Tag: "century" at biology news
Plants will not save us from greenhouse gases
... be applied to other plants species. Over the next century
we may see a dramatic change in all plants (including agricultural species) as our use of fossil fuels increases and generates increased carbon dioxide levels....
Study: Emission of smog ingredients from trees is increasing rapidly
... where farmland has been abandoned during the last century
have early generations of trees that produce higher levels of VOCs than older growth forests. In the South, pine plantations used for their fast-growing supplies of timber have proven to be havens for sweetgum trees, which are major producers of VOCs...
HHMI, NIBIB/NIH to invest up to $35 million in interdisciplinary Ph.D. programs
...er equipped to meet the complex challenges of 21st century
medicine." The new NIH Roadmap and recent reports from the National Academies Convocation on Facilitating Interdisciplinary Research and the Association of American Medical Colleges' Graduate Research, Education and Training Group emphasize the...
New research suggests early diet may play key role in protecting against childhood leukaemia
...ore than 50 per cent during the second half of the century
alone. Although the causes of leukaemia in children are poorly understood, modern environmental and lifestyle factors are thought to play a major role in the rising incidence. If this is the case, it should be possible to take preventive measures. B...
New evidence of radiation risk in childhood leukaemia
...ore than 50 per cent during the second half of the century
alone. The reasons for the increase remain unclear and it is only by finding out more about the causes that we can establish whether it is possible to take preventive measures and halt the rising incidence. This is the motivation behind the conferenc...
Research suggests unborn children may be at risk from environmental pollution
...by more than 50 per cent in the second half of the century
alone. The causes of leukaemia in children are not well understood and the reasons for the increasing incidence are unknown. This is the driving force behind the conference Childhood leukaemia: incidence, causal mechanisms and prevention which is ...
Men from early middle ages were nearly as tall as modern people
...uality in Europe grew considerably during the 16th century
and stayed high until the 20th century
the rich grew richer from soaring land rents while the poor paid higher prices for food, housing an...
Modest climate change could lead to substantially more and larger fires
...n 11 Western states could double by the end of the century
if summer climate warms by slightly more than a de...d an 85-year record of fire extent during the 20th century
and used them in conjunction with existing state-of-the-art global climate models. "Models linking ...
University of Arizona licenses patent for natural fungicide
...ht of potato, the disease associated with the 19th century
Irish potato famine. Zoosporic plant pathogens also cause the sudden oak death affecting oak trees in California and Europe. In the spring of 2004, Jeneil obtained U.S. Environmental Protection Agency approval to use a rhamnolipid product as a fungic...
One-hundred-fifty year old lessons of John Snow still relevant today
...n the 21st century, as it was for AIDS in the 20th century
and cholera in the 19th," he said. Rachman said Snow realized that disease-causing agents didn't distinguish between the rich and poor. Many at that time believed cholera was a disease that only attacked the poor. "He practiced on a diverse populatio...
Anti-bacterial additive found in Maryland streams
...ing this persistent disinfectant for almost half a century
at rates approaching 1 million pounds per year and still have essentially no idea of what exactly happens to the compound after we flush it down the drain. Further studies are needed to determine the effect of triclocarban on aquatic life and potenti...
When is a mouse like a test tube?
... one between azides and phosphines, described last century
by German synthetic-organic chemist Hermann Staudinger, a pioneering polymer chemist who won the Nobel Prize in 1953. Azides are simple, three-nitrogen molecules that can be added to biological molecules, in particular sugars, without really being no...
Excess levels of nitrogen, phosphorus linked to deformed frogs
... has been noted in the scientific literature for a century
and a half. But no one could explain why the inci...to 30 percent of some frog populations in the 21st century
compared with probably less than one percent historically. Now a collaboration involving ec...
Study suggests humans can speed evolution
It's no secret that life in the 21st century
moves at a rapid pace. Human inventions such as the Internet, mobile phones and fiber optic cable have increased the speed of communication, making it possible for someone to be virtually in two places at once. But can humans speed up the rate of one...
Climate change could doom Alaska's tundra
... present in 1920 will be gone by 2100, less than a century
from now, under one of the climate models projecti...'s going to happen during a 20-year period about a century
from now, we can be fairly confident. We also test these models by running them backward into the pa...
Wolf reintroduction reshapes Yellowstone ecology
...d Beschta, extirpation of wolves in the early 20th century
was "most likely the overriding cause of the precipitous decline and cessation in the recruitment of aspen, cottonwood and willow across the nothern range." The new theory thus brings a significant new factor into long-running, intense debates over...
Droughts like 1930s Dust Bowl may have been unexceptional in prehistoric times, new study suggests
...riods, with each wet-dry cycle lasting more than a century
each. A report on the research will be delivered a...wl effects. "And then, within several decades to a century
later, the grasses would come back, fires would start back up and erosion would stop." To make these...
Springtime blooms seen earlier now than in the past, say Boston University biologists
...wing today blossom more than a week earlier than a century
ago. Their findings, being presented at the Society for Conservation Biology's annual meeting in New York City July 30 August 2, show that among the plants studied in Boston's Arnold Arboretum, flowering times have moved forward over the decades, w...
DNA tests point to extinction of 2 distinctive arctic bird populations
...s is due to foxes that were introduced in the 18th century
for fur farming, while in Newfoundland the birds are hunted by people as small game. "Reclassification of these two populations should immediately move them into the 'species at risk' category, and thus afford them the protection they need," says Dr....
Briggs takes to the molecular level Darwin's findings on plants sensing the direction of light
...not have imagined that the topic would in the 21st century
be studied at the molecular level as it is now. Professor Briggs will present his group's latest findings on the topic at the ASPB Annual meeting during the Major Symposium on Tropisms 4 p.m. to 6:30 p.m. Saturday, July 24, 2004 in Coronado Ballrooms...
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