The chemical composition and antimicrobial potential of Cistus munbyi essential oil were studied for the first time. GC and GC–MS analysis revealed 48 compounds representing 96.98% of the oil. Terpinen-4-ol(23.75%), ...The chemical composition and antimicrobial potential of Cistus munbyi essential oil were studied for the first time. GC and GC–MS analysis revealed 48 compounds representing 96.98% of the oil. Terpinen-4-ol(23.75%), meta-Cymene(17.30%), and Sabinene(12.38%)were the major constituents. Antimicrobial activity was evaluated against nine pathogens using the disc diffusion and broth micro-dilution methods. Results show that C.munbyi essential oil possesses strong antimicrobial activity against all strains, regardless if Gram-positive or Gramnegative bacteria, or yeast, with MICs values not exceeding10(mg/ml). In addition to its efficacy, C. munbyi essential oil has an unusual antimicrobial potency which is attributed to its specific chemical composition. Thus, findings presented here suggest that endemic C. munbyi contains a very interesting essential oil that may be valuable in several areas.展开更多
Objective: To evaluate the susceptibility of Mycobacterium aurum and Mycobacterium smegmatis in vitro to the essential oils obtained from two medicinal plants: Thymus satureioides(T. satureioides) and Mentha pulegium(...Objective: To evaluate the susceptibility of Mycobacterium aurum and Mycobacterium smegmatis in vitro to the essential oils obtained from two medicinal plants: Thymus satureioides(T. satureioides) and Mentha pulegium(M. pulegium), and to study their chemical composition.Methods: The aerial parts of T. satureioides and M. pulegium(leaves and stems) were hydro-distillated using a Clevenger-type apparatus and essential oils were analyzed and identified by gas chromatography-mass spectrometry. Antimycobacterial screening of essential oils was performed on the basis of the inhibition zone diameter by disc diffusion method against two mycobacterial strains whereas the minimal inhibitory concentration and minimal bactericidal concentration were determined by using the micro-dilution method.Results: Chemical analysis of their aerial part's essential oils gave as major compounds,borneol(34.26%), carvacrol(31.21%) and thymol(3.71%) for T. satureioides and R(+)-pulegone(75.48%), carvone(6.66%) and dihydrocarvone(4.64%) for M. pulegium.Thereafter their antimycobacterial effect evaluation, using the micro-dilution method,indicated that minimal inhibitory concentration values of T. satureioides essential oil ranged from 0.062% to 0.015%(v/v) and from 0.125% to 0.031%(v/v) for M. pulegium respectively against Mycobacterium aurum and Mycobacterium smegmatis.Conclusions: It is clearly evident from the results obtained that the Moroccan medicinal plants have great potential to be used as anti-tuberculosis agents. These findings may help scientists to undertake several research projects to discover useful natural product as new anti-tuberculosis drug.展开更多
Medicinal plant are grown and produced in different ecosystems and sites under the influence of different potential factors,including the altitude as one of the vital determinants in the quantity and quality of the pl...Medicinal plant are grown and produced in different ecosystems and sites under the influence of different potential factors,including the altitude as one of the vital determinants in the quantity and quality of the plants.One of the species that grows in the highlands is Tanacetum polycephalum,an aromatic perennial of the Asteraceae.This species is characterized to be antiseptic,analgesic,anesthetic,disinfective,expectorant,anti-cancer,anti-allergic,and conducive to low blood pressure.The purpose of this study is to investigate the essential compositions in the aerial parts of T.polycephalum at the time of flowering,and in three different altitudes of the Baladeh region of Nour.Thus,the essential oil was extracted from the aerial parts in the flowering stage of the plant at three altitudes of 1 600,2 400 and 3 200 m using a water distillation method,and the essential oil compositions were identified using GC and GC/MS instruments.One-way