Chemical contaminants

Wed, 11/27/2019 - 03:36
Author(s): Na Wang, Kezhen Qian, Dezhen Chen, Hengzhen Zhao, Lijie YinAbstractThe gas and oil product derived from municipal solid waste (MSW) pyrolysis was upgraded by utilizing the interaction between the volatile compounds and the char and the mechanism involved is explored. The influences of operation parameters, including interaction temperature, char/volatiles mass ratio (C/V) and gas...
Wed, 11/27/2019 - 03:34
Author(s): Carlos Flores-Ortiz, Lilia M. Alvarez, Alejandro Undurraga, Daniela Arias, Felipe Durán, Guillermo Wegener, Claudia StangeAbstractDaucus carota is a biennale crop that develops an edible storage root. Orange carrots, the most consumed cultivar worldwide, accumulate high levels of β-carotene and α-carotene in the storage root during secondary growth. Genes involved in β-carotene...
Wed, 11/27/2019 - 03:33
Author(s): Priyanka Mahadappa, Narayanan Krishnaswamy, Mahendran Karunanidhi, AG Bhanuprakash, BV Bindhuja, Sahadeb DeyAbstractRumen impaction by plastic waste (PW) is a common condition in the developing countries where ruminants are reared under extensive grazing. As heavy metals (HM) are used in the manufacture of plastic, we hypothesized that buffaloes with PW impaction would have suboptimal...
Wed, 11/27/2019 - 03:31
Concern about the safety of acrylamide in french fries led to the identification of potato varieties low in the acrylamide precursors asparagine and reducing sugars that vary with variety, nitrogen (N) fertilizer applications, and other factors, but produce light‐colored fries, which may not appeal to consumers. New potato varieties shown to produce low‐acrylamide fries, AF4296‐3 and Easton, and...
Wed, 11/27/2019 - 03:27
BACKGROUND Heavy metal resistant bacterium Enterobacter sp. C1D was evaluated for cadmium (Cd) mediated exopolysaccharide production, biofilm formation and legume root colonization ability under Cd stress to alleviate metal induced stress. RESULTS The plant was sensitive to Cd (IC50 3‐ 4μg/ml), while the bacterium showed high Cd tolerance (MIC99 120 μg/ml). Confocal laser scanning microscopy of...
Wed, 11/27/2019 - 03:27
Chlorpyrifos is a type of organophosphate insecticide used extensively in the plantation of tomatoes, a worldwide popular food. However, chlorpyrifos residues on tomatoes bring risks to human health considering the consumption level of tomato is relatively high across many countries. Accurate detection and strict regulation of chlorpyrifos residues are very important in controlling health risks...
Wed, 11/27/2019 - 03:26
Abstract Background Arsenic (As) and cadmium (Cd) are two toxic elements that have a relatively high risk of transfer from paddy soil to rice grain. Rice is a major dietary source of these two elements for populations consuming rice as a staple food. Reducing their accumulation in rice grain is important for food safety and human health. Scope We review recent progress in understanding the...
Wed, 11/27/2019 - 03:26
Edwardsiella piscicida is a pathogenic bacterium responsible for significant losses in important wild and cultured fish species. E. piscicida strain MS-18-199 recovered from a diseased hybrid catfish from East Mississippi and showed resistance to florfenicol, chloramphenicol, oxytetracycline, doxycycline, erythromycin, tetracycline, azitromycin, spectinomycin, sulfonamide, and bacitracin. To...
Tue, 11/26/2019 - 03:38
by Anna Minchom, Daisy Mak, Ranga Gunapala, David Walder, Rajiv Kumar, Nadia Yousaf, Andrew Hodgkiss, Jaishree Bhosle, Sanjay Popat, Mary E. R. O’Brien Objectives Vitamin supplementation reduces pemetrexed toxicity. Raised plasma homocysteine reflects deficiency in vitamin B12 and folate, and is suppressed by supplementation. This observational study of 112 patients receiving pemetrexed-based...
Tue, 11/26/2019 - 03:27
A novel Gram-negative, aerobic, motile and rod-shaped bacterium with the potential to biodegrade polycyclic aromatic hydrocarbons, was isolated from Khazar (Caspian) Sea. Strain TBZ2T grows in the absence of NaCl and tolerates up to 8.5% NaCl. Growth occurred at pH 3.0–10.0 (optimum, pH 6.0–7.0) and 10–45 °C (optimum, 30 °C). The major fatty acids are C18:1ω7C, C16:1ω7C/ C15:0 iso 2-OH, C16:0,...
