A selectively releasable side curtain is provided with at lease one zipper member having a first portion secured to the side pad and a second portion secured to the side curtain for selectively, releasably securing the side curtain relative to the side pad. If the requestor is authorized, the system redirects the service request to the service, and provides the service to the requestor. Such measurements may provide a background andor sensitivity measurement for use in processing sensor data and may be used to trigger events such as digital filtering of data or suspending display of data. In order to achieve an inward deflection of the spring element required for the transfer of the holding-down force, the spring element is prestressed to a prestressing force that is reduced with respect to the holding-down force, and the prestressed spring element is fixed on the valve. A method to prepare a composition for enhanced bioavailability of curcumin having purified curcuminoid and purified essential oil of turmeric.