艾蒿柱层析馏分成分分析

将甲苯浸泡获得的艾蒿提取物置于硅土层析柱上,再用乙酸乙酯淋洗获得一个柱层析馏分。用气相色谱对该馏分进行分离,用质谱法和红外光谱法对分离组分进行了结构鉴定。共鉴定出20个纽分,其中倍半萜3个,单萜6个,在这9个萜类组分中,有3个是首次报道。同样,用液相色谱-质谱联用仪(LC—DAD-MSD)对该馏分进行了分析鉴定,结果显示这些组分中可能存在大量的萜类物质。     

野核桃壳中元素的测定分析

采用等离子体原子发射法测定了野核桃壳中的元素含量。结果表明,野核桃壳中含S、Ca、K、Na、Mg、P、Fe、Mn、Se等多种对人体有益的元素,且S含量特别高。有害元素Pb未检出,As含量为0.81×10-6,Hg含量为1.30×10-6。     

高效液相色谱Pico－Tag法测定野蕨菜氨基酸成分

高效液相色谱Ｐｉｃｏ－Ｔａｇ法测定野蕨菜氨基酸成分陈柏林，郭敏（四川农业大学动物营养研究所四川雅安６２５０１４）１前言高效液相色谱（ＨＰＬＣ）Ｐｉｃｏ－Ｔａｇ法因采用柱前衍生，反相色谱分离￣［１］，具有分析时间短、灵敏度高、重现性好等优点，广泛地用于...     

山腊梅中挥发油成分分析

山腊梅(Chimonanthus nitensO liv.)除了具有较大的观赏价值,还具有较高的药用价值,如中国药典记载山腊梅叶可用于防治感冒和流行性感冒[1],中药腊梅解毒汤能治疗单纯疱疹性角膜炎,目前临床上已开发出了腊梅止咳露、山腊梅滴丸等产品。山腊梅具有浓郁的香味,据报道山腊梅叶的精     

苍术挥发油成分的分析

用色谱－质谱－计算机联用法分析了南苍术挥发油的化学成分和相对百分含量，分离出６２种组分，鉴定出２２种化合物，占其挥发油总量的８９２％。     

紫茉莉根挥发油成分分析

为鉴定紫茉莉根挥发油的化学成分,按2000年版中国药典规定的方法提取挥发油,采用气相色谱-质谱联用仪分析了紫茉莉根挥发油的化学成分。结果表明,从紫茉莉根中提得0.12%的挥发油,鉴定了其中23种化合物,这些成分均为首次从紫茉莉根中分离鉴定,为进一步研究紫茉莉根的化学成分提供有益的补充。     

野百里香挥发油化学成分的研究

本文采用毛油管气相色谱-质谱法研究了宁夏六盘山区野百里香挥发油的化学成分。色谱分离出30多个组分,质谱鉴定了29个成分。其主要成分是(牛龙)牛儿醇(26.95%)、香荆芥酚(18.40%)和百里香酚(17.72%)。挥发油的红外光谱图中有较强的羟基吸收峰,为质谱鉴定的主要成分提供了佐证。     

毛樱桃叶片挥发油成分GC-MS分析

采用GC—MS技术,分析了毛樱桃叶片中的挥发性成分．气相色谱共检测出163个峰,经与质谱标准图谱比较,鉴定了其中15种化学成分,其中含量较高的为棕榈酸酐、12E-11-甲基乙酸十四烯酯和十四酸甲基乙酯（相对百分含量分别为25．104％,4．873％和2．811％）．     

野西瓜中槲皮素提取工艺的研究

以槲皮素提取含量为评价指标,采用HPLC测定槲皮素的含量,选取超声波辅助提取时间、提取温度和甲醇水溶液浓度为考察因素,通过单因素实验和正交实验优选野西瓜中槲皮素的提取工艺.结果显示野西瓜中槲皮素提取工艺条件为:甲醇水溶液的浓度为90%,提取温度80℃,提取时间30 min.该提取方法简单、方便,为野西瓜中槲皮素的进一步研究提供依据.     

The artemisia L. Genus: a review of bioactive essential oils

Numerous members of the Anthemideae tribe are important as cut flowers and ornamental crops, as well as being medicinal and aromatic plants, many of which produce essential oils used in folk and modern medicine and in the cosmetics and pharmaceutical industry. Essential oils generally have a broad spectrum of bioactivity, owing to the presence of several active ingredients that work through various modes of action. Due to their mode of extraction, mostly by distillation from aromatic plants, they contain a variety of volatile molecules such as terpenes, phenol-derived aromatic and aliphatic components. The large genus Artemisia L., from the tribe Anthemideae, comprises important medicinal plants which are currently the subject of phytochemical attention due to their biological and chemical diversity. Artemisia species, widespread throughout the world, are one of the most popular plants in Chinese traditional preparations and are frequently used for the treatment of diseases such as malaria, hepatitis, cancer, inflammation and infections by fungi, bacteria and viruses. Extensive studies of the chemical components of Artemisia have led to the identification of many compounds as well as essentials oils. This review summarizes some of the main reports on the chemistry and anti-infective activities of Artemisia. Li. essential oils from the data in the recent literature (2000-2011).     

Study of quantitative and qualitative variations in essential oils of Sicilian Rosmarinus officinalis L.

In this study the chemical characterisation of 10 Sicilian Rosmarinus officinalis L. biotypes essential oils is reported. The main goal of this work was to analyse the relationship between the essential oils yield and the geographical distribution of the species plants. The essential oils were analysed by GC-FID and GC-MS. Hierarchical cluster analysis and principal component analysis statistical methods were used to cluster biotypes according to the essential oils chemical composition. The essential oil yield ranged from 0.8 to 2.3 (v/w). In total 82 compounds have been identified, these represent 96.7–99.9% of the essential oil. The most represented compounds in the essential oils were 1.8-cineole, linalool, α-terpineol, verbenone, α-pinene, limonene, bornyl acetate and terpinolene. The results show that the essential oil yield of the 10 biotypes is affected by the environmental characteristics of the sampling sites while the chemical composition is linked to the genetic characteristics of different biotypes.     