ANOVA method was conducted to analyze the obtained data using SPSS,and a Duncan test was administered to compare the means.The results indicated that the essential output obtained from the altitudes of 1 600,2 400 and 3 200 m was(0.74±0.01)%,(1.09±0.02)%,and(1.32±1.2)%,respectively,so that the altitude of 3 200 m revealed the greatest quantity,and the altitude of 1 600 m represented the smallest quantity.Moreover,the essential oil compositions showed the highest percentage in the altitude of 3 200 m and the lowest percentage at the altitude of 1 600 m.The results showed that as the altitude increases,the essential oil compositions revealed the greater quantity and percentage in the aerial parts of T.polycephalum.展开更多
This study was conducted to evaluate the diurnal effect on essential oil yield and composition of Ledum palustre L. grown in northern Inner Mongolia, China. Essential oil content and composition were determined and co...This study was conducted to evaluate the diurnal effect on essential oil yield and composition of Ledum palustre L. grown in northern Inner Mongolia, China. Essential oil content and composition were determined and compared as a function of different harvesting times viz. 7:00 AM, 11:00 AM, 3:00 PM, 7:00 PM, and 11:00 PM within a day. The essential oil obtained by hydrodistillation was investigated by gas chromatography-mass spectrometry (GC-MS). The yield of essential oil was varied from 1.21% to 1.62%;the maximum oil yield was obtained at 3:00 PM and the minimum at 7:00 PM. Similar to oil yield, qualitative difference in essential oil composition of L. palustre was observed. For the best essential oil yields, L. palustre should be harvested during 11:00 AM to 3:00 PM.展开更多
Objective:To determine chemical composition of the hydrodistilled essential oil of Blumea martiniana,and to evaluate its larvicidal activity against Anopheles anthropophagus,the natural vector of malaria.Methods:Chemi...Objective:To determine chemical composition of the hydrodistilled essential oil of Blumea martiniana,and to evaluate its larvicidal activity against Anopheles anthropophagus,the natural vector of malaria.Methods:Chemical composition of essential oils extracted by steam distillation was investigated by gas chromatography and mass spectroscopy（GC-MS）.Larvicidal activity of essential oil and its four main compounds was carried out by WHO method.Twenty larvae of early fourth-instar stage were used in the larvicidal assay and five replicates were maintained for each concentration.The 24 h LC<sub>50</sub> and LC<sub>90</sub> values were determined following probit analysis.Results:Totally 68 compounds corresponding to 98.55%of the total oil were identified and the major constituents of essential oil were:linalool（10.36%）,germacrene D（9.09%）, borneol（6.24%）,γ-terpinene（5.38%）.The oil and linalool,germacrene D,bomeol,γ-terpinene exerted significant larvicidal activity with LC<sub>50</sub> values of 46.86,35.87,44.61,35.89,and 29.21 mg/L, respectively.It also showed a dose dependent effect on mortality.Conclusions:The essential oil of Blumea martiniana and its four major compounds may have potential for use in control of Anopheles anthropophagus larvae and could be useful in search of newer,safer and more effective natural compounds as larvicides.展开更多
Dried leaves of <i><span style="font-family:Verdana;">Eucalyptus</span></i> <i><span style="font-family:Verdana;">camaldulensis</span></i><span st...Dried leaves of <i><span style="font-family:Verdana;">Eucalyptus</span></i> <i><span style="font-family:Verdana;">camaldulensis</span></i><span style="font-family:Verdana;"> were finely grinded and fractionated</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> by sieving into four granulometric classes (<100 μm, 100 - 200 μm, 200 - 355 μm and >355 μm). The obtained powder fractions were used for essential oil (EO) extraction by hydrodistillation and their phytochemical profile and </span><i><span style="font-family:Verdana;">in</span></i> <i><span style="font-family:Verdana;">vitro</span></i><span style="font-family:Verdana;"> antioxidant activities were evaluated. The mother powder (unsieved