For each patient in the validation fold, we randomly selected 50% of their EHR features to infer their disease mixtures and then used the other 50% of the features to evaluate the log predictive likelihooda common metric to evaluate topic models 4,14,44 : where we inferred the variational expectations of the disease mixture and disease topics as: Sensible models should demonstrate improved predictive likelihood on held-out patients
So, the ethoxide is more stable, less reactive/active than the EtNH ion
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If it was exposed to heat during shipping or storage, or if it is well past its expiration date, the lyophilized powder may have undergone chemical changes that prevent proper dissolution
Expiration Dates: Even with proper storage, reconstituted peptides have a limited shelf life