Some plant extracts showed the ability to retard the diffusion of glucose across the dialysis tube. The present study was designed to investigate the effect of aqueous and ethanolic extracts of Teucrium polium (T. polium) on glucose movement across the dialysis tube. The T. polium powder was dissolved in ethanol and distilled water. Then glucose was added to make a final concentration of 0.2 – ...

An enzymatic biofuel cell is integrated on a screen-printed electrode as basis for self-powered biosensor. A glucose/O2 consisting of pyrroloquinoline quinone-dependent glucose dehydrogenase embedded within an Os-complex modified redox polymer bioanode to oxidize and non-limiting bilirubin oxidase-based gas diffusion biocathode in the direct-electron transfer regime reduction O2 showed glucose-...

The transmembrane movement of radiolabeled, nonmetabolizable glucose analogs in Streptococcus mutans Ingbritt was studied under conditions of differing transmembrane electrochemical potentials (A*) and pH gradients (ApH). The ApH and A* were determined from the transmembrane equilibration of radiolabeled benzoate and tetraphenylphosphonium ions, respectively. Growth conditions of S. mutans Ingb...

Topical trans-dermal delivery of drugs has proven to be a promising route for treatment of many dermatological diseases. The aim of this study is to monitor and quantify the permeability rate of glucose solutions in rhesus monkey skin noninvasively in vivo as a primate model for drug diffusion. A time-domain Optical Coherence Tomography (OCT) system was used to image the diffusion of glucose in...

We calculated the implications of diffusion for the phosphoenolpyruvate:glucose phosphotransferase system (glucose-PTS) of Escherichia coli in silicon cells of various magnitudes. For a cell of bacterial size, diffusion limitation of glucose influx was negligible. Nevertheless, a significant concentration gradient for one of the enzyme species, nonphosphorylated IIA(Glc), was found. This should...

Background: SturgeeWeber syndrome (SWS) with unilateral hemispheric involvement is a clinical model of early onset, chronic, often progressive hemispheric injury, resulting in variable neuro-cognitive impairment. Aims: To evaluate if abnormal diffusion and metabolism of the thalamus, a central relay station with extensive cortical connections, may serve as a simple imaging marker of neuro-cogni...