Dictionary » T » Tones

Tones

tone

1. The normal degree of vigour and tension, in muscle, the resistance to passive elongation or stretch, tonus.

2. A particular quality of sound or of voice.

3. To make permanent or to change, the colour of silver stain by chemical treatment, usually with a heavy metal.

Origin: Gr. Tonos, L. Tonus


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Re: Vitamin D absorption for different skin types

... just beginning to draw research interest. Darker skin evolved in high light-exposure populations to protect deeper skin layers from UV damage, but tones lightened in pops with lower exposure, to allow enough UV to reach the D-generating skin tissues. Dark-skinned people in lower-light areas almost ...

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by Darby
Tue Jul 15, 2014 7:39 pm
 
Forum: Human Biology
Topic: Vitamin D absorption for different skin types
Replies: 1
Views: 752

Vitamin D absorption for different skin types

... was reading an article and which mentioned how people with lighter skin synthesise vitamin D from the sun more easily than people with darker skin tones. I tried to look into this but i couldn't find an answer so i thought somewhere like here would be a good place to start. So my question is if ...

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by Piggis
Tue Jul 08, 2014 10:29 pm
 
Forum: Human Biology
Topic: Vitamin D absorption for different skin types
Replies: 1
Views: 752

How the brain interprets reality.

... sees a mixture of grays as well as some green. Finally a Human Being walks in and he sees The Mona Lisa in a multitude of colours. Browns, skin tones, a bit of dark amber, some blue hues in the back ground etc. The question to ask then is which of these realities is the TRUE reality? what is ...

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by CheyenneAlvis
Thu Jun 13, 2013 11:29 am
 
Forum: Human Biology
Topic: How the brain interprets reality.
Replies: 1
Views: 1404

Re: Green mammals

... is oddly overlooked is our own species, homo sapiens. It is not uncommon for southern Europeans, Middle Easterners, or North Africans to have skin tones that appear somewhat 'green' on color (hence the term "olive skin"). Again, however, truth be told, in my experience most 'olive skinned' ...

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by biotag
Sat Sep 15, 2012 6:45 pm
 
Forum: Zoology Discussion
Topic: Green mammals
Replies: 11
Views: 15121

Re: weight lifting, repetitions & evolution theory

... but the adaptation to adapt — for example, the ability of some animals to change their coats in response to environment. Humans (of certain tones) can "change" our skin with the practice of tanning. By extension from this principle, human muscles can survive a fair amount of use, ...

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by Lenoxus
Mon Apr 26, 2010 12:08 am
 
Forum: Evolution
Topic: weight lifting, repetitions & evolution theory
Replies: 6
Views: 8703
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