Abstract: There is provided a process for the production of pure, concentrated urokinase starting from a crude urokinase solution. The crude urokinase solution is contacted in a medium having a pH of .gtoreq.6 with a porous solid matrix having a high specific surface area on whose surface there is immobilized aprotinin. Subsequently the urokinase adsorbed in this manner is eluted in an elution agent having a pH.ltoreq.4.5. There are obtained highly concentrated and very pure solutions of urokinase. The urokinase is used in medicine as a pharmaceutical for the dissolving of fibrinous clots and coagulums.

Abstract: There is prepared an anti-foulant paint comprising a matrix of a synthetic resin containing (1) at least one metal toxicant, and (2) at least one of the following compounds:(I) a salt of a mono- or diaminoacridine of the formula I ##STR1## wherein R.sup.1 is hydrogen, amino, methyl, ethyl, methoxy, chloro, nitro, or phenyl,R.sup.2 is hydrogen, amino, methyl, methoxy, chloro, nitro, or dimethylamino,R.sup.3 is hydrogen, amino, methyl, dimethylamino, methoxy, ethoxy, carbomethoxy, chloro, nitro, phenyl, cyano, or carbamyl,R.sup.4 is hydrogen, amino, methyl, methoxy, chloro, or nitro,R.sup.5 is hydrogen, amino, methylamino, .beta.-hydroxyethylamino, or .omega.-aminoethyl,R.sup.6 is hydrogen, amino, or methyl,R.sup.7 is hydrogen, amino, methyl, methoxy, or chloro,R.sup.8 is hydrogen, amino, dimethylamino, nitro, or chloro,R.sup.9 is hydrogen, or methyl,R.sup.

Abstract: A process for conditioning flue gases in waste material incineration plants with heat utilization. Secondary air is introduced into the combustion chamber above the combustion grate. The flue gases are moistened prior to entering the gas cleaner by water sprayed therein. Apparatus for performing the process is also disclosed.