scholarly journals Chemical constituents and antimicrobial activity of essential oils of Ammodaucus leucotricus

2017 ◽  
Vol 10 ◽  
pp. S2476-S2478 ◽  
Author(s):  
Noureddine Gherraf ◽  
Amar Zellagui ◽  
Azeddine Kabouche ◽  
Mesbah Lahouel ◽  
Ramdane Salhi ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Chemical Constituents

scholarly journals Chemical Constituents and Antimicrobial Activity of Essential Oils of (Annonaceae) from Sarawak

2013 ◽  
Vol 4 (1) ◽  
pp. 48-48
Author(s):  
Fasihuddin B. Ahmad ◽  
Zaini B Assim ◽  
Ismail B. Jusoh ◽  
Hamzah Mohd. Salleh ◽  
Laily B. Din
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Chemical Constituents

Antimicrobial Activity and Chemical Constituents of the Essential Oils from Root, Leaf and Aerial Part ofNepeta asterotrichafrom Iran

2014 ◽  
Vol 17 (3) ◽  
pp. 415-421 ◽  
Author(s):  
Elham Ezzatzadeh ◽  
Somayyeh Fallah Iri Sofla ◽  
Ehsan Pourghasem ◽  
Abdolhossein Rustaiyan ◽  
Abbas Zarezadeh
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Aerial Part ◽  
Chemical Constituents

scholarly journals Antimicrobial Activity and Chemical Constituents of the Essential Oils from Flower, Leaf and Stem of Gypsophila bicolor from Iran

2011 ◽  
Vol 6 (2) ◽  
pp. 1934578X1100600
Author(s):  
Ali Shafaghat ◽  
Masoud Shafaghatlonbar
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Chemical Constituents ◽  
Substantial Effect ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Germacrene D ◽  
Leaf Oil ◽  
Moderate Effect ◽  
Main Components

The volatile constituents from flower, leaf and stem of Gypsophila bicolor growing in Iran were obtained by hydrodistillation and analyzed by GC and GC/MS. The flower oil was characterized by high amounts of germacrene-D (21.2%), p-cymene (20.6%), bicyclogermacrene (17.6%), γ-dodecadienolactone (13.7%) and terpinolene (9.4%). Twenty-four constituents representing 97.4% of the leaf oil were identified of which germacrene-D (23.4%), terpinolene (14.5%), bicyclogermacrene (7.5%), γ-dodecadienolactone (6.8%), p-cymene (6.7%) and cis-β-ocimene (6.3%) were major components. The main components of the stem oil were γ-dodecadienolactone (28.5%), bicyclogermacrene (14.8%), germacrene-D (12.6%), p-cymene (12.5%), terpinolene (11.6%) and trans-β-ocimene (4.2%). The antimicrobial effects of flower, leaf and stem essential oils from Gypsophila bicolor were studied according to the agar diffusion cup method. The essential oils had a moderate effect on the Gram-positive and Gram-negative bacteria, but had a substantial effect on the fungi studied.

scholarly journals Antimicrobial activity and chemical constituents of essential oils and oleoresins extracted from eight pepper species

2017 ◽  
Vol 47 (5) ◽  
Author(s):  
Laira Martinelli ◽  
Jessica Miranda Rosa ◽  
Carolina dos Santos Bragine Ferreira ◽  
Gustavo Marcelo da Luz Nascimento ◽  
Mateus Silveira Freitas ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Chemical Constituents ◽  
Piper Nigrum ◽  
Aromatic Plants ◽  
Schinus Terebinthifolius ◽  
Antibacterial And Antifungal Activities ◽  
Biotechnological Processes ◽  
Pimenta Dioica ◽  
Antibacterial And Antifungal

ABSTRACT: Essential oils are the most important compounds produced during secondary metabolism in aromatic plants. Essential oils are volatile, have characteristic odor and are used as defensive agents by plants. In pepper, it is possible to say that essential oils are the “flavor fingerprint” of each species. In the present article, eight species of pepper were studied in order to extract their essential oils and oleoresins, test their antibacterial and antifungal activities and also to identify the compounds present in the most bioactive samples. Results demonstrated that two essential oils [Pimenta dioica (L.) Merr. and Schinus terebinthifolius] and three oleoresins (Schinus terebinthifolius and Piper nigrum white and black) recorded significant antimicrobial activity. These active essential oils and oleoresins are interesting for use in biotechnological processes employed in food, pharmaceutical and other industries.

scholarly journals Evaluation of the chemical compositions, larvicidal and antimicrobial efficacies of Zingiber castaneum and Zingiber nitens essential oils

