Abstract:
A device is provided for performing chemical transformation in a fluid, with a flow distributor having at least one fluid medium inlet, at least one fluid medium outlet, and at least one confinement wherein the chemical transformation is performed; and a means for rotating, rocking, wagging,or oscillating the device. At least one confinement may be equipped with a provision for providing heat, cooling, sound, light or other types of radiation, such provision being contacted to an external source through an actuator shaft. The flow distributor may be provided with sectors connected with the centrally located fluid medium inlet and a designated peripheral fluid medium outlet. The means for rotating, rocking, wagging, or oscillating the device may be an element producing magnetic fields or a shaft mechanically connected to an external actuating device.
Abstract:
The present invention provides monolithic supports produced from linear aliphatic polyamides. It also provides a method of producing said monolithic supports by dissolution/precipitation of linear aliphatic polyamides. Finally, the invention provides using said supports in chromatography as well as chromatography columns containing said supports.
Abstract:
The invention relates to a polymeric material comprising crosslinked spherical particles that are obtained by photoinitiated precipitation polymerization of crosslinking monomer and optionally a further monomer in the presence of an initiator and a solvent. It also relates to a method for producing the material and a chromatography column containing the material.
Abstract:
The invention relates to a polymeric material comprising crosslinked spherical particles that are obtained by photoinitiated precipitation polymerization of crosslinking monomer and optionally a further monomer in the presence of an initiator and a solvent. It also relates to a method for producing the material and a chromatography column containing the material.
Abstract:
The present invention provides porous monoliths with high flow permeability that can be produced by polymerising and divinylbenzene in the presence of an initiator, a carboxy-functionalized nitroxide stable free radical and polymeric porogens. The monoliths produced with these stable free radicals functionalized with carboxylic groups feature porosities very different from those produced by polymerizations in-volving other SFRs, characterized by very large surface areas in combination with relatively large through-pores. The invention also provides a method for producing the monoliths, a column containing the monoliths and an assay method using the column.
Abstract:
The invention concerns a method for manufacturing of an object having phosphorescent properties, comprising the steps of providing an object having a surface made from aluminium or from an aluminium-based alloy and forming a layer of porous aluminium (hydr)oxide at said surface. The invention is characterized in that the method comprises the step of contacting the layer of porous aluminium (hydr)oxide with one or several solutions containing metal dopant ions such as to allow the metal dopant ions to bind to the layer of porous aluminium (hydr)oxide, wherein at least one of said solutions contains ions of at least one element selected from a first group consisting of calcium (Ca), magnesium (Mg), strontium (Sr) and barium (Ba), and wherein at least one of said solutions contains ions of europium (Eu). The invention also concerns an object obtainable by the above method.
Abstract:
A device is provided for performing chemical transformation in a fluid, with a flow distributor (11) having at least one fluid medium inlet (11), at least one fluid medium outlet (15), and at least one confinement (13) wherein the chemical transformation is performed; and a means for rotating, rocking, wagging, or oscillating the device. At least one confinement may be equipped with a provision for providing heat, cooling, sound, light or other types of radiation, such provision being contacted to an external source through an actuator shaft (14). The flow distributor (11) may be provided with sectors connected with the centrally located fluid medium inlet (12) and a designated peripheral fluid medium outlet (15). The means for rotating, rocking, wagging, or oscillating the device may be an element producing magnetic fields or a shaft (14) mechanically connected to an external actuating device.
Abstract:
The present invention provides monolithic supports produced from linear aliphatic polyamides. It also provides a method of producing said monolithic supports by dissolution/precipitation of linear aliphatic polyamides. Finally, the invention provides using said supports in chromatography as well as chromatography columns containing said supports.
Abstract:
The invention relates to the use of poly(perfluoroalkylene)sulfonic acids for cataly-zing a reaction between carbonyl containing compounds and hydrazine or hydrazide reagents to form hydrazone derivatives. It also embraces a solid reagent for simultaneous enrichment and derivatization of compounds comprising one or more carbonyl groups to hydrazone derivatives, which solid reagent comprises poly(perfluoroalkylene)-sulfonic acids and a compound having hydrazine and/or hyd-razide functionalities. The poly(perfluoroalkylene)-sulfonic acids may be present on a carrier. A method for catalyzing derivatization of carbonyl containing compounds to hydrazone derivatives is also described.
Abstract:
In a process for producing volatile hydrides of hydride-forming substances in a liquid sample for spectroscopic analysis, a hydride-forming reducing agent is deposited on an anion exchanger (28). The liquid sample is passed over the anion exchanger (28) coated with the reducing agent, in a neutral or basic solution. The hydride-forming anions are deposited on the anion exchanger (28) without reaction between hydride-forming substances and reducing agent. An acid is then passed over the anion exchanger (29), causing the hydride-forming anions to react with the reducing agent to form volatile hydrides.