scholarly journals Essential oil Composition of Dendropanax Gonatopodus from Monteverde, Costa Rica. An ab Initio Examination of Aromadendrane Sesquiterpenoids

2008 ◽  
Vol 3 (9) ◽  
pp. 1934578X0800300 ◽  
Author(s):  
William N. Setzer
Keyword(s):  
Costa Rica ◽  
Chemical Composition ◽  
Essential Oil ◽  
Ab Initio ◽  
Density Functional ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Hartree Fock ◽  
Leaf Oil ◽  
Leaf Essential Oil

The leaf essential oil of Dendropanax gonatopodus from Monteverde, Costa Rica, has been obtained by hydrodistillation and the chemical composition determined by GC-MS. The major components in the leaf oil were ( E)-2-hexenal (16.9%), terpinolene (14.8%), δ-cadinene (13.5%), ( E)-caryophyllene (9.9%), and α-copaene (7.3%). Minor amounts of the aromadendrane sesquiterpenoids aromadendrene (0.3%), alloaromadendrene (0.3%), spathulenol (0.6%) and globulol (0.6%) were also detected. An ab initio investigation of the aromadendrane sesquiterpenoids has been carried out using both density functional (B3LYP/6-31G*) and post Hartree-Fock (MP2/6-31G**) methods. The calculated relative energies of the aromadendranes belie their relative concentrations generally observed in essential oil compositions.

scholarly journals Leaf Essential Oil Composition of Five Species of Beilschmiedia from Monteverde, Costa Rica

2007 ◽  
Vol 2 (1) ◽  
pp. 1934578X0700200 ◽  
Author(s):  
William N. Setzer ◽  
William A. Haber
Keyword(s):  
Costa Rica ◽  
Essential Oil ◽  
Carbonyl Compounds ◽  
Essential Oil Composition ◽  
Chemical Compositions ◽  
Oil Composition ◽  
Germacrene D ◽  
Leaf Oil ◽  
Leaf Essential Oil ◽  
Cis And Trans

The leaf essential oils of five species of Beilschmiedia from Monteverde, Costa Rica (Beilschmiedia alloiophylla, B. brenesii, B. costaricensis, B. tilaranensis, and an undescribed Beilschmiedia species “chancho blanco”) have been obtained by hydrodistillation and analyzed by GC-MS in order to discern the differences and similarities between the volatile chemical compositions of these species. The principal constituents of B. alloiophylla leaf oil were germacrene D (18.9%), cis- and trans-β-ocimene (18.8% and 9.3%, respectively), α-pinene (11.8%), and bicyclogermacrene (9.1%). The leaf oil of B. brenesii was composed largely of the sesquiterpenes germacrene D (19.3%), β-caryophyllene (13.4%), α-copaene (9.0%), α-humulene (8.1%), and δ-cadinene (5.8%), and the carbonyl compounds 2-undecanone (12.8%), trans-2-hexenal (8.8%), and 2-tridecanone (3.8%). α-Bisabolol (72.1%) dominated the leaf oil of B. costaricensis, while B. tilaranensis had germacrene D (54.9%), β-caryophyllene (14.8%), and δ-cadinene (5.1%) as major components. Beilschmiedia “chancho blanco” leaf oil was composed largely of β-caryophyllene (16.6%), bicyclogermacrene (14.1%), and α-pinene (12.1%).

scholarly journals Variation of essential oil composition of Eucalyptus camaldulensis (myrtaceae) from the Montengero coastline

2010 ◽  
pp. 151-158 ◽  
Author(s):  
Slavenko Grbovic ◽  
Dejan Orcic ◽  
Maria Couladis ◽  
Emilija Jovin ◽  
Dusan Bugarin ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Eucalyptus Camaldulensis ◽  
Essential Oil Composition ◽  
Oil Yield ◽  
Oil Composition ◽  
Oxygenated Monoterpenes ◽  
Sesquiterpene Alcohol ◽  
Major Class ◽  
Leaf Essential Oil

In the current study the essential oil obtained from the leaves of Eucalyptus camaldulensis plants collected from five localities of the Montenegro coastline was analyzed. The oil yield varied from 0.63 % (Kotor) up to 1.59% (Tivat). The chemical composition of the leaf essential oil was analyzed using GC-MS technique. Monoterpene hydrocarbons were a major class of compounds. Among them, dominant compounds were p-cymene (17.38-28.60%), ?-phellandrene (12.35-14.47%) and ?-pinene (0.94-11.48%). The second largest group was oxygenated monoterpenes with cryptone (4.97-7.25) and terpinene-4-ol (2.75-4.21%) as predominant. Besides high content of sesquiterpene alcohol spathulenol (7.83-14.15%) was found. According to the results obtained E. camaldulensis from Montenegro can be classified in the chemotype with low 1,8-cineole and high p-cymene and cryptone ratio.

