Abstract: A projection curtain is provided in the present invention. The projection curtain at least comprises a reflective layer and one of a colored layer, a diffusion layer, and a Fresnel lens layer. The Fresnel lens layer is a spherical Fresnel lens layer or an aspherical Fresnel lens layer. The Fresnel lens layer comprises a plurality of annular protrusions protruding from a plane, the plurality of annular protrusions are arranged in circular bands. A cross-sectional shape of each annular protrusion along a cross section perpendicular to the plane is a triangular shape or a multi-step shape or a free surface shape. The width of one side of each cross-sectional shape parallel to the plane gradually changes, and gradual change of the cross-sectional shape and the width thereof determines light gathering characteristics of the spherical Fresnel lens layer or the aspherical Fresnel lens layer. A surface of each annular protrusion has scattered microstructures.

Abstract: An electronic device and a functional module are provided. The electronic device includes a body and a functional module. The body has a first installation space, and a second limiting portion is disposed in the first installation space. The functional module includes a functional component and a drive apparatus. The drive apparatus is connected to the functional component. The drive apparatus includes an output shaft. The output shaft is connected to a first limiting portion, and the output shaft drives the first limiting portion to rotate between a first position and a second position. In a case that the first limiting portion is in the first position, the first limiting portion is fitted with the second limiting portion to restrict detachment of the functional module from the first installation space.

Abstract: The present invention relates to a method for preparing mesaconine and related intermediaries. Specifically, in the method for preparing mesaconine of the present invention, aconitine extracted from the Aconitum soongaricum Stapf. of aconitum plant is used as a raw material and subjected to alkalization, acetylation, N-de-ethylation, N-methylation, and hydrolysis to obtain mesaconine. The method for preparing mesaconine in the present invention is simple in operation, high in yield, environmentally friendly and pollution-free, and suitable for industrial production.

Abstract: The present invention relates to a method for preparing mesaconine and related intermediaries. Specifically, in the method for preparing mesaconine of the present invention, aconitine extracted from the Aconitum soongaricum Stapf. of aconitum plant is used as a raw material and subjected to alkalization, acetylation, N-de-ethylation, N-methylation, and hydrolysis to obtain mesaconine. The method for preparing mesaconine in the present invention is simple in operation, high in yield, environmentally friendly and pollution-free, and suitable for industrial production.

Abstract: This invention relates to the preparation of bis-isoquinoline derivatives of general formula (I) and salts thereof, which possesses multi-drug resistance (MDR) reversal activities. Drug compositions and formulations comprising bis-isoquinoline derivatives of general formula (I) and salts thereof are provided for use as sensitivity enhancers in cancer chemotherapy. Methods for inhibiting MDR by treatment with bis-isoquinoline derivatives are also provided.