GC-MS法分析曼陀罗挥发油的化学成分

用水蒸气蒸馏法从曼陀罗中提取挥发油,并用气相色谱/质谱联用技术(GC-MS)对挥发油的化学成分进行分离鉴定,用气相色谱峰面积归一化法确定各组分的相对含量.结果从曼陀罗挥发油中鉴定出58种化合物,占总挥发油量的92.37%.其中主要成分为5,6-二氢-6-戊基-2H-吡喃-2-酮(44.29%)、二苯胺(12.50%)、四十四烷(10.41%)、二十烷(4.19%)、(E)-3-己烯-1-醇(2.38%)、3,7,11,15-四甲基-2-十六碳烯-1-醇(2.28%)等.     

抱茎蓼挥发油成分及其抗菌活性的研究

水蒸气蒸馏法从抱茎蓼全草中提取挥发油,用气相色谱-质谱联用技术对其挥发油组分进行分离和鉴定,运用气相色谱面积归一化法确定各组分的相对含量,并利用正构烷烃系列物质对各组分进行定性确定,从抱茎蓼全草的挥发油中检出41个组分,占全油的99.21%,鉴定出38个组分,其主要组分是石竹烯(16.98%)、3-己烯-1-醇(14.69%)、3-辛烯-3醇(8.89%)、a-里哪醇(7.13%)、β-环柠檬醛(6.36%)等。对抱茎蓼全草的挥发油做了抗菌试验,其挥发油对大肠埃希菌(ATCC25922株)、肠炎沙门菌(50040株)、金黄色葡萄球菌(ATCC25925株)有显著地抑制和灭活作用。     

野生蜂窝草籽中挥发油的研究

采用水蒸气蒸馏法从野生蜂窝草籽中提取挥发油,利用气相色谱-质谱联用技术对其挥发油中的化学组分进行分离和结构鉴定,运用气相色谱面积归一化法确定各个组分的相对百分含量。从蜂窝草籽挥发油中鉴出56种成分,主要组分是油酸(12.57%),棕榈酸(10.36%),1-辛烯-3-醇(7.96%),石竹烯(5.98%),2,4,6-三甲基-1,3,6-庚三烯(5.63%)等。对蜂窝草籽挥发油进行了抗氧化实验和抗菌实验,结果表明蜂窝草籽挥发油对.OH有明显的清除作用,蜂窝草籽挥发油对实验菌株均有明显的抑制和灭活作用特别是对大肠杆菌ATCC25922株和肠炎沙门菌50040株的抗菌活性表现得更为显著。     

钻地风挥发油化学成分及抗炎活性的研究

为了研究钻地风挥发油的化学成分及其抗炎药效,我们采用水蒸气蒸馏法提取钻地风挥发油并用气相色谱-质谱(GC-MS)技术分析,分别用佛波酯醇(PMA)或二甲苯(xylene)诱导小鼠耳肿胀,在致炎部位外涂钻地风挥发油以观察疗效.从钻地风挥发油中分离并鉴定了24个组分,占总峰面积含量的96.01%,主要由萜类、芳香羟类成分构成,分别为(E)-1,2-亚甲二氧基-4-丙烯基-苯(23.47%),桉树脑(11.503%),芳樟醇(9.558%),β-松油醇(9.201%),α-蒎烯(7.185%)等,实验显示钻地风挥发油外用可以显著抑制佛波酯醇或二甲苯诱导的小鼠耳肿胀.     

深山含笑叶片的挥发油成分及其生物活性研究

采用水蒸气蒸馏法及GC-MS联用技术提取并分析了深山含笑(Michelia maudiae Dunn)叶片的挥发油成分,并用杯碟法和Alamar blue法检测了其抑菌和抗肿瘤生物活性。从深山含笑挥发油中共分离出45种化合物,并鉴定出其中37种化合物,占挥发油总相对含量的97.8%;挥发油主要成分有莰烯(16.575%)、β-蒎烯(15.857%)、D-柠檬烯(12.653%)、丁香烯(11.923%)、1R-α-蒎烯(6.855%)及橙花叔醇(5.199%)等。该挥发油对金黄色葡萄球菌(Staphalococus aureus Rosenbach)和红酵母(Rhodotorula glutinisTrans.)有一定的抑制能力;对人非小细胞肺癌细胞(NCI-H460)有较强的抑制作用,浓度为100 mg.L-1,抑制率可达98.89%以上。     

