Components Essential Oils in Different Parts of Daucus carota L. var. sativa Hoffm

The components of the essential oils obtained from different parts of Daucus carota L. var. sativa Hoffm were analyzed. The percentages of the essential oils extracted are 0. 27% (mL/100 g material) for the flowers, 0. 07% for the stems and leaves and 0. 01% for the roots. Fifty-four, Sixty-six and Thirty-three compounds were, respectively,separated and identified from the flowers, the stems and leaves and the roots, among which unsaturated alkene compounds are thirty-nine, thirty-nine and twenty-one, respectively, accounting in turn for up to 90. 21%, 90. 49% and 72. 65% of the total essential oils. Because alkene compounds have double bonds that are easily oxidized, it can be inferred that the components of the essential oils in the different parts of Daucus carota L. var. sativa Hoffm should show an activity of the anti-formation of free radicals to some extent.     

Components of Essential Oils in Different Parts of Daucus carom L. var. sativa Hoffm

The components of the essential oils obtained from different parts of Daacus carota L.var. saliva Hoffm were analyzed. The percentages of the essential oils extracted are 0. 27% （ mL/100 g material） for the flowers, 0. 0/% for the stems and leaves and 0. 01% for the roots. Fifty-four, Sixty-six and Thirty-three compounds were,respectively, separated and identified from the flowers, the stems and leaves and the roots, among which unsaturated alkene compounds are thirty-nine, thirty-nine and twenty-one, respectively, accounting in turn for up to 90. 21%, 90. 49% and 72. 65% of the total essential oils. Because alkene compounds have double bonds that are easily oxidized, it can he inferred that the components of the essential oils in the different parts of Daucus carota L. var. saliva Hoffm should show an activity of the antioformation of free radicals to some extent.     

Two new eudesmane-type glucopyranosides from the fruits of Daucus carota L.

Two new eudesmane-type glucopyranosides have been isolated from the fruits of Daucus carota L. On the basis of their spectroscopic and chemical evidence, the new compounds were elucidated as daucucarotol-10-O-β-d-glucopyranoside (1) and decahydro-7-[(2-O-β-d-glucopyranosyl)-isopropyl]-1β,4aα-dimethyl-(1α,4α,8aβ)-naphthalenetriol (2). Compounds 1 and 2 showed moderate antitumour activity against human ECA-109 and gave IC₅₀ values of 23.22 and 26.76 μM, respectively.     

香芸火绒草精油化学成分研究

用毛细管气相色谱／质谱、毛细管气相色谱／付里叶红外联用技术对青海产香芸火绒草精油化学成分进行分离。共鉴定出１１９个化俣物，占全部峰面积的９６．８％。     

Isolation of biocidal peptides from Daucus carota seeds

Two biocidal peptides were isolated from carrot seeds (Daucus carota). Their fungicidal activity toward the pathogenic fungus Verticillium dahliae was investigated. __________ Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 167–168, March–April, 2006.     

菥蓂籽挥发油的GC/MS分析

菥蓂(Thlaspi arvenseLinn),又名苏败草、遏蓝菜、苦苦菜、罗汉菜,属双子叶植物药十字花科一年生草本植物,我国大部分地区均有分布,在川西北草原储量较丰富[1]。它既是一种中药材,又是一种可食用野生资源和潜在的油料作物来源。其种子含黑芥子甙(Sinigrin)及34%左右的油脂,味辛     

艾叶挥发油的化学成分

采用水蒸气蒸馏法从艾叶中提取挥发油,试用不同类型的毛细管柱进行分析,找出最佳分析条件,共分离出59个蜂,用归一化法测定其相对含量,并用气相色谱－质谱法对化学成分进行鉴定,共鉴定了51个万分,占挥发油总成分的86％以上。     

GC-MS法在黔产宽叶缬草质控中的应用

宽叶缬草(ValerianaofficinalisL.var.latifoliaMiq.)系败酱科植物。主产贵州,我国从东北至华北也有分布。具有镇静、镇痛、降压、解痉等作用。目前,对其挥发油研究较多,但采用气相色谱-质谱对药材质量进行研究较少。本文利用GC-MS,以水杨酸甲酯为内标,对药材中乙酸龙脑酯进行含量测定,建立其质量控制的方法。     

ααTwo new eudesmane sesquiterpenes from Lactuca sativa var. anagustata L

Two new eudesmane sesquiterpene lactones were isolated from the stalk of Lactuca sativa var.anagustata L and their structureswere elucidated by means of spectroscopic methods,including 2D NMR(~1H-~1H COSY,HMBC and NOESY) as 1β-O-β-D-glucopyranosyl-4α-hydroxyl-5α,6β,11βH-eudesma-12,6α-olide(1) and 1β-hydroxyl-15-O-(p-methoxyphenylacetyl)-5α,6β,11βH-eudesma-3-en-12,6α-olide(2).     

