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白木香的化学成分与生物活性研究进展 总被引:1,自引:0,他引:1
白木香(Aquilaria sinensis)的化学成分主要包括黄酮、苯甲酮、木脂素、苯丙素、萜类、生物碱、甾体以及其他酚性化合物,一些化学成分具有抗肿瘤、抗菌、抗炎、镇痛、利泄、降糖等生物活性。对近年来从白木香中分离鉴定出的化学成分,以及部分化学成分的生物活性进行了综述,为白木香资源的合理开发利用提供科学依据。 相似文献
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蜂海绵属(Haliclona)在海洋生态系统中分布较为广泛,从中分离到许多结构新颖的化学成分,包括生物碱、炔类、萜类、甾醇等,其中以生物碱类化合物最为典型,并且大多化学成分有较强生物活性,如细胞毒、抗菌、抗污、抗肿瘤等。本文综述了国内外近10年有关蜂海绵属的化学成分及生物活性的研究,旨在为该属海绵的化学成分和生物活性的进一步研究提供参考。 相似文献
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福建樟树叶油的化学成分及其含量分析 总被引:6,自引:3,他引:3
樟树[Cinnamomum camphora(L.)Pres]叶油中的许多化学成分有广泛而重要的用途。有研究表明,由于长期受个体发育、系统发育、生殖隔离及生态环境的作用,樟树不同种群和个体之间精油的化学成分差异较大,有必要对樟树不同居群和不同个体精油的化学成分及其含量进行系统的研究。作者以分布在福建省内的樟树为调查对象,利用GC—MS法系统测定福建樟树叶油的化学成分及其含量,为樟树叶油化学成分的挖掘、开发利用和樟树的良种选育提供科学依据。 相似文献
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为探究酒制对女贞子化学成分的影响,采用UPLC-Orbitrap-MS技术结合多元统计分析对生女贞子、酒女贞子差异性化学成分进行研究。基于分子网络技术、主成分分析(PCA)模型和正交偏最小二乘法-判别分析(OPLS-DA)模型筛选女贞子酒制前后出现差异的主要化学成分。共鉴定出42种化学成分,结果显示PCA,OPLS-DA可将女贞子与酒女贞子完全区分开来,OPLS-DA筛选出VIP>1的22个酒制前后出现差异的主要化学成分。本研究建立了一种新的数据处理策略,以系统识别生女贞子和酒女贞子的化学成分,筛选女贞子酒制前后的差异性成分,为进一步研究女贞子酒制增效物质基础及原理提供坚实的基础。 相似文献
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猪屎豆属植物化学成分及药理活性研究概况 总被引:2,自引:0,他引:2
综述近年来猪屎豆属植物化学成分和药理活性研究概况。提出在化学成分、构效关系、药理等方面均需要进一步开展深入研究的建议。 相似文献
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Molecular phylogenetics of the giant genus Croton and tribe Crotoneae (Euphorbiaceae sensu stricto) using ITS and TRNL-TRNF DNA sequence data 总被引:1,自引:0,他引:1
Parsimony, likelihood, and Bayesian analyses of nuclear ITS and plastid trnL-F DNA sequence data are presented for the giant genus Croton (Euphorbiaceae s.s.) and related taxa. Sampling comprises 88 taxa, including 78 of the estimated 1223 species and 29 of the 40 sections previously recognized of Croton. It also includes the satellite genus Moacroton and genera formerly placed in tribe Crotoneae. Croton and all sampled segregate genera form a monophyletic group sister to Brasiliocroton, with the exception of Croton sect. Astraea, which is reinstated to the genus Astraea. A small clade including Moacroton, Croton alabamensis, and C. olivaceus is sister to all other Croton species sampled. The remaining Croton species fall into three major clades. One of these is entirely New World, corresponding to sections Cyclostigma, Cascarilla, and Velamea sensu Webster. The second is entirely Old World and is sister to a third, also entirely New World clade, which is composed of at least 13 of Webster's sections of Croton. This study establishes a phylogenetic framework for future studies in the hyper-diverse genus Croton, indicates a New World origin for the genus, and will soon be used to evaluate wood anatomical, cytological, and morphological data in the Crotoneae tribe. 相似文献
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《Nordic Journal of Botany》2007,25(3-4):206-216
A palynological analysis of 22 taxa of Croton sect. Lamprocroton (Müll. Arg.) Pax was accomplished in order to obtain evidence for a good interspecific delimitation and phylogenetic characterization of this group. Samples of 22 taxa (from which approximately 90% of the species belonged to this section) were obtained from herbarium specimens; moreover, pollen grains were analyzed with light and scanning electron microscopy. Characters observed from pollen grain diameter and from exine ornamentation were registered and compared. Pollen grains were found to be spherical, apolar, inaperturate and with a diameter ranging from 49.32±0.94 μm in C. ehrenbergii Schltdl. to 86.42±1.33 μm in C. muellerianus L. R. Lima . Pollen morphology of three recently described species of Croton was analyzed for the first time herein. In addition the results of this study confirm the distinctness of these species but do not support a recently proposed new variety of C. pallidulus Baill. 相似文献
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In recent years the genus Croton has been of particular interest following the isolation of 11 different 12,13-diesters of the polyfunctional diterpene phorbol (1a), from the seed oil of Croton tiglium; these compounds represent its toxic, irritant and cocarcinogenic principles [1]. In addition, croton oil contains what is called “cryptic” cocarcinogens of the phorbol-12,13,20-triester type [1]. The structurally related but non-irritant diterpene ester 20-acetoxy-9-hydroxy-13,15-seco-4α-tigliatriene-(1,6,14)-dione-(3,13) [2] and crotofolin A have been isolated from C. rhamnifolius [3] and from C. corylifolious L. [4], respectively. 相似文献
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The topical anti-inflammatory activity of the ethanol and aqueous extracts from the aerial parts of Lavandula multifida L. (Lamiaceae), used in the Moroccan traditional medicine, was investigated by inhibition of the Croton oil-induced ear edema in mice. The biological assay revealed a dose-dependent anti-inflammatory activity for the ethanol extract, while the aqueous one was less active. Bioassay-guided fractionation of the ethanol extract led to identify four triterpenic acids of oleanane series, four pimarane and one iso-pimarane diterpenes, as well as the phenolic monoterpene carvacrol and its glucoside. Some of these compounds revealed an anti-inflammatory activity comparable to that of indomethacin. 相似文献
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Daniela S. Carneiro-Torres Inês Cordeiro Ana Maria Giulietti Paul E. Berry Ricarda Riina 《Brittonia》2011,63(1):122-132
While conducting a floristic inventory of Croton from the Brazilian Caatinga, three new species were discovered. Croton arenosus, Croton glandulosobracteatus, and Croton harleyi are described and illustrated here. Based on morphological characters, Croton glandulosobracteatus is proposed to belong to section Barhamia, and C. arenosus and C. harleyi to section Geiseleria. 相似文献
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Neo-clerodane diterpenoids from Croton schiedeanus 总被引:2,自引:0,他引:2
Puebla P López JL Guerrero M Carrón R Martín ML San Román L San Feliciano A 《Phytochemistry》2003,62(4):551-555
Two new neo-clerodane type furano diterpenoids were isolated from the aerial part of Croton schiedeanus, besides the clerodane diterpenes cis- and trans-dehydrocrotonin, previously isolated from other species of Croton. Structural elucidation was achieved on basis of extensive NMR experiments, including X-ray diffraction analysis and molecular mechanics calculations. The previously known flavonoids ayanin and quercetin-3,7-dimethyl ether were also obtained from the extract of this plant. 相似文献