24 DEC 2013 by ideonexus
Partially Diminished Fraction of Ecosystems
Do you know the PDF of your shampoo? A PDF refers to a “partially diminished fraction” of an ecosystem, and if your shampoo contains palm oil cultivated on clear-cut jungle in Borneo, say, that value will be high. How about your shampoo’s DALY? This measure comes from public health: “disability-adjusted life years,” or the amount of one’s life that will be lost to a disabling disease because of, say, a lifetime’s cumulative exposure to a given industrial chemical. So if your fav...Folksonomies: environmentalism entropy
Folksonomies: environmentalism entropy
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notes
notesDaniel Goleman explains a concept for thinking about how our lives contribute to the increase of entropy in our biosphere.
12 APR 2013 by ideonexus
Autism as a Self-Fulfilling Prophecy
Diseases and other medical conditions can also have this self-fulfilling property. When medical conditions are widely discussed in the media, people are more likely to identify their symptoms, and doctors are more likely to diagnose (or misdiagnose) them. The best-known case of this in recent years is autism. If you compare the number of children who are diagnosed as autistic64 to the frequency with which the term autism has been used in American newspapers,65 you’ll find that there is an a... 1 notes
notesAs the illness gets more attention, more people are diagnosed with it.
09 JUN 2012 by ideonexus
The Wonders of Science
The steam-engine in its manifold applications, the crime-decreasing gas-lamp, the lightning conductor, the electric telegraph, the law of storms and rules for the mariner's guidance in them, the power of rendering surgical operations painless, the measures for preserving public health, and for preventing or mitigating epidemics,—such are among the more important practical results of pure scientific research, with which mankind have been blessed and States enriched. 
1 A survey of them and how the improve the quality of life in the 1850s.
14 JAN 2012 by ideonexus
A Early Definition of Human Social Progress
Disease is largely a removable evil. It continues to afflict humanity, not only because of incomplete knowledge of its causes and lack of individual and public hygiene, but also because it is extensively fostered by harsh economic and industrial conditions and by wretched housing in congested communities. ... The reduction of the death rate is the principal statistical expression and index of human social progress. It means the saving and lengthening of lives of thousands of citizens, the ext...That emphasizes a reduction in the death rate and argues that this is something we can do through education and improving the quality of life.
30 SEP 2011 by ideonexus
Exercise Increases the Number of Mitochondria in Brain Ti...
Past experiments have shown persuasively that exercise spurs the birth of new mitochondria in muscle cells and improves the vigor of the existing organelles. This upsurge in mitochondria, in turn, has been linked not only to improvements in exercise endurance but to increased longevity in animals and reduced risk for obesity, diabetes and heart disease in people. It is a very potent cellular reaction.
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Like muscles, many parts of the brain get a robust physiological workout during exer...A study on mice finds that exercise increases the production of mitochondria in brain tissue in addition to their production in muscle tissue (I dig the term "mitochondrial biogenesis" as describing the benefit).
08 JUN 2011 by ideonexus
More Females are Born in Times of Stress
A stress-related decline in the sex ratio is no anomaly, but a biological mechanism that evolved to keep the species going, according to Ralph Catalano, professor of public health at the University of California, Berkeley. “From an evolutionary perspective, in stressful eras it’s a smarter bet to have a female child than a male child. A daughter is more apt to provide you with grandchildren,” Catalano tells me. In hard times, he explains, weak males are less likely to survive and to rep...Folksonomies: pregnancy fetal development
Folksonomies: pregnancy fetal development
1 notes
notesIt makes sense evolutionarily to have females during times of stress as males are less likely to survive.
04 MAY 2011 by ideonexus
Science Saves Lives
Even at its best, pre-modern medical practice did not save many. Queen Anne was the last Stuart monarch of Great Britain. In the last seventeen years of the seventeenth century, she was pregnant eighteen times. Only five children were born alive. Only one of them survived infancy. He died before reaching adulthood, and before her coronation in 1702. There seems to be no evidence of some genetic disorder. She had the best medical care money could buy.
Diseases that once tragically carried off...You can pray over a sick person, or give them medicine. All the ways medical science has reduced mortality.
15 APR 2011 by ideonexus
A Positive Outlook Extends Lifespan
I define it loosely as the ability to bounce back from stress. Many scientists view this solely as biological stress. But many of us who care for older patients see adaptive competence as psychologically critical as well.
You don't get to be 109 without life hurling a few curveballs at you, and Reichert has had more than her share: bereavement, gender discrimination, medical issues. And after each, she dusts herself off and moves on.
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My colleague Becca Levy, a professor of epidemiolo...Controlling for other factors, having a positive attitude about life and progressing forward despite setbacks extends one's lifespan.
