Lethal Toxicity
Mostrando 1-12 de 424 artigos, teses e dissertações.
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1. Phytocomponents, Evaluation of Anticholinesterase Activity and Toxicity of Hydroethanolic Extracts of Parkia platycephala Benth.
This study evaluated the chemical composition, antioxidant and anticholinesterase activities, and the toxicity of hydroethanolic extracts of the Parkia platycephala Benth. Hot extraction with 70% hydroethanolic solution was used to obtain crude extracts of the leaf (LE), bark (BE), flower (FE), and seed (SE). Separation and identification of the compounds we
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Synthesis and Evaluation of Nematicidal Activity of Compounds Derived from Norbornadiene
Nematode is a major problem in agriculture, the effective way to control this pest is through chemical control, but the efficient molecules present in the market have great toxicity to mammals and birds. Thus, there is a constant demand for the development of new nematicide molecules. This study describes the synthesis of 21 novel esters derived from norborn
J. Braz. Chem. Soc.. Publicado em: 2020-09
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3. A New Isoflavone and Other Constituents from Roots of Clitoria guianensis
A new isoflavone named pratensein-7-O-β-D-rutinoside [(-)-7-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranosyl-5,3’-dihydroxy-4’-methoxyisoflavone] and the known compounds biochanin A-7-O-β-D-rutinoside, 6-deoxyclitoriacetal 11-O-β-D-glucopyranoside, 6-deoxyclitoriacetal, (2S)-naringenin-6-C-β-D-glucopyranoside, (2R)-naringenin-6-C-β-D-glucopyranosi
J. Braz. Chem. Soc.. Publicado em: 2020-08
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4. Fumigant toxicity of some essential oils against Red Flour Beetles, Tribolium castaneum (Herbst) and its safety to mammals
Resumo Atividades fumigantes de três óleos essenciais - óleo de alho (Allium sativum L.); pimenta-malagueta (Capsicum annuum L.) e Nigella (Nigella sativa L.) - foram avaliadas em diferentes concentrações contra adultos e larvas de Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) com 20 dias de idade em laboratório. A mortalidade acumulada foi
Braz. J. Biol.. Publicado em: 02/12/2019
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5. Anthelmintic activity of Eucalyptus citriodora essential oil and its major component, citronellal, on sheep gastrointestinal nematodes
Resumo Este trabalho objetivou avaliar a atividade anti-helmíntica do óleo essencial de Eucalyptus citriodora e citronelal sobre nematoides gastrintestinais de ovinos. A composição do óleo essencial foi determinada por cromatografia gasosa acoplada à espectrometria de massas. As substâncias foram avaliadas in vitro utilizando-se teste de motilidade de
Rev. Bras. Parasitol. Vet.. Publicado em: 25/11/2019
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6. Development of a natural molluscicide prototype kit (MoluSchall) for the control of schistosomiasis mansoni transmission
Abstract INTRODUCTION In Brazil, Biomphalaria glabrata, B. tenagophila, and B. straminea are intermediate hosts of Schistosoma mansoni, the etiological agent of schistosomiasis mansoni. Molluscicide use is recommended by the WHO for controlling the transmission of this parasite. Euphorbia milii latex has shown promising results as an alternative molluscici
Rev. Soc. Bras. Med. Trop.. Publicado em: 14/10/2019
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7. TOXICITY OF ALKALOID FRACTIONS FROM Psychotria spp. (RUBIACEAE) AGAINST Atta sexdens FOREL, 1908 (HYMENOPTERA: FORMICIDAE)
ABSTRACT Leaf-cutting ants are the main pests in forest plantations. The most commonly used chemical control for the ants is toxic bait. However, the active ingredients in these baits have been restricted by forest certification organizations, justifying the search for new active compounds to control these insects. Thus, this work aimed to evaluate the formi
CERNE. Publicado em: 09/09/2019
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8. CONTACT TOXICITY OF ESSENTIAL OIL OF Croton pulegiodorus BAILL ON Sitophilus zeamais MOTSCHULSKY
RESUMO O objetivo do presente estudo foi avaliar a toxicidade por contato do óleo essencial de Croton pulegiodorus Baill sobre seis populações de Sitophilus zeamais Motschulsky. As populações de S. zeamais utilizadas apresentam diferentes padrões de susceptibilidade a inseticidas sintéticos e foram provenientes dos municípios de Crixás - GO, Espíri
Rev. Caatinga. Publicado em: 18/07/2019
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9. Peppermint essential oil as an anesthetic for and toxicity to juvenile silver catfish
Resumo: O objetivo deste trabalho foi avaliar a toxicidade e o potencial como anestésico do óleo essencial de hortelã-pimenta (Mentha piperita) para juvenis de jundiá (Rhamdia quelen). Para determinar a concentração letal em 4 horas (CL50-4h), 210 peixes (3,08±0,8 g e 7,59±0,67 cm) foram expostos a 0, 20, 50, 80, 110 e 140 mg L-1 do óleo essencial.
Pesq. agropec. bras.. Publicado em: 27/06/2019
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10. Composite-derived monomers affect cell viability and cytokine expression in human leukocytes stimulated with Porphyromonas gingivalis
Abstract Objectives: Dental composites release unreacted resin monomers into the oral environment, even after polymerization. Periodontal cells are, therefore, exposed to substances that potentially elicit the immune inflammatory response. The underlying molecular mechanisms associated with the interaction between resin monomers and human immune cells found
J. Appl. Oral Sci.. Publicado em: 03/06/2019
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11. Perspectives and Applications of Natural Products as Civilian Defense Devices
Civilian defense devices are physical and chemical artefacts used to incapacitate an aggressor without causing death or injury. As city violence increases, safety feelings became worst and a growing commercial demand for these materials supply faces technologically challenges not only to riot control but also to self-protection. Controversies on the use of t
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
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12. TOXICITY OF Esenbeckia pumila Pohl (Rutaceae) ON Artemia salina AND Atta sexdens rubropilosa
RESUMO A avaliação de moléculas com atividade inseticida provenientes de plantas que apresentam atividade tóxica ou repelente cresceu nos últimos anos, tendo como um dos principais alvos de estudo as formigas cortadeiras, consideradas as principais pragas das plantações brasileiras, especialmente do gênero Atta. Sendo assim, o objetivo deste trabalho
Rev. Caatinga. Publicado em: 09/05/2019