Abstract:
A process for the preparation of organic material comprising an organic substrate and at least one dielectric layer consisting of one or more oxides of a metal selected from groups 3 to 15 of the periodic table, which comprises the steps of: (a) suspending the organic material in an aqueous solution of fluorine scavenger; (b) adding an aqueous solution of one or more fluorine containing metal complexes which are the precursors of the desired metal oxide coating; and (c) subjecting said suspension to microwave radiation to deposit the metal oxide onto said organic material, wherein steps (b) and (c) can optionally be repeated using different fluorine containing metal complexes to produce one or more metal oxide layers. The substrate can be optionally dissolved with solvent to yield free metal oxide or mixed metal oxides that have a plane-parallel structure.
Abstract:
Methods and devices are provided to actively apply finish to one or more yarns in motion at speeds greater than about 3000 m/min, to achieve a finish application of 0.2 wt. % or more, and with a coefficient of variation of finish concentration of 10% or less. The devices are compact, portable and readily installed at a variety of positions on a fiber processing line. The devices of the invention contain the finish so that contamination of the surrounding areas is prevented. The devices may be used to provide an overfinish to a moving yarn between heated godet rolls. The so-provided heating may be used to dry the yarn and to promote curing reactions in the finish and between the yarn and finish compounds. The invention also includes the finished yarn products so produced. A yarn with increased finish uniformity is provided with an overfinish actively applied and dried on the draw bench before the first winding operation. The yarn products of the invention may be used in textile and leisure fiber applications, and in industrial fiber applications, such as in tires.
Abstract:
The invention concerns a metal object for medical or surgical use, such as a prosthesis, for example an endovascular prosthesis (called stent) for percutaneous transluminal coronary angioplasty, comprising a metal substrate whereof the surface is coated partly at least with a polysaccharide compound. The invention is characterised in that the polysaccharide compound is covalently bound, via a plurality of grafting arms, comprising each at least a silane unit, bound on one side to the metal substrate by an nullOnull metal bond, and on the other side, directly or indirectly, by a covalent nullNHnull bond, with the polysaccharide compound.
Abstract:
The invention provides hydrogel compositions, components, and hydrogel-actuated or mediated devices, and methods for the incorporation of hydrogel microscale components in microscale devices and systems. The methods and devices result in active microvalves that are useful in microfluidic applications, including analyte sensing, in process chemical and fermentation stream monitoring, and drug delivery. In particular, the devices are useful for controlled drug delivery either in response to a pre-determined stimulus or for pulsatile delivery.
Abstract:
The present invention relates to a method for coating of a pharmaceutical product. The method comprises the step of producing discrete droplets (7) of controlled size, shape and composition with at least one micro dispenser (1) and distributing droplets (7) with controlled velocity, time of flight. Also, the method comprises the step of controlling the production frequency and modulation of the droplets (7). Further, the method comprises the step of controlling the flow rate, temperature and composition of the carrier gas and directing droplets (7) towards particles (10) subjected to coating. The present invention also relates to a device for coating of a pharmaceutical product. The device comprises a droplet producing unit (1) and a droplet-directing unit (8). The droplet producing unit (1) is a piezo-actuated micro dispenser (1) for producing discrete droplets (7) and controlling the size, shape and composition of said droplets (7).
Abstract:
According to one embodiment of the present invention, an optical-based test sensor for use in the determination of an analyte in a liquid sample is disclosed. The test sensor includes a base, a polymer carrier, and a test membrane. The base has a capillary channel formed in a surface of the base that is adapted to move a liquid sample from an inlet to a reaction area formed in the base. The polymer carrier has a lower surface adhered to the surface of the base and is disposed over at least a portion of the capillary channel. The test membrane, which contains a reagent, is adhered to the lower surface of the polymer carrier and extends from the polymer carrier into the reaction area.
Abstract:
A method of immobilizing a target molecule to a solid support surface capable of interacting with the target molecule is disclosed. The method comprises the steps of complexing the target molecule with a vesicular structure capable of forming a dissociable complex with the target molecule, contacting the complex formed with the solid support surface to thereby bind the target molecule to the surface, dissociating the complex, and removing the vesicular structure from the solid support surface to leave the target molecule immobilized on the surface. A method of sensitizing a solid support surface, the use of the sensitized solid support surface for analyzing analytes, and a reagent kit for carrying out the method are also disclosed.
Abstract:
The present invention relates to binding surfaces for the immobilization of ligands, ligand surfaces and structured surface arrays which present a plurality of identical or different ligands. The invention further relates to a process for the production and the use of such surfaces and to specific binder molecules which can be used for the preparation thereof.
Abstract:
An apparatus and method is provided for preparing and using a very large and diverse array of compounds on a substrate having rapidly accessible locations. The substrate contains cells in which the compounds of the array are located. Surrounding the cells is a non-wetable surface that prevents the solution in one cell from moving to adjacent cells. The compounds are delivered to the individual cells of the array by a micropipette attached to an X-Y translation stage.
Abstract:
A method for controlling galling including applying a composition of about 3.5 to about 36 wt %, based upon the total weight of the composition of a fluoridic or oxidic compound of a transition of alkaline earth metal; about 4 to about 96.5 wt %, based upon the total weight of the composition, of an adherent and about 0 to about 65 wt %, based upon the total weight of the composition, of a solvent contact area of a member. An antigalling coating composition having about 3.5 to about 36 wt %, based upon the total weight of the composition, of a fluoridic or oxidic compound of a transition or alkaline earth metal; about 4 to about 96.5 wt %, based upon the total weight of the composition, of an adherent and about 0 to about 65 wt %, based upon the total weight of the composition, of a solvent.