L
Leandro Rocha
Researcher at Federal Fluminense University
Publications - 103
Citations - 1673
Leandro Rocha is an academic researcher from Federal Fluminense University. The author has contributed to research in topics: Essential oil & Biology. The author has an hindex of 19, co-authored 91 publications receiving 1321 citations. Previous affiliations of Leandro Rocha include Universidade Federal do Estado do Rio de Janeiro & University of Lausanne.
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Journal ArticleDOI
Antibacterial Phloroglucinols and Flavonoids from Hypericum brasiliense
Leandro Rocha,Andrew Marston,Olivier Potterat,Maria Auxiliadora Coelho Kaplan,Helen Stoeckli-Evans,Kurt Hostettmann +5 more
TL;DR: Four phloroglucinols have been isolated from a petrol extract of the leaves and flowers of Hypericum brasiliense and were antibacterial against Bacillus subtilis in a TLC bioautographic assay.
Journal ArticleDOI
An antifungal γ-pyrone and xanthones with monoamine oxidase inhibitory activity from Hypericum brasiliense
Leandro Rocha,Andrew Marston,M. Auxiliadora,C. Kaplan,C. Kaplan,Helen Stoeckli-Evans,Helen Stoeckli-Evans,Ulrike Thull,Bernard Testa,Bernard Testa,Kurt Hostettmann +10 more
TL;DR: A new gamma-pyrone (hyperbrasilone), three known xanthones (1,5-dihydroxyxanthones, 5-hydroxy-1-methoxyxanthone and 6-deoxyjacareubin) and betulinic acid have been isolated from a dichloromethane extract of stems and roots of Hypericum brasiliense.
Journal ArticleDOI
More phloroglucinols from Hypericum brasiliense
Leandro Rocha,Andrew Marston,Olivier Potterat,Maria Auxiliadora Coelho Kaplan,Kurt Hostettmann +4 more
TL;DR: Three new phloroglucinols have been isolated from a petrol extract of the leaves and flowers of Hypericum brasiliense by spectroscopic methods including two-dimensional-NMR heteronuclear correlations.
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Development of an insecticidal nanoemulsion with Manilkara subsericea (Sapotaceae) extract
Caio P. Fernandes,Caio P. Fernandes,Fernanda B. de Almeida,Amanda Nunes Silveira,Marcelo S. Gonzalez,Cicero B. Mello,Denise Feder,Raul Apolinário,Marcelo Guerra Santos,José Carlos Tavares Carvalho,Luis A. C. Tietbohl,Leandro Rocha,Deborah Quintanilha Falcão +12 more
TL;DR: The present study suggests that the obtained O/A nanoemulsion may be useful to enhance water solubility of poor water soluble natural products with insecticidal activity, including the hexane-soluble fraction from ethanolic crude extract from fruits of Manilkara subsericea.
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HLB value, an important parameter for the development of essential oil phytopharmaceuticals
Caio P. Fernandes,Manuela P. Mascarenhas,F. M. Zibetti,Barbara G. Lima,Rafael P.R.F. Oliveira,Leandro Rocha,Deborah Quintanilha Falcão +6 more
TL;DR: In this paper, the lowest mean droplet diameters for R. offi cinalis and I. verum emulsions were obtained at HLB 16.5 (97.12 nm) and 16.7 (246.6 nm), respectively.