灯盏细辛中酚类化合物的化学研究

从灯盏细辛（Ｅｒｉｇｅｒｏｎ ｂｒｅｖｉｓｃａｐｕｓ（Ｖａｎ．）Ｈａｎｄ－Ｍａｚｚ）的乙酸乙酯部分首次分离得到５个二咖啡酰基的酚类化合物（１￣５）和９个其他类型化合物。其中ｅｒｉｇｏｓｔｅｒ Ａ（１）为一全新骨架的化合物。利用波谱方法（＾１Ｈ－ＮＭＲ,＾１３Ｃ－ＮＭＲ,２Ｄ－ＮＭＲ和ＦＡＢ－ＭＳ等）对这些化合物的结构进行了鉴定。     

南海柳珊瑚Isis sp.化学成分的研究

从中国南沙采集的柳珊瑚Ｉｓｉｓ ｓｐ。中分离出四个有机化合物,通过ＵＶ,ＩＲ,ＭＳ,＾１Ｈ－ＮＭＲ和＾１３Ｃ－ＮＭＲ分析以及化学转换的方法,确定了它们的结构分别为：Ｈｉｐｐｕｒｉｓｔａｎｏｌ（１）,Δ＾４．５（Ｅ）、Δ＾９．１０（Ｚ）－鞘氨醇－正十五碳酸酰胺（２）,胸腺嘧啶（３）和尿嘧啶（４）。其中化合物（２）为新结构的神经酰胺,被命名为Ｉｓｉｍａｍｉｄｅ,其它为已知化合物。     

番荔枝化学成分研究(7)

从番荔枝（Ａｎｎｏｎａ ｓｑｕａｍｏｓａ Ｌ．）种子中得到化合物１、２和４,化合物２和４分别为已知化合物ｍｏｔｒｉｌｉｎ（莫垂林,２）和ｂｕｌｌａｔａｎｏｃｉｎ（布拉他诺辛,４）。化合物１的化学结构经ＩＲ、ＭＳ、＾１Ｈ ＮＭＲ及＾１３Ｃ ＮＭＲ谱分析及其乙酰化物（１ａ）的ＭＳ、＾１Ｈ ＮＭＲ谱分析推定如（１）式并命名为２２－表－莫维查灵（２２－ｅｐｉ－ｍｏｌｖｉｚａｒｉｎ）。     

头序Song木化学成分研究

自头序Ｓｏｎｇ木７０％ＥｔＯＨ提取物分得６个化合物,应用光谱技术（ＩＲ,ＭＳ,ＨＮＭＲ,＾１３ＣＮＭＲ,ＤＥＰＴ,２ＤＮＭＲ）及化学方法,确定了他们的结构,分别为β－谷甾醇（Ⅰ）,胡萝卜甙（Ⅱ）,齐墩果酸（Ⅲ）,竹节参皂甙１（Ⅳ）,竹节参皂甙Ⅳａ（ＣｈｉｋｕｓｅｔｓｕｓａｐｏｍｉｎⅣａ）（Ⅴ）,常春藤皂甙元－２８－Ｏ－β－吡喃葡萄糖醛酸（１→４）－β－Ｄ－吡喃葡萄糖甙（Ⅵ）,以上化合物均为首次从该     

毛裂蜂斗菜化学成分的研究

从毛裂蜂斗菜（ｐｄｔａｓｉｌｅｘ ｔｒｉｃｈｏｌｏｂｕｓ Ｆｒａｎｃｈ。）的石油醚提取物中首次分离得到６个化合物,运用ＩＲ,ＥＩ－ＭＳ,ＨＲＭＳ,＾１Ｈ ＮＭＲ,＾１３Ｃ ＮＭＲ,ＤＥＰＴ等光谱方法确定了它们的结构。它们分别是：Ａ１－β－谷甾醇;Ａ２,三十二碳酸,Ａ３,羽扇豆醇;Ａ４,Ｂａｋｋｅｎｏｌｉｄｅ－Ｂ;Ａ５,Ｂａｋｋｅｎｏｌｉｄｅ－Ｄ和Ａ６,ａｋｋｅｎｏｌｉｄｅ－Ｅ。     

山西甘草化学成分的研究

本文报导了从山西甘草中分离出的八种化合物,经化学方法和光谱分析（ＵＶ,ＩＲ,ＭＳ,＾１ＨＮＭＲ和＾１３Ｃ ＮＭＲ）鉴定出其中六种化合物,１蔗糖（ｓｕｃｒｏｓｅ）,Ⅱ４’５,７－三羟革－８－异然基黄酮（４’,５,７－Ｔｒｉｔｈｙｄｒｏｘｙ－８－ｐｒｅｎｙｌ－ｆｌａｖｏｎｅ）;Ⅲ异芒柄花甙（Ｉｓｏｏｎｏｎｉｎ）,Ⅳ,４‘,７－二羟基黄酮（４’－７－Ｄｉｔｈｙｄｒｏｘｙｆｌａｖｏｎｅ）;Ⅳ（ｌｉｑｕｉｒ     

