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An approach to the study of the fungal deterioration of a classical art material: Mastic varnish Electron. J. Biotechnol.
Romero-Noguera,Julio; López-Miras,María del Mar; Martín-Sánchez,Inés; Ramos-López,José Miguel; Bolívar-Galiano,Fernando.
Mastic, one of the best natural varnishes, is frequently used as protective and finishing layer or as component of oleo-resinous media in paintings, both in the past and currently. However, this resin is affected by complex deterioration processes which can change its characteristics and thus the visual aspect of works of art. The alteration processes caused by radiation have been widely studied, but there is a lack of information on the biodeterioration of this natural product. In this paper, fungi from collections as well as from oil paintings of the Fine Arts Museum of Granada (Spain) were inoculated onto slides covered with mastic. The samples, after an incubation period of 15 days, were analysed by gas chromatography-mass spectrometry (GC-MS) to...
Tipo: Journal article Palavras-chave: Biodeterioration; Fungi; GC-MS; Mastic.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000600001
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Analysis of volatile compounds in extra virgin olive oil from Rio Grande do Sul by SPME/GC-MS. Repositório Alice
BRILHANTE, N. S.; BIZZO, H. R.; FARIA-MACHADO, A. F. de; SANTOS, M. C. da S.; GAMA, P. E..
De 15 a 16 maio 2019. Trabalhos apresentados de forma oral.
Tipo: Anais e Proceedings de eventos Palavras-chave: GC-MS; SPME; Koroneiki; Tecnologia; Olive oil; Volatile compounds.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109373
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Analytical method validation to evaluate dithiocarbamates degradation in biobeds in South of Brazil. Repositório Alice
VARELI, C. S.; PIZZUTTI, I. R.; GEBLER, L.; CARDOSO, C. D.; GAI, D. S. H.; FONTANA, M. E. Z..
In order to evaluate the efficiency of biobeds on DTC degradation, the aim of this study was to apply, optimize and validate a method to determine dithiocarbamate (mancozeb) in biobeds using gas chromatography-tandem mass spectrometry (GC-MS). The DTC pesticide mancozeb was hydrolysed in a tin (II) chloride solution at 1.5% in HCl (4 mol L−1 ), during 1 h in a water bath at 80 °C, and the CS2 formed was extracted in isooctane. After cooling, 1 mL of the organic layer was transferred to an auto sampler vial and analyzed by GC-MS. A complete validation study was performed and the following parameters were assessed: linearity of the analytical curve (r2 ), estimated method and instrument limits of detection and limits of quantification (LODm, LODi,...
Tipo: Artigo de periódico Palavras-chave: Biobed; Biomixture; Dithiocarbamates; GC-MS; Biodegradation; Degradation.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1102339
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Antimicrobial activity and chemical constituents of essential oils and oleoresins extracted from eight pepper species Ciência Rural
Martinelli,Laira; Rosa,Jessica Miranda; Ferreira,Carolina dos Santos Bragine; Nascimento,Gustavo Marcelo da Luz; Freitas,Mateus Silveira; Pizato,Luiz Carlos; Santos,Wanderson de Oliveira; Pires,Ricardo Francisco; Okura,Mônica Hitomi; Malpass,Geoffroy Roger Pointer; Granato,Ana Claudia.
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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Peppers; Essential oil; Oleoresins; Antimicrobial activity; GC-MS.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500451
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Biodeterioration patterns found in dammar resin used as art material Electron. J. Biotechnol.
Romero-Noguera,Julio; Martín-Sánchez,Inés; López-Miras,María del Mar; Ramos-López,José Miguel; Bolívar-Galiano,Fernando.
Since the middle of the XIX century, when dammar became popular in Occident, this natural resin is one of the most used in art painting techniques as final protective coating (varnish) as well as a component of pictorial media. The present work is the first approach to the study of the microbiological biodeterioration of this artistic material, which can seriously affect the appearance and integrity of works of art when bad conservation conditions -especially high humidity levels- take place. 12 microorganisms, fungi and bacteria, came from collection and from oil paintings affected by biodeterioration patterns, were inoculated on test specimens prepared with varnish dammar. These were incubated and analyzed by GC-MS to determine both the microbiological...
Tipo: Journal article Palavras-chave: Bacteria; Biodeterioration; Dammar; Fungi; GC-MS.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300006
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BIOEFFICACY OF A COMMON WEED Datura metel AGAINST Colletotrichum gloeosporioides Planta Daninha
KARIM,M.; JABEEN,K.; IQBAL,S.; JAVAID,A..
