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Types of Nasal Sprays and Their Testing Implications Nasal spray formulations fall into two primary categories, each with distinct testing requirements: Solution nasal sprays: The active ingredient is fully dissolved in the aqueous carrier
After washing with phosphate buffer saline, endogenous peroxidase was inactivated using 3% hydrogen peroxide in absolute methanol for 5 min at room temperature
If particles remain after 5 minutes of gentle swirling, the peptide may be degraded
Kiyokawa, H
An additional set of aromatic amides with unknown in vivo metabolism were selected using a systematic approach to investigate substituent effects of e.g., electron withdrawing (-NO 2 , -F) and electron donating groups (-OH, -CH 3 ) which were varied between compounds around the formanilide ring ( ortho -, meta - and para - to the amide bond) for future quantitative structure-activity relationship (QSAR) modelling
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