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Chemical contaminants

Fri, 12/01/2017 - 00:00
A voltammetric method for fast and high sensitive determination of Bisphenol A (BPA) using glassy carbon electrode (GC) modified with carbon black nanoparticles (CB) was developed. Cyclic voltammetry study in the 0.1 M phosphates of pH = 7.0 gave single anodic peak at 578 mV. Adsorption-controlled oxidation of BPA was found to be irreversible with the participation of two...
Fri, 12/01/2017 - 00:00
An acryloyl β-cyclodextrin (A-β-CD) monolithic column for solid-phase microextraction (SPME) and determination of carbofuran and carbaryl by high-performance liquid chromatography (HPLC) have been prepared through a “one-step” polymerization method. The synthesis conditions, including the volume of cross-linker, the ratio and volume of mixed porogenic solvent consisted of...
Fri, 12/01/2017 - 00:00
Modified QuEChERS method combined with gas chromatography tandem mass spectrometry (GC-MS/MS) was developed and validated to determine pesticide residues in dried cocoa beans. Extraction efficiency of matrix hydration effect on 19 pesticide residues was studied and optimized using 23 full factorial design with percentage recoveries as the response variable. The optimized...
Fri, 12/01/2017 - 00:00
In this study, a core–shell magnetic dummy molecularly imprinted polymer (MDMIP) was prepared with a novel and simple method. The imprinting layer was synthesized directly on the surface of Fe3O4 by only one step, which avoided further modification on the exterior of magnetic core. 4,4′-Dihydroxybiphenyl (DDBP) was used as dummy template instead of bisphenol A (BPA) to...
Thu, 11/16/2017 - 21:57
Publication date: April 2018 , Volume 86 Author(s): Anna Bauer, Jens Luetjohann, Sascha Rohn, Jürgen Kuballa, Eckard Jantzen A new sensitive, fast, and robust analytical method based on a QuPPe (Quick Polar Pesticides) extraction procedure coupled to ion chromatography-tandem mass spectrometry (IC-MS/MS) was developed. The study aimed at the determination of the highly polar...
Thu, 11/16/2017 - 21:57
Publication date: April 2018 , Volume 86 Author(s): Kumela Dibaba, Lelise Tilahun, Neela Satheesh, Melkayo Geremu Keribo is one of the most commonly used traditional beverages in both rural and urban areas of Ethiopia. However, the occurrence of some harmful compounds which could potentially be formed due to its processing methods has never been investigated. The aim of this study...
Thu, 11/16/2017 - 21:57
Publication date: April 2018 , Volume 86 Author(s): Heyao Yu, Jack A. Neal, Sujata A. Sirsat There has been an increasing number of foodborne illness outbreaks associated with fresh and fresh-cut produce recently; however, few studies have examined consumers' risk perceptions and their willingness to pay (WTP) for fresh-cut produce with lower foodborne illness risk (FBIR). Hence, the...
Tue, 11/14/2017 - 17:00
Aristos Ioannou, Constantinos Varotsis High performance liquid chromatography (HPLC) coupled with a Fraction Collector was employed to isolate Maillard reaction products (MRPs) formed in model systems comprising of asparagine and monosaccharides in the 60–180°C range. The primary MRP which is detected at 60°C is important for Acrylamide content and color/aroma development in foods and also in...
Mon, 11/13/2017 - 23:15
Abstract BACKGROUNDThe study determined the heavy metal contamination (mercury, cadmium, lead, arsenic and nickel) of nori, restaurant-served sushi and ready-to-eat sushi meals available through retail chains. Moreover the microbiological loads and biogenic amines content in ready-to-eat sushi meals were analysed. RESULTSAll the nori samples contained high levels of Cd (2.122 mg kg-1), Ni (0.715...
Thu, 11/09/2017 - 22:56
Publication date: January 2018 Food and Chemical Toxicology, Volume 111 Author(s): Yolanda Picó, Mohamed A. El-Sheikh, Ahmed H. Alfarhan, Damià Barceló The occurrence of pesticide residues in fruits was determined by a target method for 62 analytes and a wide scope screening method against a database of 500 pesticides. Limits of quantification (LOQs) were from 0.5 to 6.3 μg kg−1 for...
