Chemical contaminants

Fri, 02/19/2021 - 02:04
Cadmium (Cd) in soil–plant system can abridge plant growth by initiating alterations in root zones. Hydroponics and rhizoboxes are useful techniques to monitor plant responses against various natural and/or induced metal stresses. However, soil based studies are considered more appropriate in order to devise efficient food safety and remediation strategies. The present research evaluated the Cd-...
Fri, 02/19/2021 - 02:03
Jumping ability determines the likelihood of survival and reproduction of amphibians. To study the toxic effect of lead (Pb) on the jumping ability of amphibians, Pelophylax nigromaculata were treated with 0, 1 and 10 mg/L Pb for 10 days and 20 days each. The results showed that for both treatment time (10 days and 20 days), compared to the control group, the 1 mg/L Pb treatment had no...
Thu, 02/18/2021 - 16:00
New anti-infective approaches are urgently needed to control multidrug-resistant (MDR) pathogens, such as methicillin-resistant Staphylococcus aureus (MRSA). Sortase A (SrtA) is a membrane-bound cysteine transpeptidase that plays an essential role in the catalysis of covalent anchoring of surface proteins to the cell wall of Staphylococcus aureus (S. aureus). The present study reports...
Thu, 02/18/2021 - 10:02
Zinc is an essential micronutrient for mycobacteria, and its depletion induces multiple adaptive changes in cellular physiology, the most remarkable of which are remodeling and hibernation of ribosomes. Ribosome remodeling, induced upon relatively moderate depletion of zinc, involves replacement of multiple ribosomal proteins containing the zinc-binding CXXC motif (called C+ r proteins) by their...
Thu, 02/18/2021 - 10:02
Schistosomiasis poses a serious threat to human health and remains a major tropical and parasitic disease in more than 70 countries. Praziquantel (PZQ) has been the primary treatment for schistosomiasis for nearly 4 decades. However, its efficacy against migratory-stage schistosomula is limited. Radicicol (RAD), a β-resorcylic acid lactone derived from Paecilomyces sp. strain SC0924, was...
Thu, 02/18/2021 - 06:29
Author(s): Ziyang Luo, Hanying Duan, Yuncheng Yang, Wentao Zhang, Hosahalli S. Ramaswamy, Weibin Bai, Chao Wang Cadmium (Cd) ranks seventh in the World Health Organization (WHO) priority list of hazardous toxic substances. In this study, a high-pressure extraction (HPE) method was explored for Cd decontamination in rice, and the process was compared with the traditional washing method. Optimal...
Thu, 02/18/2021 - 06:26
Author(s): Lucas Suchecki Barnet, Dirce Pozebon, Valderi L. Dressler, Daiane Cioato A methodology for As speciation in rice using liquid chromatography-inductively coupled plasma mass spectrometry (LC-ICP-MS) was optimised and validated. Chromatographic separation and elution of As(III), DMA(V) (dimethylarsenic acid), MMA(V) (monomethylarsenic acid) and As(V) were achieved in less than 8 min...
Thu, 02/18/2021 - 04:02
Effective strategies are needed to deal with invasive fungal infections caused by drug-resistant fungi. Previously, we designed a series of antifungal benzocyclane derivatives based on the drug repurposing of haloperidol. Herein, further structural optimization and antifungal mechanism studies were performed, leading to the discovery of new piperidol derivative B2 with improved synergistic...
Thu, 02/18/2021 - 02:02
Cadmium (Cd) is considered one of the heavy metals disturbing plant biophysiological functions. The potential role of phosphorus (P) nutrition in the attenuation of Cd effects on photosynthetic efficiency, plant growth, and cadmium uptake has been investigated in hydroponically grown tomato. Two P nutrition regimes (P15: 15 mg l-1; P30: 30 mg l-1) were assessed in the presence or absence of Cd (...
Thu, 02/18/2021 - 02:02
Removal of polycyclic aromatic hydrocarbons (PAHs) from wastewater treatment sludge with appropriate technologies is of great importance for nature and public health. UV technology is one of the most frequently used methods for the removal of PAHs. While various photodegradation applications with UV-C (ultraviolet-C) light and photocatalysts can be performed to remove these compounds, a large...
