Abstract: We describe a method for purifying chymosin comprising providing an aqueous liquid sample containing chymosin and a separation medium comprising a base matrix and a plurality of firmly attached ligands that are capable of binding to chymosin, contacting the matrix with the sample under conditions permitting binding of chymosin to the matrix, and desorbing chymosin from the matrix. The characterizing feature is that the matrix is hydrophilic and that the ligands in the plurality of ligands are hydrocarbon groups in which all carbon atoms are sp3-hybridised, possibly with an ether oxygen or a thioether sulphur inserted between two carbon atoms at one or more positions in at least one of the hydrocarbon groups, and possibly a hydroxy group replacing a hydrogen atom at one or more positions in at least one of the hydrocarbon groups.

Abstract: A method for purifying chymosin comprising the steps of: providing an aqueous liquid sample containing chymosin and a separation medium comprising a base matrix and a plurality of firmly attached ligands that are capable of binding to chymosin; contacting the matrix with the sample under conditions permitting binding of chymosin to the matrix; and desorbing chymosin from the matrix. The characterizing feature is that the matrix is hydrophilic and that the ligands in the plurality of ligands are hydrocarbon groups in which all carbon atoms are sp3-hybridised, possibly with an ether oxygen or a thioether sulphur inserted between two carbon atoms at one or more positions in at least one of the hydrocarbon groups, and possibly a hydroxy group replacing a hydrogen atom at one or more positions in at least one of the hydrocarbon groups.

Abstract: Branched aminoalkanephosphonic acids, i.e. compounds containing at least one alkyl substituent in the .alpha.position to the phosphonic acid group are used for controlling phytopathogenic fungi by applying an effective amount of the compound to seed or foliage.

Abstract: Branched aminoalkanephosphonic acids, i.e. compounds containing at least one alkyl substituent in the .alpha.-position to the phosphonic acid group are used for controlling phytopathogenic fungi by applying an effective amount of the compound to seed or foliage.

Abstract: Novel guanidated aminophosphonic acid compounds their use as biocides and their intermediates. The compounds are guanidated N-(aminoalkyl) aminoalkanephosphonic acid derivatives and are characterized in that they comprise both a phosphonic acid type group and at least one guanidino group and also in that they are based on alkylene amines. The compounds have the general formula: ##STR1## wherein Z and Z' are hydrogen, a lower alkyl group or an alkali metal, Y is hydrogen or an amidine group, m is 1-3, n is 4-16 and p is 1-3. The compounds can be prepared by reacting a halogenoalkanephosphonic acid compound with an alkylene di- or polyamine followed by guanidation of the so obtained product. The compounds are particularly useful as fungicides and especially as fungicides for industrial purposes.