Basf Aktiengesellschaft

Hewlett-packard Company

Jurgen Alfred Lux

Hans-Ulrich Jager

Dieter Hannu Boeckh

Stefan Stein

James E Young

Christian Schade

Wolfgang Paulus

Hubert Meixner

Ulrich Steuerle

Beate Ehle

Dieter Bockh

Jurgen Huff

Richard Lawrence Baer

Matthias Kroner

Angelika Funhoff

Martin Aus Kahmen

Mark R Bateman

Lukas H{umlaut Over (a)}ussling

Hans-Ulrich J{umlaut Over (a)}ger

The use of an amine with an average pK,of from 1 to 14 as detergency booster, preferably in textile detergents, especially in color detergents, and detergent formulations containing these amines.

Washing power enhancer for detergents

Use of water-soluble copolymers comprising N-vinylimidazole units as color transfer inhibitors in detergents

Use of quaternized polymerizates containing units of vinyl imidazol as a

Use of at least trivalent alcohols and their alkoxylation products

Water-soluble or water-dispersible cross-linked nitrogenated compounds

Use of polycationic condensation products as an additive for detergents

An electrophoresis system having separate internal and external voltage gradients that are vectorially coupled to determine zeta potential along the interior surface of a capillary column. The voltage gradient along the exterior of the capillary column is established such that the electrical potential at an on-column detection area is substantially equal to the electrical potential of a detector used to sense electrophoretic migration past the detection area. Typically, the capillary column is grounded at the point of detection, with the exterior voltage gradient being positive-going in one direction from the point of detection and being negative-going in the opposite direction.

Electrical potential configuration for an electrophoresis system

A method of making a capillary tube for providing increased control of electroosmotic flow in electrophoretic separation. A resistive coating solution is formed so that a tube coating having a high electrical resistivity may be achieved. An electrically conductive material, such as carbon black, is homogeneously mixed with a polymer, such as polyimide, in a solvent. The content by weight of the electrically conductive material is less than 20 percent and is preferably within 7 percent to 8 percent, relative to the content by weight of the polymer. The resistive coating solution is applied to the exterior of the tube until a thickness is reached which achieves a desired resistance across the coated exterior surface. Typically, a multi-layered coating is formed. The coating solution may be applied while rotating the capillary tube or, alternatively, while the capillary tube is drawn past an applicator.

Method of making an electrophoretic capillary tube

An electrophoresis system for controlling electroosmotic flow by affecting a zeta potential, wherein a conductive bridge provides continuity of control. A conductive coating on an optically transparent capillary tube is made of an opaque material which is removed at a detection window for on-column detection of sample constituents past the window. The conductive coating may be allowed to float relative to ground, may be grounded, or may be connected to one or more high voltage power supplies so that a potential gradient is established along the length of the conductive coating. A bridge establishes a low resistance electrical connection across the detection window, thereby establishing a continuity of external control of electroosmotic flow. In a first embodiment, the bridge is a generally flat metallic member that is adhesively bonded to the capillary tube at opposite ends of the detection window. The metallic member includes an aperture along the optical path from the on-column detector to the window. In a second embodiment the bridge is a wire that is bonded to the conductive coating at opposite ends of the window. A third embodiment is to leave a portion of the conductive coating along the length of the window at a region outside of the optical path. Another embodiment is one in which the detection window is at ground potential and the on-column detector itself is used to provide a bridge.

Conductive bridge for external control of electroosmotic flow

Growing community of inventors

Niederkirchen, Germany

Jurgen Alfred Lux