A5058868977- Coffee research and impacts
- Essential Oils and Antimicrobial Activity
- Phytochemistry Medicinal Plant Applications
- Agricultural and Food Sciences
- Plant biochemistry and biosynthesis
- Analytical Chemistry and Chromatography
- Fermentation and Sensory Analysis
- Sesquiterpenes and Asteraceae Studies
- Advanced Chemical Sensor Technologies
- Phytochemistry and Biological Activities
- Pesticide Residue Analysis and Safety
- Tea Polyphenols and Effects
- Food Chemistry and Fat Analysis
- Biological Activity of Diterpenoids and Biflavonoids
- Natural product bioactivities and synthesis
- Plant and animal studies
- Marine Sponges and Natural Products
- Chemistry and Chemical Engineering
- Phytochemical compounds biological activities
- Mass Spectrometry Techniques and Applications
- Phytochemicals and Antioxidant Activities
- Bioactive Natural Diterpenoids Research
- Botanical Research and Applications
- Plant-Derived Bioactive Compounds
- Plant Toxicity and Pharmacological Properties
Universidade Federal do Rio de Janeiro
2016-2025
Comissão Executiva do Plano da Lavoura Cacaueira
2022
Centro Universitário da Cidade
2014-2017
Universidade do Estado do Rio de Janeiro
2017
Comparative Aircraft Flight Efficiency Foundation
2013
Universidade Federal de Goiás
2012
Sociedade Brasileira de Pesquisa Odontológica
2011
Universidade Brasil
2005
Universidade Estadual Paulista (Unesp)
2004
Universidade Federal Fluminense
2004
VIEW, DEVELOPMENTS AND PERSPECTIVES.Essential oils are extracted by steam distillation of plants or cold pressing citrus fruit pericarp.They used in food, cosmetic, personal care and pharmaceutical industries.In Brazil, from orange related products contribute to near 97% the positive commercial performance sector.Predatory exploitation availability new sources raw materials, with more attracting prices, changed paradigm.Prospective studies, sustainable use Brazilian biodiversity,...
ABSTRACT In this study, we show the leishmanicidal effects of a chloroform fraction (CLF) and purified indole alkaloid obtained from crude stem extract Peschiera australis against Leishmania amazonensis , causative agent cutaneous leishmaniasis in New World. bioassay-guided chemical fractionation, activity CLF completely irreversibly inhibited promastigote growth. This was also active amastigotes infected murine macrophages. Chemical analysis identified an iboga-type coronaridine as one its...
This study tested in vitro activity of the essential oil from flowers Calendula officinalis using disk-diffusion techniques. The antifungal assay results showed for first time that has good potential activity: it was effective against all 23 clinical fungi strains tested.
The seasonal variation of the chemical composition essential oil from fresh leaves Tetradenia riparia (Hochst.) Codd grown in southern Brazil was analyzed by GC-MS, and analgesic antimicrobial activities this were assayed. yield ranged 0.17% to 0.26%, with maximum amount winter minimum spring. results obtained principal components analysis (PCA) revealed existence high variability different seasons. samples clearly discriminated into three groups: winter, autumn, spring-summer. Samples...
Considering that illegal admixture of robusta coffee into high-quality arabica is an important task in analysis, we evaluated the use direct-infusion electrospray ionization-mass spectrometry (ESI-MS) data combined with partial least-squares (PLS) multivariate calibration technique as a fast way to detect and quantify adulterations by coffee. A total 16 PLS models were built using ESI± quadrupole time-of-flight (QTOF) Fourier transform ion cyclotron resonance (FT-ICR) MS from hot aqueous...
Tetradenia riparia (Lamiaceae) is a well-known herbal medicine with variety of useful properties, including its acaricidal effect. This experiment was carried out to study the bioacaricidal activity T. essential oil (EO) against engorged females Rhipicephalus (Boophilus) microplus (Acari; Ixodidae). For this purpose, nine serial concentrations (12.50%, 6.25%, 3.75%, 1.80%, 0.90%, 0.45%, 0.22%, 0.11%, and 0.056% w/v) were used for adult immersion test (AIT). larval packet (LPT), we 14...
Carboxymethyl cellulose (CMC)-based films were developed by incorporating green coffee oil (GCO) obtained cold pressing and hydroalcoholic extracts of its residues. The effect cake (CE) sediment (SE) in different proportions (20–40%) GCO on chemical, morphological, physical, mechanical, optical, antioxidant properties the was investigated. Eight fatty acids four major phenolic compounds identified High-Resolution Direct-Infusion Mass Spectrometry residue extracts. FTIR indicated interactions...
Direct infusion electrospray ionization mass spectrometry in both the negative ESI(-)-MS and positive ESI(+)-MS ion modes are investigated to differentiate green roasted Arabica coffees with different stages of ripeness (green, ripe overripe), post-harvesting process (dry, wet semi-wet) cup qualities. In coffees, ions from deprotonated fatty acids chlorogenic most important for discrimination. ESI(+)-MS, maturity is differentiated by protonated caffeine, K+ adducts acids. To between modes,...
Green beans of Coffea arabica (arabica coffee) cultivars with Sarchimor and Catuaí genetic background were grown under the same edaphoclimatic conditions, in two different regions, analysed by direct-infusion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) followed a metabolomic approach. A total 20 coffee metabolites including phenolic compounds, fatty acids, sucrose, diterpene glycosides identified negative ESI MS error <2 ppm....
Tetradenia riparia (Hochstetter) Codd belongs to the Lamiaceae family and it was introduced in Brazil as an exotic ornamental plant. A previous study showed its antimicrobial, acaricidal analgesic activities. Two compounds were isolated from essential oil of T. leaves identified 9β,13β-epoxy-7-abietene (1), a new one, 6,7-dehydroroyleanone (2), already reported for another The structure these determined by spectroscopic analysis comparison with literature data. cytotoxic activities 1 2...
The volatile fraction of murici, bacuri and sapodilla are here studied because their increasing interest for consumers, abundance production in Brazil, the general demand new flavors aromas. Their profiles were by two High Concentration Capacity Headspace techniques (HCC-HS), Solid Phase Microextraction (HS-SPME) Sorptive Extraction (HSSE), combination with GC–MS. Murici mainly contains esters (38%), carboxylic acids (19%), aldehydes (11%), alcohols (14%), others (13%) sulfur compounds; is...
Copaifera multijuga Hayne (Leguminosae) is a tree that produces an oleoresin, which extensively commercialized in Brazil as capsules or crude oil for the treatment of several disorders. Ethnopharmacological studies show diversity indications such anti-inflammatory and epidermal wound cicatrization.In present work three fractions obtained from oleoresin (hexane (HF), chloroform (CF), methanol (MF) KOH impregnated silica gel column chromatography, representing main classes compounds genus...
Here we explore the application of ambient ionization technique paper spray mass spectrometry (PS-MS) combined with multivariate statistical tools principal component analysis and hierarchical cluster as a fast simple method to discriminate green arabica coffee beans from three different origins in Brazil. PS-MS does not require nebulizing gas or complex protocols for sample preparation by 5 μL whole bean extracts it was possible origin. Furthermore, report direct single using slice also...
A new gas chromatography method using pulsed split injector (PS-GC) was validated to quantify thermolabile diterpenes cafestol, kahweol and isokahweol in methanolysed Arabica coffee oils. Linearity 0.99 from 8 69mgmL(-1), recovery ranged 99% 101% precision of less than 4% obtained. Besides, Soxhlet extraction time evaluated Tukey׳s test indicated that the mass obtained 4h is equivalent a 16h period, which represents space-time yield four times higher. The microwave assisted methanolysis...