Wed, 02/17/2021 - 06:10
Author(s): Hongyan Xu, Minggang Zheng, Ling Wang, Wucai Zhao, Yi Hua, Lidan Fang, Aifeng Liu, Zongshan Zhao Tetrabromobisphenol A (TBBPA), halogenated carbazole (HCZ), and their analogs are the emerging pollutants invading the marine environment. So far, a few methods have been reported for the simultaneous analysis of these pollutants due to their large polarity difference. In this study, an...
Tue, 02/16/2021 - 06:24
Author(s): Yuanyuan Fang, Lili Lu, Yuan Liang, Dongjie Peng, Michael Aschner, Yueming Jiang Lead is a heavy metal pollutant that is widely present in the environment. It affects every organ system, yet the nervous system appears to be the most sensitive and primary target. Although many countries have made significant strides in controlling Pb pollution, Pb poisoning continuous to be a major...
Tue, 02/16/2021 - 02:03
In recent years Melamine is upgraded as a type three carcinogen. It is a sorry fact that still; people are in the fantasy mode and abaft the melamine tableware as they are a good piece of decorative material which sets dining an opulent look. The present study focuses on the determination of melamine leaching from melamine tablewares. The food stimulants culled for this study are conventional...
Tue, 02/16/2021 - 02:03
An arginine–glucose mixture (1:2 mol ratio) with pH 9 was heated at 53–100 °C for 10–350 min, and the effects of process parameters were determined during the Maillard reaction (MR). The heating temperature and time were selected as process conditions and were studied with central composite design. The model system was tested based on the values obtained from antioxidant capacity, browning...
Tue, 02/16/2021 - 02:03
The furan levels in commercial coffee product samples (17 instant coffees, 12 mixed coffee, 8 canned coffee) were 49–2155, 10–201 and 15–209 ng/g, respectively. Since thermal degradation/rearrangement of carbohydrates is the main source of furan, the concentrations of furan and monosaccharides (mannose, rhamnose, glucose, galactose and arabinose) were analysed in 26 green and roasted coffee bean...
Tue, 02/16/2021 - 02:03
Air samples were collected around industrial parks in Jiangsu, China, to allow the concentrations, profiles, and risk assessment of polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs), polychlorinated naphthalenes (PCNs), and metals to be investigated. The concentrations of ΣPBDD/Fs and ΣPCNs were 1324.26–2080.98 fg/m3 (11.35–42.57 fg I-TEQ/m3) and 10,404.9–29,322.9 fg/m3 (1.32–7.19 fg I...
Mon, 02/15/2021 - 06:11
Author(s): Jingzeng Cai, Haoyue Guan, Xing Jiao, Jie Yang, Xiaoming Chen, Haoran Zhang, Yingying Zheng, Yue Zhu, Qi Liu, Ziwei Zhang Cadmium (Cd) chloride, as widely distributed toxic environmental pollutants by using in industry, severely imperils animal and human health. Pyroptosis is a Cas1-dependent pro-inflammatory programmed cell death and involves in various types of diseases. Nevertheless...
Mon, 02/15/2021 - 02:03
This study provides data on the characteristic levels, spatial patterns, sources, and risk of n-alkanes (AHs) [octane, n-C8, to tetracontane, n-C40] and polycyclic aromatic hydrocarbons (PAHs) in surficial sediments from the Escravos River Basin (ERB), Nigeria. The n-alkane and PAH concentrations in sediments were quantified by chromatographic methods. The concentrations of AHs and PAHs in the...
Sun, 02/14/2021 - 06:10
Author(s): Ru Chen, Xiaomin Xue, Guiping Wang, Jinzheng Wang The presence of pesticide residues in apples raises serious health concerns. In this study, a novel, sensitive, high-performance method was developed to simultaneously analyze the residues of 14 pesticides in apples using modified QuEChERS sample pretreatment coupled with ultra-performance liquid chromatography-tandem mass spectrometry...
Sat, 02/13/2021 - 22:28
Seafood is capable of bioaccumulating heavy metals (HM), making it a potentially major dietary source of HM for humans. Presently, little data exists on seafood from the eastern‐most boundary of the Mediterranean Sea. This study aims to provide exposure insight of the Israeli population to HM through the consumption of locally caught seafood by assessing the levels of arsenic, mercury, cadmium,...
