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您的检索式：作者名="Guanglei Cong"
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| 1 | Investigation of Two-Dimensional Ultrasonic Surface Burnishing Process on 7075-T6 Aluminum显示文摘A novel two-dimensional ultrasonic surface burnishing process(2D-USBP)is proposed.7075-T6 aluminum samples are processed by a custom-designed 2D-USBP setup.Parameter optimization of 2D-USBP is conducted to determine the best processing strategy of 7075-T6 aluminum.A uniform design method is utilized to optimize the 2D-USBP process.U〔3(133)and 4(72)tables are established to conduct parameter optimization.Burnishing depth,spindle speed,and feed rate are taken as the control parameters.The surface roughness and Vickers hardness are taken as the evaluation indicators.It establishes the active control models for surface quality.Dry wear tests are conducted to compare the wear-resistance of the 2D-USBP treated sample and the original sample.Results show that the machining quality of 2D-USBP is best under 0.24 mm burnishing depth,5000 r/min spindle speed,and 25 mm/min feed rate.The surface roughness of the sample is reduced from 2517.758 to 50.878 nm,and the hardness of the sample surface is improved from 167 to 252 HV.Under the lower load,the wear mechanism of the 2D-USBP treated sample is mainly abrasive wear accompanied by delamination wear,while the wear mechanism of the original sample is mainly delamination wear.Under the higher load,the accumulation of frictional heat on the sample surface transforms the wear mechanisms of the original and the 2D-USBP treated samples into thermal wear. | Zhenyu Zhou Qiuyang Zheng Cong Ding Guanglei Yu Guangjian Peng Zhongyu Piao | 2021 | Chinese Journal of Mechanical Engineering2021，34，1： | 2 |
| 2 | Probiotic Escherichia coli Nissle 1917 protect chicks from damage caused by Salmonella enterica serovar Enteritidis colonization显示文摘As a foodborne pathogen of global importance,Salmonella enterica serovar Enteritidis(S.Enteritidis)is a threat to public health that is mainly spread by poultry products.Intestinal Enterobacteriaceae can inhibit the colonization of S.Enteritidis and are regarded as a potential antibiotic substitute.We investigated,in chicks,the anti-S.Enteritidis effects of Escherichia coli(E.coli)Nissle 1917,the most wellknown probiotic member of Enterobacteriaceae.Eighty 1-d-old healthy female AA broilers were randomly divided into 4 groups,with 20 in each group,namely the negative control(group P),the E.coli Nissle 1917-treated group(group N),the S.Enteritidis-infected group(group S)and the E.coli Nissle1917-treated and S.Enteritidis-infected group(group NS).From d 5 to 7,chicks in groups N and NS were orally gavaged once a day with E.coli Nissle 1917 and in groups P and S were administered the same volume of sterile PBS.At d 8,the chicks in groups S and NS were orally gavaged with S.Enteritidis and in groups P and N were administered the same volume of sterile PBS.Sampling was conducted 24 h after challenge.Results showed that gavage of E.coli Nissle 1917 reduced the spleen index,Salmonella loads,and inflammation(P<0.05).It improved intestinal morphology and intestinal barrier function(P<0.05).S.Enteritidis infection significantly reduced mRNA expression of angiotensin-converting enzyme 2(ACE2)and solute carrier family 6-member 19(SLC6A19)in the cecum and the content of Gly,Ser,Gln,and Trp in the serum(P<0.05).Pretreatment with E.coli Nissle 1917 yielded mRNA expression of ACE2and SLC6A19 in the cecum and levels of Gly,Ser,Gln,and Trp in the serum similar to that of uninfected chicks(P<0.05).Additionally,E.coli Nissle 1917 altered cecum microbiota composition and enriched the abundance of E.coli,Lactobacillales,and Lachnospiraceae.These findings reveal that the probiotic E.coli Nissle 1917 reduced S.Enteritidis infection and shows enormous potential as an alternative to antibiotics. | Shu Wu Qianyun Zhang Guanglei Cong Yunqi Xiao Yiru Shen Shan Zhang Wenchang Zhao Shourong Shi | 2023 | Animal Nutrition2023，，3： | 0 |
| 3 | Research Progress on the Effects of Dietary Fiber Regulating Gut Microbiota on Sows Reproductive Performance显示文摘Dietary fiber(DF)is an essential nutrient in sow diet.It can increase sow satiety and prevent constipation.It can also regulate sow gut microbiota,and the interaction between the two can regulate sows reproductive performance and metabolic function and the growth performance of offspring piglets.It can be seen that the benefits of DF in sow production are inseparable from the interaction of gut microbiota.This paper reviewed the effects of DF on the diversity of sows gut microbiota,and the effects of DF-gut microbiota interaction on sows gut microbiota,metabolism,ovulation and lactation,as well as on offspring production performance,aiming to provide a new strategy for the application and research in sow diet. | Guanglei CONG Shuangshuang XIA Chunxue LIU Fengyan YU Hanjing YU Fang ZHANG Yanjun DAI | 2022 | Agricultural Biotechnology2022，11，6： | 0 |
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