利用GC-MS技术分析油橄榄叶挥发油化学成分

本文采用同时蒸馏萃取法(SDE)提取油橄榄叶挥发油化学成分,利用气相色谱-质谱(GC-MS)联用方法分析并用峰面积归一化法得出各化学成分在挥发油中的百分含量。结果从油橄榄叶挥发油中分离出62各色谱峰,鉴定出56个化合物,占挥发性组分总量的95.6%。其中主要成分为α-芹子烯(13.13%)、β-芹子烯(10.15%)、β-石竹烯(14.29%)、橙花叔醇(6.72%)、α-石竹烯(6.60%)、3-己烯-1-醇(5.03%)、苯乙醛(5.61%)等。     

利用GC-MS技术分析三棱挥发油化学成分(英文)

本文采用同时蒸馏萃取法(SDE)提取三棱挥发油化学成分,测得三棱挥发油的得率为3.19%.利用气相色谱-质谱(GC-MS)联用方法从三棱挥发油中分离并确认出32种化学成分.用峰面积归一化法通过G1710BA化学站数据处理系统得出各化学成分在挥发油中的百分含量,其中主要成分为3,5,6,7,8,8a-六氢-4,8a-二甲基-6-(11-methylethyenyl)-2(1H)萘酮(12.95%),2,4,6,7,8,8a-六氢-5(1H)-黄酮(10.72%),十氢4a-甲基-1-萘(5.78%),3H-3a,7-甲撑甙菊环烃(5.69%).     

粤东产重瓣臭茉莉挥发油化学成分的GC-MS分析

采用水蒸气蒸馏法对粤东产重瓣臭茉莉(Clerodendrum chinense (Lour.) Merr.)挥发油进行提取, 并运用GC-MS对其成分进行分析和鉴定。结果分离出31个峰, 确定了31种化合物, 按峰面积归一化法计算各组成化合物的相对百分含量。所鉴定化合物的含量占全油的100%, 其主要成份1-辛烯-3-醇(蘑菇醇) (49.50%)、(E)-3-己烯-1-醇(青叶醇) (13.39%)、芳樟醇(9.41%)、环己醇(3.37%)、3-辛醇(1.69%)、n-正戊酸-(Z)-3-己烯酯(1.42%)、1-己醇(1.38%)、糠醛(1.37%)和a-萜品烯醇(1.17%)等9种化合物占全油的81.53%。     

前胡挥发油胆碱酯酶抑制作用及化学成分研究

运用微孔高通量筛选方法研究前胡挥发油胆碱酯酶抑制活性,并用气相色谱-质谱联用技术辅以Kovats指数鉴定挥发油的主要化学成分。结果显示前胡挥发油对乙酰胆碱酯酶和丁酰胆碱酯酶均具有明显的抑制作用,当前胡挥发油浓度为1μL/mL时,其抑制率分别为(63.76±1.99)%和(51.53±1.70)%;其挥发油共鉴定出32种化学成分,主要有α-蒎烯、左旋-β-蒎烯、月桂烯、1-甲基-3-(1-甲基乙基)苯、(R)-1-甲基-4-(1-甲基乙烯基)环己烯、萜品醇、2-羟基-5-甲基苯乙酮等。本研究结果提示前胡有可能对老年痴呆等神经退行性疾病有一定的治疗作用。     

粤东产重瓣臭茉莉叶挥发油化学成分的GC-MS分析

采用水蒸气蒸馏法对粤东产重瓣臭茉莉(Clerodendrum chinense(Lour.)Merr.)挥发油进行提取,并运用CJC-MS对其成分进行分析和鉴定.结果分离出31个峰,确定了31种化合物,按峰面积归一化法计算各组成化合物的相对百分含量.所鉴定化合物的含量占全油的100%,其主要成份1-辛烯-3-醇(蘑菇醇)(49.50%)、(E)-3-已烯-1-醇(青叶醇)(13.39%)、芳樟醇(9.41%)、环已醇(3.37%)、3-辛醇(1.69%)、n-正戊酸-(z)-3-已烯酯(1-42%)、1-已醇(1.38%)、糠醛(1.37%)和α-萜品烯醇(1.17%)等9种化合物占全油的81.53%.     

Chemical composition and antimicrobial activity of the essential oil of Scutellaria barbata

The essential oil of Scutellaria barbata was obtained by hydrodistillation with a 0.3% (v/w) yield and analysed by GC and GC-MS. The main compounds in the oil were hexahydrofarnesylacetone (11.0%), 3,7,11,15-tetramethyl-2-hexadecen-1-ol (7.8%), menthol (7.7%) and 1-octen-3-ol (7.1%). The antimicrobial activity of the oil was evaluated against 17 microorganisms using disc diffusion and broth microdilution methods. The gram-positive bacteria, including methicillin-resistant Staphlococcus aureus, were more sensitive to the oil than gram-negative bacteria and yeasts.     

