Abstract: The invention concerns the use of triazene or/and pentazadiene polymers as photoresists and in particular as positive photoresists in order to cover biochemical reagents. In addition the invention concerns a new process for the production of triazene or/and pentazadiene polymers.

Abstract: A method for detecting an analyte is disclosed in which the analyte is brought into contact with at least one receptor which is bound to or can be bound to a solid phase. In order to avoid unspecific interferences the addition of a glycosidic surfactant is proposed.

Abstract: Novel compounds having the general formulaS--Ar--Xin whichS denotes a saccharide residueAr denotes an aryl residue andX denotes a straight-chained or branched alkyl residue with 2 to 20 carbon atoms,provided that the aryl residue may not be a 4-ethylphenyl, 4-isopropylphenyl, 4-sec.-butyl or 4-dodecylphenyl residue if the saccharide is a galactopyranoside residue, are interesting surface-active agents and are particularly suitable in diagnostic tests in order to clear serum.

Abstract: The invention concerns a method for the determination of a partner in an immunological reaction based on an immunoassay in which one of the reaction partners is present in a solid phase, wherein a polyethylene oxidepolypropylene oxide block copolymer having the formula I ##STR1## is used as the surface-active agent in which a can have a value between 40 and 150 and b a value between 10 and 50, which is characterized in that a hydrophilic block copolymer composition having the formula I is used which in a 1 % aqueous solution (weight/volume) has a surface tension of at least 45 mN/m and in which the average molar ratio of ethylene oxide groups to propylene oxide groups (2a/b) in the composition is at least 5.8. In addition the invention comprises a reagent for carrying out the above method.