Tag: "sun" at biology news
Team of 200 scientists presents new research that reveals full 'tree of life' for plants
... Centuries ago, the scientific discovery that the sun
is merely one star in auniverse full of stars, planets and other astral bodies shattered mankind'spreconceptions of space and led to the exploration of the cosmos. Similarly, theresearch team's findings could shatter some preconceptions about life he...
New UNC-CH study explains variations in onset of ice ages
...past three decades. "The earth circles the sun
every year in an orbit that becomes eithermore ell...dic dipping into a dust ring that also circles the sun
might haveshaded and chilled the planet instead, they said. Rial, who believed Milankovitch ...
Sensible health warnings to stay out of sun may also be denying some people the benefits it provides
... cancers, people worldwide continue to worship the sun
- but are the effects of the sun
all bad for people? In this week's BMJ, researchers from the University of Bristol raise the issue ...
UV Rays, Fire And Flame Retardants To Be Reviewed For Possible Listing As Carcinogens, NTP Announces
...artificial light from such devices as sunlamps and sun
beds, will be reviewed for possible listing in the federalgovernment's Tenth Annual Report on Carcinogens, National Toxicology Programofficials said today. Additional substances to be considered for listing, according to theannouncement, are:...
The Green Party
...olar panels. And what do you do for power when the sun
sets? The Space Shuttle investigation is trying to discover what features ofphotosynthetic proteins allow for solar energy conversion. While humans haveonly been developing solar power technology for a few decades, plants have beenevolving for billio...
Seeking Life At Its Limits Leads To Antarctica
...eaded south for winter break. However, it was not sun
and surf hewas seeking, but slush and ice. Beginning in late December, Sanders and colleagues from the Woods HoleOceanographic Institution, in Woods Hole, MA, embarked on a two-month trip toAntarctica aboard an ice-breaking research vessel to study m...
UV Radiation Induces Vitamin A Deficiency In Skin
...t is well known thatultraviolet radiation from the sun
has many effects on skin, scientists stilldon't fu...oic acid or retinol to skinbefore going out in the sun
might be beneficial. However, before vitamin A orretinoic acid can be recommended as a preventive a...
New Method For Destroying Potentially Deadly Toxins In Drinking Water
... titanium dioxide, a white powder commonly used in sun
creams andpaints, is added to water and exposed to light, it becomes active and destroysthetoxins. Known specifically as microcystin-LR (cyanobacterial hepatotoxins), thetoxins are "very difficult to destroy" with normal water purification methods,ac...
Shedding Light On Circadian Rhythms
...ay thatsenses blue light, and thereby connects the sun
to molecular components of thecircadian clock, says Joseph Takahashi, an HHMI investigator at NorthwesternUniversity. In an article published in the November 20, 1998, issue of Science, Takahashiand Aziz Sancar of the University of North Carolina Sch...
Microbiologist Develops Method For Dyeing Fabrics With Gold
... "Common organic dyes bleach out through the sun
and chemicals," Toddexplains. "Colors made by metals will remain forever." To demonstrate the permanency of the process, Todd used delicate silk toshow the effects of bleach. He soaked a swatch of cloth in undiluted chlorinebleach for 10 mi...
Scientist Finds Asteroid Fossil That May Have Caused Global Dinosaur Extinction
...our solar system, asteroids are found orbiting the sun
in a beltbetween Mars and Jupiter. This rocky belt of space debris is thought to be aleftover from the time when the planets first formed. Kyte notes that this particular asteroid moved out of the belt towardsEarth at about 40,000 miles per...
Sunless Tanning Agents Provide Continuous Sun
...say, itresists soap-and-water washing, reduces the sun
exposure of persons with fairski,and increases the...inst UVA, UVB and visible radiation. Although the sun
protectionoffered by products containing DHA offers only an SPF of level 3, it offersday-long protec...
Researcher Finds World's Most Diverse Home Of Slime Molds
...e cut down, slime molds die from exposureto direct sun
and rain. Without slime molds, forest rebirth is impossible. "There's a lot of pressure to cut the rain forests, and that means aloss of soil sustainability," Cavender said. "I hope this will draw people'sattention to the need to preserve rai...
UV Skin Damage In A Different Light
Despite all the warnings to avoid exposure to the sun
and to wear sunscreen,scientists don't really know how the sun
damages our skin. Now, they're a bitcloser to the answer. Two scientists recently discovered that...
Study Pinpoints Rare Molecular 'Transitions' As Possible Cause Of Skin 'Photoaging'
... The molecule was even used for a time as a sun
screen ingredient. Butmanufacturers in the United States agreed to a voluntary ban, Simon said, afterGeorge Washington University researchers discovered that a rearrangment ofurocanic acid, called the cis-isomer, is formed by the absorption of sunlig...
NASA Funds New Origin Of Life Center at Rensselaer Polytechnic Institute
...r clouds and modifiedin the nebula that became our sun
and our solar system. An alternative view claims that the building blocks of life on Earth were formedhere by the action of various energy sources on the atmosphere that emerged fromvolcanic emissions early in Earth's evolution. "The interdisciplina...
Scientists Find Further Global Warming Evidence In Temperature Reconstruction Study
...cate that natural changes in the brightness of the sun
andvolcanic emissions both played an important role in governing climate variationsover the period studied. However, over the past few decades, greenhouse gases produced by humanactivities appear to have had an increasing influence on tempera...
Environmental Technology Breakthroughs Forecast -- Year 2008
...result will be power on demand instead of when the sun
shines orwind blows. These renewable energy sources also will help slow increases ingreenhouse gases by replacing carbon-based fuels. Micro is beautiful--The silicon chip ushered in micromanufacturing. Now microtechnology for producing and using e...
New Sunspot Cycle To Be Bigger Than Average
...nalof Geophysical Research (Space Physics) . The sun
now is on the upswing of its 23rd activity cycle, ...han a matter of scientific curiosity. An active sun
can cause geomagnetic storms that endanger satellites and disrupt communications and power sy...
Smog Spreading To South Pacific
...nstbiologically harmful ultraviolet light from the sun
in the upper atmosphere. Rowland spoke today at a symposium honoring Molina as the 1998 winner of theAmerican Chemical Society Award for Creative Advances in Environmental Scienceand Technology. Paper ENVR 22 will be presented by F. S. Rowland from 9...
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