powder) was used for comparison. Particle size exerted a significant influence (</span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;"> < 0.05) on the phytochemical composition and </span><i><span style="font-family:Verdana;">in</span></i> <i><span style="font-family:Verdana;">vitro</span></i><span style="font-family:Verdana;"> antioxidant prop</span><span><span style="font-family:Verdana;">erties of the EOs. Comparatively, the mother powder had the highest contents of </span><i><span style="font-family:Verdana;">α</span></i><span style="font-family:Verdana;">-pinene (55.6%), camphene (3.4%) and limonene (3.7%), while 1,8-cineole (26.6% and 22.4%), </span></span><span style="font-family:Verdana;">exo-fenchol (5.6% and 3.5%), </span><i><span style="font-family:Verdana;">α</span></i><span style="font-family:Verdana;">-campholenol (4.2% and 3.4%), L-trans-pinocarveol (5.5% and 2.7%), L-borneol (12.6% and 6.8%) and </span><i><span style="font-family:Verdana;">α</span></i><span style="font-family:Verdana;">-terpineol (16.4% and 7.6%) are the main compounds of EOs from the <100 μm and 100 - 200 μm fractions, respectively. The antioxidant activities of the EOs revealed higher radical-scavenging activities DPPH (90.62% and 70.46%) and ABTS (89.59% and 73.31%) for展开更多
The genus Tagetes is a possible source of essential oils for the biorational control of pests and diseases in Mexico. The aim of the present study was to assess the distance between plants (PD;15 × 80, 30 × ...The genus Tagetes is a possible source of essential oils for the biorational control of pests and diseases in Mexico. The aim of the present study was to assess the distance between plants (PD;15 × 80, 30 × 80 and 60 × 80 cm) and urea fertilization (0, 60 and 120 kg·he-1 N) for biomass production and essential oil in Tagetes terniflora HBK. Oil was obtained by the aerial part hydro-distillation and its chemical composition was analyzed by gas chromatography coupled to mass spectrometry. Factors N, PD and their interaction did not change plant height or the number of branches per plant;however, PD factor modified fresh tissue (FW) and dry tissue (DW) weights and the amount of oil per plant (p ≤ 0.05) which represent a good biomass production (30 to 72.5 ton·he-1 FW, 11 to 27 ton·he-1 DW) and oil producing (168 to 383 L·he-1 ) potential in the field. Urea did not have effect on both biomass and oil response per plant but interaction of 15 x 80 DP and 120 N could favor higher biomass and oil production potential (78 ton FW, 28 ton·he-1 DW and 608 L·he-1 , respectively). Essential oil yield varied from 0.3 to 2.1% according to the management conditions. A total of 11 major compounds were identified in essential oil, the relative quantity was constant in different agronomic management factors: E- tagetone (22%), cistagetenone (20.4%), transtagetenone (20.4%), dihydrotagetone (13.4%) and cis-β-ocimene (10.3%), trans-β-ocimene (5.0%), propenyl anisole (4.3%), sphatulenole (1.1%), allyl anisole (0.7%), Z-tagetone (0.5%) and limonene (0.5%).展开更多
The chemical composition of the essential oil obtained by hydrodistillation from the leaves of Phyllanthus reticulatus Poiret (Euphorbiaceae) growing in Nigeria has been studied. The constituents of the oil were analy...The chemical composition of the essential oil obtained by hydrodistillation from the leaves of Phyllanthus reticulatus Poiret (Euphorbiaceae) growing in Nigeria has been studied. The constituents of the oil were analyzed by means of gas chromatography (GC-FID) and gas chromatography coupled with mass spectrometry (GC-MS). Monoterpenes (64.9%) were the dominant class of compounds, followed by sesquiterpenes (23.0%). The major constituents were α-pinene (6.0%), sabinene (7.6%), β-pinene (18.1%), linalool (6.9%) and camphor (7.7%), among the monoterpenes, and β-caryophyllene (11.9%) and germacrene D (8.6%) among the sesquiterpenes. This is the first report on the volatile constituents of Phyllanthus reticulatus.展开更多
