In order to screen suitable high hybrid wheat seed production technology,the split-plot experiment design was adopted and study was carried out about the effects of the different row ratios of male and female parents ...In order to screen suitable high hybrid wheat seed production technology,the split-plot experiment design was adopted and study was carried out about the effects of the different row ratios of male and female parents and application amount of nitrogen fertilizer on hybrid wheat seed production and its component factors. The results showed that the seed production increased with the increase in the number of female parent row. When the row ratio of male and female parents was 2 ∶ 6,the seed production was 3 683. 8 kg/ha; when the application amount of nitrogen fertilization was 50 kg/ha,the seed production was 3 649. 4 kg/ha; the interaction between the row ratio of male and female parents and the application amount of nitrogen fertilizer indicated that when the row ratio of male and female parents was 2∶ 6 and the application amount of nitrogen fertilizer was 300 kg/ha,the seed production reached the highest( 4160. 6 kg/ha). The row ratio of male and female parents and application amount of nitrogen fertilizer had significant effect on the component factors of seed production,including the number of grains per spike,spike weight and setting percentage. When the row ratio of male and female parents was 2∶ 5,the number of grains per spike,spike weight and setting percentage were the highest at 26. 7 grains,1. 12 g,and 62. 6% respectively; when application amount of nitrogen fertilizer was 450 kg/ha,the number of grains per spike,spike weight and setting percentage were the highest at 26. 0 grains,1. 08 g,and59. 2% respectively; the interaction of row ratio of male and female parents and application amount of nitrogen fertilizer had significant effect on the number of grains per spike,spike weight and setting percentage; when the row ratio of male and female parents was 2∶ 5 and the application amount of nitrogen fertilizer was 300 kg/ha,the number of grains per spike,spike weight and setting percentage were the highest at 29. 6grains,1. 24 g,and 71. 6% respectively. The number of grains per spike is the largest component factor for seed production. Increasing the number of grains per spike can increase the seed production. According to the effects of row ratio of male and female parents and application amount of nitrogen fertilizer on the component factors of seed production,the optimal condition was 2∶ 5-2∶ 6 for row ratio of male and female parents and 300-450 kg/ha for application amount of nitrogen fertilizer.展开更多
The aim of this study is to assess if there is a significant difference between crown to root ratio of male and female permanent teeth in Chinese people in Shanghai.Methods: For this purpose one thousand four hundred ...The aim of this study is to assess if there is a significant difference between crown to root ratio of male and female permanent teeth in Chinese people in Shanghai.Methods: For this purpose one thousand four hundred (700,male and 700,female) extracted teeth were collected between age 25-35 and the crown length (CL) and root length (RL) of permanent teeth were measured by a precise caliper.Statistical analyses were performed with the SPSS 17 software by Student's t-test method.Results: The mean crown length of permanent teeth of male was found to be larger than that of female except for maxillary central incisor and the mean root length of male was found to be comparatively larger than that of female.Conclusion: There was a significant difference in root to crown ratio (RL/CL) between male maxillary teeth and mandibular teeth and female ones.The RL/CL ratio of male tends to be larger than those of female in Shanghai population.展开更多
目的:探讨aMAP(age-male-ALBI-platelet,aMAP)、天门冬氨酸氨基转移酶/血小板比率指数(aspartate aminotransferase-to-platelet ratio index,APRI)、基于4因子的肝纤维化指数(fibrosis index based on the 4 factors,FIB-4)及肝硬度值(...目的:探讨aMAP(age-male-ALBI-platelet,aMAP)、天门冬氨酸氨基转移酶/血小板比率指数(aspartate aminotransferase-to-platelet ratio index,APRI)、基于4因子的肝纤维化指数(fibrosis index based on the 4 factors,FIB-4)及肝硬度值(liver stiffness measurement,LSM)评估乙型肝炎(乙肝)肝硬化患者食管胃静脉曲张(esophageal gastric varices,EGV)程度的价值。方法:选取2018年4月到2022年5月期间在上海交通大学医学院附属瑞金医院确诊并接受治疗的乙肝肝硬化患者114例,对其进行肝功能、血常规、LSM、胃镜等检查,根据计算公式计算aMAP、APRI、FIB-4。根据胃镜结果将患者分为无EGV组(39例)、轻度EGV组(30例)、中度EGV组(23例)及重度EGV组(22例),比较4组间的aMAP、APRI、FIB-4。采用受试者操作特征曲线(receiver operator characteristic curve,ROC曲线)分析aMAP、APRI、FIB-4及LSM评估乙肝肝硬化患者EGV程度的价值。结果:EGV患者(包括轻度、中度及重度EGV组)的aMAP、APRI、FIB-4、LSM均显著高于无EGV的患者,差异有统计学意义(P<0.05)。轻度、中度及重度EGV组间的aMAP、APRI、FIB-4差异均有统计学意义(P<0.05);轻度EGV组与中度、重度EGV组间LSM差异有统计学意义(P<0.05)。aMAP评估EGV程度的ROC曲线下面积(the area under ROC curve,AUROC)为0.76,灵敏度为85.9%,特异度为65.7%;APRI、FIB-4和LSM评估EGV程度的AUROC分别为0.86、0.85、0.79,灵敏度分别为81.30%、82.80%、88.40%,特异度分别为82.90%、77.10%、66.80%。aMAP、APRI、FIB-4和LSM对肝硬化患者是否合并EGV有较好诊断价值(P<0.05)。aMAP、APRI、FIB-4对乙肝肝硬化患者的EGV程度有一定诊断价值(P<0.05),但特异度较低。结论:aMAP、APRI、FIB-4及LSM诊断乙肝肝硬化患者伴EGV的价值较高,而aMAP、APRI及FIB-4对其EGV程度有一定评估价值,可作为不适合做胃镜患者评估EGV的补充参考,为EGV的预防及治疗提供依据。展开更多
