摘要:
The present invention provides novel spherical grains of polyamino acid which can be used as a filler in chromatography, cosmetic powder and the like. The spherical grains can be produced by a method which comprises the steps of preparing a solution of hydrophobic polyamino acids, such as poly n-leucine, dissolved in an organic solvent; adding the solution to an aqueous medium and agitating said medium so as to obtain a dispersion of the spherical grains of the polyamino acid dispersed in the aqueous medium while evaporating the organic solvent; and isolating the spherical grains of the polyamino acid from the dispersion.
摘要:
The present invention provides novel spherical grains of polyamino acid which can be used as a filler in chromatography, cosmetic powder and the like. The spherical grains can be produced by a method which comprises the steps of preparing a solution of hydrophobic polyamino acids, such as poly n-leucine, dissolved in an organic solvent; adding the solution to an aqueous medium and agitating said medium so as to obtain a dispersion of the spherical grains of the polyamino acid dispersed in the aqueous medium while evaporating the organic solvent; and isolating the spherical grains of the polyamino acid from the dispersion.
摘要:
A solution of cellulose triacetate in a mixed solvent comprising a chlorinated hydrocarbon with a boiling point lower than that of an aqueous medium and an aliphatic higher alcohol with 6 or more carbon atoms is suspended as droplets in the aqueous medium, and then the chlorinated hydrocarbon in the droplets is removed by ecapora- tion to obtain spherical particles of cellulose triacetate containing the aliphatic higher alcohol. The spherical particles thus obtained are saponified and remaining aliphatic higher alcohol is removed, thereby giving porous cellulose spherical particles.
摘要:
A separation material capable of realizing efficient separation and recovery of a blood coagulation factor, especially blood coagulation factor VIII or complex thereof with von Willebrand factor, from plasma or from samples containing blood coagulation factors. The separation material for separating and recovering a blood coagulation factor comprises a porous matrix having linked thereon one or more ligands each consisting of a radical exhibiting an affinity to the blood coagulation factor to be recovered, said matrix having a specific surface area of at least 1. 5 m² per milliliter of the separation material with respect to pores having diameters of at least 0.1 µ m and being derived from a porous particulate material having an exclusion limit molecular weight of at least 1.5 X 10⁶ as determined with polyethylene glycol. The separation material is prepared by the process steps of subjecting a porous particulate material having an exclusion limit molecular weight of at least 1.5 X 10⁶ to an activation by l,l' -carbonyldiimidazolating, tresylating, carbodiimidizing, thiopropylating, epoxidizing, bromocyanizing or formylating using corresponding activating agent and reacting the so activated porous particulate material with one or more substances which exihit after being linked as ligand on the porous particulate material an affinity to the blood coagulation factor to be recovered, so as to form a porous matrix having a specific surface area of at least 1.5 m² per milliliter of the porous particulate material with respect to pores having diameters of at least 0.1 µ m.
摘要:
A novel ion-exchanger, particularly for ion-exchange chromatography, is obtained by introducing radicals of one or more ion-exchangeable groups into cross-linked glucomannan beads, by chemical treatment.
摘要:
A novel ion-exchanger, particularly for ion-exchange chromatography, is obtained by introducing radicals of one or more ion-exchangeable groups into cross-linked glucomannan beads, by chemical treatment.