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Chemical contaminants

Sun, 10/01/2017 - 00:00
A simple, sensitive, and selective analytical method was validated for the determination of mercury, cadmium, lead, arsenic, copper, iron, and zinc in fish muscle using microwave-induced plasma optical emission spectrometry (MIP OES) after acid digestion. The procedure for determining linear range, detection and quantification limits, selectivity, trueness, repeatability,...
Tue, 09/19/2017 - 12:06
Heavy metals from urban runoff preserved in sedimentary deposits record long-term economic and industrial development via the expansion and contraction of a city’s infrastructure. Lead concentrations and isotopic compositions measured in the sediments of the harbor of Ostia—Rome’s first harbor—show that lead pipes used in the water supply networks of...
Tue, 09/19/2017 - 11:40
This study evaluated and compared the levels of selected heavy metals in three fish species from two water bodies in Osun State. The fish species were carefully harvested, processed, and prepared for heavy metals (Nickel, Cadmium, Lead, and Arsenic) determinations using atomic absorption spectrophotometer. Results obtained showed that all the heavy metals investigated were present in all the...
Mon, 09/18/2017 - 17:00
Rance Nault, Kelly A. Fader, Jack R. Harkema, Tim Zacharewski The aryl hydrocarbon receptor (AhR) is a highly conserved transcription factor that mediates a broad spectrum of species-, strain-, sex-, age-, tissue-, and cell-specific responses elicited structurally diverse ligands including 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Dose-dependent effects on liver-specific and sexually dimorphic...
Fri, 09/15/2017 - 09:00
Publication date: Available online 14 September 2017 Food and Chemical Toxicology Author(s): Elzbieta Zieminska, Anna Ruszczynska, Jerzy W. Lazarewicz The brominated flame retardant tetrabromobisphenol A (TBBPA) has recognized neurotoxic properties mediated by intracellular Ca2+ imbalance and oxidative stress. Although these factors are known to trigger the release of Zn2+ from...
Tue, 09/12/2017 - 17:00
Yongkun Chen, Junkai Zhi, Hao Zhang, Jian Li, Qihong Zhao, Jichen Xu Phytolacca americana L. (pokeweed) has metal phytoremediation potential, but little is known about its metal accumulation-related genes. In this study, the de novo sequencing of total RNA produced 53.15 million reads covering 10.63 gigabases of transcriptome raw data in cadmium (Cd)-treated and untreated pokeweed. Of the 97,502...
Wed, 09/06/2017 - 22:51
Publication date: Available online 6 September 2017 Food and Chemical Toxicology Author(s): Maky Ideta-Otsuka, Katsuhide Igarashi, Minoru Narita, Yoko Hirabayashi As of 2017, chemical substances registered in Chemical Abstracts Service (CAS) exceed 100 million, which is increasing yearly. The safety of chemical substances is adequately managed by regulations based on scientific...
Wed, 09/06/2017 - 12:45
Abstract Different lactic acid bacteria (LAB) from spontaneous wheat sourdough were isolated, identified, and characterized by their growth, acidification rate, and carbohydrate metabolism. The combinations of isolated LAB (Pediococcus pentosaceus LUHS183 and Leuconostoc mesenteroides LUHS242, P. pentosaceus LUHS183 and Lactobacillus brevis LUHS173, P. pentosaceus LUHS183 and Enterococcus...
Tue, 09/05/2017 - 22:50
Publication date: Available online 5 September 2017 Food and Chemical Toxicology Author(s): Panchamee Dharmadasa, Nick Kim, Michelle Thunders Cadmium (Cd) exposure is not easily avoidable; it is a common contaminant found in many food sources, accumulates throughout life and, in high doses, is a significant health hazard for humans. Women are highly vulnerable to Cd because of their...
Tue, 09/05/2017 - 07:54
Publication date: January 2018 Source:LWT - Food Science and Technology, Volume 87 Author(s): Snežana Škaljac, Marija Jokanović, Vladimir Tomović, Maja Ivić, Tatjana Tasić, Predrag Ikonić, Branislav Šojić, Natalija Džinić, Ljiljana Petrović The aim of this study was to determine colour characteristics (lightness - L*, redness - a* and yellowness - b*) of dry fermented...
Tue, 09/05/2017 - 04:58
Publication date: Available online 5 September 2017 Author(s): Ajay Ghosh Chalasani, Utpal Roy, Sushma Nema A strong anti-methicillin resistant Staphylococcus aureus (MRSA) peptide (ASP-1) from the Bacillus subtilis URID 12.1 strain that is active against cefoxitin- and methicillin-resistant clinical isolates was purified to homogeneity by solvent extraction, silica gel-based...
Sun, 09/03/2017 - 23:50
Abstract The current study is aimed to evaluate the mechanism of anthracene degradation by a bacterial strain isolated from fly ash deposition site near Jamadoba Coal Preparation Plant, Jharkhand, India. The Bushnell-Haas media cultured (containing anthracene as sole carbon source) bacterial isolate was identified by 16S rRNA gene sequence coding as the Bacillus thuringiensis strain, which showed...