Tue, 11/26/2019 - 03:26
Context-specific GEnome-scale metabolic Network REconstructions (GENREs) provide a means to understand cellular metabolism at a deeper level of physiological detail. Here, we use transcriptomics data from chemically-exposed rat hepatocytes to constrain a GENRE of rat hepatocyte metabolism and predict biomarkers of liver toxicity using the Transcriptionally Inferred Metabolic Biomarker Response...
Tue, 11/26/2019 - 03:26
This study was performed to examine the transgenerational effects of bisphenol (BP) A analogs, BPE, and BPS on male reproductive functions using mice as a model. CD-1 mice (F0) were orally exposed to control treatment (corn oil), BPA, BPE, or BPS (0.5 or 50 µg/kg/day) from gestational day 7 (the presence of vaginal plug = 1) to birth. Mice from F1 and F2 offspring were used to generate F3 males....
Tue, 11/26/2019 - 03:26
Gestational exposure to bisphenol A (BPA) can lead to offspring insulin resistance. However, despite the role that the skeletal muscle plays in glucose homeostasis, it remains unknown whether gestational exposure to BPA, or its analog bisphenol S (BPS), impairs skeletal muscle development. We hypothesized that gestational exposure to BPA or BPS will impair fetal muscle development and lead to...
Tue, 11/26/2019 - 03:26
The aryl hydrocarbon receptor (AhR) activation has been shown to alter proliferation, apoptosis, or differentiation of adult rat liver progenitors. Here, we investigated the impact of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-mediated AhR activation on a human model of bipotent liver progenitors, undifferentiated HepaRG cells. We used both intact undifferentiated HepaRG cells, and the cells with...
Mon, 11/25/2019 - 03:33
Author(s): Irene Dervisi, Chrysanthi Valassakis, Adamantia Agalou, Nikolaos Papandreou, Varvara Podia, Kosmas Haralampidis, Vassiliki A. Iconomidou, Vassili N. Kouvelis, Herman P. Spaink, Andreas RoussisAbstractPhospholipase PLA1-Iγ2 or otherwise DAD1-LIKE LIPASE 3 (DALL3) is a member of class I phospholipases and has a role in JA biosynthesis. AtDALL3 was previously identified in a yeast two-...
Sun, 11/24/2019 - 03:48
Author(s): Antoine Rostang, Jacques Devos, Christophe ChartierAbstractEprinomectin (EPM) has been recently granted a marketing authorisation in the European Union for use in goats, with a zero-day milk withdrawal period. Considering the high prevalence of benzimidazole resistance worldwide and the economic implications of managing milk residues, EPM may today be considered the main (or even the...
Sun, 11/24/2019 - 03:47
Author(s): Wenjia Jin, Zhigang Wang, Yafei Sun, Yongjie Wang, Chunjuan Bi, Limin Zhou, Xiangmin ZhengAbstractHuman exposure to arsenic (As) through rice consumption is a global food safety issue, especially in Southeast Asia. To investigate the impacts of biochar amendment (rice husk and smooth cordgrass-derived biochar) and/or silicate fertilizer on As mobility/phytoavailability in soil and on...
Sun, 11/24/2019 - 03:41
Few published studies have examined whether the elevated concentrations of the nonessential toxic metal mercury (Hg) often observed in shark muscle also occur in the shark brain or whether Hg accumulation affects shark neurophysiology. Therefore, this study examined accumulation and distribution of Hg in the shark brain, as well as effects of Hg on oxidative stress in the shark central nervous...
Sat, 11/23/2019 - 03:33
Author(s): Neus González, Sara C. Cunha, Ricardo Ferreira, José O. Fernandes, Montse Marquès, Martí Nadal, José L. DomingoAbstractThe present study was aimed at assessing the exposure of an adult population to nine BPs analogues (BPA, BPS, BPF, BPB, BPAF, BPZ, BPE, BPAP and BPP) through a duplicate diet study. Up to 40 canned and non-canned food samples were purchased from Tarragona (Catalonia,...
