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Age and time related pheromone production in coffee leafminer Leucoptera coffeella Guérin-Méneville (Lepidoptera: Lyonetiidae)

Lima, Eraldo R.; Vilea, Evaldo F.; Lucia, Terezinha M. C. Della; Ataíde, Lívia M. S. (Sociedade Brasileira de Química, 2008)

This study was undertaken to access the pattern of sex pheromone production in glands of virgin females of Leucoptera coffeella as an indirect measure of the calling behavior. The major compound, 5,9-dimethylpentadecane ...
Ambient mass spectrometry employed for direct analysis of intact arabica coffee beans

Garrett, Rafael; Schwab, Nicolas V.; Cabral, Elaine C.; Henrique, Brenno V. M.; Ifa, Demian R.; Eberlin, Marcos N.; Rezende, Claudia M. (Sociedade Brasileira de Química, 2014)

The ambient ionization mass spectrometry techniques: desorption electrospray ionization (DESI) and easy ambient sonic-spray ionization (EASI) were explored as fast and simple ways to directly analyze the surface of intact ...
Application of carbon composite adsorbents prepared from coffee waste and clay for the removal of reactive dyes from aqueous solutions

Santos, Davis C. dos; Adebayo, Matthew A.; Lima, Eder C.; Pereira, Simone F. P.; Cataluña, Renato; Sauier, Caroline; Thue, Pascal S.; Machado, Fernando M. (Sociedade Brasileira de Química, 2015)

A novel carbon composite was prepared from a mixture of coffee waste and clay with inorganic:organic ratio of 1.3 (CC-1.3). The mixture was pyrolysed at 700 °C. Considering the application of this adsorbent for removal of ...
Boron isotope dilution in cellular ractions of coffee leaves evaluated by inductively coupled plasma mass spectrometry with direct injection nebulization (DIN-ICP-MS)

Bellato, Ana Cláudia S.; Menegário, Amauri A.; Giné, Maria Fernanda (Sociedade Brasileira de Química, 2003)

Enriched 10B (94.14 atom %) was supplied to coffee plantlets for three months. Then boron isotope ratios were determined in the leaf cell compartments, cell wall, nuclei and chloroplast, after a sub-cellular fractionation ...
Chemometric analysis of UV characteristic profile and infrared fingerprint variations of Coffea arabica green beans under different space management treatments

Terrile, Amélia E.; Marcheafave, Gustavo G.; Oliveira, Guilherme S.; Rakocevic, Miroslava; Bruns, Roy E.; Scarminio, Ieda S. (Sociedade Brasileira de Química, 2016)

Ultraviolet characteristic profiles and infrared spectroscopic (FTIR) fingerprints of green bean extracts of Coffea arabica L., cv. IAPAR 59, cultivated in two planting patterns, rectangular and square, and at two different ...
Comparative studies of the sample decomposition of green and roasted coffee for determination of nutrients and data exploratory analysis

Amorim Filho, Volnei R.; Politoa, Wagner L.; Gomes Neto, José A. (Sociedade Brasileira de Química, 2007)

The contents of some nutrients in 35 Brazilian green and roasted coffee samples were determined by flame atomic absorption spectrometry (Ca, Mg, Fe, Cu, Mn, and Zn), flame atomic emission photometry (Na and K) and Kjeldahl ...
Comparative study of metal contents in Brazilian coffees cultivated by conventional and organic agriculture applying principal component analysis

Santos, José S. dos; Santos, Maria Lúcia P. dos; Conti, Melina M. (Sociedade Brasileira de Química, 2010)

The aim of this study was to evaluate of availability of nutrients and toxic elements in green coffees produced in traditional, technological and transitional organic farms in Southwest BahiaBrazil. Levels of the nutrients ...
Comparison of extraction methods for kahweol and cafestol analysis in roasted coffee

Dias, Rafael C. E.; Faria, Adelia F. de; Mercadante, Adriana Z.; Bragagnolo, Neura; Benassi, Marta de T. (Sociedade Brasileira de Química, 2013)

Kahweol and cafestol, diterpenes from the unsaponifiable fraction of coffee, present known effects on human health such as anticarcinogenic and hipercholesterolemic activities. There are discrepancies regarding the levels ...
Development of a Disposable Pipette Extraction Method Using Coffee Silverskin as an Adsorbent for Chromium Determination in Wastewater Samples by Solid Phase Extraction

Silva, Weida R.; Costa, Bruno E. S.; Batista, Alex D.; Alves, Vanessa N.; Coelho, Nivia M. M. (Sociedade Brasileira de Química, 2022-05-02)

A procedure using disposable pipette tips adapted for solid-phase extraction, known as DPX SPE, was used as an alternative way for the chromium determination in wastewater samples. DPX-SPE consists of a device which allows ...
Differential scanning calorimetry and infrared spectroscopy combined with chemometric analysis to the determination of coffee adulteration by corn

Brondi, Ariadne M.; Torres, Claudia; Garcia, Jerusa S.; Trevisan, Marcello G. (Sociedade Brasileira de Química, 2017)

Roasted and ground coffee is targeted by fraudulent addiction of products. In this way the determination of contaminants in coffee has economic and nutritional importance. In this study, the coffee adulteration by corn ...
Discrimination of commercial roasted and ground coffees according to chemical composition

