scholarly journals Preference monitoring of Bactrocera spp. through installation of methyl eugenol traps at different heights in Jujube orchard

2021 ◽  
Vol 10 (4) ◽  
Author(s):  
Junaid Ahmed Vistro
Keyword(s):  
Methyl Eugenol

Comparative Analysis of In-Vitro Biological Activities of Methyl Eugenol Rich Cymbopogon khasianus Hack., Leaf Essential Oil with Pure Methyl Eugenol Compound

2020 ◽  
Vol 21 (10) ◽  
pp. 927-938 ◽  
Author(s):  
Roktim Gogoi ◽  
Rikraj Loying ◽  
Neelav Sarma ◽  
Twahira Begum ◽  
Sudin K. Pandey ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Biological Activities ◽  
Methyl Eugenol ◽  
Dpph Assay ◽  
Pure Compound ◽  
Allium Cepa Assay ◽  
Anti Inflammatory ◽  
Lemongrass Essential Oil

Background: The essential oil of methyl eugenol rich Cymbopogon khasianus Hack. was evaluated and its bioactivities were compared with pure methyl eugenol. So far, methyl eugenol rich essential oil of lemongrass was not studied for any biological activities; hence, the present study was conducted. Objective: This study examined the chemical composition of essential oil of methyl eugenol rich Cymbopogon khasianus Hack., and evaluated its antioxidant, anti-inflammatory, antimicrobial, and herbicidal properties and genotoxicity, which were compared with pure compound, methyl eugenol. Material and Methods: Methyl eugenol rich variety of Cymbopogon khasianus Hack., with registration no. INGR18037 (c.v. Jor Lab L-9) was collected from experimental farm CSIR-NEIST, Jorhat, Assam (26.7378°N, 94.1570°E). The essential oil wasobtained by hydro-distillation using a Clevenger apparatus. The chemical composition of the essential oil was evaluated using GC/MS analysis and its antioxidant (DPPH assay, reducing power assay), anti-inflammatory (Egg albumin denaturation assay), and antimicrobial (Disc diffusion assay, MIC) properties, seed germination effect and genotoxicity (Allium cepa assay) were studied and compared with pure Methyl Eugenol compound (ME). Results: Major components detected in the Essential Oil (EO) through Gas chromatography/mass spectroscopy analysis were methyl eugenol (73.17%) and β-myrcene (8.58%). A total of 35components were detected with a total identified area percentage of 98.34%. DPPH assay revealed considerable antioxidant activity of methyl eugenol rich lemongrass essential oil (IC50= 2.263 μg/mL), which is lower than standard ascorbic acid (IC50 2.58 μg/mL), and higher than standard Methyl Eugenol (ME) (IC50 2.253 μg/mL). Methyl eugenol rich lemongrass EO showed IC50 38.00 μg/mL, ME 36.44 μg/mL, and sodium diclofenac 22.76 μg/mL, in in-vitro anti-inflammatory test. Moderate antimicrobial activity towards the 8 tested microbes was shown by methyl eugenol rich lemongrass essential oil whose effectiveness against the microbes was less as compared to pure ME standard. Seed germination assay further revealed the herbicidal properties of methyl eugenol rich essential oil. Moreover, Allium cepa assay revealed moderate genotoxicity of the essential oil. Conclusion: This paper compared the antioxidant, anti-inflammatory, antimicrobial, genotoxicity and herbicidal activities of methyl eugenol rich lemongrass with pure methyl eugenol. This methyl eugenol rich lemongrass variety can be used as an alternative of methyl eugenol pure compound. Hence, the essential oil of this variety has the potential of developing cost-effective, easily available antioxidative/ antimicrobial drugs but its use should be under the safety range of methyl eugenol and needs further clinical trials.

scholarly journals Suggestions on the Contribution of Methyl Eugenol and Eugenol to Bay Laurel (Laurus nobilis L.) Essential Oil Preservative Activity through Radical Scavenging

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2342
Author(s):  
Nikolaos Nenadis ◽  
Maria Papapostolou ◽  
Maria Z. Tsimidou
Keyword(s):  
Essential Oil ◽  
Radical Scavenging Activity ◽  
Pearson Correlation ◽  
Radical Scavenging ◽  
Methyl Eugenol ◽  
Partial Least Square ◽  
Least Square ◽  
Partial Least Square Regression ◽  
Positive Contribution ◽  
Scavenging Activity