The essential oils obtained by hydrodistillation from leaves and flowers of Montanoa speciosa collected in southeastern Mexico (Yucatan) were analyzed by GC-MS. A total of 71 and 79 components, representing 98.44% and...The essential oils obtained by hydrodistillation from leaves and flowers of Montanoa speciosa collected in southeastern Mexico (Yucatan) were analyzed by GC-MS. A total of 71 and 79 components, representing 98.44% and 97.69% of the leaf and flower oils, respectively, were characterized. The main constituents found were β-caryophyllene (20.73%, 17.95%), δ-cadinene (9.88%, 9.28%), caryophyllene oxide (9.48%, 8.68%), and germacrene D (6.94%, 5.85%). The essential oils were screened for their antioxidant potentials by DPPH assay. The leaves oil exhibited higher DPPH scavenging capability (72.85 ± 0.28 mmol TE/g essential oil and 147.83 ± 0.41 mg/mL Vit C/g essential oil) than the floral oil (68.43 ± 0.10 mmol TE/g essential oil and 131.59 ± 0.87 mg/mL Vit C/g essential oil).展开更多
The chemistry of essential obtained from the leaves of Senna podocarpa (Guill. Et Perr.) Lock from Nigeria is being reported. The hydrodistilled oil was analyzed by gas chromatography-flame ionization detector (GC-FID...The chemistry of essential obtained from the leaves of Senna podocarpa (Guill. Et Perr.) Lock from Nigeria is being reported. The hydrodistilled oil was analyzed by gas chromatography-flame ionization detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS) techniques. The main constituents of the oil were 1,2-benzenedicarboxylic acid, mono (2-ethylhexyl) ester phthalate (26.6%) and β-elemene (27.9%). There were significant amounts of caryophyllene oxide (7.3%) and urs-12-en-24-oic acid, 3-oxo-methyl ester (5.5%). The antimicrobial activity of the essential oil was evaluated against a panel of seven bacteria and two fungal strain using agar diffusion and broth microdilution methods. Results had shown that the oil exhibited moderate to strong antimicrobial activity against the tested microorganisms. The activity zones of inhibition (ZI) ranged between 10.0 ± 0.2 mm and 28.3 ± 2.9 mm while the minimum inhibitory concentrations (MIC) ranged between 0.3 mg/mL 5.0 mg/mL, respectively. The chemical constituents and antimicrobial activity of the essential oil of Senna podocarpa were being reported for the first time.展开更多
The flowers of ZhaoFen and RouFurong may contain essential oils with natural aromatic ingredients. In the present work, the chemical compositions of essential oil of Paeonia suffruticosa Andrews from the flowers of Zh...The flowers of ZhaoFen and RouFurong may contain essential oils with natural aromatic ingredients. In the present work, the chemical compositions of essential oil of Paeonia suffruticosa Andrews from the flowers of ZhaoFen and RouFurong grown only in China were investigated by GC-MS analysis. The results indicate that there are 27 constituents in ZhaoFen and 29 constituents in RouFurong, which account for 96.04% and 95.90% of the oils of ZhaoFen and RouFurong, respectively. The major components of the essential oils are character-rized by oxygenated terpenols, and their content is, respectively, 85.06% and 83.47%. The essential oil of Paeonia suffruticosa Andrews was reported for the first time on the aerial parts.展开更多
基金supported by the Ministry of Higher Education and Scientific Research of People’s Democratic Republic of Algeria(Grant No.F02020110081)
文摘The chemical composition and antimicrobial potential of Cistus munbyi essential oil were studied for the first time. GC and GC–MS analysis revealed 48 compounds representing 96.98% of the oil. Terpinen-4-ol(23.75%), meta-Cymene(17.30%), and Sabinene(12.38%)were the major constituents. Antimicrobial activity was evaluated against nine pathogens using the disc diffusion and broth micro-dilution methods. Results show that C.munbyi essential oil possesses strong antimicrobial activity against all strains, regardless if Gram-positive or Gramnegative bacteria, or yeast, with MICs values not exceeding10(mg/ml). In addition to its efficacy, C. munbyi essential oil has an unusual antimicrobial potency which is attributed to its specific chemical composition. Thus, findings presented here suggest that endemic C. munbyi contains a very interesting essential oil that may be valuable in several areas.
