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Chemical contaminants

Sat, 12/01/2018 - 00:00
New multiresidue methods for identification and quantification of over 131 pesticides in wine and grapes have been developed. The analyses were based on gas chromatography with microelectron capture and nitrogen–phosphorus detection (GC-μECD/NPD). Two different extraction protocols (QuEChERS-citrate buffer and unbuffered methods) for wine samples were described. A full...
Fri, 11/23/2018 - 01:10
Available online 22 November 2018 Author(s): Yucheng Zou, Cheng Zhang, Xingrong Ju, Zhigao Wang, Ying Wu, Jian Yuan, Wenye Chen, Rong HeAbstractRice bran, a resource-rich and nutritionally valuable by-product of rice milling, was contaminated seriously by cadmium in many parts of the world. An efficient and economical method to reduce Cd from Cd-contaminated rice bran, citric acid treatment, was...
Thu, 11/22/2018 - 01:11
Publication date: Available online 20 November 2018 Food and Chemical ToxicologyAuthor(s): R.E. Adams, J.A. Brickel, V.S. BhatAbstractDietary supplements are regulated by the U.S. FDA as a subset of foods. Most botanical dietary ingredients do not have pesticide tolerances, resulting in the enforcement of zero tolerance or general maximum residue limits (GMRL), rather than utilizing science-...
Mon, 11/19/2018 - 17:00
Akihiko Arakawa, Yukako Kasai, Kazuto Yamazaki, Fukumatsu Iwahashi Quinone outside inhibitors (QoIs), which inhibit the mitochondrial respiratory system binding to the Qo site of Complex III in fungi, are widely used as pesticides with broad spectrum antifungal activity. However, excessive use of QoIs leads to pesticide resistance through mutation of amino acid residues in the Qo site. Recently...
Mon, 11/19/2018 - 01:08
Publication date: March 2019Source: LWT, Volume 101Author(s): Mi Li, Yuhao Fan, Zhigang Liu, Yunfei Xie, Yahui Guo, Yuliang Cheng, He Qian, Weirong YaoAbstractMelamine is commonly used to manufacture the coating of three-piece tin cans. It may migrate into food in the course of storage, threatening the health of consumers. This work aimed to trace the migration of melamine into food simulants (...
Thu, 11/15/2018 - 11:00
Methylmercury is a potent human neurotoxin which biomagnifies in aquatic food webs. Although anaerobic microorganisms containing the hgcA gene potentially mediate the formation of methylmercury in natural environments, the diversity of these mercury-methylating microbial communities remains largely unexplored. Previous studies have implicated sulfate-reducing bacteria as the main mercury...
Wed, 11/14/2018 - 01:10
Available online 12 November 2018 Author(s): Thanh Mai Ha, Shamim Shakur, Kim Hang Pham DoAbstractThe growing demand for safe and high quality food in Vietnam has been driven by not only the rise in living standard but also consumer worry about food safety. This paper analyses consumer concern about food safety and its determinants, taking into account spatial disparities. Using the mixed method...
Fri, 11/09/2018 - 01:09
Available online 7 November 2018 Author(s): Chong Wang, Yunting Xie, Huiyuan Wang, Yun Bai, Chen Dai, Chunbao Li, Xinglian Xu, Guanghong ZhouAbstractPolycyclic aromatic hydrocarbons (PAHs) are discovered in many common foods and showed potential risks to human health and green tea (GT) extracts have been reported to inhibit PAHs generation. In this study, the effects of 8 pure phenolic compounds...
Fri, 11/02/2018 - 17:00
Cheng Liu, Jiaoyuan Li, William Steele, Xiangming Fang Food safety is a global public health issue, which often arises from asymmetric information between consumers and suppliers. With the development of information technology in human life, building a food traceability information sharing platform is viewed as one of the best ways to overcome the trust crisis and resolve the problem of...
Thu, 11/01/2018 - 00:00
A novel, sensitive, and selective electrochemical sensor has been fabricated for the determination of 1-naphthyl methylcarbamate (carbaryl) as an important pesticide. Three-dimensional graphene (3DG) was synthesized by using thiourea as the crosslinking agent that simultaneously caused impregnation of sulfur and nitrogen functional groups onto the graphene. Graphene doped...
