Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 27 July 2010

M.T., Pérez-Corona , M, Sánchez-Martínez , M.J., Valderrama , M.E, Rodríguez , C, Cámara , ...

The main purpose of this laboratory-scale study was to evaluate the transformation of inorganic selenium, as sodium selenite, when added to white grape juice as part of the fermentation process of white wine. The participation of yeast, added in the fermentation of the must, is necessary to convert inorganic selenium into organoseleno species. Two different yeasts, Saccharomyces cerevisiae and Saccharomyces Bayanus were used for fermentation. The effects of different Se concentrations on cells and their viability during fermentation were evaluated. The alcoholic fermentation that produced wine was not affected by the presence of selenium, regardless of the type of Saccharomyces...

Publication year: 2010
Source: Food Chemistry, In Press, Corrected Proof, Available online 27 July 2010

Bonadies, Francesco , Berardi, Giorgio , Nicoletti, Rosario , Romolo Francesco, Saverio , De Giovanni, Francesco , ...

We describe a new method to detect trace levels of ptaquiloside (Pta), a major carcinogen of bracken fern in biological samples such as milk from farm animals. The method involves the absorption of analyte on carbograph followed by elution with solvents mixtures. The unstable analyte is then converted into Br-Pt (II), which is specific for Pta, as it is not a natural decay product of the glycoside in aqueous media. An internal standard, the Br-pterosine-d2, prepared in our laboratories has been used. Detection and quantification are possible with gas chromatography/mass spectrometry (GC/MS) in single ion monitoring mode (SIM). The detectable...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 27 July 2010

Chee-Yuen, Gan , Aishah A., Latiff

Central composite design was employed to optimise the buffer-to-solids ratio (X1: 2050 ml/g), incubation temperature (X2: 3555 °C) and time (X3: 100200 min), obtaining extracts from Parkia speciosa pod with high total phenolic and flavonoid contents and high antioxidant activities. Analysis of variance showed that the contribution of a quadratic model was significant for the responses. An optimisation study using response surface methodology was performed and 3-D response surfaces were plotted from the mathematical models. The optimal conditions based on combination responses were:X2 = 20 ml/g, X2 = 3536 °C and X3 = 100102 min. These optimum conditions yielded total...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

M., Cirlini , A., Caligiani , L., Palla , G., Palla

Head-space solid-phase microextraction (HS-SPME) coupled with GC-MS analysis has been applied for the determination of the characteristic volatile profile of a typical Italian product: the “Balsamic Vinegar of Modena” (BVM) with the aim to distinguish the less matured products (matured in wooden barrels for at least 60 days) from the aged ones (aged in wooden barrels for at least 3 years). Moreover, coupling the HS-SPME/GC-MS analysis data with multivariate statistical techniques, such as Principal Components Analysis (PCA) and Classification Trees (CT), it has been possible to classify the balsamic vinegars of Modena on the basis of different maturation and ageing...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

Baiyi, Lu , Huafang, Cai , Weisu, Huang , Xiaoqin, Wu , Yanxi, Luo , ...

This study aim to investigate the protective effects of bamboo shoot oil (BSO) and its mechanisms on nonbacterial prostatitis (NBP). The anti-prostatitis effect of BSO were evaluated by prostate weight, acid phosphatase, density of lecithin corpuscles (DLCC), white blood cell count (WBC), and prostatic histomorphological parameters using Xiaozhiling- induced experimental NBP model in rats. The mechanisms of anti-prostatitis effect were assessed using functionally focused cDNA microarray and real-time PCR. BSO could significantly inhibited absolute prostate weight, prostate index, total acid phosphatase, prostatic acid phosphatase, WBC and the expression levels of thirty up-regulated genes, while BSO could significantly increased DLCC and...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

Enos Tangke, Arung , Shoko, Furuta , Hiroya, Ishikawa , Irawan Wijaya, Kusuma , Kuniyoshi, Shimizu , ...

