Understanding the composition and contents of carotenoids in various soybean seed accessions is important for their nutritional assessment.This study investigated the variability in the concentrations of carotenoids a...Understanding the composition and contents of carotenoids in various soybean seed accessions is important for their nutritional assessment.This study investigated the variability in the concentrations of carotenoids and chlorophylls and revealed their associations with other nutritional quality traits in a genetically diverse set of Chinese soybean accessions comprised of cultivars and landraces.Genotype,planting year,accession type,seed cotyledon color,and ecoregion of origin significantly influenced the accumulation of carotenoids and chlorophylls.The mean total carotenoid content was in the range of 8.15–14.72μg g–1 across the ecoregions.The total carotenoid content was 1.2-fold higher in the landraces than in the cultivars.Soybeans with green cotyledons had higher contents of carotenoids and chlorophylls than those with yellow cotyledons.Remarkably,lutein was the most abundant carotenoid in all the germplasms,ranging from 1.35–37.44μg g–1.Carotenoids and chlorophylls showed significant correlations with other quality traits,which will help to set breeding strategies for enhancing soybean carotenoids without affecting the other components.Collectively,our results demonstrate that carotenoids are adequately accumulated in soybean seeds,however,they are strongly influenced by genetic factors,accession type,and germplasm origin.We identified novel germplasms with the highest total carotenoid contents across the various ecoregions of China that could serve as the genetic materials for soybean carotenoid breeding programs,and thereby as the raw materials for food sectors,pharmaceuticals,and the cosmetic industry.展开更多
The present study attempted to evaluate the influence of human activity on major elements （Na2O, MgO, A1203, SiO2, K2O, CaO, Fe203）, and to find a method to explore correlations between major elements and human dist...The present study attempted to evaluate the influence of human activity on major elements （Na2O, MgO, A1203, SiO2, K2O, CaO, Fe203）, and to find a method to explore correlations between major elements and human disturbances, according to geospatial theories and methods. The study results indicate that landscapes influence major elements in diverse ways： Al2O3 is closely related to road and mine landscapes; strong relationships exist between MgO, Fe2O3, CaO, and SiO2 and roads; Na2O, SiO2, and Fe2O3 are unrelated to city landscapes; and Na2O is unrelated to road and mine landscapes.展开更多
针对配电网设备数量巨大、分布广阔,配电地理信息系统(geographic information system,GIS)具有空间数据和属性信息量大的特点,综合考虑C/S模式在交互性、响应速度和B/S模式在开放性、扩展性、信息浏览及发布方面的优势,设计开发了基于...针对配电网设备数量巨大、分布广阔,配电地理信息系统(geographic information system,GIS)具有空间数据和属性信息量大的特点,综合考虑C/S模式在交互性、响应速度和B/S模式在开放性、扩展性、信息浏览及发布方面的优势,设计开发了基于C/S与B/S混合架构的配电GIS,论述了配电GIS的系统架构、数据模型、系统功能及实现。该系统通过在某供电公司试运行,提高了工作效率和配电生产的现代化管理水平。展开更多
Background:The nest flea index of Meriones unguiculatus is a critical indicator for the prevention and control of plague,which can be used not only to detect the spatial and temporal distributions of Meriones unguicul...Background:The nest flea index of Meriones unguiculatus is a critical indicator for the prevention and control of plague,which can be used not only to detect the spatial and temporal distributions of Meriones unguiculatus,but also to reveal its cluster rule.This research detected the temporal and spatial distribution characteristics of the plague natural foci of Mongolian gerbils by body flea index from 2005 to 2014,in order to predict plague outbreaks.Methods:Global spatial autocorrelation was used to describe the entire spatial distribution pattern of the body flea index