Thu, 11/09/2017 - 22:56
Publication date: Available online 8 November 2017 Food and Chemical Toxicology Author(s): Seoyoung Kim, Gilim Mun, Eun Choi, Minjeong Kim, Ji Seong Jeong, Keon Wook Kang, Sunha Jee, Kyung-Min Lim, Yun-Sil Lee An association between bisphenol A (BPA) exposure and hepatic tumors was suggested, but the employment of high-dose levels raises questions about its relevance to...
Wed, 11/08/2017 - 00:00
Abstract Under conditions of Azolla imbricata restoration, the high-throughput sequencing technology was employed to determine change trends of microbial community structures in the soil that had undergone long-term application of pesticides. The relationship between the content of pesticide residues in the soil and the microbial community structure was analyzed. The results...
Mon, 11/06/2017 - 17:00
Chelsea M. Rochman, J. Mark Parnis, Mark A. Browne, Sebastian Serrato, Eric J. Reiner, Matthew Robson, Thomas Young, Miriam L. Diamond, Swee J. Teh We examined whether environmentally relevant concentrations of different types of microplastics, with or without PCBs, directly affect freshwater prey and indirectly affect their predators. Asian clams (Corbicula fluminea) were exposed to...
Mon, 11/06/2017 - 12:13
Publication date: 15 April 2018 , Volume 245 Author(s): Vincent Vaccher, Philippe Marchand, Mélanie Picherot, Gaud Dervilly-Pinel, Elodie Lesquin, Aline Brosseaud, Anaïs Venisseau, Bruno Le Bizec During a national monitoring plan, a pork fat sample was declared non-compliant for the sum of dioxins and PCB-DL (EU regulation). The National Reference Laboratory together with...
Mon, 11/06/2017 - 08:19
Publication date: December 2017 Food and Chemical Toxicology, Volume 110 Author(s): Jessica Tressou, Nadia Ben Abdallah, Christelle Planche, Gaud Dervilly-Pinel, Pierre Sans, Erwan Engel, Isabelle Albert In this paper, exposure to Polychlorinated biphenyls (PCBs) related to bovine meat consumption is assessed based on multiples sources of data, namely data collected within the...
Mon, 11/06/2017 - 08:19
Publication date: December 2017 Food and Chemical Toxicology, Volume 110 Author(s): M. Zbucka-Kretowska, I. Poplawska, A. Kretowska, M. Moniuszko, K. Grubczak Bisphenol A (BPA) is a phenolic compound being constituent of numerous everyday-used products. Additionally, good absorption through skin and gastrointestinal tract is an unquestionable evidence for high risk of BPA exposure...
Mon, 11/06/2017 - 08:19
Publication date: December 2017 Food and Chemical Toxicology, Volume 110 Author(s): Sébastien Gorecki, Nawel Bemrah, Alain-Claude Roudot, Eric Marchioni, Bruno Le Bizec, Franck Faivre, Manik Kadawathagedara, Jérémie Botton, Gilles Rivière Bisphenol A (BPA) is used in a wide variety of products and objects for consumers use (digital media such as CD's and DVD's, sport...
Mon, 11/06/2017 - 00:00
A high-performance thin-layer chromatographic (HPTLC) method was developed and validated according to the protocol on Validation of Analytical Procedures: methodology, Veterinary International Cooperation on Harmonization for simultaneous determination of enrofloxacin and ciprofloxacin in broiler chicken tissues viz. liver, kidney, muscle-breast, muscle-thigh, and skin....
Thu, 11/02/2017 - 09:26
AbstractIn this study, the levels of furan in coffee with consideration towards common coffee consumption was investigated. The concentration of furan in brewed coffee was the highest among the coffee types studied, with an average of 110.73 ng/mL, followed by canned coffee (28.08 ng/mL) and instant coffee (8.55 ng/mL). In instant and brewed coffee, the furan levels decreased by up to an average...
Tue, 10/31/2017 - 11:00
Complete utilization of carbohydrate fractions is one of the prerequisites for obtaining economically favorable lignocellulosic biomass conversion. This study shows that xylan in untreated rice straw was saccharified to xylose in one step without chemical pretreatment, yielding 58.2% of the theoretically maximum value by Paenibacillus curdlanolyticus B-6 PcAxy43A, a weak lignin-binding...
