Chemical contaminants

Fri, 03/05/2021 - 08:03
by Elisa Napoli, Tina B. Bønsdorff, Ida Sofie Jorstad, Øyvind S. Bruland, Roy H. Larsen, Sara Westrøm Alpha-particle emitting radionuclides continue to be the subject of medical research because of their high energy and short range of action that facilitate effective cancer therapies. Radium-224 (224Ra) is one such candidate that has been considered for use in combating micrometastatic disease....
Fri, 03/05/2021 - 06:11
Author(s): Lin Chen, Peng Chen, Zhenhu Wang, Weifeng Liu, Duchao Zhang, Tianzu Yang Lead sulfate containing residue is a hazardous waste that should be treated cleanly and efficiently for environment protection and resource sustainability. In this work, a novel reduction-sulfurization process using a fluidized bed reactor was investigated for treating lead sulfate containing residue. The effects...
Fri, 03/05/2021 - 06:08
Author(s): Stuart Ben Mukiibi, Steven Allan Nyanzi, Justus Kwetegyeka, Chijioke Olisah, Adewale Matthew Taiwo, Edward Mubiru, Emmanuel Tebandeke, Henry Matovu, Silver Odongo, Juma John Moses Abayi, Emily Chelangat Ngeno, Mika Sillanpää, Patrick Ssebugere Honey has multifaceted nutritional and medicinal values; however, its quality is hinged on the floral origin of the nectar. Taking advantage of...
Fri, 03/05/2021 - 02:02
Phytoremediation is a green, simple, eco-friendly, sustainable, and cost-effective remediation technology to remove and degrade contaminants from soil. In this study, a germination experiment and a pot experiment were performed in greenhouse to evaluate cadmium toxicity and phytoremediation capacity. The results showed that there was the highest membership function value of cadmium (MFVC) in KFJT...
Thu, 03/04/2021 - 06:13
Author(s): Zijiao Yuan, Binbin He, Xiaoguo Wu, Staci L. Massey Simonich, Houqi Liu, Jiahui Fu, Afeng Chen, Hanyang Liu, Qing Wang In this study, urban stream sediment samples were collected in the Suzhou Industrial Park (SIP), one of the earliest national demonstration eco-industrial parks of China. PAHs were analyzed in these sediments, and concentrations of total PAHs were 180–81,000 ng g−1 (...
Wed, 03/03/2021 - 22:10
Journal of Separation Science, Accepted Article. The intensive application of pesticides to increase crop production has resulted in contamination of the agricultural products. Due to their occurrence at trace levels and the complexity of food samples, analysis of pesticide residues requires selective and efficient sample preparation methods. For this purpose, an extraction method based on...
Wed, 03/03/2021 - 06:09
Author(s): Gopalapura J. Vishalakshi, Mahadevappa Hemshekhar, Vaddaragudisalu D. Sandesha, Kunthurumole S. Prashanth, Swamy Jagadish, Manoj Paul, Kempaiah Kemparaju, Kesturu S. Girish Bisphenol AF, an analogue of Bisphenol A, is an important raw material used in the production of plastic and rubber substances like plastic bottles and containers, toys, and medical supplies. Increased contamination...
Wed, 03/03/2021 - 06:08
LWT
Author(s): İnci Cerit, Omca Demirkol The aim of this study was to examine the effects of thiol compounds, glutathione (GSH), cysteine (CYS) and N-acetylcysteine (NAC), on the color, antioxidant activity, total phenolic, ascorbic acid and acrylamide content of French fries which were fried at 180 °C for 6 min. Three different concentrations (0.5%, 1.0%, 2.0%) of each thiol compound were tested....
Wed, 03/03/2021 - 06:08
LWT
Author(s): Mengke Su, Qian Jiang, Jinhu Guo, Yuxin Zhu, Shuai Cheng, Ting Yu, Shanshan Du, Yifan Jiang, Honglin Liu Edible oil is easy to be polluted by polycyclic aromatic hydrocarbons (PAHs) in production, processing, storage and use. Rapid screening of oil quality and safety is a huge demand in food industry and government regulation. Usually, sample pretreatment is needed for PAHs detection...
