517 results about "Zearalenone" patented technology

The invention discloses a mycotoxin detoxification agent for feed and a preparation method and a feed additive thereof, and belongs to the field of feed additives. The mycotoxin detoxification agent can be used for detoxification of feed raw materials and compound feed of mycotoxin polluted corn, grains and the like. The mycotoxin detoxification agent consists of modified montmorillonite, yeast cell wall, chitosan and the like; and the preparation method has simple process. The novel mycotoxin detoxification agent for feed can effectively remove pollution of multiple mycotoxins such as aflatoxin, zearalenone, T2 toxin, vomitoxin and the like in the feed raw materials and the feed of the corn, the grains and the like, and prevent various diseases of livestock and poultry because of eating the mycotoxin polluted feed. The mycotoxin detoxification agent has simple preparation process, stable and controllable quality, convenience in use and low price, meanwhile has the advantages of supplementing nutrients, improving the disease resistance of cultured animal bodies and avoiding adsorbing nutrient elements in the feed, and guarantees the health and safety of the cultured animals.

The invention discloses a zearalenone toxin gradation enzyme and a coding gene and application thereof. The enzyme is derived from Gliocladiumroseum and is protein in (a) or (b): (a) protein consisting of an amino acid residue sequence of SEQIDNO: 1 in a sequence table; and (b) protein which is derived from the SEQIDNO: 1, has a zearalenone degradation activity and is formed through carrying out substitution and/or deletion and/or addition of one or a plurality of amino acid residues on the amino acid residue sequence of SEQIDNO: 1 in the sequence table. The zearalenone toxin degradation enzyme has highly-efficient degradation effect on zearalenone (ZEN).

The invention discloses a bacillus amyloliquefaciens and an application thereof in degradation of zearalenone and provides a bacillus amyloliquefaciens NS2 which is assigned the accession number CGMCC No.8726. An experiment in the invention proves that the amyloliquefaciens NS2 is disclosed in the invention. The zearalenone can be degraded efficiently when a fermentation liquor of the amyloliquefaciens NS2 is added to the zearalenone with dissolving and mixing uniformly. The amyloliquefaciens NS2, used as a biological material for degrading the zearalenone, has a good application prospects in exploitation of not only novel biodegradation inoculants but also novel biodegradation sterile preparations.

The invention relates to a bacterial strain for degrading zearalenone toxin, which is characterized in that: the preserving number of the bacterial strain is CCTCC NO: M2010053; and the Genbank accession number of the bacterial strain 16S rDNA is HM372880. When in application, the bacterial strain is prepared into liquid bactericide or solid bactericide which can degrade the zearalenone toxin for degrading the zearalenone toxin in grains or fodders. The bacterial strain has the advantages that: the process of using the bacterial strain to degrade the zearalenone toxin is free of secondary pollution, thereby improving the quality of agricultural products and ensuring the edible safety of people and livestock; and the bacterial strain is used for producing various preparations which are used for degrading the zearalenone toxin the bacterial strain, which is not only low in production and using cost, but also safe in use.

Disclosed is modified montmorillonite capable of adsorbing zearalenone. Natural montmorillonite is pretreated in processes including acid activation and the like and then reacts with cetyl trimethyl ammonium bromide to obtain the modified montmorillonite. A pH (potential of hydrogen) value is found out to be the most important factor after deep research on various factors affecting a modification effect. In addition, use level of modifier, modification temperature and duration are also important. Accordingly, an optimal modification condition is realized. X-ray diffraction of the montmorillonite before and after modification, Fourier transform infrared analysis, scanning electron microscope analysis and various adsorption tests show that the modified montmorillonite excellently adsorbs the zearalenone, is unaffected by nutrients during adsorption, and is suitable to be used as a feed additive.

The invention discloses a method for biodegrading mycotoxin in feed by using a mycotoxin degrading enzyme, and belongs to the field of feed resources. The method comprises the following steps: directly mixing degrading complex enzyme of aflatoxin, zearalenone and deoxynivalenol with moldy feed raw materials, concentrated feed or complete feed; and detoxifying the feed polluted by the mycotoxin to ensure that the degradation rate of the mycotoxin reaches over 80 percent. The method can effectively remove the mycotoxin from the feed, improves animal health and animal production performance, and can effectively solve the problem of feed resource shortage in China.

