The primary saccade was completed in advance of the object reaching the point of contact, and was best predicted by a first-order estimate learn more of TTC (TTC1). Participants then made their manual response, which was also best predicted by TTC1.
Therefore, object acceleration was not taken into account in either the ocular or manual response, with the latter occurring before the object reached the point of contact when it decelerated and after when it accelerated. Further analyses of the ocular and manual responses indicated no functional relationship and independent control. We suggest that the demand to make temporal estimates with a stationary location in PM tasks is critical in explaining the discrepancy with oculomotor research.”
“In this work, a simple set-up was designed, realized and tested to evaluate the effect of intestinal absorption on the in vitro drug release studies. The conventional USP-approved dissolution
apparatus 2 was equipped with an hollow PARP assay fibers filter, along with the necessary tubing and pumps, to simulate the two-fluids real behavior (the gastro intestinal lumen and the gastro intestinal circulatory system). The realized set-up was characterized in term of mass exchange characteristic, using the theophylline as the model drug, also with the aid of a simple mathematical model; then the release kinetics of a controlled release tablet was evaluated in the conventional test as well as in the novel simulator. The concentration of drug in the release compartment (which simulates selleckchem the gastric lumen) was found lower in the novel simulator than in the traditional one. (C) 2012 Elsevier B. V. All rights reserved.”
“Freeze drying is a suitable technique to improve the long-term storage
stability of colloidal drug carrier systems such as nanoparticles. Aim of this study was to systematically evaluate excipients for the freeze drying and long-term stability of albumin-based nanoparticles. In our study, nanoparticles made of human serum albumin (HSA) were freeze dried in the presence of different cryoprotective agents and after reconstitution were evaluated with regard to their physico-chemical characteristics. Empty, doxorubicin-loaded, and PEGylated nanoparticles were prepared and were freeze dried in the presence of different concentrations of sucrose, trehalose, and mannitol, respectively. The samples were physicochemically characterised with regard to lyophilisate appearance, particle size, and polydispersity using photon correlation spectroscopy. For evaluation of long-term stability, the samples were stored at 2-8, 25, and 40 degrees C over predetermined time intervals. In the absence of cryoprotectants, particle growth was observed in all freeze-dried formulations.