Welcome to Bio181L!. Contemplating the nuts & bolts of Life xVivo’s 3D cell animation (also on TA desktop--Lab01TaoTA => Biovisions => BioVisionsPlayer.swf). About me. Kelsey Berg [email protected] Majors in Physiology/Molecular and Cellular Biology, Minor in Chemistry
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*http://blc.arizona.edu/courses/181Lab (Lab Man yellow page)
When a journalist asked the great physicist Richard Feynman what single sentence would best encapsulate all science so far if it were to be the sole surviving scrap of all we knew, he replied,“The world is made of atoms.”
From The Secret of Scent, Luca Turin p.28
What cannot be done with assemblages of these atoms* cannot be doneby living organisms, nor their cells, nor their spit, etc.
*OK, fine, there’s the occasional role for Ca++, etc.
Freeman Fig. 2.1a
(There will be a test)
See lab manual, p. 0-3
To your StructViewers!
Desktop => Bio181L_Go
It’s a real term; used to refer to a situation where the addition of salt (portable charges) alters the solubility of other molecules in water
Why should this be?
First things first--what is it? What’s going on in terms of molecules
Experiment: Ethanol and water on your arm: which is cooler & why?
Prediction: based on molecular weight, which should evaporate more quickly--H2O (2 x 1 + 1 x 16) or CH3CH2OH (5 x 1; 2 x 12; 1 x 16)
If not, why not?
Salt--ever tasted your sweat? Or anybody else’s for that matter?
What benefit might there be to adding NaCl to water that you are intending to evaporate?
Next week’s quiz will include
Concepts from today
Deducing partial charges (from tutorial)
Manual Ch. 2