Oil ofArtemisia Research Articles

Preparation and Characterization of a Novel Artemisia Oil Packaging Film and Its Application in Mango Preservation.

In this work, a new food packaging film was synthesized via blending Artemisia oil (AO) into soybean protein isolate (SPI) and gelatin (Gel) for the postharvest storage of mango. The morphological architecture and mechanical properties of the films were characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD), and other technologies. The results show that the prepared films had relatively flat surfaces with good mechanical properties. AO enhanced the light-blocking ability of the film, increased the hydrophobicity, and affected the moisture content and water solubility of the film to a certain extent. Furthermore, the antioxidant performance and antifungal (Colletotrichum gloeosporioides) capacity of the films increased with higher AO concentration due to the presence of the active components contained in AO. During mango storage applications, the films showed good freshness retention properties. The above results indicate that SPI-Gel films containing AO have excellent physicochemical and application properties and have great potential in the field of food packaging.

Contribution to phytochemical study and biological activities of Artemisia judaïca from the Algerian Sahara

This study aims to contribute to the valorisation of the Algerian desert flora, particularly the flora of Ahaggar, by conducting a phytochemical and biological investigation of the essential oil of Artemisia judaïca, a traditional aromatic plant used for various garlics in this region. After the extraction of the essential oil, chromatographic analysis and evaluations of antimicrobial and antioxidant activities are performed on this plant. The results show a very high yield of essential oil on average (> 3.5 ml per 100 g of dry plant). The studied essential oil of Artemisia judaïca is characterized by the presence of piperitone (73.65 %). This oil showed strong antifungal and antibacterial activities, probably due to its richness in piperitone. The evaluation of the antioxidant activity of the essential oil gave an IC50 value of 2.77± 0.05 mg/ml. The β-carotene bleaching test confirmed the trapping power of this essential oil.

Phytochemical and biocidal properties of Artemisia campestris subsp. campestris L. (Asteraceae) essential oil at the southern region of Algeria

Wormwood (Artemisia campestris subsp. campestris) is a perennial Asteraceae which is used in folk medicine in many places of the world. Even known as medicinal herb, this subspecies of A. campestris is not chemically characterized. Therefore, the aims of this study were to screen phytochemical, to characterize the essential oil of Artemisia campestris subsp.campestrisand to evaluatein vitro antibacterial and antifungal activity of these essential oil. Chemical analyses showed that wormwood contains mainly flavonoids, tannins and free saponins. Moreover, essential oil determination highlighted the presence of α and β pinene, β cymene and limonene which are known as biocidal compounds. For the antibacterial activity, the aromatogram method helped highlight the antibacterial activity of the essential oil of Artemisia against four bacteria Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae. This power is relatively low; the inhibition zones vary between 8 and 14,1 mm. The dilution method confirmed the results of the aromatogram method. The minimum inhibitory concentrations (MICs) obtained is between 0.031% and 0.125% respectively of 0.01 and 0.0413 mg/ml. The most sensitive bacterial strains are Pseudomonas aeruginosa and Klebsiella pneumoniae. Disk diffusion method also helped to highlight the essential oil antifungal power sagebrush country against mycelial growth of the tested strains especially Aspergillus niger. The zones of inhibition ranged from 22.5 to 24 mm where the values of MICs obtained are between 0.062% and 0.031% respectively representing 0.022 and 0.01 mg/ml. These results emphasized the potential use of the essential oil of A. campestris subsp. campestris as a preservative which is very promising for the food industry for its ability to prevent the oxidation of foods and reduce the growth of mycelial, which is responsible for food alteration.

