Results 41 to 50 of about 1,651 (165)
Skin secretions of frogs have a high chemical complexity. They have diverse types of biomolecules, such as proteins, peptides, biogenic amines, and alkaloids. These compounds protect amphibians’ skin against growth of bacteria, fungi, and protozoa and participate in defense system against attack from predators.
Daniel S. S. de Medeiros +16 more
wiley +1 more source
O objetivo deste trabalho foi avaliar a influência da precipitação pluvial na lixiviação de herbicidas recomendados para a cultura da cana-de-açúcar em Latossolo Vermelho distrófico.
P.A. Monquero +4 more
doaj +1 more source
Adulteration and Contamination of Commercial Sap of Hymenaea Species
The Hymenaea stigonocarpa and Hymenaea martiana species, commonly known as “jatobá,” produce a sap which is extracted by perforation of the trunk and is commonly used in folk medicine as a tonic. For this study, the authenticity of commercial samples of jatobá was verified by the identification of the main compounds and multivariate analysis and ...
Katyuce de Souza Farias +10 more
wiley +1 more source
Establishment of adventitious root cultures of Peritassa campestris (Celastraceae) was achieved from seed cotyledons cultured in semisolid Woody Plant Medium (WPM) supplemented with 2% sucrose, 0.01% PVP, and 4.0 mg L−1 IBA. Culture period on accumulation of biomass and quinone‐methide triterpene maytenin in adventitious root were investigated.
Tiago Antunes Paz +6 more
wiley +1 more source
O emprego da fitorremediação na despoluição de solos contaminados com compostos orgânicos, inclusive herbicidas, vem sendo pesquisado ultimamente. Como o tebuthiuron pode causar sério impacto ambiental, por ser muito utilizado, apresentar longo efeito ...
F.R. Pires +6 more
doaj +1 more source
Libidibia ferrea has been used in folk medicine throughout Brazil, and this study evaluated the biological activities of crude extract (CE) as well as a partially purified fraction (F80) obtained from its pods. Results from the MTT assay revealed that only F80 inhibited NCI‐H292 cell growth; however, neither CE nor F80 reduced HEp‐2 cell growth or ...
A. C. C. Freitas +10 more
wiley +1 more source
Bioensaios de atividade alelopática dos esteroides espinasterol, espinasterona e glicopiranosil espinasterol [PDF]
Três esteroides (espinasterol, espinasterona e glicopiranosil espinasterol) foram isolados do caule de Moutabea guianensis, planta de origem amazônica. Suas estruturas foram determinadas a partir das análises de RMN e por comparação com dados espectroscópicos da literatura. Foram avaliadas as atividades alelopáticas das três substâncias em duas plantas
Ripardo Filho, H.S. +5 more
openaire +3 more sources
An oat bioassay was conducted in pots under greenhouse conditions to determine the persistence of atrazine, metribuzin and simazine herbicides in soils of the southeast of Buenos Aires Province, Argentina. Atrazine rates of 0, 0.58, 1.16 and 2.32 mug g-1
FEDERICO FUSCALDO +2 more
doaj +1 more source
Aborto polínico em Tradescantia pallida var. purpurea
Este estudo foi desenvolvido para testar a viabilidade do bioensaio aborto polínico (AP) em botões florais de Tradescantia pallida var. purpurea na avaliação de genotoxicidade da água superficial.
Luciana Rodrigues Nogueira +3 more
doaj +1 more source
The identification of rhG-CSF was carried out in pharmaceutical preparations by non-reducing polyacrylamide gel electrophoresis and western blotting with specific antibodies, showing a single band in the 19 kDa region.
Cristiane F. Codevilla +4 more
doaj +1 more source