The Composition of Essential Oils from Various Parts of Juniperus foetidissima

Water-distilled oils from the leaf, cone berry, seedless cone berry, seed, and branch of Juniperus foetidissima were analyzed by GC/MS. The main components of the leaf oil were found as -thujone and cedrol. Sabinene was the major component in the essential oil of cone berries. Sabinene, -thujone, and abietal were the main components of the seed and seedless cone berry oils. In the branch oil -pinene was the major component.     

白千层挥发油化学成分分析

用毛细管气相色谱、气相色谱－ 质谱－ 计算机分析技术, 对植物白千层枝叶挥发油化学成分进行了分析研究, 从这种植物挥发油中分离出８０ 个以上的组分, 确认了其中的３５ 种成分, 所鉴定的组分占挥发油色谱总峰面积的９０ ％ 以上。     

气相色谱/质谱法分析曼陀罗果实挥发油的化学成分

用水蒸汽蒸馏法从曼陀罗果实中提取挥发油,并用气相色谱/质谱(GC/MS)联用技术对其化学成分进行分离和结构鉴定,用峰面积归一化法确定各成分的相对含量。结果确定了68种化合物,占挥发油总量的82.83%,其主要成分为6-戊基-5,6-二氢化吡喃-2-酮(9.13%)、3,7,11,15-四甲基-2-十六碳烯-1-醇(6.71%)、二苯酮(6.16%)和1-己醇(6.10%)等。     

生姜挥发性成分的分析

本文采用水蒸气蒸馏法提取了生姜挥发性成分，并用GC／MS方法对提取的挥发性成分进行了鉴定。共鉴定了30种化学成分，并进行了讨论。     

小叶桉精油化学成分研究

用交联毛细管柱气相色谱/质谱/计算机(GC/MS/MSD)联用技术测定小叶桉精油的化学成分,从中鉴定出67种化合物,主要成分为:桉树脑、α-蒎烯、β-蒎烯、桧烯和特丁基苯。     

木豆精油化学成分研究

用水蒸汽蒸馏法从木豆的叶和嫩枝中提出挥发油,并用交联毛细管柱气相色谱/质谱/计算机(GC/MS/MSD)联用技术测定木豆精油的化学成分。从中鉴定出23种化合物,主要成分为:菖蒲烯,β-芹子烯,α和β-Cuaiene,α-himachalene,苯甲酸苄酯和雅槛兰树油烯。     

GC-MS分析南方红豆杉种子中的挥发油

采用水蒸气蒸馏法提取南方红豆杉种子中的挥发油，测得南方红豆杉种子挥发油的收率为2．5％。通过GC-MS技术分析了南方红豆杉种子中挥发油的化学成分。按照GC／MS通用法则，初步确定了24种化合物的结构。并用峰面积归一化法得出在挥发油中的各化学成分。其中主要成分酸类占挥发油总量的81．28％．其次的烷烃类化合物为12．74％，醛类化合物为1．80％，不饱和烷烃类化合物1．44％，醇类化合物占0、89％，酯类化合物为0．52％，胺类化合物为0．34％。这几类物质占种子中挥发油总量的99．01％。     

黄荆子挥发性成分的分析

分别采用水蒸汽蒸馏法和超临界流体CO2萃取法提取黄荆子中的挥发性成分.利用气相色谱-质谱(GC/MS)联用技术对其化学成分进行了分析鉴定,并通过面积归一法测定了各成分的相对含量.对两种提取方法的结果进行了比较.结果表明,子午岭的黄荆子中含有多种药用成分,而超临界流体CO2萃取法更能有效地提取黄荆子中的有效成分.     

引种欧洲香型玫瑰精油化学成分研究

用毛细管气相色谱／质谱联用技术和气相色谱Ｋｏｖａｔｓ指数双重定性方法，从保加利亚，法国，土耳其和摩洛哥四国引种的欧洲香型玫瑰的精油中分别鉴定出９４个化合物，其主要赋香成分与原生产国家的十分接近。这一研究结果为首次报道并在中国扩大种欧洲香型玫瑰提供了科学依据。     

沙漠植物百花蒿精油中酯类和萜类成分的研究

采用ＧＣ／ＭＳ方法对采自腾格里沙漠南缘的百花蒿新鲜花的精油进行了分析，共鉴定出５５个组分，并测定了它们的百分含量。其化学组成大多为酯类和萜类，其中主组分是β－月桂烯和匙叶桉油烯醇。将其精油与蒿属不同种植物的精油作了比较，这为把百花蒿从蒿属中分离出来提供了化学分类依据。同时探讨了其药用价值。