Carbon isotopic composition of Mexican honey

Cienfuegos, Edith; Casar, Isabel; Luque, P.A.

doi:10.1080/00218839.1997.11100945

Cited by 18 publications

(6 citation statements)

References 9 publications

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“…Stable-isotope signatures were determined by using a triple-collector mass spectrometer (MAT 250) with a precision of ±0.2&, and using the methods of Cienfuegos et al (1997). The ratios of 13 C/ 12 C were reported in conventional d notation, as parts per thousand (&), where the ratio of the sample is compared to that carbonate PeeDee Belemnite standard (PDB) as…”

Section: Laboratory Techniques D 13 C Determinationsmentioning

confidence: 99%

Stable carbon isotope ratios for the gray whale (Eschrichtius robustus) in the breeding grounds of Baja California Sur, Mexico

Caraveo-Patiño¹,

Soto

2005

Hydrobiologia

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This work investigated the feeding ecology and behaviour of gray whales in Bahı´a Magdalena. Underwater observations of bottom feeding were made (n ¼ 4). Skin biopsies of the gray whale had a carbon isotope value of )16.5 ± 0.1& (range from )16.4 to )16.7, n ¼ 7). Prey in Bahı´a Magdalena had a carbon isotope value of )18.4&. Dietary enrichment from prey in Bahı´a Magdalena would correspond to 2 ± 0.1&, whereas previously published results for prey in Alaska would result in an enrichment of 3&, which suggests that whales were more likely feeding on prey from Bahı´a Magdalena. Carbon isotopic oscillation along the baleen plate of a stranded 1-year-old whale showed a variation in diet during the year, which suggests continual feeding during this time and corresponding to dietary sample measurements from Bahı´a Magdalena in winter and Alaska in summer.

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Section: Laboratory Techniques D 13 C Determinationsmentioning

confidence: 99%

Stable carbon isotope ratios for the gray whale (Eschrichtius robustus) in the breeding grounds of Baja California Sur, Mexico

Caraveo-Patiño¹,

Soto

2005

Hydrobiologia

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“…Because of its nutritional value and unique flavour, the price of natural bee honey is much higher than that of the other sweeteners, such as refined cane sugar, beet sugar, and corn syrup; therefore, is susceptible to be adulterated with these cheaper sweeteners. Adulteration of honey is in constant progress and has been reported in various occasions (Cienfuegos, Casar, & Morales, 1997;Gonzalez, Márquez, Sanchez, & Gonzalez, 1998;Tien & Shau, 1997).…”

Section: Introductionmentioning

confidence: 97%

Application of FTIR-HATR spectroscopy and multivariate analysis to the quantification of adulterants in Mexican honeys

Gallardo-Velázquez¹,

Osorio-Revilla²,

Loa³

et al. 2009

Food Research International

176

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“…Adulteration of bee honey with cheaper sweetening materials has been widely reported in the literature. [5][6][7] In Saudi Arabia, honey adulteration is performed by mixing with cheap imported honey, diluting with water, and/or addition of glucose syrup. Sometimes producers 3 of authentic honey are obliged to artificially feed bees with glucose syrups, due to the lack of natural flora or the cost associated with moving the bee colony to areas rich with natural flora.…”

Section: Introductionmentioning

confidence: 99%

Glucose Adulteration in Saudi Honey with Visible and Near Infrared Spectroscopy

Mouazen

Al-Walaan

2014

International Journal of Food Properties

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This paper reports on the implementation of visible and near infrared spectroscopy (vis-NIRS) for the detection of glucose concentration in a mixture of Saudi and imported honey samples adulterated by glucose syrup of five concentrations of 0, 5, 12, 19 and 33 g/100 g. Honey samples were scanned in trans-reflectance mode with an AgroSpec mobile, fibre type, vis-NIR spectrophotometer (tec5 Technology for Spectroscopy, Germany), with a measurement range of 305-2200 nm. The entire data set of 345 spectra was randomly divided into calibration (70 %) and prediction (30 %) sets. The first group was subjected to a partial least squares (PLS) regression analysis with a leave-one-out cross-validation to establish a calibration model for the prediction of glucose concentration, whereas the second group was used to validate the PLS model. For the cross-validation the values for root mean square error of prediction (RMSEP), coefficient of determination (R 2) and ratio of prediction deviation (RPD), which is the standard deviation divided by RMSEP were 4.52 g/100 g, 0.85, and 2.53, respectively. A slightly lower range of accuracy was obtained in the prediction set, with RMSEP, R 2 and RPD values of 5.56 g/100 g, 0.78 and 2.06, respectively. The results achieved suggest that

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Carbon isotopic composition of Mexican honey

Cited by 18 publications

References 9 publications

Stable carbon isotope ratios for the gray whale (Eschrichtius robustus) in the breeding grounds of Baja California Sur, Mexico

Stable carbon isotope ratios for the gray whale (Eschrichtius robustus) in the breeding grounds of Baja California Sur, Mexico

Application of FTIR-HATR spectroscopy and multivariate analysis to the quantification of adulterants in Mexican honeys

Glucose Adulteration in Saudi Honey with Visible and Near Infrared Spectroscopy

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