A chopsticks structure, comprises a holding part and a clipping part, wherein the outer peripheral surface of said clipping part raises outwardly toward the tail end to form an elevation angle preferably in the range of 3-10 degree, such that, during clipping foods, the fulcrum of the holding force can be increased so as to favor the clipping of the food. Further, when said clipping part is configured as a tetragonal column, the contact between said clipping part and the food can be a linear or facial contact, such that the user can clip and hold securely food having smooth surface.

 
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> Monoclonal antibody selectively recognizing listeria monocytogenes, hybridoma producing the antibody, test kit comprising the antibody and detection method of listeria monocytogenes using the antibody

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