A chemical composition including asafetida, ajwain seed, videnga, cumin seeds, fenugreek, triphala, fennel seed, and turmeric and the method of use thereof as a treatment for relieving headache, blood constipation, tapeworm, hemorrhoid, constipation and stomach acidity symptoms. Engineered irrigants provide targeted delivery of desired agents, including agents for propulsion of nano-devices, agents including molecular probes, gene expression agents, magnetically orientable agents, agents for discrete tissue temperature detection and tissue regeneration agents. The virtual shopping mall operations apparatus E presents the virtual goods information to a buyer B and intermediates a trade between the seller A and the buyer B on the virtual shopping mall. The sensor control unit also includes two or more conductive contacts disposed on the housing and configured for coupling to two or more contact pads on the sensor. The device receives at least one first frequency spectrum indicative of the condition of the network at a first time during the operation of the network, and a second frequency spectrum indicative of the condition of the network at a second, later time.