Search Results - "Barbosa, Luiz Cláudio Almeida"

The Fungal Phytotoxin Alternariol 9‑Methyl Ether and Some of Its Synthetic Analogues Inhibit the Photosynthetic Electron Transport Chain by Demuner, Antonio Jacinto, Barbosa, Luiz Cláudio Almeida, Miranda, Ana Cristina Mendes, Geraldo, Guilherme Carvalho, da Silva, Cleiton Moreira, Giberti, Samuele, Bertazzini, Michele, Forlani, Giuseppe

“…Alternariol and monomethylalternariol are natural phytotoxins produced by some fungal strains, such as Nimbya and Alternaria. These substances confer virulence…”
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Synthesis and phytotoxic activity of new pyridones derived from 4-hydroxy-6-methylpyridin-2(1H)-one by Demuner, Antonio Jacinto, Valente, Vania Maria Moreira, Barbosa, Luiz Cláudio Almeida, Rathi, Akshat H, Donohoe, Timothy J, Thompson, Amber L

“…Commercial dehydroacetic acid was converted into 4-hydroxy-6-methylpyridin-2(1H)-one (3), which was then condensed with several aliphatic aldehydes to produce…”
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Synthesis and biological evaluation of 2,5-bis(alkylamino)-1,4-benzoquinones by Barbosa, Luiz Cláudio Almeida, Pereira, Ulisses Alves, Maltha, Célia Regina Alvares, Teixeira, Róbson Ricardo, Moreira Valente, Vânia Maria, Oliveira Ferreira, José Roberto, Costa-Lotufo, Letícia Veras, Moraes, Manoel Odorico, Pessoa, Cláudia

“…A series of twelve 2,5-bis(alkylamino)-1,4-benzoquinones were prepared in yields ranging from 9-58% via the reaction between p-benzoquinone and various amines…”
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Phytotoxic effects of metabolites from Alternaria euphorbiicola against its host plant Euphorbia heterophylla by Varejão, Eduardo Vinícius Vieira, Demuner, Antônio Jacinto, Barbosa, Luiz Cláudio de Almeida, Barreto, Robert Weingart

“…A bioassay-guided fractionation of culture filtrates of the fungus Alternaria euphorbiicola, a pathogen of the weed Euphorbia heterophylla, led to the…”
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Rubrolide analogues as urease inhibitors by Varejão, Jodieh Oliveira Santana, Barbosa, Luiz Cláudio Almeida, Varejão, Eduardo Vinícius Vieira, Coreas, Nidia Magally Galdámez, Morais, Vinicius Stefano Santos, de Oliveira, André Mauricio, Barcelos, Rosimeire Coura, Maltha, Célia Regina Álvares, Modolo, Luzia Valentina

“…Urease is an important virulence factor involved in the colonization and infection of gastric mucosa by Helicobacter pylori . In this work, the urease…”
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Natural Abenquines and Their Synthetic Analogues Exert Algicidal Activity against Bloom-Forming Cyanobacteria by Nain-Perez, Amalyn, Barbosa, Luiz Cláudio Almeida, Maltha, Célia Regina Álvares, Forlani, Giuseppe

“…Abenquines are natural quinones, produced by some Streptomycetes, showing the ability to inhibit cyanobacterial growth in the 1 to 100 μM range. To further…”
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Evaluation of the chemical composition of Brazilian commercial Cymbopogon citratus (D.C.) stapf samples by Barbosa, Luiz Cláudio Almeida, Pereira, Ulisses Alves, Martinazzo, Ana Paula, Maltha, Célia Regina Alvares, Teixeira, Róbson Ricardo, Melo, Evandro de Castro

“…The concentration and the chemical composition of the essential oils obtained from different samples of Cymbopogon citratus were evaluated. Among the 12…”
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QSAR modeling of photosynthesis-inhibiting nostoclide derivatives by Teixeira, Róbson Ricardo, Pinheiro, Patrícia F, Barbosa, Luiz Cláudio de Almeida, Carneiro, José Walkimar de M, Forlani, Giuseppe

“…BACKGROUND: A statistical model, built using the CODESSA software package, was developed to describe the relationship between the structure of nostoclide…”
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Seasonal variation in the composition of volatile oils from Schinus terebinthifolius raddi by Barbosa, Luiz Cláudio Almeida, Demuner, Antônio Jacinto, Clemente, Alan Dumont, Paula, Vanderlúcia Fonseca de, Ismail, Faiz M. D.