In Vivo Anti-Candida Activity of Artemisia herba alba asso and Citrus aurantium Extracts Formulated in Different Ointments

Introduction: Today, people around the world have resorted to herbal medicine, due to the increase in antibiotic resistance and the side effects of synthetic drugs. Methods: Our research focused on the in vivo antifungal activity of three ointments formulated on the basis of methanolic extract of Citrus aurantium peel, ethanolic extract of the aerial part of Artemisia herba alba asso, and essential oil of Artemisia herba alba asso. Wistar rats were made immunosuppressed by Dexamethazone and Tetracycline. Three strains of Candida albicans, S1, S2 and S3 were inoculated. The fungal load of the area tested, the weight of the rats, as well as the macroscopic and microscopic appearance of the skins, were determined. Results: Cutaneous candidiasis was manifested as red, thick, scabbed lesions, mostly located on the infected area of t he animals. Microscopic observation of histological skin sections of animals infected and treated with the ointments, P1, P2 and P3 showed a well-preserved architecture of the skin. Erythema, edema, ulceration, erosion were seen in the skin of animals receiving placebo or Nystatin. The P3 ointment exerted a very powerful antifungal effect against especially the strain S1 compared to the other ointments (log 3.07±0.006 CFU/ml). The weight was regained significantly in the groups of animals receiving the ointments, and regression of growth was observed in the untreated animals and those treated by Nystatin and placebo. Conclusion: The EAH and MCP ointment and the essential oil of Artemisia developed, allowed to retain their significant antifungal activity against Candida.

Evaluating the Effect of Artemisia Aerial Parts Extracts on Candida albicans growth and Shear Bond Strength of Soft Denture Liner

After a period of use in the oral cavity the bond between denture base and soft denture liner weaken or fails creating a suitable environment for fungal colonization. Traditional medical plants that have antifungal agents are considered more safe and with few side effects. The objective of this study was to evaluate the effect of oil and ethanol extracts of Artemisia aerial parts on Candida albicans growth and shear bond strength of soft denture liner. Candida albicans species were isolated and diagnosed, oil and ethanol extracts of Artemisia were prepared, the effect of the extracts on Candida albicans were tested by agar well diffusion test and micro dilution test. Finally, 30 specimens of soft denture liner were prepared for testing shear bond strength by Universal Instron machine before and after incorporation of the extracts. The results showed that all the concentrations of oil extract inhibit the growth of Candida albicans except (12.5 mg/ml) and there were significant differences (P≤0.05) between all concentrations compared with Nystatin except between (100 and Nystatin) mg/ml in which there were no significant difference. In ethanol extract only the concentrations (100 and 75) mg/ml inhibited the growth of Candida albicans and there were significant differences between all concentrations (P≤0.05) with Nystatin, while shear bond strength was increased in ethanol extract and there were significant differences with the control (P≤0.05), but it was not affected in oil extract and there were no significant differences with the control (P>0.05). Interestingly, it’s concluded that oil and ethanol extracts of Artemisia aerials parts had an effect on Candida albicans, while shear bond strength was not affected by oil extract but increased in ethanol extract.

Characterization of some active organic compound from Cold and Hot aqueous solvent and Study their Antibiotic of Artemisia herba-alba Asso plant oil

