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Copyright of Nonferrous Metals (Extractive Metallurgy) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] To study the microbial diversity and the microbial community composition of bucket chicken at different processing. [Method] The V1-V9 region of 16S rRNA of the bacteria in the bucket chicken samples were sequenced by the PacBio full-length highthroughput sequencing technology. [Result] The 67 287 effective sequences and 2 300 OTU were obtained. There were some differences in the bacterial communities of the bucket chicken in different processing stages. A total of 15 bacterial phylum were obtained and the dominant bacteria are Proteobacteria, Bacteroidetes and Actinobacteria, Firmicutes, Deinococcus-Thermus, Verrucomicrobia; at the genus level, a total of 250 bacterial genus were obtained, the dominant bacteria genus were Pseudomonas, Acinetobacter, Staphylococcus, Brochothrix, Mesorhizobium, Janthinobact erium, Flavobacterium, Shewanella, Kaistella, Psychrobacter; at the species level, a total of 621 bacterial species were obtained, and the dominant species were Sediminibacterium magnilacihabitans, Bradyrhizobium sp 011516665, Pseudomonas fragi, Macrococcus caseolyticus, Shewanella baltica. [Conclusion] The microbial communities in the three samples of recooked bucket chicken, 12-hour bucket chicken and soup obtained in the same processing environment were similar, but there are some differences in relative abundance. The dominant bacterial composition of fresh bucket chicken produced at another processing site and fresh chicken was different from other samples. [ABSTRACT FROM AUTHOR]

In order to solve the problem that the transmission error and dynamic contact deformation of flexible gear were usually ignored in the gear dynamics research, a flexible multi-body dynamics research method of gear was proposed. Firstly, the three-dimensional model of double involute gear was established by SolidWorks, the gear was made flexible by ANSYS modal analysis, and the rigid body and flexible body dynamics models of double involute gear were respectively established by ADAMS. Then, Hertz contact theory and multi-body dynamics theory were used to respectively simulated rigid and flexible gears. Finally, by comparing the simulation results of rigid and flexible gear, the influence of elastic deformation and vibration of flexible gear on the dynamic characteristics of double involute gear was analyzed, and the tooth deformation of double involute gear and ordinary involute gear was compared and analyzed. The results show that, after the double involute gear gets flexible, taking the average value to calculate the vibration angular velocity of the slave wheel, the average error between the simulation value and the theoretical value is 0.36%, the error value of the rigid-body gear is 56%, and the gear transmission error is reduced. The simulation values of dynamic contact forces of rigid and flexible gears are not different from the theoretical values, and the amplitude of dynamic meshing forces of flexible gears is stable, indicating that the flexible gears play a damping effect in the meshing process. The tooth deformation of the flexible gear is periodic in the process of transmission; during meshing in and meshing out, the tooth translation deformation and angular deformation of double involute gears fluctuate stably, both smaller than those of ordinary involute gears. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering for Thermal Energy & Power / Reneng Dongli Gongcheng is the property of Journal of Engineering for Thermal Energy & Power and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)