Abstract: Closely related formulations of GRAS food additives serve as insect repellents, insecticides and larvicides. The ingredients of the repellent, insecticide and larvicide also exhibit useful disinfectant properties against vector-borne pathogenic micro-organisms.

Abstract: Closely related formulations of GRAS food additives serve as insect repellents, insecticides and larvicides. The ingredients of the repellent, insecticide and larvicide also exhibit useful disinfectant properties against vector-borne pathogenic microorganisms.

Abstract: A photo-voltaic power cell based on a photoelectric semiconductor compound and the method of using and making the same. The semiconductor compound in the photo-voltaic power cell of the present invention can be electrolytically formed at a cathode in an electrolytic solution by causing discharge or decomposition of ions or molecules of a non-metallic component with deposition of the non-metallic component on the cathode and simultaneously providing ions of a metal component which discharge and combine with the non-metallic component at the cathode thereby forming the semiconductor compound film material thereon. By stoichiometrically adjusting the amounts of the components, or otherwise by introducing dopants into the desired amounts, an N-type layer can be formed and thereafter a P-type layer can be formed with a junction therebetween. The invention is effective in producing homojunction semiconductor materials and heterojunction semiconductor materials.

Abstract: A photo-voltaic power cell based on a photoelectric semiconductor compound and the method of using and making the same. The semiconductor compound in the photo-voltaic power cell of the present invention can be electrolytically formed at a cathode in an electrolytic solution by causing discharge or decomposition of ions or molecules of a non-metallic component with deposition of the non-metallic component on the cathode and simultaneously providing ions of a metal component which discharge and combine with the non-metallic component at the cathode thereby forming the semiconductor compound film material thereon. By stoichiometrically adjusting the amounts of the components, or otherwise by introducing dopants into the desired amounts, an N-type layer can be formed and thereafter a P-type layer can be formed with a junction therebetween. The invention is effective in producing homojunction semiconductor materials and heterojunction semiconductor materials.

Abstract: A method of fabricating a thin film heterojunction photovoltaic cell which comprises depositing a film of a near intrinsic or n-type semiconductor compound formed of at least one of the metal elements of Class II B of the Periodic Table of Elements and at least tellurium and then heating said film at a temperature between about 250.degree. C. and 500.degree. C. for a time sufficient to convert said film to a suitably low resistivity p-type semiconductor compound. Such film may be deposited initially on the surface of an n-type semiconductor substrate. Alternatively, there may be deposited on the converted film a layer of n-type semiconductor compound different from the film semiconductor compound. The resulting photovoltaic cell exhibits a substantially increased power output over similar cells not subjected to the method of the present invention.

Abstract: A dual polarized antenna couplet, comprised of a vertical quarter-wavelength radiator driven at its lower end and centered on a half-wavelength horizontal dipole radiator drooping its ends about 45.degree. from the center where it is driven in phase with the vertical radiator, produces a polarized wavefront at an angle between the vertical and the horizontal, such as 45.degree. when both are driven equally, with 1.5 db bi-directional gain in the horizontal pattern and in the vertical pattern as well. A similar parasitic couplet is used as a reflector behind the driven couplet, and two or more parasitic couplets are used as directors in front of the driven couplet. The elements of the antenna are coated with dielectric material to achieve a shortening effect of about 11% over the normal lengths of the antenna elements otherwise required.

Abstract: Schottky and p-n type photo-electrochemical cells are disclosed. These cells are suitable for sunlight and use gelled electrolytes based either on aqueous or solvent substances. The gel is a light-transparent, inert substance. These cells have at least one electrode of a semiconductor. The second electrode may be a metal or a semiconductor of the opposite conductivity type. These gelled electrolyte cells display performance advantages over their corresponding liquid electrolyte cell structures. Higher photovoltages and photocurrents are obtained along with a reduction in the rate of undesired photo-decomposition of one of the electrodes. Furthermore, gelled electrolytes may be contained between two closely spaced electrodes. This type of cell reduces both ohmic losses and light attenuation.

Abstract: A square-loop directive antenna of half wavelength circumference is provided with improved front-to-back ratio and gain by placing capacitive reactances for 90.degree. phase shift in the sides, instead of inductive reactances as in the past, and with further improved front-to-back ratio and gain by placing divided reactances (inductive or capacitive) in the sides with just enough reactance to provide a phase shift of 22.5.degree. next to the driven side of the loop and the balance (90.degree.-22.5.degree.) next to the parasitic side of the loop.

Abstract: A sewerless recirculating toilet and human waste storage system wherein human waste products and a flushing fluid of a specific gravity less than water are received from a commode, the waste products are separated from the flushing fluid, the separated waste products are stored indefinitely without additional treatment in a state of suspended animation for possible subsequent by-products recovery therefrom and the separated flushing fluid is stored on top of the separated waste products until a portion thereof is recycled back into the commode in a purified state for flushing the commode.

Abstract: A non-polluting wastewater evaporation disposal method and system wherein hydrogen gas is electrolytically produced from the wastewater, collected and used as a source of fuel to evaporate the wastewater to thereby convert the wastewater to a disinfected non-polluting sterile solid residue and water vapor. A halogen having an atomic number of between 16 and 54 may also be electrolytically produced from the wastewater and used to disinfect the wastewater.