A spraying device for dispensing liquids which foam by deformation of a container. The valve plate is preset under tension elastically in the installation position between outer edge holding devices, with the elastic pretensioning being at least large enough that deformations due to edge clamping can be compensated. The body of the apparatus has imparted therein gas permeable membranes in combination with tracheal spaces that will allow the free flow of gases between the cell culture chambers and the external environment. When the wobble is formed on the blank portion and the blank portion is formed so that a phase of the wobble is formed on the groove structure, a phase of the wobble on the blank portion is continued with a phase of the wobble of the groove structure within another unit adjacent to the blank portion. Likewise, data patterns used in the functional test sequences may be specified as a data pattern selection together with base address, extent and optional stride indications and introduced into a plurality of target memory locations using facilities of the on-chip loader. The integrated stacked microchannel heat exchanger and heat spreaders are configured to support either a two-phase or a single-phase heat transfer process using a working fluid such as water.