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Chemical contaminants

Fri, 05/22/2015 - 01:19
Publication date: 1 January 2016 , Volume 190 Author(s): Luiz Alberto Bandeira de Oliveira , Henrique Poltronieri Pacheco , Rodrigo Scherer The aim of this work was to monitor flutriafol and pyraclostrobin residues in Brazilian green coffees. More than 10,000 samples were analyzed. The pesticides were extracted using the QuEChERS method and analyzed by LC–MS/MS. The validated method is...
Thu, 05/21/2015 - 20:00
Abstract The use of better carbon sources and efficient production strains were deemed as promising strategies to economize tannase production. A novel agro-residue, cashew testa, was tested for the production of tannase under solid-state fermentation (SSF) using Aspergillus niger CEPC 11. CEPC 11 was identified by 18S rDNA typing as Aspergillus niger and deposited in...
Tue, 05/19/2015 - 12:32
Publication date: March 2013 Source:LWT - Food Science and Technology, Volume 50, Issue 2 Author(s): Silvia A.V. Tfouni , Camila S. Serrate , Fernanda M. Leme , Monica C.R. Camargo , Camila R.A. Teles , Kátia M.V.A.B. Cipolli , Regina P.Z. Furlani During coffee’s roasting process undesirable compounds such as polycyclic aromatic hydrocarbons (PAHs) may be formed and later transferred...
Tue, 05/19/2015 - 12:32
Publication date: January 2013 Source:LWT - Food Science and Technology, Volume 50, Issue 1 Author(s): Maria Rosecler Miranda Rossetto , Tânia Mizuzo Shiga , Fabio Vianello , Giuseppina Pace Pereira Lima The limited availability of foods that are free of pesticides has led Brazil to search for alternative production methods to meet the desires of consumers. Currently, organic cultivation...
Sat, 05/16/2015 - 01:26
Publication date: 1 December 2015 , Volume 188 Author(s): Mickael C. Santos , Cláudia Nunes , M. Angélica M. Rocha , Ana Rodrigues , Sílvia M. Rocha , Jorge A. Saraiva , Manuel A. Coimbra The impact of high hydrostatic pressure (HHP) treatments on volatile composition of sulphur dioxide-free wines during bottle storage was studied. For this purpose, white and red wines were produced...
Sat, 05/16/2015 - 01:26
Publication date: August 2015 Food and Chemical Toxicology, Volume 82 Author(s): Jong-Hang Chen , Chin-Cheng Chou This study explores human neuroblastoma (SH-SY5Y) and human glioblastoma (U-1240 MG) cellular differentiation changes under exposure to acrylamide (ACR). Differentiation of SH-SY5Y and U-1240 MG cells were induced by retinoic acid (RA) and butyric acid (BA), respectively....
Thu, 05/14/2015 - 03:20
A rapid analytical method for the simultaneous determination of 62 pesticides in edible fungi was established based on modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) sample preparation method with gas chromatography–triple mass spectrometry (GC–MS/MS). Before extracting the target compounds from edible fungi, the dry samples were soaked in distilled water...
Sat, 05/09/2015 - 01:25
Yun Wang, Hong Chen, NingLing Wang, HaiYan Guo, Yonglun Fu, Songguo Xue, Ai Ai, Qifeng Lyu, Yanping Kuang The goal of this study is to elucidate the effects of 17β-estradiol and TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin) on macrophage phenotypes in the endometriotic milieu. Co-culture of endometrial stromal cells (ESCs) and U937 cells (macrophage cell line) was performed to simulate the...
Fri, 05/08/2015 - 01:17
Publication date: Available online 7 May 2015 Author(s): F. Navarro , S. Harouna , M. Calvo , M.D. Pérez , L. Sánchez Lactoferrin is a protein with important biological functions that can be obtained from milk and by-products derived from the dairy industry, such as whey. Although bovine lactoferrin has been extensively studied, ovine lactoferrin is not quite as well known. In the...
Wed, 05/06/2015 - 01:16
Quinones and other oxygenated polycyclic aromatic hydrocarbons (oxy-PAHs) are toxic and/or genotoxic compounds observed to be cocontaminants at PAH-contaminated sites, but their formation and fate in contaminated environmental systems have not been well studied. Anthracene-9,10-dione (anthraquinone) has been found in most PAH-contaminated soils and sediments that have been analyzed for oxy-PAHs....
Mon, 05/04/2015 - 01:22
Publication date: May 2015 , Volume 98, Issue 5 Author(s): Buket Er Demirhan , Burak Demirhan , H.Eda Satana Kara A simple, sensitive, and precise room-temperature phosphorescence method was developed for the determination of melamine in dairy products using l -cysteine-capped Mn-doped zinc sulfide (ZnS) quantum dots as a probe. This method is based on the quenching of the phosphorescence...
