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Copyright of China Condiment is the property of China Condiment 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Zhengzhou University (Natural Science Edition) is the property of Journal of Zhengzhou University (Natural Science Edition) Editorial Office 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 National University of Defense Technology / Guofang Keji Daxue Xuebao is the property of NUDT Press 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 Fire Safety Science is the property of Fire Safety Science Editorial Office 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 Tobacco Science & Technology is the property of Tobacco Science & Technology 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 Mycosystema is the property of Mycosystema Editorial Board 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 Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press 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 Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics 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 Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences 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 Geography & Geographic Information Science is the property of Geography & Geo-Information Science Editorial Office 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 Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences 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 Mechanical & Electrical Engineering is the property of Mechanical & Electrical Engineering Magazine 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 Architecture & Civil Engineering is the property of Chang'an Daxue Zazhishe 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.)

Aiming at the problem that deformation and error reduced the meshing performance of assembled double helical gears transmission, the assembled double helical gear of the power transmission system of plunger pump was taken as the model, a study of the meshing characteristics of the double helical gears was executed by means of theoretical strength calculation, error analysis, simulation modification and test verification. Firstly, the structural form of the gear pair was analyzed, also, the contact strength and bending strength of the gear pair were analyzed and calculated, and the influence factors of gear contact strength and bending strength were analyzed. Then,the error forms and compensation measures of the gear type were analyzed and discussed, also, the shaft deformation and tooth modification characteristics of assembled double helical tooth gear shaft were analyzed in the aspect of theory. Finally, based on the software platform of KISS soft software, the modification quantities of the gears were analyzed and calculated. The modification parameters were optimized by comparing the meshing spots, transmission errors and contact stress of the gear pairs with different modification quantities. And moreover, the results were used to process the sample products as a validation. The analysis results show that after compensating the influence of deformation and error on gear transmission characteristics, the peak-to-peak value of transmission error is reduced by 38%, the gear surface line load is reduced by 41.3%, the contact area of the gear surface is evenly distributed along the tooth direction, and the transmission meshing performance is improved. [ABSTRACT FROM AUTHOR]

Copyright of Corrosion & Protection in Petrochemical Industry is the property of Corrosion & Protection in Petrochemical Industry Editorial Office 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.)

Frost heave can seriously damage the trapezoidal concrete-lined canal with an open system in cold regions. In this study, the frost heave failure model of canal lining was established to consider the frost heave force and adfreeze force. The Winkler elastic foundation plate theory was also used to describe the relationship between the canal lining and frozen soil foundation. Specifically, the top of the canal slope and the soil of the channel foundation were frozen together, and the foot of the slope and the bottom plate were set as the mutual hinge constraints. The two ends of the plate at the depth direction were assumed to be simply supported boundaries. The adjacent canal lining joints were mostly filled with soft elastic waterproof materials, particularly for the relatively large deformation. The adjacent canal lining board joints were then assumed to be free boundaries. The analytical solution of the model was obtained to clarify the influence of groundwater depth and geometric parameters of canal lining. A comparison was finally made to verify the field observation and calculation. The results show that the bottom plate was subjected to the uniform force of frost heaving. There was an uneven distribution of the internal force and stress along the height direction of the plate. The stress at the free boundary was also slightly larger than that at other positions. The bending moment and shear force of the slope plate were unevenly distributed, where the maximum deflection was 2/3 from the top to the foot of the slope, and the maximum bending moment was close to the bottom plate. A similar distribution of the stress and internal force was also better consistent with the existing research. The maximum stress occurred at the maximum deflection position. The torque was distributed symmetrically along the center of the canal lining, where the maximum was at four corners. It infers that it was easy to produce a stress concentration at the corners. Compared with the beam theory, the plate theory showed that the deflection and internal force of the lining plate were not uniformly distributed along the plate width direction, where the deflection and bending moment were greater at the free boundary (longitudinal expansion joint), and the torque was distributed at the corner of the canal lining. The tangential force posed little influence on the frost heaving of the canal. The maximum deflection of the canal only increased by 0.7 mm, when adding the tangential force. But the adfreeze force produced an eccentric bending moment on the canal lining, indicating a great increase in the overall bending moment of the canal lining. Therefore, the adfreeze force should be considered in the antifreeze design of the canal lining. The relationship between groundwater and frost heave was dominant in the prevention of frost damage to the canal. Different thicknesses of lining plate should be selected for the working conditions of different groundwater depths. The frost heave displacement of the slope plate gradually decreased with the increase of groundwater depth. There was no variation in the position of the maximum frost heave displacement section. Therefore, the increasing thickness of the canal lining can also effectively prevent frost heave damage to the canal. The thick canal lining or high concrete strength can also be expected to prevent freezing damage, particularly for the high water table. As such, the safe range of canal lining thickness can be obtained, according to the canals with different groundwater levels. The finding can provide a strong referent and theoretical basis for the frost-heave-resistant design of cast-in-place concrete trapezoidal canals. [ABSTRACT FROM AUTHOR]

