目的研究口服75 g葡萄糖对正常孕妇和妊娠期糖尿病(GDM)孕妇血清总胆汁酸(TBA)水平的影响。方法取本院门诊行糖耐量试验的非妊娠期肝内胆汁淤积症(ICP)孕妇,排除影响空腹血清总胆汁酸(TBA)的相关疾病后,分别收集到正常孕妇和GDM孕妇130...目的研究口服75 g葡萄糖对正常孕妇和妊娠期糖尿病(GDM)孕妇血清总胆汁酸(TBA)水平的影响。方法取本院门诊行糖耐量试验的非妊娠期肝内胆汁淤积症(ICP)孕妇,排除影响空腹血清总胆汁酸(TBA)的相关疾病后,分别收集到正常孕妇和GDM孕妇130例和64例,对其空腹、服糖后1 h、服糖后2 h血标本进行TBA检测,采用单因素重复测量设计方差分析分别比较两组3个时间点TBA、独立样本t检验比较两组孕妇同一时间点TBA。结果正常孕妇组各时间点TBA水平之间差异无统计学意义;GDM组孕妇空腹TBA与2 h TBA差异无统计学意义,1 h TBA与空腹TBA和2 h TBA比较差异均有统计学意义(P<0.01)。结论对于正常孕妇和GDM孕妇,当某些情况不适合空腹而又需要测定TBA时,两者可以分别考虑口服<75 g的葡萄糖1 h后和2 h后进行再TBA测定。展开更多
Site-specific nutrient management is an important strategy to promote sustainable production of rubber trees in order to obtain high yields of natural rubber. Making effective nutrient management decisions for rubber ...Site-specific nutrient management is an important strategy to promote sustainable production of rubber trees in order to obtain high yields of natural rubber. Making effective nutrient management decisions for rubber trees depend on knowing the spatial variations of soil fertility properties in advance. In this study the Kriging geostatistical method was used to examine the spatial variability of soil total nitrogen(TN), organic matter(OM), available phosphorus(AP) and available potassium(AK) in a typical hilly rubber tree plantation in Hainan, China. The spatial variability of the soils was small for the TN and OM and had medium variability for the AP and AK variables. Anisotropic semivariograms of all soil properties revealed that elevation and building contour ledge can profoundly affect the spatial variability of soil properties in the plantation, except for the AK variable. Soil samples had to be collected in alignment with the direction of elevation and perpendicular to the direction of building contour ledges, which was needed to obtain more reliable information within the study area in the rubber tree plantation. In formulating a sample scheme for AK, the distribution features of the soil’s parent material should be considered as the influence factor in the study field. The Kriging method used to guide the soil sampling for spatial variability dertermination of soil properties was about 2-5 times more efficient than the classic statistical method.展开更多
文摘目的研究口服75 g葡萄糖对正常孕妇和妊娠期糖尿病(GDM)孕妇血清总胆汁酸(TBA)水平的影响。方法取本院门诊行糖耐量试验的非妊娠期肝内胆汁淤积症(ICP)孕妇,排除影响空腹血清总胆汁酸(TBA)的相关疾病后,分别收集到正常孕妇和GDM孕妇130例和64例,对其空腹、服糖后1 h、服糖后2 h血标本进行TBA检测,采用单因素重复测量设计方差分析分别比较两组3个时间点TBA、独立样本t检验比较两组孕妇同一时间点TBA。结果正常孕妇组各时间点TBA水平之间差异无统计学意义;GDM组孕妇空腹TBA与2 h TBA差异无统计学意义,1 h TBA与空腹TBA和2 h TBA比较差异均有统计学意义(P<0.01)。结论对于正常孕妇和GDM孕妇,当某些情况不适合空腹而又需要测定TBA时,两者可以分别考虑口服<75 g的葡萄糖1 h后和2 h后进行再TBA测定。
基金National Key Research and Development Program of China(2018YFD0201100)Foundation for China Agriculture Research System(CARS-34)Fundamental Scientific Research Funds for Chinese Academy of Tropical Agricultural Sciences(1630022017007)
文摘Site-specific nutrient management is an important strategy to promote sustainable production of rubber trees in order to obtain high yields of natural rubber. Making effective nutrient management decisions for rubber trees depend on knowing the spatial variations of soil fertility properties in advance. In this study the Kriging geostatistical method was used to examine the spatial variability of soil total nitrogen(TN), organic matter(OM), available phosphorus(AP) and available potassium(AK) in a typical hilly rubber tree plantation in Hainan, China. The spatial variability of the soils was small for the TN and OM and had medium variability for the AP and AK variables. Anisotropic semivariograms of all soil properties revealed that elevation and building contour ledge can profoundly affect the spatial variability of soil properties in the plantation, except for the AK variable. Soil samples had to be collected in alignment with the direction of elevation and perpendicular to the direction of building contour ledges, which was needed to obtain more reliable information within the study area in the rubber tree plantation. In formulating a sample scheme for AK, the distribution features of the soil’s parent material should be considered as the influence factor in the study field. The Kriging method used to guide the soil sampling for spatial variability dertermination of soil properties was about 2-5 times more efficient than the classic statistical method.
