112409cap - -BPA-free products: still have chems w/...

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112409cap -the ability to make chemicals that have ability to bind estrogen receptors: beginning in 1930’s, 1940’s: plastics -plastic monomers, polymers, additives. Often have benzene ring w/ phenol group -moderately complex process of making plastic -1 plastic water bottle w/o ink on it: 10-30 chemicals -all of which can come out b/c can’t completely polymerize monomers and all additives put in, aren’t part of polymeric structure b/c not bound to anything -so what?—hormones operate at very low concentrations in the order of nanomolars, picomolars -on fetus, juvenile: very sensitive to hormones -so now response to natural hormones and also xenobiotic hormones -some foreign chemicals bind tighter to estrogen receptors than 17 beta estradiol -PET and PES to make hard, clear plastics --some FDA food contact approved antioxidants used in plastic formulations
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Unformatted text preview: -BPA-free products: still have chems w/ estrogenic effects-know tragedy of the commons-compares to now in that all sorts of products leak chems w/ estrogenic activity. Not 1 chemical/product is the cause, many different added up are the cause How do some of these different aspects of reproductive biology, what are their effects, prolifance in environment-- how does this all fit in? lateral pressure energy and total pressure energy difference-volume of flow per second (Q) = velocity of flow at some point x cross sectional area--Q1=Q2--lateral pressure energy: the force that is exerted against the walls of the container-varies w/ height--potential energy is equal and opposite in of the height of column of water--energy that you could get if you converted potential energy into another kind of energy...
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