Fossil cytoplasm is a new research topic of interest in paleobotany. Atomic force microscope （AFM） is a new technology applied widely in physics and biology; however, it is rarely used in paleontology. Here we appli...Fossil cytoplasm is a new research topic of interest in paleobotany. Atomic force microscope （AFM） is a new technology applied widely in physics and biology; however, it is rarely used in paleontology. Here we applied AFM for the first time to study fossil cytoplasm. The results indicate that the fossil cytoplasm is heterogeneous and full of ultrastructures, just like extant cytoplasm, and that the application of AFM, especially in combination with other techniques, can reveal the subcellular details of fossil plants with more confidence.展开更多
近年来,基于细胞核雄性不育系构建的种子生产技术(seed production technology,SPT)在水稻、玉米等作物中发展迅速,为作物杂种优势利用提供了新途径和新思路。本文综述了当前大豆细胞核雄性不育研究领域取得的一些进展,主要包括已发现...近年来,基于细胞核雄性不育系构建的种子生产技术(seed production technology,SPT)在水稻、玉米等作物中发展迅速,为作物杂种优势利用提供了新途径和新思路。本文综述了当前大豆细胞核雄性不育研究领域取得的一些进展,主要包括已发现的大豆细胞核雄性不育材料、大豆不育性状的细胞学发生机制、相关基因的定位及其分子作用机理等内容,总结了细胞核雄性不育系在大豆育种中的应用现状和潜能,为进一步开展大豆细胞核雄性不育研究及开发大豆杂种优势利用新技术提供了参考。展开更多
OBJECTIVE:To investigate the effectiveness and safety of Jiawei Xiaoyao pill(加味逍遥丸,JXP)in the treatment of symptoms associated with premenstrual syndrome(PMS).METHODS:A total of 144 regularly menstruating women w...OBJECTIVE:To investigate the effectiveness and safety of Jiawei Xiaoyao pill(加味逍遥丸,JXP)in the treatment of symptoms associated with premenstrual syndrome(PMS).METHODS:A total of 144 regularly menstruating women with PMS were recruited at 8 sites in China from August 2017 to December 2018,and randomized to receive either a JXP or a matching placebo(12 g/d,6 g twice a day)for 3 menstrual cycles.The primary indicator was the reduced Daily Record of Severity of Problems(DRSP)scores in the luteal phase after 3 months of treatment.The safety outcomes included clinical adverse events(AEs),adverse reactions(ARs),changes in vital signs,and laboratory tests.RESULTS:JXP surpassed the placebo in reducing DRSP scores(psychological/somatic dysfunction)in the luteal phase over 3 menstrual cycles of treatment(PFAS=0.002,PPPS=0.001).Additionally,there were no significant differences in the incidence of AEs,severe AEs,withdrawal due to AEs and ARs between the two groups(all P>0.05),and no clinically significant adverse medical events related to the test drug observed.CONCLUSIONS:JXP was superior to the placebo in relieving the symptoms associated with PMS,which signified that JXP may be effective,safe,and welltolerated as an alternative therapy.展开更多
基金supported by National Centre for NanoScience and Technology(China),Jiangsu Planned Project for Postdoctoral Research Funds,K.C.Wong Postdoctoral Fellowships,China Postdoctoral Science Foundation(No.2005037746)State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology,CAS),NSFC Program(Nos.40772006,40372008,40632010 and J0630967)
文摘Fossil cytoplasm is a new research topic of interest in paleobotany. Atomic force microscope （AFM） is a new technology applied widely in physics and biology; however, it is rarely used in paleontology. Here we applied AFM for the first time to study fossil cytoplasm. The results indicate that the fossil cytoplasm is heterogeneous and full of ultrastructures, just like extant cytoplasm, and that the application of AFM, especially in combination with other techniques, can reveal the subcellular details of fossil plants with more confidence.
文摘近年来,基于细胞核雄性不育系构建的种子生产技术(seed production technology,SPT)在水稻、玉米等作物中发展迅速,为作物杂种优势利用提供了新途径和新思路。本文综述了当前大豆细胞核雄性不育研究领域取得的一些进展,主要包括已发现的大豆细胞核雄性不育材料、大豆不育性状的细胞学发生机制、相关基因的定位及其分子作用机理等内容,总结了细胞核雄性不育系在大豆育种中的应用现状和潜能,为进一步开展大豆细胞核雄性不育研究及开发大豆杂种优势利用新技术提供了参考。
文摘OBJECTIVE:To investigate the effectiveness and safety of Jiawei Xiaoyao pill(加味逍遥丸,JXP)in the treatment of symptoms associated with premenstrual syndrome(PMS).METHODS:A total of 144 regularly menstruating women with PMS were recruited at 8 sites in China from August 2017 to December 2018,and randomized to receive either a JXP or a matching placebo(12 g/d,6 g twice a day)for 3 menstrual cycles.The primary indicator was the reduced Daily Record of Severity of Problems(DRSP)scores in the luteal phase after 3 months of treatment.The safety outcomes included clinical adverse events(AEs),adverse reactions(ARs),changes in vital signs,and laboratory tests.RESULTS:JXP surpassed the placebo in reducing DRSP scores(psychological/somatic dysfunction)in the luteal phase over 3 menstrual cycles of treatment(PFAS=0.002,PPPS=0.001).Additionally,there were no significant differences in the incidence of AEs,severe AEs,withdrawal due to AEs and ARs between the two groups(all P>0.05),and no clinically significant adverse medical events related to the test drug observed.CONCLUSIONS:JXP was superior to the placebo in relieving the symptoms associated with PMS,which signified that JXP may be effective,safe,and welltolerated as an alternative therapy.
