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Unaltered deep-sea basaltic g lasses are believed to be the best record of initial magma composition , and as such are important in the study of petrogenesis. However , these glasses are altered by their long contact ...

N-Alkyl amides undergo photodecomposition much slower than their ketone, ester, and aldehyde analogs . The Norrish Type II process in amides is also less important than in these other classes of compounds due to electronic ...