海南木莲叶挥发油化学成分研究

目的：分析海南木莲叶的挥发油成分。方法：采用水蒸气法提取挥发油,气相色谱-质谱-计算机联用技术分析。结果：共鉴定出49种化合物,占挥发油总量的99．99％,其中主要成分是橙花叔醇（16．44％）;3,7-二甲基-2,6-辛二烯-1-醇（5.27％）;3,7-二甲基1,6-辛二烯-3-醇（5．12％）;α-丁香烯（4．97％）和丁香烯（4．48％）。     

长瓣马铃苣苔挥发油化学成分分析

采用水蒸气蒸馏法提取了长瓣马铃苣苔的挥发油,采用气相色谱-质谱联用法对该挥发油的化学成分进行了分离鉴定,共鉴定出32种化合物,占挥发油总量的80.81%,其主要成分为棕榈酸(35.49%)、11,14-二十碳二烯酸乙酯(23.06%)和1-烯-3-辛醇(5.58%)。     

Analysis of the volatile components of Lavandula canariensis (L.) Mill., a Canary Islands endemic species,growing in Australia

The essential oil of a Canary Islands endemic species, Lavandula canariensis (L.) Mill., gathered from Australia, was extracted by hydrodistillation and solid phase micro-extraction (SPME). The oils have been studied by GC and GC–MS. A total of 38 compounds have been identified in the leaf oil extracted by hydrodistillation, the principal components being carvacrol (23.6%), β-bisabolene (20.8%), (E,E)-α-farnesene (11.3%), β-caryophyllene (7.6%) and carvacrol methyl ether (7.3%), while the oil extracted by SPME showed carvacrol (42.6%) as the principal component with moderate amounts of (E,E)-α-farnesene (9.1%), β-bisabolene (7.5%), cis-hex-3-en-1-ol (5.6%) and carvacrol methyl ether (4.6%). SPME extracts indicated that carvacrol, cis-hex-3-en-1-ol and linalool were in greater concentration in the head space vapours than in the oil. This is the first report describing the essential oil composition of this species.     

Leaf essential oil composition of three species of Myrcianthes from Monteverde, Costa Rica

To examine the chemical diversity of essential oils from Myrcianthes species (Myrtaceae) as well as potential chemotaxonomic relationships between them, the leaf essential oils of M. fragrans (Sw.) McVaugh, M. rhopaloides (Kunth) McVaugh, and an undescribed species, Myrcianthes 'black fruit', from Monteverde, Costa Rica, were isolated by hydrodistillation and analyzed by GC/MS. The most abundant components of the essential oil of M. fragrans were 1,3,5-trimethoxybenzene (15.7%), (Z)-hex-3-en-1-ol (10.0%), alpha-cadinol (10.4%), eudesma-4(15),7-dien-1beta-ol (9.0%), caryophyllene oxide (7.8%), and spathulenol (7.5%). The leaf oils of two different samples of Myrcianthes rhopaloides were quantitatively different with one sample composed mostly of linalool (17.7%), alpha-cadinol (14.4%), spathulenol (11.1%), tau-cadinol (9.6%), and 1-epicubenol (6.9%), and the other was made up largely of (E)-hex-2-enal (46.1%), 1,8-cineole (12.5%), linalool (9.1%), alpha-cadinol (6.7%), and alpha-terpineol (4.4%). The major components in the leaf essential oil of Myrcianthes 'black fruit' were 1,8-cineole (38.3%), alpha-terpineol (21.2%), heptan-2-ol (15.5%), terpinen-4-ol (4.2%), and beta-pinene (3.8%). The leaf oil compositions of Myrcianthes in this study are very different from leaf oils from other members of Myrcianthes reported in the literature. A cluster analysis reveals large chemical variation not only between members of the genus, but also between samples of the same species.     

