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Alpha Channel Defined

An extra 8-bit, grayscale channel in an image - often used for creating masks to isolate part of an image.

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Name Dropping, July 5, 2009: Santa Cruz touted to Michelle Obama

Published July 5, 2009, 1:41 am, Santa Cruz Sentinel

For the past few weeks, she has traversed Northern California, from Watsonville to Merced and to San Francisco, but with a purpose -- to plant the seed of Santa Cruz in the heart of our first lady Michelle Obama.

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Off-site Alpha Channel Links, User Submitted

The following links have been collected through user bookmark submission in the Alpha Channel category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.

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  • Parkinson's: Neurons Destroyed By Three Simultaneous Strikes: three molecules ? dopamine, a calcium channel, and a alpha-synuclei n ? act together to kill the neurons. neurons die because calcium channels lead to an increase of dopamine inside the cell; excess dopamine then reacts with alpha-synuclei n to form inactive complexes; the complexes gum up the cell's ability to dispose of toxic waste that builds up. The waste eventually kills the cell. neurons will survive if just one of the three factors is missing. It may be possible to save neurons and stop Parkinson' ;s disease by interfering with just one of the three factors. Most of dopamine inside the neurons is packaged into compartments that are shipped to the edge of the cell where the dopamine is released. The motor symptoms arise when the amount of dopamine released by the cells declines. L-DOPA improves symptoms by boosting the amount of dopamine released by the cells. Outside the compartments in the cell's cytoplasm, dopamine - in concert with calcium and alpha-synuclei n ? is toxic.

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