Sat, 11/23/2019 - 03:32
Author(s): Nijira Brahma, Abhik GuptaAbstractThe median lethal concentrations (LC50) of Pb at 96 h were 8.84, 192.14, and 3.22 mg L−1 for pre-reproductive and reproductive individuals of Lamellidens jenkinsianus obesa and reproductive individuals of Parreysia (Parreysia) corrugata, respectively. Thus, young L. j. obesa were much more sensitive to Pb than its adults, while P. (P.) corrugata was...
Sat, 11/23/2019 - 03:32
Author(s): Chuanfeng Teng, Jianbo Jia, Zhiping Wang, Bing YanAbstractSynergistic toxicity from multiple environmental pollutants poses greater threat to humans, especially to susceptible pregnant population. Here we evaluated combined toxicity from environment pollutants zinc oxide nanoparticles (ZnO NPs) and cadmium chloride (CdCl2) using two pregnant mice models established by oral...
Sat, 11/23/2019 - 03:32
Author(s): Peng Zeng, Zhaohui Guo, Xiyuan Xiao, Chi Peng, Lingqing Liu, Demei Yan, Yalei HeAbstractFast growing woody plants are proposed for potential application for phytoremediation of contaminated soil. In this study, the plant growth, physiological responses, mineral element uptake, and phytoremediation potential of the woody plant Morus alba L. were studied in different levels of Cd-...
Sat, 11/23/2019 - 03:30
The abuse of pesticides in home gardens may lead to contamination of home‐grown eggs. This study aimed to determine the prevalence of hexachlorocyclohexane (HCH), aldrin, and malathion pesticides residues in egg white and egg yolk of home‐grown eggs in Jordan; and the effect of refrigerated storage and heat treatment (boiling and frying) on residues level. High‐performance liquid chromatography...
Sat, 11/23/2019 - 03:26
Abstract Background and Aims Environmental fluctuations due to anthropogenic activities show negative effects on plant growth and crop production. Among the heavy metals, cadmium (Cd) pollution is most dangerous and is devastating most of the cultivable land. The current study evaluated the Cd induced toxicity in Lycopersicon esculentum plants and the mitigating role of rhizobacteria. Methods...
Fri, 11/22/2019 - 03:37
Multidrug efflux pumps play an important role in antibiotic resistance in bacteria. In Pseudomonas aeruginosa, the MexXY pump provides intrinsic resistance to many antimicrobials, including aminoglycosides. The expression of the mexXY operon is negatively regulated by the MexZ repressor. This repression is alleviated in response to antibiotic-induced ribosome stress, which results in increased...
Fri, 11/22/2019 - 03:37
Spores are required for long-term survival of many organisms, including most fungi. For the majority of fatal human fungal pathogens, spore germination is the key process required to initiate vegetative growth and ultimately cause disease. Because germination is required for pathogenesis, the process could hold fungus-specific targets for new antifungal drug development. Compounds that inhibit...
Fri, 11/22/2019 - 03:33
Author(s): L. Heras-González, J.A. Latorre, M. Martinez-Bebia, D. Espino, F. Olea-Serrano, M. Mariscal-ArcasAbstractPhytoestrogens are natural components of plants, including numerous foods that form part of the habitual diet of humans and animals. They have similar estrogenic effects to those of synthetic endocrine disrupters such as monomers of plastic materials, e.g., polycarbonates and epoxy...
Fri, 11/22/2019 - 03:32
Author(s): Wankui Jiang, Qinqin Gao, Lu Zhang, Hui Wang, Mingliang Zhang, Xiaoan Liu, Yidong Zhou, Zhijian Ke, Chenglong Wu, Jiguo Qiu, Qing HongAbstractA novel carbofuran-degrading strain CFD-1 was isolated and preliminarily identified as Sphingbium sp. This strain was able to utilize carbofuran as the sole carbon source for growth. The carbofuran hydrolase gene cehA was cloned from strain CFD-1...
Fri, 11/22/2019 - 03:32
Author(s): Eloy Navarro-León, Juan Manuel Ruiz, Alfonso Albacete, Begoña BlascoAbstractCadmium (Cd) is one of the most toxic heavy metals that reduces crop productivity and is a threat to all the food chain including human health. Phytoremediation is an environmentally friendly strategy to clean up soil contaminated with heavy metals. Researchers are selecting new varieties with an enhanced...