Fri, 09/01/2017 - 03:35
Abstract Microbial expression of genes for resistance to heavy metals and metalloids is usually transcriptionally regulated by the toxic ions themselves. Arsenic is a ubiquitous, naturally occurring toxic metalloid widely distributed in soil and groundwater. Microbes biotransform both arsenate (As(V)) and arsenite (As(III)) into more toxic methylated metabolites methylarsenite (MAs(III)) and...
Fri, 09/01/2017 - 00:00
Abstract The aim of this work was to provide a thorough evaluation of quality characteristics of French fries prepared from frozen potatoes using different home-cooking systems. French fries were prepared using deep-fat fryer, air-frying appliances, convection oven, and microwave oven. Two commercial frozen potato sticks, specifically intended for deep-fat frying and for oven...
Thu, 08/31/2017 - 11:04
The plant cell wall polysaccharide arabinan provides an important supply of arabinose, and unraveling arabinan-degrading strategies by microbes is important for understanding its use as a source of energy. Here, we explored the arabinan-degrading enzymes in the thermophilic bacterium Caldanaerobius polysaccharolyticus and identified a gene cluster encoding two glycoside hydrolase (GH) family 51...
Thu, 08/31/2017 - 00:00
Abstract This study investigated the acrylamide (AA) and heterocyclic aromatic amines (HAAs) exposure, according to age groups, estimated using a food frequency questionnaire study in combination with analytical data on AA and HAAs levels of chicken drumsticks (CDs), chicken wings (CWs), chicken burgers (CBs), and chicken nuggets (CNs), collected from fast food restaurants. The...
Thu, 08/24/2017 - 17:00
Laura M. Beaver, Lisa Truong, Carrie L. Barton, Tyler T. Chase, Greg D. Gonnerman, Carmen P. Wong, Robert L. Tanguay, Emily Ho Zinc deficiency and chronic low level exposures to inorganic arsenic in drinking water are both significant public health concerns that affect millions of people including pregnant women. These two conditions can co-exist in the human population but little is known about...
Fri, 08/18/2017 - 17:00
Eiki Kimura, Ken-ichiro Kubo, Toshihiro Endo, Wenting Ling, Kazunori Nakajima, Masaki Kakeyama, Chiharu Tohyama The basic helix-loop-helix (bHLH) transcription factors exert multiple functions in mammalian cerebral cortex development. The aryl hydrocarbon receptor (AhR), a member of the bHLH-Per-Arnt-Sim subfamily, is a ligand-activated transcription factor reported to regulate nervous system...
Thu, 08/17/2017 - 17:00
Publication date: October 2017 Food and Chemical Toxicology, Volume 108, Part A Author(s): Joseph H.Y. Galani, Nilesh J. Patel, Jayant G. Talati For directing scientists, consumers, industry and stakeholders on mitigation strategies, there is a need to understand the acrylamide-forming potential of important Indian foods. Flour obtained from total 16 varieties of 9 Indian cereals,...
Thu, 08/17/2017 - 17:00
Publication date: October 2017 Food and Chemical Toxicology, Volume 108, Part A Author(s): Francesco Esposito, Antonio Nardone, Evelina Fasano, Maria Triassi, Teresa Cirillo Potato crisps, corn-based extruded snacks and other savoury snacks are very popular products especially among younger generations. These products could be a potential source of acrylamide (AA), a toxic compound...
Mon, 08/14/2017 - 00:00
Abstract Consumers like fried snacks, and taste, color, and texture are key aspects in their preference. However, during frying of foods some toxic compounds, such as furan and acrylamide, are produced. The objective of this work was to mitigate furan and acrylamide formation in potato chips, without affecting their main quality attributes, by using vacuum frying. To accomplish...
Fri, 08/11/2017 - 01:05
Publication date: December 2017 Source:LWT - Food Science and Technology, Volume 86 Author(s): Nail Altunay, Özge Demir, Ramazan Gürkan A simple, rapid and economical ultrasound-assisted microextraction (UA-ME) procedure was developed for extraction and determination of trace amounts of melamine in milk products, followed at 310 nm by UV-Visible spectrophotometry. In the study, 1-hexyl-...
Sun, 08/06/2017 - 00:00
Toxins, Vol. 9, Pages 242: Enter the Dragon: The Dynamic and Multifunctional Evolution of Anguimorpha Lizard Venoms Toxins doi: 10.3390/toxins9080242 Authors: Ivan Koludarov Timothy NW Jackson Bianca op den Brouw James Dobson Daniel Dashevsky Kevin Arbuckle Christofer J. Clemente Edward J. Stockdale Chip Cochran Jordan Debono Carson Stephens Nadya Panagides Bin Li...
Wed, 08/02/2017 - 14:15
Journal of Agricultural and Food ChemistryDOI: 10.1021/acs.jafc.7b02504
Tue, 08/01/2017 - 00:00
A nanoporous carbon prepared from metal−organic frameworks through high temperature treatment has been examined for the extraction of some endocrine disrupting chemicals (bisphenol A, 4-tert-octylphenol, nonylphenol, and 4-nonylphenol) from bottled juice samples. To obtain an optimum extraction performance, the main experimental parameters for the extraction including the...