基金Supported by the Cooperation for Innovation in the Agro-Food Domain Project within the 7th Research and Development Framework Programme FP7-INCO-2013-9(Grant agreement number 609495)
文摘Objective: To evaluate the susceptibility of Mycobacterium aurum and Mycobacterium smegmatis in vitro to the essential oils obtained from two medicinal plants: Thymus satureioides(T. satureioides) and Mentha pulegium(M. pulegium), and to study their chemical composition.Methods: The aerial parts of T. satureioides and M. pulegium(leaves and stems) were hydro-distillated using a Clevenger-type apparatus and essential oils were analyzed and identified by gas chromatography-mass spectrometry. Antimycobacterial screening of essential oils was performed on the basis of the inhibition zone diameter by disc diffusion method against two mycobacterial strains whereas the minimal inhibitory concentration and minimal bactericidal concentration were determined by using the micro-dilution method.Results: Chemical analysis of their aerial part's essential oils gave as major compounds,borneol(34.26%), carvacrol(31.21%) and thymol(3.71%) for T. satureioides and R(+)-pulegone(75.48%), carvone(6.66%) and dihydrocarvone(4.64%) for M. pulegium.Thereafter their antimycobacterial effect evaluation, using the micro-dilution method,indicated that minimal inhibitory concentration values of T. satureioides essential oil ranged from 0.062% to 0.015%(v/v) and from 0.125% to 0.031%(v/v) for M. pulegium respectively against Mycobacterium aurum and Mycobacterium smegmatis.Conclusions: It is clearly evident from the results obtained that the Moroccan medicinal plants have great potential to be used as anti-tuberculosis agents. These findings may help scientists to undertake several research projects to discover useful natural product as new anti-tuberculosis drug.
基金supported by the research fund from the Research Deputy section
文摘Medicinal plant are grown and produced in different ecosystems and sites under the influence of different potential factors,including the altitude as one of the vital determinants in the quantity and quality of the plants.One of the species that grows in the highlands is Tanacetum polycephalum,an aromatic perennial of the Asteraceae.This species is characterized to be antiseptic,analgesic,anesthetic,disinfective,expectorant,anti-cancer,anti-allergic,and conducive to low blood pressure.The purpose of this study is to investigate the essential compositions in the aerial parts of T.polycephalum at the time of flowering,and in three different altitudes of the Baladeh region of Nour.Thus,the essential oil was extracted from the aerial parts in the flowering stage of the plant at three altitudes of 1 600,2 400 and 3 200 m using a water distillation method,and the essential oil compositions were identified using GC and GC/MS instruments.One-way ANOVA method was conducted to analyze the obtained data using SPSS,and a Duncan test was administered to compare the means.The results indicated that the essential output obtained from the altitudes of 1 600,2 400 and 3 200 m was(0.74±0.01)%,(1.09±0.02)%,and(1.32±1.2)%,respectively,so that the altitude of 3 200 m revealed the greatest quantity,and the altitude of 1 600 m represented the smallest quantity.Moreover,the essential oil compositions showed the highest percentage in the altitude of 3 200 m and the lowest percentage at the altitude of 1 600 m.The results showed that as the altitude increases,the essential oil compositions revealed the greater quantity and percentage in the aerial parts of T.polycephalum.
文摘This study was conducted to evaluate the diurnal effect on essential oil yield and composition of Ledum palustre L. grown in northern Inner Mongolia, China. Essential oil content and composition were determined and compared as a function of different harvesting times viz. 7:00 AM, 11:00 AM, 3:00 PM, 7:00 PM, and 11:00 PM within a day. The essential oil obtained by hydrodistillation was investigated by gas chromatography-mass spectrometry (GC-MS). The yield of essential oil was varied from 1.21% to 1.62%;the maximum oil yield was obtained at 3:00 PM and the minimum at 7:00 PM. Similar to oil yield, qualitative difference in essential oil composition of L. palustre was observed. For the best essential oil yields, L. palustre should be harvested during 11:00 AM to 3:00 PM.