Sun, 10/29/2017 - 23:55
Summary Acrylamide in foods is declared as carcinogen. In the present work, the effect of enzymatic pretreatment and other parameters like enzyme concentration, frying conditions with respect to temperature and time, size of potato chips, and effect of sodium chloride and citric acid on mitigation of acrylamide were studied. The concentration of acrylamide in fried potatoes after the pretreatment...
Thu, 10/26/2017 - 11:00
Abstract Enzyme inhibition-based detection is the most widely used method for rapid detection of organophosphorus pesticides (OPs) in food and agricultural products. However, the accuracy of the method were negatively affected by low inhibitory activities of OPs with P=S moiety on acetylcholinesterase. Herein, we demonstrated that oxidation pretreatments with bromine, hydrogen peroxide, or...
Wed, 10/25/2017 - 17:00
Kevin C. Elliott, Aaron M. McCright, Summer Allen, Thomas Dietz Scientists who perform environmental research on policy-relevant topics face challenges when communicating about how values may have influenced their research. This study examines how citizens view scientists who publicly acknowledge values. Specifically, we investigate whether it matters: if citizens share or oppose a scientist’s...
Wed, 10/25/2017 - 08:00
Journal of Agricultural and Food ChemistryDOI: 10.1021/acs.jafc.7b03118
Mon, 10/23/2017 - 12:22
Publication date: 15 April 2018 , Volume 245 Author(s): Jing Duan, Zheng Cheng, Jiawei Bi, Yangguang Xu The presence of organochlorine pesticides (OCPs) in dairy products can lead to human exposure. This study investigated the behavior of OCP residues in milk during yogurt and cheese production. Gas chromatography with electron-capture detection (GC-ECD) was used to detect α-...
Mon, 10/23/2017 - 12:22
Publication date: 15 April 2018 , Volume 245 Author(s): Ester López-García, Nicola Mastroianni, Cristina Postigo, Yolanda Valcárcel, Silvia González-Alonso, Damia Barceló, Miren López de Alda This work presents a fast, sensitive and reliable multi-residue methodology based on fat and protein precipitation and liquid chromatography-tandem mass spectrometry for the determination...
Sun, 10/22/2017 - 08:00
Publication date: March 2018 Source:LWT - Food Science and Technology, Volume 89 Author(s): Anil Kumar Meghavarnam, Savitha Janakiraman Acrylamide, a potential carcinogen is formed when starchy foods are fried or baked above 120 °C. l-asparaginase is an enzyme that catalyzes the hydrolytic cleavage of the amino acid l-asparagine, the precursor for acrylamide, to l-aspartic acid and...
Sat, 10/21/2017 - 12:12
Publication date: 15 April 2018 , Volume 245 Author(s): G. Daniali, S. Jinap, M. Sanny, C.P. Tan This work investigated the underlying formation of acrylamide from amino acids in frying oils during high temperatures and at different times via modeling systems. Eighteen amino acids were used in order to determine which one was more effective on acrylamide production. Significantly the...
Sat, 10/21/2017 - 12:12
Publication date: 15 April 2018 , Volume 245 Author(s): Jaime Alcántara-Durán, David Moreno-González, Bienvenida Gilbert-López, Antonio Molina-Díaz, Juan F. García-Reyes In this work, a sensitive method based on nanoflow liquid chromatography high-resolution mass spectrometry has been developed for the multiresidue determination of veterinary drugs residues in honey, veal muscle,...
Fri, 10/20/2017 - 03:00
Journal of Food Protection, Volume 80, Issue 11, Page 1924-1932, November 2017.
Fri, 10/20/2017 - 03:00
Journal of Food Protection, Volume 80, Issue 11, Page 1924-1932, November 2017.
Tue, 10/17/2017 - 11:57
Publication date: 1 April 2018 , Volume 244 Author(s): Yao Huang, Fang Feng, Zhi-Gang Chen, Tao Wu, Zi-Han Wang Natural deep eutectic solvents (NADESs) constitute a novel class of biodegradable and inexpensive solvents. In this study, twenty choline chloride- and glycerol-based NADESs were prepared and investigated as washing agents in the removal of cadmium (Cd) from rice flour for...
