Uncategorized
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19272
I read this article with interest. Can you tell me what contributes to these deposits in arteries? Julie WinslettDahlonega, Ga. It’s not ingestion of calcium, at least in people with normal kidney function, says Paolo Raggi of Tulane University in New Orleans. Rather, the condition stems from damage to vessel walls wrought by high blood […]
- Health & Medicine
Coronary calcium may predict death risk
The amount of calcium in the coronary arteries can serve as a risk marker for people who are otherwise without heart disease symptoms.
- Earth
New mantle model gets the water out
A novel notion of geophysical processes taking place deep within our planet may explain why the upper layer of Earth's mantle is relatively depleted of many trace elements.
- Astronomy
Solar system replica?
Carefully monitoring the motion of a star 90 light-years from Earth, astronomers have found what may be the closest analog known to our solar system.
- Health & Medicine
Grades slipping? Check for snoring
Children who snore frequently are more likely to struggle with their schoolwork than are children who rarely snore.
- Paleontology
Fossils’ ear design hints at aquatic lifestyle
New studies of distinctive skull structures in fossils of one of Earth's earliest-known four-limbed creatures suggest the animal could hear best when it was underwater.
- Chemistry
Secret of strong silk
By controlling the amount of water in their glands, spiders and silkworms prevent their silk proteins from crystallizing prematurely.
- Earth
Exposure to phthalate may shorten pregnancy
Babies exposed to a common phthalate plasticizer before birth spend a week less in the womb than do those without evidence of exposure.
- Tech
Memory Enhancers
Engineers take aim at increasing the density of data storage on magnetic media.
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19271
There is a striking similarity in the wave patterns of the ash plume on the cover of the Sept. 13 issue (above) and those in the gas of the Perseus Cluster (“A Low Note in Cosmos: Sounding out a new role for black holes,” SN: 9/13/03, p. 163: A Low Note in Cosmos: Sounding out […]
- Earth
Product Health and Safety
What’s under your kitchen sink, in your garage, in your bathroom, and on the shelves in your laundry room? Do these household products pose a potential health risk to you and your family? The National Library of Medicine’s new Household Products Database offers users information on the potential health effects of about 2,000 ingredients contained […]
- Humans
From the September 9, 1933, issue
FLEET AS MERCURY The laboratory has yielded a photograph of striking beauty showing Dr. Joseph Slepian and Leon R. Ludwig, Westinghouse engineers, examining a product of their research. They have developed a new method of controlling mercury arc devices which is said to be more positive and many times faster in action than methods now […]