Souza, Romilaine M. N. de; Benassi, Marta T. (Sociedade Brasileira de Química, 2012)

Roasted and ground 38 commercial coffees and coffees of known species (arabica, robusta) were characterized by principal component analysis using as variables nicotinic acid, trigonelline, 5-o-caffeoylquinic acid (5-CQA), ...
Evaluation of the bioaccessability of Ca, Fe, Mg and Mn in ground coffee infusions by in vitro gastrointestinal digestion

Stelmach, Ewelina; Pohl, Pawel; Szymczycha-Madeja, Anna (Sociedade Brasileira de Química, 2014)

The bioaccessibility of Ca, Mg, Mn and Fe in ground coffee brews was assessed through in vitro gastrointestinal digestion with stomach and intestinal juice solutions (pepsin, pancreatin and bile salts). Absorption of metals ...
Evaluation of the metabolic profile of arabica coffee via NMR in relation to the time and temperature of the roasting procedure

Alves, Roger P.; Antoniosi Filho, Nelson R.; Lião, Luciano M.; Flores, Igor S. (Sociedade Brasileira de Química, 2021)

Coffee is one of the most popular and consumed products in the world, with high nutritional value and economic importance. However, some factors can change the organoleptic properties of a coffee species, without causing ...
Extracts of the Native Brazilian Tree Garcinia gardneriana Inhibit Urediniospore Germination of Coffee Leaf Rust Fungus

Silva, Ueveton P. da; Ferreira, Bruno W.; Sousa, Bianca L. de; Furlani, Gabriela M.; Barreto, Robert W.; Agrizzi, Ana Paula; Leite, João Paulo V.; Santos, Marcelo H. dos; Varejão, Eduardo V. V. (Sociedade Brasileira de Química, 2022-02-21)

The fungal Hemileia vastatrix is the causal agent of coffee leaf rust, one of the worst and devastating disease in coffee cultures worldwide. As a result of our research on natural products for the development of novel ...
Green and roasted arabica coffees differentiated by ripeness, process and cup quality via electrospray ionization mass spectrometry fingerprinting

Amorim, Ana Carolina L.; Hovell, Ana Maria C.; Pinto, Angelo C.; Eberlin, Marcos N.; Arruda, Neusa P.; Pereira, Elenilda J.; Bizzo, Humberto R.; Catharino, Rodrigo R.; Morais Filho, Zenildo B.; Rezende, Claudia M. (Sociedade Brasileira de Química, 2009)

Direct infusion electrospray ionization mass spectrometry in both the negative ESI(-)-MS and positive ESI(+)-MS ion modes are investigated to differentiate green and roasted Arabica coffees with different stages of ripeness ...
Integrated chemometric approach to optimize sample preparation for detecting metabolic changes provoked by abiotic stress in Coffea arabica L. leaf fingerprints

Marcheafave, Gustavo G.; Tormena, Cláudia D.; Afoso, Sabrina; Rakocevic, Miroslava; Bruns, Roy E.; Scarminio, Ieda S. (Sociedade Brasileira de Química, 2019)

The effects of water-deficit stress on irrigated and unirrigated field plants of Coffea arabica L. genotype IAPAR 59 were investigated. Plant extracts were obtained following an ethanoldichloromethane-hexane statistical ...
Irrigation and light acess effects on Coffea arabica L. leaves by FTIR-chemometric analysis

Sanchez, Patrícia M.; Pauli, Elis D.; Scheel, Guilherme L.; Rakocevic, Miroslava; Brunsc, Roy E.; Scarminio, Ieda S. (Sociedade Brasileira de Química, 2018)

Coffee bean chemical compositions has been extensively studied. However, there is a small amount of research on other parts of the coffee plant, including leaves. Fourier transform infrared (FTIR) spectral profiles of ...
Production and characterization of the bio-oil obtained by the fast pyrolysis of spent coffee grounds of the soluble coffee industry

Krause, Maurício C.; Moitinho, Adriana C.; Ferreira, Luiz Fernando R.; Souza, Ranyere L. de; Krause, Laiza C.; Caramão, Elina B. (Sociedade Brasileira de Química, 2019)

Agro-industrial wastes are abundant and low-cost sources of energy and chemicals. Biomass account for 14% of the world’s energy production. Industrial residues of production of soluble coffee (spent coffee grounds - SCG) ...
Sistematic study of benzo[a]pyrene in coffee samples

Badolato, Elza S. G.; Martins, Maristela S.; Aued-Pimentel, Sabria; Alaburda, Janete; Kumagai, Edna E.; Baptista, Gisleine G.; Rosenthal, Amaury (Sociedade Brasileira de Química, 2006)

A method for extracting and quantifying benzo[a]pyrene (B[a]P) was evaluated and improved for samples of green and roasted ground Arabica (Coffea arabica) and Conillon (Coffea canephora) Brazilian coffees. The influence ...
A solid-phase microextraction method for the chromatographic determination of organophosphorus pesticides in fish, water, potatoes, guava and coffee

Capobiango, Helena L. V.; Cardeal, Zenilda L. (Sociedade Brasileira de Química, 2005)

This paper describes a Solid Phase Microextraction method (SPME-CG) to the determination of organophosphorus pesticides in samples of fresh-water fish, water, potatoes, guava and coffee by capillary gas chromatography with ...