Tue, 10/17/2017 - 11:57
Publication date: 1 April 2018 , Volume 244 Author(s): Anna Bauer, Jens Luetjohann, Franziska S. Hanschen, Monika Schreiner, Jürgen Kuballa, Eckard Jantzen, Sascha Rohn A new mass spectrometric method for evaluating metabolite formation of the pesticides thiacloprid, azoxystrobin, and difenoconazole was developed for the Brassica species pak choi and broccoli. Both, distribution...
Tue, 10/17/2017 - 11:00
In the foodborne pathogen Listeria monocytogenes, arsenic resistance is encountered primarily in serotype 4b clones considered to have enhanced virulence and is associated with an arsenic resistance gene cluster within a 35-kb chromosomal region, Listeria genomic island 2 (LGI2). LGI2 was first identified in strain Scott A and includes genes putatively involved in arsenic and cadmium resistance,...
Tue, 10/17/2017 - 03:00
Journal of Food Protection, Volume 80, Issue 11, Page 1890-1896, November 2017.
Tue, 10/17/2017 - 03:00
Journal of Food Protection, Volume 80, Issue 11, Page 1890-1896, November 2017.
Mon, 10/16/2017 - 17:00
Halina B. Röllin, Bukola Olutola, Kalavati Channa, Jon Ø. Odland Background Prenatal exposure to lead (Pb) has been shown to have negative and irreversible health impacts on foetal and early childhood development, affecting morbidity and mortality in adulthood. This study aimed to assess in utero Pb exposure, examine birth outcomes, and identify confounding factors in the large cohort of South...
Sat, 10/14/2017 - 11:42
Publication date: 15 March 2018 , Volume 243 Author(s): Carla S.P. Santos, Lucía Molina-Garcia, Sara C. Cunha, Susana Casal Fresh potatoes were intermittently deep-fried up to recommended limits (175°C, 8h/day, 28h) in extra-virgin olive oil (EVOO), peanut oil (PO) and canola oil (CO), and compared for diverse chemical components and sensorial attributes, aiming to quantify the impact...
Sat, 10/14/2017 - 11:42
Publication date: 15 March 2018 , Volume 243 Author(s): Wen-Chieh Sung, Yu-Wei Chang, Yu-Hao Chou, Hsin-I Hsiao This research aims to clarify the interactions that occur in a food model system consisting of glucose, asparagine and chitosans. Low molecular weight chitosan exerted a potent inhibitory effect (46.8%) on acrylamide and Maillard reaction products (MRPs) (>52.6%),...
Sat, 10/14/2017 - 02:55
AbstractMetallothionein (MT) plays a major role in the detoxification of toxic metal ions in mussel. This study served to investigate the effects of prepared protein hydrolysate–Fe2+ (PH–Fe2+) on depuration of cadmium salt (Cd2+) from blue mussel (Mytilus edulis). The results indicated that Cd2+ concentrations in control ranged from 46.1 to 47.1 μg/g during 15 d of depuration. While, 40 mg/L PH–...
Fri, 10/13/2017 - 00:00
Toxins, Vol. 9, Pages 323: Combined Venom Gland Transcriptomic and Venom Peptidomic Analysis of the Predatory Ant Odontomachus monticola Toxins doi: 10.3390/toxins9100323 Authors: Kohei Kazuma Keiichi Masuko Katsuhiro Konno Hidetoshi Inagaki Ants (hymenoptera: Formicidae) have adapted to many different environments and have become some of the most prolific and successful insects. To...
Fri, 10/06/2017 - 08:50
Abstract BACKGROUNDVariability of pesticide residues among food items is very important when assessing the risks and food safety for the consumers. Therefore, the present study was undertaken to estimate the unit-to-unit residue variability factors for eggplant. RESULTSIn total 120 samples from a trial field and 142 samples from different marketplaces in Thessaloniki, Greece were collected to...
Thu, 10/05/2017 - 20:08
Publication date: March 2018 , Volume 85 Author(s): Jak-anan Malarut, Kanithaporn Vangnai Our study investigated the effect of smoking sausages using different types of woodchips—Neem (Azadirachta indica Valeton.), Copper pod (Cassia siamea Lamk), Earleaf acacia (Acacia auriculiformis Cunn.), and Eucalyptus (Eucalyptus camaldulensis Dehn)—compared to commercial Beech woodchips on...

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