Sat, 02/13/2021 - 06:24
Author(s): Chaoyue Yang, Bo Nan, Haiqing Ye, Haiyang Yan, Minghua Wang, Yuan Yuan Acrylamide (AA), an important by-product of the Maillard reaction, has been reported to be genotoxic and carcinogenic. The present study employed miRNAs to investigate the toxic mechanism of AA and their role against AA toxicity. Deep sequencing of small RNA libraries was performed and miR-193b-5p was applied for...
Sat, 02/13/2021 - 06:24
Author(s): Yumi Abiko, Yusuke Katayama, Masahiro Akiyama, Yoshito Kumagai Garlic (Allium sativum L.) contains numerous sulfur compounds. We have previously found that reactive sulfur species such as glutathione persulfide, glutathione polysulfide, protein-bound persulfides, and hydrogen sulfide can bind to methylmercury to give bismethylmercury sulfide, which is less toxic than methylmercury. It...
Sat, 02/13/2021 - 04:02
In this study, a rapid and reliable method based on ultrahigh-performance liquid chromatography coupled with Q Exactive HF-X mass spectrometry (UHPLC-QE/MS) was established for the simultaneous quantification and validation of acrylamide, 5-hydroxymethylfurfural, and 14 heterocyclic aromatic amines in thermally processed foods. With the optimization of the pretreatment method, all 16 hazardous...
Sat, 02/13/2021 - 04:02
Two proteases produced by the SARS-CoV-2 virus, the main protease and papain-like protease, are essential for viral replication and have become the focus of drug development programs for treatment of COVID-19. We screened a highly focused library of compounds containing covalent warheads designed to target cysteine proteases to identify new lead scaffolds for both Mpro and PLpro proteases. These...
Sat, 02/13/2021 - 02:03
Atmospheric deposition of cadmium (Cd) and lead (Pb) was investigated together with the accumulation, distribution and health risks from potentially toxic metals in soils, vegetables and human hair at a mining area in southwest China. Annual atmospheric deposition of Cd and Pb were 41.1 and 192 g ha− 1, respectively, and consisted mainly of dry deposition. Agricultural soils experienced high...
Sat, 02/13/2021 - 02:02
Polycyclic aromatic hydrocarbons (PAHs) are among the most hazardous organic pollutants due to their toxic, carcinogenic, mutagenic properties, wide distribution, recalcitrance and stability in the environment. The study objective is to determine the impact of the species composition of tree stands on PAH accumulation in urban forest soils of Krakow. The study compared the impact of deciduous and...
Fri, 02/12/2021 - 04:02
The metabolism of chlorogenic acid (CGA) through the intestinal tract was studied. As cadmium is a well-known toxic heavy metal, this study was carried out to investigate the comparative protective effect of CGA and its representative intestinal metabolite (3-(3-hydroxyphenyl) propionic acid, HPPA) against Cd-induced erythrocyte cytotoxicity in vitro and in vivo. We found that CGA and its...
Fri, 02/12/2021 - 02:02
Acrylamide is an amide-type organic compound formed by the reaction of asparagine with reducing sugars (Maillard reaction) and is classified as a probable human carcinogen (Group 2A) by the International Agency for Research on Cancer. Potato chips are one of the foods that contribute most to dietary acrylamide intake, and despite a significant reduction in recent years thanks to changes in frying...
Fri, 02/12/2021 - 00:00
Bisphenol A (BPA) is a xenoestrogen chemical commonly used to manufacture polycarbonate plastics and epoxy resin and might affect various human organs. However, the cellular effects of BPA on the eyes have not been widely investigated. This study aimed to investigate the cellular cytotoxicity by BPA exposure on human retinoblastoma cells. BPA did not show cytotoxic effects, such as apoptosis,...
Thu, 02/11/2021 - 22:11
Environment and food contamination with cadmium (Cd) can cause serious toxicity, posing a severe threat to agricultural production and human health. However, how amino acids contribute to defenses against oxidative stress caused by Cd in cells is not fully understood. As a model eukaryote with a relatively clear genetic background, Saccharomyces cerevisiae has been commonly used in Cd toxicity...
