The agricultural land resources of China are relatively limited because of its large population.Therefore,balancing the land use for industrialization,urbanization,and food security is a big challenge.In recent years,...The agricultural land resources of China are relatively limited because of its large population.Therefore,balancing the land use for industrialization,urbanization,and food security is a big challenge.In recent years,rural hollowing in China has resulted in numerous of abandoned rural houses,and the areas with abandoned houses need to be restored into agricultural land with effective land consolidation techniques.This study used the method of benefit-cost analysis and the data collected through field surveys conducted in Yucheng City in the northwest of Shandong Province in March 2009,to examine how hollow villages (HVs) to be created and how to solve the problem.The qualitative and quantitative analyses indicate following results.1) The situation of HVs is becoming increasingly severe under rapid industrialization and urbanization in Yucheng City.2) Poor infrastructure in rural areas and incomplete urbanization are the main factors that have led to the rural hollowing in many major rural regions of China.3) In order to resolve the problem caused by HVs and increase agricultural land,reconstructing rural communities in the countryside is necessary.4) A new mechanism in the provision of compensation funds by developed regions to the villages in less-developed regions must be established.展开更多
To investigate the HLA-A, -B allele polymorphism in Han population of Shandong province and to explore the possibility to find out the HLA-A,-B-matehed cord blood donors for stem cell transplantation to be used in oth...To investigate the HLA-A, -B allele polymorphism in Han population of Shandong province and to explore the possibility to find out the HLA-A,-B-matehed cord blood donors for stem cell transplantation to be used in other area in China, 5844 umbilical cord blood samples were taken from Han population donors of Shandong province, and assayed with PCR-sequence-oligonucleotide （PCR-SSO） assay. In Shandong Hart donors, 20 alleles at HLA-A locus and 46 alleles at HLA-B locus could be detected as revealed in the present study. Among the 20 alleles at HLA-A locus, the most prevalent five alleles included A ＊ 02（0.3041）, A ＊ 11（0. 1443）, A ＊ 24（0. 1434）, A ＊ 30（0.0975） and A 33（0.0859）, while, the alleles with lower gene frequencies included A ＊ 34（0.0006）, A ＊ 25 （0.0005）, A ＊ 66（0.0005）, A ＊ 74（0.0004） and A ＊ （0.0001）. Of the 46 HLA-B alleles detected, the most prevalent five alleles were B ＊ 13（0.1348）, B ＊ 51（0.0713）, B ＊ 62（0.0712）, B ＊ 61 （0.0676） and B ＊ 60（0.0642）; while alleles with lower gene frequencies included B ＊ 77（0.0001）, B ＊ 76（0.0002）, B ＊ 47（0.0003）, B ＊ 42（0.0003） and B ＊ 72（0.0004）. In comparison with those of the other Han population in China, the HLA-A, -B gene frequencies in the umbilical cord blood of Shandong province possess unique distribution features among the investigated populations from various regions of the same race origin, and the differences in various regions of the same race were less than those among the different race. It is evident that the HLA-A,-B alleles of the umbilical cord blood taken in Shangdong province show high degree of polymorphism, and it might be part of those of Northem Han population in China. So, it is reasonable for patients of Northern Chinese to receive HLA class Ⅰ -match transplant of cord blood stem ceils for tissue and organ transplantation from Shangdong umbilical cord blood bank.展开更多
基金Under the auspices of Knowledge Innovation Programs of Chinese Academy of Sciences (No.KZCX2-EW-304)National Natural Science Foundation of China (No.40635029,40871257)
文摘The agricultural land resources of China are relatively limited because of its large population.Therefore,balancing the land use for industrialization,urbanization,and food security is a big challenge.In recent years,rural hollowing in China has resulted in numerous of abandoned rural houses,and the areas with abandoned houses need to be restored into agricultural land with effective land consolidation techniques.This study used the method of benefit-cost analysis and the data collected through field surveys conducted in Yucheng City in the northwest of Shandong Province in March 2009,to examine how hollow villages (HVs) to be created and how to solve the problem.The qualitative and quantitative analyses indicate following results.1) The situation of HVs is becoming increasingly severe under rapid industrialization and urbanization in Yucheng City.2) Poor infrastructure in rural areas and incomplete urbanization are the main factors that have led to the rural hollowing in many major rural regions of China.3) In order to resolve the problem caused by HVs and increase agricultural land,reconstructing rural communities in the countryside is necessary.4) A new mechanism in the provision of compensation funds by developed regions to the villages in less-developed regions must be established.
文摘To investigate the HLA-A, -B allele polymorphism in Han population of Shandong province and to explore the possibility to find out the HLA-A,-B-matehed cord blood donors for stem cell transplantation to be used in other area in China, 5844 umbilical cord blood samples were taken from Han population donors of Shandong province, and assayed with PCR-sequence-oligonucleotide （PCR-SSO） assay. In Shandong Hart donors, 20 alleles at HLA-A locus and 46 alleles at HLA-B locus could be detected as revealed in the present study. Among the 20 alleles at HLA-A locus, the most prevalent five alleles included A ＊ 02（0.3041）, A ＊ 11（0. 1443）, A ＊ 24（0. 1434）, A ＊ 30（0.0975） and A 33（0.0859）, while, the alleles with lower gene frequencies included A ＊ 34（0.0006）, A ＊ 25 （0.0005）, A ＊ 66（0.0005）, A ＊ 74（0.0004） and A ＊ （0.0001）. Of the 46 HLA-B alleles detected, the most prevalent five alleles were B ＊ 13（0.1348）, B ＊ 51（0.0713）, B ＊ 62（0.0712）, B ＊ 61 （0.0676） and B ＊ 60（0.0642）; while alleles with lower gene frequencies included B ＊ 77（0.0001）, B ＊ 76（0.0002）, B ＊ 47（0.0003）, B ＊ 42（0.0003） and B ＊ 72（0.0004）. In comparison with those of the other Han population in China, the HLA-A, -B gene frequencies in the umbilical cord blood of Shandong province possess unique distribution features among the investigated populations from various regions of the same race origin, and the differences in various regions of the same race were less than those among the different race. It is evident that the HLA-A,-B alleles of the umbilical cord blood taken in Shangdong province show high degree of polymorphism, and it might be part of those of Northem Han population in China. So, it is reasonable for patients of Northern Chinese to receive HLA class Ⅰ -match transplant of cord blood stem ceils for tissue and organ transplantation from Shangdong umbilical cord blood bank.
