Tag: "sunlight" at biology news

Plants provide model for new shape-changing materials

...n their environment, such as plants that track the sunlight or that stiffen when watered. These movements are caused by changes in the water pressure inside the plant and can result in very large changes in shape. The goal of the DARPA project, administered by John Main, is to develop synthetic materials tha...

World's top theoretical physicists converge to consider 'future of physics'

...it in the courtyard after hours. Most afternoons, sunlight baking the courtyard made it an inhospitable space for either collaborative conversation or the lone thinker. The two-story addition closes off the courtyard to exterior access, thereby adding to Kohn Hall the signature element of its Mediterranea...

Global warming's impact on US plants, animals determined from review of dozens of studies

...wn to enter the Earth's atmosphere, trapping extra sunlight there similar to the way a greenhouse works. Studies since then have gone further, and also attribute a considerable chunk of recent climate change across the United States to human-released greenhouse gases. The new report highlights actions that co...

Sea change: Skeletons of ancient corals different from today's

...nset in the morning and evening, as well as normal sunlight during the rest of the day. Ries fed the growing corals with plankton particles, and monitored each tank's pH level -- and level of chemicals such as strontium, iodine and manganese, as well as vitamins -- several times a week. Ries credits...

Plankton cool the southern hemisphere

...formed in the air as a result of this, reflect the sunlight back before it reaches the Earth, causing the Earth to cool. There are various reasons why plankton exert a greater influence on the climate in the southern hemisphere than in the northern hemisphere. For example, the plankton species in the souther...

NJIT physicists expect new super lens to reveal first light by early 2006

...faint illumination of the dark part of the moon by sunlight reflected from the earth. In the May 28, 2004 iss...ouds. The decreases in the planet's reflection of sunlight through the end of the last century may well be associated with the accelerated global warming in re...

Study: Eat leafy green veggies to help prevent cataracts

... cataracts, exposure to ultraviolet radiation from sunlight and oxidative stress appear to be the most relevant in this disease," Bomser said. "Our results are the first to provide physical evidence suggesting that lutein and zeaxanthin decrease damage caused by ultraviolet radiation." The study appears...

Carbon sink or carbon source? Aerosols play role in shifts

...of diffuse radiation radiation that is not direct sunlight but radiation scattered by clouds, haze, or someth...t areas with plants receiving more constant direct sunlight would result in a surface becoming a carbon sink, that is not necessarily the case, Niyogi says. In ...

The secret life of acid dust

...isture. These wet particles can scatter and absorb sunlight -- presenting climate modelers, who need to know where the energy is going, a new wild card to deal with. Companion studies of dust samples from the Sahara and the Saudi coast and loess from China show that the higher the calcium in the mineral, the ...

NASA study finds tiny particles in air may influence carbon sinks

...unt of light to Earth's surface. As a result, less sunlight on plants caused less photosynthesis to occur. The...ached Earth's surface. Instead, aerosols scattered sunlight allowing more radiation to penetrate to the lower layers of leaves. This less concentrated radiation...

Backcountry water quality tests are good news for campers

...n creeks, possibly because the ultraviolet rays of sunlight work better at killing off bacteria in calm waters of a lake than in the tumbling flows of a stream; Algae growth in backcountry waterways appears to be getting worse; Bacteria readings appear higher at the beginning of spring runoff rather tha...

NJIT astrophysicist who revived earthshine named fellow of American Physical Society

...aid. "The decreases in the planet's reflection of sunlight through the end of the last century may well be associated with the accelerated global warming in recent years." In the May 1, 2001 issue of Geophysical Research Letters, Goode and a research team detailed how they had revived and modernized earths...

Key molecule in plant photo-protection identified

...esis, green plants are able to harvest energy from sunlight and convert it to chemical energy at an energy transfer efficiency rate of approximately 97 percent. If scientists can create artificial versions of photosynthesis, the dream of solar power as a clean, efficient and sustainable source of energy for ...

Scientists propose new approach to estimating global ocean productivity

... that method. Chlorophyll in the water varies with sunlight intensity and phytoplankton physiology. Plants growing in low light conditions produce as much or more chlorophyll per cell as plants growing in full sunlight, says Boss. However, plants need nutrients such as nitrogen and phosphorus, and when nutr...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...ges we capture may only reveal a faint signal. Any sunlight that leaks in to the camera of a conventional fluorescence imager would obscure the signal," said Waggoner. "To avoid this problem, we designed our system to excite dyes with high intensity flashes of light. The camera only opens during those flashes...

Follow the energy

...and cyanobacteria are able to transfer energy from sunlight and initiate its conversion into chemical energy with an efficiency of nearly 100-percent. If we can learn to emulate Nature's technique and create artificial versions of photosynthesis, then we, too, could effectively tap into the sun as a clean, e...

Scientists find viruses can't stick to sea bugs in the dark

...s can use up the oxygen in water and block out the sunlight that other organisms need to live. "If there is not sufficient light, the spread of the phage might be decreased, which could undermine the efficiency of phage treatment." Ying Jia hopes that the research will lead to a better understanding of the ...

Surgery season and vitamin D intake may predict successful lung cancer surgery

...ugh their diet and supplements, as well as through sunlight exposure, compared to patients who do not. "This study in no way suggests that people should try to time their cancer surgeries for a particular season - that would obviously be impossible," Zhou adds. "But, if validated, it may mean that increasing ...

Nitrogen fertilization of soil puts rare plant species at risk, nationwide study determines

...s at risk: short height (short plants receive less sunlight in the midst of taller plants); the ability to convert atmospheric nitrogen, via bacteria, into a form that plants can use (the cost of supporting the bacteria hurts the plants); and a short life span (longer-living plants do not have to start the li...

Scientists discover how plants disarm the toxic effects of excessive sunlight

...ional Academy of Sciences. Plants turn energy from sunlight into bioenergy through a chemical process called p...le to other fields of study. For example, too much sunlight can actually be harmful to plants, because the heightened photosynthetic activity also means an incr...

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