3results about How to "Firm texture" patented technology

This invention discloses a tissue culture method for *Gynostemma pentaphyllum*, comprising the following steps: S1: Pretreatment of *Gynostemma pentaphyllum* before the inflorescence emerges, obtaining sterilized inflorescences through aseptic operation; S2: Induction of callus tissue from the inflorescence stalk segment retaining the base of the flower bud, inoculated into a callus induction medium to obtain white callus tissue; S3: Greening of callus tissue, after removing the inflorescence stalk segment from the white callus tissue obtained in S2, transferred to a callus greening medium; S4: Induction and proliferation of shoot clusters, transferring the green callus tissue obtained in S3 to a shoot cluster induction and proliferation medium to cultivate *Gynostemma pentaphyllum* seedlings; S5: Rooting culture of robust seedlings to obtain rooted *Gynostemma pentaphyllum* plants. The advantages of this invention compared to existing technologies are: it provides a tissue culture method for inducing callus tissue and plant regeneration from the inflorescence stalk segment retaining the base of the flower bud of *Gynostemma pentaphyllum*, providing an effective tissue culture system for the commercial in vitro propagation of *Gynostemma pentaphyllum* seedlings.

The utility model discloses a novel braided mesh pipe, including the mesh pipe body, the mesh pipe body includes a plurality of first function strands and second function strands, and is woven through a plurality of first function strands and second function strands, and a plurality of mesh holes are formed between a plurality of first function strands and second function strands, and the first function strand includes PET monofilament and PPS monofilament, and is made through the spiral twist of PET monofilament and PPS monofilament, and the second function strand includes PA monofilament and polypropylene monofilament, and is made through the spiral twist of PA monofilament and polypropylene monofilament, and the mesh pipe body is plain weave structure, and the number of strands of PET monofilament and PPS monofilament is 2:1, and the number of strands of PA monofilament and polypropylene monofilament is 2:1, and the diameter of PET monofilament, PPS monofilament, PA monofilament and polypropylene monofilament is 0.2 0.4mm, and a plurality of mesh holes are square or rhombic, and the utility model discloses reasonable structure has the advantages of simple design, diversified function, convenient to use.

The application discloses an ion exchange composite membrane, a preparation and application thereof, and a hydrogen production device for electrolyzing water, and a preparation method of the ion exchange composite membrane comprises the following steps: (1) placing a perfluorosulfonyl fluoride resin membrane, a reinforcing mesh cloth and the perfluorosulfonyl fluoride resin membrane in sequence and superimposing to obtain a superimposed membrane, and then performing hot pressing to obtain a perfluorosulfonyl fluoride composite membrane; and (2) performing hydrolysis transformation on the perfluorosulfonyl fluoride composite membrane to obtain the ion exchange composite membrane. The mesh cloth wire structure of the perfluorosulfonic acid ion exchange composite membrane prepared by the method is kept intact, the mesh cloth is uniformly distributed, the membrane body is flat and free of bubbles, the resin matrix and the reinforcing mesh cloth layer do not separate after long-time high-temperature water soaking treatment, the tensile strength is higher, the elongation at break is lower, the surface swelling rate is lower, the structure is denser, the stability is higher, and the performances are better than those of a dipping coating membrane.