In an effort to find a new whitening agent, we have found that the methanol extract of the dried skin of Allium cepa showed inhibition of melanin formation. Bioassay-guided fractionation led to the isolation of quercetin (1) and quercetin 4’-O-β-glucoside (3) from A. cepa as the inhibitors of melanin formation in B16 melanoma cells with IC50 values of 26.5 and 131 μM, respectively. In addition, we evaluated the effect of some quercetin derivatives, such as isoquercitrin (2), quercetin 3, 4’-O-diglucoside (4), rutin (5) and hyperin (6) on B16 melanoma cells. These quercetin derivatives did not show any inhibition of melanin...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

J.E., Pardo , M.A., Cuesta , A., Alvarruiz , J.D., Granell , M., Álvarez-Ortí

The potential and real qualities of virgin olive oils, from the Designation of Origin (DO) “Aceite Montes de Alcaraz”, were evaluated. The regulated physicochemical and sensory parameters, the stability parameters and the fatty acid, sterol and triterpenic dialcohol compositions were analyzed. The results of the regulated parameters in the potential quality study classified all the analyzed oils into the “extra virgin” category. The varieties Picual and Cornicabra showed remarkably high stability, due to their high total polyphenol content. The fatty acid contents fell within the intervals required by the EU regulations in all the analyzed samples. The distribution of fatty...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

Ghasem, Haghi , Alireza, Hatami , Rohollah, Arshi

The caffeic acid derivatives including neochlorogenic acid (3-COA), cryptochlorogenic acid (4-CQA), chlorogenic acid (5-CQA) and caffeic acid (CA) have been characterized in Gundelia tournefortii using reference compounds, chemical, spectral evidences and chromatographic data. In addition, the total phenolic content and chlorogenic acid were measured in the leaf, hull-less seed, and skin extracts of this herb by the Folin-Ciocalteu reagent and high performance liquid chromatography (HPLC), respectively. The sample analysis was carried out on a C18 column with 5% (v/v) aqueous acetic acid and methanol as the mobile phase, under gradient elution at ambient temperature, at 325 nm. The amount of...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

G., Luciano , V., Vasta , F.J., Monahan , P., López-Andrés , L., Biondi , ...

Fourteen lambs were individually penned for 60 days. Seven lambs (C) were fed a barley-based concentrate, while 7 animals (T) received the same concentrate supplemented with 8.96% (dry matter basis) quebracho (Schinopsis lorentzii) extract. Tannin supplementation extended colour stability of fresh longissimus dorsi muscle (LM) over 7 days of aerobic storage with lower changes in hue angle over time in LM from T-fed animals compared to C-fed lambs (P = 0.032). Muscle from T-fed lambs had lower metmyoglobin percentages (MMb%) than that from C-fed animals after 3 days of storage (P = 0.05) and tended to have slower rates of...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

S., Damjanovic Desic , I., Birlouez-Aragon

Infant formulas are highly sensitive to the Maillard reaction during manufacturing, while this reaction induces significant loss in protein nutritional value and safety. The indicators mostly used to monitor the reaction during heat treatment are furosine, carboxymethyllysine and hydroxymethylfurfural, but analysis of these molecules is time-consuming and expensive. The FAST method, based on simple fluorescence measurements on clear milk supernatant, is a good alternative for Maillard reaction monitoring in milk products.The aim of this study was to determine the respective sensitivity of the various indicators of heat damage to infant formula, including the FAST index. A realistic infant formula model...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

B.A., Goodman , E.C., Pascual , C., Yeretzian

Because of the roles of free radicals in the formation of Maillard reaction products and as markers of oxidation processes in foods, the dynamics of free radical generation during the roasting of coffee beans have been measured, and some exploratory investigations conducted on the extent to which these are influenced by the bean type, and the atmosphere (air vs. N2), in which the beans were roasted and cooled.The intensities of the free radical signals from individual Arabica and Robusta coffee beans were measured continuously in an EPR spectrometer, whilst beans underwent heating/cooling cycles in air or N2 atmospheres. Additional EPR...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

M., Cirlini , A., Caligiani , L., Palla , G., Palla

Head-space solid-phase microextraction (HS-SPME) coupled with GC-MS analysis has been applied for the determination of the characteristic volatile profile of a typical Italian product: the “Balsamic Vinegar of Modena” (BVM) with the aim to distinguish the less matured products (matured in wooden barrels for at least 60 days) from the aged ones (aged in wooden barrels for at least 3 years). Moreover, coupling the HS-SPME/GC-MS analysis data with multivariate statistical techniques, such as Principal Components Analysis (PCA) and Classification Trees (CT), it has been possible to classify the balsamic vinegars of Modena on the basis of different maturation and ageing...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

Baiyi, Lu , Huafang, Cai , Weisu, Huang , Xiaoqin, Wu , Yanxi, Luo , ...

