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| Kharazian,Navaz. |
| In this study, we evaluated the chemotaxonomic status and chemical diversity of Salvia L. species in Iran using leaf flavonoid profiles. From natural habitats in the country, we collected samples of 14 species of the genus: S. spinosa L.; S. macrosiphon Boiss.; S. reuterana Boiss.; S. sharifii Rech.f. & Esfand.; S. nemorosa L.; S. virgata Jacq.; S. syriaca L.; S. mirzayanii Rech.f. & Esfand.; S. atropatana Bunge; S. limbata C. A. Mey; S. sclarea L.; S. ceratophylla L.; S. multicaulis Vahl.; and S. hydrangea Dc. ex Benth. Two-dimensional maps of these species were created with thin-layer chromatography. In order to study the taxonomic position of these species and 37 accessions, cluster analysis was applied. The results of the cluster... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thin-layer chromatography; Chemical diversity; Salvia; Flavonoid; Lamiaceae. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000200015 |
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| Oliveira,Renata Cabrera de; Bando,Érika; Machinski Junior,Miguel. |
| The aim of this work was to optimize and validate, by intralaboratorial procedures, a method for the determination of patulin in grapes by thin-layer chromatography. The steps of extraction, cleanup, detection and quantification were optimized. For the validation of the method, recovery assays with standard solutions and artificially contaminated samples were carried out. The mean recovery and the variation coefficient were 65.4% and 7.58%, respectively. The optimized conditions were: 50 mL of grape juice, three extraction stages (with 100 mL of ethyl acetate in the first stage and 50 mL in second and third stages), and 100 µL of ethanol to solubilize the extract. The solvent-system used was toluene - ethyl acetate - formic acid (6:3:1), and 0.5% MBTH in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Patulin; Mycotoxins; Grape; Thin-layer chromatography. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200023 |
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| Carvalho Neto,Moisés Felix de; Gervásio,Rita de Cássia Rodrigues Gonçalves; Araújo,Edigênia Cavalcante da Cruz; Almeida,Jadson Cardoso de; Guimarães,Amanda Leite. |
| Abstract: The objective of this work was to evaluate the phytochemical profile and bioactivity of extracts of Brazilian stinging (“cansanção”) nettle (Cnidoscolus urens) on cabbage caterpillar (Ascia monuste orseis). Mortality, larval stage duration, pupal viability and mass, percentage of deformed pupae, and feeding preference were evaluated. The constituent classes of the ethanolic extracts were also identified by analytical thin-layer chromatography (TLC). Ethanolic extracts of leaves and roots at 2% (m/v) and aqueous extract of roots at 20% (m/v) prolonged the larval phase of the insect. The ethanolic extract of leaves at 2% reduced pupal viability, and pupae from all treatments showed reduced masses and generated deformed adults. Except for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascia monuste orseis; Cnidoscolus urens; Botanical extracts; Thin-layer chromatography. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000841 |
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| Sabino,Myrna; Milanez,Thais Valéria; Lamardo,Leda Conceição Antonia; Inomata,Emiko Ikejiri; Zorzetto,Maria Ângela Pompeu; Navas,Sandra Aparecida; Stofer,Monica. |
| One hundred and thirty seven samples of peanuts and peanut containing foods were collected in markets in the State of São Paulo, Brazil, between January 1995 an December 1997. Most of the samples were collected by the Inspection Service of São Paulo Secretary of Health. The foods included raw peanuts, peanut candies ("paçoca" and "pé de moleque"), peanut butter, fried/roasted salted peanuts, "torrone", chocolate coated peanuts and salt-coated peanuts. The samples were analyzed for aflatoxins using a thin-layer chromatographic method. About 45% of the samples were positive for aflatoxins and 27% exceeded the limits of the Brazilian legislation (30.0 µg.kg-1 for aflatoxins B1+G1). The aflatoxins were confirmed by derivatization with trifluoroacetic acid. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxins; Peanuts; Peanut products; Thin-layer chromatography. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000100016 |
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