AIM:To test the pathogenicity of pseudorabies virus(PRV)variant HN1201 and compare its pathogenicity with a classical PRV Fa strain.METHODS:The pathogenicity of the newly-emerging PRV variant HN1201 was evaluated by d...AIM:To test the pathogenicity of pseudorabies virus(PRV)variant HN1201 and compare its pathogenicity with a classical PRV Fa strain.METHODS:The pathogenicity of the newly-emerging PRV variant HN1201 was evaluated by different inoculating routes,virus loads,and ages of pigs.The classical PRV Fa strain was then used to compare with HN1201 to determine pathogenicity.Clinical symptoms after virus infection were recorded daily and average daily body weight was used to measure the growth performance of pigs.At necropsy,gross pathology and histopathology were used to evaluate the severity of tissue damage caused by virus infection.RESULTS:The results showed that the efficient infection method of RPV HN1201 was via intranasal inoculation at 107 TCID50,and that the virus has high pathogenicity to 35-to 127-d old pigs.Compared with Fa strain,pigs infected with HN1201 showed more severe clinical symptoms and pathological lesions.Immunochemistry results revealed HN1201 had more abundant antigen distribution in extensive organs.CONCLUSION:All of the above results suggest that PRV variant HN1201 was more pathogenic to pigs than the classical Fa strain.展开更多
Objective To testify the efficacy of ^18F-fluorodeoxyglucose （^18F-FDG） positron emission tomography （PET） in the diagnosis of cancer. Methods A total of 170 patients with diagnosed cancer or suspicious cancer wer...Objective To testify the efficacy of ^18F-fluorodeoxyglucose （^18F-FDG） positron emission tomography （PET） in the diagnosis of cancer. Methods A total of 170 patients with diagnosed cancer or suspicious cancer were enrolled in this study, and underwent ^18F-FDG PET. The standard uptake value （SUV） and diameter for each abnormal region in PET images were analyzed. All data were analyzed by SPSS 11.5. Results PET scan identified a primary cancer in 45.8% （11/24） patients. The sensitivity and specificity of PET scan in differentiating malignant lesions from benign ones were 78.8% （52/66） and 77.1% （27/35） respectively. Twenty-nine out of 68 （42.6%） lesions were detected earlier by PET than by computed tomography. The SHV of primary cancer was significantly higher than that of metastatic lymph nodes （5.84± 3.12 vs. 3.14± 2.24, P〈0.001）. And SLIV of primary lung cancer was also significantly higher than that of metastatic lung cancer （6.30±3.01 vs. 2.86±2.37, P〈0.01）.Conclusion ^18F-FDG PET plays a very important role in cancer diagnosis.展开更多
Recently,cylindrical structures have been exploited in various fields due to their excellent mechanical properties.With the increase in the application of cylindrical shell structures,researchers are paying more and m...Recently,cylindrical structures have been exploited in various fields due to their excellent mechanical properties.With the increase in the application of cylindrical shell structures,researchers are paying more and more attention to its acoustic performance and sound insulation applications.By inserting the pyramidal truss lattice into the cylindrical shell structure,a cylindrical sandwich structure is obtained and the sound insulation performance of the structure is investigated.The space-harmonic expansion method and the principle of virtual work are employed to establish a theoretical model for the acoustic analysis of cylindrical sandwich structures.The vibro-acoustic coupling is taken into account by imposing the velocity continuity condition at the fluid-solid interface.The sound transmission loss(STL)performance of the structure is examined by establishing both theoretical and finite element models.Subsequently,the influence of various parameters on sound transmission loss is researched and analyzed.展开更多
基金Supported by Major Science and Technology Program in Henan Province,No.131100110200
文摘AIM:To test the pathogenicity of pseudorabies virus(PRV)variant HN1201 and compare its pathogenicity with a classical PRV Fa strain.METHODS:The pathogenicity of the newly-emerging PRV variant HN1201 was evaluated by different inoculating routes,virus loads,and ages of pigs.The classical PRV Fa strain was then used to compare with HN1201 to determine pathogenicity.Clinical symptoms after virus infection were recorded daily and average daily body weight was used to measure the growth performance of pigs.At necropsy,gross pathology and histopathology were used to evaluate the severity of tissue damage caused by virus infection.RESULTS:The results showed that the efficient infection method of RPV HN1201 was via intranasal inoculation at 107 TCID50,and that the virus has high pathogenicity to 35-to 127-d old pigs.Compared with Fa strain,pigs infected with HN1201 showed more severe clinical symptoms and pathological lesions.Immunochemistry results revealed HN1201 had more abundant antigen distribution in extensive organs.CONCLUSION:All of the above results suggest that PRV variant HN1201 was more pathogenic to pigs than the classical Fa strain.
文摘Objective To testify the efficacy of ^18F-fluorodeoxyglucose （^18F-FDG） positron emission tomography （PET） in the diagnosis of cancer. Methods A total of 170 patients with diagnosed cancer or suspicious cancer were enrolled in this study, and underwent ^18F-FDG PET. The standard uptake value （SUV） and diameter for each abnormal region in PET images were analyzed. All data were analyzed by SPSS 11.5. Results PET scan identified a primary cancer in 45.8% （11/24） patients. The sensitivity and specificity of PET scan in differentiating malignant lesions from benign ones were 78.8% （52/66） and 77.1% （27/35） respectively. Twenty-nine out of 68 （42.6%） lesions were detected earlier by PET than by computed tomography. The SHV of primary cancer was significantly higher than that of metastatic lymph nodes （5.84± 3.12 vs. 3.14± 2.24, P〈0.001）. And SLIV of primary lung cancer was also significantly higher than that of metastatic lung cancer （6.30±3.01 vs. 2.86±2.37, P〈0.01）.Conclusion ^18F-FDG PET plays a very important role in cancer diagnosis.
基金The authors gratefully acknowledge the financial support from National Nature Science Foundation of China under Grant No.12072092.
文摘Recently,cylindrical structures have been exploited in various fields due to their excellent mechanical properties.With the increase in the application of cylindrical shell structures,researchers are paying more and more attention to its acoustic performance and sound insulation applications.By inserting the pyramidal truss lattice into the cylindrical shell structure,a cylindrical sandwich structure is obtained and the sound insulation performance of the structure is investigated.The space-harmonic expansion method and the principle of virtual work are employed to establish a theoretical model for the acoustic analysis of cylindrical sandwich structures.The vibro-acoustic coupling is taken into account by imposing the velocity continuity condition at the fluid-solid interface.The sound transmission loss(STL)performance of the structure is examined by establishing both theoretical and finite element models.Subsequently,the influence of various parameters on sound transmission loss is researched and analyzed.