基金Supported by State Key Research and Development Program of Ministry of Science and Technology(2016YFD0101603)Fundamental Research Funds for the Central Universities in 2016(XDJK2016A020)
文摘In order to screen suitable high hybrid wheat seed production technology,the split-plot experiment design was adopted and study was carried out about the effects of the different row ratios of male and female parents and application amount of nitrogen fertilizer on hybrid wheat seed production and its component factors. The results showed that the seed production increased with the increase in the number of female parent row. When the row ratio of male and female parents was 2 ∶ 6,the seed production was 3 683. 8 kg/ha; when the application amount of nitrogen fertilization was 50 kg/ha,the seed production was 3 649. 4 kg/ha; the interaction between the row ratio of male and female parents and the application amount of nitrogen fertilizer indicated that when the row ratio of male and female parents was 2∶ 6 and the application amount of nitrogen fertilizer was 300 kg/ha,the seed production reached the highest( 4160. 6 kg/ha). The row ratio of male and female parents and application amount of nitrogen fertilizer had significant effect on the component factors of seed production,including the number of grains per spike,spike weight and setting percentage. When the row ratio of male and female parents was 2∶ 5,the number of grains per spike,spike weight and setting percentage were the highest at 26. 7 grains,1. 12 g,and 62. 6% respectively; when application amount of nitrogen fertilizer was 450 kg/ha,the number of grains per spike,spike weight and setting percentage were the highest at 26. 0 grains,1. 08 g,and59. 2% respectively; the interaction of row ratio of male and female parents and application amount of nitrogen fertilizer had significant effect on the number of grains per spike,spike weight and setting percentage; when the row ratio of male and female parents was 2∶ 5 and the application amount of nitrogen fertilizer was 300 kg/ha,the number of grains per spike,spike weight and setting percentage were the highest at 29. 6grains,1. 24 g,and 71. 6% respectively. The number of grains per spike is the largest component factor for seed production. Increasing the number of grains per spike can increase the seed production. According to the effects of row ratio of male and female parents and application amount of nitrogen fertilizer on the component factors of seed production,the optimal condition was 2∶ 5-2∶ 6 for row ratio of male and female parents and 300-450 kg/ha for application amount of nitrogen fertilizer.
文摘The aim of this study is to assess if there is a significant difference between crown to root ratio of male and female permanent teeth in Chinese people in Shanghai.Methods: For this purpose one thousand four hundred (700,male and 700,female) extracted teeth were collected between age 25-35 and the crown length (CL) and root length (RL) of permanent teeth were measured by a precise caliper.Statistical analyses were performed with the SPSS 17 software by Student's t-test method.Results: The mean crown length of permanent teeth of male was found to be larger than that of female except for maxillary central incisor and the mean root length of male was found to be comparatively larger than that of female.Conclusion: There was a significant difference in root to crown ratio (RL/CL) between male maxillary teeth and mandibular teeth and female ones.The RL/CL ratio of male tends to be larger than those of female in Shanghai population.
文摘目的:探讨aMAP(age-male-ALBI-platelet,aMAP)、天门冬氨酸氨基转移酶/血小板比率指数(aspartate aminotransferase-to-platelet ratio index,APRI)、基于4因子的肝纤维化指数(fibrosis index based on the 4 factors,FIB-4)及肝硬度值(liver stiffness measurement,LSM)评估乙型肝炎(乙肝)肝硬化患者食管胃静脉曲张(esophageal gastric varices,EGV)程度的价值。方法:选取2018年4月到2022年5月期间在上海交通大学医学院附属瑞金医院确诊并接受治疗的乙肝肝硬化患者114例,对其进行肝功能、血常规、LSM、胃镜等检查,根据计算公式计算aMAP、APRI、FIB-4。根据胃镜结果将患者分为无EGV组(39例)、轻度EGV组(30例)、中度EGV组(23例)及重度EGV组(22例),比较4组间的aMAP、APRI、FIB-4。采用受试者操作特征曲线(receiver operator characteristic curve,ROC曲线)分析aMAP、APRI、FIB-4及LSM评估乙肝肝硬化患者EGV程度的价值。结果:EGV患者(包括轻度、中度及重度EGV组)的aMAP、APRI、FIB-4、LSM均显著高于无EGV的患者,差异有统计学意义(P<0.05)。轻度、中度及重度EGV组间的aMAP、APRI、FIB-4差异均有统计学意义(P<0.05);轻度EGV组与中度、重度EGV组间LSM差异有统计学意义(P<0.05)。aMAP评估EGV程度的ROC曲线下面积(the area under ROC curve,AUROC)为0.76,灵敏度为85.9%,特异度为65.7%;APRI、FIB-4和LSM评估EGV程度的AUROC分别为0.86、0.85、0.79,灵敏度分别为81.30%、82.80%、88.40%,特异度分别为82.90%、77.10%、66.80%。aMAP、APRI、FIB-4和LSM对肝硬化患者是否合并EGV有较好诊断价值(P<0.05)。aMAP、APRI、FIB-4对乙肝肝硬化患者的EGV程度有一定诊断价值(P<0.05),但特异度较低。结论:aMAP、APRI、FIB-4及LSM诊断乙肝肝硬化患者伴EGV的价值较高,而aMAP、APRI及FIB-4对其EGV程度有一定评估价值,可作为不适合做胃镜患者评估EGV的补充参考,为EGV的预防及治疗提供依据。