This study includes the extraction of volatile oil from the Artemisia herba-alba plant (Asteraceae). Take the plant Artemisia from the city of heet Al-Anbar in Iraq, where the research knew the practical chemical components in the A. herba-alba plant. The cold and hot aqueous solvent extracted from the A. herba-alba plant and the study diagnoses their qualitative components. GC-mass, Thin-layer chromatography (T.L.C) used to isolate some active organic compounds from this oil. Ethyl acetate: Toluene 5: 95% used as mobile phase. The separation technique also used by Column (C.C) chromatography. Study the biological of the oil of A. herba-alba extracted by the cold and hot method, and studied its effect on some bacteria were. Results obtained are that plant A. herba-alba is acidic because it contains many compounds, phenol, resins, flavonoids, alkaloids, and turbines. GC-mass obtained got to show accompanying mixtures, camphor, filifolide A, 1-ethynyl-4-methoxy-4-methyl-2-cyclobuten-1-ol, lineatin, 2-pentanoylfuran, davana ether, caryophyllene oxide, beta-Myrcene, vulgarin, trans-caryophyllene, (2-Ethylhexyl), And bis phthalate are available in the accompanying percent 5%, 6%, 10%, 47.5%, 19%, 18.5%, 6%, 8%, 7.5%, 12.5%, 9%, and 6% separately are available in A. herba-alba oil that extricated by cold aqueous dissolvable. Furthermore, acquired demonstrate that the accompanying mixtures, 2-methyl-4-nitroresorcinol, cis-hydroxydavanone, vulgarin, and dihydroxanthin, are available in the simultaneous percent 4%, 8.25%, 7.25%, 5.75% individually are available in Artemisia oil that extracted by Hot aqueous solvent. T.L.C chromate-gram appears six zones for Cold aqueous solvent extract. Three zones of hot aqueous solvent extract identified and characterized by different spectroscopic methods UV-vis. And Ft-IR. Spectra. Some of the compounds appear six zones for Cold aqueous solvent extract, and three zones hot aqueous solvent extract ethyl acetate: Toluene used as mobile phase. Obtained and diagnosed the separation compound by spectroscopy UV-Vis and Ft-IR spectra. The active organic compounds present in the extract of the A. herba-alba plant have proven to have high biological efficacy against bacteria.

The Effect of Different Light Spectrum Ratios and Photosynthetic Photon Flux Density (PPFD) on Some Agronomic and Physiological Traits in Artemisia annua L.

In order to investigate the effect of the ratio of different light spectra on the growth and physiological traits of the medicinal plant Artemisia annua, an experiment was conducted based on a randomized complete block design with three replications. Experimental treatments were six levels of different light wavelengths including control (base light: full spectrum), base light + ultraviolet spectrum, base light + blue light spectrum, base light + green light spectrum, base light + red light spectrum and base light + far-red light spectrum. The results showed that different light ratios influenced all the measured traits. Accordingly, the application of all light treatments significantly increased the dry weight of the Artemisia plant. Also, the light treatments had significant (P≤0.01) effects on plants height, contents of chlorophyll a and b, total chlorophyll, carotenoids and anthocyanin. The percentage and yield of plant essential oils were impressed significantly (P≤0.01) under the application of different light wavelengths. Although UV increased the content of the essential oil, it reduced the yield of the essential oil due to the reduction in the dry weight of plants. According to the results of this study, it can be concluded that a combination of base light with blue light can increase the biomass yield as well as percentage and yield of essential oils of Artemisia, compared to control.

Essential oils from Artemisia species inhibit biofilm formation and the virulence of Escherichia coli EPEC 2348/69

Enteropathogenic Escherichia coli E2346/69 (EPEC) has caused foodborne outbreaks worldwide and the bacterium forms antimicrobial-tolerant biofilms. The anti-biofilm formation of various components of essential oils extracted from selected medicinal plants were investigated and tested on EPEC and wild strains of E. coli. Oils extracted from the family Asteraceae and their major common constituents at 0.031 and 0.062% (V/v) were found to significantly inhibit biofilm formation without affecting the growth of planktonic cells. In addition, three plants belonging to this family (Artemisia herba alba, Artemisia campestris and Artemisia absinthium) played important roles in the antimicrobial activity. Interestingly, their essential oils reduced the ability of E. coli (the EPEC and K12 strains) to form a biofilm. The crystal violet reduction assay showed that the plant extracts tested reduced biofilm formation with the inhibition of bacterial attachment up to 45% for EPEC and 70% for E. coli K-12 after 24 h treatment at 0.62 mg ml−1, demonstrating that Artemisia oils had a high anti-biofilm activity on the bacteria tested. The results indicate that the locus of enterocyte effacement (LEE) acquired by horizontal transfer promotes the formation of the attaching and effacing (A/E) lesion and increases the capacity of the photogen strain (EPEC) to form a biofilm. The chemical composition of the volatile compounds was obtained by gas chromatography-mass spectrometry analysis, which showed that the essential oils consisted of thirty-four compounds. Chamazulene (39.21%), β-pinene (32.07%), and α-thujone (29.39%) were the main constituents of the essential oils of A. herba alba, A. absinthium and A. campestris, respectively.