Leaf Essential Oil Composition of Three Species ofMyrcianthesfrom Monteverde, Costa Rica

2008 ◽  
Vol 5 (7) ◽  
pp. 1327-1334 ◽  
Author(s):  
Ramona A. Cole ◽  
William A. Haber ◽  
Robert O. Lawton ◽  
William N. Setzer
Keyword(s):  
Costa Rica ◽  
Essential Oil ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Leaf Essential Oil

scholarly journals Essential Oil Composition and Antibacterial Activity of Monticalia greenmaniana (Asteraceae)

2012 ◽  
Vol 7 (2) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
José Cárdenas ◽  
Janne Rojas ◽  
Luís Rojas-Fermin ◽  
María Lucena ◽  
Alexis Buitrago
Keyword(s):  
Antibacterial Activity ◽  
Essential Oil ◽  
Mass Spectra ◽  
Essential Oil Composition ◽  
Gram Negative Bacteria ◽  
Oil Composition ◽  
Aerial Parts ◽  
Germacrene D ◽  
Leaf Oil ◽  
Leaf Essential Oil

The essential oils from fresh aerial parts of Monticalia greenmaniana (Hieron) C. Jeffrey (Asteraceae) collected in March, were analyzed by GC/MS. Oil yields (w/v) of 0.1% (flowers), 0.07%, (stems) and 0.1% (leaves) were obtained by hydrodistillation. Thirteen, sixteen and eighteen components, respectively, were identified by comparison of their mass spectra with those in the Wiley GC-MS Library data base. The major components of the flower and stem oils were 1-nonane (38.8% flowers; 33.5% stems), α-pinene (29.0% flowers; 14.8% stems) and germacrene D (15.6% flowers; 18.6% stems). However, in the leaf oil, germacrene D was observed at 50.7%, followed by β-cedrene at 8.4 %. The leaf essential oil showed a broad spectrum of antibacterial activity against the important human pathogenic Gram-positive and Gram-negative bacteria Staphylococcus aureus (ATCC 25923), Enterococcus faecalis (ATCC 19433), Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853) and Klebsiella pneumoniae (ATCC 25955) with MIC values ranging from 75 to 6000 ppm.

scholarly journals Seasonal Variation in the Leaf Essential Oil Composition of Sassafras Albidum

2008 ◽  
Vol 3 (5) ◽  
pp. 1934578X0800300 ◽  
Author(s):  
Kristi M. Kaler ◽  
William N. Setzer
Keyword(s):  
Seasonal Variation ◽  
Chemical Composition ◽  
Essential Oil ◽  
General Trend ◽  
Growing Season ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Sassafras Albidum ◽  
Leaf Essential Oil ◽  
Individual Trees

The seasonal variation in the chemical composition of the leaf essential oil of Sassafras albidum has been analyzed by GC-MS. Three individual trees were sampled four times during the course of the growing season. The leaf oils were made up of 44 components, with geranial (11%–27%) and neral (10%–18%) dominating. S. albidum showed a general trend of diminishing monoterpenoid concentrations and increasing sesquiterpenoid concentrations during the season.

scholarly journals Leaf Essential Oil of Manekia naranjoana (Piperaceae) from Costa Rica and its Cytotoxic Activity

2011 ◽  
Vol 6 (1) ◽  
pp. 1934578X1100600 ◽  
Author(s):  
Carlos Chaverri ◽  
Cecilia Díaz ◽  
José F. Cicció
Keyword(s):  
Costa Rica ◽  
Chemical Composition ◽  
Essential Oil ◽  
Tumor Cell ◽  
Cytotoxic Activity ◽  
Tumor Cell Lines ◽  
Capillary Gc ◽  
Leaf Oil ◽  
Leaf Essential Oil ◽  
Low Toxicity

