Abstract: The present invention relates to a screening chip for cell sorting, said screening chip comprising a substrate having opposing first and second surfaces, wherein at least a portion of said first surface is coated with a Raman-inactive coating material which can be vaporised by laser irradiation at a wavelength and wherein said substrate is transparent to laser radiation at wavelength In further aspects of the invention, a cell sorting method employing the screening chip and a cell sorting apparatus employing the screening chip are provided.

Abstract: A fluid storage unit suitable for a tankless solar heater system. The storage unit has an elongated cylindrical hollow vessel having a sealing ring fit within an open end of the vessel abuting a ridge formed on the vessel and a cover attached to the open end of the vessel and abutting the ring to compress it against the ridge to form a fluid tight seal between the cover and the vessel.