Efficacy of Essential Oils in In Vitro Control of Acinetobacter baumannii

Although Acinetobacter baumannii is common in nature and considered human skin and respiratory tract commensal, it has also been associated to serious infectious diseases, such as pneumonia, urinary tract infection, endocarditis, wound infection, meningitis and septicemia. The present study aimed to evaluate the intrinsic antimicrobial activity of essential oils on the Acinetobacter baumannii ATCC 17978 strain. We used essential oil of rosemary, artemisia, cinnamon, camphor, citronella, Indian clove, Eucalyptus globulus, Eucalyptus staigeriana, Eucalyptus citriodora, tea tree (also known as melaleuca), mint, oregano and sage, in concentrations that ranged from 0 to 100%. The antibacterial activity was determined through the broth microdilution method and through bactericidal kinetics of essential oils. All the oils performed antibacterial activity against Acinetobacter baumannii. citronella, Eucalyptus staigeriana and mint oils presented lower minimum inhibitory concentration and minimum bactericidal concentration. Oregano, tea tree and Indian clove oils presented higher bacterial death rate, and they canceled the microbial load of A. baumannii in up to 60 minutes. Keywords: Medicinal plants, Essential compounds for treatment, Antimicrobials, Mechanisms of action, Acinetobacter baumannii, Infectious diseases. Read more →

사자발쑥 정유를 첨가한 기능성 필름의 파프리카 선도 유지 효과

The aim of this study was to verify the effect of the essential oil (EO) of Artemisia princeps as a functional film component for enhancing the quality of paprika during storage. EO dilutions of 0.5, 1, and 2% were used for the experiments, and the bacterial growth inhibition effect of EO was confirmed against all tested bacteria. The paprika was packaged in 50 μm-thick polypropylene (PP) film containing 0.5% EO and then stored at 10°C for 21 days. To determine the effect of EO during paprika storage, the weight loss rate, color, soluble solid content, hardness, microorganism content, appearance, and vitamin C content were recorded for each sample. It was found that the PP film containing EO 0.5% prevented water loss, resulting in an improved appearance. In addition, the weight loss rate from the paprika for this film remained unchanged, unlike in the case of the paprika packaged in a corrugated box. In addition, the soluble solid contents, hardness, and CO2 contents of the film containing 0.5% EO were higher than those for the corrugated box-stored sample, thereby indicating the positive effect of EO on sample quality maintenance. In terms of the microbial quality assessment, the total number of aerobic bacteria and molds were lower for the 0.5% EO film-stored sample due to the antimicrobial effect of A. princeps. No effect was observed in terms of the vitamin C content. The obtained results therefore suggest that the application of EO to the PP film is effective for paprika quality preservation.

Green approach to corrosion inhibition of stainless steel in phosphoric acid of Artemesia herba albamedium using plant extract

Essential oil from aerial parts of Artemisia herba-alba from Morocco was hydrodistilled and its chemical composition oil was investigated by capillary GC and GC/MS. The major components were 1,8-cineole (35.6%) and camphor (24.1%). Artemisia herba-alba essential oil AHAO was tested as corrosion inhibitor of stainless steel (SS) in 1M H3PO4 using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy measurements (EIS) and scanning electronically microscopy (SEM) studies. The results obtained showed that the essential oil of Artemisia reduces the corrosion rate. Tafel polarization method indicates that the plant extract behaves as a mixed type inhibitor. The inhibition efficiency increased with inhibitor concentration to attain 88% at 1g.L−1 of oil at 298K. Nyquist diagrams obtained from impedance studies provide results confirming the anti-corrosion effect of the studied plant. The temperature effect on the corrosion behavior of (SS) in 1M H3PO4 without and with AHAO at 1g.L−1 was studied in the temperature range from 298 to 353K. Thermodynamic parameters suggested that the adsorption is spontaneous and exothermic process and support physical adsorption mechanism. The experimental data fits well into the Langmuir adsorption isotherm model. SEM/EDS studies provide the confirmatory evidence for the protection of (SS) by the green inhibitor. The results obtained from these methods used are in good agreement.