2019 ◽  
Author(s):  
Le T. Huong ◽  
Trinh T Huong ◽  
Nguyen T. Bich ◽  
Nguyen T. Viet ◽  
Isiaka Ajani Ogunwande
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Inhibitory Concentration ◽  
Chemical Constituents ◽  
Antimicrobial Activities ◽  
Bornyl Acetate ◽  
Chemical Compositions ◽  
Germacrene D ◽  
Leaf Oil ◽  
Significant Mortality

Abstract In this paper, we report the chemical constituents, larvicidal and antimicrobial activities of essential oils from Zingiber castaneum Škorničk. & Q.B. Nguyễn and Zingiber nitens M.F. Newman growing in Vietnam. The main constituents of Z. castaneum leaf were bicyclogermacrene (24.8%), germacrene D (12.9%), cis -β-elemene (11.2%) and β-pinene (10.3%), while the pseudo-stem contained bicyclogermacrene (15.8%), cis -β-elemene (9.8%) and germacrene D (9.2%). The significant compound of the rhizome oil was sabinene (22.9%), along with α-pinene (7.8%), β-pinene (6.5%), bornyl acetate (6.1%) and γ-terpinene (5.5%). However, β-pinene (45.8%), α-pinene (10.7%) and bicyclogermacrene (7.8%) were the dominant compounds in the leaf oil of Z. nitens . Terpinen-4-ol (77.9%) occurred as the compound occurring in higher amount in the rhizome oil. The rhizome oil of Z. castaneum exhibited 100% mortality towards Ae. aegypti (concentration, 200 µg/mL; 24 h and 48 h) and Ae. albopictus (concentration, 100 µg/mL; 24 h and 48 h). However, mortality of 81.3% was observed against Cx. quinquefasciatus at 48 h (concentration 100 µg/mL). The leaf also exhibited 100% mortality against Ae. aegypti (concentration, 100 µg/mL; 24 h and 48 h) and Cx. quinquefasciatus (concentration, 150 µg/mL; 24 h and 48 h). The rhizome oil displayed a minimum lethal concentration LC 50 of 121.43 µg/mL and 110.31 µg/mL against Ae. aegypti respectively at 24 h and 48 h while values of 49.85 µg/mL and 43.93 µg/mL at 24 h and 48 h were observed against Ae. albopictus respectively. In addition, LC 50 values of 88.86 µg/mL and 48.08 µg/mL were recorded respectively against Cx. quinquefasciatus . Also, the leaf oil displayed significant larvicidal activity against Ae. aegypti with LC 50 of 39.30 µg/mL (24 h) and 31.78 µg/mL (48 h) while LC 50 values of 84.97 µg/mL (24 h) and 47.40 µg/mL (48 h) were recorded respectively against Cx. quinquefasciatus . The leaf oil of Z. nitens exhibited 100% mortality against Ae. aegypti at 24 h and 48 h period (concentration 50 µg/mL) while the rhizome oil displayed maximum mortality at concentration of 100 µg/mL. The rhizome oil attained only mortality of 93% against Cx. quinquefasciatus at test period. No significant mortality was recorded against Cx. quinquefasciatus by the leaf oil. The LC 50 values of 17.58 µg/mL (24 h) and 15.12 µg/mL (48 h) were displayed by the leaf oil against Ae. aegypti while values of 29.60 µg/mL (24 h) and 26.21 (48 h) were exhibited by the rhizome oil. Only the rhizome oil was toxic against Cx. quinquefasciatus with LC 50 of of 64.18 µg/mL (24 h) and 59.06 µg/mL (48 h). The pseudo-stem oil of Z. castaneum inhibited the growth of Pseudomonas aeruginosa (ATCC 25923) with minimum inhibitory concentration (MIC) of 12.5 µg/mL, while all other tested samples recorded MIC of 50 µg/mL. However, only the pseudo-stem oil of Z. castaneum displayed antimicrobial activity against Aspergillus niger (ATCC 9763) and Fusarium oxysporum (ATCC 48112) with MIC of 50 µg/mL.

scholarly journals Antimicrobial activity of the essential oils from the leaves and stems of Amomum rubidumLamxay & N. S. Lý

2021 ◽  
Vol 20 (1) ◽  
pp. 81-89
Author(s):  
Le T Huong ◽  
◽  
Nguyen T Viet ◽  
Ly N Sam ◽  
Cao N Giang ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Essential Oil ◽  
Essential Oils ◽  
National Park ◽  
Chemical Constituents ◽  
Chemical Compositions ◽  
Leaf Essential Oil ◽  
Microdilution Broth ◽  
Susceptibility Assay

