Tag: "sunlight" at biology news
New insight into skin-tanning process suggests novel way of preventing skin cancer
... mice, not by exposing them to ultraviolet rays in sunlight
(the usual route to a tan), but by applying a cream that switched on the tanning machinery in their skin cells. Because people who tan easily, or have naturally dark skin, are far less likely to develop skin cancer than fair-skinned individuals -- wh...
Record ozone loss during 2006 over South Pole
...tospheric stratum of the atmosphere that acts as a sunlight
filter shielding life on Earth from harmful ultrav...polar spring arrives, the combination of returning sunlight
and the presence of polar stratospheric clouds leads to splitting of chlorine compounds into highly ...
ACS News Service Weekly PressPac -- September 27, 2006
...s Alternative energy: A new way to take a bite of sunlight
An ancient hair dye based on modern nanotechnology...inspiration to propose a new method for harvesting sunlight
to produce electricity. Andrei P. Sommer and Michael Gente say tooth structure bears similarities ...
ASU embarks on NSF grant for Nanotechnology Solar Energy Initiative
...can only harness 10 to 30 percent of the available sunlight
energy. The majority of the energy is lost, and simply escapes as heat. The ASU researchers hope to make progress by, in this case, shedding more heat than light. One part of the project will focus on developing better light gathering capabilitie...
Otherworldly bacteria discovered two miles down
...the base of the food web. But in dark places where sunlight
doesn't reach, life has to depend on other energy sources. Other communities of "chemoautotrophs"--a word chained together from Greek roots meaning "chemical self-nourishment"--have been found in exotic places such as aquifers, petroleum reservoirs, ...
Bacteria that use radiated water as food
...arently millions of years old -- and depend not on sunlight
but on radiation from uranium ores for their exist...lankton and trees at Earth's surface, that capture sunlight
energy ultimately to the benefit of everything and everyone else. In the deep subsurface case, Firmi...
Learning how nature splits water
...ago, primitive bacteria developed a way to harness sunlight
to split water molecules into protons, electrons a... to develop clean energy technologies that rely on sunlight
to split water and form hydrogen to feed fuel cells or other non-polluting power sources. Specific...
Researchers link ocean organisms with increased cloud cover and potential climate change
...may influence the formation of clouds that reflect sunlight
away from our planet. Discovery of the new lin...g increase in cloudiness reduced the absorption of sunlight
by an amount comparable to what has been measured in highly polluted areas of the globe. If confirm...
Early Earth haze may have spurred life, says University of Colorado study
...les that form through photochemical processes when sunlight
reacts with methane gas, she said. According to the study, a similar haze hanging over Earth early in its history could have supplied more than 100 million tons of organic material to the planet's surface each year. "As these particles settled out...
Microorganisms one part of the solution to energy problem, says report
...nected to the household electric system, that uses sunlight
and water to produce the electricity that warms your home, cooks your food, powers your television and washes your clothes. All these futuristic energy technologies may become reality some day, thanks to the work of the smallest living creatures on ...
ACS News Service Weekly PressPac -- Nov. 15, 2006
...lanet and affect global temperatures by reflecting sunlight
back into space and preventing terrestrial heat fr...house warming by slightly increasing reflection of sunlight
back into space and reducing the escape of terrestrial heat. ARTICLE #3 "Formation of Low-Tempera...
Focus on photosynthesis
...etic microorganisms split water with the energy of sunlight
- only then would they be able to copy the process...erent stages of reactions in the process that uses sunlight
to split water," says Messinger. "This is an important step towards developing artificial catalysts ...
Plant potential in the pipeline
...lution. They are green factories using energy from sunlight
to make biofuel, bioplastics and a range of other products cheaply and in large quantities. The reports, issued today by the EPOBIO project, present detailed analyses of how plant products and plants themselves can be used to replace products made us...
Protein protects against nerve degeneration
...ade large quantities of NMNAT in the eye to bright sunlight
for 30 days, they found that only 20 percent of the neurons died not the 80 percent that would have been expected. "This protein can delay the neuronal degeneration process if it is present at a high level," said Bellen. They also found that NMNAT...
ACS News Service Weekly PressPac -- Nov. 29, 2006
...vance in technology for water photooxidation using sunlight
to produce clean-burning hydrogen fuel from ordinary water. Michael Gratzel and colleagues in Switzerland note that nature found this Holy Grail of modern energy independence 3 billion years ago, with the evolution of blue-green algae that use photos...
Global warming will reduce ocean productivity, marine life
... veneer of the ocean surface where there is enough sunlight
to sustain photosynthesis, makes them very responsive to changes in climate, Behrenfeld said. This was why we could relate productivity changes to climate variability in only a 10-year record. Such connections would be much harder to detect from spac...
Scientists learning to create nanomaterials based on micro-algae patterns
...t and remain at the surface of the water to absorb sunlight
for photosynthesis. Diatom photosynthesis is responsible for 20 percent of the worlds organic carbon. The pores allow diatoms to be lightweight, but their cell wall gives them a strong mechanical structure. The strength of the cell wall comes from am...
Extreme life, marine style highlights 2006 ocean census
...ne, about 500 m down, and the surface layer, where sunlight
and photosynthesis prepare food. Proportion of protected coral reefs Analysts in the Census network concerned with the future of marine animal populations compiled the first-ever global assessment of the extent, effectiveness, and omissions of cora...
American Chemical Society's Weekly PressPac -- December 6, 2006
...lashes of light a million times more intense than sunlight
to burn off layers of lead-based paint. The flash... biomolecules that could jump-start life with only sunlight
and a mineral present in the primordial oceans. The Krebs cycle is a series of chemical reactions of...
Pesticides need sunscreen to beat the heat
....1301) shows that the pesticides can be exposed to sunlight
for at least twice as long without degrading. Dr Wen, of the Bejing University of Chemical Technology, believes that the pesticide will be more effective as a result, thereby reducing the amount required and the cost to the farmer. It could also me...
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