Perfluorocarbon compounds have been utilized either in pure (neat) form or as emulsions suspended in aqueous fluids. These man-made chemicals possess a unique physical property allowing them to dissolve much more respiratory gases than any water-based system. Understanding the basic physical chemistry surrounding these emerging medical technologies will assure they are utilized to maximum benef...

Filtration is a common method of sample preparation in dissolution testing, prior to HPLC injection. The purpose of sample filtration is to remove non-dissolved solids prior to HPLC injection. Non-dissolved solids interfere with the resulting chromatography by continuing to dissolve throughout the period of the analysis and also by plugging the HPLC column. It has already been shown that sample...

coagulate bovine plasma albumin, 'y-globulin and egg albumin to form opaque gels at room temperature and neutrality. The reaction with bovine plasma albumin is many times more rapid than with the other two proteins. Gels so formed rapidly dissolve in concentrated solutions of amides such as urea. The capacity of albumin to form this type of gel is decreased by partial acetylation of the albumin...

It is possible to eliminate some of the traditional problems with GIS implementation by changing the model of space used. The Voronoi spatial model has bee used as the basis of a set of core GIS or spatial operations, with encouraging results. It has been implemented in a PC environment so as to leave as much flexibility as possible for the designer of any particular application. Examples inclu...

A formal conceptualization of the original concept of system and related concepts—from the original systems approach movement—can facilitate the understanding of information systems (IS). This article develops a critique integrative of the main IS research paradigms and frameworks reported in the IS literature using a systems approach. The effort seeks to reduce or dissolve some current researc...

Using in situ viscosity measurement, the rate of cellulose dissolution in a number of ionic liquids has been determined allowing their performance as solvents to be quantitatively assessed. 1-Butyl-3-methylimidazolium ethanoate was shown to dissolve cellulose faster than analogous ionic liquids with chloride or dimethylphosphate anions. Analysis of the data highlights the influence of both anio...

Several diverse proteins are found to readily dissolve in neat low-transition-temperature mixtures (LTTMs). They undergo no irreversible denaturation in such unusual solvents, and the resistance of hen egg-white lysozyme against thermoinactivation in LTTMs is greater than in aqueous solution at extreme pHs. Separately, the water-sensitive drug aspirin is found to form concentrated transparent L...

Fibronectin, 0.1% solution Reagent Sigma-Aldrich F-1141 This pre-made solution can be used as 50x stock. Make 1/50 dilution with 1x MBS-H make 20ug/ ml working solution just before you use. You need 200ul per samples of this working solution.I do NOT recommend using solid Fibronectin, because it is difficult to dissolve at 0.1% concentration to make the stock solution. Although it is more expen...

Methyl-t-butylether (MTBE) is a synthetic ether that is mainly used as a fuel additive: it replaces lead in gasoline, increasing the anti-knock rating. Next to this it serves as an intermediate in the production of isobutylene and as a process solvent in the pharmaceutical industry. In clinical practice MTBE is used to dissolve gallstones. At room temperature MTBE is a colourless liquid with a ...

In this paper, we consider the mathematical formulation and analysis of an optimal control problem for a nonlinear Dissolve Oxygen(DO)/ Biological Oxygen Demand(BOD) system with logistic growth term. In the BOD/DO system studied by Bermúdez [2] this logistic growth term is not included. We study the existence and uniqueness of solution for the nonlinear system as well as the existence and uniqu...