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Mitochondrial DNA variation and phylogeography of Old World camels
Ming Liang,Siren Dalai,Yi Li,Hai Le,He Jing,Ji Rimutu 아세아·태평양축산학회 2021 Animal Bioscience Vol.34 No.4
Objective: Old World camels are a valuable genetic resource for many countries around the world due to their adaptation to the desert environment. At present, Old World camels have encountered the challenge of unprecedented loss of genetic resources. Through our research, we would reveal the population structure and genetic variation in Old World camel populations, which provides a theoretical basis for understanding the germplasm resources and origin and evolution of different Old World camel populations. Methods: In the present study, we assessed mtDNA control region sequences of 182 individuals from Old World camels to unravel genetic diversity, phylogeography, and demographic dynamics. Results: Thirty-two haplotypes confirmed by 54 polymorphic sites were identified in the 156 sequences, which included 129 domestic and 27 wild Bactrian camels. Meanwhile, 14 haplotypes were defined by 47 polymorphic sites from 26 sequences in the dromedaries. The wild Bactrian camel population showed the lowest haplotype and nucleotide diversity, while the dromedaries investigated had the highest. The phylogenetic analysis suggests that there are several shared haplotypes in different Bactrian camel populations, and that there has been genetic introgression between domestic Bactrian camels and dromedaries. In addition, positive values of Tajima’s D and Fu’s Fs test demonstrated a decrease in population size and/or balancing selection in the wild Bactrian camel population. In contrast, the negative values of Tajima’s D and Fu’s Fs test in East Asian Bactrian camel populations explained the demographic expansion and/or positive selection. Conclusion: In summary, we report novel information regarding the genetic diversity, population structure and demographic dynamics of Old World camels. The findings obtained from the present study reveal that abundant genetic diversity occurs in domestic Bactrian camel populations and dromedaries, while there are low levels of haplotype and nucleotide diversity in the wild Bactrian camel population. Objective: Old World camels are a valuable genetic resource for many countries around the world due to their adaptation to the desert environment. At present, Old World camels have encountered the challenge of unprecedented loss of genetic resources. Through our research, we would reveal the population structure and genetic variation in Old World camel populations, which provides a theoretical basis for understanding the germplasm resources and origin and evolution of different Old World camel populations.Methods: In the present study, we assessed mtDNA control region sequences of 182 individuals from Old World camels to unravel genetic diversity, phylogeography, and demographic dynamics.Results: Thirty-two haplotypes confirmed by 54 polymorphic sites were identified in the 156 sequences, which included 129 domestic and 27 wild Bactrian camels. Meanwhile, 14 haplotypes were defined by 47 polymorphic sites from 26 sequences in the dromedaries. The wild Bactrian camel population showed the lowest haplotype and nucleotide diversity, while the dromedaries investigated had the highest. The phylogenetic analysis suggests that there are several shared haplotypes in different Bactrian camel populations, and that there has been genetic introgression between domestic Bactrian camels and dromedaries. In addition, positive values of Tajima’s D and Fu’s <i>Fs</i> test demonstrated a decrease in population size and/or balancing selection in the wild Bactrian camel population. In contrast, the negative values of Tajima’s D and Fu’s <i>Fs</i> test in East Asian Bactrian camel populations explained the demographic expansion and/or positive selection.Conclusion: In summary, we report novel information regarding the genetic diversity, population structure and demographic dynamics of Old World camels. The findings obtained from the present study reveal that abundant genetic diversity occurs in domestic Bactrian camel populations and dromedaries, while there are low levels of haplotype and nucleotide diversity in the wild Bactrian camel population.