Thu, 11/01/2018 - 00:00
A structure of polyurethane micelle/Ag nanoparticle (Ag NP) cluster was fabricated as surface-enhanced Raman scattering (SERS) substrate for in situ extracting organic compounds on the surface of different matrixes, in which polyurethane micelles acted as the host material to capture target molecules and stabilize nanoparticle cluster. This method provided stable aqueous...
Thu, 11/01/2018 - 00:00
A sensitive, rapid, and efficient analytical method based on vortex-assisted liquid–liquid extraction combined with air-assisted liquid–liquid microextraction using high performance liquid chromatography-variable wavelength detection has been developed for the extraction and determination of bisphenol A and bisphenol B in canned doogh samples. In this method, the analytes are...
Thu, 11/01/2018 - 00:00
A simple, fast and ecological analytical method using a semi-automatic fat extractor and HPLC-FLD (fluorescence detection) for determination of polycyclic aromatic hydrocarbon markers i.e. benzo(a)anthracene (BaA), chrysene (Chr), benzo(a)pyrene (BaP) and benzo(b)fluoranthene (BbF) in cocoa butter has been validated. Validation’s procedure performed out in concordance with...
Thu, 11/01/2018 - 00:00
Abstract Wild yam (Dioscorea spp.) tubers, an indigenous food makes a significant contribution to the diets of tribal people of Koraput, India. However, there is dearth of documented information of their mineral bioavailability and heavy metal content. To know their quality and safety concerns about their use, minerals and heavy metal concentrations were evaluated in eight...
Sat, 10/27/2018 - 01:10
Available online 26 October 2018 Author(s): Leisa Douglas, Gillian MacKinnon, Gordon Cook, Harry Duncan, Adrian Briddon, Steven SeamarkAbstractThe contamination of food with pesticide residues is of significant concern to consumers and legislation has been implemented worldwide to ensure compliance with Maximum Residue Levels of chemicals in food. The occurrence of the potato sprout inhibitor,...
Fri, 10/26/2018 - 01:11
Publication date: February 2019Source: LWT, Volume 100Author(s): Marta Mesias, Cristina Delgado-Andrade, Francisca Holgado, Francisco J. MoralesAbstractSince the regulation on the acrylamide reduction in foods, the food business operators have implemented mitigation strategies for reduction of acrylamide content in French fries. Thirty food service establishments from ten of the most relevant...
Tue, 10/23/2018 - 00:00
Journal of Agricultural and Food ChemistryDOI: 10.1021/acs.jafc.8b04908
Mon, 10/22/2018 - 12:48
The histidine ATP-binding cassette (ABC) transporter of Salmonella enterica serovar Typhimurium is among the best-studied type I ABC import systems. The transporter consists of two transmembrane subunits, HisQ and HisM, and a homodimer of the nucleotide-binding subunit, HisP. Substrates are delivered by two periplasmic solute binding proteins, HisJ and LAO, with preferences for histidine and...
Mon, 10/22/2018 - 01:10
Publication date: Available online 20 October 2018Source: LWTAuthor(s): Yu Shen, Sijia Zhao, Xiaoduo Zhao, Hongyang Sun, Meili Shao, Honghua XuAbstractAcrylamide (AA), a toxin that primarily exists in fried food, causes neurotoxicity, genetic toxicity, genetic mutations, and DNA damage. The present study aimed to elucidate the mechanisms by which lactic acid bacteria (LAB) adsorb AA. LAB cells...
Sun, 10/21/2018 - 01:06
Available online 13 October 2018 Author(s): Yamine Bouzembrak, Hans J.P. MarvinAbstractThe presence and development of many food safety risks are driven by factors within and outside the food supply chain, such as climate, economy and human behaviour. The interactions between these factors and the supply chain are complex and a system or holistic approach is needed to reveal cause-effect...
Wed, 10/17/2018 - 11:00
Bacteria play an important role in the removal of polycyclic aromatic hydrocarbons (PAHs) from polluted environments. In marine environments, Cycloclasticus is one of the most prevalent PAH-degrading bacterial genera. However, little is known regarding the degradation mechanisms for multiple PAHs by Cycloclasticus. Cycloclasticus sp. strain P1 was isolated from deep-sea sediments and is known to...