The invention discloses Bacillus subtilis for effectively degrading zearalenone and application thereof. The preservation serial number of the Bacillus subtilis ASAGF141 is CGMCC No.9463. The invention further provides bactericide containing preserved strains and a preparation method of the bactericide; besides, the invention further provides application of the strains or the bactericide to degradation of the zearalenone. According to the Bacillus subtilis for effectively degrading zearalenone and application thereof, the trains can completely degrade the 20 microgram/ml zearalenone within a short time, and the degradation rate is 10%.

The invention relates to a ZEN (zearalenone) degrading enzyme gene and a high-yield strain. The ZEN degrading enzyme gene comprises DNA molecules of (a), (b) or (c), wherein (a) has DNA molecules of a nucleotide sequence shown in SEQ ID NO.1; (b) hybridizes with the nucleotide sequence in (a) under a strict condition and encodes DNA molecules of protein with ZEN degrading enzyme activity; (c) has DNA molecules of a nucleotide sequence with 90% or higher of homology with the nucleotide sequence in (a) or (b). The invention establishes the high-yield strain for producing ZEN degrading enzymes through the sequences and further provides a high-density fermentation method. ZEN degrading enzymes can be subjected to efficient secretion expression through the high-yield strain with the high-density fermentation method, and ZEN can be quickly and efficiently degraded during fermentation.

The invention discloses a preparation method of an antibacterial attapulgite zearalenone adsorbent. The preparation method comprises the following steps: performing acidification treatment on attapulgite with a compound acidifier, screening to remove quartz and carbonate impurities, adding an ionic liquid surfactant and performing reaction for 4-12 hour at the temperature of 40-90 DEG C; and separating, washing, drying and crushing the product to obtain the antibacterial attapulgite zearalenone adsorbent. The prepared attapulgite zearalenone adsorbent is not only capable of adsorbing and removing mycotoxin out of feed and also has an antibacterial function and the usage of antibiotics in the feed can be reduced.

The invention discloses pseudomonas aeruginosa and an application thereof in degrading zearalenone. The preservation number of the pseudomonas aeruginosa is CGMCC No.8727. As a biologic material for degrading zearalenone, the pseudomonas aeruginosa is good in application prospect in no matter developing a novel biologic degrading bacterium agent or a biologic degrading bacterium-free preparation.

A microorganism for the biological inactivation or detoxification of mycotoxins, in particular ochratoxins, which is selected from bacteria and/or yeasts, which cleaves the phenylalanine group of the mycotoxins, in particular ochratoxins, as well as a method for biologically inactivating or detoxifying mycotoxins, in particular ochratoxins, in food products and animal feeds by the aid of a microorganism, and the use of the microorganism(s).

The invention relates to the field of clay modification, in particular to phospholipid modified clay and a preparation method and application thereof. A modifying agent for the modified clay comprises phospholipid, and the modified clay is applied to a mycotoxin adsorbent. The phospholipid and the clay are innovatively compounded to prepare the mycotoxin adsorbent, and since phospholipid which belongs to feed additive ingredients is allowed to be added into feed, the safety problem possibly caused by traditional compounding of quaternary ammonium salt and the clay is solved. The compound mycotoxin adsorbent is excellent in adsorption effect on various toxins including aflatoxin, zearalenone and the like.

The invention discloses bacillus amyloliquefaciens capable of degrading ZEN (zearalenone) efficiently and an application of the bacillus amyloliquefaciens. The collecting number of the bacillus amyloliquefaciens ASAGF142 is CGMCC (China General Microbiological Culture Collection Center) No. 9464. The invention further provides an inoculant comprising the collected strain and a preparation method of the inoculant. Besides, the invention provides the application of the strain or the inoculant in degradation of ZEN. The strain can degrade 20 mu g/ml of ZEN completely in short time, and the degradation rate is 100%.