The present study examined the radical scavenging potential of the two benzene derivatives found in the bay laurel essential oil (EO), namely methyl eugenol (MEug) and eugenol (Eug), theoretically and experimentally to make suggestions on their contribution to the EO preservative activity through such a mechanism. Calculation of appropriate molecular indices widely used to characterize chain-breaking antioxidants was carried out in the gas and liquid phases (n-hexane, n-octanol, methanol, water). Experimental evidence was based on the DPPH• scavenging assay applied to pure compounds and a set of bay laurel EOs chemically characterized with GC-MS/FID. Theoretical calculations suggested that the preservative properties of both compounds could be exerted through a radical scavenging mechanism via hydrogen atom donation. Eug was predicted to be of superior efficiency in line with experimental findings. Pearson correlation and partial least square regression analyses of the EO antioxidant activity values vs. % composition of individual volatiles indicated the positive contribution of both compounds to the radical scavenging activity of bay laurel EOs. Eug, despite its low content in bay laurel EOs, was found to influence the most the radical scavenging activity of the latter.

Species diversity and abundance of Dacus (Diptera: Tephritidae) in five ecosystems of Penang, West Malaysia

1982 ◽  
Vol 72 (4) ◽  
pp. 709-716 ◽  
Author(s):  
Tan Keng-Hong ◽  
Lee Soo-Lam
Keyword(s):  
Species Diversity ◽  
Capsicum Annuum ◽  
Fruits And Vegetables ◽  
Methyl Eugenol ◽  
Dacus Dorsalis ◽  
The Difference ◽  
Vegetable Farm ◽  
First Time

AbstractDacus dorsalis Hend. infested eleven, D. cucurbitae Coq. five and D. umbrosus F. two of the eighteen common fruits and vegetables grown in Penang, West Malaysia. D. tau (Wlk.) infested bacang (Mangifera foetida), D. caudatus F. chilli (Capsicum annuum) and D. frauenfeldi Schin. water guava (Eugenia javanica), together with D. dorsalis. Pomelo (Citrus grandis) was found infested for the first time by D. cucurbitae. No flies were trapped using Capilure and trimedlure as baits. Cue-lure attracted D. caudatus, D. cucurbitae, D. frauenfeldi, D. occipitalis (Bez.) and D. tau. Methyl eugenol attracted D. dorsalis and D. umbrosus. Dorsalure was less attractive to D. caudatus and D. dorsalis than cue-lure and methyl eugenol, respectively, but it was equally attractive to D. frauenfeldi as cue-lure. Using traps baited with cue-lure or methyl eugenol in five ecosystems, the highest numbers of males of D. dorsalis, D. umbrosus, D. frauenfeldi and D. caudatus trapped were from a village, on a vegetable farm for D. cucurbitae, and D. occipitalis was only caught in a forest. Analysis showed that for each species of Dacus the difference between ecosystems was highly significant. The few examples caught in grassland were probably migrants.

scholarly journals Aromatic Profiles of Essential Oils from Five Commonly Used Thai Basils

Foods ◽  
2018 ◽  
Vol 7 (11) ◽  
pp. 175 ◽  
Author(s):  
Tibet Tangpao ◽  
Hsiao-Hang Chung ◽  
Sarana Sommano
Keyword(s):  
Mass Spectrometry ◽  
Essential Oils ◽  
Raw Materials ◽  
Principal Component ◽  
Methyl Eugenol ◽  
Gas Chromatography Mass Spectrometry ◽  
Ocimum Sanctum ◽  
Chemical Compositions ◽  
Ocimum Species ◽  
Holy Basil

