Chemical contaminants

Wed, 05/26/2021 - 22:10
Journal of Food Biochemistry, EarlyView. Lead nitrate (LN) and cadmium chloride (CdCl2), regarded as environmental contaminants, are toxic heavy metals. Sesamol is a dietary phytochemical found in sesame oil. We aimed to analyze the hepatotoxic and nephrotoxic effects of LN and CdCl2 and to evaluate the possible protective effect of sesamol. LN (90 mg/kg bw per day), CdCl2 (3 mg/kg bw per day),...
Wed, 05/26/2021 - 06:10
Author(s): Hong Zhang, Kate Heal, Xiangdong Zhu, Mulualem Tigabu, Yanan Xue, Chuifan Zhou Cadmium (Cd) is one of the most toxic environmental pollutants affecting the growth and reproduction of various plants. Analysis of the biological adaptation and tolerance mechanisms of the hyperaccumulator Erigeron annuus to Cd stress may help identify new plant species for phytoremediation and in...
Wed, 05/26/2021 - 06:10
Author(s): Lijun Li, Bao Jiang, Yanan Wan, Jumei Li, Yibing Ma It is significant to derive an appropriate cadmium (Cd) threshold for the rice to ensure that the Cd concentration of rice grains meets the food safety standards. In the present study, soil thresholds for Cd were derived using the method of species sensitivity distribution based on aging time, cultivars, and soil properties. Dataset...
Tue, 05/25/2021 - 22:11
Journal of Separation Science, Accepted Article. Bubble-bursting flow microextraction combined with gas chromatography as a green and sustainable microextraction method is used to determine some organophosphorus pesticide residues in water samples. The extraction process occurs at the surface of liquid-gas contact, where the analytes interact with the gas molecules in the bubble. The analytes are...
Mon, 05/24/2021 - 04:04
Cadmium (Cd) accumulation in agricultural soils is an increasingly serious problem, as plants absorb Cd, which inhibits their growth and development. Nonetheless, the molecular mechanisms underlying Cd detoxification and accumulation in wheat (Triticum aestivum L.) are unclear. Here, we isolated the U-box E3 ligase TaPUB1 from wheat and reported the functional characterization of TaPUB1 in Cd...
Mon, 05/24/2021 - 02:03
Dragonflies (Order Odonata) often are considered to be biosentinels of environmental contamination, e.g., heavy metals and/or persistent organic pollutants (POPs). Dragonflies (n = 439) belonging to 15 species of 8 genera were collected from an abandoned mercury (Hg) mining region in China to investigate the bioaccumulation of total Hg (THg) and methylmercury (MeHg). THg and MeHg concentrations...
Mon, 05/24/2021 - 02:02
Soils containing high concentrations of metals were treated using a soil washing process. The hypothesis was that metals could be concentrated in a single or small number of fine fractions which could be removed and disposed of to treat the contaminated soil. Lead and zinc were shown to be distributed over the > 4000, 2000–4000, 600–2000, 180–600, 38–180, 38–23, and < 9 µm soil size...
Sun, 05/23/2021 - 02:03
Juvenile common carp were treated with Cd2+ at a sublethal concentration for Cyprinidae (6.4 mg/L). The expression of N-methyl-D-aspartate receptor subunit genes (NR2A, NR2B) and ATP-binding cassette subfamily C member 1 gene (ABCC1) was compared between treated and untreated fish. In addition, cadmium accumulation in the fish tissues was assessed. NR2A was 18.9-fold upregulated by Cd2+ in the...
Sun, 05/23/2021 - 02:02
Activities associated with mining operations including smelting, ore handling, and mine tailings management have been identified as sources of dust and aerosol that may contain metal and metalloid contaminants, such as lead (Pb) and arsenic (As). Previous studies on contaminant transport have concentrated on the potential impact of these particulate emissions in outdoor environments. The purposes...
Sat, 05/22/2021 - 06:23
Author(s): Peipei Zhou, Wei Zhang, Xuedong Wang Inevitably, the residues of polycyclic aromatic hydrocarbons (PAHs) in tea leaves will be transferred to hot tea infusion, constituting a certain drinking risk; consequently, it is imperative to develop rapid, sensitive, and robust approaches for their trace-level detection. Herein, we developed a syringe membrane-based microextraction (SMME) method...
