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sexta-feira, 8 de março de 2013

FUNNY ! BUT ...DANGEROUS !!!

Or should it be ... DANGEROUS ...BUT FUNNY !?
Gybbon's arm-hanging, hand-swinging method of movement, known as brachiation, makes this ape as probably the best acrobat in the world. Hylobates lar may be this naughty individual shown in the video, taunting two young tigers:

http://www.youtube.com/watch?v=fPXkUXXFoCw&feature=youtube_gdata_player


segunda-feira, 25 de fevereiro de 2013

WHY NOT IN NORTHEAST BRAZIL???


Our products : range


The completion of the fifth generation of air condensation water production systems enabled Eole Water to develop a range of products adapted to customer requirements: water production, energy independence, low maintenance, logistical flexibility, no environmental impact. Each part has been carefully designed to ensure that Eole Water’s products are the strongest and most innovative today.

The WMS1000 in figures€2M of R&D investment
23 engineers
32 industrial partners
2 patents
Are you interested ?
Contact us

The WMS1000 Wind Turbine

For nearly 15 years, Eole Water team has been working on the development of the WMS1000 wind turbine. This technology has been designed around three major principles:

To offer a sustainable access to safe drinking water

Unlike wells or boreholes, water is always present in the air. The constraint has been to design a reliable technology able to create and collect the water. Thanks to its technical expertise and its high quality components, the WMS1000 wind turbine allows people living in remote areas to benefit from access to safe water for a period of twenty years. The device is capable of producing up to 1,200 liters of water a day.

To operating in completely autonomy

The WMS1000 Wind Turbine has been designed to produce water without any external power source. Wind is the only energy used. With an installed capacity of 30kW and using air as a source of water, the WMS1000 Wind Turbine is perfectly adapted to supplying remote areas completely devoid of any existing infrastructure.

To preserve the environment

Eole Water wanted to offer an innovative technology in line with present-day sustainable development requirements. Wind power is the only source of energy needed to run the water production turbines. No CO2 is released, not groundwater or surface water is pumped. The environmental impact is practically nil.

sábado, 9 de fevereiro de 2013

HOW SALMON MAKE LONG JOURNEY HOME


[Reproduced from BBC]

7 de fevereiro de 2013 14h42 By Helen Briggs BBC News

Salmon use the Earth's magnetic field to navigate across the ocean as they return to their home rivers to breed, research suggests.

Each year millions of fish make the journey home in one of the toughest migrations of the animal kingdom.

The memory of the magnetic field where they first entered the sea helps them find their way back, say US scientists.

The data, in Current Biology, provide the first direct evidence that salmon use geomagnetic cues in migration.

Other marine animals, including turtles and seals, may also use the same homing mechanism, say researchers.

Extreme journey

The journey of adult sockeye salmon from the northern Pacific Ocean back to the individual freshwater rivers of their birth is one of the toughest migrations of all animals.

There are several theories for how salmon locate their nurseries after spending years out at sea.

One hypothesis, known as natal homing, is that salmon use both chemical and geomagnetic cues to find their way home.

In order to test the theory, researchers studied fisheries data spanning 56 years charting the return of salmon to the Fraser River in British Columbia.

The route the fish chose to swim around Vancouver Island matched the intensity of the geomagnetic field near their home rivers.

Nathan Putman, a researcher at Oregon State University, told BBC News: "For salmon to find their way back home, they remember the magnetic field that exists where they first enter the sea as juveniles, and once they reach maturity, they seek that same coastal location, with the same magnetic field.

"In other words, salmon remember the magnetic field where they enter the ocean and come back to that same spot once they reach maturity."

Sea turtles, elephant seals and many other fish, including eels, tuna and sturgeon, have a similar migratory strategy, he added.

"It seems unlikely that salmon are the only ones who've come up with this really good idea for finding your way home - it likely evolved in multiple lineages."

Exactly how the fish "imprint" the magnetic field near where they were born is unknown, but the scientists believe the change from fresh to saltwater triggers some kind of neurological process.

The memory helps the fish find its way back to the mouth of its home river, and from there it uses chemical cues to locate its birth stream.

Geomagnetic cues

James J Anderson and Chloe Bracis of the University of Washington say the work supports recent modelling studies showing geomagnetic imprinting is feasible to return salmon to their home river. It also complements laboratory findings that trout olfactory systems can detect geomagnetic fields.