The research objectives of this study are to analyse the volatile compositions of different basil types available in Thai markets and to descriptively determine their aromatic qualities. Essential oils were hydro-distillated from fresh leaves of two Holy basil (Ocimum sanctum) varieties namely, white and red and other basil species, including Tree basil (O. gratissimum), Thai basil (O. basilicum var. thyrsiflorum), and Lemon basil (O. citriodorum). Oil physiochemical characteristics and volatile chromatograms from Gas Chromatography–Mass Spectrometry (GC-MS) were used to qualitatively and quantitatively describe the chemical compositions. Estragole, eugenol, and methyl eugenol were among the major volatiles found in the essential oils of these basil types. Classification by Principal Component Analysis (PCA) advised that these Ocimum spp. samples are grouped based on either the distinctive anise, citrus aroma (estragole, geranial and neral), or spice-like aroma (methyl eugenol, β-caryophyllene, and α-cubebene). The essential oils were also used for descriptive sensorial determination by five semi-trained panellists, using the following developed terms: anise, citrus, herb, spice, sweet, and woody. The panellists were able to differentiate essential oils of white Holy basil from red Holy basil based on the intensity of the anisic attribute, while the anise and citrus scents were detected as dominant in the Lemon basil, Tree basil, and Thai basil essential oils. The overall benefit from this research was the elucidation of aromatic qualities from Thai common Ocimum species in order to assess their potential as the raw materials for new food products.

scholarly journals Phytochemical, cytotoxicity and antioxidant studies on the stem bark of Piper arborescens

2017 ◽  
Vol 13 (4) ◽  
pp. 840-845 ◽  
Author(s):  
Nicholas Anak Daniel ◽  
Fasihuddin Badruddin Ahmad ◽  
Zaini Assim ◽  
Chua Hun Pin
Keyword(s):  
Brine Shrimp ◽  
Antioxidant Activities ◽  
Stem Bark ◽  
Artemia Salina ◽  
Methyl Eugenol ◽  
Gas Chromatography Mass Spectrometry ◽  
Caryophyllene Oxide ◽  
Phytochemical Study ◽  
Crude Extracts ◽  
High Cytotoxicity

Phytochemical study on the stem bark of P. arborescens has isolated six secondary metabolites from the crude extracts by using column chromatography, while identification was performed by using Gas Chromatography - Mass Spectrometry (GC-MS), Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared (FTIR). The isolated metabolites were identified as caryophyllene oxide (1), α-bisabolol (2), benzamide 2-(methylamino) (3), 2-ethylpiperidine (4), piperine (5) and methyl eugenol (6). Toxicity test on the four crude extracts of P. arborescens shows a high cytotoxicity against Artemia salina brine shrimp with LC50 values ranging from 13.12 to 58.70 µg/mL. Greater cytotoxicity of the crude extracts of P. arborescens indicated the presence of potent cytotoxic components in this Piper spp. Antioxidant assay of P. arborescens against 2-diphenyl-1-picrylhydrazyl (DPPH) indicated moderate antioxidant activities of methanol, dichloromethane, chloroform and hexane crude extracts with EC50 values of 21.68, 23.82, 32.88 and 36.88 µg/mL, respectively.

scholarly journals POPULASI DAN JENIS LALAT BUAH YANG BERASSOSIASI DENGAN TANAMAN MARKISA DATARAN RENDAH ( Passiflora edulis Sims f. flavicarpa Deg)

2016 ◽  
Vol 2 (3) ◽  
pp. 186
Author(s):  
Suswati Suswati ◽  
Asmah Indrawati
Keyword(s):  
Methyl Eugenol ◽  
Passiflora Edulis ◽  
Passiflora Edulis Sims

Pengembangan markisa dataran rendah khususnya markisa kuning  ( Passiflora edulis Sims f. flavicarpa Deg) di Kecamatan Medan Tuntungan dihadapkan pada permasalahan tingginya serangan lalat buah.Tujuan penelitian adalah memperoleh informasi tentang jenis lalat buah yang berasosiasi dengan tanaman markisa dataran rendah.Penelitian dilakukan di Desa Sidomulyo dimana tanaman markisa ditanam dengan beberapa ketinggian rambatan. Pemasangan perangkap lalat buah menggunakan model perangkap Steiner ·yang sudah dimodifikasi dengan menggunakan botol air mineral bekas ukuran 1500 ml dan senyawa methyl eugenol. Ditemukan dua jenis lalat buah yaitu  Bractocera dorsalis dan B.umbrosa. B.dorsalis mendominasi jenis lalat buah pada tanaman markisa. B.umbrosa mendominasi (90.24%) jenis lalat buah yang menyerang tanaman markisa di Sidomulyo  dan  B.umbrosa sebesar 9.76%.   Kata kunci: markisa dataran rendah, perangkap, metyl eugenol, Bractocera  dorsalis, B.umbrosa

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