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Chemical contaminants

Fri, 06/12/2015 - 01:33
10.1080/19440049.2015.1051137Judith Jenny-Burri
Fri, 06/12/2015 - 01:33
Levels of cadmiumCd), arsenic (As), mercury (Hg), lead (Pb), iron (Fe), and zinc (Zn) were investigated in 285 samples of 9 species of edible fungi (Lentinus edodes, Auricularia auricula, Pleurotus ostreatus, Tremella fuciformis, Flammulina velutipes, Agrocybe chaxinggu, Armillaria mellea, Agaricus bisporus, and Pholiota nameko), which were collected from markets in Beijing, China. In addition,...
Tue, 06/09/2015 - 01:28
Resistance to methicillin and other β-lactam antibiotics in staphylococci is due to mecA, which is carried on a genomic island, SCCmec. The chromosomal excision and integration of SCCmec is mediated by the site-specific recombinases CcrAB or CcrC encoded within this element. A plasmid-borne system was constructed to assess the activities of CcrA and CcrB in the excision and integration of...
Mon, 06/08/2015 - 03:20
Publication date: July 2015 Trends in Food Science & Technology, Volume 44, Issue 1 Author(s): Kevin M. Cooper , Connor McMahon , Ian Fairweather , Christopher T. Elliott Residues of veterinary medicines are a food safety issue regulated by European legislation. The occurrence of animal diseases necessitating application of veterinary medicines is significantly affected by global...
Fri, 06/05/2015 - 01:24
We investigated the response of the hydrocarbon-degrading Mycobacterium vanbaalenii PYR-1 to crude oil from the BP Deepwater Horizon (DWH) spill, using substrate depletion, genomic, and proteome analyses. M. vanbaalenii PYR-1 cultures were incubated with BP DWH crude oil, and proteomes and degradation of alkanes and polycyclic aromatic hydrocarbons (PAHs) were analyzed at four time points over 30...
Fri, 06/05/2015 - 01:24
Diverse methodologies are available for quantification of acrylamide (AA), a recent known food-borne toxin. However, these methodologies involve complex, lengthy, and expensive procedures. In this work, a simple method based on a recently developed AA derivatization technique using xanthydrol, avoiding any time-consuming cleanup step, was optimized in order to be applied to...
Fri, 06/05/2015 - 01:24
A convenient analytical method for quantitative characterization of 46 pesticides in fresh peppermint (a plant with high chlorophyll content) has been developed. The plant samples were extracted with acetonitrile and then with graphitized carbon black (GCB), and primary–secondary amine (PSA) was added to dispersive solid phase extraction tubes in order to reduce chlorophyll...
Thu, 06/04/2015 - 06:20
Publication date: October 2015 Source:LWT - Food Science and Technology, Volume 63, Issue 2 Author(s): Minmin Li , Yanan Liu , Bei Fan , Jia Lu , Yan He , Zhiqiang Kong , Yulong Zhu , Qiu Jian , Fengzhong Wang Food safety, especially with respect to pesticide-contaminated products, has received considerable attention in recent years. In this study, the effects of food processing...
Tue, 06/02/2015 - 01:29
Publication date: 1 January 2016 , Volume 190 Author(s): Juan Ignacio Cacho , Natalia Campillo , Pilar Viñas , Manuel Hernández-Córdoba The concentration of twelve polycyclic aromatic hydrocarbons (PAHs), included in the list of priority pollutants, in different spirits has been obtained by means of a rapid and sensitive method based on gas chromatography and mass spectrometry (GC–MS)....
Sun, 05/31/2015 - 01:23
Environmental contamination by polycyclic aromatic hydrocarbons (PAHs) typically occurs as mixtures of compounds. In this study, the response of indigenous soil bacterial and fungal communities to mixtures containing phenanthrene, fluoranthene and benzo(a)pyrene in various combinations was examined using molecular fingerprinting techniques and quantification of a key PAH degradative gene. Results...
Thu, 05/28/2015 - 06:20
Publication date: August 2015 Food and Chemical Toxicology, Volume 82 Author(s): Stephen B. Stanfill , André Luiz Oliveira da Silva , Joseph G. Lisko , Tameka S. Lawler , Peter Kuklenyik , Robert E. Tyx , Elizabeth H. Peuchen , Patricia Richter , Clifford H. Watson Rapé, a diverse group of smokeless tobacco products indigenous to South America, is generally used as a nasal snuff and...
Mon, 05/25/2015 - 01:17
Publication date: 1 January 2016 , Volume 190 Author(s): Guoxin Lai , Guoying Chen , Tuanwei Chen A sensitive method was developed to speciate and quantify AsIII and AsV in fruit juices. At pH 3.0, AsIII and ammonium pyrrolidine dithiocarbamate (APDC) formed a complex, which was extracted into CCl 4 by dispersive liquid–liquid microextraction (DLLME) and subsequently quantified by hydride...
Sun, 05/24/2015 - 03:20
Publication date: September 2015 , Volume 75 Author(s): Diogo Thimoteo da Cunha , Anna Rafaela Cavalcante Braga , Estevão de Camargo Passos , Elke Stedefeldt , Veridiana Vera de Rosso A positive outlook regarding future events, in which individuals find themselves less likely than others to experience negative events, is called optimistic bias (OB). The aims of this study were: 1. To...
Sat, 05/23/2015 - 06:20
Publication date: Available online 8 May 2015 Author(s): Qiong Zhang , Thao Nguyen , Megan McMichael , Sandanandan Velu , Jing Zou , Xuedong Zhou , Hui Wu Streptococcus mutans is a major aetiological agent of dental caries. Formation of biofilms is a key virulence factor of S. mutans . Drugs that inhibit S. mutans biofilms may have therapeutic potential. Dihydrofolate reductase (DHFR...
Sat, 05/23/2015 - 01:21
Publication date: 1 January 2016 , Volume 190 Author(s): Ahmad Sarreshtehdar Emrani , Noor Mohammad Danesh , Parirokh Lavaee , Mohammad Ramezani , Khalil Abnous , Seyed Mohammad Taghdisi Antibiotic residues in animal foodstuffs are of great concern to consumers. In this study, fluorescence quenching and colorimetric aptasensors were designed for detection of streptomycin based on...
Sat, 05/23/2015 - 01:21
Publication date: 1 January 2016 , Volume 190 Author(s): Tomasz Tuzimski , Tomasz Rejczak In this study, the solid-phase extraction/quick, easy, cheap, effective, rugged and safe (SPE/QuEChERS) technique was adapted to develop a simple sample treatment for multi-residue pesticide analysis of edible oils. The proposed method is based on liquid–liquid partitioning with acetonitrile followed...
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...

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