Results 41 to 50 of about 1,651 (165)

Biochemical and Biological Profile of Parotoid Secretion of the Amazonian Rhinella marina (Anura: Bufonidae)

open access: yesBioMed Research International, Volume 2019, Issue 1, 2019., 2019
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

Potencial de lixiviação de herbicidas no solo submetidos a diferentes simulações de precipitação Leaching potential of herbicides in soil under different rainfall simulations

open access: yesPlanta Daninha, 2008
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

open access: yesEvidence-Based Complementary and Alternative Medicine, Volume 2017, Issue 1, 2017., 2017
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

Production of the Quinone‐Methide Triterpene Maytenin by In Vitro Adventitious Roots of Peritassa campestris (Cambess.) A.C.Sm. (Celastraceae) and Rapid Detection and Identification by APCI‐IT‐MS/MS

open access: yesBioMed Research International, Volume 2013, Issue 1, 2013., 2013
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

Fitorremediação de solos contaminados com tebuthiuron utilizando-se espécies cultivadas para adubação verde Phytoremediation of tebuthiuron-contaminated soils using species cultivated for green manure

open access: yesPlanta Daninha, 2005
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

Biological Activities of Libidibia (Caesalpinia) ferrea var. parvifolia (Mart. ex Tul.) L. P. Queiroz Pod Preparations

open access: yesEvidence-Based Complementary and Alternative Medicine, Volume 2012, Issue 1, 2012., 2012
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]

open access: yesPlanta Daninha, 2012
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

PERSISTENCE OF ATRAZINE, METRIBUZIN AND SIMAZINE HERBICIDES IN TWO SOILS PERSISTÊNCIA DOS HERBICIDAS ATRAZINE, METRIBUZIN E SIMAZINE EM DOIS SOLOS

open access: yesPesquisa Agropecuária Brasileira, 1999
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

open access: yesRevista Thema
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

Biological potency evaluation and characterization of rhG-CSF in pharmaceutical products Avaliação biológica da potência e caracterização de rhG-CSF em produtos farmacêuticos

open access: yesRevista Brasileira de Hematologia e Hemoterapia, 2004
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

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