"You sure got out of that tree fast son."
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Sabtu, 26 Maret 2011
Sabtu, 29 Januari 2011
Reduced Lung Fuction Due to Vitamin D Deficency in Dark Skinned People
No wonder West Indians had a rough time when they moved to the UK in the mid-twentieth century: with the polluted atmosphere common at that time many suffered from a vitamin D deficiency. Their children born in the UK had more problems than their parents because growing up in a sun depleted climatic environment with a dark skin led to long term lung problems.
Australian research shows the lack of vitamin D leads to altered lung structure, with the lungs partially shutting down. In adult life people of West Indian heritage have decreased lung function.
Mice were tested with some being made deficient in vitamin D while others had an adequate level. Tests with a plethysmograph showed lung obstruction was markedly greater in mice lacking vitamin D. Overall, lung volume was reduced. Lungs were also smaller than average.
It was unclear as to whether the problem was basically due to heritage, or mothers being deficient during pregnancy, because test mice had to be bred to have low sun-to-vitamin D conversion.
Australian research shows the lack of vitamin D leads to altered lung structure, with the lungs partially shutting down. In adult life people of West Indian heritage have decreased lung function.
Mice were tested with some being made deficient in vitamin D while others had an adequate level. Tests with a plethysmograph showed lung obstruction was markedly greater in mice lacking vitamin D. Overall, lung volume was reduced. Lungs were also smaller than average.
It was unclear as to whether the problem was basically due to heritage, or mothers being deficient during pregnancy, because test mice had to be bred to have low sun-to-vitamin D conversion.
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~~~~~Health~~~~~
Rabu, 06 Oktober 2010
The Danger of Nuclear Power Stations
Countries are going ahead with investment in nuclear power despite very real dangers. Similar crises to Chernobyl and Three Mile Island will definitely occur in the future with catastrophic results for resident of neighboring nations of the country experiencing the problem.
Where are they going to put the contaminated material after use? Putting it deep under landfill and into natural cavities in the earth have failed in the past. The only answer is to launch it into space on a trajectory to the sun. But what if the rocket explodes in the earth's atmosphere or crashes to earth?
Nuclear power is also very expensive. It is too high a price to pay to reduce green house gas pollution. Electricity charges are already going through the roof in Australia and the green tax hasn't even been instituted yet.
There is no way the use of uranium purchased from countries such as Australia can be policed. Once another country owns the uranium it can use it for military purposes, though all nuclear weaponry so far produced in the world have come from military dedicate nuclear facilities.
Where are they going to put the contaminated material after use? Putting it deep under landfill and into natural cavities in the earth have failed in the past. The only answer is to launch it into space on a trajectory to the sun. But what if the rocket explodes in the earth's atmosphere or crashes to earth?
Nuclear power is also very expensive. It is too high a price to pay to reduce green house gas pollution. Electricity charges are already going through the roof in Australia and the green tax hasn't even been instituted yet.
There is no way the use of uranium purchased from countries such as Australia can be policed. Once another country owns the uranium it can use it for military purposes, though all nuclear weaponry so far produced in the world have come from military dedicate nuclear facilities.
Selasa, 25 Mei 2010
Jumat, 26 Maret 2010
Kamis, 04 Februari 2010
Bull Ants Feed at Twilight
Bull ants do not feed during all daylight hours. Observation has shown that they feed at twilight. When the sun is brighter for longer, for example in summer or there is no cloud cover, they forage for food later in the day. When the sun is darker, earlier, they search for food sooner in the day. It was believed that all insects fed according to circadian rhythms, but this does not seem to be the case.
Activity in the nest was affected by cloud cover. But outside activity that involves feeding occurs at twilight. Obviously, they are feeding during these short intervals to avoid predators. Most animals that eat ants would be inactive at twilight.
Tests were done at ANU in Canberra. Bull ants were put in containers where diffused light was altered. It was found they only fed when the light was set at a particularly low level. Evolution does take some winding paths. This shows though that evolution develops in a rational way.
Activity in the nest was affected by cloud cover. But outside activity that involves feeding occurs at twilight. Obviously, they are feeding during these short intervals to avoid predators. Most animals that eat ants would be inactive at twilight.
Tests were done at ANU in Canberra. Bull ants were put in containers where diffused light was altered. It was found they only fed when the light was set at a particularly low level. Evolution does take some winding paths. This shows though that evolution develops in a rational way.
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