Enn Original News
Hatchery-Raised Salmon Threatening Wild Salmon in the Pacific Northwest
November 3, 2010 09:42 AM - David A Gabel, ENN
This year has had one of the biggest salmon runs of all time for the Pacific Northwest (PNW). There were over 34 million salmon in the British Columbia river system alone, compared to last year’s count of only two million. The problem with this resurgence is that much of the new numbers come from hatchery-raised salmon, which have created increased competition for the threatened wild salmon species.
November 2, 2010 01:41 PM - Andy Soos, ENN
How large can a Photo Voltaic (PV) solar farm be? It, of course, depends, on the available land space and the efficiency of the solar cells involved. Sarnia Solar Facility, deemed the world’s largest Photo Voltaic solar power station, has just opened in Canada. Located in Ontario, it has a capacity of 80MW, 20MW above Olmedilla PV Park in Spain, which so far has held the title as the largest of its kind in the world. Sarnia is expected to generate 120,00MWh per year, or enough power for 12,800 homes. For large-scale generation, Concentrated Solar Power plants like SEGS, have been the norm but recently multi-megawatt Photo Voltaic plants are becoming common. Completed in 2007, the 14 MW power station in Clark County, Nevada, United States and the 20 MW site in Beneixama, Spain are characteristic of the trend toward larger photovoltaic power stations in the United States and Europe.
November 2, 2010 09:30 AM - David A Gabel, ENN
Many people already know that city trees are highly desirable to make a neighborhood more attractive. It is common knowledge that shade from trees keeps temperatures on the ground cooler, can help buildings lower their overall energy usage, and their roots absorb storm water runoff efficiently. What people may not be familiar with is that trees also aid in fighting crime. Yes, trees can lower crime rates.
November 1, 2010 02:48 PM - Andy Soos, ENN
Strangely enough Edison had one of the first electric vehicles and Detroit made them until World War II. Then they died until in the 1990s some electric battery driven cars were recreated as something brand new to the marketplace. Then they withered and were reborn again in the present age of locomotion. Why was this? Is it doomed never to quite win a marker place niche? Although electric cars often give good acceleration and have generally acceptable top speed, the lower powered batteries available in 2010 compared with Carbon-based fuels means that electric cars need batteries that are fairly large fraction of the vehicle mass but still often give a low travel range between charges. Recharging can also take significant lengths of time. For shorter range commuter type journeys, rather than long journeys, electric cars are practical forms of transportation and can be inexpensively recharged overnight but some place to charge is necessary.
The Everglades Rebound
November 1, 2010 09:46 AM - David A Gabel, ENN
The Everglades is an extensive wetland system that is actually a sixty mile wide, extremely shallow river that flows from Lake Okeechobee over 100 miles to Florida Bay. Over-development from sugar producers and urban sprawl have put tremendous stress on the entire ecosystem by draining the land and channeling the water. Now, after decades of restoration efforts, the state of the Everglades is beginning to improve.
NOAA and FDA Announce Gulf Seafood well within safety standards based on new, more stringent testing
November 1, 2010 05:37 AM - Roger Greenway, ENN
A study conducted by NOAA and the FDA, building upon the extensive testing and protocols already in use by federal, state and local officials for the fishing waters of the Gulf, NOAA and the FDA are using a chemical test to detect dispersants used in the Deepwater Horizon-BP oil spill in fish, oysters, crab and shrimp. Trace amounts of the chemicals used in dispersants are common, and levels for safety have been previously set. Previous testing involved a "sensory analysis process". Using this new test in the Gulf scientists have tested 1,735 tissue samples including more than half of those collected to reopen Gulf of Mexico federal waters. Only a few showed trace amounts of dispersants residue (13 of the 1,735) and they were well below the safety threshold of 100 parts per million for finfish and 500 parts per million for shrimp, crabs and oysters. As such, the study concludes that they do not pose a threat to human health.
Innovation: Portable Breast Scanners
October 29, 2010 02:52 PM - David A Gabel, ENN
A new portable scanner for detecting early signs of breast cancer has been developed at the University of Manchester by Professor Zhipeng Wu. The device works by radio frequency technology that can show the presence of tumors on a computer screen. The amazing thing is that it can show the image within seconds on the computer screen, rather than an x-ray mammography which takes minutes and can only be done at hospital or specialist care centers. This new technology can revolutionize the early detection for women with breast cancer.
Antarctica Melting News
October 29, 2010 12:00 PM - Andy Soos, ENN
The change in the ice mass covering Antarctica is a critical factor in global climate events. Scientists at the GFZ German Research Center for Geosciences have now found that the year by year mass variations in the western Antarctic are mainly attributable to fluctuations in precipitation, which are controlled significantly by the climate phenomenon El Nino. Gravity data collected from space using NASA's Grace satellite show that Antarctica has been losing more than a hundred cubic kilometers (24 cubic miles) of ice each year since 2002. The latest data reveal that Antarctica is losing ice at an accelerating rate, too. How is it possible for surface melting to decrease, but for the continent to lose mass anyway? The answer boils down to the fact that ice can flow without melting.
Mind Over Fat
October 28, 2010 05:58 PM - Andy Soos, ENN
Scientists have revealed that an anti-obesity drug changes the way the brain responds to appetizing, high-calorie foods in obese individuals. This insight may aid the development of new anti-obesity drugs which reduce the activity in the regions of the brain stimulated by the sight of tasty foods. This is not unexpected since the brain is the center of many such sensory responses. For example in 2008, researchers at Tufts University School of Medicine and colleagues demonstrated a link between a predisposition to obesity and defective dopamine signaling in the mesolimbic system in rats. The new study at the University of Cambridge discovered that the anti-obesity drug sibutramine reduced brain responses in two regions of the brain, the hypothalamus and the amygdala, both of which are known to be important in appetite control and eating behavior. Their findings are reported today in The Journal of Neuroscienc
Can the Railroad Come Back?
October 27, 2010 03:52 PM - Andy Soos, ENN
At one time riding the rails was a delightful way to travel; quick and easy as well as a reasonable and profitable way to move goods. Something happened over the last 50 years. Some people objected to railroads as unsightly. They also became crowded and in many cases run down. A new report prepared by the Worldwatch Institute and the Apollo Alliance, Global Competitiveness in the Rail and Transit Industry, draws on lessons from dominant international rail manufacturing countries to conclude that greater investment in the U.S. rail industry could revive America’s former leadership in the world rail industry—and potentially create hundreds of thousands of jobs.