Wed, 03/03/2021 - 04:02
Although the colorimetric methods can easily meet the demands of point-of-care and ease-of-use for antibiotic detection, they still face many challenges in the accuracy and stability of assay. Herein, a facile and stable colorimetric aptasensor is first developed for kanamycin residue detection based on the aptamer-enhanced peroxidase-mimicking activity of layered WS2 nanosheets. The...
Wed, 03/03/2021 - 02:03
Abstract Bioremediation of toxic metal ions using bacterial strains is a promising tool. Metal binding motifs in microbial proteins are involved in the regulation and transport of such toxic metals for metal detoxification. A bacterial strain designated TWSL_4 with metal (Cu, Cd, and Pb) resistance and removal ability was isolated and identified as a Bacillus megaterium strain using 16S rRNA...
Tue, 03/02/2021 - 22:11
Journal of Food Processing and Preservation, Accepted Article. In this study, the level of acrylamide (AAM) in Robusta coffee beans was analyzed in a hot air roaster, in which the temperature was increased from room temperature to 220 °C. Results showed that the maximum AAM level of 974 ± 29 μg/kg was achieved at 180 °C. Thereafter, AAM continuously decreased down to 109 ± 18 μg/kg. The...
Tue, 03/02/2021 - 04:02
Development of simple, sensitive, and reliable fluorescence sensors for monitoring the residue, distribution, and variation of organophosphorus pesticides (OPs) in agricultural crops is highly urgent but remains challenging, which is ascribed to deprivation of an ideal fluorophore and ingenious detection strategy. Herein, we report the fabrication of cadmium telluride quantum dots (CdTe QDs) with...
Tue, 03/02/2021 - 04:02
Nowadays, a lot of pesticides have been used in the agriculture field due to the global demand for food production. Carbofuran (CF) is the most commonly used carbamate compound that is responsible for the highest toxicity to humans compared to any other pesticide used in agricultural settings. Thus, rapid, portable, and low-cost sensors are needed for the detection of CF in the environment and...
Tue, 03/02/2021 - 04:02
Pesticide residues are a food safety concern. A good detection method is critical for rapid and accurate determination of pesticide metabolites in crops and studying metabolism. The pretreatment methods have mainly been ultrasonic extraction–solid-phase extraction and QuEChERS, while detection methods have been radio-chromatography, nuclear magnetic resonance, and mass spectrometry. This...
Tue, 03/02/2021 - 02:02
Norovirus contamination of oysters is the lead cause of non-bacterial gastroenteritis and a significant food safety concern for the oyster industry. Here, norovirus reduction from Pacific oysters (Crassostrea gigas), contaminated in the marine environment, was studied in laboratory depuration trials and in two commercial settings. Norovirus concentrations were measured in oyster digestive tissue...
Mon, 03/01/2021 - 16:00
Coastal areas impacted by high anthropogenic pressures typically display sediment contamination by polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs). Microbial-based bioremediation represents a promising strategy for sediment reclamation, yet it frequently fails due to poor knowledge of the diversity and dynamics of the autochthonous microbial assemblages and to the inhibition of the...
Mon, 03/01/2021 - 08:02
Transcatheter embolization is an important treatment method in clinical therapy, and vascular embolization material plays a key role in embolization. The temperature-sensitive p(N-isopropylacrylamide-co-butyl methylacrylate) (PIB) nanogel is a novel embolic agent. To evaluate the feasibility of the nanogel as a blood vessel embolization agent, we aimed to assess the effect of embolization with...
Mon, 03/01/2021 - 06:09
Author(s): Mehmet Fatih Cengiz, Onur Basançelebi, Mehmet Başlar, Muharrem Certel In this study, effects of low-intensity electrical currents (200, 800 and 1400 mA), ultrasound frequencies (24 and 40 kHz) and their combinations were applied at the duration period of 2, 4, 6, 8, and 10 minutes for the degradation of captan, thiamethoxam and metalaxyl residues in lettuce samples. Residues of the...
Mon, 03/01/2021 - 06:09
Author(s): Jin Liu, Jinglan Liao, Chenyun Zhang, Lingfeng Zeng, Chaowei Zong, Yake Lv, Jingwen Li, Wenchang Zhang Cadmium (Cd) is known to affect ovarian granulosa cells (GCs), but no information on the transgenerational effects of Cd on GCs. In this study, pregnant Sprague-Dawley (SD) rats were orally dosed with Cd from gestation day 1 until birth. F1 or F2 female rats were mated with untreated...