Wed, 10/17/2018 - 11:00
Reductive dehalogenation mediated by organohalide-respiring bacteria plays a critical role in the global cycling of organohalides. Nonetheless, information on the dehalogenation enantioselectivity of organohalide-respiring bacteria remains limited. In this study, we report the enantioselective dechlorination of chiral polychlorinated biphenyls (PCBs) by Dehalococcoides mccartyi CG1. CG1...
Fri, 10/12/2018 - 01:12
Available online 10 October 2018 Author(s): Bruce C. Koppen, Patrick P.G. Mulder, Leonie de Boer, Martijn Riool, Jan W. Drijfhout, Sebastian A.J. ZaatABSTRACTAntibiotic resistance and biofilm formation are the major reasons for failure in treatment of bacterial infections. We therefore aimed to identify synergistic combinations of conventional antibiotics and novel Synthetic Antimicrobial and...
Thu, 10/11/2018 - 01:11
Publication date: Available online 9 October 2018 Food and Chemical ToxicologyAuthor(s): Fu-Mei Huang, Yu-Chao Chang, Shiuan-Shinn Lee, Yung-Chyuan Ho, Ming-Ling Yang, Hui-Wen Lin, Yu-Hsiang KuanAbstractBisphenol A (BPA) is primarily used in production of polycarbonate plastics and epoxy resins including plastic containers. BPA is an endocrine disruptor and supposes to induce asthma and cancer....
Thu, 10/11/2018 - 01:08
Available online 8 October 2018 Author(s): Kanlaya Prapainop, Wid Mekseriwattana, Weena Siangproh, Orawon Chailapakul, Kriangsak SongsriroteAbstractAn approach for the determination of benzoic acid (BA) and total paraben content using mercaptosuccinic acid capped CdTe quantum dots (MSA-CdTe QDs) as an optical probe is presented. The levels of these preservatives in the samples of liquid foodstuff...
Mon, 10/08/2018 - 01:12
Publication date: Available online 6 October 2018 Food and Chemical ToxicologyAuthor(s): Walkiria Levy, Karl-Werner Schramm, Florian Mertes, Bernhard Henkelmann, Martina Maywald, Peter Uciechowski, Alexander Loa, Johannes Haedrich, Ines Thiem, Henner Hollert, Roland Goerlich, Thorsten Bernsmann, Lothar RinkAbstractRecent European regulations have indicated the need for new bioanalytical screening...
Fri, 10/05/2018 - 01:12
Publication date: Available online 3 October 2018 Food and Chemical ToxicologyAuthor(s): Matthew Dietrich
Mon, 10/01/2018 - 00:00
The identification of transformation products (TPs) of pesticides in food is a crucial task difficult to tackle, due to the lack of standards. In this work, we present a novel methodology to synthesize five main TP standards of the insecticide chlorpyrifos (CPF) and to investigate their occurrence in selected fruits and spices. TPs were electrochemically (EC) synthesized...
Mon, 10/01/2018 - 00:00
In this work, g-C3N4 was successfully fabricated by direct pyrolysis of the melamine, and then without any modification, was used to prepare g-C3N4/graphite pencil electrode. The maximum current at this working electrode was depended significantly by the pH value; thus, the g-C3N4/tartrazine interaction is pH-dependent and the best pH was obtained in an acidic medium at pH 2....
Mon, 10/01/2018 - 00:00
In this study, a simple and high-throughput multiresidue pesticide analysis method based on the quick, easy, cheap, effective, rugged, safe (QuEChERS) extraction combined with gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS) and ultra-high performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS) is presented for the determination of...
Mon, 10/01/2018 - 00:00
Abstract β-propeller phytase-like sequences (BPP-like sequences) are widespread in the microbial world and have been found in the sequenced genomes of aquatic, soil, and plant bacteria. Exploring NCBI microbial genome database for putative genes encoding phytase, a BPP-like sequence from Sphingomonas wittichii RW-1 (Sequence ID: CP000699.1), known for its capacity of degrading...
