you *cannot* "contaminate proteins"! what contamination in the context of stem cells is that cells may become differentiated due to the way how they're cultured. the essence of a stem cell is that its undifferentiated cell and has a potential to transform to any cell type (muscle, brain, cardiac, liver, etc). With time these cells may loose this totipotency, or their ability to turn into any cell type.
Contamination has nothing to do with culturing stem cells in heterologous medium!
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you *cannot* "contaminate proteins"! what contamination in the context of stem cells is that cells may become differentiated due to the way how they're cultured. the essence of a stem cell is that its undifferentiated cell and has a potential to transform to any cell type (muscle, brain, cardiac, liver, etc). With time these cells may loose this totipotency, or their ability to turn into any cell type. Contamination has nothing to do with culturing stem cells in heterologous medium!
just export it to PDF with OOo and you'll get a 'read only' document.
do a google search on "volumetric displays"
why is it such a great accomplishment?