Mon, 03/01/2021 - 02:02
Abstract Background and aims Rice accumulates higher levels of cadmium (Cd) in grain than other cereals, and hybrid rice varieties cover around half of the total rice area in China. Therefore, understanding the phenotypic and genetic characteristics of Cd accumulation in rice hybrids is vital for food safety. Methods An incomplete diallel cross design was used to analyse the heritability and...
Sun, 02/28/2021 - 06:08
LWT
Author(s): Amal S. Albedwawi, Mark S. Turner, Amin N. Olaimat, Tareq M. Osaili, Anas A. Al-Nabulsi, Shao-Quan Liu, Nagendra P. Shah, Mutamed M. Ayyash The European Food Safety Authority and World Health Organization have been screening foods for acrylamide contamination and have published various guidelines to educate industries about mitigation strategies. There are several approaches to reduce...
Sun, 02/28/2021 - 02:02
Petroleum hydrocarbons have been worldwide concern contaminants because of their mutagenicity and carcinogenicity. The potential biodegradation of petroleum hydrocarbons at low temperatures is important for petroleum contamination remediation in cold region. In this study, a mixed cold-adapted bacteria flora JY, including seven petroleum-degrading strains (B1, H1, H2, H3, R1, R2, and S), was...
Sat, 02/27/2021 - 12:00
There has been limited toxicity testing of cigarillos, including comparison to cigarettes. This study compared the smoke chemistry and the cytotoxic and genotoxic potential of 10 conventional cigarettes and 10 cigarillos based on the greatest market share. Whole smoke and total particulate matter (TPM) were generated using the Canadian Intense and International Organization for Standardization...
Sat, 02/27/2021 - 12:00
Hydroxylated chalcones are phytochemicals which are biosynthetic precursors of flavonoids and their 1,3-diaryl-prop-2-en-1-one structure is used as a scaffold for drug development. In this study, the structure-dependent activation of aryl hydrocarbon receptor (AhR)-responsive CYP1A1, CYP1B1, and UGT1A1 genes was investigated in Caco2 colon cancer cells and in non-transformed young adult mouse...
Sat, 02/27/2021 - 12:00
Epidemiological and experimental studies have associated oral and systemic exposures to the herbicide paraquat (PQ) with Parkinson’s disease. Despite recognition that airborne particles and solutes can be directly translocated to the brain via olfactory neurons, the potential for inhaled PQ to cause olfactory impairment has not been investigated. This study sought to determine if prolonged low-...
Sat, 02/27/2021 - 12:00
The biological half-life (t1/2) of methylmercury (MeHg) shows considerable individual variability (t1/2 < 30 to > 120 days), highlighting the importance of mechanisms controlling MeHg metabolism and elimination. Building on a prior physiologically based pharmacokinetic (PBPK) model, we elucidate parameters that have the greatest influence on variability of MeHg t1/2 in the human body....
Sat, 02/27/2021 - 10:04
The bacterial hydrolytic dehalogenation of 4-chlorobenzoate (4CBA) is a coenzyme A (CoA)-activation-type catabolic pathway that is usually a common part of the microbial mineralization of chlorinated aromatic compounds. Previous studies have shown that the transport and dehalogenation genes for 4CBA are typically clustered as an fcbBAT1T2T3C operon and inducibly expressed in response to 4CBA....
Sat, 02/27/2021 - 10:03
Enzymatic depolymerization of seaweed polysaccharides is gaining interest for the production of functional oligosaccharides and fermentable sugars. Herein, we describe a thermostable alginate lyase that belongs to polysaccharide lyase family 17 (PL17) and was derived from an Arctic Mid-Ocean Ridge (AMOR) metagenomics data set. This enzyme, AMOR_PL17A, is a thermostable exolytic oligoalginate...
Sat, 02/27/2021 - 10:03
Rieske nonheme iron oxygenases (ROs) catalyze the oxidation of a wide variety of substrates and play important roles in aromatic compound degradation and polycyclic aromatic hydrocarbon degradation. Those Rieske dioxygenases that usually act on hydrophobic substrates have been extensively studied and structurally characterized. Here, we report the crystal structure of a novel Rieske monooxygenase...