The chemical composition of the leaf oil of Manekia naranjoana (C. DC.) Callejas (Piperaceae) from Costa Rica was analyzed by capillary GC/FID and GC/MS. Fifty-five compounds were identified. Major compounds from the leaf oil were β-pinene (30.6%), α-pinene (18.8%), limonene (13.7%), and β-caryophyllene (6.1%). The oil presented very low toxicity to tumor and non-tumor cell lines, even though it contains components, such as α- and β-pinene, limonene and others, which have been shown to be cytotoxic. This is the first report of the chemical composition of the essential oil obtained from this species.

scholarly journals Chemical Composition and Cytotoxic Activity of the Leaf Essential Oil of Ocotea tonduzii from Monteverde, Costa Rica

2007 ◽  
Vol 2 (7) ◽  
pp. 1934578X0700200 ◽  
Author(s):  
Anita Bansal ◽  
Debra M. Moriarity ◽  
Sayaka Takaku ◽  
William N. Setzer
Keyword(s):  
Costa Rica ◽  
Chemical Composition ◽  
Essential Oil ◽  
Cytotoxic Activities ◽  
Germacrene D ◽  
Leaf Oil ◽  
Leaf Essential Oil ◽  
Oil Components ◽  
Mcf 7

The leaf essential oil of Ocotea tonduzii from Monteverde, Costa Rica has been obtained by hydrodistillation and analyzed by GC-MS. The principal constituents of O. tonduzii leaf oil were the monoterpenes α-pinene (41.4%) and pinene (25.1%) and the sesquiterpenes α-humulene (6.9%), β-caryophyllene (5.8%), and germacrene D (3.8%). O. tonduzii leaf oil was notably cytotoxic on MCF-7, MDA-MB-231, MDA-MB-468, and UACC-257 cells in vitro. The major essential oil components showed cytotoxic activities comparable to doxorubicin ( LC50, 20–70 μg/mL).

scholarly journals Seasonal Variation in the Leaf Essential Oil Composition of Zanthoxylum clava-herculis growing in Huntsville, Alabama

2010 ◽  
Vol 5 (3) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Lauren C. Eiter ◽  
Henry Fadamiro ◽  
William N. Setzer
Keyword(s):  
Seasonal Variation ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Growing Season ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Monoterpene Hydrocarbons ◽  
Leaf Essential Oil ◽  
Individual Trees

The seasonal variation in the chemical composition of the leaf essential oil of Zanthoxylum clava-herculis has been analyzed by GC-MS. Three individual trees were sampled four times during the course of the 2004 growing season. Notable differences were recorded in the essential oil yields from the three trees on the four collection dates; yields were highest in May and lowest in July The leaf essential oils were made up of 25 components, largely menthane monoterpenoids, dominated by limonene (44-73%) and 1,8-cineole (16-43%), with lesser amounts of α-thujene, linalool, γ-terpinene, and α-terpineol. The ratio of oxygenated monoterpenoids to monoterpene hydrocarbons generally increased during the season, largely reflected in the 1,8-cineole/limonene ratio.

scholarly journals Chemical Composition of the Leaf Essential Oil of Casimiroa Edulis La Llave & Lex. (Rutaceae) from Monteverde, Costa Rica

2009 ◽  
Vol 4 (3) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Sarah L. Miller ◽  
William A. Haber ◽  
William N. Setzer
Keyword(s):  
Costa Rica ◽  
Chemical Composition ◽  
Essential Oil ◽  
Traditional Use ◽  
Sesquiterpene Hydrocarbons ◽  
Germacrene D ◽  
Casimiroa Edulis ◽  
Leaf Oil ◽  
Leaf Essential Oil

The leaf essential oil of Casimiroa edulis (Rutaceae), collected from Monteverde, Costa Rica, has been obtained by hydrodistillation and analyzed by GC-MS. The leaf oil was dominated by sesquiterpene hydrocarbons, predominately germacrene D (16-22%) and ( E)-caryophyllene (16-17%), consistent with the traditional use of this plant as a sedative, sleep inducer and hypotensive.

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