摘要:
A microspherical packing for liquid chromatography, which comprises a porous silicon carbide having numerous through-pores, and a process for producing said microspherical packing.
摘要:
A microspherical packing for liquid chromatography, which comprises a porous silicon carbide having numerous through-pores, and a process for producing said microspherical packing.
摘要:
To provide a novel packing material for liquid chromatography capable of separating and purifying, or collecting and recovering, a biopolymer such as a protein or a peptide by adsorption and desorption by a pH change without being influenced by the isoelectric point of the protein or by the salt concentration in a solvent in which the biopolymer such as the protein is dissolved, and to provide a process for concentrating and recovering a desired biopolymer such as a protein or a peptide from a large amount of dilute cell culture solution by means of such a packing material. Separation and purification, or collection and recovery, of a biopolymer, is carried out by liquid chromatography by means of a packing material for liquid chromatography comprising a base matrix and a ligand immobilized to the base matrix, wherein the base matrix is a hydrophilic base matrix having alcoholic hydroxy groups on its surface, the ligand is at least one ligand selected from the group consisting of an α-amino acid represented by the following formula (1):
RCH(NH 2 )COOH (1)
wherein R is an aromatic group or a C 5-7 non-ionic aliphatic group, and an aminomethyl benzoic acid, and the ligand is immobilized to the base matrix by an amide bond or an urethane bond via the amino group contained in the compound represented by the formula (1).
摘要:
Cholesterol-lowering agents comprise an anion exchange resin comprising: 60 to 95 mole% of monomer units of the formula (in which X is a halogen atom); 0 to 25 mole% of monomer units of the formula: (in which R¹, R² and R³ are the same or are different and each is a hydrogen atom or a lower alkyl or benzyl group and X has the meaning defined above); 0 to 30 mole % of monomer units of the formula: (in which R⁴ is a hydrogen atom or a lower alkyl or hydroxymethyl group); and 1 to 6 mole % of monomer units of the formula:
摘要:
A packing material for reversed phase chromatography, which comprises silica gel with its entire surface substantially coated with repeating units of a polycarbosilane of the formula (I): wherein R₁ is an octyl group, an octadecyl group or a phenyl group, R₂ is a methyl group or a methylene group, and n is a positive integer.
摘要:
A packing material for liquid chromatography is disclosed, which comprises an optically active compound having the formula I: wherein Ar is a phenyl group, an α-naphthyl group or a β-naphthyl group, R₁ is an alkyl group having from 1 to 4 carbon atoms, a phenyl group or a 3,5-dinitrophenyl group, R₂ is an alkyl group having from 1 to 4 carbon atoms, * indicates an asymmetric carbon atom and n is an integer of 2 or 3, as a stationary phase. Furthermore, processes for the production of the compounds of formula I and of said packing material are disclosed.
摘要:
A process for production of a partially hydrophilized absorbent is described, which comprises using, as a starting material, porous particles made of an organic compound having properties such that they are shrunk in a solvent containing water as a major component and swollen in a solvent containing an organic solvent as a major component; newly introducing functional groups to react with any one compound selected from the group consisting of compounds containing hydroxyl, amino, carboxyl, halogen or epoxy group in a solvent containing an organic solvent as a major component; and then reacting with a compound containing alcoholic OH group in a solvent containing water as a major component to immobilize the compound containing alcoholic OH group on the outer surfaces of the particles.
摘要:
A process for production of a partially hydrophilized absorbent is described, which comprises using, as a starting material, porous particles made of an organic compound having properties such that they are shrunk in a solvent containing water as a major component and swollen in a solvent containing an organic solvent as a major component; newly introducing functional groups to react with any one compound selected from the group consisting of compounds containing hydroxyl, amino, carboxyl, halogen or epoxy group in a solvent containing an organic solvent as a major component; and then reacting with a compound containing alcoholic OH group in a solvent containing water as a major component to immobilize the compound containing alcoholic OH group on the outer surfaces of the particles.