An apparatus for the extraction of gases has a flexible duct with an interior therein, a polymeric support extending in the interior of the flexible duct, a first anchor that secures an end of the polymeric support, a second anchor that secures an end of the flexible duct, and a duct connector. Such operation-related data includes inbound source IP addresses, the requested host and zone, identification of the selected \u201cbest\u201d IP addresses resulting from application of a GSLB algorithm, and the selection metric used to decide on an IP address as the \u201cbest\u201d one. A barrier is provided between the detonator and the booster charge. The circuit design can be declustered to perform additional placer optimization tasks on the declustered circuit design. On the other hand, when the input signal is H level, a third NMOS transistor is turned on, the reference potential is output to the first output terminal, a fourth NMOS transistor and a second PMOS transistor are turned on, and thereby, the first power supply potential VDH is output to the second output terminal. In particular, the invention relates to the use of selected carbohydrate-lipid constructs in methods of inhibiting virus infection andor promoting clearance of virus from infected subjects.