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Explain the u like mostly in zoo.

Explain the u like mostly in zoo. 52MDp
The basis for whole animal bioassays as practised today was laid down by Paul Ehrlich in 1894. He introduced the concepts of a stable standard preparation and of the unit of activity as the activity of a defined mass of that standard preparation in the assay performed. Such assays have often provided a way of quantifying newly discovered active principles of biological origin, so that they could be applied in clinical medicine. Whole animal bioassays can be applied not only for the quantitative analysis of a biological product (analytical assays), but also for the comparison of different products intended for the same clinical indication (comparative or research assays). As such they have been the model for controlled clinical trial.
The basis for whole animal
bioassays
as
practised
today
was laid
down by Paul Ehrlich in 1894. He introduced the concepts of a stable standard preparation and of the unit of activity as the activity of a defined mass of that standard preparation in the assay performed. Such assays have
often
provided a way of quantifying
newly
discovered active principles of biological origin,
so
that they could
be applied
in clinical medicine. Whole animal
bioassays
can
be applied
not
only
for the quantitative analysis of a biological product (analytical assays),
but
also
for the comparison of
different
products intended for the same clinical indication (comparative or research assays). As such they have been the model for controlled clinical trial.
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