Commenting on the study, they said: "The authors build on a long series of their work on the navigation of marine animals and provide the first solid evidence that salmon use geomagnetic cues to direct their oceanic migration."

The researchers plan to carry out lab research to find out more about how salmon navigate through magnetic fields. This may eventually prove useful for commercial fisheries, they say.

BBC © 2013

domingo, 27 de janeiro de 2013

"REBOUND EFFECT" UNDER INCREASED ENERGY EFFICIENCY


[Reproduced from SCIENTIFIC AMERICAN]


Does Increased Energy Efficiency Just Spark Us to Use More?



chevy-volt-fuel-economy-stickerLast year, the U.S. raised its fuel economy standards for cars and trucks for the first time in decades. By 2025, the fuel efficiency of vehicles will be required to double. As a result, oil consumption is predicted to fall and—given that the U.S. remains the world’s largest consumer of oil—global crude prices might fall as well. That makes using oil cheap again, encouraging yet more consumption that ends up reducing the energy saving impact of the initial policy.
That is the story of the so-called “rebound effect,” more properly called Jevons paradox, after W. Stanley Jevons, the British economist who first proposed it in his 1865 book “The Coal Question.” Jevons paradox is undoubtedly real and has to be considered in any energy efficiency policy. After all, the last time the U.S. raised its fuel economy standards significantly in the late 1970s, global oil prices cratered not too long thereafter in the early 1980s. Or consider the refrigeration paradox: freezers have become better and better at using less energy to keep food cold. As a result, many Americans now have two: a modern, efficient one in the kitchen for comestibles and the old fridge in the garage or basement to keep the beer cold and freeze extra supplies.
But, although the rebound effect may be real, it is “too small to derail energy-efficiency policies,” argues a team of four economists in a comment published in Nature on January 24. (Scientific American is part of Nature Publishing Group.) Using data from the Energy Information Administration’s annual forecast, the researchers estimate that the rebound effect will reduce energy savings from the new fuel efficiency standards to 5 percent from 7 percent.
The economists take care to note the distinction between direct and indirect effects. So, for example, savings on fuel leads to an increase in driving, eliminating nearly a third of the efficiency savings. At the same time, money not spent on fuel is then often spent on other items that in turn require energy to produce—causing an indirect drop of five to 15 percent. Finally, at the scale of the national and global economy, oil not used in cars in the U.S. will be used in cars in China, along with other displacement effects.
[...continued in the site indicated above]

domingo, 20 de janeiro de 2013

SALAMANDER + ALGAE = CURIOUS SYMBIOSIS


[Reproduced from THE  JOURNAL OF EXPERIMENTAL BIOLOGY, after New Scientist]

Intracapsular algae provide fixed carbon to developing embryos of the salamanderAmbystoma maculatum

  1. Robert W. Sanders1
+Author Affiliations
  1. 1Department of Biology, Temple University, Philadelphia, PA 19122, USA
  2. 2Department of Public Health, Temple University, Philadelphia, PA 19122, USA
  3. 3Berkeley Initiative in Global Change Biology, University of California, Berkeley, CA 94720, USA
  1. * Author for correspondence (erin.r.graham@temple.edu)
  • Received June 25, 2012.
  • Accepted September 10, 2012.

SUMMARY

Each spring, North American spotted salamander (Ambystoma maculatum) females each lay hundreds of eggs in shallow pools of water. Eggs are surrounded by jelly layers and are deposited as large gelatinous masses. Following deposition, masses are penetrated by a mutualistic green alga, Oophila amblystomatis, which enters individual egg capsules, proliferates and aggregates near the salamander embryo, providing oxygen that enhances development. We examined the effects of population density of intracapsular O. amblystomatis on A. maculatum embryos and show that larger algal populations promote faster embryonic growth and development. Also, we show that carbon fixed by O. amblystomatis is transferred to the embryos, providing the first evidence of direct translocation of photosynthate from a symbiont to a vertebrate host.
NB  The embryos release waste material, which the algae feed on. In turn the algae photosynthesise and release oxygen, which the embryos take in. Embryos that have more algae are more likely to survive  and develop faster than embryos with few or none.

quarta-feira, 16 de janeiro de 2013

IN THE STATE OF ACRE, BRAZIL ...

Trying to make standing forest more valuable than logging or ranching.
[From THE ECONOMIST]

http://db.tt/PirL72mo