Abstract: A ceiling fan for cleaning air in a room wherein each blade of the ceiling fan has a cavity open to the top and bottom surfaces of each fan blade and a filter unit in each of the cavities but within the confines of the fan blade such that, when the ceiling fan is operated, the airflow created by the ceiling fan will be forced through the filter unit from the bottom surface through to the top surface, wherein the filter units can collect airborne particles.

Abstract: Organic enzyme solutions comprise an ion pair complex of an enzyme and a surfactant, and an organic solvent in which the enzyme-surfactant ion pair is dissolved. The solution has catalytic activity at least an order of magnitude greater than a suspension of an equal amount of the enzyme and organic solvent without ion pair complexes. The enzyme is preferably a hydrolase with an acyl transferase activity and the surfactant is Aerosol OT (sodium bis(2-ethylhexyl) sulfosuccinate) at low concentrations.

Abstract: A swimming pool cover and roll-up device combination comprising a flexible shaft extending intermediate of the swimming pool cover from one edge to an opposite edge, with the flexible shaft being connected at least intermittently along its length to the swimming pool cover. A crank arm or other wind-up device is provided to be connected at least to one end of the flexible shaft for applying torque to the flexible shaft. The flexible shaft can transmit the torque through the length thereof to roll up the swimming pool cover on the flexible shaft. The flexible shaft and swimming pool cover are adapted to float on the surface of the water, and when it is necessary to store the rolled-up swimming pool cover, it is removed completely from the swimming pool and stored remote therefrom.

Abstract: An improved method for preparing opipramol (I) is disclosed, wherein iminostilbene (II) is reacted with 1-bromo-3-chloropropane in the presence of a weak base selected from a hydrogen phosphate salt and an acetate salt and in the presence of a phase transfer agent to produce N-(3-halopropyl)iminostilbene (III), which is mixture of N-(3-chloropropyl)iminostilbene and N-(3-bromopropyl)iminostilbene, and then N-(3-halopropyl)iminostilbene is reacted with N-(2-hydroxyethyl)piperazine to form opipramol, as shown in the following equations, where X is chlorine or bromine.