Le Liu,Nuan Shao,Suyan Ding,Yi-ming Fang 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.5
This paper investigates the decoupling and coordinated tracking control problem for the speed and tension system of the reversible cold strip rolling mill. Using a diagonal matrix decoupling network and neural network disturbance observers, we propose a command filter-based backstepping control strategy. First, the diagonal matrix decoupling network is constructed to weaken the coupling between the speed and tension of the rolling mill system, which reduces the complexity of the system model effectively. Second, controllers are designed by combining the backstepping with the command filter, which solves the “explosion of complexity” problem in backstepping procedure, and optimizes the system’s control structure. Next, neural network disturbance observers are developed to observe the uncertain items of the system, which improve the tracking control precision of the system effectively. Theoretical analysis shows that all signals in the closed-loop system are uniformly ultimately bounded. Finally, simulation research is carried out on the speed and tension system of a 1422 mm reversible cold strip rolling mill; results show that using the proposed control strategy increased the dynamic response speed of the system by approximately 1s, and the stability precision improved by approximately 2000 N.
Le-Yong Yuan,Zun-Qiong Ke,Ming Wang,Yan Li 대한진단검사의학회 2013 Annals of Laboratory Medicine Vol.33 No.6
Background: Procalcitonin (PCT), C-reactive protein (CRP), and white blood cells (WBCs) are inflammatory markers used to diagnose severe bacterial infections. We evaluated the diagnostic role of these markers and compared their accuracy for spontaneous bacterial peritonitis (SBP) associated with chronic severe hepatitis B (CSHB). Methods: PCT and CRP concentrations, WBC count, and other hematological parameters were measured in serum from 84 well-characterized patients with CSHB, of whom 42 had SBP. Receiver operating characteristics (ROC) curve analysis was performed to assess the diagnostic accuracy. Results: PCT and CRP concentrations were significantly higher in the CSHB patients with SBP (n=42) than CSHB patients without SBP (n=42). PCT and CRP concentrations were more accurate than WBC count for the diagnosis of CSHB-associated SBP. The optimal cutoff value of PCT was 0.48 ng/mL. The PCT concentration was significantly correlated with the CRP concentration and WBC count. Conclusions: Serum PCT and CRP seems to be better markers than WBC for the diagnosis of CSHB patients with SBP.
Zhang, Zhi-Ming,Zhang, Yu-Mei,Yao, Feng,Yi, Ping,Huang, Shang,Liu, Jian-Yong,Xiang, Bang-De,Yuan, Wei-Ping,Li, Le-Qun Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.8
Objective: Patients with hepatocellular carcinoma (HCC) in stage Barcelona Clinic Liver Cancer (BCLC)-A were grouped based on whether they were accompanied with hepatitis B virus (HBV) infection or not so as to explore the clinical characteristics and prognostic conditions of HCC patients with non-HBV/hepatitis C virus (HCV). Materials and Methods: Clinical data of 64 stage BCLC-A HCC patients with non-HBV/HCV infection (observation group) who received radical hepatectomy in the Affiliated Cancer Hospital of Guangxi Medical University from January, 2006 to November, 2014 were retrospectively analyzed and compared with those of 409 stage BCLC-A HCC patients with HBV infection (control group) in corresponding period. Results: The postoperative 1-, 3- and 5-year recurrent rates of the observation group were 25%, 38.6% and 48.8%, with postoperative mean and median disease-free survival time being 49.1 months and 62.0 months, respectively. Additionally, the postoperative 1-, 3- and 5-year survival rates of observation group were 90.1%, 72.7% and 62.0%, with the mean and median survival times being 54.4 months and 70.0 months, respectively. Conclusions: The 1-year recurrent rate is the highest in HCC patients with non-HBV/HCV, and almost half of the patients have recurrence within 1 year, after which the recurrent rate decreases along with the time.
Shim, Ee Le,Lee, Min Ho,Lu, Ming-Yen,Kang, Chi Jung,Lee, Kyu-Wang,Choi, Young Jin American Scientific Publishers 2012 Journal of Nanoscience and Nanotechnology Vol.12 No.12
<P>Boron-doped microcrystalline diamond (BMD) and nanocrystalline diamond (BND) thin films were grown on Si substrates by microwave-assisted chemical vapor deposition, and their field emission properties were evaluated. BND exhibited a lower turn-on field and higher field enhancement factor than BMD. Furthermore, in a long-term emission stability test, BND showed only a 4% increase in the current density after 12 h of emission, whereas the current density of BMD decreased by - 59%. These results indicate that BND is a more stable and viable current emitter than BMD.</P>