Phytochemical analysis of Saponaria officinalis L. shoots and flowers essential oils

Phytochemical analysis by GC and GC/MS of the essential oil samples obtained from fresh shoots and flowers of Saponaria officinalis L. allowed the identification of 96 components in total, comprising 94.7% and 86.0% of the total oils compositions, respectively. Regarding the shoots essential oil, the major of 87 identified volatile compounds were phytol (14.1%), tricosane-6,8-dione (13.4%), patchouli alcohol (7.9%) and tricosane (7.2%), whereas patchouli alcohol (20.0%), heneicosane (11.5%) and tricosane (8.4%) were dominant among the 66 volatiles in the flower oil. Nonterpenoid compounds had the highest contribution in S. officinalis shoots essential oil (53.7%), while in the flower oil, constituents were almost evenly distributed between the oxygenated sesquiterpenoid (41.2%) and nonterpenoid compounds (39.5%).     

Composition of the essential oils of Lycium barbarum and L. ruthenicum fruits

Water-distilled essential oils from the fruits of Lycium barbarum and L. ruthenicum were analyzed by GCMS. The main components in the oil of L. barbarum were found to be hexadecanoic acid (47.5%), linoleic acid (9.1%), β-elemene (5.4%), myristic acid (4.2%), and ethyl hexadecanoate (4.0%). The essential oil of L. ruthenicum has heptacosane (14.3%), ethyl linoleate (10.0%), hexacosane (7.0%), nonacosane (6.2%), and ethyl hexadecanoate (5.8%) as the main compounds. Published in Khimiya Prirodnykh Soedinenii, No. 1, pp. 20–21, January–February, 2006.     

Variability of two essential oils of Kundmannia sicula (L.) DC., a traditional Algerian medicinal plant

The essential oils of the aerial parts of Kundmannia sicula (L.) DC collected from two Algerian localities, El Kala (near the coast) and Béjaia (from a meadow about 10 km from the coast), were analysed by GC and GC-MS. Although both samples showed similar overall chemical compositions, the major components of the Béjaia sample were identified as being spathulenol (14.8%), caryophyllene oxide (12.2%), salvial-4(14)en-1-one (10.1%), 1,5-epoxysalvial-4(14)ene (5.2%) and germacrene D (3.2%), while in the ElKala sample the main compounds were found to be salvial-4(14)en-1-one (16.4%), 1,5-epoxysalvial-4(14)ene (6.5%), chrysanthenyl acetate (5.2%) and alpha-amorphene (2.9%).     

Essential oils of some artemisia species from Central Asia

Water distilled essential oils from aerial parts of the following Artemisia species (Compositae) were analyzed by GC/MS. The major component of the oils were as follows: 1,8-cineole inA. balchanorum (29.9%), camphor inA. leucodes (58.4%), andA. rhodantha (35.5%) and methyl eugenol inA. scoparia (27.5%).Materials presented at the 2nd International Conference of Natural Compounds.Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 383–385, May–June, 1997.     

蒙古蒿精油化学成份的研究I.

The chemical constituents of the essential oil from the leaves of artemisia mongolica Fisch. were separated by gas chromatography employing glass capillary eolumns and identified by GC-MS-COM. 30 components have been separated and identified, i.e. 2-methyl-2-butene, methylene cyclopentane, 7,7-dimethyl-3-methylen-bicyclo-(3, 1, 1) heptane, α-thujene, α-pinene, camphene, 1-octen-3-o1, β-thujene, β-pinene, α-phellandrene, bornylene, p-cymene, terpinen-1-o1, artemisia ketone, γ-terpinene, β-terpineol, 3,7,7-trimethyl-bicyclo-(3, 1,1)-2-heptanol, α-terpinolene, verbenone, linalool iso-thujone, thujone, camphor, isopulegone, isoborneol, terpinen-4-o1, α-terpineol, myrtenol, trans- carveol, cis-carveol.     

Chemical composition,phytotoxic and antifungal properties of Ruta chalepensis L. essential oils

The chemical composition, and phytotoxic and antifungal activities of the essential oils isolated by using hydrodistillation from the aerial parts of Tunisian rue were evaluated. Significant variations were observed among harvest periods. The analysis of the chemical composition by gas chromatography/mass spectrometry showed that 2-undecanone (33.4–49.8%), 2-heptanol acetate (13.5–15.4%) and α-pinene (9.8–11.9%) were the main components. The antifungal ability of rue essential oils was tested by using disc agar diffusion against ten plant pathogenic fungi. A high antifungal activity was observed for the essential oil isolated at flowering developmental phase. Furthermore, rue essential oils showed high level of herbicidal activity against several weeds.     

Activity antifungal of the essential oils; aqueous and ethanol extracts from Citrus aurantium L.

Our study is about the essential oil of Citrus aurantium L. in Tunisia and its plant extract. The yield of this essential oil is 0, 56% but the yield of the extract of plant was 17.1% for the aqueous extract ant 18.3% for the ethanolic extract. The analysis of chemical composition by using GC and GC/MS showed the essential oil of C. aurantium L. species to be rich in monoterpenes such as α-terpineol, lianolyl acetate, linalool and limonene. The antifungal activity of this oil showed us an inhibition of the germination of mushrooms, in the same way we could note that the biologic activities are generally assigned to the chemotypes high content in oxygenated monoterpene.