A nozzle coupling includes a connector having an attached nozzle and opposing ends. The compounds and the compositions and methods that utilize them can be used, either alone or in conjunction with a neurotrophic factor, such as nerve growth factor, to promote repair of neuronal damage caused by disease or physical trauma. The crystal oscillator also has an adjustable capacitive assembly having selectable capacitances which is connected parallel to a combined capacitor comprising the first and the second oscillating capacitors. Alternatively, the blender may be admitted through the closure member 2 when blending is required.