Chemical contaminants

Sun, 04/04/2021 - 06:08
Author(s): Firouzeh Hassani Moghadam, Mohammad A. Taher, Hassan Karimi-Maleh A sensitive and fast approach has been introduced for the voltammetric sensing of bisphenol A based on modification of a paste electrode with Pt-SWCNTs and 1-ethyl-3-methylimidazolium n-butylsulfate as a highly conductive binder. The new sensor was used to determine the concentration of bisphenol A in food products in I-...
Sun, 04/04/2021 - 02:02
Tobacco readily accumulates cadmium (Cd), an unnecessary and poisonous element. A total of 107 soil and tobacco leaf samples were collected from South China, to clarify the quantitative relationship between soil properties and Cd content in tobacco leaves. The results showed that 86.9% of the total sampling points had soil cadmium in excess of standard value, and the ratio of active Cd content to...
Sun, 04/04/2021 - 02:02
One hundred and twenty samples of breast milk were collected from five northern governorates and districts in Jordan in 2019 and 2020 to monitor results for organochlorine pesticides as organic contaminants. The results showed that 36 samples (30%) of total 120 analyzed samples were contaminated as follows: 16 samples (13.3%) were contaminated with dieldrin, 4 samples (3.3%) with p,p′-DDE, 4...
Sat, 04/03/2021 - 06:18
Author(s): Vahideh Mahdavi, Arnavaz Keikavousi Behbahan, Gholamreza Golmohammadi, Behrouz Tajdar, Zahra Eslami, Amin Mousavi Khaneghah Saffron is a strategic agricultural product having extensive flavoring applications in Asia. Although utilization of pesticides for its cultivation is limited, there is a possible risk of contamination in this prominent spice. Herein, 88 pesticides were analyzed...
Sat, 04/03/2021 - 02:02
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous pollutants having health hazards. PAH-utilizing bacterial strains were isolated from petroleum-contaminated soil from siding area, Bijwasan supply location of BPCL, Delhi, India. Bacterial strains with different morphology were isolated and acclimatized to a mixture of low molecular weight PAH compounds in the concentration range of 50–10,000...
Fri, 04/02/2021 - 06:09
Author(s): Philipp Eyring, Marc Tienstra, Hans Mol, Susan Strange Herrmann, Peter Have Rasmussen, Henrik Lauritz Frandsen, Mette Erecius Poulsen Various generic extraction methods have been used to determine pesticide residues, mycotoxins, and polycyclic aromatic hydrocarbons (PAHs) in food and animal feed to ensure consumer safety. However, these methods cannot extract all relevant compounds at...
Thu, 04/01/2021 - 06:18
Author(s): R. Paranthaman, J.A. Moses, C. Anandharamakrishnan This study aimed to develop and validate a powder X-ray diffraction method for the direct detection of PbCrO4 adulteration in turmeric powder. Different X-ray tube voltage (25–45 kV), tube current (25–45 mA), and scanning parameters (step size, 2θ° and time per step, s) were used and optimized on the angle of 15°–50° at 25°C with CuKα...
Thu, 04/01/2021 - 06:15
Author(s): Xiaoting Hu, Tao Li, Weihong Xu, Yourong Chai Cadmium (Cd) tolerance mechanisms in plant are mainly divided into two categories: evasion mechanism and tolerance mechanism. However, due to the complexity of the mechanism of Cd absorption and accumulation in crops, there are still disputes and controversies about Cd toxicity to plants and the mechanism of Cd tolerance in plants. The Cd...
Thu, 04/01/2021 - 04:03
An increasing number of studies have suggested that PAH contamination in dairy products demands high concern. This study established an efficient determination method for the European Union 15 + 1 PAHs and four PAH derivatives in dairy samples using a QuEChERS method coupled with GC-QqQ-MS. The optimized method obtained a recovery of 63.38–109.17% with a precision of 3.82–15.62%, and the limit of...
Wed, 03/31/2021 - 16:00
The concurrence of structurally complex petroleum-associated contaminants at relatively high concentrations, with diverse climatic conditions and textural soil characteristics, hinders conventional bioremediation processes. Recalcitrant compounds such as high molecular weight polycyclic aromatic hydrocarbons (HMW-PAHs) and heavy alkanes commonly remain after standard soil bioremediation at...
