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Increased environmental carbon levels - the good news!
April 03, 2006Increasing carbon levels can be a good thing in some cases: scientists at the University of Durham propose that higher levels of inorganic carbon can have a positive influence on human health.
Carbon levels are sensed by a biological molecule, adenylyl cyclase (AC), that can then affect sperm motility or the virulence of a dangerous human pathogen. So far, AC is the only signalling molecule known to directly respond to inorganic carbon. Dr Martin Cann will present this work at the Society for Experimental Biology Annual Main meeting at the University of Kent, Canterbury on Monday 3rd April [session A1]. Dr Cann's group have been studying the effects of increased levels of inorganic carbon (Ci) on Pseudomonas aeruginosa, a pathogen that causes an array of infections in weakened patients and is renowned for being difficult to treat with antibiotics. They have found that increased levels of Ci inhibit an AC required for host cell invasion. "This suggests that the bacterium's sensitivity to Ci could potentially make this detection pathway an attractive target for the development of new anti-bacterial drugs", says Cann. "In theory, if you could increase the amount of Ci available locally to P. aeruginosa then you could stop it infecting the host."
The AC-enzyme is also known to send a cascade of signals that regulate mammalian sperm motility in response to Ci - a consequence that has implications for human reproduction, perhaps in the treatment of infertility.
Dr Cann is learning more about the role of AC in carbon-detection using cyanobacteria and will report that, in conditions of elevated environmental CO2, AC is essential for full cyanobacterial motility.
Society for Experimental Biology
Dr Cann is learning more about the role of AC in carbon-detection using cyanobacteria and will report that, in conditions of elevated environmental CO2, AC is essential for full cyanobacterial motility.
Society for Experimental Biology
Carbon Levels News and Current Carbon Levels Events RSSCan biofuels be sustainable?
With oil prices skyrocketing, the search is on for efficient and sustainable biofuels. Research published this month in Agronomy Journal examines one biofuel crop contender: corn stover.
Pacific coast turning more acidic
An international team of scientists surveying the waters of the continental shelf off the West Coast of North America has discovered for the first time high levels of acidified ocean water within 20 miles of the shoreline, raising concern for marine ecosystems from Canada to Mexico.
Compost can turn agricultural soils into a carbon sink, thus protecting against climate change
Applying organic fertilizers, such as those resulting from composting, to agricultural land could increase the amount of carbon stored in these soils and contribute significantly to the reduction of greenhouse gas emissions.
Before selling carbon credits, read this
Storing carbon in agricultural soils presents an immediate option to reduce atmospheric carbon dioxide and slow global warming.
Climate History Rewritten: Arctic Ice an Early Arrival
For the first time, scientists have pulled up prehistoric geologic records from the frigid vault of the Arctic Ocean. One of the findings, evidence of glacial Arctic ice from 45 million years ago, recasts a critical chapter of global climate history.
Watery grave for 7,700 year old who wouldn't eat her greens
University of Sheffield archaeologists have uncovered a 7,700-year-old human thighbone, which has provided new evidence about the diet of ancient people. The thighbone, which belonged to a woman living in the Mesolithic era, was found in a dried up channel of the River Trent during excavation of a gravel pit. The find was unusual because human remains of the Mesolithic era are rare, with most previously recovered from coastal sites. Even more interesting was 'The Lady of Trent's' diet. Over the years there has been much debate as to the diet of Mesolithic people, particularly in relation to the importance of seafood and plants in their diet. Stable isotope analysis of the bone showed that t
New earth observation centres announced
Two new centres which will use satellites and models to help forecast earthquakes and the effects of carbon in climate change were announced (Wednesday 17 October) by Lord Sainsbury, Science & Innovation Minister. Said Lord Sainsbury, " I am delighted to announce that the Natural Environment Research Council is establishing two new Centres of Excellence, specialising in earth observation. The Centre for Terrestrial Carbon Dynamics brings together a variety of experts who will harness information from space to achieve greater understanding of the Earth's carbon cycle. The centre will make a powerful contribution to understanding global warming brought about by greenhouse gases. Secondly,
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