Dictionary » V » Vis



1. Force; power.

2. Physical force. Moral power.

(Science: physiology) principle of vis viva, living force; the force of a body moving against resistance, or doing work, in distinction from vis mortua, or dead force; the kinetic energy of a moving body; the capacity of a moving body to do work by reason of its being in motion. See kinetic energy, in the note under Energy. The term vis viva is not usually understood to include that part of the kinetic energy of the body which is due to the vibrations of its molecules.

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Video: electroporation in zebrafish tails

Anyone for a video? Hyde DR, Godwin AR, Thummel R. In vivo Electroporation of Morpholinos into the Regenerating Adult Zebrafish Tail Fin. J Vis Exp. 2012;(61):e3632 DOI: 10.3791/3632 http://www.jove.com/video/3632/in-vivo-electroporation-of-morpholinos-into-the-regenerating-adult-zebrafish-tail-fin

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by jonmoulton
Thu Mar 29, 2012 8:00 pm
Forum: Molecular Biology
Topic: Video: electroporation in zebrafish tails
Replies: 0
Views: 886

brown substance without UV/VIS spectra

This is rather chemical/physical problem, but maybe someone of you may have some suggestion. The thing is we have a substance isolated from plant being white, the spectrum has two maxima in UV (<300nm), but when the substance was synthesized by chemists, it is brown. However, the spectrum is exac...

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by JackBean
Fri Feb 03, 2012 5:44 pm
Forum: General Discussion
Topic: brown substance without UV/VIS spectra
Replies: 0
Views: 747

beers law concentration calculation

... the entire question, I want to see if you guys get the same answer as me. When a pure peptide containing 3 Trp, 6 Tyr, and 1 Phe is placed in a UV/Vis spectrometer, the absorbance measured is 0.57. If there is 1mL of solution in a 1cm path-length cuvette, calculate the approximate concentration ...

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by protchem12
Mon Jan 16, 2012 3:37 am
Forum: Molecular Biology
Topic: beers law concentration calculation
Replies: 8
Views: 6122

Re: thin layer chromatography

If you've easy access to a UV-Vis spec, you could scrape off the bands, elute them and take some spectra -- then assign the kids into the literature to find likely candidates. It could get complicated if some pigments are co-migrating, but ...

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by jonmoulton
Mon Nov 28, 2011 10:45 pm
Forum: Molecular Biology
Topic: thin layer chromatography
Replies: 4
Views: 2158


... - that is why I recapped the angle of the organism's development and history. Here: If you take things for medical examination out of context (vis a vis it's development), you could say something has bad design. Considering how it could have got that way, is the part that confers some useful ...

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by Crucible
Sun Nov 06, 2011 11:22 pm
Forum: Evolution
Topic: Evolution of the nervous system
Replies: 14
Views: 7044
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