Abstract: A method for evaluation of a thin-layer chromatography plate after performing a separation process that separates components of a sample on the thin-layer chromatography plate comprises a digitization step, wherein at least two digital images are taken that differ with respect to the wavelength range of illumination of the thin-layer chromatography plate. The method further comprises a position identification step wherein the position of the thin-layer chromatography plate is identified for each of the at least two digital images. Furthermore, the method comprises an evaluation step wherein an image information of the at least two digital images is superimposed for at least all regions with at least one visible spot within at least one of the at least two digital images, so that the superimposition of image information from identical regions of at least two digital images can be used for evaluation of the thin-layer chromatography.

Abstract: A method for evaluation of a thin-layer chromatography plate after performing a separation process that separates components of a sample on the thin-layer chromatography plate comprises a digitization step, wherein at least two digital images are taken that differ with respect to the wavelength range of illumination of the thin-layer chromatography plate. The method further comprises a position identification step wherein the position of the thin-layer chromatography plate is identified for each of the at least two digital images. Furthermore, the method comprises an evaluation step wherein an image information of the at least two digital images is superimposed for at least all regions with at least one visible spot within at least one of the at least two digital images, so that the superimposition of image information from identical regions of at least two digital images can be used for evaluation of the thin-layer chromatography.

Abstract: A thin-layer chromatography development chamber (1) that can be used for developing thin-layer chromatography plates (21) by introducing a liquid solvent onto a sample arranged on the surface of a thin-layer chromatography plate (21), whereby the solvent and the thin-layer chromatography plate (21) can be inserted into the development chamber (1), comprises a housing (2) with an opening (3). The opening (3) of the development chamber (1) can be closed with a cover (4) that comprises a data input unit (10) for entering or collecting data related to a development process performed within the development chamber (1). The cover (4) further comprises a data communication unit (16) that enables a wireless data transmission of the data related to the development process to a thin-layer chromatography data storage device (24).

Abstract: A method and device for the optical scanning of a chromatographic sample (3), where a sample plate (2) holding the sample (3) is illuminated with light from a first illumination device (13) and the light emitted by the sample plate (2) is detected by an optical detector device (15) which detects in cell form or area form, a second illumination device (14) is preferably firstly activated in a preparation step. The sample plate (2) is displaced in a first displacement direction relative to the detector device (15), illuminated by the first illumination device (13) and a first measurement image is recorded. The sample plate (2) is displaced in a second displacement direction relative to the detector device (15), illuminated by the second illumination device (14), and a second measurement image is recorded.

Abstract: A method and device for the optical scanning of a chromatographic sample (3), where a sample plate (2) holding the sample (3) is illuminated with light from a first illumination device (13) and the light emitted by the sample plate (2) is detected by an optical detector device (15) which detects in cell form or area form, a second illumination device (14) is preferably firstly activated in a preparation step. The sample plate (2) is displaced in a first displacement direction relative to the detector device (15), illuminated by the first illumination device (13) and a first measurement image is recorded. The sample plate (2) is displaced in a second displacement direction relative to the detector device (15), illuminated by the second illumination device (14), and a second measurement image is recorded.

Abstract: The invention relates to the use of specific ascorbic acid derivatives for dyeing keratin-containing fibers or as direct dyes for the preparation of a composition for dyeing keratin-containing fibers, and to methods for dyeing keratin-containing fibers, in particular for dyeing human hair.

Abstract: The invention relates to the use of specific ascorbic acid derivatives for dyeing keratin-containing fibres or as direct dyes for the preparation of a composition for dyeing keratin-containing fibres, and to methods for dyeing keratin-containing fibres, in particular for dyeing human hair.

Abstract: The invention relates to the use of ?-amino acid derivatives for improving the solubility of sparingly soluble substances in water or aqueous solutions, and to mixtures and preferred compositions.

Abstract: The invention relates to the use of ?-amino acid derivatives for improving the solubility of poorly soluble substances in water or aqueous solutions and to mixtures and preferred preparations.