Repellent and fumigant toxic potential of three essential oils against Ephestia kuehniella

Essential oils, when used as bio-insecticides in the control of insect pests of stored grains have shown specificity and variation in the potentiality of their mode of action. In the present study, three essential oils extracted from three aromatic plants of different families, white wormwood (Artemisia herba alba, Asteraceae), oregano (Origanum vulgare, Lamiaceae) and rue (Ruta montana, Rutaceae), were evaluated for their repellent and fumigant toxic potential against the flour moth larvae, Ephestia kuehniella (Lepidoptera, Pyralidae), under laboratory conditions. The essential oils extraction was done by the hydrodistillation method. The repellent activity was carried out in Petri dishes using a filter paper treated with different oil dilutions (25, 75, 100, 120, 130, 150 µL/mL). The fumigant toxicity was determined on three concentrations (50, 130, 150 µL/L air). Two plants were shown to be repellent against the E. kuehniella larvae. Origanum oil was the most repellent with 67% of repellency rate followed by Artemisia oil (46%) at 120µL/mL after 2 hours of exposure. The oil of R. montana had an attractant activity against the larvae and was the most toxic with 56.7% of larval mortality in the first 24 hours. The median lethal concentrations (LC50) recorded were 11.6, 175.4 and 1100.0 µL/L air for the plant oils R. montana, O. vulgare and A. herba alba, respectively. R. montana and O. vulgare essential oil are shown to be efficient with high toxic and repellent properties against E. kuehniella larvae. Their specific potential could be integrated in the selection of the best bioinsecticides for the optimum protection of stored grain.

Chromatographic Study on Traditional Natural Preservatives Used for Palm Leaf Manuscripts in India

Abstract Extracts from plants have been used traditionally for the preservation of palm leaf manuscripts in India. Although these methods are slowly being replaced by modern chemicals, art conservators still prefer herbal plant extracts as fungicides and insecticides. In this study, several traditional herbal extracts from the state of Odisha were studied using GC-MS and their long-term impact on palm leaf manuscripts was substantiated by visual observation. GC-MS results showed the presence of different herbal plant extracts from walnut fruit, Artemisia oil, cinnamon oil, equisetum stem, circium roots, Rhizophora leaf, tobacco leaf, and beggar-tick plant oil in palm leaf manuscripts. Illustrated manuscripts were also studied using FTIR spectroscopy which showed the presence of starch paste and pectin as binding media mixed in the pigments and writing inks for palm leaf manuscripts.

Chemical Composition and Antibacterial Activity of Artemisia campestris ssp. glutinosa (J. Gay) Batt. and A. judaïca ssp. sahariensis (Chev.) Species Endemic to the Algerian Sahara

