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Tomoya Okunishi Naohiro Takaku Patcharawadee Wattanawikkit Norikazu Sakakibara Shiro Suzuki Fukumi Sakai Toshiaki Umezawa Mikio Shimada 《Journal of Wood Science》2002,48(3):237-241
Lignan production in callus and cell suspension cultures ofDaphne odora is reported for the first time. The cell suspension culture produced pinoresinol, lariciresinol, secoisolariciresinol, matairesinol, and wikstromol. The production of matairesinol in the cell suspension culture was much higher than that inDaphne odora stem tissues.Part of this report was presented at the 51th annual meeting of the Japan Wood Research Society, Tokyo, April 2001 相似文献
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Naohiro Takaku Keigo Mikame Tomoya Okunishi Shiro Suzuki Toshiaki Umezawa Mikio Shimada 《Journal of Wood Science》2001,47(6):493-496
A new lignan isoactifolin was isolated from young shoots (with leaves) ofChamaecyparis obtusa cv. Breviramea. The structure of the compound was determined based on spectroscopic evidence.Parts of this report were presented at the 44th lignin symposium, Gifu, October 1999 相似文献
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对瑞香狼毒(Stellera chamaejasme L.)的化学成分进行研究,采用硅胶色谱、凝胶色谱、高效液相色谱等多种色谱手段对瑞香狼毒的乙酸乙酯提取物进行分离纯化,利用NMR、MS波谱分析鉴定3个木质素、1个二萜原酸酯、3个双黄酮、2个黄酮。枇杷素(5)、异落叶松树脂醇(7)和(-)-落叶松树脂醇(8)为首次从该植物中分离得到。PC-12细胞活性试验表明,双黄酮类化合物(狼毒色原酮(2),新狼毒素B(3),异新狼毒素A(4))对NGF依赖的PC-12细胞突起生长有较强的抑制活性(P0.05)。 相似文献
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Four lignans — pinoresinol, lariciresinol, secoisolariciresinol, matairesinol — were isolated from each ofDaphne odora andDaphne genkwa (Thymelaeaceae). Matairesinol isolated from both plants was optically pure (>99% e.e.) and dextrorotatory. Pinoresinol and lariciresinol isolated from the plants were not optically pure, and their enantiomeric compositions ranged from 88% to 95% e.e. in favor of (–)-enantiomers. As for secoisolariciresinol, the one fromD. odora was optically pure [(+)-enantiomer, >99% e.e.], and that fromD. genkwa was 97% e.e. in favor of the (+)-enantiomer. Lignan-synthesizing enzyme activity was detected from a Thymelaeaceae plant for the first time; cell-free extracts fromD. genkwa catalyzed the formation of (–)-lariciresinol (23% e.e.) from racemic (±)-pinoresinols. The stereochemistry of the enzymatic reaction is discussed in relation to the stereochemical features of the isolated lignans.Parts of this report were presented at the 42nd Lignin Symposium, Sapporo, October 1997; 48th Annual Meeting of the Japan Wood Research Society, Shizuoka, April 1998; and 49th Annual Meeting of the Japan Wood Research Society, Tokyo, April 1999 相似文献
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The extractives of shirakamba (Betula platyphylla Sukatchev var.japonica Hara) leaves were investigated. Two lignan glycosides were isolated, and their structures were elucidated to be 1-(4-hydroxy-3-methoxyphenyl)-2-[1-(3--l-rhamnopyranosyloxypropyl)-3-hydroxyphenoxy]-1,3-propanediol (I) and a new 2,3-dihydro-2-arylbenzofuran configuration neolignan,cis-2,3-dihydro-2-(4--l-rhamnopyranosyloxy-3-methoxyphenyl)-3-hydroxymethyl-7-hydroxy-5-benzofuranpropanol (II). These neolignan rhamnosides were newly found in shirakamba. 相似文献
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鹤庆五味子藤茎化学成分研究 总被引：2，自引：2，他引：0
[目的]研究鹤庆五味子藤茎的化学成分。[方法]采用柱层析和半制备高效液相色谱对鹤庆五味子藤茎的化学成分进行提取分离,并通过现代波谱法对化合物的结构进行鉴定。[结果]从鹤庆五味子藤茎中分离到6个化合物,分别为Wuweilignan E(1)、Methyl-gomisin R(2)、Methylisogomisin O(3)、Gomisin D(4)、Tigloylgomisin P(5)和Gomisin N(6)。[结论]化合物1、2和3均为首次从鹤庆五味子中分离得到。 相似文献
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芝麻种子木质素组分、粗脂肪、粗蛋白含量及相关性分析 总被引：7，自引：1，他引：7
对我国芝麻育成品种及高代品系共48份种子的主要品质成分粗脂肪和粗蛋白质及芝麻特有成分木质素(Lignan)组分芝麻明(Sesamin)、芝麻酚(Sesamol)和芝麻林酚(Sesamolin)的含量进行了分析.结果表明粗脂肪含量平均值为57.78%;木质素总量均值为0.829%,变幅为0.266%～1.278%,其中主要组分是芝麻明,平均含量为0.593%,筛选出一批优异种质资源.粗脂肪与粗蛋白质含量间呈极显著负相关,与芝麻明呈显著正相关,芝麻明与芝麻林酚呈极显著正相关,粗蛋白质与芝麻酚呈显著正相关. 相似文献
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为研究鹤庆五味子果实(Schisandra wilsoniana A.C.Smith)的化学成分,采用硅胶柱色谱、HPLC等分离操作进行分离,通过各种波谱法对化合物的结构进行鉴定。分离鉴定了5个化合物,其结构分别为(+)-γ-Schizandrin(Ⅰ),Kadsurin(Ⅱ),Tigloylgomisin P(Ⅲ),Prinsepiol(Ⅳ),WuweilignanⅠ(Ⅴ)。均是首次从鹤庆五味子果实中分离得到。 相似文献
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介绍了一种新型功能因子——木脂素,具有抗氧化、抗衰老、抗癌等功能,逐渐得到科学界的关注和重视。 相似文献