Abstract: A filter assembly for removing particles from air flow across the filter assembly with a frame around a perimeter of the filter assembly, dynamic filter media for removing particles from air flowing from an upstream side of the filter assembly to a downstream side of the filter assembly that passes from a clean filter media storage chamber to a used filter media collection chamber within the frame on a second side of the filter assembly. The dynamic filter media is moved from the output from a turbine shaft modified by a gearbox to drive a set of drive traction rollers.

Abstract: A control is provided for evaluating a particular message to be sent from a mobile vehicle to a base station, or received by the vehicle from the base station. The control evaluates the particular message and the available communication systems to transmit the message. Weighting factors, and preferably a table, are included into the control which evaluates the particular message, and the current bandwidth for an optimum one of the communication systems. If the message can be sent on the optimum communication system, given the present usage, then that optimum system is utilized. If not, then the weighting factors/table looks at the second selected optimum system to determine whether the message would be best sent on that system. This process can continue through three or even more options. The operator of the mobile communication system is able to insert weighting factors that would control how and when the decision to move from the most optimum to the second most optimum is made.

Abstract: A process is provided for isolating and purifying a cholesterol-rich fraction from mammalian blood plasma or serum. The resulting cholesterol-rich fraction is useful as a growth medium ingredient.

Abstract: A method for isolating superoxide dismutase. The method involves contacting red blood cells containing proteinaceous impurities with a water-miscible organic solvent at a pH in the range of 5 to 8 and a temperature of from 15.degree. to 50.degree. C., removing the impurities and obtaining purified superoxide dismutase.

Abstract: A method of protecting porous ceramic building materials exposed to weathering which comprises coating the exposed surfaces of such porous ceramics with a composition comprising an aqueous silica sol having suspended therethroughout a finely divided granular ceramic powder.

Abstract: A method for the purification of lipoprotein cholesterol. The method involves the steps of adsorbing lipoprotein material on a silica adsorbant, eluting the adsorbed lipoprotein with water at a pH of about 10 to 11.5, adjusting the salt concentration to about less than 0.05M, heating the lipoprotein to about 50.degree. to 100.degree. C. for a period of about 5 minutes to 24 hours, adding an alkaline carbonate and alkaline earth salt to form a precipitate and removing the precipitate, adjusting the pH from about 6.5 to 9.0 and recovering purified lipoprotein cholesterol. Also a method for using the cholesterol as a cholesterol reference material.