This study aim to investigate the protective effects of bamboo shoot oil (BSO) and its mechanisms on nonbacterial prostatitis (NBP). The anti-prostatitis effect of BSO were evaluated by prostate weight, acid phosphatase, density of lecithin corpuscles (DLCC), white blood cell count (WBC), and prostatic histomorphological parameters using Xiaozhiling- induced experimental NBP model in rats. The mechanisms of anti-prostatitis effect were assessed using functionally focused cDNA microarray and real-time PCR. BSO could significantly inhibited absolute prostate weight, prostate index, total acid phosphatase, prostatic acid phosphatase, WBC and the expression levels of thirty up-regulated genes, while BSO could significantly increased DLCC and...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

Enos Tangke, Arung , Shoko, Furuta , Hiroya, Ishikawa , Irawan Wijaya, Kusuma , Kuniyoshi, Shimizu , ...

In an effort to find a new whitening agent, we have found that the methanol extract of the dried skin of Allium cepa showed inhibition of melanin formation. Bioassay-guided fractionation led to the isolation of quercetin (1) and quercetin 4’-O-β-glucoside (3) from A. cepa as the inhibitors of melanin formation in B16 melanoma cells with IC50 values of 26.5 and 131 μM, respectively. In addition, we evaluated the effect of some quercetin derivatives, such as isoquercitrin (2), quercetin 3, 4’-O-diglucoside (4), rutin (5) and hyperin (6) on B16 melanoma cells. These quercetin derivatives did not show any inhibition of melanin...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

J.E., Pardo , M.A., Cuesta , A., Alvarruiz , J.D., Granell , M., Álvarez-Ortí

The potential and real qualities of virgin olive oils, from the Designation of Origin (DO) “Aceite Montes de Alcaraz”, were evaluated. The regulated physicochemical and sensory parameters, the stability parameters and the fatty acid, sterol and triterpenic dialcohol compositions were analyzed. The results of the regulated parameters in the potential quality study classified all the analyzed oils into the “extra virgin” category. The varieties Picual and Cornicabra showed remarkably high stability, due to their high total polyphenol content. The fatty acid contents fell within the intervals required by the EU regulations in all the analyzed samples. The distribution of fatty...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

Ghasem, Haghi , Alireza, Hatami , Rohollah, Arshi

The caffeic acid derivatives including neochlorogenic acid (3-COA), cryptochlorogenic acid (4-CQA), chlorogenic acid (5-CQA) and caffeic acid (CA) have been characterized in Gundelia tournefortii using reference compounds, chemical, spectral evidences and chromatographic data. In addition, the total phenolic content and chlorogenic acid were measured in the leaf, hull-less seed, and skin extracts of this herb by the Folin-Ciocalteu reagent and high performance liquid chromatography (HPLC), respectively. The sample analysis was carried out on a C18 column with 5% (v/v) aqueous acetic acid and methanol as the mobile phase, under gradient elution at ambient temperature, at 325 nm. The amount of...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

G., Luciano , V., Vasta , F.J., Monahan , P., López-Andrés , L., Biondi , ...

Fourteen lambs were individually penned for 60 days. Seven lambs (C) were fed a barley-based concentrate, while 7 animals (T) received the same concentrate supplemented with 8.96% (dry matter basis) quebracho (Schinopsis lorentzii) extract. Tannin supplementation extended colour stability of fresh longissimus dorsi muscle (LM) over 7 days of aerobic storage with lower changes in hue angle over time in LM from T-fed animals compared to C-fed lambs (P = 0.032). Muscle from T-fed lambs had lower metmyoglobin percentages (MMb%) than that from C-fed animals after 3 days of storage (P = 0.05) and tended to have slower rates of...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