in the natural plague foci of typical Chinese Mongolian gerbils.Cluster and outlier analysis and hot spot analysis were also used to detect the intensity of clusters based on geographic information system methods.The quantity of M.unguiculatus nest fleas in the sentinel surveillance sites from 2005 to 2014 and host density data of the study area from 2005 to 2010 used in this study were provided by Chinese Center for Disease Control and Prevention.Results:The epidemic focus regions of the Mongolian gerbils remain the same as the hot spot regions relating to the body flea index.High clustering areas possess a similar pattern as the distribution pattern of the body flea index indicating that the transmission risk of plague is relatively high.In terms of time series,the area of the epidemic focus gradually increased from 2005 to 2007,declined rapidly in 2008 and 2009,and then decreased slowly and began trending towards stability from 2009 to 2014.For the spatial change,the epidemic focus regions began moving northward from the southwest epidemic focus of the Mongolian gerbils from 2005 to 2007,and then moved from north to south in 2007 and 2008.Conclusions:The body flea index of Chinese gerbil foci reveals significant spatial and temporal aggregation characteristics through the employing of spatial autocorrelation.The diversity of temporary and spatial distribution is mainly affected by seasonal variation,the human activity and natural factors.展开更多
围绕河北省全员人口数据库,开展了分布式人口地理信息系统的构建研究.研究表明,人口地理信息系统需同时面对数据生产者和数据消费者,必须采用B/S和C/S混合架构模式.在系统的C/S架构部分,直接使用成熟的GIS桌面系统,既满足了人口地理数...围绕河北省全员人口数据库,开展了分布式人口地理信息系统的构建研究.研究表明,人口地理信息系统需同时面对数据生产者和数据消费者,必须采用B/S和C/S混合架构模式.在系统的C/S架构部分,直接使用成熟的GIS桌面系统,既满足了人口地理数据生产,也减轻了系统开发强度和难度,同时保证能及时开展各种复杂空间分析,及时进行成果发布;在系统的B/S架构部分,使用Flex语言,基于Rest接口,利用ArcGIS For Flex API函数,开发了WebGIS程序,解决了客户端浏览器兼容性问题,满足了用户对人口地理数据的消费行为.系统与全员人口数据库融合,突破了对人口普查和统计年鉴的刚性依赖,提高了人口个案信息和统计信息的时效性;系统与各厅局专题数据融合,拓展了人口宏观决策参与范围.实践证明,分布式人口地理信息系统已成为人口地理研究产、学、研一体化的工作平台,分布式是人口地理信息系统步入社会化驱动阶段的必由之路.展开更多
基金financially supported by the National Natural Science Foundation of China(32161143033 and 32001574)the Agricultural Science and Technology Innovation Program of CAAS(2060203-2).
文摘Understanding the composition and contents of carotenoids in various soybean seed accessions is important for their nutritional assessment.This study investigated the variability in the concentrations of carotenoids and chlorophylls and revealed their associations with other nutritional quality traits in a genetically diverse set of Chinese soybean accessions comprised of cultivars and landraces.Genotype,planting year,accession type,seed cotyledon color,and ecoregion of origin significantly influenced the accumulation of carotenoids and chlorophylls.The mean total carotenoid content was in the range of 8.15–14.72μg g–1 across the ecoregions.The total carotenoid content was 1.2-fold higher in the landraces than in the cultivars.Soybeans with green cotyledons had higher contents of carotenoids and chlorophylls than those with yellow cotyledons.Remarkably,lutein was the most abundant carotenoid in all the germplasms,ranging from 1.35–37.44μg g–1.Carotenoids and chlorophylls showed significant correlations with other quality traits,which will help to set breeding strategies for enhancing soybean carotenoids without affecting the other components.Collectively,our results demonstrate that carotenoids are adequately accumulated in soybean seeds,however,they are strongly influenced by genetic factors,accession type,and germplasm origin.We identified novel germplasms with the highest total carotenoid contents across the various ecoregions of China that could serve as the genetic materials for soybean carotenoid breeding programs,and thereby as the raw materials for food sectors,pharmaceuticals,and the cosmetic industry.
