Abstract: The present disclosure relates to the technical field of medicine, in particular to use of a prostaglandin E2 (PGE2)-primed mesenchymal stem cell (MSC) product in preparation of a drug for treating lung injury (LI). A preparation method of the PGE2-primed MSC product includes conducting mixed culture on PGE2 and MSCs to obtain the PGE2-primed MSC product. The PGE2 and the MSCs are subjected to the mixed culture to enhance functions of the MSCs, promote migration of the MSCs to injury sites, strengthen anti-inflammatory effects of the MSCs, facilitate MSC proliferation, effectively relieve various lung injuries, and accelerate regeneration of injured alveolar epithelial cells. The drug prepared from the PGE2-primed MSC product provided by the present disclosure can effectively relieve LI and accelerate the regeneration of injured alveolar epithelial cells, and a remarkable treatment effect is obtained.

Abstract: This invention provides a composite material for bipolar plates for fuel cells including cemented by a MPC binder and electrically conductive fillers, and a method of manufacturing the same. The resulting bipolar plate achieves low gas permeability, high electrical conductivity, high flexural strength and good corrosion resistance. The flexural strength and corrosion resistance can further be enhanced by the incorporation of macro-reinforcement and a polymer based surface treatment, respectively.

Abstract: This invention provides a composite material for bipolar plates for fuel cells including cemented by a MPC binder and electrically conductive fillers, and a method of manufacturing the same. The resulting bipolar plate achieves low gas permeability, high electrical conductivity, high flexural strength and good corrosion resistance. The flexural strength and corrosion resistance can further be enhanced by the incorporation of macro-reinforcement and a polymer based surface treatment, respectively.

Abstract: This invention provides a composite material for bipolar plates for fuel cells including cemented by a MPC binder and electrically conductive fillers, and a method of manufacturing the same. The resulting bipolar plate achieves low gas permeability, high electrical conductivity, high flexural strength and good corrosion resistance. The flexural strength and corrosion resistance can further be enhanced by the incorporation of macro-reinforcement and a polymer based surface treatment, respectively.

Abstract: This invention provides a composite material for bipolar plates for fuel cells including cemented by a MPC binder and electrically conductive fillers, and a method of manufacturing the same. The resulting bipolar plate achieves low gas permeability, high electrical conductivity, high flexural strength and good corrosion resistance. The flexural strength and corrosion resistance can further be enhanced by the incorporation of macro-reinforcement and a polymer based surface treatment, respectively.

Abstract: Measurement of the impedance and complex resistivity of a sample is used for measuring parameters resulting from a change in physical or chemical state. A variable frequency signal is provided by a transformer primary coil. A secondary coil of the transformer with a closed loop and electrically coupled said sample is monitored along with a leakage current sensor. Sampling at multiple signal frequencies is performed at the multiple signal frequencies.

Abstract: This invention provides a composition for thermal insulation, comprising magnesium oxychloride cement (MOC) and air-filled glass or ceramic beads, and a method of preparing said composition. The composition may further comprise one or more additives selected from the group consisting of titanium dioxide, fly ash, pigment, potassium dihydrogen phosphate (KH2PO4) and sodium dihydrogen phosphate (NaH2PO4).

Abstract: A novel method for the preparation of an aqueous polyacrylate modified polyurethane dispersion is disclosed. The preparation method includes three main steps: a) preparation of polyacrylate polymer or copolymer emulsion; b) preparation of polyurethane prepolymer with carboxylic groups and neutralization treatment to the carboxylic groups; and c) dispersion and chain-extension of polyurethane prepolymer by adding the polyacrylate emulsion into the polyurethane prepolymer under vigorous agitation, or other mechanical operation. The aqueous polyacrylate modified polyurethane dispersion has self-crosslinkability when an unsaturated acetoacetoxy compound is used for the preparation of the polyacrylate emulsion.

Abstract: This invention provides a composition for thermal insulation, comprising magnesium oxychloride cement (MOC) and air-filled glass or ceramic beads, and a method of preparing said composition. The composition may further comprise one or more additives selected from the group consisting of titanium dioxide, fly ash, pigment, potassium dihydrogen phosphate (KH2PO4) and sodium dihydrogen phosphate (NaH2PO4).

Abstract: Measurement of the impedance and complex resistivity of a sample is used for measuring parameters resulting from a change in physical or chemical state. A variable frequency signal is provided by a transformer primary coil. A secondary coil of the transformer with a closed loop and electrically coupled said sample is monitored along with a leakage current sensor. Sampling at multiple signal frequencies is performed at the multiple signal frequencies.

Abstract: A novel method for the preparation of an aqueous polyacrylate modified polyurethane dispersion is disclosed. The preparation method includes three main steps: a) preparation of polyacrylate polymer or copolymer emulsion; b) preparation of polyurethane prepolymer with carboxylic groups and neutralization treatment to the carboxylic groups; and c) dispersion and chain-extension of polyurethane prepolymer by adding the polyacrylate emulsion into the polyurethane prepolymer under vigorous agitation, or other mechanical operation. The aqueous polyacrylate modified polyurethane dispersion has self-crosslinkability when an unsaturated acetoacetoxy compound is used for the preparation of the polyacrylate emulsion.

Abstract: Acoustic attenuation materials are described that comprise outer layers of a stiff material sandwiching a relatively soft elastic material therebetween, with means such as spheres, discs or wire mesh being provided within the elastic material for generating local mechanical resonances that function to absorb sound energy at tunable wavelengths.

Abstract: Acoustic attenuation materials are described that comprise outer layers of a stiff material sandwiching a relatively soft elastic material therebetween, with means such as spheres, discs or wire mesh being provided within the elastic material for generating local mechanical resonances that function to absorb sound energy at tunable wavelengths.

Abstract: The present invention provides an apparatus and method for measuring the resistivity of a sample of cement-based material. A transformer is formed with a primary coil, a secondary formed by means of a sample of said cement-based material, means for supplying a voltage to said primary, means for measuring the voltage induced in said sample, and means for measuring the current induced in said sample. The resistance of the sample can be measured and thus the resistivity of the concrete sample can be calculated.

Abstract: Acoustic attenuation materials are described that comprise outer layers of a stiff material sandwiching a relatively soft elastic material therebetween, with means such as spheres, discs or wire mesh being provided within the elastic material for generating local mechanical resonances that function to absorb sound energy at tunable wavelengths.

Abstract: The present invention provides an apparatus and method for measuring the resistivity of a sample of cement-based material. A transformer is formed with a primary coil, a secondary formed by means of a sample of said cement-based material, means for supplying a voltage to said primary, means for measuring the voltage induced in said sample, and means for measuring the current induced in said sample. The resistance of the sample can be measured and thus the resistivity of the concrete sample can be calculated.

Abstract: An admixture for enhancing the durability of concrete to repeated freeze-thaw cycles is disclosed. The admixture comprises as an essential element a natural polymer material derived from millet. The admixture further comprises smaller quantities of naphthenic sulfate salt, triethanolamine and formaldehyde. In addition the admixture can improve concrete's impermeability and chloride ion binding capability.