Abstract: A process is disclosed for the recovery of a compound, for example, a peptide-containing compound, from a solution containing contaminants through combined affinity-chromatographic purification and ultrafiltration. The process comprises contacting the solution containing the compound and impurities with a first complex of ligand bound to a carrier so as to form a second complex of the compound, the ligand and the carrier, wherein the carrier is comprised of a macromolecular solid material; subsequently splitting off of the compound from the second complex to reform the compound and first complex; and separating of the compound from the first complex. An arrangement for the recovery of a compound from such a solution containing impurities is also disclosed.

Abstract: Microorganisms and unicellular organisms in a sample are identified or determined by exposing the sample to an adsorbent having a specific binding power for the entity to be determined to bind the entity to the adsorbent, separating unbound sample, exposing the adsorbent containing the entity to a nutrient medium to initiate metabolism with resulting change in the physical or chemical characteristics of the substrate and observing these changes.

Abstract: The invention is concerned with purification of a biologically active substance with the aid of a system of at least two immiscible aqueous phases; the process of the invention involves binding said substance to particles which have an affinity for said substance and distribute predominantly quantitative into one of said phases, and subsequently liberating said substance from said particles after separating the particle-containing phase from the other phase or the other phases.

Abstract: An improvement in carrying out assaying methods involving biospecific affinity reactions in which there are used from two to four reactants, one of which reactants, reactant (I), being labelled with at least one analytically indicatable atom or group and being soluble in the aqueous liquid wherein the biospecific affinity reaction is carried out, said reactants forming by biospecific affinity reactions a conjugate in which labelled reactant (I) is incorporated, and in which methods the analytically indicatable atom or group is assayed in the conjugate and/or in the free labelled reactant (I), said improvement being characterized in(a) using as at least one of said reactants a reactant which is modified in such a way that conjugate and free labelled reactant (I) are asymmetrically partitioned in a system of two immiscible aqueous liquid phases, which system in addition to water comprises in dissolved form(i) at least two polymers or(ii) at least one polymer and at least one salt or(iii) at least one polymer an