基金Supported by the National Natural Science Foundation of China (50676041)financial support provided by the National Natural Science Foundation of China (20676041)
文摘Objective:To determine chemical composition of the hydrodistilled essential oil of Blumea martiniana,and to evaluate its larvicidal activity against Anopheles anthropophagus,the natural vector of malaria.Methods:Chemical composition of essential oils extracted by steam distillation was investigated by gas chromatography and mass spectroscopy（GC-MS）.Larvicidal activity of essential oil and its four main compounds was carried out by WHO method.Twenty larvae of early fourth-instar stage were used in the larvicidal assay and five replicates were maintained for each concentration.The 24 h LC<sub>50</sub> and LC<sub>90</sub> values were determined following probit analysis.Results:Totally 68 compounds corresponding to 98.55%of the total oil were identified and the major constituents of essential oil were:linalool（10.36%）,germacrene D（9.09%）, borneol（6.24%）,γ-terpinene（5.38%）.The oil and linalool,germacrene D,bomeol,γ-terpinene exerted significant larvicidal activity with LC<sub>50</sub> values of 46.86,35.87,44.61,35.89,and 29.21 mg/L, respectively.It also showed a dose dependent effect on mortality.Conclusions:The essential oil of Blumea martiniana and its four major compounds may have potential for use in control of Anopheles anthropophagus larvae and could be useful in search of newer,safer and more effective natural compounds as larvicides.
文摘Dried leaves of <i><span style="font-family:Verdana;">Eucalyptus</span></i> <i><span style="font-family:Verdana;">camaldulensis</span></i><span style="font-family:Verdana;"> were finely grinded and fractionated</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> by sieving into four granulometric classes (<100 μm, 100 - 200 μm, 200 - 355 μm and >355 μm). The obtained powder fractions were used for essential oil (EO) extraction by hydrodistillation and their phytochemical profile and </span><i><span style="font-family:Verdana;">in</span></i> <i><span style="font-family:Verdana;">vitro</span></i><span style="font-family:Verdana;"> antioxidant activities were evaluated. The mother powder (unsieved powder) was used for comparison. Particle size exerted a significant influence (</span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;"> < 0.05) on the phytochemical composition and </span><i><span style="font-family:Verdana;">in</span></i> <i><span style="font-family:Verdana;">vitro</span></i><span style="font-family:Verdana;"> antioxidant prop</span><span><span style="font-family:Verdana;">erties of the EOs. Comparatively, the mother powder had the highest contents of </span><i><span style="font-family:Verdana;">α</span></i><span style="font-family:Verdana;">-pinene (55.6%), camphene (3.4%) and limonene (3.7%), while 1,8-cineole (26.6% and 22.4%), </span></span><span style="font-family:Verdana;">exo-fenchol (5.6% and 3.5%), </span><i><span style="font-family:Verdana;">α</span></i><span style="font-family:Verdana;">-campholenol (4.2% and 3.4%), L-trans-pinocarveol (5.5% and 2.7%), L-borneol (12.6% and 6.8%) and </span><i><span style="font-family:Verdana;">α</span></i><span style="font-family:Verdana;">-terpineol (16.4% and 7.6%) are the main compounds of EOs from the <100 μm and 100 - 200 μm fractions, respectively. The antioxidant activities of the EOs revealed higher radical-scavenging activities DPPH (90.62% and 70.46%) and ABTS (89.59% and 73.31%) for
文摘The genus Tagetes is a possible source of essential oils for the biorational control of pests and diseases in Mexico. The aim of the present study was to assess the distance between plants (PD;15 × 80, 30 × 80 and 60 × 80 cm) and urea fertilization (0, 60 and 120 kg·he-1 N) for biomass production and essential oil in Tagetes terniflora HBK. Oil was obtained by the aerial part hydro-distillation and its chemical composition was analyzed by gas chromatography coupled to mass spectrometry. Factors N, PD and their interaction did not change plant height or the number of branches per plant;however, PD factor modified fresh tissue (FW) and dry tissue (DW) weights and the amount of oil per plant (p ≤ 0.05) which represent a good biomass production (30 to 72.5 ton·he-1 FW, 11 to 27 ton·he-1 DW) and oil producing (168 to 383 L·he-1 ) potential in the field. Urea did not have effect on both biomass and oil response per plant but interaction of 15 x 80 DP and 120 N could favor higher biomass and oil production potential (78 ton FW, 28 ton·he-1 DW and 608 L·he-1 , respectively). Essential oil yield varied from 0.3 to 2.1% according to the management conditions. A total of 11 major compounds were identified in essential oil, the relative quantity was constant in different agronomic management factors: E- tagetone (22%), cistagetenone (20.4%), transtagetenone (20.4%), dihydrotagetone (13.4%) and cis-β-ocimene (10.3%), trans-β-ocimene (5.0%), propenyl anisole (4.3%), sphatulenole (1.1%), allyl anisole (0.7%), Z-tagetone (0.5%) and limonene (0.5%).