Thu, 04/30/2015 - 01:16
Publication date: September 2015 , Volume 107 Author(s): A. Watanabe , G. Kamada , M. Imanari , N. Shiba , M. Yonai , T. Muramoto Volatiles in the headspace of beef cooked at 180 °C were analyzed using solid-phase microextraction (SPME) and gas chromatography–mass spectrometry (GC–MS), and the effects of aging were evaluated. Seventy volatile substances including non-aromatic,...
Wed, 04/29/2015 - 01:22
We integrated immunological separation and surface-enhanced Raman spectroscopySERS) to detect melamine in milk. Antimelamine was produced by New Zealand white rabbits following the injection with melamine hapten-ovalbumin immunogen. Melamine was separated from milk by binding to the converted protein G-antimelamine complex. After releasing antimelamine and melamine from the complex, the eluents...
Wed, 04/29/2015 - 01:22
Neelja Singhal, Abhishikha Srivastava, Manish Kumar, Jugsharan Singh Virdi Yersiniosis caused by Yersinia enterocolitica has been reported from all continents. The bacterial species is divided into more than fifty serovars and six biovars viz. 1A, 1B, 2, 3, 4 and 5 which differ in geographical distribution, ecological niches and pathogenicity. Most Y.enterocolitica strains harbor chromosomal...
Tue, 04/28/2015 - 01:19
Furana possible carcinogen, is commonly produced by thermal processing in a number of heated foods. The existence of furan levels in foods has attracted considerable attention worldwide. Recent research of furan in food has focused on the possible influences of operating parameters on the furan formation during heat processing. The aim of our study was to investigate the impacts of multiple...
Sat, 04/25/2015 - 01:20
Publication date: 15 November 2015 , Volume 187 Author(s): Juan Xu , Lili Ma , Dong Jiang , Shiping Zhu , Fuhua Yan , Yunxia Xie , Zongzhou Xie , Wenwu Guo , Xiuxin Deng Due to the furanocoumarin compounds in the fruit, the production and consumption of grapefruit have been affected in the past decades since the ‘grapefruit juice effect’ was declared. To provide elite germplasm and...
Sat, 04/25/2015 - 01:20
Publication date: 15 November 2015 , Volume 187 Author(s): Mohammad Behbahani , Parmoon Ghareh Hassanlou , Mostafa M. Amini , Fariborz Omidi , Ali Esrafili , Mehdi Farzadkia , Akbar Bagheri In this research, a new sample treatment technique termed solvent-assisted dispersive solid phase extraction (SA-DSPE) was developed. The new method was based on the dispersion of the sorbent into...
Sat, 04/25/2015 - 01:20
Danielle Naville, Emmanuel Labaronne, Nathalie Vega, Claudie Pinteur, Emmanuelle Canet-Soulas, Hubert Vidal, Brigitte Le Magueresse-Battistoni Pollutants are suspected to contribute to the etiology of obesity and related metabolic disorders. Apart from occupational exposure which concerns a subset of chemicals, humans are mostly exposed to a large variety of chemicals, all life-long and at low...
Thu, 04/16/2015 - 01:19
Publication date: Available online 15 April 2015 Food and Chemical Toxicology Author(s): Davi Felipe Farias , Martônio Ponte Viana , Gustavo Ramos Oliveira , Vanessa Olinto Santos , Clidia Eduarda Moreira Pinto , Daniel Araújo Viana , Ilka Maria Vasconcelos , Maria Fátima Grossi-de-Sa , Ana Fontenele Urano Carvalho Cry8Ka5 is a mutant protein from Bacillus thruringiensis ( Bt ) that...
Wed, 04/15/2015 - 03:20
Publication date: Available online 13 April 2015 Food and Chemical Toxicology Author(s): Marta Mesías , Francisco J. Morales This research updates the acrylamide content of commercial potato crisps marketed in Spain with the aim to evaluate its trend since 2004. Two different batches of 40 potato crisps brands from 18 producers were analysed. Acrylamide content ranged from 108 to 2180 µg/kg...
Tue, 04/14/2015 - 01:18
This paper investigated the effect of air-frying technologyin combination with a pretreatment based of soaking the samples in different chemical agent solutions (citric acid, glycine, calcium lactate, sodium chloride, or nicotinic acid [vitamin B3]), on the generation of acrylamide in fried potatoes. The influence of reducing sugars on the development of surface's color was also analyzed. The...
Mon, 04/13/2015 - 01:22
Publication date: 15 October 2015 , Volume 185 Author(s): Hui Huang , Yongxin Li , Jintong Liu , Jin Tong , Xingguang Su Bisphenol A (BPA) is a kind of carcinogen, which can interfere with the body’s endocrine system. In this paper, a new kind of fluorescent sensor for BPA detection was established based on the fluorescent conjugated polymer PPESO 3 . The oxidative product of BPA is able...