ABSTRACT Mango (Mangifera indica) is one of the most important trees grown mainly in the tropical and subtropical countries. Anthracnose disease caused by Colletotrichum gloeosporioides, is the most damaging disease causing reduction of flower set and yield losses in mango. The present study was designed to evaluate antifungal activity of Datura metel extracts against C. gloeosporioides. Extracts (1% to 3%) of different parts of D. metel viz. leaves, seeds and roots were assessed for their antifungal potential. Methanolic seed extract of D. metel depicted the highest antifungal potential against the test fungus. All the applied concentrations effectively reduced growth of the test fungus. However, 1.5% conc. of methanolic seeds extract showed maximum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antifungal; GC-MS; Methanolic extracts; Phytochemical analysis.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100244
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Brazilian roasted coffee oil obtained by mechanical expelling: compositional analysis by GC-MS Ciênc. Tecnol. Aliment.
Oliveira,Alessandra L. de; Cruz,Paulo Marcio; Eberlin,Marcos N.; Cabral,Fernando A..
A preliminary analysis by GC-MS comparing the mass spectrum of the compounds with the Wiley 275 L mass spectral data base was used to identify the fatty acids and mainly, some volatile compounds responsible for the flavor of the roasted coffee oil. The oil was obtained by mechanical expelling of Brazilian beans (Coffea arabica) roasted at 238ºC for 10 minutes. Different sample preparation methodologies such as headspace, adsorbent suction trapping and esterification were used. It was possible to identify pyrazines, pyridines, furan derivatives and other compounds not reported in the literature.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee oil; Coffee flavor; Fatty acids; GC-MS; Pressing extraction.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612005000400009
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Characterization of volatiles in red- and white-fleshed loquat (Eriobotrya japonica) fruits by electronic nose and headspace solid-phase microextraction with gas chromatography-mass spectrometry Ciênc. Tecnol. Aliment.
SUN,Haiyan; CHEN,Weiwei; JIANG,Yun; HE,Qiao; LI,Xiaolin; GUO,Qigao; XIANG,Suqiong; XI,Wanpeng; LIANG,Guolu.
Abstract Aroma differences are generally sensed in white- and red-fleshed loquats. Here, volatile compounds in four white- and three red-fleshed loquat varieties were investigated by headspace solid-phase microextraction and combined analysis of electronic nose (e-nose) and gas chromatography-mass spectrometry (GC-MS). In total, 83 volatile compounds were identified, and 33 were common in all of the cultivars. D-limonene, hexanal, (E)-2-hexenal, octanal and nonanal were the most abundant volatile compounds. β-cyclocitral and β-ionone were only detected in red-fleshed varieties. Furthermore, Huayu Seedless 1 (triploid white-fleshed loquats) with low levels of terpenoid compounds detected by GC-MS were clearly differentiated from the other cultivars tested...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Loquat; Volatile compounds; Electronic nose; GC-MS.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020005004202
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Chemical composition of essential oil from ripe fruit of Schinus terebinthifolius Raddi and evaluation of its activity against wild strains of hospital origin BJM
Cole,E.R.; Santos,R.B. dos; Lacerda Júnior,V.; Martins,J.D.L.; Greco,S.J.; Cunha Neto,A..
The essential oil (EO) composition of ripe fruit of S. terebinthifolius Raddi was analyzed by GC-MS. The oil extraction yielded 6.54 ± 1.06% (w/w). Seventeen compounds were identified, accounting for 91.15% of the total oil, where monoterpenes constituted the main chemical class (85.81%), followed by sesquiterpenes (5.34%). The major monoterpene identified was δ-3-carene (30.37%), followed by limonene (17.44%), α-phellandrene (12.60%) and α-pinene (12.59%). Trans-caryophyllene (1.77%) was the major sesquiterpene identified. The antibacterial activity of the essential oil was evaluated against wild strains of hospital origin (Escherichia coli, Pseudomonas sp., Klebsiella oxytoca, Corynebacterium sp., Staphylococcus aureus, Enterobacter sp., Enterobacter...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Essential oil; Schinus terebinthifolius Raddi; GC-MS; Antibacterial activity.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300009
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Chemical profile of the volátiles of Baccharis salicifolia (Asteraceae) and interaction with Macrodactylus nigripes (Coleoptera: Melolonthidae) Acta Agron. (Palmira)
Nieves-Silva,Ericka; Romero-López,Angel A..
Abstract Plant products or substances medíate interactions among organisms from different trophic levels, including phytophagous insects. These interactions have been cited in a chemical-ecology context for species of Coleoptera Melolonthidae. However, there are no previous reports of these interactions among melolonthid beetles species distributed in Mexico and host plants. For the above, the interaction between adults of ‘rose chafer’ Macrodactylus nigripes Bates (Coleoptera: Melolonthidae) and ‘seep willow’ shrub Baccharis salicifolia (Ruíz and Pav.) Pers. (Asteraceae) was recorded and the leaves volatiles of seep willow that might be involved in the attraction of these insects were extracted and identified. The sequence of behavior patterns that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Attraction; Plant volátiles; “rose chafer”; SPME; GC-MS.
