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Novel Diterpenoids and Sesquiterpenoids from Siegesbeckia orientalis

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Novel Diterpenoids and Sesquiterpenoids from Siegesbeckia or...

The 3.(rd) International Conference on Natural Products :Natural Products -a Must for Human Survival ABSTRACTS

作者： Ying Xiang, Hua Zhang, Chengqi Fan, and Jianmin Yue State Key Laboratory of Drug Research, institute of Materia Medica, Shanghai institutes for Biological {2., Chinese {3. of {2., 5.5.Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 2.12.3. P. R. China

Twenty-six diterpenoids and sesquiterpenoids were isolated from Siegesbeckia orientalis. Among them, fifteen are ent-pimarane diterpenoids and diterpenoid glycosides, and eleven are *** diterpenoids include eight new diterpenoids, ent-12.,16-epoxy-2.,15.,19-trihydroxypimar-8-ene (1), ent-12.,16-epoxy-2.,15.,19-trihydroxypimar-8(14)-ene (2., ent-2.,15.16,19-tetrahydroxypimar-8(14)-ene (3., ent-15.oxo-2.,16,19-trihydroxypimar-8(14)-ene (4), ent-2.oxo-15.16-dihydroxypimar-8(14)-en-16-O-β-glucopyranoside (5., ent-2.oxo-15.16,19-trihydroxypimar-8(14)-ene (6), ent-2.oxo-3.,15.16-trihydroxypimar-8(14)-en-3.O-β-gluco-pyranoside (7), and ent-2.,15.16,19-tetrahydroxypimar- 8(14)-en-19-O-β-glucopyranoside (9), and seven known diterpenoids 8, 10-15. Compounds 1 and 2.are novel ent-pimarane diterpenoids with an unprecedented 12..,16-epoxy *** sesquiterpenoids comprise eight new ones, namely, 8α-angeloyloxy-4β, 15.dihydroxy- 14-oxo-1α,5.αH-guaia-9,11(13.-dien-12.6α-olide (16), 4β,15.dihydroxy-8 α-isobutyryloxy- 14-oxo-1α,5.αH-guaia-9,11(13.-dien-12.6α-olide (17), 4β,10β-dihydroxyl-11,12.13.trinor-1α,5.H-guaia-6-en (18), 8-angeloyloxy-15.hydroxy-14-oxo- germacra-(10)E,4E, 8Z,11(13.-tetraen-12.6α-olide (2.), and 8β-angeloyloxy-14,15.dihydroxy- 4βH-germacra-1(10)E, 11(13.-dien-12.6α-olide (2.), 8β-angeloyloxy-9α-ethoxy-15.hydroxy- 14-oxo-germacra-1(10)E, 4Z, 11 (13.-trien-12.6α-olide (2.), 8β-angeloyloxy-9α, 13.diethoxy-15.hydroxy- 14-oxo-germacra-1(10)E,4Z-dien-12.6α-olide (2.), and 8β-angeloyloxy-9α-ethoxy-15.hydroxy-13.methoxy- 14-oxo-germacra-1(10)E,4Z-dien-12.6α- olide (2.), and three known sesquiterpenoids 19, 2. and 2.0} Their structures were established by spectral methods, especially 1D- and 2.- NMR spectral *** plants of genus Siegesbeckia (Compositae) are annual herbs widely distributed in tropical, subtropical, and temperate parts of the world. Three species of Siegesbeckia grow in China and the aerial parts have been used as a tradit

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Al替代Ni对LaNi_(5.x)Al_x性能的影响

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稀土 2004年第3期25卷 5-8页

作者：曹大力张瑞静冷海燕陈德敏吕曼祺杨柯中国科学院金属研究所

通过对LaNi5.xAlx(x=0.2.0}0.5.0.75.1.0)系合金及其氢化物的晶体结构XRD分析,发现Al的添加并未改变合金的晶体结构类型,只是晶格常数变大。对合金的热力学性能实验研究表明,随着Al含量的增加,贮氢合金的平衡氢压降低,吸氢量减少,滞后现... 详细信息

通过对LaNi5.xAlx(x=0.2.0}0.5.0.75.1.0)系合金及其氢化物的晶体结构XRD分析,发现Al的添加并未改变合金的晶体结构类型,只是晶格常数变大。对合金的热力学性能实验研究表明,随着Al含量的增加,贮氢合金的平衡氢压降低,吸氢量减少,滞后现象得到改善,焓变值的绝对值增加。对合金的动力学性能实验研究表明,吸氢速度随x的增加而减慢。

关键词： LaNi5.xAlx系合金晶体结构热力学性能吸氢速度

[MeNH2.2.Zn(BTC)(BDT)0.5.·DMF:A New Metal-organic Framework Compound Based on Two Kinds of Organic Ligands

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[MeNH2]2[Zn(BTC)(BDT)0.5]·DMF:A New Metal-organic Framework...