Sat, 05/22/2021 - 06:23
Author(s): Xiao-Xing Wang, Lu Liu, Xiao-Li Wang, Gui-Ju Xu, Ru-Song Zhao, Ming-Lin Wang, Jin-Ming Lin, Xia Wang Developing and establishing an efficient pre-treatment approach for the precise extraction of nitrated-polycyclic aromatic hydrocarbons (N-PAHs) from real-life samples is critical for ensuring their safety. In this study, a novel crystalline magnetic covalent organic framework with a...
Sat, 05/22/2021 - 04:03
Given the relevance of organophosphorus pesticides (OPs) with food safety, it is highly urgent to develop sensitive and reliable sensors for OPs. However, most of the OP sensors are developed based on colorimetric and fluorescent techniques, which are limited to severe interference of color and fluorescence from pigments and organic acids in agricultural crops. Herein, we develop an inorganic...
Sat, 05/22/2021 - 02:03
Atmospheric, soil, and feces samples were collected in Ny-Ålesund during July 2015. The concentrations, distributions, congener profiles, and contaminant migration levels were analyzed for 16 polycyclic aromatic hydrocarbons (PAHs) identified by the United States Environmental Protection Agency (US EPA) as priority contaminants (16 PAHs). Mean concentrations in the gas and particle phases were 37...
Sat, 05/22/2021 - 00:00
The constant use of synthetic antibiotics as growth promoters can cause bacterial resistance in chicks. Consequently, the use of these drugs has been restricted in different countries. In recent years, antimicrobial peptides have gained relevance due to their minimal capacity for bacterial resistance and does not generate toxic residues that harm the environment and human health. In this study, a...
Fri, 05/21/2021 - 16:00
This study introduces a valuable laccase, designated ThLacc-S, purified from white rot fungus Trametes hirsuta. ThLacc-S is a monomeric protein in nature with a molecular weight of 57.0 kDa and can efficiently metabolize endocrine disrupting chemicals. The enzyme was successfully purified to homogeneity via three consecutive steps consisting of salt precipitation and column chromatography,...
Fri, 05/21/2021 - 16:00
Animal manure is a reservoir of antibiotic resistance genes (ARGs), and direct application of the manure will lead to spread of ARGs in farmland. Here, we explored the impacts of chicken manure and heat-treated chicken manure on the patterns of soil resistome after 3 years’ application, with mushroom residues set as the plant-derived organic manure treatment. A total of 262 ARG subtypes were...
Fri, 05/21/2021 - 16:00
The European epidemic monophasic variant of Salmonella enterica serovar Typhimurium (S. 1,4,[5],12:i:-) characterized by the multi locus sequence type ST34 and the antimicrobial resistance ASSuT profile has become one of the most common serovars in Europe (EU) and the United States (US). In this study, we reconstructed the time-scaled phylogeny and evolution of this Salmonella in Europe. The...
Fri, 05/21/2021 - 14:06
An average 50 ml breast milk samples were collected from 21 lactating primiparous mothers (range 25 to 45 years, mean 33 years), 4–8 weeks after delivery in Penang Island, Malaysia. The geometric mean concentration of the most toxic congeners, 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) was 0.14 pg WHO2005-TEQ g−1 zlipid. The most abundant congeners of PCDD/Fs were octachlorodibenzo-p-...
Fri, 05/21/2021 - 06:10
Author(s): Julia Baudry, Pauline Rebouillat, Benjamin Allès, Jean-Pierre Cravedi, Mathilde Touvier, Serge Hercberg, Denis Lairon, Rodolphe Vidal, Emmanuelle Kesse-Guyot Purpose To examine dietary exposure to 25 pesticide residues in several diet groups including omnivores, pesco-vegetarians, vegetarians and vegans while accounting for the farming system (organic or conventional) of plant-based...
Fri, 05/21/2021 - 02:03
Heavy metals are continuously released into the oceans from both natural and anthropogenic sources. They are serious threats to both ecosystem and human health because of their toxicity, persistence, bioaccumulation, and biomagnification. We present metal concentrations in the economically important bluefish from Iskenderun Bay, providing valuable information on Northeastern Mediterranean aquatic...
