Abstract:
A process for the depletion or removal of endotoxins from preparations containing active ingredients designated for therapeutical use which are obtained from natural sources by genetic engineering and/or biotechnology by treatment with chromatographic material wherein said natural source are lysed, the fractions obtained are optionally centrifuged, filtrated or treated with affinity chromatographic methods; said fractions are preincubated with an aqueous salt solution and detergents, treated with anion exchange material and then washed with another salt solution, and the active ingredients are eluted from the anion exchanger, followed by further purification in a per se known manner.
Abstract:
A device and a process for isolating nucleic acids by lysing intact cells and removing nucleic acids emerging from the lysed cells by the following steps:a) the cells are immobilized in a porous matrix, with the size of matrix voids being in the range of the type of cell to be lysed;b) the cells are lysed;c) the nucleic acids are fixated on the matrix surface, and subsequentlyd) are eluted.
Abstract:
A process for the chromatographic separation of nucleic acid using a chromatographic carrier material is described in which the surface of the carrier material is specially modified.
Abstract:
The present invention pertains to a process for the chromatographic separation of nucleic acid mixtures into their double-stranded and single-stranded nucleic acid fractions by simultaneously absorbing said nucleic acids as a whole to a mineral support, followed by separation into double-stranded and single-stranded nucleic acids by fractional elution, or by selectively absorbing double-stranded or single-stranded nucleic acid of a liquid sample to a mineral support, as well as solutions and a kit for performing the process according to the invention.
Abstract:
Use of isopropanol in aqueous solutions for chromatographic isolation of nucleic acids for enhancing the transfection efficiency of the isolated nucleic acids in prokaryotic and eukaryotic cells.
Abstract:
A process is disclosed for reducing or removing endotoxins from compositions containing therapeutic active substances extracted from natural sources by genetic engineering and/or biotechnology. For that purpose, the compositions are treated with chromatographic materials. The natural sources are disintegrated, the thus obtained fractions are, if required, centrifuged, filtered or treated using affinity chromatography methods, the fractions are pre-incubated in an aqueous salt solution and detergents, are treated with anion exchange materials, then washed with another salt solution. The active substances are eluted from the anion exchanger then further purified in a manner known per se.
Abstract:
A method for the separation of long-chain nucleic acids from other substances in solutions containing nucleic acids and other materials, comprising fixing long-chain nucleic acids in a nucleic acid-containing solution onto a porous matrix, washing the porous matrix to separate the other substances from the long-chain nucleic acids, and removing the fixed long-chain nucleic acids from the porous matrix is disclosed. A device for carrying out the method of the claimed invention is also described.
Abstract:
A process for the depletion or removal of endotoxins from preparations containing active ingredients designated for therapeutical use which are obtained from natural sources by genetic engineering and/or biotechnology by treatment with chromatographic material wherein said natural sources are lysed, the fractions obtained are optionally centrifuged, filtrated or treated with affinity chromatographic methods; said fractions are preincubated with an aqueous salt solution and detergents, treated with anion exchange material and then washed with another salt solution, and the active ingredients are eluted from the anion exchanger, followed by further purification in a per se known manner.
Abstract:
The present invention pertains to a process for the chromatographic separation of nucleic acid mixtures into their double-stranded and single-stranded nucleic acid fractions by simultaneously absorbing said nucleic acids as a whole to a mineral support, followed by separation into double-stranded and single-stranded nucleic acids by fractional elution, or by selectively absorbing double-stranded or single-stranded nucleic acid of a liquid sample to a mineral support, as well as solutions and a kit for performing the process according to the invention.
Abstract:
Described is a method of isolating cell components, such as nucleic acids, from natural sources by filtering a sample of the digested natural sources such as cells or cell fragments. The method is characterized in that the sample is passed through a filter, the pore size of which decreases in the direction of flow of the sample through the filter.