Abstract: Functionalized zeolites, including a zeolite substrate and a self-assembled monolayer of a phosphonic acid on a surface of the zeolite substrate, are disclosed, as are methods of making and using the functionalized zeolites. The disclosed methods and compositions have various applications, including in the use of molecular sieves to separate small-molecule gases from mixtures thereof. Gas adsorption selectivities and diffusion rates of the functionalized zeolites may be tuned or selected according to the disclosed methods.

Abstract: A leg support device for an invalid walker of the type having an upright frame structure with handle portions positioned so as to be gripped by the user when standing or walking and having a plurality of downwardly projecting legs, such leg support device being selectively mountable in a variety of vertically related positions to accommodate the physical requirements of the user and capable of achieving a variety of structural configurations so that the leg support device may be mounted to a variety of invalid walkers having different angular orientations between the legs and having different distances between the legs.