12 JAN 2018 by ideonexus

 Neurons Use Viruses to Share Information and Learn

When genes are activated, the instructions encoded within their DNA are first transcribed into a related molecule called RNA. Shepherd’s colleague Elissa Pastuzyn showed that the Arc shells can enclose RNA and move it from one neuron to another. And that’s basically what retroviruses do—they use protein shells to protect their own RNA as it moves between cells in a host. So our neurons use a repurposed viral gene to transmit genetic information between each other in an oddly virus-like...
Folksonomies: dna neurons virus microbiology
Folksonomies: dna neurons virus microbiology
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25 MAY 2017 by ideonexus

 Nicotinamide riboside (NR) Increases NADP

In the first controlled clinical trial of nicotinamide riboside (NR), a newly discovered form of Vitamin B3, researchers have shown that the compound is safe for humans and increases levels of a cell metabolite that is critical for cellular energy production and protection against stress and DNA damage. Studies in mice have shown that boosting the levels of this cell metabolite—known as NAD —can produce multiple health benefits, including resistance to weight gain, improved control of bl...
Folksonomies: longevity supplements
Folksonomies: longevity supplements
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18 JAN 2017 by ideonexus

 Falacy of Seeking Too Much Purpose in Evolutionary Adapta...

Darwin’s concept of evolution is centered on natural selection, or survival of the fittest [1]. Although Darwin did realize that organisms possess structures and even entire organs that might not have an extant function, as is the case of rudiments [2], on the whole, selectionist thinking has heavily dominated the biological literature ever since. In its extreme but not uncommon form, the selectionist, or adaptationist, paradigm perceives every trait as an adaptation. Under this view of bio...
Folksonomies: evolution meaning
Folksonomies: evolution meaning
  1  notes
 
18 JAN 2017 by ideonexus

 Using Feedback to Control Weight

Recent research has shown that exhaust from lungs (part of excretion) is a major factor in weight loss. Burning 10 kg human fat requires inhalation of 29 kg oxygen. This produces 28 kg carbon dioxide and 11 kg water. As food and drinks are temporarily stored in the human stomach and bowels, the body weight is instantaneously increased with the weight of any food or drink consumed. Metabolism is usually divided into catabolism and anabolism, where catabolism is the process of breaking down ...
Folksonomies: health diet weight loss
Folksonomies: health diet weight loss
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