Mon, 04/13/2015 - 01:22
Publication date: 15 October 2015 , Volume 185 Author(s): Sara Costa , Cláudia Afonso , Carlos Cardoso , Irineu Batista , Nádia Chaveiro , Maria Leonor Nunes , Narcisa Maria Bandarra The effect of culinary treatments on the fatty acid profile, mercury (Hg), and methylmercury (MeHg) levels of salmon was studied. The bioaccessibility of fatty acids, Hg, and MeHg in raw and grilled salmon...
Sun, 04/12/2015 - 01:19
Publication date: October 2015 , Volume 56 Author(s): Panneerselvam Rajapandiyan , Wei-Li Tang , Jyisy Yang To determine the artificial additives in dairy products, we demonstrate a simple method for rapid and massive determination of melamine in milk liquid and powder samples by surface-enhanced Raman spectroscopy (SERS) technique. The developed method utilizes silver nanoparticles (AgNPs...
Sun, 04/12/2015 - 01:19
Publication date: October 2015 , Volume 56 Author(s): Qinqin Hu , Xiahong Xu , Yingchun Fu , Yanbin Li Acrylamide (AA), a neurotoxin and potential carcinogen, has been found in various thermally processed foods such as potato chips, biscuits, and coffee. LC–MS/MS and GC–MS as standard detection methods show high sensitivity, selectivity, stability, and repeatability. However, these...
Sat, 04/11/2015 - 01:26
Methylmercury is a potent neurotoxin that is produced by anaerobic microorganisms from inorganic mercury by a recently discovered pathway. A two-gene cluster, consisting of hgcA and hgcB, encodes two of the proteins essential for this activity. hgcA encodes a corrinoid protein with a strictly conserved cysteine proposed to be the ligand for cobalt in the corrinoid cofactor, whereas hgcB encodes a...
Fri, 04/10/2015 - 01:21
A method was developed to determine melamine in milk powder and liquid milk by capillary zone electrophoresis after electrokinetic supercharging. The effects of buffer acidity and concentration, the type and length of leader and terminator electrolytes, injection time and matrix effects were investigated. The optimum background electrolyte was 50 mM sodium citrate-citric acid...
Fri, 04/10/2015 - 01:21
In this study, chitosan-grafted multiwalled carbon nanotubes were synthesized and characterized using Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, and static and kinetic adsorption experiments. The results showed that the resulting material had good adsorption abilities and rapid dynamic properties...
Fri, 04/10/2015 - 01:21
This paper describes, a new, sensitive, and low-cost solid-phase extraction method using poly (N-phenylethanolamine)/multiwalled carbon nanotube (MWCNT) nanocomposite for extraction, preconcentration, and flame atomic absorption spectrometric determination of lead in food and water samples at trace levels. The poly (N-phenylethanolamine)/MWCNT nanocomposites were...
Fri, 04/10/2015 - 01:21
The fast measurement of pesticide residues on fruits peels is crucial, for it is harmful for both human health and environment. In this study, we used apples and chlorpyrifos as the research materials and analyzed the volatiles from apples via its infrared spectra. As the low concentration of the volatiles, multi-reflecting mirrors were used to enhance the sensitivity of the...
Thu, 04/09/2015 - 01:28
Publication date: Available online 8 April 2015 Food and Chemical Toxicology Author(s): Luísa Camacho , Mallikarjuna S. Basavarajappa , Ching-Wei Chang , Tao Han , Tetyana Kobets , Igor Koturbash , Gordon Surratt , Sherry M. Lewis , Michelle M. Vanlandingham , James C. Fuscoe , Gonçalo Gamboa da Costa , Igor P. Pogribny , K. Barry Delclos Bisphenol A (BPA), an industrial chemical...
Thu, 04/09/2015 - 01:28
Publication date: Available online 8 April 2015 Author(s): Fabio Macedo , Eliane Teixeira Marsico , Carlos Adam Conte-Júnior , Leonardo de Almeida Furtado , Taila Figueredo Brasil , Annibal Duarte Pereira Netto Macrocyclic lactones (ML) are commonly used in drug formulations for the treatment of parasites in cattle. In Brazil, except for drugs (or formulations) with long-term (half-...
Thu, 04/09/2015 - 01:28
Publication date: Available online 8 April 2015 Food and Chemical Toxicology Author(s): Yi He , Klaus von Lampe , Laura Wood , Marin Kurti Information of toxic elements such as lead (Pb) and cadmium (Cd) in counterfeit cigarettes offers insight on the potential public health impact of consuming counterfeit cigarettes and the technology used by counterfeiters in the illicit cigarette trade...