蒜香藤叶挥发油的化学成分

蒜香藤（Pseudocalymma alliaceum Sandw．）又名紫铃藤,为紫葳科（Bignoniaceae）常绿藤状灌木,原产于南美洲的圭亚那和巴西。蒜香藤花、叶在搓揉之后,有浓浓的大蒜香味,其叶深绿富有光泽,花形大而优美,中国许多地方已引种栽培,一般作为篱笆、围墙美化或凉亭、棚架装饰之用。蒜香藤具有浓郁的蒜香,甚至可作为蒜的替代物用于烹饪。但有关其叶挥发性成分研究尚未见报道。本文利用气相色谱-质谱联用技术（GC—MS）分析了西双版纳植物园引种栽培的蒜香藤叶挥发油的化学成分,以期为合理开发和利用蒜香藤植物资源提供科学依据。     

箭叶橐吾挥发油化学成分的研究

运用气相色谱-质谱-计算机联用技术,结合标准谱库,对青海产箭叶橐吾的挥发油成分进行了研究,分离鉴定了39个化合物,主要成分为2-甲基丁烯酸(5．001％)、顺-β松油醇(2．082％)、反-β-松油醇(4．069％)、4-甲基-1-异丙基-R-3-环己烯-1-醇(15．467％)、十二烷(2．181％)、十四烷(2．276％)、Tau．-Muurolol(3．108％)、α-杜松醇(5．682％)、十六醛(2．266％)、6,10,14-三甲基-2-十五烷酮(3．421％)、三十烷(2．370％)、二十五烷(3．766％)等。     

Insecticidal and synergistic effects of Majorana hortensis essential oil and some of its major constituents

The essential oil from leaves of Majorana hortensis Moench (Lamiaceae) was isolated by hydrodistillation with a yield of 1.6% (wt/wt). The insecticidal activity of the oil was evaluated against fourth instars of Spodoptera littoralis Boisduval (Lepidoptera: Noctuidae) and adults of Aphis fabae L. (Hemiptera: Aphididae). The oil showed a remarkable toxic effect against S. littoralis in a topical application assay (LD₅₀ = 2.48 μg per larva) and in a residual film assay (LC₅₀ = 3.14 g/l). The oil of M. hortensis also exhibited a pronounced toxic effect against A. fabae adults with LC₅₀ values of 1.86 and 2.27 g/l in rapid dipping and residual film assays, respectively. Gas chromatography-mass spectrometry analyses of M. hortensis essential oils revealed the presence of 31 compounds and the main components were terpinen-4-ol (30.0%), γ-terpinene (11.3%), and trans -sabinene hydrate (10.8%). Repeated column chromatography of M. hortensis oil on silica gel led to the isolation of two major constituents, which were characterized based on ¹H-nuclear magnetic resonance and mass spectrometric data, as terpinen-4-ol and γ-terpinene. These two components were examined for their insecticidal and synergistic activities towards S. littoralis and A. fabae . Terpinen-4-ol and γ-terpinene exhibited a significant insecticidal activity against both insects, but γ-terpinene was more toxic than terpinen-4-ol. When tested in a binary mixture with the synthetic insecticides profenofos and methomyl, it was found that both compounds enhanced the insecticidal activity of these insecticides by two- to threefold. These results show that terpinen-4-ol and γ-terpinene have a synergistic effect on the insecticidal activities of synthetic insecticides profenofos and methomyl.     

Repellency of naturally occurring volatile alcohols to fungus gnat Bradysia sp. nr. coprophila (Diptera: Sciaridae) adults under laboratory conditions

This study, conducted under laboratory conditions, was designed to determine the repellent activity of 10 naturally occurring volatile alcohol constituents against adults of the fungus gnat, Bradysia sp. nr. coprophila (Lintner) (Diptera: Sciaridae). The essential oil constituents were octanoic acid, furfural, acetophenone, benzaldehyde, dimethoxybenzene, borneol, menthol, 1-octen-3-ol, and 7-hydroxycitronellol, and alpha-terpineol. alpha-Terpineol, octanoic acid and furfural were tested at several concentrations, whereas the remaining seven were tested at only one concentration. The essential oil constituents' menthol, 1-octen-3-ol, and borneol displayed the most repellent activity. The mean percentage of fungus gnat adults recovered from the test compound petri dishes associated with the three essential oil constituents was between 6 and 15% compared with between 36 and 50% for the petri dishes with distilled water. The mean +/- SEM number of fungus gnat adults present in the sample compartments associated with menthol (10.4 +/- 2.6), 1-octen-3-ol (18.8 +/- 2.4), and borneol (23.4 +/- 5.6) was statistically lower than those in the petri dishes containing distilled water (60.9 +/- 7.4, 49.8 +/- 4.0, and 79.7 +/- 13.5), respectively. Only the highest concentration of alpha-terpineol (8.0 micromol) displayed significant repellent activity against fungus gnat adults. The other essential constituents tested, including octanoic acid (all three concentrations), furfural (both concentrations), acetophenone, dimethoxybenzene, and 7-hydroxycitronellol, were not statistically different from the distilled water control. The results of this study indicate that certain essential oil constituents repel fungus gnat adults, which may be useful, from a practical standpoint, in deterring adults from laying eggs into growing media.