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29. November 2017
Purpose Characterisation of powder flow is important for pharmaceutical processing and manufacturing. This work aims at a better understanding of how fractal particle and bulk properties affect the static and dynamic flow of excipients. Methods Traditional methods of flowability testing, e.g. the angle of repose or the flow through an orifice, were complemented by avalanching in a rotational drum. Dynamic image analysis provided a fractal contour line dimension of the powder bulk in the drum...
27. February 2017
Abstract: The main challenges facing efforts to prevent the transmission of human immunodeficiency virus (HIV) are the lack of access to sexual education services and sexual violence against young women and girls. Vaginal formulations for the prevention of sexually transmitted infections are currently gaining importance in drug development. Vaginal mucoadhesive tablets can be developed by including natural polymers that have good binding capacity with mucosal tissues, such as chitosan or guar...
03. January 2017
Abstract Understanding interparticle interactions in powder systems is crucial to pharmaceutical powder processing. Nevertheless, there remains a great challenge in identifying the key factors affecting interparticle interactions. Factors affecting interparticle interactions can be classified in three different broad categories: powder properties, environmental conditions, and powder processing methods and parameters. Although, each of these three categories listed is known to affect...
08. February 2016
Biopolymers such as tragacanth, an anionic polysaccharide gum, can be alternative polymeric carrier for physiologically important peptides and proteins. Characterisation of tragacanth is thus essential for providing a foundation for possible applications. Rheological studies colloidal solution of tragacanth at pH 3, 5 or 7 were carried out by means of steady shear and small amplitude oscillatory measurements. Tragacanth mucoadhesivity was also analysed using an applicable rheological method and...