Fri, 05/21/2021 - 02:02
River water-column and bottom-sediments samples were screened for 160 pesticide compounds to compare the types of pesticides present in the water-column versus bottom-sediments, and between segments of rivers flowing through intensively-managed versus semi-natural habitats. Of the 35 pesticide compounds detected, current-use pesticides accounted for 96% (water) and 76% (bottom sediments)....
Thu, 05/20/2021 - 16:00
Sweet sorghum has potential for phytoextraction of cadmium (Cd) owning to its large biomass and relatively high Cd tolerance. Nitrogen affects both growth and Cd concentrations in plants. However, different forms of nitrogen effects on Cd accumulation in sweet sorghum to improve efficiency of Cd phytoremediation is still elusive. In this study, nitrate substantially promoted both dry weight and...
Thu, 05/20/2021 - 06:23
Author(s): Ge Chen, Guangyang Liu, Huiyan Jia, Xueyan Cui, Yuanshang Wang, Dongyang Li, Weijia Zheng, Yongxin She, Donghui Xu, Xiaodong Huang, A.M. Abd El-Aty, Jianchun Sun, Haijin Liu, Yuting Zou, Jing Wang, Maojun Jin, Bruce D. Hammock Organophosphate pesticides (OPs) are often used as insecticides and acaricides in agriculture, thus improving yields. OP residues may pose a serious threat, due...
Thu, 05/20/2021 - 06:20
Author(s): Guofeng Xu, Shuang Liu, Mingquan Huang, Xue Jiang, Meng Yang Cadmium (Cd) is an important industrial and environmental pollutant, which is closely correlated with female infertility. Although Cd-induced developmental disorders of human ovarian follicles have been widely reported, the underlying mechanisms remain not fully elucidated. In this study, we explored the mechanism underlying...
Wed, 05/19/2021 - 10:03
ABSTRACT The emergence of the plasmid-mediated high-level tigecycline resistance mechanism Tet(X) threatens the role of tigecycline as the "last-resort" antibiotic in the treatment of infections caused by carbapenem-resistant Gram-negative bacteria. Compared with that of the prototypical Tet(X), the enzymatic activities of Tet(X3) and Tet(X4) were significantly enhanced, correlating with high-...
Wed, 05/19/2021 - 10:02
Escherichia coli is the most commonly identified human pathogen and a prominent microorganism of the gut microbiota. Acquired resistance to antibiotics in this species is driven mainly by horizontal gene transfer and plasmid acquisition. Currently, the main concern is the acquisition of extended-spectrum β-lactamases of the CTX-M type in E. coli, a worldwide-observed phenomenon. Plasmids...
Wed, 05/19/2021 - 10:02
Leishmaniasis and Chagas are among the most significant neglected tropical diseases. Due to several drawbacks with the current chemotherapy, developing new antikinetoplastid drugs has become an urgent issue. In the present work, a bioassay-guided investigation of the root bark of Maytenus chiapensis on Leishmania amazonensis and Trypanosoma cruzi led to the identification of two D:A-friedo-nor-...
Wed, 05/19/2021 - 10:02
The intestinal protozoan Cryptosporidium is a leading cause of diarrheal disease and mortality in young children. There is currently no fully effective treatment for cryptosporidiosis, which has stimulated interest in anticryptosporidial development over the last ~10 years, with numerous lead compounds identified, including several tRNA synthetase inhibitors. Here, we report the results of a...
Wed, 05/19/2021 - 08:03
by Sang Ho Park, Haley Siddiqi, Daniela V. Castro, Anna A. De Angelis, Aaron L. Oom, Charlotte A. Stoneham, Mary K. Lewinski, Alex E. Clark, Ben A. Croker, Aaron F. Carlin, John Guatelli, Stanley J. Opella SARS-CoV-2 is the novel coronavirus that is the causative agent of COVID-19, a sometimes-lethal respiratory infection responsible for a world-wide pandemic. The envelope (E) protein, one of...
