Abstract: A lipid delivery system, a virus-like structure (VLS) vaccine constructed therefrom, and a lipid particle capable of encapsulating an mRNA molecule encoding a SARS-CoV-2-specific antigen are provided. After the lipid particle encapsulates an mRNA molecule encoding a SARS-CoV-2 antigen, a SARS-CoV-2 S1 antigen protein can be embedded on a surface of an envelope structure of the lipid under specific buffer conditions to produce a VLS vaccine with an antigen-encoding mRNA molecule encapsulated inside and an outer membrane presenting a required viral antigen protein. The vaccine has a superior specific antibody-inducing ability to a SARS-CoV-2 mRNA vaccine and a polypeptide vaccine, can maintain a long-lasting high antibody level, and can also exhibit excellent immune binding abilities for the emerging different variants.

Abstract: The present invention relates to the field of pharmaceuticals, especially to the field of veterinary drugs, and more particularly to a crystal form of milbemycin A3 oxime, able to be characterized by the X-ray powder diffraction spectrogram, infrared absorption (IR) spectrogram, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA), etc. Furthermore, the present invention also relates to a method for preparing the crystal form of milbemycin A3 oxime and to a use of the crystal form of milbemycin A3 oxime as an insecticidal and acaricidal agent.

Abstract: The invention provides a spring arm device, comprising: a parallelogram linkage mechanism composed of a mobile side, a fixed side in parallel with the above-mentioned mobile side, an upper arm and a load arm respectively connected with the mobile side and the fixed side; a spring, one end of which is connected with the fixed side or the upper arm while the other end is connected with the mobile side or the load arm or the hinge joint between the mobile side and the fixed side; a pull rod used for installing the above-mentioned spring; a copular axle used for positioning the above-mentioned pull rod and a retainer used for installing the above mentioned copular axle; wherein, the above-mentioned retainer is positioned on the mobile side, or on the load arm or on the hinge joint between the mobile side and the load arm.

Abstract: The present invention relates to a photographic apparatus and more particularly pertains to a stabilizing rod for a video camera stabilizer which comprises a data processing circuit, wherein it further comprises memory units which are connected to the data processing circuit for receiving digital format signals from the data processing circuit and recording the digital format signals. The present invention provides a stabilizing rod for a video camera stabilizer which is connected to memory units and is therefore capable of recoding image content in digital format for future editing and playback.