“…Essential oils from leaves, ripe and unripe fruits of Schinus terebinthifolius growing in Brazil were investigated. Oil content from either ripe or unripe…”
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Chemical composition of the essential oil of Psidium guajava leaves and its toxicity against Sclerotinia sclerotiorum by Silva, Elizabeth Aparecida Josefi, Silva, Vanessa Paula da, Alves, Cassia Cristina Fernandes, Alves, José Milton, Souchie, Edson Luiz, Barbosa, Luiz Cláudio Almeida

“…Globally, the fungus Sclerotinia sclerotiorum is considered as one of the most important phytopathogens, since it affects the production of several…”
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Chemical Variability and Biological Activities of Eucalyptus spp. Essential Oils by Barbosa, Luiz Claudio Almeida, Filomeno, Claudinei Andrade, Teixeira, Robson Ricardo

“…Many plant species produce mixtures of odorous and volatile compounds known as essential oils (EOs). These mixtures play important roles in Nature and have…”
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Effect of natural and artificial drying of leaf biomassof Psidium guajava on the content and chemical composition of essential oil by Silva, Elizabeth Aparecida Josefi da, Silva, Vanessa Paula da, Alves, Cassia Cristina Fernandes, Alves, José Milton, Souchie, Edson Luiz, Barbosa, Luiz Cláudio Almeida

“…Psidium guajava L. is native to Central and South America. It is widely distributed and well adapted to Brazil, a producer of essential oils rich in terpenes…”
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Synthesis of New Phytogrowth-Inhibitory Substituted Aryl-p-Benzoquinones by de Almeida Barbosa, Luiz Cláudio, de Alvarenga, Elson Santiago, Demuner, Antônio Jacinto, Virtuoso, Luciano Sindra, Silva, Antônio Alberto

“…Reaction of [(2‐alkyloxy)methyl]‐1,4‐dimethoxybenzene 10 (alkyl=butyl, hexyl, decyl, tridecyl, tetradecyl, hexadecyl, and octadecyl) with ceric ammonium…”
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Harvest time on the content and chemical composition of essential oil from leaves of guava by Silva, Elizabeth Aparecida Josefi da, Silva, Vanessa Paula da, Alves, Cassia Cristina Fernandes, Alves, José Milton, Souchie, Edson Luiz, Barbosa, Luiz Cláudio de Almeida

“…The essential oil plants contents can be affected by several factors. For example, in certain plants, collection time has been observed to affect the content…”
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Synthesis and phytogrowth properties of oxabicyclic analogues related to helminthosporin by Barbosa, Luiz Cláudio Almeida, Nogueira, Leonardo Brandão, Maltha, Célia Regina Alvares, Teixeira, Róbson Ricardo, Silva, Antônio Alberto

“…This investigation describes the synthesis and biological evaluation of a series of oxabicyclic analogues related to the helminthosporins. Four oxabicycles…”
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Corymbia spp. and Eucalyptus spp. essential oils have insecticidal activity against Plutella xylostella by Filomeno, Claudinei Andrade, Barbosa, Luiz Claudio Almeida, Teixeira, Robson Ricardo, Pinheiro, Antônio Lelis, de Sá Farias, Elizeu, de Paula Silva, Eliete Meire, Picanço, Marcelo Coutinho

“…•The composition of essential oils from E. andrewsii, E. pyrocarpa and C. ptychocarpa is reported for the first time.•Essential oils from C. citriodora are…”
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Plant compounds insecticide activity against Coleoptera pests of stored products by Moreira, Márcio Dionizio(Universidade Federal de Viçosa Dep. de Biologia Animal), Picanço, Marcelo Coutinho(Universidade Federal de Viçosa Dep. de Biologia Animal), Barbosa, Luiz Cláudio de Almeida(UFV Dep. de Química), Guedes, Raul Narciso Carvalho(Universidade Federal de Viçosa Dep. de Biologia Animal), Campos, Mateus Ribeiro de(Universidade Federal de Viçosa Dep. de Biologia Animal), Silva, Gerson Adriano(Universidade Federal de Viçosa Dep. de Biologia Animal), Martins, Júlio Cláudio(Universidade Federal de Viçosa Dep. de Biologia Animal)

“…The objective of this work was to screen plants with insecticide activity, in order to isolate, identify and assess the bioactivity of insecticide compounds…”
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Basil conservation affected by cropping season, harvest time and storage period by Silva, F. da, Santos, R.H.S, Andrade, N.J. de, Barbosa, L.C.A, Casali, V.W.D, Lima, R.R. de, Passarinho, R. de M

“…Fresh basil (Ocimum basilicum L.) is used in food, phytotherapic industry, and in traditional therapeutic, due to its essential oil content and composition…”
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Bioactivity of essential oils from Artemisia against Diaphania hyalinata and its selectivity to beneficial insects by Seixas, Paula Tatiana Lopes, Demuner, Antonio Jacinto, Alvarenga, Elson Santiago, Barbosa, Luiz Claudio Almeida, Marques, Ana, Farias, Elizeu de Sá, Picanço, Marcelo Coutinho

“…The demand for effective insecticides in pest control with low toxicity to the non-target organisms, such as natural enemies and pollinators, is increasing…”
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Seasonal variation in the chemical composition and antimicrobial activity of volatile oils of three species of Leptospermum (Myrtaceae) grown in Brazil by Demuner, Antonio Jacinto, Barbosa, Luiz Claudio Almeida, Magalhaes, Cassia Gonçalves, da Silva, Cleber Jose, Maltha, Celia Regina Alvares, Pinheiro, Antonio Lelis

“…This study investigates the seasonal variation of three species of Leptospermum (Myrtaceae) grown in Brazil. The chemical composition of the volatile oils of…”
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