 350 articles per year.)

Scientists heat matter to hotter than surface of the Sun

May 31st, 2008 by Mylo

The milestone in the field of high energy density physics has been reached by an international team from Japan, the EU and the US working at the Rutherford Appleton Laboratory

Previously only ultra-thin layers of matter (less than one hundredth of a millimetre in thickness) had been heated to similar temperatures and this milestone, where 20 times greater volumes have been heated, takes scientists one step closer to laser fusion, the process that powers the Sun.

The Vulcan laser concentrated power equivalent to 100 times the world’s electricity production into a tiny spot for a fraction of a second as part of an effort that will also help scientists to explore many astronomical phenomena in miniature, such as mini-supernovas and tabletop stars. Read the rest of this entry »

Apple Releases Mac OS X 10.5.3

May 28th, 2008 by Mylo

Apple released the Mac OS X 10.5.3 update today. The latest update to Leopard should appear in your Mac OS X Software Update.

The 10.5.3 Update is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac.

For detailed information on this update, please visit this website: http://support.apple.com/kb/HT1141.
For detailed information on security updates, please visit this website: http://support.apple.com/kb/HT1222.

Apple details the many fixes in their support document. Some highlights include:

- Includes additional RAW image support for several cameras
- Addresses an issue with stuttering video and audio playback in certain USB devices
- Improves 802.1X (Wifi) behavior and reliability and when using Time Machine
- Includes fixes for Time Machine compatibility with Time Capsule

Google posts that the Address Book application in Mac OS X 10.5.3 now lets iPhone users sync their Address Book with Google Contacts.

Ghost toddler from ancient Egypt on show as art

May 24th, 2008 by Mylo

mommyThe ghost of an Ancient Egyptian toddler now haunts a London gallery, after scans of his mummy were fashioned into a work of art.

Artist Angela Palmer has already turned Carol Vorderman’s brain, and even her own, into eerie artistic representations, formed from layers of glass that have been engraved with contours based on scans of their brains.

Now she has used the same method to bring the remains of the toddler into view and shed new light on a family tragedy that took place almost two thousand years ago in Egypt.

Her reconstruction of “Mummy Boy 3″ is now on display at Waterhouse & Dodd in the West End of London, until June 12.

She had originally wanted to scan the head of the boy king Tutenkhamum, but was told that request was out of the question.

However, the Ashmolean Museum in Oxford allowed her unprecedented access to the mummy to shed new light on the toddler’s death in Roman times.

“It is an exquisite mummy,” says Ms Palmer. Working with Dr Helen Whitehouse of The Ashmolean Museum, Oxford, 2500 images of the little mummy were taken with an CT X ray scanner in the John Radcliffe Hospital, Oxford, to create the stacked glass sculpture.

“As you move around it, the mummy disappears from view, in an ethereal effect,” she says.

As a bonus, the effort has revealed to archaeologists new details of the mummy. The remains were of an 18 month old and it was a boy, as shown by his mummified penis.

Unusually, he lacked his baby side teeth. His brain had also been removed, in common with standard funerary practices of the day.

The scans show that the elaborate bandages that wrap the remains, forming an elaborate lozenge pattern, are typical of the approach used in AD 80-120.

The presence of gold studs of gilded plaster, bound near his lap, suggest that the little boy was the son of a noble or an official.

Exhibited alongside the resulting see through sculpture, built up from glass engraved with the scans, are the mummy itself, along with films and photographs taken by the artist of local boys from the village of Hawara, south west of Cairo.

It was there that the mummy was found in 1888 by the British archaeologist W. M. F. Petrie, while excavating around the royal pyramid of Pharaoh Amenemhet III (1818–1770 BC).

Poignant relics from a 100 acre cemetery there, from toys to tiny shoes and clothes, testify to how around quarter of children at that time did not survive beyond their first year, comments Dr Whitehouse, adding that diseases, insects, malaria and parasitic worms were prevalent until the 20th century.

The precise cause of death are not clear, though the child had a problem with his right hip, and had an inflamed lung, consistent with pneumonia.

Expanding Supernova Marks Youngest Yet - And There May Be 10 Even Younger

May 18th, 2008 by Mylo

NASA held a press conference today to announce the discovery of a discovery of the most recent supernova in our galaxy. The discovery was made by tracking the rapid expansion of its remains.

The supernova explosion occurred about 140 years ago, making it the most recent supernova in the Milky Way as measured in Earth’s time frame. Previously, the last known galactic supernova occurred around 1680, based on studying the expansion of its remnant Cassiopeia A.

The tracking of this source began in 1985 when astronomers, led by David Green of the University of Cambridge, used the VLA to identify G1.9+0.3 as the remnant of a supernova explosion near the center of our galaxy. Based on its small size, it was thought to have resulted from a supernova that exploded about 400 to 1000 years ago.