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Tag: "sunlight" at biology news

New sunscreen ingredient to heal sunburn and help prevent skin cancer

...produce harmful radicals during exposure to bright sunlight in order to prevent the unwanted side reactions th... children Then use factor 15+ sunscreen "UVB sunlight is associated with the hottest part of the day, between 10am and 3pm, when the sunlight is brightest...

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 m...

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...

Buildup of damaged DNA in cells drives aging

...eme sensitivity to ultraviolet (UV) radiation from sunlight is a hallmark of diseases caused by defective DNA ...g or reducing DNA damage caused by sources such as sunlight and cigarette smoke, as well as by our own metabolism, also could delay aging," explained Dr. Nieder...

Five new technologies that promise to transform medicine

...erative eye disease. The telescopes are powered by sunlight passing through the pupils to microscopic solar battery panels attached to the retinas. These scenarios illustrate potential clinical applications of technologies currently under development, says Professor Combs. For instance, devices that can se...

Harmful Algal Blooms monitored from space in Chile

...phyll for photosynthesis -- the process of turning sunlight into chemical energy. The chlorophyll collectively tints the colour of the surrounding water, providing a means of detecting these tiny organisms from space with dedicated 'ocean colour' sensors onboard satellites. The CAP project utilises a combin...

UCI scientists find chlorine may contribute to ozone formation

...han expected. It must be rapidly produced, because sunlight destroys it so quickly," Saltzman said. "Most likely the process involves airborne marine particles, but research is needed to understand how it occurs." Inland ozone levels typically are higher than on the coast, mainly because of meteorological co...

Tiny airborne particles are a major cause of climate change

...an less reflection of sunlight; less reflection of sunlight and absorption of radiation lead to warming. Policy makers have argued that, in the bottom line, the warming effect of the greenhouse gases and the (mainly cooling) aerosol effect may balance each other out so that the net global climate change wil...

How plants avoid feeling the burn

...arotenoids act as 'wires' to carry away the extra sunlight energy in the form of unwanted electrons, somehow wicking away the extra electrons across long distances from locations that could damage plant tissues and photosynthesis. During photoprotection, the consensus school of thought was that carotenoids--...

Mosquito spray increases toxicity of pyrethroids in creek, study finds

...rumps everything, and pyrethrin and PBO exposed to sunlight degrade easily into innocuous substances after a day or two," he said. However, based upon these study results, Weston said regulators should not only consider the toxicity of individual active ingredients in a product, but also how ingredients may...

NASA study solves ocean plant mystery

...rescence. Fluorescence occurs when plants absorb sunlight and some of that energy is given back off again as red light. Scientists looked at approximately 140,000 measurements of fluorescence made from 1994 to 2006 along 36,040 miles of ship tracks. They found that phytoplankton give off much more fluoresce...

Discovery may speed forest biotechnology

...nergy on growth and height in order to compete for sunlight with other trees, and only later in their life do they divert energy to produce seed." Strauss noted that for the same reasons, any releases of such early-flowering genes into wild populations are very unlikely to be of ecological concern, as trees ...

The critical importance of mangroves to ocean life

.... Once in the ocean, however, the intense tropical sunlight destroys some of the most delicate dissolved organ... dissolved organic matter survives the attack from sunlight or bacteria. The authors measured the chemical signature in water samples from the massive mangrov...

Enzyme crystal structure reveals 'unexpected' genome repair functions

...oves DNA lesions caused by the mutating effects of sunlight (ultraviolet light) and toxic chemicals. In addition, NER is critical to the success of the anticancer drug cisplatin, since cisplatin works by initiating the process of DNA repair, in turn activating apoptosis or programmed cell death when the rep...

Biofuels can replace about 30 percent of fuel needs with significant research and policy effort

... prepared from sustainable sources such as plants, sunlight and wastes. Other team leaders on the project include Dr. Charlotte Williams and Dr. Richard Murphy from the Imperial College London and Dr. Brian Davidson from Oak Ridge National Laboratory. Other key collaborators include Dr. Charles Liotta, Dr. C...

Sun protection for plants

...a and rice producers in Asia. Very high levels of sunlight can be hazardous to plants, overwhelming their ability to photosynthesise. This effect is exaggerated when there is a shortage of water or extreme temperatures. The resulting damage to the delicate photosynthetic membranes in the plant leads to impai...

Skin disease common among Hispanic farmworkers in North Carolina, research shows

...cer as a potential health problem, yet exposure to sunlight is a major risk factor for the disease. The interv... the delayed effects of some risk factors, such as sunlight exposure, need to be stressed." ...

Tiny polyps gorge themselves to survive coral bleaching

...in its cells for the algae while the algae convert sunlight into energy for the polyp. Grottoli said that when the temperature of the waters around a reef exceeds that upper limit and stays there for more than two weeks or so, it triggers a bleaching event. Once that happens, the symbiotic algae and the bro...

Odd energy mechanism in bacteria analyzed

...ntained by photosynthesis, in which plants convert sunlight into biological energy through a process that requ... now clear that SAR11 has its own mechanism to use sunlight energy that does not involve chlorophyll. Rather, it uses retinal, the same protein used by the eye...

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