Search Results - "Demuner, A J"

Leaf Alkaloids, Phenolics, and Coffee Resistance to the Leaf Miner Leucoptera coffeella (Lepidoptera: Lyonetiidae) by Magalhães, S.T.V., Fernandes, F. L., Demuner, A. J., Picanço, M. C., Guedes, R.N.C.

“…Coffee (Coffea spp.) alkaloids (caffeine and related methylxanthines) and phenolics (caffeic and chlorogenic acids) have recognized pestistatic/pesticidal…”
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Synthesis and evaluation of sesquiterpene lactone inhibitors of phospholipase A2 from Bothrops jararacussu by de Alvarenga, E.S., Silva, S.A., Barosa, L.C.A., Demuner, A.J., Parreira, A.G., Ribeiro, R.I.M.A., Marcussi, S., Ferreira, J.M.S., Resende, R.R., Granjeiro, P.A., Silva, J.A., Soares, A.M., Marangoni, S., Da Silva, S.L.

“…Several sesquiterpene lactone were synthesized and their inhibitive activities on phospholipase A2 (PLA2) from Bothrops jararacussu venom were evaluated…”
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Effect of coffee alkaloids and phenolics on egg-laying by the coffee leaf miner Leucoptera coffeella by Magalhães, S T V, Guedes, R N C, Demuner, A J, Lima, E R

“…The recognized importance of coffee alkaloids and phenolics mediating insect-plant interactions led to the present investigation aiming to test the hypothesis…”
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Phytochemical Profile of Pasture Weeds from the Brazilian Cerrado by RODRIGUES, D.A., PEREIRA, G.A.M., SILVA, A.A., SANTOS, M.H., DEMUNER, A.J., OLIVEIRA, P.M.

“…The great diversity of plant species in pastures of the Brazilian Cerrado with distinct ecophysiological characteristics indicates the possibility of finding,…”
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Synthesis and insecticidal activity of new amide derivatives of piperine by Paula, Vanderlúcia F de, Barbosa, Luiz C de A, Demuner, Antônio J, Piló-Veloso, Dorila, Picanço, Marcelo C

“…The natural lipophilic amides piperine and piperiline were isolated from Piper nigrum L (Piperaceae). Piperine was hydrolysed into piperic acid (85% yield)…”
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Spectroscopic and dynamic NMR study, X-ray crystallography and DFT calculations of two phosphoramidates: (C4H3O2)P(O)(Cl)C6H14N and (C4H3O2)P(O)(C6H11NH)2 by Oliveira, F.M., Barbosa, L.C.A., Demuner, A.J., Maltha, C.R.A., Fernandes, S.A., Carneiro, J.W.de M., Corrêa, R.S., Doriguetto, A.C.

“…[Display omitted] •In the NMR time scale a rotation of the CN and PN single bonds froze at 195K.•ΔG# for rotation of the CN bond of phosphoramidates was…”
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Chemical constituents of the bark of Gallesia gorazema by Barbosa, L.C.A., Demuner, A.J., Teixeira, R.R., Madruga, M.S.

“…Chemical composition analysis of the essential oil from the bark of Gallesia gorazema was carried out by GC/MS. This analysis led to the identification of six…”
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Assignment of the relative and absolute stereochemistry of two novel epoxides using NMR and DFT-GIAO calculations by Moraes, F.C., Alvarenga, E.S., Demuner, A.J., Viana, V.M.

“…Considering the potential biological application of isobenzofuranones, especially as agrochemical defensives, two novel epoxides,…”
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New 8-Oxabicyclo[3.2.1]oct-6-en-3-one Derivatives with Plant Growth Regulatory Activity by Demuner, Antonio J, Barbosa, Luiz C. A, Veloso, Dorila P

“…Several 8-oxabicyclo[3.2.1]oct-6-en-3-one derivatives have been prepared via the [3 + 4] cycloaddition between the oxyallyl carbocation generated from…”
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Structure and Plant Growth Regulatory Activity of New Diterpenes from Pterodon polygalaeflorus by Demuner, Antonio Jacinto, de Almeida Barbosa, Luiz Cláudio, Veloso, Dorila Piló, Alves, Dalton Luiz Ferreira, Howarth, Oliver W