中国化学会第六届全国结构化学学术会议

作者： Ze-Ping Wang,Mei-Ling Feng and Xiao-Ying Huang~* State Key Laboratory of Structural Chemistry,Fujian institute of Research on the Structure of Matter,the Chinese academy of {2.,Fuzhou,Fujian 3.3.002.P.R.China

Metal-organic framework compounds have attracted tremendous attention for their great potential in gas storage,separation,and catalysis ***,we report a new three-dimensional(3.) metal-organic framework compound,namely,(MeNH)[Zn(BTC)(BDT)]·DMF(HBTC = 1,3.5.Benzenetricarboxylic acid;HBDT = 1,4-phenylene(5.5.-1H-tetrazole)·{3.O;DMF =

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1种抗细胞畸变保健型酸奶的研制

中国食品学报 2013年第1期13卷 73-79页

作者：贺嘉怡古绍彬吴影李市场翟鑫杨剑波河南科技大学食品与生物工程学院河南洛阳471003 安徽省农业科学院水稻研究所合肥230031

以SOS/umu毒性测试为基础,结合动物功效评价试验,筛选到几种具有显著抗细胞畸变的植物提取物。以具有良好抗畸变能力的刺五加、绿茶、葡萄籽等提取物为原料,将其与牛乳、蔗糖等混合后接种发酵,开发出1种抗细胞畸变保健型酸奶。通过单因... 详细信息

以SOS/umu毒性测试为基础,结合动物功效评价试验,筛选到几种具有显著抗细胞畸变的植物提取物。以具有良好抗畸变能力的刺五加、绿茶、葡萄籽等提取物为原料,将其与牛乳、蔗糖等混合后接种发酵,开发出1种抗细胞畸变保健型酸奶。通过单因素和正交试验设计获得该产品的最佳工艺条件,其中植物提取物组合物的添加量为产品总量的15.(体积分数),蔗糖9%,发酵剂接种量5.,发酵温度44℃,发酵时间6h。用该保健型酸奶喂养经MMC处理的小鼠,试验结果表明,该产品可显著提高小鼠的抗畸变能力,以0.2.L/10g剂量灌胃1周后,小鼠骨髓微核率仅3.5.‰,胸腺指数1.5.,精子畸变率(19.40%),抗畸变效果明显优于对照组和普通酸奶喂养组。

关键词：植物提取物 SOS umu试验抗畸变保健型酸奶

甘肃莲花山自然保护区栗背岩鹨的繁殖记录和孵卵节律

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四川动物 2003年第2期22卷 91-92页

作者：蒋迎昕孙悦华毕中霖宋江宁中国科学院动物研究所北京100080 甘肃省莲花山保护区

2. 0 2. 5. 7月 ,在甘肃莲花山自然保护区对栗背岩鹨的繁殖生态做了进一步观察。记录了栗背岩鹨卵的大小、形状、颜色 ,产卵过程和孵卵节律。栗背岩鹨孵卵期为 15. ,育雏期为 14天。

关键词：甘肃莲花山自然保护区栗背岩鹨繁殖孵卵节律

用白细胞促凝血活性(LPCA)试验检测弓形体接种猪的细胞免疫功能

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江苏农业学报 1986年第3期 40-45页

作者：徐之昌江苏省农业科学院畜牧兽医研究所

通过LPCA试验研究了弓形体虫株接种猪后产生的细胞免疫功能。LPCA试验与迟发型变态反应具有很好的相关性,比E—玫瑰花结形成试验更为敏感,接种强、弱毒弓形体后测得的LPCA值分别为11.00和10.43.二者差异不显著(P〉0.05.。对照组LPCA值为... 详细信息

通过LPCA试验研究了弓形体虫株接种猪后产生的细胞免疫功能。LPCA试验与迟发型变态反应具有很好的相关性,比E—玫瑰花结形成试验更为敏感,接种强、弱毒弓形体后测得的LPCA值分别为11.00和10.43.二者差异不显著(P〉0.05.。对照组LPCA值为4.17,与试验组比较均有极显著差异(P〈0.01)。用LPCA试验测得的机体细胞免疫的动态关系表明:接种强毒虫株后,机体的细胞免疫力于第5.6天达到显著水平,但接种弱毒虫株后第9—10天才达到显著水平。

