BACKGROUND Whispering gallery modes (WGM) biosensors are ultrasensitive systems that can measure amount of adsorbed layer onto the micro-cavity surface. They have many applications including protein, peptide growth, DNA and bacteria detection, molecular properties measurements and specific interaction and drug table recognitions due to their high sensitivity, compact size and label free sensing...

In this paper, we study Markov fluid queues where the net fluid rate to a single-buffer system varies with respect to the state of an underlying continuous-time Markov chain. We present a novel algorithmic approach to solve numerically for the steady-state solution of such queues. Using this approach, both infiniteand finite-buffer cases are studied. We show that the solution of the infinite-bu...

Preparation of Enzyme SolutionsRabbit muscle glyceraldehyde-3-phosphate dehydrogenase was prepared as described previously (1) and stored at 0” as the crystalline suspension. For use, the crystals were separated by centrifugation and dissolved in buffer. The resulting solution was dialyzed overnight against a flowing stream of buffer in order to remove the ammonium sulfate, equilibrated against...

BACKGROUND The Krebs-Henseleit buffer is the best perfusion solution for isolated mammalian hearts. We hypothesized that a Krebs-Henseleit buffer-based cardioplegic solution might provide better myocardial protection than well-known crystalloid cardioplegic solutions because of its optimal electrolyte and glucose levels, presence of buffer systems, and mild hyperosmolarity. METHODS Isolated L...

The role of pH, citrate buffer, and urea were investigated in the suicidal destruction of Helicobacter pylori, with particular reference to the organism's urea and ammonia metabolism. The median five minute survival of H pylori in the presence of 50 mmol/l urea in 0.2 M citrate buffer at pH 6.0 was only 14%, compared with 53% in the same solution at pH 7.0. The median amount of ammonium release...

the voltammetric behaviour of sulfadoxine (sdn) was studied at a glassy carbon electrode in 0.2 m phosphate buffer solutions using cyclic, differential-pulse (dpv) and square wave voltammetry (swv). the dependence of the current on ph, concentration, and scan rate was investigated to optimize the experimental conditions for the determination of sdn. the oxidation process was shown to be diffusi...

We introduce here a dynamic optode for buffer capacity sensing based on photochromic spiropyran (Sp). It represents the first reversible optical sensor for buffer capacity. Sensing was possible using a non-equilibrium readout mode, a novelty for photoswitchable optical ion sensors. In addition to the buffer capacity, the final point of each measurement sequence provides the pH of the solution.

Introduction: Viscoelastic behavior is intrinsic to human ligament and may guard against structural failure. Glycosaminoglycans (GAGs) have been implicated as macromolecules that likely impact ligament viscoelasticity [1-2]. GAGs selfassociate [3] and may mechanically connect adjacent collagen fibrils and thus influence fibril sliding during tension. Although studies have shown GAGs to influenc...

We propose an efficient solution to optimize buffer dumping allowing to reduce significantly the losses caused by buffer overflow. To highlight the proposed architecture we have analyzed its performance compared with different configurations of polling scheme.