Abstract: A multi-purpose heating device comprising: a first heating unit disposed at the bottom thereof; a second heating unit disposed at the top thereof; and a pillar which vertically connects one side end of the first heating unit with one side end of the second heating unit so as to form a space between the first and second heating units, the device being capable of cooking food through the first heating unit disposed at the bottom thereof and at the same time applying heat, through the second heating unit disposed at the top thereof, to the food being cooked by the first heating unit disposed at the bottom thereof, wherein the first and second heating units are controlled by individual power supply and power cut-off and the second heating unit can perform a heating function through up and down rotation on the basis of the pillar.

Abstract: Disclosed is a drainage canal structure, and in particular is a prefabrication type drainage canal structure which makes it possible to prevent a transformation and disengagement of a drainage canal in such a way that a plurality of drainage canal bodies each equipped with a waveform reinforcing unit are assembled in series, and a protection net is arranged over the drainage canal bodies which are buried underground, and a side reinforcing unit is installed into the ground so that a bottom foundation can be expanded, and the drainage canal bodies can be fixed in place on the ground. Trees, gravels, etc. can be prevented from penetrating into the drainage canal bodies thanks to the protection net. The drainage canal structure with an increased self-weight can be provided, which can keep it in place. Work and construction time can be saved because the drainage canal structure can be manufactured on the spot.

Abstract: We disclose novel classes of alloy nanocompositions that have superior decontaminant properties which are derived from their superior immediate and residual biocidal properties. By decontaminant properties it is understood that the preferred compositions are antiseptics, disinfectants, sanitizers, and/or sterilizers. By biocidal properties it is understood that the preferred compositions are excellent antimicrobials, antivirals, antifungals, and sporicidals. The preferred compositions have superior immediate and residual biocidal properties in free or bound form and they are safe to humans and environmental friendly. The nanocomposites described herein are in two element, three element or four element combinations. The preferred compositions have additional properties such as they are magnetic and/or they have distinct natural colors. The compositions are produced in different sizes ranging from 5 nm up to 500 nm, and for some other classes above 500 nm.