Tue, 08/01/2017 - 00:00
Analytical method for the determination of four flame retardants (FRs) from two groups was proposed. These groups included the brominated flame retardants (BFRs) 3,3′,5,5′-tetrabromobisphenol A (TBBPA) and 1,2,5,6,9,10-hexabromocyclododecane (HBCD); triester organophosphate flame retardants (OPFRs), ethylhexyl diphenyl phosphate (EHDP) and triphenyl phosphate (TPhP). Reversed...
Tue, 08/01/2017 - 00:00
A vortex-assisted dispersive solid-phase microextraction (VA-d-μ-SPE) method for separation and preconcentration of polycyclic aromatic hydrocarbons (PAHs) using ionic liquid-modified metal–organic frameworks (IL-MIL-100(Fe)), prior to the measurement by gas chromatographic system equipped with a flame ionization detector (GC–FID) has been developed. The IL-MIL-100(Fe)...
Fri, 07/28/2017 - 00:00
Abstract Furan, a potential carcinogenic compound, can be formed in array of processed foods. The objective of this study was to conduct kinetic studies in pineapple juice and assess the interactive effects of pressure (0.1 to 600 MPa) and temperature (30 to 120 °C) on furan formation. Additional experiments were carried out in tomato, watermelon, cantaloupe, kale, and carrot...
Thu, 07/27/2017 - 17:28
Publication date: Available online 27 July 2017 Author(s): Gulcin Kultur, N.N. Misra, Francisco J. Barba, Mohamed Koubaa, Hami Alpas The inactivation of pathogenic and spoilage bacteria as well as the formation of food processing contaminants (e.g. acrylamide, furan, etc.) in infant foods is of utmost importance for industry, consumers as well as regulatory bodies. In this study,...
Fri, 07/21/2017 - 17:00
Dan Wang, Weizhong Chen, Shanqing Huang, Yafeng He, Xichun Liu, Qingyuan Hu, Tianbiao Wei, Hong Shang, Jianhua Gan, Hao Chen Pseudomonas aeruginosa (P. aeruginosa) is a major opportunistic human pathogen, causing serious nosocomial infections among immunocompromised patients multi-determinant virulence and high antibiotic resistance. The CzcR-CzcS signal transduction system in P. aeruginosa is...
Wed, 07/19/2017 - 00:55
Journal of Agricultural and Food ChemistryDOI: 10.1021/acs.jafc.7b01946
Tue, 07/18/2017 - 00:00
Abstract Due to their increasing use in agriculture, the presence of pesticide residues in food and water currently represents one of the major issues for the food safety. Among the pesticides, organophosphate and carbamate species are the most used, and their toxicity is mainly due to their inhibitory effect on acetylcholinesterase (AChE). For this reason, a monoenzymatic...
Mon, 07/17/2017 - 13:52
Publication date: August 2017 , Volume 100, Issue 8 Author(s): Xiaoping Wu, Bernt Guldbrandtsen, Ulrik Sander Nielsen, Mogens Sandø Lund, Goutam Sahana Identification of the genetic variants associated with calf survival in dairy cattle will aid in the elimination of harmful mutations from the cattle population and the reduction of calf and young stock mortality rates. We used de-...
Sat, 07/15/2017 - 22:52
Publication date: November 2017 , Volume 133 Author(s): Andrea Servili, Erica Feliziani, Gianfranco Romanazzi After harvest, table grapes can easily undergo fungal spoilage, which is mainly caused by Botrytis cinerea, the causal agent of gray mold. To reduce such losses, table grapes are usually treated with conventional fungicides during the season, and cold stored in the presence of...
Fri, 07/14/2017 - 10:35
Abstract AimsThe aim of the study was to explore irrigation water polluted with industrial waste and corresponding cropland to screen bacteria for As-detoxification and plant growth promotion. Methods and ResultsPlant growth promoting As-resistant cropland bacteria were isolated from contaminated irrigation water and corresponding agricultural soil. Phylogenetic analysis revealed that the...
Fri, 07/14/2017 - 08:01
Publication date: December 2017 , Volume 82 Author(s): Eniko Covaci, Marin Senila, Michaela Ponta, Eugen Darvasi, Maria Frentiu, Tiberiu Frentiu A non-chromatographic method was developed for Hg speciation as CH3Hg+ and Hg2+ using simple instrumentation based on optical emission spectrometry in a low power and low Ar consumption capacitively coupled plasma microtorch and detection...
Thu, 07/13/2017 - 10:44
Journal of Agricultural and Food ChemistryDOI: 10.1021/acs.jafc.7b01164
Tue, 07/11/2017 - 00:00
Melamine is a nitrogen-rich compound (about 66%) whose fraudulent addition to foods aims to increase the apparent protein content. In 2008, melamine adulteration incidents occurred in China caused several deaths in humans from kidney failure and other health problems. This issue prompted private as well as governmental laboratories to develop several analytical methods in order...

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