The invention relates to an ELISA kit for detecting zearalenone, the detection is rapid, sensitive, accurate, quantitative, simple in operation, low in requirements on sample purity and strong in specificity, thereby being particularly applicable to the detection of large quantities of samples; and the invention also provides a preparation of the kit and a detection method. The kit comprises washing liquid, color developing liquid A, color developing liquid B and stop solution, and the kit is characterized in that: the kit also comprises a coated plate, a zearalenone standard product, a zearalenone monoclonal antibody freeze-dried product and an enzyme-labeled goat anti-mouse antibody free-dried product; when in detection, the coated plate is taken, 50mu1-100mu1 of the ZEN standard product or a well processed sample is added into the respective micropores, 50mul-100mul of the anti-ZEN antibody is added, the incubation is carried out at 35 DEG C-45 DEG C for about 0.5 hour-1 hour, the washing liquid is used for washing for 3 times-5 times, 50mu1-100mu1 of the horseradish peroxidase (HRP)-goat anti-mouse antibody is added, the incubation is carried out at about 35 DEG C-45 DEG C for about 0.5 hour-1 hour, the washing liquid is used for washing for 3 times-5 times, 50mu1-100mu1 of the color developing liquid A and 50mu1-100mu1 of the color developing liquid B are added, the mixture is placed still in the dark for 10 minutes-20 minutes, then the stop solution is added, the absorbance value is measured at 450nm, and the ZEN content in the sample is calculated from a standard curve.

The present invention relates to a method for detoxification of feed products contaminated by the mycotoxin zearalenone.

The invention relates to zearalenone degrading enzyme and a mutant as well as a coding gene and application thereof. The degrading enzyme and the mutant have amino acid sequences shown as SEQ ID NO.1and SEQ ID NO.3, or the degrading enzyme and the mutant are conservative mutants obtained by missing, replacing, inserting or/and adding one or several amino acid on the basis of amino acid sequencesshown as SEQ ID NO.1 and SEQ ID NO.3. The zearalenone degrading enzyme and the mutant have the advantages of high enzyme activity, good temperature and pH tolerance and the like, and can be widely applied to enzymolysis of zearalenone and several derivatives of the enzymolysis; the substrate range is wide.

The invention relates to an immunochromatographic test strip for synchronously detecting mixed pollution of aflatoxin and zearalenone, a preparation method and application thereof. The test strip includes a paperboard. An absorbent pad, a detection pad, a gold labeled pad and a sample pad are sticked on one side of the paperboard from top to bottom. Adjacent pads are in overlapping connection at joints. The detection pad adopts a nitrocellulose membrane as a base pad, which is provided with a transverse control line and detection lines. The two detection lines in internal distribution are positioned below the quality control line, and are respectively coated with a zearalenone-bovine serum albumin conjugate and an aflatoxin B1-bovine serum albumin conjugate. The quality control line is coated with a rabbit antimouse polyclonal antibody. The gold labeled pad is horizontally sprayed with a nanogold labeled anti-aflatoxin universal monoclonal antibody and a nanogold labeled anti-zearalenone monoclonal antibody. The immunochromatographic test strip can be used for simultaneously detecting the content of fungaltoxins aflatoxin and zearalenone in a sample, and has the characteristics of simple operation, rapidity, and high sensitivity.

The invention relates to a zearalenone hydrolase ZHD101 mutant and a method for hydrolyzing zearalenone by using the mutant. The mutant is obtained by introducing mutations at three key sites of the wild-type zearalenone hydrolase ZHD101. Compared with wild-type ZHD101, the ZHD101 mutant has the advantages that the specific activity for ZEN hydrolysis is improved by at least 75% under the acidic condition (pH 5.5); also, the catalytic efficiency (kcat/KM) for ZEN hydrolysis under acidic conditions (pH 5.5) can also be increased by as much as 40% compared with a wild-type ZHD101. Therefore, a foundation is laid for further improving the catalytic activity of the enzyme and realizing the industrial application under the acidic condition.