Tag: "sunlight" at biology news
Endurance of plants under quartz rocks possible model for life on early Earth, Mars
...ife around those parts of their bottom edges where sunlight
could penetrate through the stone at an oblique an...bbles. In fact, their Ecology paper suggested that sunlight
transmitted through the translucent quartz might "confer a modest greenhouse effect" during the cool...
New 'bumpy' jelly found in deep sea
...about 500 to 1800 feet), just below the level that sunlight
can penetrate, but above a layer of very low oxygen levels. This region is known as the mesopelagic realm, and is the home of entire communities of gelatinous animals. In fact, based on field and lab observations, the researchers believe that this je...
Astronomers unravel a mystery of the Dark Ages
...eloped the earth in soot and ash, blocking out the sunlight
and causing the very cold weather. This effect is known as a plume and is similar to that which was seen when comet Shoemaker-Levy-9 hit Jupiter in 1995. Historical references from this period - known as the Dark Ages are sparse, but what records th...
Seeing how plants split water could provide key to our future energy needs
...oxide into organic matter and oxygen (O2) by using sunlight
to split water (H2O). Using X-ray crystallography,...e. Yet nature figured out how to split water using sunlight
in an energy efficient way 2.5 billion years ago. By revealing the structure of the water splitting ...
USGS February science picks
...s algal blooms that affect water quality and block sunlight
from reaching underwater grasses. The water-quality criteria proposed by the Chesapeake Bay Program probably will not be met by the goal date of 2010 because of the lag time between implementing best management practices and the actual improvement in...
Comets spread Earth-life around galaxy, say scientists
... driven out of the solar system by the pressure of sunlight
in a few years. The solar system could, therefore, be surrounded by an expanding 'biodisc', 30 or more light years across, of dormant microbes preserved inside tiny rock fragments. In the course of Earth history there may have been a few dozen close ...
Cities built on fertile lands
... solar radiation in the red part ofthe spectrum of sunlight
used for photosynthesis during plantgrowth. These data were then entered into a Stanford Universitycomputer model to derive NPP. The computer model created a potential pre-urban Americanlandscape, which was used to compare and estimate the reductiono...
Scientists in Germany and Hebrew University illuminate process in control of flowering in plants
...es, through simple manipulation of the elements of sunlight
reaching plants by using special screening....
Symposium examines the growing influence of aerosols on climate
...e a warming effect, or they can reflect or scatter sunlight
and produce cooling effects. They can change the heat balance of the surface of the ocean, altering water evaporation processes and leading to a cascade of complex effects and indirect consequences, all of which scientists are now studying. Somervil...
Tips from the Journals of the American Society for Microbiology
...hers. Solar irradiation is the process by which sunlight
eradicates bacterial growth. In the study, samples of river water and partially processed water from wastewater treatment plants were treated with the solar disinfection unit. Results showed that 99 % of bacteria in highly contaminated samples were...
Experts to lecture in US cities this spring about new human origins research
...ns or Pritikin to eat well and live right? How did sunlight
effect skin coloration? Why and how did we begin to walk upright? The Leakey Foundation has joined forces with scientific organizations across the US to present the 2004 Speaker Series on Human Origins which will attempt to answer these questions w...
A world ruled by fungi
...g life form on Earth. Atmospheric dust blocked the sunlight
and led to the death of plants that are dependent on photosynthesis. The layer of fossil fungi is followed by a 60 cm thick interval containing traces of the recovery flora, which re-established relatively quickly, ground ferns at first, followed aft...
There be dragons: New deep-sea predator species discovered
...as camouflage to make the fish blend in with faint sunlight
from above, thus appearing invisible to potential predators below. The distinguishing feature of dragonfishes is a long thin protrusion known as a barbel anchored at the fish's chin that trails below its body. The barbels look like tree branches, an...
Study reveals poor Houston air quality
...to plants, animals and humans. During the daytime, sunlight
catalyzes ozone formation from volatile organic compounds and nitrogen oxides emitted from cars. Zhang's study, which was funded by the Texas Air Research Center and NASA, shows the city must take steps to curb its air pollution problems. "There are ...
Is that plant a tortoise or a hare? Answer predicts its response to environmental change
...be favored, he said. Similarly, if there is little sunlight
available in the understory of a forest, the "tort...hinner a leaf, the better the chance that a ray of sunlight
will penetrate to the leaf's photosynthetic machinery--but the greater its chance of being blown or ...
Plankton may influence climate change says UCSB scientist
...no observational evidence illustrating how reduced sunlight
actually leads to the decreased ocean production o...ng to increased cloudiness. With more clouds, less sunlight
reaches the Earth and the biological processes which produce DMS are reduced. According to their re...
The UV advantage
...strates moderate exposure to natural or artificial sunlight
has a powerful beneficial impact on health. Simply...nced, unbiased view of the benefits and dangers of sunlight
exposure in the last 50 years." Holick cautioned, "There are important medical consequences of thi...
Other highlights in the May 19 JNCI
...gment traits, moles, and exposure and reactions to sunlight
in individuals from 53 melanoma-prone families and 295 families unselected by family history. They also looked for genes that might confer a higher risk of melanoma. A dominant gene was associated with an increased risk of melanoma in both sets of fa...
Researchers target deficit irrigation for wine grapes
...ire less water throughout the growing season. More sunlight
reaches present and future cane buds, where vines flower and set grapes. Sunlight, in turn, promotes fruit quality of ripening grapes. A small canopy requires less annual pruning and allows more air circulation in the vines, which reduces the poten...
Unexpected changes in Earth's climate observed on the dark side of the moon
...lectance, or albedo, by observing earthshine (ES), sunlight
reflected by the Earth that can be seen as a ghost...ace temperature is determined by a balance between sunlight
that warms the planet and heat radiated back into space, which cools the planet," said Palle. "This ...
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