关键词：弓形体白细胞促凝血活性试验细胞免疫

Observation of 6.5.day waves in the MLT region over Wuhan

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Observation of 6.5-day waves in the MLT region over Wuhan

中国科学院地质与地球物理研究所2.08学术年会

作者： G.Jiang~(a,b,c),J.Xiong~(a,*),W.Wan~a,B.Ning~a,L.Liu~a a institute of Geology and Geophysics,Chinese academy of {2.,P.O.Box 982.3.Beijing 10002.,PR China b Key Laboratory of Space Weather,Center for Space Science and Applied Research,Beijing,China c Graduate School of Chinese academy of {2.,Beijing,PR China

In this paper,the 6.5.day planetary waves over Wuhan(3..5.N,114.3.E) were investigated on the basis of the meteor radar measurements within 78-98 km height region during February 2.02.December *** observations show that 6.5.day waves have a prominent seasonal variability and have larger amplitudes at equinoxes than at *** also found that intensive waves occur mostly between 84 and 98 km,and the zonal components of 6.5.day waves are a little larger than its meridional components on *** main periods of 6.5.day waves are near 6-7 days in spring/winter season and 5.7 days(even extend to 8 days) in autumn ***,these waves exhibit a downward progression when the amplitude is *** wave events occur basically in eastward background *** the 4-year interval, the strongest waves were found in Apri--May of 2.03.and 2.04.

关键词： 6.5.day waves Planetary waves Mesosphere and lower thermosphere Mesospheric dynamics

雌核发育银鲫和两性融合发育鱼（红鲫和彩鲫）卵壳结构及其组成的比较研究

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水生生物学报 1995年第1期19卷 61-65页

作者：丁军蒋一单仕新魏丽华中国科学院水生生物研究所

作者以两性融合发育鱼（红鲫、彩鲫）为对照，对雌核发育银鲫卵壳的表面结构及其可溶性蛋白的组成进行了研究：（１）雌核发育银鲫卵壳表面比较平滑，没有明显的嵴和沟；（２）雌核发育银鲫卵壳可溶性蛋白的含量略高于两性融合发育鱼（... 详细信息

作者以两性融合发育鱼（红鲫、彩鲫）为对照，对雌核发育银鲫卵壳的表面结构及其可溶性蛋白的组成进行了研究：（１）雌核发育银鲫卵壳表面比较平滑，没有明显的嵴和沟；（２）雌核发育银鲫卵壳可溶性蛋白的含量略高于两性融合发育鱼（红鲫、彩鲫），并且在ＩＩ区段存在一条分子量为１０万Ｄａｌｔｏｎ的特异蛋白区带。并对银鲫卵壳结构及组成的特殊性与银鲫卵初级控制作用间的关系进行了初步探讨。

关键词：雌核发育银鲫两性融合发育鱼卵壳结构

Cytotoxic and antibacterial flavonoids from dragon' s blood of Dracaena cambodiana

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Cytotoxic and antibacterial flavonoids from dragon' s blood ...

海南省药学会2.11年学术年会

作者： Ying Luo~(1,+),Hui Wang~(1,2.+),You-Xing Zhao~(1,2.,Yan-Bo Zeng~(1,2.,Hai-Yan Shen~1,Hao-Fu Dai~(1,2.*),and Wen-Li Mei~(1,2.*) 1 Hainan Key laboratory for research and development of natural products from Li folk medicine,institute of Tropical Bioscience and Biotechnology,Chinese academy of Tropical Agricultural {2. 5.1101, Haikou,Hainan,PR China 2.Haikou Key laboratory for research and development of tropical natural products,5.1101,Haikou, Hainan,PR China

Chemical studies on the constituents from dragon’s blood of Dracaena cambodiana led to the discovery of three new flavonoid derivatives(1-3.,and six known compounds(4-9).The structures of the three new compounds were elucidated by NMR and MS spectroscopic *** compounds were evaluated for their growth inhibitory activity against human cell lines K-5.2.SMMC-772.,and SGC-7901,as well as antibacterial activities against Staphylococcus aureus and methicillin-resistant Staphylococcus aureus(MRSA).As a result, compounds 1,2.5.7,and 9 showed cytotoxicity against K-5.2.SMMC-772.,and SGC-7901 cell *** these compounds were observed to exhibit antibacterial activities against ***,and compounds 1-4,6,8,and 9 were observed to exhibit antibacterial activity against MRSA.

关键词： Dracaena cambodiana Agavaceae Dragon’s blood Flavonoids Cytotoxicity Antibacterial activity