The use of advanced chemometric techniques and trace element levels for controlling the authenticity of organic coffee

Barbosa, Rommel M.; Batista, Bruno Lemos; Varrique, Renan M.; Coelho, Vinicius Azevedo; Campiglia, Andrés D.; Barbosa, Fernando

doi:10.1016/j.foodres.2013.07.060

Cited by 101 publications

(50 citation statements)

References 34 publications

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“…Bertrand et al (2008) reported Ca and Fe levels in Colombian green coffees about 2-3 times and 10-30 times higher, respectively, than those detected in the beverages; P, Mg and K levels were somewhat lower than the amounts reported in the present study (71-75% for P, 85-89% for Mg and 34-46% for K). Recently, Barbosa et al (2013) examined the application of advanced data mining techniques associated with trace element concentrations for authenticity evaluation of fifty-four organic and non-organic (conventional) Brazilian coffee beans. Authors reported Mn concentrations ranging from 1.73 to 3.03 mg/100 g in the conventional Brazilian coffees, which are 3-5 times higher than the Mn content observed in the espresso beverages.…”

Section: Mineral Compositionmentioning

confidence: 99%

“…to discriminate some of them based on coffee species (Grembecka et al, 2007;Martín, Pablos, & González, 1998, 1999, green, organic, ground, flavored and soluble coffee (Barbosa et al, 2013;dos Santos & de Oliveira, 2001;Fernandes et al, 2005;Grembecka et al, 2007;Martín et al, 1998Martín et al, , 1999Morgano, Pauluci, Mantovani, & Mory, 2002;Oliveira et al, 2012;Suseela, Bhalke, Kumar, Tripathi, & Sastry, 2001;Vega-Carrillo, Iskander, & Manzanares-Acuña, 2002) and geographical origin (Anderson & Smith, 2002;Bertrand et al, 2008;Krivan, Barth, & Morales, 1993;Oleszczuk et al, 2007). Information describing digested green and roasted ground coffee beans or infusions of instant coffees was found; none regarding espresso beverages (consumed global, and from pure sources) has been published.…”

Section: Introductionmentioning

confidence: 99%

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Espresso beverages of pure origin coffee: Mineral characterization, contribution for mineral intake and geographical discrimination

et al. 2015

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Section: Mineral Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Espresso beverages of pure origin coffee: Mineral characterization, contribution for mineral intake and geographical discrimination

et al. 2015

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“…The overall results indicated vis-NIR spectroscopy combined with ICA-LS-SVM provided accurate determination of trace elements in rice leaf. Other methods are reported by Xu et al [62] and Barbosa et al [63], among others.…”

Section: Nonlinear Calibration Models For Near-infrared Spectroscopymentioning

confidence: 99%

Near-Infrared Spectroscopy Combined with Multivariate Tools for Analysis of Trace Metals in Environmental Matrices

Nomngongo¹,

Munonde²,

Mpupa³

et al. 2017

Developments in Near-Infrared Spectroscopy

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Environmental contamination by trace elements is becoming increasingly important problem worldwide. Trace metals such as cadmium, copper, lead, chromium, and mercury are major environmental pollutants that are predominantly found in areas with high anthropogenic activities. Therefore, there is a need for rapid and reliable tools to assess and monitor the concentration of heavy metal in environmental matrices. A nondestructive, cost-effective, and environmentally friendly procedure based on near-infrared reflectance spectroscopy (NIRS) and chemometric tools has been used as alternative technique for the simultaneous estimation of various heavy metal concentrations in environmental sample. The metal content is estimated by assigning the absorption features of metals associated with molecular vibrations of organic and inorganic functional groups in organic matter, silicates, carbonates, and water at 780-2500 nm in the near-infrared region.This chapter, reviewed the application of NIRS combined with chemometric tools such as multiple linear regression (MLR), principal component regression (PCR), and partial least squares (PLS) regression. The disadvantages and advantages of each chemometric tool are discussed briefly.

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“…Standard statistical analysis (two-Sample z-TEST) and data mining algorithms (Haykin 2008;Aguiar et al 2012;Barbosa et al 2014) were used to compare glycosyl-residue compositions and glycome profiling data from different tissues and different treatments.…”

Section: Data Analysesmentioning

confidence: 99%

Xyloglucan, galactomannan, glucuronoxylan, and rhamnogalacturonan I do not have identical structures in soybean root and root hair cell walls

Muszyński

O’Neill

Ramasamy

et al. 2015

Planta

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Chemical analyses and glycome profiling demonstrate differences in the structures of the xyloglucan, galactomannan, glucuronoxylan, and rhamnogalacturonan I isolated from soybean ( Glycine max ) roots and root hair cell walls. The root hair is a plant cell that extends only at its tip. All other root cells have the ability to grow in different directions (diffuse growth). Although both growth modes require controlled expansion of the cell wall, the types and structures of polysaccharides in the walls of diffuse and tip-growing cells from the same plant have not been determined. Soybean (Glycine max) is one of the few plants whose root hairs can be isolated in amounts sufficient for cell wall chemical characterization. Here, we describe the structural features of rhamnogalacturonan I, rhamnogalacturonan II, xyloglucan, glucomannan, and 4-O-methyl glucuronoxylan present in the cell walls of soybean root hairs and roots stripped of root hairs. Irrespective of cell type, rhamnogalacturonan II exists as a dimer that is cross-linked by a borate ester. Root hair rhamnogalacturonan I contains more neutral oligosaccharide side chains than its root counterpart. At least 90% of the glucuronic acid is 4-O-methylated in root glucuronoxylan. Only 50% of this glycose is 4-O-methylated in the root hair counterpart. Mono O-acetylated fucose-containing subunits account for at least 60% of the neutral xyloglucan from root and root hair walls. By contrast, a galacturonic acid-containing xyloglucan was detected only in root hair cell walls. Soybean homologs of the Arabidopsis xyloglucan-specific galacturonosyltransferase are highly expressed only in root hairs. A mannose-rich polysaccharide was also detected only in root hair cell walls. Our data demonstrate that the walls of tip-growing root hairs cells have structural features that distinguish them from the walls of other roots cells.

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The use of advanced chemometric techniques and trace element levels for controlling the authenticity of organic coffee

Cited by 101 publications

References 34 publications

Espresso beverages of pure origin coffee: Mineral characterization, contribution for mineral intake and geographical discrimination

Espresso beverages of pure origin coffee: Mineral characterization, contribution for mineral intake and geographical discrimination

Near-Infrared Spectroscopy Combined with Multivariate Tools for Analysis of Trace Metals in Environmental Matrices

Xyloglucan, galactomannan, glucuronoxylan, and rhamnogalacturonan I do not have identical structures in soybean root and root hair cell walls

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