The flow field associated with the passage of the turbulent spot in a 3–D duct with streamline divergence under zero pressure gradients was investigated and displayed as contour plots of the velocity perturbation in plan and elevation view of the spot. It suggests that, streamline divergence has no strong effect on the internal structure of the spot and eddies and their propagation in the downs...

Bu çalışmada, taze roka salatasında bulunan polifenoloksidaz (PPO), dietilaminoetil selüloz (DEAE) ile doldurulmuş kolon üzerinden kısmen saflaştırılmıştır. Optimum sıcaklığı 30 °C ve pH 6.0 olarak bulunmuştur. Roka PPO, en yüksek substrat spesifikliğini kullanılan substratlar arasında kateşol göstermiştir. Askorbik asit, sistein, okzalik asit sitrik potansiyel inhbitörler test edilmiştir. En e...

Streamline methods for subsurface-flow simulation have received renewed attention as fast alternatives to traditional finite volume or finite element methods. Key aspects of streamline simulation are the accurate tracing of streamlines and the computation of travel time along individual streamlines. In this paper, we propose a new streamline tracing framework that enables the extension of strea...

Chitosan has been indicated as a safe and promising polycation vector for gene delivery. However its low transfection efficiency has been a challenging obstacle for its application. To address this limitation, we synthesized chitosan derivatives which had increasing amounts of diethylethylamine groups (DEAE) attached to the chitosan main chain. The plasmid DNA VR1412 (pDNA), encoding the ß-gala...

we derive error estimates in the appropriate norms, for the streamlinediffusion (sd) finite element methods for steady state, energy dependent,fermi equation in three space dimensions. these estimates yield optimal convergencerates due to the maximal available regularity of the exact solution.high order sd method together with implicit integration are used. the formulationis strongly consistent...