基金supported by the Youth Science Foundation (Grant Nos. 41101174 and 41301094)the Lead Strategic Project of the Chinese Academy of Sciences (Grant No. XDB03030507)+1 种基金the Hundred Young Talents Program of the Institute of Mountain Hazards and Environment (Grant No. SDSQB-2015-02)the Open Fund for Key Laboratory of Geoscience Spatial Information Technology of Ministry of Land and Resources (Grant No. KLGSIT2016-01)
文摘The present study attempted to evaluate the influence of human activity on major elements （Na2O, MgO, A1203, SiO2, K2O, CaO, Fe203）, and to find a method to explore correlations between major elements and human disturbances, according to geospatial theories and methods. The study results indicate that landscapes influence major elements in diverse ways： Al2O3 is closely related to road and mine landscapes; strong relationships exist between MgO, Fe2O3, CaO, and SiO2 and roads; Na2O, SiO2, and Fe2O3 are unrelated to city landscapes; and Na2O is unrelated to road and mine landscapes.
文摘针对配电网设备数量巨大、分布广阔,配电地理信息系统(geographic information system,GIS)具有空间数据和属性信息量大的特点,综合考虑C/S模式在交互性、响应速度和B/S模式在开放性、扩展性、信息浏览及发布方面的优势,设计开发了基于C/S与B/S混合架构的配电GIS,论述了配电GIS的系统架构、数据模型、系统功能及实现。该系统通过在某供电公司试运行,提高了工作效率和配电生产的现代化管理水平。
基金The research was supported by the Innovation Project of State Key Laboratory of Resources and Environment Information System(Grant No.088RA90BYA)the Ministry of Science and Technology of China(Grant No.2016YFC1201301).
文摘Background:The nest flea index of Meriones unguiculatus is a critical indicator for the prevention and control of plague,which can be used not only to detect the spatial and temporal distributions of Meriones unguiculatus,but also to reveal its cluster rule.This research detected the temporal and spatial distribution characteristics of the plague natural foci of Mongolian gerbils by body flea index from 2005 to 2014,in order to predict plague outbreaks.Methods:Global spatial autocorrelation was used to describe the entire spatial distribution pattern of the body flea index in the natural plague foci of typical Chinese Mongolian gerbils.Cluster and outlier analysis and hot spot analysis were also used to detect the intensity of clusters based on geographic information system methods.The quantity of M.unguiculatus nest fleas in the sentinel surveillance sites from 2005 to 2014 and host density data of the study area from 2005 to 2010 used in this study were provided by Chinese Center for Disease Control and Prevention.Results:The epidemic focus regions of the Mongolian gerbils remain the same as the hot spot regions relating to the body flea index.High clustering areas possess a similar pattern as the distribution pattern of the body flea index indicating that the transmission risk of plague is relatively high.In terms of time series,the area of the epidemic focus gradually increased from 2005 to 2007,declined rapidly in 2008 and 2009,and then decreased slowly and began trending towards stability from 2009 to 2014.For the spatial change,the epidemic focus regions began moving northward from the southwest epidemic focus of the Mongolian gerbils from 2005 to 2007,and then moved from north to south in 2007 and 2008.Conclusions:The body flea index of Chinese gerbil foci reveals significant spatial and temporal aggregation characteristics through the employing of spatial autocorrelation.The diversity of temporary and spatial distribution is mainly affected by seasonal variation,the human activity and natural factors.
文摘围绕河北省全员人口数据库,开展了分布式人口地理信息系统的构建研究.研究表明,人口地理信息系统需同时面对数据生产者和数据消费者,必须采用B/S和C/S混合架构模式.在系统的C/S架构部分,直接使用成熟的GIS桌面系统,既满足了人口地理数据生产,也减轻了系统开发强度和难度,同时保证能及时开展各种复杂空间分析,及时进行成果发布;在系统的B/S架构部分,使用Flex语言,基于Rest接口,利用ArcGIS For Flex API函数,开发了WebGIS程序,解决了客户端浏览器兼容性问题,满足了用户对人口地理数据的消费行为.系统与全员人口数据库融合,突破了对人口普查和统计年鉴的刚性依赖,提高了人口个案信息和统计信息的时效性;系统与各厅局专题数据融合,拓展了人口宏观决策参与范围.实践证明,分布式人口地理信息系统已成为人口地理研究产、学、研一体化的工作平台,分布式是人口地理信息系统步入社会化驱动阶段的必由之路.