文摘The chemical composition of the essential oil obtained by hydrodistillation from the leaves of Phyllanthus reticulatus Poiret (Euphorbiaceae) growing in Nigeria has been studied. The constituents of the oil were analyzed by means of gas chromatography (GC-FID) and gas chromatography coupled with mass spectrometry (GC-MS). Monoterpenes (64.9%) were the dominant class of compounds, followed by sesquiterpenes (23.0%). The major constituents were α-pinene (6.0%), sabinene (7.6%), β-pinene (18.1%), linalool (6.9%) and camphor (7.7%), among the monoterpenes, and β-caryophyllene (11.9%) and germacrene D (8.6%) among the sesquiterpenes. This is the first report on the volatile constituents of Phyllanthus reticulatus.
文摘The essential oils obtained by hydrodistillation from leaves and flowers of Montanoa speciosa collected in southeastern Mexico (Yucatan) were analyzed by GC-MS. A total of 71 and 79 components, representing 98.44% and 97.69% of the leaf and flower oils, respectively, were characterized. The main constituents found were β-caryophyllene (20.73%, 17.95%), δ-cadinene (9.88%, 9.28%), caryophyllene oxide (9.48%, 8.68%), and germacrene D (6.94%, 5.85%). The essential oils were screened for their antioxidant potentials by DPPH assay. The leaves oil exhibited higher DPPH scavenging capability (72.85 ± 0.28 mmol TE/g essential oil and 147.83 ± 0.41 mg/mL Vit C/g essential oil) than the floral oil (68.43 ± 0.10 mmol TE/g essential oil and 131.59 ± 0.87 mg/mL Vit C/g essential oil).
文摘The chemistry of essential obtained from the leaves of Senna podocarpa (Guill. Et Perr.) Lock from Nigeria is being reported. The hydrodistilled oil was analyzed by gas chromatography-flame ionization detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS) techniques. The main constituents of the oil were 1,2-benzenedicarboxylic acid, mono (2-ethylhexyl) ester phthalate (26.6%) and β-elemene (27.9%). There were significant amounts of caryophyllene oxide (7.3%) and urs-12-en-24-oic acid, 3-oxo-methyl ester (5.5%). The antimicrobial activity of the essential oil was evaluated against a panel of seven bacteria and two fungal strain using agar diffusion and broth microdilution methods. Results had shown that the oil exhibited moderate to strong antimicrobial activity against the tested microorganisms. The activity zones of inhibition (ZI) ranged between 10.0 ± 0.2 mm and 28.3 ± 2.9 mm while the minimum inhibitory concentrations (MIC) ranged between 0.3 mg/mL 5.0 mg/mL, respectively. The chemical constituents and antimicrobial activity of the essential oil of Senna podocarpa were being reported for the first time.
文摘The flowers of ZhaoFen and RouFurong may contain essential oils with natural aromatic ingredients. In the present work, the chemical compositions of essential oil of Paeonia suffruticosa Andrews from the flowers of ZhaoFen and RouFurong grown only in China were investigated by GC-MS analysis. The results indicate that there are 27 constituents in ZhaoFen and 29 constituents in RouFurong, which account for 96.04% and 95.90% of the oils of ZhaoFen and RouFurong, respectively. The major components of the essential oils are character-rized by oxygenated terpenols, and their content is, respectively, 85.06% and 83.47%. The essential oil of Paeonia suffruticosa Andrews was reported for the first time on the aerial parts.