“…Two new furanditerpenes, vouacapane-6α,7β,17β-triol (3) and vouacapane-6α,7β,17β,19-tetraol (4), have been isolated from the seeds of Pterodon polygalaeflorus…”
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21 alpha-fluoro-7-norvouacapane-17 beta,21 alpha-lactone by Ruggiero, S G, Gambardella, M T, Branco, M C, Demuner, A J, Barbosa, L C, Piló-Veloso, D

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Fitotoxicidade de novos álcoois e alquenos derivados do 2α,4α α -dimetil-8-oxabiciclo[3.2.1]oct-6-en-3-ona by L. C. A. Barbosa, C. R. A. Maltha, A. J. Demuner, V. L. Silva, F. M. Oliveira, E. E. L. Borges

“…A reação de cicloadição [4+3] entre o furano e o cátion oxialílico, gerado in situ a partir da 2,4- dibromopentan-3-ona, forneceu o…”
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Effects of Corynespora cassiicola on Lantana camara by Passos, J.L., Barbosa, L.C.A., Demuner, A.J., Barreto, R.W., King-Diaz, B., Lotina-Hennsen, B.

“…The present study combines the examination of toxins produced by C. cassiicola and the effects of the fungus colonization on L. camara. C. cassiicola was…”
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Toxicidade de filtrados de cultura de Alternaria euphorbiicola em folhas de Euphorbia heterophylla by Varejão, E.V.V, Demuner, A.J, Barbosa, L.C.A, Barreto, R.W, Vieira, B.S

“…A espécie fúngica Alternaria euphorbiicola é agente causal de severas necroses de inflorescência, queimas de folhas e cancros da haste em Euphorbia…”
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Prospecção química de compostos produzidos por Senna alata com atividade alelopática by Rodrigues, I.M.C., Souza Filho, A.P.S., Ferreira, F.A., Demuner, A.J.

“…Senna alata é uma espécie daninha frequente em pastagens da região amazônica. Suas folhas apresentam propriedades medicinais capazes de influenciar a…”
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Synthesis and herbicidal activity of 2alpha, 4alpha-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one derivatives by Costa, A V, Barbosa, L C, Demuner, A J, Silva, A A

“…The catalytic oxidation of 2alpha,4alpha-dimethyl-8-oxabicyclo[3.2. 1]oct-6-en-3-one with osmium tetraoxide and excess hydrogen peroxide resulted in the…”
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Synthesis and Herbicidal Activity of 2α,4α-Dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one Derivatives by Costa, Adilson V, Barbosa, Luiz Cláudio de A, Demuner, Antonio J, Silva, Antonio A

“…The catalytic oxidation of 2α,4α-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one with osmium tetraoxide and excess hydrogen peroxide resulted in the formation of…”
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Quantificação e composição química de cera epicuticular de folhas de eucalipto by Viana, R.G, Tuffi Santos, L.D, Demuner, A.J, Ferreira, F.A, Ferreira, L.R, Ferreira, E.A, Machado, A.F.L, Santos, M.V

“…Objetivou-se neste trabalho quantificar e relatar a composição química da cera epicuticular da folha de seis clones de eucalipto (UFV01, UFV02, UFV03, UFV04,…”
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Phytogrowth- and photosynthesis-inhibiting properties of nostoclide analogues by Barbosa, Luiz CA, Demuner, Antônio J, de Alvarenga, Elson S, Oliveira, Alberto, King-Diaz, Beatriz, Lotina-Hennsen, Blas

“…Six nostoclide analogues were synthesised from 3‐benzyl‐2(5H)‐furanone in one step, with yields ranging from 10 to 71%, and subjected to several biological…”
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Fitotoxicidade de novos álcoois e alquenos derivados do 2alfa,4alfa-dimetil-8-oxabiciclo[3.2.1]oct-6-en-3-ona by Barbosa, L. C. A, Maltha, C. R. A, Demuner, A. J, Silva, V. L., Oliveira, F. M, Borges, E. E. L

“…A reação de cicloadição [4+3] entre o furano e o cátion oxialílico, gerado in situ a partir da 2,4-dibromopentan-3-ona, forneceu o…”
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