Abstract: A description is given of a genertic engineering process for the preparation of mesophilic microorganisms which contain a hydantoinase active at elevated temperature, and of DNA sequences which code for this enzyme.

Abstract: There is disclosed a liquids container provided with duct means for conducting fluids into and out of the container, the container comprising head and base portions and side walls connecting the head and base portions, and the duct means being secured to and extending into the container from the head portion. The duct means comprises three concentric pipes, the outermost one of which opens into the container near its head portion and the other two of which open into the container near its base portion, with the innermost one of the latter two pipes opening out at a greater distance from the container head portion than the other one of the two pipes. The duct means also comprises valve means normally closing the conduits and operable to open the conduits. There is further disclosed drawoff, cleaning and filling heads which can be connected to the container duct means and can be used to open different combinations of the conduits to enable fluids to be supplied to and removed from the container.