Wed, 03/31/2021 - 04:03
The carbon–silicon switch strategy has become a key technique for structural optimization of drugs to widen the chemical space, increase drug activity against targeted proteins, and generate novel and patentable lead compounds. Flubeneteram, targeting succinate dehydrogenase (SDH), is a promising fungicide candidate recently developed in China. We describe the synthesis of novel SDH inhibitors...
Tue, 03/30/2021 - 22:07
Journal of Applied Toxicology, EarlyView. Polycyclic aromatic hydrocarbons (PAHs) are the most common contaminants in the air pollutants. Inhalation exposure to PAHs could increase the risk of respiratory disease, cardiovascular disease and even cancer. However, the biotoxicity of multi‐component PAHs from atmospheric pollutants has been poorly studies. The main topic of this study was to...
Mon, 03/29/2021 - 22:09
Journal of Food Processing and Preservation, Accepted Article. In this study, the optimized conditions for L‐asparaginase treatment on Arabica coffee beans and the impacts of two independent variables (enzyme dosage and treatment time) on five dependent variables (acrylamide, 2‐Acetyl‐3‐Methylpyrazine, 2,3‐Dimethylpyrazine, 2,5‐Dimethylpyrazine and 2‐Methylpyrazine) were investigated by employing...
Mon, 03/29/2021 - 16:00
Dental caries is a chronic oral infectious disease caused by cariogenic biofilm adhered on the tooth surface. Our previous study demonstrated that a repurposed natural compound napabucasin (NAP) showed good antimicrobial activity against oral streptococcal biofilms. The current study designed a novel small molecule, namely LCG-N25, using NAP as a lead compound, and aimed to investigate its...
Sun, 03/28/2021 - 06:10
Author(s): Ogouyôm Herbert Iko Afé, Claude Saegerman, Yénoukounmè Euloge Kpoclou, Caroline Douny, Ahmed Igout, Jacques Mahillon, Victor Bienvenu Anihouvi, Djidjoho Joseph Hounhouigan, Marie-Louise Scippo The present study aims to assess the contamination of smoked and smoked-dried fish sampled on Beninese market with biogenic amines and polycyclic aromatic hydrocarbons (PAHs). Fifteen PAHs, ten...
Sun, 03/28/2021 - 06:09
Author(s): Tereza Slámová, Adéla Fraňková, Jan Banout Aim of this work was to in detail investigate the practices of traditionally smoke-cured fish from the Tonle Sap area, Cambodia and monitoring of the concentrations of selected polycyclic aromatic hydrocarbons (PAHs). The levels of benzo(a)pyrene (BaP), sum of 4 PAHs (ƩPAH4) and total PAHs (ƩPAH12) in 57 samples of smoked fish commonly...
Sun, 03/28/2021 - 06:09
Author(s): Leonardo Francisco Rafael Lemes, César Ricardo Teixeira Tarley This study describes the development of a new analytical method for cadmium determination in flaxseed flour based on ultrasound-assisted extraction combined with supramolecular preconcentration followed by thermospray flame furnace atomic absorption spectrometry. Cadmium from flaxseed flour was extracted by ultrasound-...
Sun, 03/28/2021 - 06:09
Author(s): Zhuang Hong, Wang Minghua, Nan Bo, Yang Chaoyue, Yan Haiyang, Ye Haiqing, Xi Chunyu, Zhang Yan, Yuan Yuan Acrylamide (AA) is a common endogenous contaminant in food, with a complex toxicity mechanism. The study on liver damage to experimental animals caused by AA has aroused a great attention. Rosmarinic acid (RosA) as a natural antioxidant shows excellent protective effects against AA...
Sun, 03/28/2021 - 06:08
Author(s): Guangzhe Yang, Shan Fu, Jingjing Huang, Longying Li, Yan Long, Qiuxing Wei, Zhigang Wang, Zhiwei Chen, Jixing Xia Cadmium (Cd) is a highly toxic element to living organisms, and its accumulation in the edible portions of crops poses a potential threat for human health. The molecular mechanisms underlying Cd detoxification and accumulation are not fully understood in plants. In this...
Sun, 03/28/2021 - 06:08
Author(s): Jing Ge, Li-Li Liu, Zheng-Guo Cui, Milton Talukder, Mei-Wei Lv, Jin-Yang Li, Jin-Long Li Cadmium (Cd) is a ubiquitous environmental pollutant, which mainly input to the aquatic environment through discharge of industrial and agricultural waste, can be a threat to human and animal health. Selenium (Se) possesses a beneficial role in protecting animals and ameliorating the toxic effects...