Fri, 11/22/2019 - 03:32
Author(s): Fuyu Guo, Changfeng Ding, Zhigao Zhou, Fengxiang Han, Ronggui Tang, Gaoxiang Huang, Xingxiang WangAbstractProper protocols for assessing the remediation effectiveness of contaminated soils are an important part of remediation projects. In the present study, the residual immobilization effectiveness of hydrated lime (L), hydroxyapatite (H), biochar (B) and organic fertilizer (F) alone...
Fri, 11/22/2019 - 03:32
Author(s): Biao Hu, Bin Tong, Ying Xiang, Se-Ruo Li, Zhu-Xia Tan, Hui-Xian Xiang, Lin Fu, Hua Wang, Hui Zhao, De-Xiang XuAbstract1-Nitropyrene (1-NP), a key component of fine particulate matter (PM2.5), is a representative of nitrated polycyclic aromatic hydrocarbons (NPAHs). The aim of this research is to investigate proinflammatory effects of acute 1-NP exposure in mouse lungs and human A549 ...
Fri, 11/22/2019 - 03:26
ABSTRACT To investigate Molybdenum (Mo) and Cadmium (Cd) co-induced the levels of autophagy-related genes via AMPK/mTOR signaling pathway in Shaoxing Duck (Anas platyrhyncha) kidney, 60 healthy 11-day-old ducks were randomly divided into 6 groups, which were treated with Mo or/and Cd at different doses on the basal diet for 120 d. Kidney samples were collected on day 120 to determine the mRNA...
Fri, 11/22/2019 - 03:26
ABSTRACT The poultry industry has recently undergone transitions into antibiotic free production, and viable antibiotic alternatives, such as probiotics, are necessary. Through in ovo probiotic inoculation, beneficial microflora development in the gastrointestinal tract may occur prior to hatch without negatively impacting chick performance. Therefore, the objective of the present study was to...
Thu, 11/21/2019 - 03:37
by Kelsey A. Behrens, Leigh A. Jania, John N. Snouwaert, MyTrang Nguyen, Sheryl S. Moy, Andrey P. Tikunov, Jeffrey M. Macdonald, Beverly H. Koller Environmental and endogenous electrophiles cause tissue damage through their high reactivity with endogenous nucleophiles such as DNA, proteins, and lipids. Protection against damage is mediated by glutathione (GSH) conjugation, which can occur...
Thu, 11/21/2019 - 03:26
BACKGROUND The research focused on the evaluation of the impact of cover cropping on trace metals (Fe, Mn, Cu, Zn, Pb, Co and Cd) and nutrients in vineyard soils and Vitis vinifera L. For this purpose, two types of cover crops (Lolium perenne L. and Medicago sativa L.) and their mixture were planted between vine rows of Muscat white in the vineyard in South Crimea. Trace elements, nutrients and...
Thu, 11/21/2019 - 03:26
The health status of the commercial Tehuelche scallop Aequipecten tehuelchus from San Román and El Riacho in San José gulf (Patagonia, Argentina) was evaluated through biomarkers widely used in ecotoxicological applications. Natural levels of arsenic (As) and cadmium (Cd) were measured to determine their potential relationships with fluctuations of several oxidative stress biomarkers in the...
Thu, 11/21/2019 - 03:25
Cadmium (Cd) contamination in water resources has become a potentially serious threat to public health and environment across the globe. In this experiment, we investigated the capacity of titanium dioxide nanoparticles (TiO2 NPs) for selective removal of Cd from wastewater. The TiO2 NPs were prepared using newly developed sol-gel method and sorption attributes were investigated as a function of...
Thu, 11/21/2019 - 03:25
The presence of ear rots in maize caused by Aspergillus flavus that are also associated with the production of aflatoxins has evolved into an increasing problem over the last few years. Since no commercial biological control products are still available to control A. flavus in maize in Europe, this study targets to the evaluation of six biopesticides/biostimulants (Botector®, Mycostop®, Serenade...
Thu, 11/21/2019 - 03:25
It has been reported that Heteropodatoxin3 (HpTx3), a peptidic neurotoxin purified from the venom of the spider species Heteropoda venatoria, could inhibit Kv4.2 channels. Our present study newly found that HpTx3 also has potent and selective inhibitory action on Nav1.7, with an IC50 of 135.61 ± 12.98 nM. Without effect on the current–voltage (I-V) relationship of Nav1.7,...
