Determinação de óleos essenciais de alfavaca (Ocimum gratissimum L.), orégano (Origanum vulgare L.) e tomilho (Thymus vulgaris L.)

Borges, Anelise Miritz; Pereira, J. R. D.; Cardoso, Milton Ghedini; Alves, J.A.; Lucena, Eliseu Marlônio Pereira de

doi:10.1590/s1516-05722012000400013

Cited by 21 publications

(13 citation statements)

References 20 publications

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“…The initial moisture content of the O. gratissimum leaves used in the drying processes varied between 79.13 and 82.13%. Previous research of the same species reported initial moisture content values of 76.50% (Luz et al, 2009) and 78.26% (Borges et al, 2012), which are close to those determined in the present study.…”

Section: Resultssupporting

confidence: 91%

Intermittent drying of clove basil leaves: Process optimization and essential oil yield

Souza

Melo

Ávila

et al. 2020

Rev. bras. eng. agríc. ambient.

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This study investigated the effect of a drying method with intermittent ratios on the effective drying time, specific energy consumption and essential oil yield of clove basil (Ocimum gratissimum L.) leaves. The drying tests were conducted at the Postharvest Laboratory of Medicinal, Aromatic and Condiment Plants, from the Departamento de Engenharia Agrícola of the Universidade Federal de Viçosa, Viçosa, MG, Brazil (20° 46’ 13.5” S; 42° 52’ 23.3” W, and altitude of 645 m) in October and November 2017. The experiment was conducted by using a 3 × 4 factorial scheme including three drying temperatures at 50, 60 and 70 °C, with four drying processes: continuous drying and the following three intermittent drying/tempering ratios in minutes: 10/20, 15/15 and 20/10. The design was completely randomized and with three repetitions. The application of the 10/20 intermittent ratio reduced the effective drying time and the specific energy consumption. Regarding the essential oil yield, the use of the intermittence presented different results for each temperature of drying; the highest yields were observed with continuous drying at 50 °C and drying with the 20/10 intermittent ratio at 60 °C. The results indicate that intermittent drying at 50 °C is not recommended to preserve essential oil yields.

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Section: Resultssupporting

confidence: 91%

Intermittent drying of clove basil leaves: Process optimization and essential oil yield

Souza

Melo

Ávila

et al. 2020

Rev. bras. eng. agríc. ambient.

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“…We used clinical isolates E.coli 27 and S. aureus 358, multidrug resistant bacterial strains, provided by Institute Oswaldo Cruz. Bothstrains were maintained in Brain Heart Infusion (BHI), and for testing for resistancemodifying activity, the strains were suspended in a test tubewith distilled water to obtain a suspension with turbidity equivalent to 0.5 on the Mc Farland scale (1 x 10 8 CFU /mL).…”

Section: Microorganismsmentioning

confidence: 99%

“…25 However, the chemical composition of the oil varies according to the genotype of the plant, geographical origin, environmental conditions, season of the year, method of extraction of this oil and its preservation. 26 Several chemical shave been found in the essential oil of O. gratissimum (OEOg), such as Eugenol and Thymol, 27 γ-muurolene and β-caryophyllene, 28 α-bisabolene and γ-terpinene, 29 1.8-cineole and β-selinene, 30 and Geraniol and p-cymene. 31 OEOg is grouped into some chemo types according to the major constituents found, such as Eugenol, Thymol and Geraniol.…”

Section: Introductionmentioning

confidence: 99%

Chemical Profile of Essential oil of Ocimum gratissimum L. and Evaluation of Antibacterial and Drug Resistance-modifying Activity by Gaseous Contact Method

