Abstract: An elastomeric composite containing an oxide filler, the elastomeric composite will find application in the preparation of substrates and insulating layers for flexible antennas. The composition of the elastomeric composite is based on natural rubber and contains an oxide filler which is calcium silicate phosphate CaO—SiO2—P2O5 in the amount of 25 to 75 parts by mass per 100 parts by mass of rubber, and the other ingredients are zinc oxide, stearic acid, tertiary butyl-benzothiazolyl sulphenamide and sulphur in the following amounts—zinc oxide from 3 to 5, stearic acid from 1 to 3, tertiary butyl-benzothiazolyl sulphenamide from 0.6 to 1 and sulphur from 2 to 3, whereas the amount of the components in the oxide filler CaO—SiO2—P2O5 are the following (in wt. %): CaO—63.70, P2O5—5.97, SiO2—30.

Abstract: A composition of styrene butadiene rubber containing spinel type metal oxides and will find application for insulating layers and supports in flexible antennas that can be worn close to the human body without adversely affecting it. The composition contains spinel-type metal oxides, in which the ingredients per 100 mass parts of styrene butadiene rubber/SBR/are: zinc oxide from 1 to 5 mass parts, stearic acid from 1 to 2 mass parts, filler from 25 to 75 mass parts, vulcanization accelerator/TBBS/—from 1 to 1.5 mass parts, sulfur from 1.5 to 2.0 and the filler is spinel type metal oxides and is Zn0.53Co0.48Mn0.01Cr2O4. The spinel type of metal oxides has the following chemical composition in weight percentages: Cr—62, 10; Mn—0, 19; Co—16, 92; Zn—20, 79, and particle sizes range from submicron 0.2-0.5 ?m to 2-3 ?m.

Abstract: The present invention generally relates to a system for preparing reduced graphene-cobalt chromate composite for humidity sensor applications comprises a first glass beaker for pouring 3-7 grams of sucrose; a preheated muffle furnace for heating the first glass beaker containing sucrose for 5-15 minutes at 450-500° C. in an oxygen environment and obtaining the black foam of rGO after hydrating the sugar; a second glass beaker for mixing 3-7 grams rGO, 3-7 grams carbamide, 3-7 grams cobaltous, and 3-7 grams chromium nitrate and dissolving with double-distilled water; and a magnetic stirrer for stirring the mixed solution for 450 minutes to generate a homogenous solution and burning the uniform mixture at 425° C. in the preheated muffle furnace for 20 minutes to obtain graphene-cobalt chromate composite.

Abstract: A flexible wearable antenna intended for wireless communications applicable to medical telemetry.

Abstract: A choanal atresia apparatus for use in prevention of stenosis following choanal atresia repair in patients. Two tubular choanal tubes each have an interior surface and an exterior surface, an anterior end and a posterior end, and a central axis. A plurality of axially spaced apertures in each of the two choanal tubes are for discharging nasal secretion. A strip has opposed ends coupled to the posterior ends of the two choanal tubes respectively. The strip couples the two choanal tubes in a laterally spaced relationship. The choanal tubes and the strip are fabricated of a medical grade plastic.

Abstract: The disclosure relates to a composition of biocomposite based on natural rubber containing sol-bioglass, which is used and intended for insulating layers and pads in flexible antennas which can be worn in close vicinity with regard to the human body without adversely affecting it. According to the invention, the composition of the biocomposite intended and designed for insulating layers and pads in flexible antennas based on natural rubber is filled with sol-gel derived bioglass amounting to a quantitative range starting from 8 to 50 parts by weight with regard to 100 parts by weight rubber and having following list of remaining ingredients: zinc oxide from 2.5 to 3.5, stearic acid from 1 to 2.5, bis (triethoxysilylpropyl) tetrasulfide from 4 to 6, tertiary butyl-benzothiazolyl sulfenamide from 1 to 2.5, sulfur from 1 to 3 and isopropyl-phenyl-?-phenylene diamine from 0.5 to 1.5.

Abstract: A conductive nanocomposite which contains a mixed polymer matrix which contains a rubber and a polyether, carbon nanoparticles, and transition metal nanoparticles. The conductive nanocomposite has a nonlinear relationship between resistivity and temperature characterized by an exponential increase reaching a peak resistivity followed by an exponential decrease as temperature increases. Also disclosed is a method of forming the conductive nanocomposite involving mixing the components, aging, and pressing. The conductive nanocomposite forms a component of a heater that is self-regulating as a result of the nonlinear relationship between resistivity and temperature of the conductive nanocomposite. The nanocomposite also forms a component of a thermistor.

Abstract: A conductive nanocomposite which contains a mixed polymer matrix which contains a rubber and a polyether, carbon nanoparticles, and transition metal nanoparticles. The conductive nanocomposite has a nonlinear relationship between resistivity and temperature characterized by an exponential increase reaching a peak resistivity followed by an exponential decrease as temperature increases. Also disclosed is a method of forming the conductive nanocomposite involving mixing the components, aging, and pressing. The conductive nanocomposite forms a component of a heater that is self-regulating as a result of the nonlinear relationship between resistivity and temperature of the conductive nanocomposite. The nanocomposite also forms a component of a thermistor.

Abstract: The disclosure relates to a composition of biocomposite based on natural rubber containing sol-bioglass, which is used and intended for insulating layers and pads in flexible antennas which can be worn in close vicinity with regard to the human body without adversely affecting it. According to the invention, the composition of the biocomposite intended and designed for insulating layers and pads in flexible antennas based on natural rubber is filled with sol-gel derived bioglass amounting to a quantitative range starting from 8 to 50 parts by weight with regard to 100 parts by weight rubber and having following list of remaining ingredients: zinc oxide from 2.5 to 3.5, stearic acid from 1 to 2.5, bis (triethoxysilylpropyl) tetrasulfide from 4 to 6, tertiary butyl-benzothiazolyl sulfenamide from 1 to 2.5, sulfur from 1 to 3 and isopropyl-phenyl-?-phenylene diamine from 0.5 to 1.5.