Apparatus and methods for a passive range finding proximity detector include a sensor element configured to detect infrared radiation emitted by objects within a detection area. The present invention further provides a method for treating or preventing sepsis comprising administration of the compounds of the present invention. Furthermore, a transmitting applet communicates with a recipient applet. With a first working voltage applied between the moveable and the fixed driving stages, moving of the driving stages’ sensing direction towards gravity at a first critical angle will cause moveable driving stages to collapse and touch the fixed driving stage on the substrate and thus turn on the MEMS G-switch. A promoiety is appended to the 7-hydroxy oxygen of the substrate as a substitute for the 7-hydroxy hydrogen of the parent isoflavone, the promoiety and the 7-hydroxy oxygen establishing an alkylcarbonate ester.