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Polydispersity

The polydispersity index is the ratio of the weight average molecular weight to the number average molecular weight. It indicates the distribution of individual molecular weights in a batch of polymers.

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Sanskrit language

... an exact translation would be "I pervade all this universe...". "mat-sthaani" in the second line is a compound of "mat" (me) and "stha" (standing, staying at) ...