Thu, 11/21/2019 - 03:25
A pheochromocytoma of the rat adrenal medulla derived (a.k.a. PC12) cell-based assay for dopamine measurement by luminescence detection was customized for the qualitative evaluation of agonists and antagonists of nicotinic acetylcholine receptors (nAChRs). The assay mechanism begins with ligand binding to transmembrane nAChRs, altering ion flow into the cell and inducing dopamine release from the...
Wed, 11/20/2019 - 04:02
Author(s): Svetlana V. Klinova, Ilzira A. Minigalieva, Larisa I. Privalova, Irene E. Valamina, Oleg H. Makeyev, Eugene A. Shuman, Artem A. Korotkov, Vladimir G. Panov, Marina P. Sutunkova, Julia V. Ryabova, Tatiana V. Bushueva, Tatiana N. Shtin, Vladimir B. Gurvich, Boris A. KatsnelsonAbstractOutbred male rats were repeatedly injected intraperitoneally two-level sub-lethal doses of lead acetate...
Wed, 11/20/2019 - 04:00
Author(s): Ellen Cristina Rivas Leonel, Silvana Gisele Pegorin Campos, Luiz Henrique Alves Guerra, Carolina Marques Bedolo, Patrícia Simone Leite Vilamaior, Marilia Freitas Calmon, Paula Rahal, Christiani Andrade Amorim, Sebastião Roberto TabogaAbstractHormonal regulation controls mammary gland (MG) development. Therefore some hormone-related factors can disrupt the early phases of MGs...
Wed, 11/20/2019 - 03:52
46% of raw and 14% of ready‐to‐eat vegetable samples from Arusha city were contaminated with pesticide residues from the groups of organophosphates pyrethroids and organochlorines. Washing of vegetables twice or more and changing the washing water after each use (p = .01) or peeling (p = .008) was significantly associated with a reduction of pesticide residues in them. There was a significant...
Wed, 11/20/2019 - 03:46
Cadmium (Cd) pollution is constantly increasing in agricultural systems due to anthropogenic activities and causes significant reductions in the yield of crop species. In this study, we aimed to determine the effect of Cd stress on growth, element contents, oxidative damage, antioxidant enzyme activities, and genotoxicity in wheat (Triticum aestivum L.). To achieve this goal, 7-day-old wheat...
Wed, 11/20/2019 - 03:45
The issues of heavy metal contamination in water sources have been increasing substantially along with the rapid pace of industrial revolution. Lead, particularly, is one of the heavy metals that received considerable attention lately due to its frequent detection in the environment and hazardous effects. Although conventional water treatment processes had been utilized for ages, it is still a...
Wed, 11/20/2019 - 03:44
To understand the impact reduced mercury (Hg) loading and invasive species have had on methylmercury bioaccumulation in predator fish of Lake Michigan, we reconstructed bioaccumulation trends from a fish archive (1978 to 2012). By measuring fish Hg stable isotope ratios, we related temporal changes in Hg concentrations to varying Hg...
Wed, 11/20/2019 - 03:44
Lead pacemaker infection is a complication on the rise. An infected oscillating mass attached to the leads (ILV) is a common finding in this setting. Percutaneous extraction of the leads and of the device is the best curative option. However, extraction of leads with large masses can be complicated by pulmonary embolism. The aim of this study was to understand the factors associated with large...
Tue, 11/19/2019 - 03:38
by Mehreen Gul, Muhammad Fakhar, Najumuddin, Sajid Rashid P21-activated kinases (PAKs) are serine/threonine protein kinases that are subdivided into two groups on the basis of their domain architecture: group-I (PAK1–3) and group-II (PAK4–6). PAKs are considered as attractive drug targets that play vital role in cell proliferation, survival, motility, angiogenesis and cytoskeletal dynamics. In...
Tue, 11/19/2019 - 03:34
Author(s): Bian-hua Zhou, Liu-shu Jia, Hong-wei Guo, Hai-yan Ding, Jing-yun Yang, Hong-wei WangAbstractEimeria tenella, an obligate intracellular parasite, can actively invade the cecal epithelial cells of chickens and cause severe enteric disease. Eukaryotic elongation factor 2 (eEF2) plays a major role in protein synthesis and cell survival. This study aims to explore the exact mechanisms...

Pages