RESUMO
d-Limonene was investigated for contact and fumigant toxicity, ovicidal effects, oviposition-deterrent, development inhibition, and feeding-deterrent activities against three stored-product beetles (Coleoptera): lesser grain borer, Rhyzopertha dominica (F.); rice weevil, Sitophilus oryzae (L.); and red flour beetle, Tribolium castaneum (Herbst). Contact and fumigant toxicity decreased as larvae aged. Contact toxicity was similar for adults of the three species tested, but R. dominica was most susceptible to fumigant activity. T. castaneum oviposition decreased as concentration of d-limonene increased and d-limonene reduced oviposition up to 92.3% at the concentration of 2.14 mg/cm2. Hatching of d-limonene-treated eggs of T. castaneum was reduced by 94.5% with no subsequent larval and adult survival at 2.14 mg/cm2 concentration. A flour disc bioassay indicated 87.7 to 96.8% feeding-deterrency by d-limonene toward all three insect species tested at the highest concentration of 60.0 mg/g food. These results suggest that d-limonene can be effectively used to suppress populations of stored-product beetles.
Assuntos
Besouros/efeitos dos fármacos , Inseticidas/toxicidade , Terpenos/toxicidade , Animais , Besouros/crescimento & desenvolvimento , Besouros/fisiologia , Cicloexenos , Relação Dose-Resposta a Droga , Larva/efeitos dos fármacos , Limoneno , Oviposição/efeitos dos fármacos , Óvulo/efeitos dos fármacosRESUMO
The needles of Taxus wallichiana gave a taxoid 1-hydroxy- 2-deacetoxy-5-decinnamoyl-taxinine j, whose structure has been established by spectroscopic data and confirmed by X-ray crystallography. The taxoid possesses significant cytotoxic and immunomodulatory activity.
Assuntos
Antineoplásicos/farmacologia , Fatores Imunológicos/farmacologia , Taxoides/farmacologia , Taxus/química , Antineoplásicos/química , Antineoplásicos/isolamento & purificação , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Concanavalina A/farmacologia , Cristalografia por Raios X , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Fatores Imunológicos/química , Fatores Imunológicos/isolamento & purificação , Linfócitos/efeitos dos fármacos , Modelos Moleculares , Conformação Molecular , Taxoides/química , Taxoides/isolamento & purificação , Vimblastina/farmacologia , Vincristina/farmacologiaRESUMO
Absolute configuration of taxiresinol 1, a lignan from the heartwood of Taxus wallichiana has been determined as 8R, 8'R, and 7'R with the help of chemical correlation method and X-ray crystallography. The anticancer activity of taxiresinol 1 and other two lignans 2, 3 were also studied. Taxiresinol 1 showed notable anticancer activity in the in vitro bioassays against colon, liver, ovarian and breast cancer cell lines.