Sat, 02/27/2021 - 08:04
by Ahmad Salimi, Elahe Baghal, Hassan Ghobadi, Niloufar Hashemidanesh, Farzad Khodaparast, Enayatollah Seydi Acrylamide (AA), is an important contaminant formed during food processing under high temperature. Due to its potential neurotoxicity, reproductive toxicity, hepatotoxicity, immunotoxicity, genotoxicity and carcinogenicity effects, this food contaminant has been recognized as a human...
Sat, 02/27/2021 - 02:02
Abstract Loggerhead sea turtle (C. caretta) is the official European bioindicator of marine litter in the Mediterranean Sea. In 2019, 8 sea turtles, out of 28 specimens loggerhead on the Adriatic coast of Molise, were subjected to necropsy. The intestinal contents were collected and the microplastics until 0.45 μm were extracted. Qualitative and quantitative assessments were performed by...
Fri, 02/26/2021 - 16:00
Maize is one of the most important crops worldwide and is the number one arable crop in Portugal. A transition from the conventional farming system to organic agriculture requires optimization of cultivars and management, the interaction of plant–soil rhizosphere microbiota being pivotal. The objectives of this study were to unravel the effect of population genotype and farming system on...
Fri, 02/26/2021 - 08:02
by Niladri S. Kar, Daniel Ferguson, Nianli Zhang, Erik I. Waldorff, James T. Ryaby, Joseph A. DiDonato Pulsed-electromagnetic-field (PEMF) treatment was found to enhance cellular differentiation of the mouse preosteoblast, MC3T3-E1, to a more osteoblastic phenotype. Differentiation genes such as Alp, BSPI, cFos, Ibsp, Osteocalcin, Pthr1 and Runx2 showed increased expression in response to PEMF...
Fri, 02/26/2021 - 08:02
by Hyungryul Lim, Yong-Han Lee, Sanghyuk Bae, Do-Hyun Koh, Mira Yoon, Bo-Eun Lee, Jeong-Soo Kim, Ho-Jang Kwon Objectives In Jang-jeom, a small village in Hamra-myeon, Iksan-si, Jeollabuk-do, South Korea, residents raised concerns about a suspected cancer cluster that they attributed to a fertilizer plant near the village. We aimed to investigate whether the cancer incidence in the village was...
Fri, 02/26/2021 - 08:02
by Alexis Nzila, Musa M. Musa, Saravanan Sankara, Marwan Al-Momani, Lei Xiang, Qing X. Li The exploitation of petroleum oil generates a considerable amount of “produced water or petroleum waste effluent (PWE)” that is contaminated with polycyclic aromatic hydrocarbons (PAHs), including Benzo[a]pyrene (BaP). PWE is characterised by its high salinity, which can be as high as 30% NaCl, thus the...
Fri, 02/26/2021 - 06:09
Author(s): Yawen Rong, Shujat Ali, Qin Ouyang, Li Wang, Bing Wang, Quansheng Chen This study describes a turn-on upconversion fluorescence sensor for the detection of acrylamide (AA) based on glutathione (GSH) modulated turn-on fluorescence strategy. Polyethyleneimine-modified upconversion nanoparticles were first prepared by the hydrothermal method and then Rhodamine B derivative (RBD) was...
Fri, 02/26/2021 - 06:08
Author(s): Lukman K. Akinola, Adamu Uzairu, Gideon A. Shallangwa, Stephen E. Abechi Production of polychlorinated biphenyls (PCBs) was banned a long time ago because of their harmful health effects but humans continue to be exposed to residual PCBs in the environment. In this study, the susceptibility of human nuclear receptors to binding by PCBs was investigated using molecular docking...
Thu, 02/25/2021 - 22:10
Journal of Separation Science, Accepted Article. A moisture‐sensitive metal‐organic framework CoII(pybz)2·2DMF was synthesized and applied as the adsorbent of dispersive solid phase extraction. The structure changed after water treatment due to the fact that two chelate carboxylate groups on the skeleton were transformed to monodentate because of the coordination of water molecules. The material...
Thu, 02/25/2021 - 16:00
Vitamin A deficiency remains a common public health problem among the rice-dependent poor people in the developing countries of Asia. Conventional milled rice does not contain provitamin A (β-carotene) in is edible part (endosperm) and is also deficient in essential minerals, such as iron and zinc. Transgenic Golden Rice event GR2E, which produces β-carotene in its endosperm, was used as a parent...
