32results about How to "Preserve the characteristic structure" patented technology

The invention discloses fluazinam hapten, artificial antigen and antibody, and preparation methods and applications thereof. The fluazinam hapten provided by the invention not only retains the characteristic structure of fluazinam, but also makes the immune The originality is obviously enhanced, and it has a carboxyl group that can be coupled with the carrier protein; the fluazinam immunization antigen obtained by coupling the fluazinam hapten with the carrier protein is used to immunize animals, which is more conducive to stimulating the animal's immune response to produce specificity A stronger and more sensitive antibody, the sensitivity of the antibody to fluazinam can reach 0.1 μg / L, and the cross-reaction rate with other pesticides is low, which provides a basis for the subsequent establishment of various immunoassay methods for fluazinam.

The invention discloses a pregabalin artificial hapten, an artificial antigen as well as a preparation method and application of the pregabalin artificial hapten and the artificial antigen. The molecular structural formula of the pregabalin artificial hapten is as shown in formula (I), and the molecular structural formula of the pregabalin artificial antigen is as shown in formula (II). The application refers to the application of the pregabalin artificial antigen in preparation of an anti-pregabalin antibody. The pregabalin artificial hapten maximally retains the characteristic structure of pregabalin, has an active group capable of being coupled with carrier protein, and can be used as an antigenic determinant; the further prepared pregabalin artificial antigen can be immunized to obtain an anti-pregabalin antibody with high affinity, high sensitivity and strong specificity, the titer of immune serum obtained by immunizing a New Zealand white rabbit reaches up to 1: 90000, and the pregabalin artificial antigen can be used for rapid and accurate immunodetection and immunoassay of pregabalin.

The invention discloses a prochloraz hapten, an artificial antigen and an antibody as well as a preparation method and application thereof. The prochloraz hapten provided by the invention not only retains the characteristic structure of the prochloraz hapten to the greatest extent, and makes the immunization of the prochloraz hapten The originality is obviously enhanced, and it has a carboxyl group that can be coupled with the carrier protein; the prochloraz immunization antigen obtained by coupling the prochloraz hapten with the carrier protein is used to immunize animals, which is more conducive to stimulating the animal's immune response to produce specificity Stronger and more sensitive antibody, the sensitivity of prochloraz antibody can reach 0.1μg / L, and the cross-reaction rate with other pesticides is low, which provides a basis for the subsequent establishment of various immunoassay methods for prochloraz.

The invention discloses a difenoconazole hapten, an artificial antigen and an antibody as well as a preparation method and application thereof. The difenoconazole hapten provided by the invention not only retains the characteristic structure of The immunogenicity of the difenoconazole hapten is obviously enhanced, and it has a carboxyl group that can be coupled with the carrier protein; the difenoconazole artificial antigen obtained by coupling the difenoconazole hapten with the carrier protein is used to deimmunize Animals are more conducive to stimulating the immune response of animals to produce antibodies with higher specificity and higher sensitivity. The sensitivity of difenoconazole antibodies can reach 0.05 μg / L after detection, and the cross-reaction rate with other triazole pesticides is low. It provides a basis for the subsequent establishment of various immunoassay methods for difenoconazole.

The invention discloses an ethyl sulfate artificial antigen, a preparation method and an application thereof. The invention uses 2-aminoethanol hydrogen sulfate as a raw material to prepare an ethyl sulfate artificial antigen, and introduces 2-(4-(methyl bromide) into the amino group. base) phenyl) acetic acid linking arm to prepare an ethyl sulfate hapten, which reacts with N-hydroxysuccinimide and N,N-cyclohexylcarbodiimide to obtain an active ester, which is combined with The protein coupling reaction was carried out to obtain ethyl sulfate artificial antigen. The present invention only needs one step to obtain the hapten, the process is simple, the source of raw materials is not limited, and it also retains the characteristic structure of ETS, which has good specificity; the linker introduced by the present invention can maximize the potential of the antigen Immunogenicity, enhance the immune effect, stimulate animals to produce antibodies, and can effectively make up for the shortcomings of ETS, which is difficult to stimulate the body to produce antibodies because of its too simple structure.

The present invention discloses sorbic acid hapten, artificial antigen, antibody and its synthesis method and application. In the present invention, two kinds of sorbic acid haptens with different structures are provided, wherein the sorbic acid hapten with the structure shown in formula () is used as The hapten for sorbic acid immunization, the hapten for sorbic acid immunization is highly similar to the target analyte sorbic acid, retains the characteristic structure of sorbic acid to the greatest extent, and can better expose the epitope of the hapten, making sorbic acid The immunogenicity of the hapten is obviously enhanced, and it has an aldehyde group that can be coupled with the carrier protein; the sorbic acid immunization antigen obtained after the hapten is coupled with the carrier protein is used to immunize animals, which is more conducive to stimulating animals. The immune response produces antibodies with stronger specificity and higher sensitivity, and the IC of sorbic acid antibody is detected by indirect competitive ELISA 50 It is 11mg / L, which provides the basis for the subsequent establishment of various immunoassay methods for sorbic acid.