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: The present invention relates to a method for synthesizing dysprosium-doped cobalt-chromate for supercapacitor applications and a composition for the same, wherein an efficient and cost-effective Solution Combustion synthesis method is utilized for the preparation of Dy-doped CoCr2O4 (CCD). The stoichiometric dissolution of metal and rare earth nitrates, along with fuels, in distilled water forms a green-colored solution, subsequently heated to 450 degrees Celsius. The resulting ash undergoes grinding to yield a fine green pigment with a controlled size of 25 nm. Electrochemical properties of CCD are thoroughly examined through cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. Capacitive behavior, evaluated via various techniques, demonstrates an increase in capacitance with Dy3+ concentration. Density of states calculations reveal improved electronic features after Dy3+ doping, emphasizing enhanced charge storage capabilities.

Abstract: The present invention relates to an electrochemical sensor for rapid and accurate detection of Na+ and K+ ions in the human body. The sensor utilizes a crown-ether functionalized graphene-based electrode, developed through innovative synthetic strategies. The process involves engineering graphene with highly selective crown ethers, resulting in a biocompatible, high-quality electrode. This sensor exhibits superior potentiometric detection capabilities for Na+ and K+ ions in extremely small samples. The invention offers a low-cost, highly sensitive, and selective method for monitoring ion concentrations, addressing the need for early identification of diseases caused by Na+/K+ imbalances. Benefits include rapid testing, versatility, and potential applications in personalized medicine and point-of-care diagnostics. This technology overcomes existing obstacles in early disease detection and provides a foundation for advanced biosensor development in healthcare.

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: A photomemcapacitor device comprising a metal oxide semiconductor material is provided. The photocapacitor device comprises a p-n junction and a Schottky junction. A photomemcapacitor is provided for responding to photons at specified wavelengths.

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: The subject matter of the present patent application constitutes an elastomer composition intended for embedding a compact antenna designed to be used and operated in close proximity with regard to the human body to build short-range wireless communication links. The elastomer composition for embedding a compact antenna is based on natural rubber and components whose quantities are expressed in parts in wt per 100 parts by weight of natural rubber (phr), namely: sulfur—1 to 2 phr; phenyl-trichloromethylsulfenyl-benzene sulfonamide—0.1 to 0.5 phr; diphenylguanidine—from 0.3 to 0.8 phr; tertiary butyl-benzothiazolyl-sulfenamide—from 1 to 2 phr; dimethylbutyl-phenyl-p-phenylenediamine—1.5 phr; polymerized trimethyl dihydroquinoline—1.5 phr; stearic acid—2.0 phr; zinc oxide—3.0 phr; rapeseed oil—15 to 30 phr; bis (triethoxysilylpropyl) tetrasulfide-silane—from 0.1 to 4.0 phr; 3-thiocyanato-propyl-triethoxy silane—from 2.0 to 6.0 phr; carbon black—5.0 phr; optionally silicon dioxide—from 10 to 50.