Abstract: The present disclosure relates to an identification method of volatile flavor compounds in meat and use thereof in meat line identification. The identification method includes the following steps: step 1, sample treatment: selecting meat samples for incubation; step 2, sample analysis: analyzing gas samples of the meat samples obtained in step 1 by gas chromatography-ion mobility spectrometry (GC-IMS); and step 3, data analysis: qualitatively analyzing compounds using Library Search software of a gas chromatograph-ion mobility spectrometer to obtain a composition and peak intensities thereof, and establishing visual fingerprints according to data of relative ion peak intensities of the gas samples. According to the method, the trace volatile flavor compounds in the meat can be rapidly identified, featuring stable results, short analysis time, and visualization.

Abstract: A mobile DR applicable to in-vivo detection of multi-thoracolumbar variations in equine animals and a use method are provided. The DR mainly comprises four aspects: (1) a digital flat-panel X-ray imaging system; (2) equine animal retaining device system (radiography bed) applicable to different body sizes; (3) radiography parameters applicable to equine animals of different body sizes and at different developmental stages; and (4) a stitching system Polaris for radiographed pictures. The digital flat-panel X-ray imaging system comprises an X-ray tube, a beam limiting device, a high-voltage generator, a flat-panel detector, an image acquisition workstation.

Abstract: The invention belongs to the pharmaceutical manufacturing field, which relates to a novel process for the preparation of substituted phenylacetic acids derivatives, especially relates to the preparation of 2-(4-(2-oxocyclopentyl)phenyl)propanoic acid. The process for the preparation of the precursor form of loxoprofen which use 1,4-di-halobenzyl compounds or disubstituted benzyl compounds as starting material, is through the substitution reaction of cyclopentanone groups or its precursor compounds. Wherein X is halogen, L1 is a suitable leaving group selected from halogen, OH, OMs, OTs, OTf and the like; L2 is a suitable leaving group selected from halogen, CN, OH, —CH2OH, —CHO, CH3NO2, ester group, —NR4R5, OTf, OTs, OMs, —C?CR6, —C?CR7 and the like, wherein R4, R5, R6, R7 are short chain alkyl groups; Z is cyclopentanone group and its precursor form selected from and the like; R3 is short chain alkyl groups.