Sat, 03/27/2021 - 22:09
Journal of Separation Science, Accepted Article. Pesticides and veterinary drugs are generally employed to control pests and insects in crop and livestock farming. However, remaining residues are considered potentially hazardous to human health and the environment. Therefore, regular monitoring is required for assessing and legislation of pesticides and veterinary drugs. Various approaches to...
Sat, 03/27/2021 - 04:02
Bisphenol A (BPA) is a well-recognized endocrine disruptor, and considering its adverse effects its use in infant bottles has been banned in many countries. Growing concern on the use of BPA has led to its replacement with its analogues in numerous applications. Present is the first report determining the occurrence of seven bisphenols (BPs: BPA, BPAF, BPC, BPE, BPFL, BPS, and BPZ) in Indian...
Sat, 03/27/2021 - 04:02
The increase in fat-related diseases and chemical hazards produced during the frying process poses a major threat to human health. Coating has been used as a practical method to reduce the oil content and chemical hazard of fried foods. Methyl cellulose (MC) and soy protein isolate (SPI) were used as coating materials to pretreat Chinese fried dough cake (CFDC) before frying. The results showed...
Fri, 03/26/2021 - 06:08
Author(s): Dongnian Sun, Junli Hu, Jianfeng Bai, Hua Qin, Junhua Wang, Jingwei Wang, Xiangui Lin Nanoscale zero-valent iron (nZVI) shows an excellent degradation effect on chlorinated contaminants in soil, but poses a threat to plants in combination with phytoremediation. Arbuscular mycorrhizal (AM) fungus can reduce the phyototoxicity of nZVI, but their combined impacts on polychlorinated...
Fri, 03/26/2021 - 06:08
Author(s): Dong Xu, Puhui Ji, Lu Wang, Xin Zhao, Xiongfei Hu, Xunrong Huang, Hanghang Zhao, Fuhao Liu In this study, a low-temperature roasting and hydrothermal methods were used to modify the fly ash resulting in two new types of adsorption materials - modified fly ash (MFA) and artificial zeolite (ZE). These modified fly ashes, as well as a natural zeolite (ZO) were applied to two types of...
Fri, 03/26/2021 - 02:02
Here we explored the potential association of the benthic macrofauna species composition with aliphatic hydrocarbons, polycyclic aromatic hydrocarbons and metals concentration detected in the sediments of the Yucatan continental Shelf (YCS), Mexico. The main objective was to provide insights on the temporal and spatial changes of such association in the function of the longitudinal and depth...
Thu, 03/25/2021 - 06:16
Author(s): Véronique Dupouy, Jean-Yves Madec, Jessica Wucher, Nathalie Arpaillange, Véronique Métayer, Béatrice Roques, Alain Bousquet-Mélou, Marisa Haenni In the bovine sector, the spread of Enterobacterales producing extended-spectrum and AmpC β-lactamases (ESBL/AmpC) mostly concerns veal calves, and the use of waste milk containing antibiotic residues has been recurrently incriminated. In this...
Thu, 03/25/2021 - 02:02
The purpose of this study was to explore the usefulness of Great Shearwater (Ardenna gravis) as a bioindicator for biomonitoring programs for metal pollution. Three different metals were analysed in liver, kidney, and feathers, including cadmium, lead, and zinc. Glutathione-S-transferase, malondialdehyde, reduced glutathione, and catalase were assessed as oxidative stress biomarkers. Sex-related...
Thu, 03/25/2021 - 02:02
Unsubstituted and methylated polycyclic aromatic hydrocarbons (22 PAHs and 17 Me-PAHs) were examined in surface sediments collected from the Red River and four inner-city rivers of Hanoi City, Vietnam. Concentrations of total PAHs and Me-PAHs ranged from 52 to 920 (median 710) and from 70 to 2600 (median 1000) ng/g dry weight in samples of dry and wet seasons, respectively. Significant...
Thu, 03/25/2021 - 00:00
Bacillus cytotoxicus belongs to the Bacillus cereus group that also comprises the foodborne pathogen Bacillus cereus sensu stricto, Bacillus anthracis causing anthrax, as well as the biopesticide Bacillus thuringiensis. The first B. cytotoxicus was isolated in the context of a severe food poisoning outbreak leading to fatal cases of diarrheal disease. Subsequent characterization of the outbreak...