This paper described the chemical compositions and antimicrobial activity of the essential oils from the leaves and stem of Amomum rubidumLamxay & N. S. Lý, collected from Bidoup Nui Ba National Park, Lam Dong, Vietnam. The essential oils were obtained by hydrodisitllation method while antimicrobial activity was evaluetd by microdilution broth susceptibility assay. The main constituents of the leaf essential oil were identified as 1,8-cineole (37.7%), -3-carene (19.5%) and limonene (16.3%) while -3-carene (21.9%), limonene (17.8%) and β-phellandrene (14.6%) dominated in the stem essentialoil. The leaf and stem essential oils displayed stronger inhibition of Pseudomonas aeruginosawith MIC of 25 μg/mLand 50 μg/mLrespectively. The stem essential oil was active against Candida albicans(MIC, 50 μg/mL) while both essential oils inhibited the growth of Fusarium oxysporum(MIC 50 μg/mL). This is the first report on chemical constituents and antimicrobial activity of the essential oils of A. rubidum.

scholarly journals Chemical Compostions of Essential Oils and Antimicrobial Activity of Hyptis suaveolens (L.) Poit. (Lamiaceae) from Vietnam

2020 ◽  
pp. 114-123 ◽  
Author(s):  
Nguyen Thanh Chung ◽  
Le Thi Huong ◽  
Do Ngoc Dai ◽  
Isiaka Ajani Ogunwande
Keyword(s):  
Gas Chromatography ◽  
Antimicrobial Activity ◽  
Essential Oils ◽  
Antimicrobial Agents ◽  
Chemical Constituents ◽  
Authentic Sample ◽  
Moderate Activity ◽  
Hyptis Suaveolens ◽  
Ic50 Values ◽  
Leaf Oil

Aims: This present study described the chemical constituents and antimicrobial activity of essential oils hydrodistiled from the leaves and flowers of Hyptis suaveolens (L.) Poit. Study Design: This research was designed to accommodate different stages such as collection of authentic sample of Hyptis suaveolens, obtain essential oil by hydrodistillation, chemical analysis of the oil samples by gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC/MS) and screening of the essential oils for antimicrobial activity. Place and Duration of Study: School of Natural Science, Vinh University, Vinh City, Nghệ An Province, Vietnam, between August and December 2018. Methodology: The leaves and flowers of H. suaveolens used for this study were gotten from Đồng Văn Commune, Pù Hoạt Nature Reserve, Vietnam. The collection was done in December 2018. Essential oils were distilled off using hydrodistillation method according to established procedure. The determination of antimicrobial efficacy of essential oils of H. suaveolens will be achieved by the method of microdilution broth susceptibility assay. The minimum inhibitory concentration (MIC) and IC50 were evaluated accordingly. Results: The major compounds in the oil were b-caryophyllene (31.1% and 33.7%), caryophyllene oxide (17.6% and 3.9%), phytol (9.9% and 2.7%) and a-humulene (6.7% and 6.6%), respectively. The leaf oil displayed strong antimicrobial activity against Enterococcus faecalis ATCC299212, Bacillus cereus ATCC14579 and Candida albicans ATCC10231 with minimum inhibitory concentrations (MIC) of 16.0, 32.0 and 16.0 µg/mL respectively, while the IC50 values were 5.78, 9.35 and 6.78 µg/mL, respectively. The flower oil showed activity  towards the same organisms with MIC values of 64.0, 64.0 and 16.0 µg/mL, respectively;   with IC50 values of 20.45, 26.78 and 6.78 µg/mL, respectively. Both essential oils exhibited moderate activity towards Staphylococcus aureus ATCC25923 with MIC of 256.0 µg/mL. Conclusion: The results are indication of the potential of H. suaveolens essential oils as source of antimicrobial agents.

scholarly journals Chemical Composition and Antimicrobial Studies of the Essential Oils of Jatropha integerrima Jacq (Leaf and Seeds)

2007 ◽  
Vol 2 (8) ◽  
pp. 1934578X0700200
Author(s):  
Adeolu O. Eshilokun ◽  
Adeleke A. Kasali ◽  
Isiaka A. Ogunwande ◽  
Tameka M. Walker ◽  
Williams N. Setzer
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Significant Variation ◽  
Seed Oil ◽  
Chemical Constituents ◽  
The Other ◽  
Antimicrobial Studies ◽  
And Staphylococcus Aureus

The chemical composition of the essential oils of the leaves and seeds of Jatropha integerrima was investigated by GC and GC-MS. The results showed significant variation in the chemical constituents of the tissue/parts analyzed. The leaf has pentadecanal (32.4%), 1,8-cineole (11.2%) and β-ionone (10.8%) as the major components. On the other hand, the seed oil is comprised mainly of aliphatic hydrocarbons represented by pentacosane (13.6%), hexacosane (13.3%), octacosane (12.3%) and heptacosane (10.1%). However, the defatted seed oil was predominantly made up of the monoterpenes 1,8-cineole (35.5%), p-cymene (20.5%) and α-pinene (16.5%). The oils displayed weak antimicrobial activity against Bacillus cereus and Staphylococcus aureus.

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