Abstract: A water-based viscosity reducer for emulsifying ultra-heavy oil and a preparation method thereof is provided, where the viscosity reducer includes the following components (based on 100 parts by weight): 0.7 to 4 parts of surfactant, 0 to 10 parts of oil phase, and the balance being a water phase; and the preparation method thereof is stirring the surfactant, the oil phase, and the water phase at room temperature for mixing evenly, to form the water-based viscosity reducer for emulsifying ultra-heavy oil. The invention greatly improves the overall surface activity by using the synergistic effect generated by the compounding of surfactants, and can significantly reduce oil-water interfacial tension. It is especially suitable for emulsifying viscosity reduction of alkali-sensitive stratum, has characteristics such as low cost, safety, and simple preparation, and can effectively enhance heavy oil recovery.

Abstract: The present invention provides the specific expression promoters in rice and the application. The present invention applies the promoter in the plant genetic engineering. The sequence of the promoter provided in the present invention is composed of the nucleotide sequence shown in SEQ ID No. 1; the nucleotide sequence shown in SEQ ID No. 2; Or the nucleotide sequence shown in SEQ ID No. 3.

Abstract: The present application discloses an organic electroluminescent device comprising carrier transport layers. The carrier transport layers include an electron transport layer and/or a hole transport layer, at least one of the carrier transport layers is doped with inert material having a refractive index less than 1.5. The present application also provides a manufacturing method of the above-mentioned organic electroluminescent device.

Abstract: A water-based viscosity reducer for emulsifying ultra-heavy oil and a preparation method thereof is provided, where the viscosity reducer includes the following components (based on 100 parts by weight): 0.7 to 4 parts of surfactant, 0 to 10 parts of oil phase, and the balance being a water phase; and the preparation method thereof is stirring the surfactant, the oil phase, and the water phase at room temperature for mixing evenly, to form the water-based viscosity reducer for emulsifying ultra-heavy oil. The invention greatly improves the overall surface activity by using the synergistic effect generated by the compounding of surfactants, and can significantly reduce oil-water interfacial tension. It is especially suitable for emulsifying viscosity reduction of alkali-sensitive stratum, has characteristics such as low cost, safety, and simple preparation, and can effectively enhance heavy oil recovery.

Abstract: The present invention discloses an emulsion-type water-based detergent for oily sludge, and a preparation method and use method thereof. The emulsion-type water-based detergent includes components in the following mass percentage contents: 2-10 parts of surfactant, 3-10 parts of oil-soluble component and the balance being aqueous phase, based on 100 parts by weight. The preparation method includes: stirring the surfactant, the oil-soluble component and the aqueous phase to mix uniformly to obtain a homogeneous and stable emulsion-type water-based detergent at room temperature. During use, the oily sludge is first mixed with the emulsion-type water-based detergent and stirred under a certain temperature; mixture is subjected to oil-water-solid three-phase separation after the washing is completed; and at last, solid phase is rinsed with hot water under the same temperature.

Abstract: The present invention provides the specific expression promoters in rice and the application. The present invention applies the promoter in the plant genetic engineering. The sequence of the promoter provided in the present invention is composed of the nucleotide sequence shown in SEQ ID No. 11; the nucleotide sequence shown in SEQ ID No. 2; Or the nucleotide sequence shown in SEQ ID No. 3.

Abstract: The present application discloses an organic electroluminescent device comprising carrier transport layers. The carrier transport layers include an electron transport layer and/or a hole transport layer, at least one of the carrier transport layers is doped with inert material having a refractive index less than 1.5. The present application also provides a manufacturing method of the above-mentioned organic electroluminescent device.

Abstract: The present invention provides a Chlorella variabilis-derived phosphomannose isomerase gene, herein named ChloPMI. The present invention also provides a prokaryotic expression vector comprising ChloPMI, which can be used for identifying mannose metabolic activity of ChloPMI protein. Further, the present invention provides an expression cassette and a plant expression vector comprising ChloPMI, and a use of the expression cassette and the expression vector in genetic transformation of plants. According to the present invention, the transformation of rice cells is successfully achieved with the plant expression vector constructed from the ChloPMI gene using mannose as a selection agent. According to the present invention, a plant-derived phosphomannose isomerase gene is successfully separated and cloned from Chlorella variabilis.