Wed, 03/24/2021 - 14:04
This paper critically engages with dynamics of the Chinese food safety governance infrastructure following the melamine crisis. It presents a qualitative analysis of 16 in-depth stakeholder interviews in Hunan, Hubei, and Henan. We reveal tensions between a segmented model of governance and a centralized model, between a centralized top-down model and stakeholder participation, and between a...
Wed, 03/24/2021 - 08:02
by Ans Vercammen, Alexandru Marcoci, Mark Burgman Groups have access to more diverse information and typically outperform individuals on problem solving tasks. Crowdsolving utilises this principle to generate novel and/or superior solutions to intellective tasks by pooling the inputs from a distributed online crowd. However, it is unclear whether this particular instance of “wisdom of the crowd”...
Wed, 03/24/2021 - 06:10
Author(s): Huijun Li, Jieshan Wu, Chao Chen, Wenfeng Xin, Wensheng Zhang This study established a method for the simultaneous determination of 74 pesticide residues in Panax notoginseng by QuEChERS pretreatment method coupled with GC-MS/MS, and carried out pesticide residue analysis on 20 batches of market samples in China. The samples were extracted with acetonitrile, cleaned up with primary...
Wed, 03/24/2021 - 06:09
Author(s): Qingyi Wei, Peiyao Zhang, Ting Liu, Hongbin Pu, Da-Wen Sun As a potential carcinogen produced in food thermal processing, acrylamide (AM) can cause irreversible harm to human health. For the detection of AM in food products, a simple fluorescent biosensor based on single-stranded DNA (ssDNA) and carbon quantum dots (CQDs) was developed. Reduced fluorescence intensity of CQDs at 445 nm...
Wed, 03/24/2021 - 06:09
Author(s): Fatemeh Farahbakhsh, Esmaeil Heydari-Bafrooei, Mehdi Ahmadi, Seyedeh Hoda Hekmatara, Mohammad Sabet The gold electrode was functionalized with anti-bisphenol A (BPA) aptamer and captured the BPA as analyte. By dropping the aptamer-modified magnetic Fe3O4/Au nanoparticles solution onto the electrode, a BPA molecule attaches to many aptamers that are in contact with a large number of...
Wed, 03/24/2021 - 06:08
Author(s): Chun-Fa Huang, Shing-Hwa Liu, Chin-Chuan Su, Kai-Min Fang, Cheng-Chieh Yen, Ching-Yao Yang, Feng-Cheng Tang, Jui-Ming Liu, Chin-Ching Wu, Kuan-I Lee, Ya-Wen Chen Bisphenol A (BPA) is recognized as a harmful pollutant in the worldwide. Growing studies have reported that BPA can cause adverse effects and diseases in human, and link to a potential risk factor for development of...
Tue, 03/23/2021 - 06:10
Author(s): Afzal Hussain, Muhammad Rizwan, Shafaqat Ali, Muhammad Zia ur Rehman, Muhammad Farooq Qayyum, Rab Nawaz, Awais Ahmad, Muhammad Asrar, Sajid Rashid Ahmad, Abdulaziz Abdullah Alsahli, Mohammed Nasser Alyemeni Cadmium (Cd) accumulation in arable lands has become a serious matter for food security. Among various approaches, the application of nanoparticles (NPs) for remediation of...
Tue, 03/23/2021 - 02:02
Marine debris and trace metals are among the common environmental contaminants known to affect marine organisms. In this study, the quantitative and qualitative aspects of marine debris levels and bioaccumulation of trace metals (Cadmium: Cd; Copper: Cu; Lead: Pb; and Zinc: Zn) were investigated in 42 green sea turtles (Chelonia mydas) stranded on the northern coast of the Sea of Oman. The...
Tue, 03/23/2021 - 00:01
Combined papermill biosolids (PB) and forest-derived alkaline by-products are known for their direct benefits to agricultural crops, but their residual effects after several years of application have received little attention. A 10 yr field study was initiated on a loamy soil at Yamachiche, QC, to assess the residual effects of PB application after nine consecutive years, either alone or with...