大萼香茶菜庚素的化学结构

从大萼香茶菜（Ｒａｂｄｏｓｉａ ｍ ａｃｒｏｃａｌｙｘ （Ｄｕｎｎ） Ｈａｒａ）叶的乙醇提取物中又分离到３ 个二萜成分（结晶Ⅰ、Ⅱ、Ⅲ）,通过ＩＲ、ＭＳ、１Ｈ－１Ｈ ＣＯＳＹ、１３Ｃ－１Ｈ ＣＯＳＹ和ＮＯＥ等光谱分析及衍生物的制备,确定结晶Ⅰ的结构为ｅｎｔ－７β－２０－ｅｐｏｘｙ－６α, ７α,１４α,１５α,１６α－ｐｅｎｔａｈｙｄｒｏｋａｕｒａｎｅ－１７－ａｃ－ｅｔａｔｅ,为新的二萜化合物,命名为大萼香茶菜庚素;结晶Ⅱ和Ⅲ为已知化合物ｒａｂｄｏｐｈｙｌｌｉｎ Ｈ和ｐｏｎｉｃｉｄｉｎ。     

长果升麻的化学成分研究

从长果升麻（Ｓｏｕｌｉｅａ ｖａｇｉｎａｔａ）根茎中分离出６种皂甙,经光谱（ＦＡＢ－ＭＳ、１Ｈ－ＮＭＲ、１Ｈ－１Ｈ－ＣＯＳＹ、１３Ｃ－ＮＭＲ、１Ｈ－１３Ｃ－ＣＯＳＹ）分析,分别鉴定为２７－ｄｅｏｘｙａｃｔｅｉｎ（１）,ａｃｔｅｉｎ（２）,２５－０－乙酰升麻醇木糖甙（３）,２５－甲基升麻醇木糖甙（４）,升麻醇木糖甙（５）,２４－ａｃｅｔｙｌｈｙｄｒｏｓｈｅｎｇｍａｎｏｌ ｘｙｌｏｓｉｄｅ（６）,其中     

朝鲜淫羊藿的化学成分（Ⅱ）

从朝鲜淫羊藿的地上部分分离到七个成分（Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ、Ⅶ）。经ＵＶ,ＩＲ,＾１Ｈ－ＮＭＲ,＾１３Ｃ－ＮＭＲ,ＭＳ及化学方法鉴定了它们的结构,分别是ｉｃａｒｉｔｉｎ－３－Ｏ－ａ－Ｌ－ｒｈａｍｎｏｐｙｒａｎｏｓｉｄｅ（Ⅰ）,ｓａｇｉｔｔａｔｏｓｉｄｅ Ａ（Ⅱ）,ｓａｇｉｔｔａｔｏｓｉｄｅ Ｂ（Ⅲ）,３,５,７－ｔｒｉｈｙｄｒｏｘｙｌ－４＾１－ｍｅｔｈｏｘｙ１－８－ｐｒｅｎｙ１－ｆｌａｖｏｎｅ－     

地涌金莲化学成分的研究

从地涌金莲（Ｍｕｓｅｌｌａ ｌａｓｉｏｃａｒｐａ（Ｆｒａｎｃｈ．）Ｃ．Ｙ．Ｗｕ．）新鲜植物中分离得到了５种化合物,经理化常数和ＩＲ,ＥＩ－ＭＷ、＾１Ｈ ＮＭＲ,＾１５ＣＮＭＲ波谱数据分析,分别鉴定为,正二十四烷（ｔｅｔｒａｃｏｓａｎｅ,１）,β－谷甾醇（β－ｓｉｔｏｓｔｅｒｏｌ,２）,硬脂酸（ｓｔｅｒａｒｉｅ ａｃｉｄ,３）２,４－二羟基苯甲酸（２,４－ｄｉｔｈｙｄｒｏｘｙ ｂｅｎｚｏｌｅ ａｃｉ     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.     

杆状病毒出芽病毒粒子膜融合蛋白的研究进展

杆状病毒是一类感染节肢动物的病原微生物,其基因组为双链环状DNA,大小为80～180kb.     

Inception of the Modern Public Health System in China and Perspectives for Effective Control of Emerging Infectious Diseases: In Commemoration of the 140th Anniversary of the Birth of the Plague Fighter Dr. Wu Lien-Teh

In this article, we systematically review Dr. Wu Lien-Teh's academic achievements and outstanding contributions in the prevention and control of the plague epidemic in northeast China and introduce the development of the earliest public health epidemic prevention system in China in order to commemorate the 140th anniversary of Dr. Wu Lien-Teh's birth. We hope that this article will provide insights into the effective prevention and control of emerging infectious diseases as well as the current worldwide pandemic of COVID-19, facilitating the improvement and development of public health systems in China and around the globe.