This study focused on two plant species endemic to the Algerian Sahara: Artemisia campestris ssp. glutinosa (J. Gay) Batt. and Artemisia judaïca ssp. sahariensis (Chev.). The aim of this work was to determine their chemical composition for a better insight into their traditional use and to evaluate the antibacterial potential of the essential oils of their leafy stems on 8 different bacterial strains. The analysis revealed that these two Artemisia species contain, respectively, 14.5 ± 0.40% and 11.4 ± 0.45% of total nitrogenous matter, 17.7 ± 0.34% and 33.7 ± 0.49% of crude fiber, 9.5 ± 0.82% and 8.5 ± 0.79% of mineral matter. Moreover, the results showed that the essential oils of Artemisia campestris ssp. Glutinosa contained α-pinene (8.83 ± 1.02%), β-pinene (28.94 ± 1.16%), limonene (8.51 ± 0.19%), α-thujone (0.18 ± 0.06%), β-thujone (0.67 ± 0.15%) and camphor (0.86 ± 0.02%). These essential oils also showed a high inhibitory activity on the growth of Enterococcus faecium, Staphylococcus pneumoniae and Staphylococcus aureus S. On the other hand, the essential oils of Artemisia judaïca ssp. sahariensis mainly contained piperitone (65.88 ± 6.12%), davanone (12.58 ± 5.81%) and thymol (0.56 ± 0.06%) and they exhibited an inhibitory activity on Pseudomonas aeruginosa S, Proteus mirabilis and Klebseilla pneumoniae. These results demonstrated the inhibitory activity of Artemisia's essential oils against certain human pathogens and thus they showed the great interest of studying Artemisia species for the scientific and medical community.

THE COMPOSITION OF ESSENTIAL OILS OF ARTEMISIA GENUS AND ARTEMISIA SECTION PLANTS GROWING WITHIN THE REPUBLIC OF BURYATIA

The composition of essential oils of Artemisia’s section representatives was presented in this paper. Essential oils of Artemisia vulgaris L. and Artemisia selengensis Turcz. were investigated. They were obtained by hydrodistillation method from the dried aerial parts of plants. Raw materials were collected during field works in 2016. Gas chromatography-mass spectrometry (GC-MS) analyses was conducted to determine the composition of essential oil. Gas chromatography (GC) analyses was performed on an Agilent Technologies 6890 gas chromatograph equipped with quadrupole mass selective detector HP 5973 (MS) and an HP-5MS capillary column (30 m × 0.25 mm × 0.2 μm). Artemisia vulgaris L. is a perennial herbaceous plant. Camphene, neointermediol and spathulenol were the dominant components of the essential oil of Artemisia vulgaris growing within the Republic of Buryatia. Artemisia selengensis is a perennial plant which has a lignified heel of the bine. It is widely used in a traditional Chinese medicine, it has anticancer, antiobesity, and anti-inflammatory activities. The chemical composition of Artemisia selengensis species plants, growing within the territory of Buryatia, has not been studied yet. The dominant components of essential oil were monoterpenoids – 1,8-cineole, linalool, borneol, α-terpineol, terpineol-4, trans-sabinenhydrate, and sesquiterpenoids – caryophyllene oxide, copaborneol. The comparison of the composition of obtained essential oils with literature data using Principle component analysis showed that the composition of essential oils is meant to be a diagnostic indicator of Artemisia species plants only in a combination with other features of the species – morphologic and ecological.

Volatile Components of the Essential Oil of Artemisia montana and Their Sedative Effects.

The sedative effects of volatile components in the essential oil of Artemisia montana ("Yomogi") were investigated and measured using gas chromatography-mass spectrometry (GC-MS). Major components identified included 1,8-cineol, camphor, borneol, α-piperitone, and caryophyllene oxide. Among them, 1,8-cineol exhibited the highest flavor dilution (FD) value in an aroma extract dilution analysis (AEDA), followed by borneol, o-cymene, β-thujone, and bornyl acetate. The sedative effects of yomogi oil aroma were evaluated by sensory testing, analysis of salivary α-amylase activity, and measurement of relative fluctuation of oxygenated hemoglobin concentration in the brain using near-infrared spectroscopy (NIRS). All results indicated the stress-reducing effects of the essential oil following nasal exposure, and according to the NIRS analysis, 1,8-cineol is likely responsible for the sedative effects of yomogi oil.

