18. October 2016

Purpose The present study details characterisation of the electrostatic properties of a range of active pharmaceutical ingredients (APIs) and blends and investigates the role of electrostatics as a potential root cause of punch sticking during tabletting. Methods Microcrystalline cellulose (AVICEL® PH-102) and magnesium stearate were used to prepare blends of constant drug loading (10% w/w) with a range of APIs. The electrostatic properties of the APIs and blends were then determined using a...

23. June 2016

Abstract The objective of this study was to design a novel polyethylene glycol (PEG) derivative exhibiting mucus permeating and mucoadhesive properties. Therefore, the enzymatically degradable phosphate ester, phosphotyrosine (Ptyr) was covalently attached to PEG-diamine. The synthesized PEG-Ptyr was studied in terms of enzymatic degradability on Caco 2 cells and by isolated intestinal alkaline phosphatase (IAP). Furthermore, the influence of enzymatic degradation on charge distribution of the...