针对目前介电弹性体材料的相关研究进展问题,运用信息可视化技术对近十年的相关文献进行了研究。以"dielectric elastomer"为主题词对Web of Science的SCI核心数据库进行了检索,利用CiteSpace信息可视化软件对数据进行了计量...针对目前介电弹性体材料的相关研究进展问题,运用信息可视化技术对近十年的相关文献进行了研究。以"dielectric elastomer"为主题词对Web of Science的SCI核心数据库进行了检索,利用CiteSpace信息可视化软件对数据进行了计量分析,对介电弹性体文献-共引网络图谱和文献-突现词共引混合图谱进行了绘制,对介电弹性体研究演进进行了梳理,对介电弹性体研究的前沿热点进行了归纳。归纳结果表明:介电弹性体材料领域正处于大发展时期,中美两国在该领域的科研投入较多,得到了3篇有显著影响力的关键节点文献,对介电弹性体材料在组成、性能和方法这3个方面的研究具有重要的意义。展开更多
Brassica napus L.(B.napus)is an important oil crop worldwide and it rapidly accumulates oil at late stage of seed maturation.However,little is known about the cellular mechanism of oil accumulation and seed color chan...Brassica napus L.(B.napus)is an important oil crop worldwide and it rapidly accumulates oil at late stage of seed maturation.However,little is known about the cellular mechanism of oil accumulation and seed color changes during the late stage of rapeseed development.Here,we analyzed the ultrastructure of seed coat,aleurone and cotyledon in embryos of B.napus from 25 to 70 days after flowering(DAF).The pigments,which were deposited on the cell wall of palisade cells in seed coat,determined dark black color of rapeseed.The chloroplasts degenerated into non-photosynthetic plastids which caused the green cotyledon to turn into yellow.The chloroplasts in aleurone and cotyledon cells respectively degenerated into remnants without inner and outer envelope membranes and ecoplasts with intact inner and outer envelope membranes.From 40 to 70 DAF,there were degraded chloroplasts without thylakoid,oil bodies contacting with plastids or protein bodies,big starch deposits of chloroplasts degrading into small particles then disappearing,and small endoplasmic reticulum(ER)in aleurone and cotyledon cells.Additionally,there were decreases of chlorophyll content and dramatic increases of oil content in rapeseed.These results suggested that the rapid oil accumulation was independent on the NADPH synthesized by photosynthesis of chloroplasts and probably utilized other sources of reductant,such as the oxidative pentose phosphate pathway during the late stage of rapeseed development.The triacylglycerol assembly presumably utilizes the enzymes in the plastid,cytosol or oil body of cotyledon and aleurone cells.展开更多
文摘针对目前介电弹性体材料的相关研究进展问题,运用信息可视化技术对近十年的相关文献进行了研究。以"dielectric elastomer"为主题词对Web of Science的SCI核心数据库进行了检索,利用CiteSpace信息可视化软件对数据进行了计量分析,对介电弹性体文献-共引网络图谱和文献-突现词共引混合图谱进行了绘制,对介电弹性体研究演进进行了梳理,对介电弹性体研究的前沿热点进行了归纳。归纳结果表明:介电弹性体材料领域正处于大发展时期,中美两国在该领域的科研投入较多,得到了3篇有显著影响力的关键节点文献,对介电弹性体材料在组成、性能和方法这3个方面的研究具有重要的意义。
基金the National Natural Science Foundations of China(41877528,41471432 and 31500977)。
文摘Brassica napus L.(B.napus)is an important oil crop worldwide and it rapidly accumulates oil at late stage of seed maturation.However,little is known about the cellular mechanism of oil accumulation and seed color changes during the late stage of rapeseed development.Here,we analyzed the ultrastructure of seed coat,aleurone and cotyledon in embryos of B.napus from 25 to 70 days after flowering(DAF).The pigments,which were deposited on the cell wall of palisade cells in seed coat,determined dark black color of rapeseed.The chloroplasts degenerated into non-photosynthetic plastids which caused the green cotyledon to turn into yellow.The chloroplasts in aleurone and cotyledon cells respectively degenerated into remnants without inner and outer envelope membranes and ecoplasts with intact inner and outer envelope membranes.From 40 to 70 DAF,there were degraded chloroplasts without thylakoid,oil bodies contacting with plastids or protein bodies,big starch deposits of chloroplasts degrading into small particles then disappearing,and small endoplasmic reticulum(ER)in aleurone and cotyledon cells.Additionally,there were decreases of chlorophyll content and dramatic increases of oil content in rapeseed.These results suggested that the rapid oil accumulation was independent on the NADPH synthesized by photosynthesis of chloroplasts and probably utilized other sources of reductant,such as the oxidative pentose phosphate pathway during the late stage of rapeseed development.The triacylglycerol assembly presumably utilizes the enzymes in the plastid,cytosol or oil body of cotyledon and aleurone cells.
