Abstract: A photobioreactor system includes a growing tower tray assembly configured to utilize laminar flow to harvest a plant; a nursery subsystem configured to feed inoculum to the growing tower tray assembly; and a nutrient feeding subsystem configured to feed nutrient media to the growing tower tray assembly.

Abstract: A method for testing the visual capacity of a test subject, the method including the steps of positioning the test subject relative to a visual display; exhibiting to the test subject at least one visual target in the visual display; and monitoring the reaction of the test subject in response to the visual target.

Abstract: A rotary turret injection moulding machine has a turntable (12) carrying a plurality of mould sets (17) and arranged to be rotated continuously, a device for injecting moulding material into the moulds and a clamping mechanism for holding the moulds closed during the injection being reciprocated in synchronsym with the rotation of the turntable. Each mould set has one part (18) firmly mounted on the turntable and another part (19) which pivots for opening and closing the mould. A cam (40) follower coupled to the movable part cooperates with a stationary cam (41) extending around the turntable axis to close and open the mould as the turntable is rotated. The movable mould part includes a mould plate mounted for tilting movement on its support arm, and dowel pins (30) and sockets (31) on the mould plates are arranged to ensure correct alignment when they are closed together.