S., Damjanovic Desic , I., Birlouez-Aragon

Infant formulas are highly sensitive to the Maillard reaction during manufacturing, while this reaction induces significant loss in protein nutritional value and safety. The indicators mostly used to monitor the reaction during heat treatment are furosine, carboxymethyllysine and hydroxymethylfurfural, but analysis of these molecules is time-consuming and expensive. The FAST method, based on simple fluorescence measurements on clear milk supernatant, is a good alternative for Maillard reaction monitoring in milk products.The aim of this study was to determine the respective sensitivity of the various indicators of heat damage to infant formula, including the FAST index. A realistic infant formula model...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 24 July 2010

B.A., Goodman , E.C., Pascual , C., Yeretzian

Because of the roles of free radicals in the formation of Maillard reaction products and as markers of oxidation processes in foods, the dynamics of free radical generation during the roasting of coffee beans have been measured, and some exploratory investigations conducted on the extent to which these are influenced by the bean type, and the atmosphere (air vs. N2), in which the beans were roasted and cooled.The intensities of the free radical signals from individual Arabica and Robusta coffee beans were measured continuously in an EPR spectrometer, whilst beans underwent heating/cooling cycles in air or N2 atmospheres. Additional EPR...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

J.A., Pérez-Serradilla , M.D., Luque de Castro

Most research on extraction of phenol compounds from wine by-products and commercial exploitation of extracts use grape seeds and/or skins as raw materials. Looking for alternative antioxidants sources, obtaining antioxidant extracts from wine lees (also known as dregs), a sub-exploited by-product of winemaking process, is here presented. Microwave-assisted extraction (MAE) of phenolic compounds from wine lees has been optimized using the total phenols index, the ORAC values and yield of the extraction as response variables. Under the optimal working conditions, the proposed MAE method provides better extraction efficiency in a much shorter time (17 min) than the conventional extraction method...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

Marijan, Šeruga , Ivana, Novak , Lidija, Jakobek

Red wines produced in three different wine growing regions of Croatia were analysed for total polyphenols (TP) content, concentration of individual polyphenols and antioxidant activity (AA). TP content was measured by differential pulse voltammetry (DPV), Folin-Ciocalteu (FC) and HPLC methods. Individual polyphenols were measured by HPLC and AA was determined by ABTS and DPPH methods. The results showed that DPV is a very sensitive method for the determination of TP. A very high correlation was obtained between the TP content determined by DPV, FC and HPLC. The major polyphenols in the wines were gallic acid and (+)-catechin. TP, individual polyphenols...

Publication year: 2010
Source: Food Chemistry, In Press, Corrected Proof, Available online 23 July 2010

Jaspreet, Singh , Charline, Lelane , Robert B., Stewart , Harjinder, Singh

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

A.R., Shalaby , Nadia A., Salama , S.H., Abu-Raiia , Wafaa H., Emam , F.M., Mehaya

High-performance liquid chromatographic method with diode-array detection (HPLC-DAD) was optimized and validated for determination of tetracyclines (TCs) residue in chicken meat and liver through evaluating each step of various methods. The principle steps involved ultrasonic-assisted extraction of TCs from chicken samples by 2ml of 20% trichloroacetic acid and citrate buffer (pH 4) which gave a clearer supernatant and high recovery, followed by centrifugation and purification on SPE (Strata C18-E cartridge) using 10ml of 0.01M methanolic oxalic acid for TCs elution. Separation was on reversed-phase column (Nuclosil 100 C18, 25cm x 4.6mm I.D., 5μm) by multisteps gradient elution which provided a...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

Jin Hwan, Lee , Myoung-Gun, Choung

The present study deals with determination of curcuminoids, which are potential sources of a natural food colourant, present in commercially available food items in Korean markets. Three principles, curcumin (1), demethoxycurcumin (2), and bisdemethoxycurcumin (3), were isolated from Curcuma longa roots. Moreover, their contents were investigated in fifty-four items of sixteen food types by HPLC-DAD at 420 nm. The recovery rates showed remarkable differences, and ham of solid state exhibited the highest rate (98.9%), while beverage of liquid state was the lowest (0.34%). Among food items, curcumin (1) detected the predominant content and curry showed the highest curcuminoid in the...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

