A method for rapid identification of the species of pickled cotton stings
A pickling and rapid technology, which is applied in the direction of biochemical equipment and methods, microbial determination/inspection, etc., to achieve the effect of high accuracy, less time-consuming, and less sample volume
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Embodiment 1
[0053] 1. Desalinize the pickled cotton stings, change the water once every 12 hours, and change 4 times in total, use ethanol solution as the stock solution, store the dehydrated cotton stings in a solution with a final concentration of 70% ethanol (v / v), and store ;
[0054] 2. Take out 150 mg of the jellyfish stings stored in the ethanol solution, cut them into pieces, centrifuge at 10,000 rpm for 5 minutes, put them on a dust-free paper to absorb the water, and use the deep-processed food DNA extraction kit to extract jellyfish genomic DNA;
[0055] 3. Use 16S rRNA gene universal primers for PCR amplification, and store the products at -20°C;
[0056] 4. The PCR amplified product was digested with Hind III, Hpa I, Dra I and Xho I endonucleases, and the digested products were separated by 3% agarose gel electrophoresis and detected by imaging.
[0057] The result is as Figure 5 Shown, wherein, A represents Hind III, B represents Hpa I, C represents Xho I, and D represent...
Embodiment 2
[0060] 1. Purchase 4 kinds of commercially available pickled jellyfish from Shandong and Liaoning, numbered 1, 2, 3, 4, respectively, and carry out desalination treatment, change the water once every 12 hours, and change the water 4 times in total. Use ethanol solution as the stock solution, and dehydrate the jellyfish. The jellyfish is stored in a solution with a final concentration of 70% ethanol (v / v), for future use;
[0061] Among them, 1 represents the pickled jellyfish purchased from Yantai, Shandong, 2 represents the pickled jellyfish purchased from Yingkou, Liaoning, and 3 and 4 both represent the pickled jellyfish purchased from Dalian, Liaoning.
[0062] 2. Take out 150 mg of jellyfish stored in ethanol solution, cut it into pieces, centrifuge at 7500rpm for 10 minutes, put it on a dust-free paper to absorb the water, and use the deep-processed food DNA extraction kit to extract jellyfish genomic DNA;
[0063] 3. Use 16S rRNA gene universal primers for PCR amplifica...
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