Copyright of Journal of South China University of Technology (Natural Science Edition) is the property of South China University of Technology 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 Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences 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 Food Research & Development is the property of Food Research & Development 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 Coatings & Protection / Tuceng yu Fanghu is the property of Coating & Protection Editorial Office 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 Frontiers of Computer Science & Technology is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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 Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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] This study intended to explore and verify the acaricidal mechanism of the strain Wl at the molecular level by constructing the mutant of strain Wl and detecting its acaricidal and antibacterial activities, so as to provide a new microbial resource and control strategy for the prevention and control of two-spotted spider mites, which would lay a foundation for the subsequent development and utilization of more microbial resources, and also provide a theoretical basis for the development and application of new microbial acaricides. [Method] The active compounds of secondary metabolites of B. amyloliquejaciens Wl were studied in the early stage, and it was confirmed that the acaricidal active substances were diketopiperazines, macrolides, bacimethrins and other compounds. Macrolactin A was the main acaricidal active substance in macrolide compounds, and synthesized by the mln gene cluster. By constructing knockout integration vector pBS-mlnBkanR and transforming it into natural competent cells of the Wl strain, the macrolactin A biosynthesis-defective mutant Wl timlnB : : kanR was obtained. The successful construction of the knockout mutant was confirmed by PCR amplification, product sequencing and HPLC-MS/ MS technology, and its acaricidal and bacteriostatic activities were detected. [ Result] The knockout of the mlnB gene not only resulted in the inability of stain Wl to biosynthesize macrolactin A, but also weakened its antagonistic activity against pathogens causing soft rot of cabbage, citrus canker, black rot of cabbage, and bacterial wilt of Solanaceae. Compared with 73 . 33 % - 77. 22 % of the leathality of the Wl wildtype strain, the acaricidal activity of the macrolactin A biosynthesis defective mutant was decreased by 46. 66% - SO. 55% . [Conclusion] Macrolactin A synthesized by B. amyloliquefaciens Wl strain had the activity of killing two-spotted mites, and can inhibit the activity of pathogenic bacteria of Erwinia carotovora subsp. carotovora,Xanthomonas citri subsp. citri, Xanthomonas campestris pv. campestri and Ralstonia solanacearum. After the synthesis of macrolactin A was blocked, the activity of Wl strain was obviously weakened. [ABSTRACT FROM AUTHOR]

Copyright of Piezoelectrics & Acoustooptics is the property of Piezoelectric & Acoustooptic 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 Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office 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] The present paper aims to explore the feasibility of DNA barcoding applied to the identification of flies in Yunnan province, China, and to set up DNA database for flies in Yunnan. [Method ] Diptera insects trapped by microbial attractants in Hekou county, Dali city, Jianchuan county, Mengzi city and Yuanjiang county of Yunnan province were identified by CO! gene sequence, and their genetic distances of families, genera and species taxa were compared. [Result] Forty-three species of insects belonging to 21 genera, 7 families including Drosophilidae, Tephritidae, Calliphoridae, Fanniidae, Muscidae, Sarcophgidae and Anthomyiidae, were collected in the 5 places in Yunnan. lntraspecific divergence ranged between 0. 002 and 0. 098, interspecific divergence average 0. 156. Phylogenetic tree showed that most of the same species gathered closely although some species were not in line with their morphology based on their sequences data. The average genetic distances among species of Drosophilidae, Tephritidae, Calliphoridae, Fanniidae, Muscidae, Sarcophgidae and Anthomyiidae were 0. 151, 0. 225, 0. 123, 0. 143, 0. 158, 0. 158 and 0. 103, respectively. The intraspecific genetic distances were 0. 006, 0. 025, 0. 012, 0. 013, 0. 011, 0. 006 and 0. 01, respectively. The genetic distances among 7 families were 25. 2, 10. 2, 10. 2, 11. 0, 14. 4, 27 . 3 and 10. 3 times of intraspecific genetic distances, respectively. [Conclusion] DNA barcoding based on CO/ gene can be used as a complementary means for morphological identification of some common flies in Yunnan province. [ABSTRACT FROM AUTHOR]

Copyright of Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics 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 Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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 Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office 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 Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office 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 China Brewing is the property of China Brewing Editorial Office 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 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 Electronic Components & Materials is the property of Electronic Components & Materials 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 Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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.)