N., Herwig , K., Stephan , U., Panne , W., Pritzkow , J., Vogl

In this study, an analytical procedure for multi-element screening of 40 elements in milk and feed samples was developed. Three different digestion and two different calibration methods were tested for the best suitability. The analytical procedure for the quantification of minor and trace elements is based on sector field ICP-MS (SF-ICP-MS). The method validation revealed good agreement between the determined elemental mass fractions and the certified values of two milk and three feed reference materials. Milk samples of dairy cows at different feeding regimes were collected from two different farms. The results of our study showed significant differences of nine...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

Juliana, Naozuka , Edivan, CarvalhoVieira , Angerson Nogueira, Nascimento , Pedro Vitoriano, Oliveira

A method for the multi-elemental determination of metals (Al, Ba, Ca, Cu, Fe, K, Mg, Mn, Sr and Zn), metalloids (B and Si), and non-metals (Cl, P and S) in the babassu nut and mesocarp, sapucaia nut, coconut pulp, cupuassu pulp and seed, and cashew nut by axially viewed inductively coupled plasma optical emission spectrometry is presented. A diluted oxidant mixture (2 ml HNO3 + 1 ml H2O2 + 3 ml H2O) was used to achieve the complete decomposition of the organic matrix in a closed-vessel microwave oven. The accuracy of the entire proposed method was confirmed by standard reference...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

Peihong, Deng , Junjie, Fei , Jun, Zhang , Yonglan, Feng

A reliable and sensitive procedure for the determination of trace levels of molybdenum by adsorptive anodic stripping voltammetry is proposed. The method is based on adsorptive accumulation of the molybdenum (Mo)-alizarin violet (AV) complex onto an acetylene black paste electrode (ABPE), followed by oxidation of the adsorbed species by voltammetric scan using a second-order derivative modulation. For valtammetric determination of molybdenum, the parameters influencing the peak current have been optimized. Under the selected conditions, the electrode demonstrated linear response over a wide range of Mo(VI) concentration (6.0×10-9 mol/L∼1.0×10-5 mol/L), the detection limit was 2.0×10-9 mol/L (S/N=3) for 120 s accumulation....

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

A., Liazid , R.F., Guerrero , E., Cantos , M., Palma , C.G., Barroso

A new method for the analysis of anthocyanins in grapes based on a systematic study of the extractability of eleven anthocyanins from grapes has been developed. Microwave assisted extraction was applied as a prior stage to the chromatographic determination of anthocyanins in the extracts. The stability of anthocyanins under the extraction conditions was checked using a standardized extract from grape skins. Temperatures from 50 °C up to 150 °C were evaluated. A fractional factorial experimental design was developed to analyse the influence on the extraction process of six different extraction variables: solvent (mixtures of methanol and water), stirring, extraction temperature,...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

Kamlesh, Shrivas , Devesh Kumar, Patel

A rapid, simple and sensitive cleanup procedure is demonstrated for the determination of selenium in vegetable and fruit samples by using ultrasound assisted- hollow fiber liquid microextraction (UA-HF-LPME) and graphite furnace atomic absorption spectrometry (GF-AAS). Method is based on the microextraction of selenium from sample solution into 3.5 μL of organic solvent containing an N-octyl acetamide (OAA) as extracting agent, which is placed inside the hollow fiber followed by ultrasound irradiation. The parameters that affect the extraction efficiency of selenium from sample solution were investigated. The best optimum conditions for the extraction of selenium were achieved for 15 min of...

Publication year: 2010
Source: Food Chemistry, In Press, Accepted Manuscript, Available online 23 July 2010

R.B., Voegborlo , A., Matsuyama , A.A., Adimado , H., Akagi

Concentrations of methylmercury (MeHg) residues were determined in different marine and freshwater fishes from Ghana. Samples were treated with ethanolic potassium hydroxide in water bath at 100o C for 1 h. After neutralizing with HCl and washing with hexane, MeHg was extracted with dithizone in toluene, cleaned up and determined by Gas Chromatography with Electron Capture Detection (GC-ECD). The method was sensitive with good precision, detection limit of 0.0005 μg g-1 (0.5μg kg-1) and provided good separation for organomercury compounds. The validity of the method was established using dogfish muscle certified reference material, DORM-2. The method was applied to different...