A biological toilet in which excrement and possibly garbage on a grid are brought to accelerated fermentation by supplemental heat and ventilation. The heat is supplied from a closed pipe loop containing a liquid heat transferring medium, which is circulated by a thermosiphon pump inserted in the loop and heated by a gas burner or an electric heating element.

1. An aerosol bomb comprising an elongated cylindrical casing, a transverse all in said casing having a rupturable diaphragm and defining a pressure chamber in the front end of said casing, said pressure chamber containing a compressed normally gaseous medium, a set of rotating tail vanes and a nozzle in the opposite end of said casing, a flexible sealed aerosol container within said casing adjacent said nozzle, penetrating means, within said casing, associated with said nozzle and adapted to pe...

A method of testing a substance for carcinogenic activity which comprises contacting the substance with isolated cell membranes having masked rearrangase activity and after a predetermined interval of time testing the cell membranes for rearrangase activity. This method enables substances to be screened for possible carcinogenic activity. A test kit is also described.

A biologically pure culture of the microorganism Micrococcus pseudoflaccidifex, ATCC No. 31970, which is capable of producing death in insects by mechanisms associated with wilt disease.

The invention relates to a biological activator for septic tanks. The biological activator is characterized by the fact it is in the form of a non-corrosive, non-toxic, finely-divided product having a significant specific surface constituting a base for the optional anaerobic microbic flora, permitting an increase in the density of bacterial saturation in the septic tank for an equivalent quantity of nutriment.

There are described processes for the preparation of submicroscopic particles of physiologically acceptable polymer associated with a biologically active material, by polymerizing a monomer in the presence of the biologically active material or by adsorbing the biologically active material upon preformed submicroscopic polymer particles. Where the biologically active material is an antigen, the particles are useful as constituents of injectable vaccines having an adjuvant effect.

A novel antigenic preparation which comprises a plurality of microvesicles are unilamellar bodies comprising a single lipid bilayer upon the exterior surface of which is bound an antigenic protein derived from a virus and having a hydrophobic region.

A novel antigenic preparation which comprises a plurality of microvesicles which microvesicles are unilamellar bodies comprising a single lipid bilayer upon the exterior surface of which is bound an antigenic protein derived from a virus and having a hydrophobic region.

A process for denitrifying a highly nitrogenous wastewater in the presence of high concentrations of ammonia is described. The process is based on upflow packed bed and fluidized bed reactors containing denitrifiers on the packing material. A carbon source, e.g. molasses, is metered into the wastewater as a source of carbon and energy to the bacteria. Excess bacteria are removed by hydraulic shear.

A low-impedance biological electrode device for establishing electrical connection between the human body and electrical recording or stimulating apparatus without the use of conducting fluids, such as, gels, pastes and electrolytes, comprising, a substantially planar relatively thin electrode body, having as the electrically conducting connecting unit contacting the human body, a plurality of individual longitudinally extending strands, fibers, or filaments of conducting material embedded in a ...