Silva¹,

Carvalho²,

Matias³

2015

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Introduction: Plant products with antimicrobial potential and ability to modulate the action of drugs have become the target of several studies. Many studies of the species Ocimum gratissimum Lamiaceae have reportedbiological activities in the essential oil and extracts of various parts of the plant. Objective: Evaluate the antibacterial and resistance-modifying activity of the essential oil of O. gratissimum (OEOg) and its major compound, Eugenol. Materials and Methods: OEOg was extracted by hydrodistillation and Eugenol was obtained commercially. Multiresistant strains of Escherichia coli and Staphylococos aureus were used to test for drug activity. Antibacterial and resistance-modifying activity of OEOg and Eugenol was evaluated by gaseous contact. Results: Chemical analysis of OEOg demonstrated the presence of Eugenol and other compounds such as 1, 8-cineole and β-selinene as well. In the evaluation of the antibacterial activity, both OEOg and Eugenol were unable to form a bacterial growth inhibition zone at any of the concentrations tested. However, the modulation tests with amikacin and erythromycin identified synergism with OEOg and eugenol against E. coli and S. aureus. Gentamicin combined with OEOg showed antagonism against S. aureus but synergism against E.coli. When gentamicin was combined with Eugenol, there was also synergism against S. aureus, whereas no effect was seen against E. coli. Conclusion: Given the results obtained in this study, it is concluded that OEOg and Eugenol may eventually represent a new therapeutic tool against antibiotic-resistant bacteria.

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“…Aguiar et al (2015) obtained 0.45% EO yield, when the plants were cultivated in the Crato region of Ceará, Brazil. Borges et al (2012) compared the EO yield from fresh and dry leaves of clove basil plants. The fresh leaves yielded 0.13% EO content, similar to this study.…”

Section: Characteristics Of Growth Field and Clove Basil Essential Oilmentioning

confidence: 99%

Antifungal activity, yield, and composition of Ocimum gratissimum essential oil

et al. 2017

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ABSTRACT. Ocimum gratissimum L. or clove basil, belongs to the Lamiaceae family, has various desirable uses and applications. Beyond its aromatic, seasoning, and medicinal applications, this plant also has antimicrobial activity. This study was aimed at assessing the antifungal activity, yield, and composition of the essential oil (EO) of O. gratissimum. The species was cultivated in garden beds with dystrophic red latosol soil type containing high organic-matter content. The EO was obtained by hydrodistillation of dried leaves in a modified Clevenger apparatus, followed by determination of its content. Chemical characterization was carried out by gas chromatographymass spectrometry (GC-MS). Microbial activity was assessed using the broth microdilution method, by determining the minimum inhibitory concentration (MIC), in order to compare the antimicrobial effect of EO in 10 isolates-Fusarium oxysporum f. sp tracheiphilum (CMM-0033), F. oxysporum f. sp. cubense (CMM-0813 and CMM-2819), F. oxysporum f. sp lycopersici (CMM-1104), F. solani (CMM-3828), Rhizoctonia solani (CMM-3274), and Macrophomina phaseolina (CMM-2715, CMM-3875, CMM-3615, and CMM-3650). The EO was a highly effective inhibitor of the studied phytopathogenic fungi, with MICs varying from 31.25 to 125 µg/mL. F. oxysporum f. sp lycopersici and R. solani were the most sensitive; both were inhibited at an MIC of 31.25 µg/mL. The EO content in the plant extract was 0.18%. Thirty chemical compounds were detected via GC-MS, with linalool (32.9%) being the major compound followed by 1,8-cineole (21.9%), both oxygenated monoterpenes. It can be concluded that clove basil EO is a highly effective antifungal agent, and therefore, a potential alternative for the control of plant pathogenic diseases.

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Determinação de óleos essenciais de alfavaca (Ocimum gratissimum L.), orégano (Origanum vulgare L.) e tomilho (Thymus vulgaris L.)

Cited by 21 publications

References 20 publications

Intermittent drying of clove basil leaves: Process optimization and essential oil yield

Intermittent drying of clove basil leaves: Process optimization and essential oil yield

Chemical Profile of Essential oil of Ocimum gratissimum L. and Evaluation of Antibacterial and Drug Resistance-modifying Activity by Gaseous Contact Method

Antifungal activity, yield, and composition of Ocimum gratissimum essential oil

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