Ano: 2019 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000300222
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Evaluation of headspace solid-phase microextraction gas chromatography - mass spectrometry for the characterization of volatile organic compounds from melon (Cucumis melo L.) flowers. Repositório Alice
SILVA, F. A. N.; SILVA, A. A.; FERNANDES, N. S.; RODRIGUES, T. H. S.; CANUTO, K. M.; NASCIMENTO, R. F.; BRITO, E. S. de; ARAGAO, F. A. S. de; FREITAS, B. M.; ZOCOLO, G. J..
Tipo: Artigo de periódico Palavras-chave: VOCs; Headspace; Flor de melão; SPME; GC-MS; Melão; Melons.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1099467
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Evaluation of noni (Morinda citrifolia) volatile profile by dynamic headspace and gas chromatography-mass spectrometry Ciênc. Tecnol. Aliment.
Sousa,Adriana; Souza Neto,Manoel Alves; Garruti,Deborah dos Santos; Sousa,João; Brito,Edy Sousa de.
Noni is a fruit that has interested the scientific community due to its medicinal and functional activities. Different products that contain noni are already in the market, but their consumption could be impaired by their distinctive unpleasant aroma and flavor. The aim of this work was to evaluate the noni pulp volatile profile by dynamic headspace and gas chromatography-mass spectrometry. Thirty seven volatile compounds were detected, mainly alcohols (63.3%), esters (26.9%), cetones (7.4%), and acids (1.2%).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Noni; Volatile compounds; GC-MS; Aroma; Flavor.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000300011
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GC-MS determination of chlorotriazines in aqueous environmental samples. Repositório Alice
SANTOS, N. A. G.; LANCHOTE, V. L.; DREOSSI, S. A. C.; GOMES, M. A. F.; CERDEIRA, A. L.; CARVALHO, D.; BONATO, P. S..
The extensive use of chlorotriazines as selective herbicides in agriculture and their relatively high persistence imply that these compounds are now present in the environment, contaminating surface and groundwater. In European countries, United States and Canada, the drinking water ordinance demands a limited concentration of 0.5 ug/l for the sum of all pesticides and 0.1 ug/l with respect to each compound, with the consequent need for sensitive and selective analytical methods. Gas chromatography-mass spectrometry (GC-MS) is the most reliable technique for this kind of analysis and was employed in the present study to evaluate the contamination of aqueous environmental samples by atrazine, simazine and ametryne. Surface water samples (1 liter) were...
Tipo: Artigo de periódico Palavras-chave: GC-MS; Chlorotriazines.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/12896
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Hongos endofíticos de Camellia sinensis muestran una actividad antimicrobiana contra el tizón del arroz Magnaporthe grisea Phyton
Zhu,XJ; Hu,YF; Chen,X; Wang,YH; Fang,WP; Li,XH.
El propósito de este estudio fue evaluar la actividad antagonista de dos cepas de hongos endofíticos, Pseudocercospora kaki y Penicillium sclerotiorum, aislados de las hojas de Camellia sinensis, en relación al patógeno del tizón del arroz Magnaporthe grisea. La actividad inhibitoria de las dos cepas endófitas sobre M. grisea en cultivo dual se comparó con aquella en monocultivo. Se confirmó que el caldo y su extracto de etil acetato del cultivo dual tuvieron una actividad mucho más inhibitoria sobre M. grisea que los monocultivos de P. kaki y P. sclerotiorum. Los índices antagonistas del caldo y extracto de etil acetato del cultivo dual sobre el crecimiento del micelio de M. grisea fueron 78,02% ± 2,19% y 62,81% ± 2,29%, respectivamente, en diferentes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Camellia sinensis; Hongos endofíticos; Cultivo dual; Actividad antimicrobiana; GC-MS.
Ano: 2014 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000100008
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Identification of antifungal compounds from slender amaranth Planta Daninha
Akbar,Muhammad; N. Sherazi,Iram; Khalil,Tayyaba; S. Iqbal,Muhammad; Akhtar,Shamim; N. Khan,Salik.
Abstract Background: Antifungal activity of slender amaranth (Amaranthus viridis L.) is well documented but such studies are scarce in Pakistan, especially against plant pathogens. It was hypothesized that A. viridis has antifungal activity against fungal phyto-pathogens also. Objective: Identification of antifungal constituents from leaf extracts of A. viridis. Methods: Different organic solvent extracts of A. viridis leaves were evaluated against 5 plant pathogenic fungal species viz. Alternaria alternata, Aspergillus flavus, Drechslera australiensis, Fusarium oxysporum and Macrophomina phaseolina. Antifungal activity of A. viridis was determined by serial dilution method. Six levels (0, 5, 10, 15, 20 and 25 mg mL-1) of treatments of each n-hexane,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amaranthus viridis; Antifungal; GC-MS; Plant pathogenic; Slender amaranth.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100313
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Identification of volatile compounds in cultivars barker, collinson, fortuna and geada of avocado (Persea americana, Mill.) fruit Ciênc. Tecnol. Aliment.