Thu, 02/11/2021 - 22:09
Previous studies have demonstrated the acrylamide‐removing properties of probiotic monocultures; however, potential advantages of consortia over monocultures to reduce the dietary exposure to acrylamide have not been proven. Hence this work aims to assess the acrylamide (AA)‐binding properties of bacterial consortia, consisting of either probiotic strains and/or representative bacteria of...
Thu, 02/11/2021 - 10:03
ABSTRACT Pleiotropic drug resistance (PDR) ATP-binding cassette (ABC) transporters of the ABCG family are eukaryotic membrane proteins that pump an array of compounds across organelle and cell membranes. Overexpression of the archetype fungal PDR transporter Cdr1 is a major cause of azole antifungal drug resistance in Candida albicans, a significant fungal pathogen that can cause life-threatening...
Thu, 02/11/2021 - 08:07
by Chunjiang Yang, Aobo Chen, Yashuo Chen The COVID-19 pandemic has unhinged the lives of people across the globe. In particular, more than 30 million Chinese college students are home-schooling, yet there is little understanding of how academic workload, separation from school, and fears of contagion lead to a decrease in their health. This study examined the relationships between Chinese...
Thu, 02/11/2021 - 06:21
Author(s): Coline Monchanin, Amaury Blanc-Brude, Erwann Drujont, Mohammed Mustafa Negahi, Cristian Pasquaretta, Jérôme Silvestre, David Baqué, Arnaud Elger, Andrew B. Barron, Jean-Marc Devaud, Mathieu Lihoreau Pollutants can have severe detrimental effects on insects, even at sublethal doses, damaging developmental and cognitive processes involved in crucial behaviours. Agrochemicals have been...
Thu, 02/11/2021 - 06:20
Author(s): Si-Fu Tang, Xiaomin Hou As primary polymer material in industrial products, bisphenol A (BPA) has become one of the most productive chemicals. Excluding its endocrine-disrupting property, BPA can also produce excessive reactive oxygen species (ROS). Nevertheless, the underlying toxic mechanisms of BPA-induced oxidative damages to plants are still unknown. In this work, glutathione S-...
Thu, 02/11/2021 - 06:20
Author(s): Yongqiang You, Li Wang, Chang Ju, Gen Wang, Fang Ma, Yujiao Wang, Dongguang Yang Arbuscular mycorrhizal fungi (AMF) play an important role in improving plant tolerance and accumulation of zinc (Zn) and cadmium (Cd). The growth, physiology and absorption of elements and transport in Phragmites australis (P. australis) were investigated under Zn and Cd stress to identify the transport...
Thu, 02/11/2021 - 06:20
Author(s): Yaping Li, Mingjie Sun, Wei He, Hui Wang, Hong Pan, Quangang Yang, Yanhong Lou, Yuping Zhuge Cadmium is a common heavy metal pollutant. In some plants, its absorption is inhibited by exogenous phosphorus. Here, the effect of P supplementation on the growth of tall fescue exposed to Cd was evaluated in a hydroponic culture experiment. Plants were exposed to five concentrations of P (0,...
Wed, 02/10/2021 - 10:03
ABSTRACT The global spread of antibiotic-resistant bacteria and their resistance genes is a critical issue that is no longer restricted to hospital settings, but also represents a growing problem involving environmental and food safety. In this study, we have performed a microbiological and genomic investigation of critical priority pathogens resistant to broad-spectrum cephalosporins and showing...
Wed, 02/10/2021 - 08:02
by Xiaohui Liu, Keitaro Suyama, Takeru Nose, Miki Shimohigashi, Yasuyuki Shimohigashi We reported that bisphenol AF (BPAF) works as an agonist for estrogen receptor (ER) ERα but as an antagonist for ERβ. Similar results were observed for bisphenol E analogs (BPE-X) such as BPE-F, BPE-Cl, and BPE-Br, each consisting of a series of a tri-halogenated methyl group CX3 in the central alkyl moiety. It...
Wed, 02/10/2021 - 08:02
by Roger Pamphlett, Philip A. Doble, David P. Bishop Objective Mercury and other toxic metals have been suggested to be involved in thyroid disorders, but the distribution and prevalence of mercury in the human thyroid gland is not known. We therefore used two elemental bio-imaging techniques to look at the distribution of mercury and other toxic metals in the thyroid glands of people over a wide...
