2results about How to "Good mechanical properties" patented technology

This invention describes a modified silicate-polyurethane two-component grouting reinforcement material, comprising component A and component B, which are mixed in a 1:1 volume ratio before use. Component A, by mass percentage, consists of the following components: water glass: 94%; glycerol: 1%; glyceryl ester compounds: 1%; silane coupling agent: 1%; water: 3%. Component B, by mass percentage, consists of the following components: polymethylene polyphenyl polyisocyanate PM-200: 65%; dibutyl phthalate (DBP): 35%. This invention utilizes the synergistic effect of glyceryl ester compounds and silane coupling agents. The glyceryl ester compounds reduce the interfacial tension between the aqueous and oil phases and promote the uniform dispersion of the silane coupling agent. The silane coupling agent forms a chemical bridge between the inorganic and organic phases, enabling the originally incompatible aqueous and oily agents to form a homogeneous and compatible system. The resulting solidified body has a compressive strength of 24.6 MPa and a bond strength of 3.8 MPa, making it suitable for seepage prevention and sealing in underground engineering and for surrounding rock reinforcement.

This invention discloses a novel reverse transcriptase and its applications. The amino acid sequence of the reverse transcriptase is selected from any of the amino acid sequences shown in SEQ ID NO: 1 to SEQ ID NO: 19, or, obtained by mutating one or more amino acids of any of the above sequences, resulting in an amino acid sequence with at least 85%, 90%, or 95% identity to the original sequence and possessing reverse transcription activity. The genome-guided editing system containing the reverse transcriptase of this invention further includes a nucleic acid-programmable DNA-binding protein and pegRNA. Both the reverse transcriptase and the genome-guided editing system containing it can be used to target and modify the plant cell genome or to cultivate plants with genome modifications. This invention effectively overcomes the dependence of existing guided editing systems on single-structure chassis enzymes, thereby providing a rich reserve of underlying components for crop molecular design breeding.