Wed, 04/08/2015 - 03:20
The present research project was intended to assess the antibiotics residues in poultry meat and to explore the impacts of different cooking methods on antibiotic residues in broiler meatThree dose levels (10, 20 and 40 mg/kg body weight) of antibiotics were administered to the broilers. The antibiotics were administered for 5 consecutive days at the age of 25 days. The birds were slaughtered...
Wed, 04/08/2015 - 03:20
A method combining protein extraction with hydride generation-atomic fluorescence spectrometer was developed to analyze protein-based arsenic (PBA) present in popular shrimp of China. The traditional method of alkali extraction-isoelectric precipitation was used for protein extraction, and microwave was applied for sample digestion. It was found that PBA concentrations in the...
Wed, 04/08/2015 - 01:23
Ching-Yu Lin, Feng-Peng Huang, Yee Soon Ling, Hao-Jan Liang, Sheng-Han Lee, Mei-Yun Hu, Po-Nien Tsao Naphthalene, the most common polycyclic aromatic hydrocarbon, causes airway epithelium injury in mice. Repeated exposure of mice to naphthalene induces airway epithelia that are resistant to further injury. Previous studies revealed that alterations in bioactivation enzymes and increased levels...
Fri, 01/30/2015 - 01:18
Natalia M. Grindler, Jenifer E. Allsworth, George A. Macones, Kurunthachalam Kannan, Kimberly A. Roehl, Amber R. Cooper Objective Endocrine-disrupting chemicals (EDCs) adversely affect human health. Our objective was to determine the association of EDC exposure with earlier age of menopause. Methods Cross-sectional survey using National Health and Nutrition Examination Survey (NHANES) data from...
Fri, 01/30/2015 - 01:18
Publication date: 1 July 2015 , Volume 178 Author(s): Nina Bilandžić , Đurđica Božić , Božica Solomun Kolanović , Ivana Varenina , Luka Cvetnić , Željko Cvetnić The distribution of sulfamonomethoxine (SMM) and trimethoprim (TMP) in egg yolk and white was measured during and after administration of a SMM/TMP combination in laying hens in doses of 8 g l− 1 and 12 g l− 1 in drinking water...
Fri, 01/30/2015 - 01:18
Publication date: Available online 21 January 2015 Food and Chemical Toxicology Author(s): Fouzia Amamou , Saïd Nemmiche , Radjaa kaouthar Meziane , Amal Didi , Sidi Mouhamed Yazit , Daoudi Chabane-Sari Cadmium (Cd) is one of the most common heavy metal pollutants. It is accumulated particularly in liver and kidney. The present study examined the possible protective effect of olive oil...
Fri, 01/30/2015 - 01:18
Publication date: July 2015 , Volume 53 Author(s): Joice Sifuentes Dos Santos , Thiago Guilherme Schwanz , Andreia Niederauer Coelho , Marla Cristina Heck-Marques , Marisa Marroni Mexia , Tatiana Emanuelli , Ijoni Costabeber The estimated daily intake (EDI) of organochlorine (OC) pesticides (HCB, α-HCH, lindane, aldrin, p,p′-DDE, p,p′-DDD, and o,p′-DDT) through consumption of dairy...
Fri, 01/30/2015 - 00:08
Publication date: May 2015 , Volume 103 Author(s): Marzieh Kamankesh , Abdorreza Mohammadi , Hedayat Hosseini , Zohreh Modarres Tehrani A simple and rapid analytical tech nique for the simultaneous determination of 16 polycyclic aromatic hydrocarbons (PAHs) in grilled meat was developed using microwave-assisted extraction and dispersive liquid–liquid microextraction (MAE–DLLME) followed...
Fri, 01/30/2015 - 00:08
The alteration of the profile of volatiles of canned coconut milk was monitored during storage at ambient temperatureCanned coconut milk was thermally processed (121 °C for 5 min), and then stored at ambient temperature (32 to 35 °C) for 6 mo. Volatile compounds were assessed monthly using direct solvent extraction (diethyl ether), followed by high-vacuum distillation and gas chromatography-mass...
Fri, 01/30/2015 - 00:08
There is an increasing interest in recent years in using novel nanomaterials as cost-effectivesensitive, and reproducible substrate for surface-enhanced Raman spectroscopy (SERS) applications. In this study, a novel SERS substrate was developed by assembling gold nanorods into standing arrays on a gold-coated silicon slide. The standing nanorod arrays were closely packed on the gold film,...
Wed, 01/21/2015 - 01:16
Aims Organophosphorus pesticides are widely used in agriculture. Accordingly decontamination of these pesticides and their residual in environment is an important aim of researchers. One of the best approaches is enzymatic detoxification of these compounds with organophosphorus hydrolase (OPH). The immobilization of OPH on environmentally friendly supports is of great importance for developing...

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