What is gigantism, if somebody with a over normal of growing more high this can be said as Gigantism. The scientist said that gigantism is because of there is a gigantic cell. Gigantic reproductive cells many times discover than the minute crustaceans that produce them. Now the scientist have discovered that octracods, or seed shrimp, have been cranking out these giant sperm for at least 100 million years.
Gigantism idea actially is useful if invented in plant or animals like chicken. May be you have known long time ago that a broiler chicken can grow faster than normal chiken. I think this is also the effect of gigantism growing. People want everything become faster than the normal, faster big, faster rich, and then faster to die.
Also we may have known of the geologist founding about a giant man of last thousand years ago, there are a giant people on that era, but this founding may be from abnormal people like now. This one also talk about a founding of gigantism fosil.
As an X-ray beam result through intact fossils, clearly show two large sperm pumps called Zenker organs. The pumps resemble those found in contemporary species of giant sperm-producing species of ostracods, which devote a third of their body volume to reproduction.
The female fossils, for their part, boast a pair of large seminal receptacles, which must have been filled with sperm in order to be preserved. Such story a long history for giant sperm of intense sexual competition between males. Female gather sperm from multiple males before fertilizing their eggs, but researchers don't have a clue what determines success. That is the story of science and technology development currently.
Friday, June 19, 2009
Monday, May 25, 2009
Resveratrol Keep Us Young
Resveratrol believe can make our body keep young, so many people are hunting for this materials. Resveratrol have effect to slow down of deterioration of our skin and body organ functional keep good, but is not right if can increase longevity of our age.
Scientist have studied, conducted and supported in part by the National Institute on Aging (NIA), part of the National Institutes of Health, is a follow-up to 2006 findings that resveratrol improves health and longevity of overweight, aged mice. The report confirms previous results suggesting the compound, found naturally in foods like grapes and nuts, may mimic, in mice, some of the effects of dietary or calorie restriction, the most effective and reproducible way found to date to alleviate age-associated disease in mammals. The researcher also emphasized, however, that their findings are based on research in mice, not in humans, and have no immediate and direct application to people, whose health is influenced by a variety of factors beyond those which may be represented in the animal models.
The study is a collaborative effort between the laboratories of Rafael de Cabo, Ph.D., of the Laboratory of Experimental Gerontology at the NIA; David A. Sinclair, Ph.D., of the Glenn Laboratories for Molecular Biology of Aging at Harvard Medical School; and an international group of researchers. The investigators compared mice fed a standard diet, a high-calorie diet, or an every-other-day feeding regimen with or without high- or low-dose resveratrol to study the impact of resveratrol on aging and health. In previous studies, different forms of dietary restriction, including every-other-day feeding, have been shown to improve markers of health.
A major finding of the study reported today is that resveratrol prevented age-related and obesity-related cardiovascular functional decline in the mice as determined by several parameters. Total cholesterol was significantly reduced in 22-month-old non-obese mice after 10 months of resveratrol treatment, although triglyceride levels had only a slight, non-significant trend toward a decrease. Further, the aortas of 18-month-old obese and non-obese mice treated with resveratrol functioned significantly better than untreated mice. Resveratrol also moderated inflammation in the heart.
Researchers still have much to learn before resveratrol can be recommended for human use. Basic questions of safety and biological effect in humans remain to be studied experimentally.
Resveratrol (trans-3,5,4'-trihydroxystilbene), a compound found largely in the skins of red grapes, is a component of Ko-jo-kon, an oriental medicine used to treat diseases of the blood vessels, heart and liver. It came to scientific attention only four years ago, however, as a possible explanation for the "French Paradox" -- the low incidence of heart disease among the French people, who eat a relatively high-fat diet. Today, it is touted by manufacturers and being examined by scientific researchers as an antioxidant, an anti-cancer agent, and a phytoestrogen. It is also being advertised on the Internet.
So don’t to rely on to this substance to make age longevity, the realize is that your age is your destiny, your age just in certain long time and will end when that time is come and you can’t avoid it.
Scientist have studied, conducted and supported in part by the National Institute on Aging (NIA), part of the National Institutes of Health, is a follow-up to 2006 findings that resveratrol improves health and longevity of overweight, aged mice. The report confirms previous results suggesting the compound, found naturally in foods like grapes and nuts, may mimic, in mice, some of the effects of dietary or calorie restriction, the most effective and reproducible way found to date to alleviate age-associated disease in mammals. The researcher also emphasized, however, that their findings are based on research in mice, not in humans, and have no immediate and direct application to people, whose health is influenced by a variety of factors beyond those which may be represented in the animal models.
The study is a collaborative effort between the laboratories of Rafael de Cabo, Ph.D., of the Laboratory of Experimental Gerontology at the NIA; David A. Sinclair, Ph.D., of the Glenn Laboratories for Molecular Biology of Aging at Harvard Medical School; and an international group of researchers. The investigators compared mice fed a standard diet, a high-calorie diet, or an every-other-day feeding regimen with or without high- or low-dose resveratrol to study the impact of resveratrol on aging and health. In previous studies, different forms of dietary restriction, including every-other-day feeding, have been shown to improve markers of health.
A major finding of the study reported today is that resveratrol prevented age-related and obesity-related cardiovascular functional decline in the mice as determined by several parameters. Total cholesterol was significantly reduced in 22-month-old non-obese mice after 10 months of resveratrol treatment, although triglyceride levels had only a slight, non-significant trend toward a decrease. Further, the aortas of 18-month-old obese and non-obese mice treated with resveratrol functioned significantly better than untreated mice. Resveratrol also moderated inflammation in the heart.
In addition to cardiovascular function, the scientists found resveratrol to have a variety of positive effects on other age-related problems in mice:
- Treated mice tended to have better bone health, as measured by thickness, volume, mineral content and density, and bending stiffness compared to the non-treated control group.
- At 30 months of age, resveratrol-treated mice were found to have reduced cataract formation, a condition found to increase with age in control-group mice.
- Resveratrol enhanced balance and motor coordination in aged animals. Scientists found significant improvement in performance at 21 and 24 months versus 15 months in the resveratrol-treated mice but not in the untreated mice.
- Resveratrol partially mimicked the effects of dietary restriction on the gene expression profiles of liver, skeletal muscle and adipose (fatty) tissue in mice.
- Along with determining the effect of resveratrol on the health of mice, scientists also studied the effect of resveratrol on longevity.
Researchers still have much to learn before resveratrol can be recommended for human use. Basic questions of safety and biological effect in humans remain to be studied experimentally.
Resveratrol (trans-3,5,4'-trihydroxystilbene), a compound found largely in the skins of red grapes, is a component of Ko-jo-kon, an oriental medicine used to treat diseases of the blood vessels, heart and liver. It came to scientific attention only four years ago, however, as a possible explanation for the "French Paradox" -- the low incidence of heart disease among the French people, who eat a relatively high-fat diet. Today, it is touted by manufacturers and being examined by scientific researchers as an antioxidant, an anti-cancer agent, and a phytoestrogen. It is also being advertised on the Internet.
So don’t to rely on to this substance to make age longevity, the realize is that your age is your destiny, your age just in certain long time and will end when that time is come and you can’t avoid it.
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