Di metal cyanide (DMC) catalyzed living polymerization is characterized by a) the “catch-up” kinetics with a length dependent propagation rate constant k P ≈ n − 2 (n: chain length), favoring growth of small molecules and b) segmental caused repeated attachment detachment growing end to catalyst site. Whereas inverse square law reduces polydispersity, in segments increases it. Analytic expressi...

The aim of this study was to prepare and characterize a self-emulsifying drug delivery system (SEDDS) with a high drug load of poorly water-soluble atorvastatin for the enhancement of dissolution and oral bioavailability. Solubility of atorvastatin in oil, surfactant, and cosurfactant was determined. Pseudo-ternary phase diagrams were constructed by the aqueous titration method, and formulation...

Background: Temperature rise in the pulp chamber is a severe stress that can cause irreversible damage to pulp. This study aimed evaluate effect of three curing modes high-powered LED and two remining dentin thicknesses on temperature under primary teeth dentin. Methods: One disc 1 mm thickness were prepared from human molar. The was exposed light using for 10 s simulate bonding agent polymeriz...

To reduce the surface and interfacial tension of the pollutants in environment, biosurfactants which are produced by the microorganisms such as bacteria, yeast etc. are being applied in large quantity. These compounds are produced extracellularly by the microorganism into the environment and they are applied in different industries such as detergent, cosmetics etc. for different purposes. In th...

Proteins are mostly used to stabilize food emulsions; however, production of protein containing emulsions is notoriously difficult to capture in scaling relations due to the complex behavior of proteins in interfaces, in combination with the dynamic nature of the emulsification process. Here, we investigate premix membrane emulsification and use the Ohnesorge number to derive a scaling relation...

Aqueous microdroplets provide miniaturized reaction compartments for numerous chemical, biochemical or pharmaceutical applications. We introduce centrifugal step emulsification for the fast and easy production of monodisperse droplets. Homogenous droplets with pre-selectable diameters in a range from 120 μm to 170 μm were generated with coefficients of variation of 2-4% and zero run-in time or ...

This work addresses the model-based optimization of the operation procedure of an emulsification process using a stirred vessel in combination with a colloid mill and a recycle. The computation of input trajectories (i.e. the stirrer and rotor speed in time), for reaching a certain predefined drop size distribution in minimal time, is studied. It is argued that gradient based optimization techn...