Wed, 05/19/2021 - 08:03
by Eui-Jin Kim, Oh Hoon Kwon, Shin Hyoung Park, Dong-Kyu Kim, Koohong Chung Detecting high-collision-concentration locations based solely on collision frequency may produce different results compared to those considering the severities of the collisions. In particular, it can lead government agencies focusing sites with a high collision frequency while neglecting those with a lower collision...
Wed, 05/19/2021 - 06:12
Author(s): Jan Sácký, Jiří Černý, Jiří Šantrůček, Jan Borovička, Tereza Leonhardt, Pavel Kotrba Cystoderma carcharias is one of the few macrofungal species that can hyperaccumulate Cd. As we have previously documented in C. carcharias collected from a smelter-polluted area, it stores 40% of Cd and nearly 90% of Cu in sporocarps in complex(es) of identical size. In this paper we examined whether...
Wed, 05/19/2021 - 06:09
Author(s): Yulin Xiang, Furen Kang, Qiang Li Particulate organic matter (POM) is an effective adsorbent for decreasing the contaminant of cadmium, but little is known about the relevant mechanisms under the effect of plant. In this work, POM were used to study the removal of Cd2+ in the initial concentration range of 0–4.46 mmol L-1 at pH 5.5, and the effect of Artemisia ordosica roots and pH on...
Wed, 05/19/2021 - 06:08
LWT
Author(s): B. Acoglu, P. Yolci Omeroglu Washing, which is the first step in both household and industrial scale food processing, contributes to the reduction of pesticide residues over the surface of fruits. In this study, it was aimed to investigate the effectiveness of different type of non-toxic washing agents (tap water and different concentrations of sodium carbonate, sodium chloride, acetic...
Wed, 05/19/2021 - 04:07
Exploring novel p-hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) inhibitors has become one of the most promising research directions in herbicide innovation. On the basis of our tremendous interest in exploiting more powerful HPPD inhibitors, we designed a family of benzyl-containing triketone-aminopyridines via a structure-based drug design (SBDD) strategy and then synthesized them....
Wed, 05/19/2021 - 02:03
High concentrations of heavy metals in mine soil disturb the interactions between legumes and microorganisms leading to select strains adapted to these specific conditions. In this work, we analyzed the diversity of fifty strains isolated from Trifolium sp. nodules growing on Pb–Zn mine soil, in the Northeastern of Algeria and highlighted their potential symbiotic traits. The phylogeny of the 16S...
Wed, 05/19/2021 - 02:03
Increasing environmental pollutants such as heavy metals have become one of the most severe health dangers because of rapid industrialization. Exposure to lead and nickel heavy toxic metals can lead to hazardous diseases affecting most of the organs in humans. Bioremediation is a process that uses the ability of microorganisms or plants to detoxify environmental contaminants at lower costs than...
Tue, 05/18/2021 - 22:10
Journal of Food Processing and Preservation, Accepted Article. The physicochemical characteristics and chemical safety of two categories of grilled meat from Niger were assessed, using sun drying and optionally wood fire grilling processes. Contamination factors associated with the critical unit operations were identified and the technological parameters were monitored through these processes....
Tue, 05/18/2021 - 22:10
Journal of Food Processing and Preservation, Accepted Article. Iran is the most important exporter of pistachios in the world. One of pistachio export challenges is the damage of pistachio by warehouse pests. Many efforts have been made to discover alternative methods of non-toxic pest control. To study the effect of the cold plasma jet on P. interpunctella of pistachio nut, three treatment...
Tue, 05/18/2021 - 14:06
The current work aimed to study the effect of adding gum Arabic and varying fat (butter) contents on the physicochemical characteristics of gluten-free quinoa cakes and compared it to cakes made from 100% wheat flour and control quinoa flour. Gum Arabic (GA) was supplemented in three levels (0.1, 0.5, and 1%, w/w) while fat was simultaneously reduced at 25, 50, and 75% (w/v) during the...
Tue, 05/18/2021 - 12:00
Background Our goal was to identify genetic risk factors for cutaneous leishmaniasis (CL) caused by Leishmania braziliensis. Methods Genotyping 2066 CL cases and 2046 controls using Illumina HumanCoreExomeBeadChips provided data for 4 498 586 imputed single-nucleotide variants (SNVs). A genome-wide association study (GWAS) using linear mixed models took account of genetic diversity/ethnicity/...