GALVAO,Mercia de Sousa; NUNES,Maria Lúcia; CONSTANT,Patricia Beltrão Lessa; NARAIN,Narendra.
Abstract The objective of this paper was to determine the volatile profile of four cultivars - Barker, Collinson, Fortuna and Geada of avocado (Persea americana, Mill.) fruit and to perform a detailed study on the effect of volatiles extraction conditions. The best conditions for extraction for Collinson and Fortuna cultivars were by using a mixture of pentane and ethyl ether (2:1) as solvent for 80 min, while for Barker and Geada cultivars, the solvents were hexane and pentane-ether (2:1), respectively but for a shorter extraction period of 60 min. A total number of 158 compounds were separated in all 4 avocado cultivars, among them eighty-four volatile compounds were identified. The principal volatile compounds viz. hexanal, ethyl acetate, methyl...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avocado; Aroma; Quality; Pulp; GC-MS.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000300439
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Isolamento e caracterização de substâncias fungicidas da planta Conyza canadensis. Repositório Alice
PORTO, R. S.; RATH, S.; QUEIROZ, S. C. do N. de.
Tipo: Separatas Palavras-chave: PHWE; GC-MS; Produtos naturais; Fungicida; Conyza canadensis.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1005077
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Lantana camara: Phytochemical Analysis and Antifungal Prospective Planta Daninha
BASHIR,S.; JABEEN,K.; IQBAL,S.; JAVED,S.; NAEEM,A..
ABSTRACT: In the current study phytochemical analysis and in vitro antifungal potential of fruits, leaves and stem of Lantana camara L. were studied. The phytochemical analysis indicated the presence of alkaloids, flavonoids, tannins, saponins, glycosides and terpenoids in fruit, stem and leaves of L. camara. The in vitro antifungal activity of fruit, stem and leaves of L. camara was tested against Colletotrichum gloeosporioides Penz. Different concentrations (1-5%) of methanolic extract of all the selected parts of L. camara were applied in vitro against the test fungus. The results of in vitro experiment revealed that higher concentration of methanolic fruit extract (5%) significantly reduced the biomass C. gloeosporioides up to 66%. This effective...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anthracnose; Bioactivity; Colletotrichum gleosporioides; GC-MS; Phytochemicals.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100167
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Management of Ascochyta rabiei by Chenopodium album Extracts Planta Daninha
SHERAZI,A.Z.; JABEEN,K.; IQBAL,S.; YOUSAF,Z..
ABSTRACT Chenopodium album, leaves were selected to evaluate their antifungal potential against Ascochyta rabiei causative agent for chickpea blight. Different concentrations of methanolic extract of C. album leaves i.e. 1%, 2.5%, 4%, 5.5% and 7% were tested against the target fungus A. rabiei. Maximum reduction in the test fungal biomass (68%) was observed in 7% concentration. This methanolic leaf extract was partitioned and n-butanol, chloroform, n-hexane, ethyl acetate fractions were isolated according to their polarity. In vitro antifungal activity of these fractions was studied by serial dilution method. n-hexane fraction exhibited the highest antifungal potential with 55% inhibition in test fungal biomass, so this fraction was selected for Gas...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antifungal potential; Bathu; GC-MS; Methanolic extract.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400675
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Method development for the analysis of volatile compounds in olive oil. Repositório Alice
BRILHANTE, N. S.; BIZZO, H. R.; FARIA-MACHADO, A. F. de; SANTOS, M. C. da S.; GAMA, P. E..
Olive oil consists mainly of triglycerides, in about 97 to 99% by weight. The minor compounds are a complex mixture of polar, apolar and amphiphilic substances, such as tocopherols, phenolic compounds, sterols, chlorophyll, carotenoids, terpene acids, monoglycerides and diglycerides, free fatty acids and volatile compounds. These volatiles are the compounds directly responsible for the aroma of the oil. Extra virgin olive oil has a complex aroma with more than 100 volatile compounds identified, among aldehydes, alcohols, esters, hydrocarbons, ketones and furans. The objective of this study was to develop an analytical method for volatile compounds in olive oils using solid-phase microextraction (SPME), gas chromatography coupled to mass spectrometry...
Tipo: Anais e Proceedings de eventos Palavras-chave: SPME; GC-FID; GC-MS; Olive oil; Volatile compounds.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109353
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