Response of cut carnation (Dianthus caryophllus L.cv. Tempo) to essential oils and antimicrobial compounds

Carnation (Dianthus caryophyllus L. cv. Tempo) cut flower is sensitiveto ethylene and bacterial infection on stem end. Bacterial contaminationproducestoxic compoundsand these compounds stimulate the ethylene productionthat ultimately shortens vase life. Cut flowers were kept in vases containing Artemisia oil and Anethum oil (both at 4, 8 and 12%), 8-hydroxyquinoline sulfate (200, 400 and 600 mg l -1 ) and aluminum sulfate (100, 200 and 300 mg l -1 ). Results showed that the 100 mg l -1 aluminum sulfate, 200 mg l -1 8-hydroxyquinoline sulfate, 12% Artemisia and Anethum essential oils induced the maximum vase life (17.9, 16.7, 16.1 and 15.1 days, respectively) of cut flowers.Vase life of control cut flowers was 13 days. Mentioned above treatments stimulate the minimum ethylene production and stem end bacterial colonies and maximum water uptake.

Chemical Composition and In Vitro Efficacy of Essential Oil of Seven Artemisia Species Against ESBL Producing Multidrug-Resistant Escherichia coli

Chemical composition and antibacterial and antibiotic interacting activities of essential oils obtained from the flowering branchlets of seven Artemisia species grown in Iran were investigated. Antibacterial activity against multi-drug resistance extended-spectrum β-lactamase (ESBL) positive Escherichia coli was also investigated. Major compounds in different Artemisia oils were α-phellandrene in A. absinthium, camphor in A. annua, 1,8-cineol and borneol in A. kulbadica, β-thujone in A. persica, cis-verbenol in A. santolina and 1-phenyl-penta-2,4-diene in A. scoparia. Artemisia oils showed synergism with antibiotics, in particular ciprofloxacin and nitrofurantoin, against all 5 tested ESBL positive E. coli. A. santolina and A. kulbadica showed promising synergistic activity with antibiotics. Using bioautography, compounds such as cis-verbenol, trans-verbenol and ρ-cymene-8-ol were identified as active compounds of A. santolina, and β-pinene, 1,8-cineol and borneol as active components of A. kulbadica. Artemisia species have antibacterial activity against all tested resistant ESBL positive E. coli and potentiate the efficacy of antibiotics.

Inhibition of Lead Corrosion in 0.1 M Na2CO3 by Artemisia Oil

The essential oil of Artemisia herba alba has been extracted and tested as an inhibitor of lead corrosion in 0.1 M Na 2CO 3 medium, using stationary and transient electrochem ical techniques. The results obtained show that the esse ntial oil of Artemisia reduces the corrosion rate. The effectiveness of inhibition inc reases with the oil concentration to reach 77 % with 2000 ppm. The effect of temperature was also studied.

КОМПОНЕНТНЫЙ СОСТАВ ЭФИРНОГО МАСЛА ARTEMISIA SERICEAE WEBER EX STECHM., ПРОИЗРАСТАЮЩЕЙ В ВОСТОЧНОЙ СИБИРИ

The paper contains the composition of essential oils obtained by hydrodistillation method from the samples of Artemisia sericea Weber ex Stechm., which grow on the territory of Eastern Siberia (Republic of Buryatia and Zabaikalien Territory). Chemical composition of essential oils of Artemisia was studied by gas chromatography-mass spectrometry. The essential oil is represented by a light yellow, thinly fluid liquid with absinthial odor. The most chemical assay of the essential oil is from the sample collected in Zabaikalien Territory (0.35%). Totally, there were detected more than 70 components, and 63 of them were identified. The main components of essential oils were presented by mono- and sesquiterpenoids. The share of monoterpenes account from 18.8% (from the sample of Zabaikalien Territory) to 51.5% (from Buryatian sample), 67.7% and 41.5% of sesquiterpenoids, respectively. The major components of the essential oils of both samples are germacrene D, 1,8-cineol, camphor, borneol, bornylacetate. The qualitative composition of the main components of essential oils remains constant, but their quantitative content varies, depending on the raw collection point.