Tue, 05/18/2021 - 02:03
Some effects of biochar on soil properties (such as pore water DOC) are not very clear. The changes of soil properties [cation exchange capacity (CEC)], pore water properties [pH, dissolved organic carbon (DOC), and Cd concentration (CPW-Cd)], Cd concentration measured by diffusive gradients in thin films (CDGT-Cd), and available Cd content (Cd in weak acid extractable state and reducible state,...
Tue, 05/18/2021 - 02:02
Abstract Background and aims In China and several other rice growing countries, lime application is a common practice to alleviate soil acidification in rice paddies. Liming may also reduce the concentration of the common toxin Cadmium (Cd) in rice plants. We evaluated to what extent lime application affects rice yield and grain Cd concentration. Methods We conducted a meta-analysis to...
Mon, 05/17/2021 - 06:12
Author(s): Miray Öner, Süleyman Bodur, Cansu Demir, Elif Yazıcı, Sezin Erarpat, Sezgin Bakırdere In this study, a new and efficient sample pretreatment method called as dispersive solid phase extraction (DSPE) was proposed for the extraction and preconcentration of cadmium from edible oil samples and combined with inductively coupled plasma-optical emission spectrometry (ICP OES) for analyte...
Mon, 05/17/2021 - 04:03
Bioglycosylation is an efficient strategy to improve biological activities and physicochemical properties of natural compounds to develop structural modifications of drugs. In this study, an N555 residue was identified as a candidate for site-directed mutagenesis through sequence alignment with GTF180ΔN. Caffeic acid phenethyl ester (CAPE) was used as an acceptor substrate. Two generated mutants...
Mon, 05/17/2021 - 00:00
Bacillus thuringiensis (Bt), a natural pathogen of different invertebrates, primarily insects, is widely used as a biological control agent. While Bt-based preparations are claimed to be safe for non-target organisms due to the immense host specificity of the bacterium, the growing evidence witnesses the distant consequences of their application for natural communities. For instance, upon...
Sun, 05/16/2021 - 06:08
Author(s): Shujie Wang, Qiao Li, Yanan Gao, Zhenlei Zhou, Zhen Li Elevating levels of environmental lead (Pb) results in serious hazards to health of animals and human beings. In this study, daily diet with three different levels of Pb (1, 10, and 100 mg/kg) were fed to ISA Brown layers. It showed that the kidney and liver have the relatively high Pb concentration (2.34 and 0.51 ppm) after...
Sat, 05/15/2021 - 14:05
This study estimates for the first time dietary acrylamide intake in Chile and conducts exposure risk assessments using the margin of exposure (MOE) method. A consumption frequency survey of starchy foods was carried out in the metropolitan region of Santiago, Chile on people from different socioeconomic levels aged between 12 and 65 years old. The acrylamide contents of the most frequently...
Sat, 05/15/2021 - 06:19
Author(s): Sib Sankar Giri, Min Jung Kim, Sang Guen Kim, Sang Wha Kim, Jeong Woo Kang, Jun Kwon, Sung Bin Lee, Won Joon Jung, Venkatachalam Sukumaran, Se Chang Park Curcumin exhibited numerous key activities including antioxidant, anti-inflammatory, and immunostimulatory effects in fish. This study evaluated the protective effects of curcumin (CUR) against lead (Pb)-induced toxicities in fish....
Fri, 05/14/2021 - 08:03
by Shruti Koulgi, Vinod Jani, Mallikarjunachari Uppuladinne V. N., Uddhavesh Sonavane, Rajendra Joshi Drug repurposing studies targeting inhibition of RNA dependent RNA polymerase (RdRP) of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) have exhibited the potential effect of small molecules. In the present work a detailed interaction study between the phytochemicals from Indian...
Fri, 05/14/2021 - 06:10
Author(s): Anna Marqueño, Elisabet Pérez-Albaladejo, Nancy D. Denslow, John A. Bowden, Cinta Porte Given the opposing responses reported for bisphenol A (BPA) in terms of induction of obesogenic effects and impaired lipid metabolism, the increasing use of bisphenol F (BPF), and the relatively low information available regarding the effects of bisphenol A bis(3-chloro-2- hydroxypropyl) ether (...

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