Sun, 09/30/2018 - 01:12
Publication date: Available online 29 September 2018 Food and Chemical ToxicologyAuthor(s): Sébastien Cambier, Masatake Fujimura, Jean-Paul BourdineaudAbstractMethylmercury (MeHg) taken up through fish consumption can be transferred from the mother to the fetus during pregnancy. In the present study, pregnant rat mothers were contaminated with environmentally relevant doses of 36 and 76 ng MeHg/g...
Sun, 09/30/2018 - 01:11
Available online 28 September 2018 Author(s): Qixiao Zhai, Yue Guo, Xiaoshu Tang, Fengwei Tian, Jianxin Zhao, Hao Zhang, Wei ChenAbstractCadmium (Cd) contamination in rice has become a serious food safety concern in developing countries. Microbial fermentation has been demonstrated as a promising method for removing Cd from rice. The present study evaluated the effects of Lactobacillus plantarum...
Wed, 09/26/2018 - 17:00
Tania Pozzo, Shawn M. Higdon, Sivakumar Pattathil, Michael G. Hahn, Alan B. Bennett An indigenous maize landrace from the Sierra Mixe region of Oaxaca, Mexico exhibits extensive formation of aerial roots which exude large volumes of a polysaccharide-rich gel matrix or “mucilage” that harbors diazotrophic microbiota. We hypothesize that the mucilage associated microbial community carries out...
Wed, 09/26/2018 - 01:13
Publication date: Available online 24 September 2018Source: LWTAuthor(s): Maria Luisa Ruiz del Castillo, Mónica Rodríguez-Valenciano, Gema Flores, Gracia Patricia BlanchAbstractAlthough, the use of pesticides is necessary in agriculture to prevent crops destruction and to avoid the attack to leaves and stems of the plants, which cause quality defects of fruits and yield reduction, the control of...
Sun, 09/23/2018 - 01:12
Publication date: November 2018 Food and Chemical Toxicology, Volume 121Author(s): C. SiekeAbstractCumulative dietary risks for the German population owing to pesticide residues in foods were assessed using food monitoring and consumption data. Based on grouping principles for cumulative assessment groups (CAG) as defined by the European Food Safety Authority, probabilistic modelling gave...
Sat, 09/22/2018 - 01:11
Publication date: December 2018Source: LWT, Volume 98Author(s): Raquel Fernanda Milani, Esther Lima de Paiva, Leandro Iagê Peron, Marcelo Antonio Morgano, Solange CadoreAbstractA simple method for arsenic species As (III), As (V), monomethylarsonic acid (MMA) and dimethylarsonic acid (DMA) were investigated in 18 herbal tea leaves and their infusion by high performance liquid chromatography...
Thu, 09/20/2018 - 01:12
Publication date: Available online 18 September 2018 Food and Chemical ToxicologyAuthor(s): Bahareh Ghasemidehkordi, Ali Akbar Malekirad, Habibollah Nazem, Mohammad Fazilati, Hossein Salavati, Nabi Shariatifar, Mohammad Rezaei, Yadolah Fakhri, Amin Mousavi Khaneghah
Tue, 09/18/2018 - 03:00
Journal of Food Protection, Volume 81, Issue 10, Page 1696-1706, October 2018.
Sun, 09/16/2018 - 01:11
Publication date: November 2018 Food and Chemical Toxicology, Volume 121Author(s): Paula Moyano, José Manuel García, Margarita Lobo, María José Anadón, Emma Sola, Adela Pelayo, Jimena García, María Teresa Frejo, Javier del PinoAbstractCadmium, a neurotoxic environmental compound, produces cognitive disorders, although the mechanism remains unknown. Cadmium induces a more pronounced cell death on...
Sat, 09/15/2018 - 01:11
Publication date: November 2018 Food and Chemical Toxicology, Volume 121Author(s): Marta Oliveira, Filipa Gomes, Álvaro Torrinha, Maria João Ramalhosa, Cristina Delerue-Matos, Simone MoraisAbstractPolycyclic aromatic hydrocarbons (PAHs) are persistent pollutants that have been raising global concern due to their carcinogenic and mutagenic properties. A total of 18 PAHs (16 USEPA priority...

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