Thu, 02/25/2021 - 16:00
Dalbavancin, vancomycin and chlorobiphenyl-vancomycin share a high degree of structural similarity and the same primary mode of drug action. All inhibit bacterial cell wall biosynthesis through complexation with intermediates in peptidoglycan biosynthesis mediated via interaction with peptidyl-d-alanyl–d-alanine (d-Ala–d-Ala) residues present at the termini of the intermediates. VanB-type...
Thu, 02/25/2021 - 06:14
Author(s): Jin Chen, Pan Jin, Shimin Huang, Yeshan Guo, Fengxiao Tan, Jianwu Wang, Yinghua Shu We executed a pot experiment to examine the differences of absorption, chemical forms, subcellular distribution, and toxicity of Cd between two cultivars of Chinese flowering cabbage Brassica campestris [Lvbao701 (low-Cd cultivar) and Chicaixin No.4 (high-Cd cultivar)]. Compared to Chicaixin No.4, the...
Thu, 02/25/2021 - 06:13
Author(s): Fengsong Zhang, Guixiang Zhang, Xiaoyong Liao Biochars were studied for their impacts on the dissipation and vegetable uptake of polycyclic aromatic hydrocarbons (PAHs) in an agricultural soil. The health risks of PAHs taken up by vegetables were assessed by growing Chinese cabbage in both unamended soil and biochar-amended soils. In the unamended soil, the total 16 PAHs (Σ16PAHs)...
Thu, 02/25/2021 - 02:02
Stormwater harvesting and reuse is an attractive option to lower the demand placed on other sources of water supply. However, it contains a wide range of pollutants that need to be removed before it can be reused or even discharged to the waterways and receiving waters. An experimental protocol to estimate the efficiency of a soil-based-filter medium for the treatment of stormwater pollutants...
Wed, 02/24/2021 - 10:03
ABSTRACT Most antimicrobials currently in the clinical pipeline are modifications of existing classes of antibiotics and are considered short-term solutions due to the emergence of resistance. Pseudomonas aeruginosa represents a major challenge for new antimicrobial drug discovery due to its versatile lifestyle, ability to develop resistance to most antibiotic classes, and capacity to form robust...
Wed, 02/24/2021 - 10:03
ABSTRACT Antibiotic-resistant bacteria rapidly spread in clinical and natural environments and challenge our modern lifestyle. A major component of defense against antibiotics in Gram-negative bacteria is a drug permeation barrier created by active efflux across the outer membrane. We identified molecular determinants defining the propensity of small peptidomimetic molecules to avoid and inhibit...
Wed, 02/24/2021 - 10:03
ABSTRACT Nucleoside analogs are mainstays of antiviral therapy. Although resistance to these drugs hinders their use, understanding resistance can illuminate mechanisms of the drugs and their targets. Certain nucleoside analogs, such as ganciclovir (GCV), a leading therapy for human cytomegalovirus (HCMV), contain the equivalent of a 3'-hydoxyl moiety, yet their triphosphates can terminate genome...
Wed, 02/24/2021 - 06:09
Author(s): Emel Oz The formations of polycyclic aromatic hydrocarbons (PAHs) and heterocyclic aromatic amines (HAAs) in barbecued meatballs formulated with different animal fats [beef intermuscular and/or sheep tail (ST)] were investigated. Meatballs were also analyzed in terms of some qualitative and quantitative properties. From perspective of nutrition, meatballs formulated with ST fat at...
Wed, 02/24/2021 - 00:00
Bisphenol S (BPS) is used as an alternative plasticizer to Bisphenol A (BPA), despite limited knowledge of potential adverse effects. BPA exhibits endocrine disrupting effects during development. This article focuses on the impact of bisphenols during oocyte maturation. Connexins (Cx) are gap junctional proteins that may be affected by bisphenols, providing insight into their mechanism during...
Tue, 02/23/2021 - 08:03
To overcome the severe toxicity and blind absorption zone of conventional lead-based shielding materials for X-rays in the 70–90 keV range, the lead-free multilayered polymer composites were designed and fabricated. The effects of the direction of incidence of the X-rays and number of layers as well as layer thickness ratio of the (tungsten/ethylene-octene copolymer)/(bismuth/ethylene-octene...

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