Mon, 03/22/2021 - 22:07
Aquaculture Nutrition, EarlyView. The present experiment containing two dietary cadmium (Cd) levels (0 and 5 mg/kg) and two lipoic acid (LA) levels (0 and 600 mg/kg) was carried out to investigate the effects of dietary Cd on the growth, antioxidant capacity, immunity and intestine morphology of Macrobrachium nipponense and the alleviation effects of LA. We found that dietary Cd and LA had no...
Mon, 03/22/2021 - 16:00
African countries face key challenges in the deployment of GM crops due to incongruities in the processes for effective and efficient commercial release while simultaneously ensuring food and environmental safety. Against the backdrop of the preceding scenario, and for the effective and efficient commercial release of GM crops for cultivation by farmers, while simultaneously ensuring food and...
Mon, 03/22/2021 - 06:08
Author(s): Ling Zheng, Ya-Lin Jiang, Jun Fei, Peng Cao, Chen Zhang, Guo-Fang Xie, Li-Xiang Wang, Wei Cao, Lin Fu, Hui Zhao Environmental cadmium (Cd) exposure can cause several pulmonary diseases. Epithelial-mesenchymal transition (EMT) involved in the process of chronic obstructive pulmonary disease (COPD). However, the association between environmental Cd exposure and EMT was unclear in COPD...
Sun, 03/21/2021 - 02:02
The health status of Sciaenops ocellatus was studied by qualitative and quantitative histopathological analysis through histological damage prevalence and degree of tissue change (DTC) in response to 96 h and 9 days of exposure to 0.1, 0.8, and 8 g/L of light crude oil in seawater. The histology of the liver, spleen, kidney, and gills of the fish were analyzed and compared between treatments. Our...
Sat, 03/20/2021 - 06:14
Author(s): Xi Tian, He Xiao, Yaobin Liu, Weirong Ding The recycling of secondary resources is complicated as consumers, recyclers and governments are all involved in this process. In developing countries, compared to legal recyclers, illegal recyclers not only have cost advantages but also create serious pollution. Inappropriate management policies may cause disorder in the recycling market or...
Sat, 03/20/2021 - 04:02
Both overproduced reactive oxygen species/reactive nitrogen species and hyperglycemic conditions accompany a significant increase in protein glycation and nitration that contribute to the initiation and progression of diabetic complications and neuronal disorders. In this study, 19 compounds, including steroidal saponins, alkaloids, cerebroside, phenolic compounds, sterols, and nucleosides, were...
Sat, 03/20/2021 - 02:03
Ninety-five wild forage plants (belonging to 22 species of 18 families) and their corresponding rhizosphere soil samples were collected from wastelands of a large-scale abandoned Hg mining region for total Hg (THg) and methylmercury (MeHg) analysis. The forage plant communities on the wastelands were dominated by the Asteraceae, Crassulaceae, and Polygonaceae families. The THg and MeHg...
Sat, 03/20/2021 - 02:03
The bioaccumulation of arsenic (As) in the muscle, liver, kidneys, and brain of the shark Sphyrna lewini was measured in 40 juvenile specimens from southeast Gulf of California. Additionally, the biomagnification factor was calculated through prey items from stomach contents of the analyzed specimens. The concentrations of As (mg kg−1, wet weight) were higher in the muscle (10.1 ± 0.3) and liver...
Fri, 03/19/2021 - 16:00
The conversion of mercury (Hg) to monomethylmercury (MMHg) is a critical area of concern in global Hg cycling. Periphyton biofilms may harbor significant amounts of MMHg but little is known about the Hg-methylating potential of the periphyton microbiome. Therefore, we used high-throughput amplicon sequencing of the 16S rRNA gene, ITS2 region, and Hg methylation gene pair (hgcAB) to characterize...
Fri, 03/19/2021 - 16:00
Arsenic mobilization in groundwater systems is driven by a variety of functionally diverse microorganisms and complex interconnections between different physicochemical factors. In order to unravel this great ecosystem complexity, groundwaters with varying background concentrations and speciation of arsenic were considered in the Po Plain (Northern Italy), one of the most populated areas in...
Fri, 03/19/2021 - 14:04
European Snacks Association (ESA) data on acrylamide in potato crisps from 2002 to 2019 (99704 observations) were analysed. Acrylamide levels have plateaued since 2011, although the lowest mean so far was attained in 2018 at 353 ± 2.7 ng g−1: a 54% reduction since 2002. The 85th, 90th and 95th quantiles did show evidence of continued downward progress, the 90th quantile being lower than the 750...

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