Wed, 02/10/2021 - 04:02
In this work, a stable isotope dilution ultrahigh-performance liquid chromatography triple quadrupole tandem mass spectrometry (UHPLC–QqQ-MS/MS) method was developed and validated for simultaneous determination of Nε-(carboxymethyl)lysine (CML), Nε-(carboxyethyl)lysine (CEL), and acrylamide (AA) in baked and fried foods. Ground food samples were extracted with acetone followed by two parallel...
Wed, 02/10/2021 - 02:04
Abstract Pollution with the heavy metal cadmium (Cd2+) is a global problem. Cadmium adversely affects living organisms, highlighting the need to develop new methods for removal of this pollutant from the environment. In this study, we used a novel biomaterial based on calcium-crosslinked alginate-encapsulated bacteria to precipitate Cd2+ in polluted water. Our results show that calcium-...
Wed, 02/10/2021 - 02:04
Accumulation and transfer of Cd by Sonchus asper intercropped with a legume crop, Vicia faba were determined via 112Cd as a tracer to assess the potential of Sonchus asper as a hyperaccumulator. In this study, Sonchus asper and Vicia faba were planted side by side in soils amended with arbuscular mycorrhizae, and 112Cd was applied to either Sonchus asper or Vicia faba planted soils while the...
Wed, 02/10/2021 - 02:03
Abstract Biochar produced from different raw materials by pyrolysis have been utilized as an alternative material for organic compound adsorption. This study aims to evaluate the use of biochar generated from sugar cane filter cake, after pyrolysis treatment at 380 °C, in the adsorption process of thiamethoxam pesticide in wastewater. The biochar was studied based on moisture, volatile matter,...
Tue, 02/09/2021 - 22:09
Polycyclic aromatic hydrocarbons (PAHs) are generated by the incomplete combustion of carbon. Exposures correlate with systemic immune dysfunction and overall immune suppression. Real‐world exposures to PAHs are almost always encountered as mixtures; however, research overwhelmingly centers on isolated exposures to a single PAH, benzo[a]pyrene (B[a]P). Here, a human monocyte line (U937) was...
Tue, 02/09/2021 - 18:02
In this study, the level of arsenic (As), lead (Pb) and cadmium (Cd) and also essential elements in beer samples consumed in Turkey were investigated using the inductively coupled plasma mass spectrometry (ICP-MS) method. The heavy metal-induced non-carcinogenic and carcinogenic risks were calculated. For essential elements, the calculated estimated daily intake of iron (Fe), copper (Cu),...
Tue, 02/09/2021 - 08:07
The ultrafast polarization response to incident light and ensuing exciton/carrier generation are essential to outstanding optoelectronic properties of lead halide perovskites (LHPs). A large number of mechanistic studies in the LHP field to date have focused on contributions to polarizability from organic cations and the highly polarizable inorganic lattice. For...
Tue, 02/09/2021 - 02:03
Abstract Serpentine has weak immobilization capacity for Pb(II), especially under acidic conditions. In order to improve its application potential, a new biological modification method was adopted, i.e., the serpentine powder was weathered by Aspergillus niger and the fungus-serpentine aggregation (FSA) formed was investigated for its Pb(II) immobilization potential and underlying mechanism....
Tue, 02/09/2021 - 02:03
We investigated cadmium (Cd) accumulation in muscles, gills and hepatopancreas of Litopenaeus vannamei following 48 h exposure to 5.25 mg/L, and depuration of Cd in these tissues on 1, 5 and 15 d post exposure. We also detected the expressions of metallothionein (MT), caspase-3 and p53 in hepatopancreas of shrimp exposed to 0, 5.25 and 10.5 mg/L Cd (the 24 h median lethal concentration, 24 h LC50...
Mon, 02/08/2021 - 22:09
Variability of pesticide residues in food item plays a key role for the evaluation of consumer food safety. However, variability factors (VFs) derived from the large size fruit crops are still scarce. Therefore, the present work was aimed to quantify pesticide residues and to estimate VFs in large size fruit crops of mango and guava.

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