Chemical contaminants

Sun, 07/12/2020 - 06:12
Author(s): Antonio Garballo-Rubio, Jorge Soto-Chinchilla, Laura Martín-Pozo, Alberto Zafra-Gómez A gas chromatography-tandem mass spectrometry sensitive and selective method based on a combination of QuEChERS and subsequent molecularly imprinted polymer (MIP) technology was validated for the analysis of polycyclic aromatic hydrocarbons in complex dry extracts of Eleutherococcus senticosus, Salvia...
Sun, 07/12/2020 - 06:11
Author(s): Urmi Mukherjee, Anwesha Samanta, Subhasri Biswas, Sriparna Das, Soumyajyoti Ghosh, Dipak Kumar Mandal, Sudipta Maitra Bisphenol A (BPA), a weak estrogenic endocrine disruptor and a well-known plasticizer, has the potential to perturb diverse physiological functions; however, its impact on immune and metabolic function in aquatic vertebrates is relatively less understood. The present...
Sun, 07/12/2020 - 06:11
Author(s): Wenmin Huang, Quan Jin, Liyan Yin, Wei Li The effects of cadmium (Cd) have been investigated in an aquatic plant Ottelia alismoides grown under low CO2. Under low CO2, no Cd treated O. alismoides operated three carbon dioxide-concentrating mechanisms (CCMs) efficiently, including HCO3− acquisition, C4 and CAM photosynthesis. After 4 days of treatment with 200 μM and 2000 μM Cd, O....
Sun, 07/12/2020 - 04:01
Lignin is the most abundant aromatic biopolymer in nature and is a major byproduct from the paper industry. The unlocking of lignin’s potential for high-value applications has gained increasing attention in recent years. In this study, alkali lignin (AL), with a rigid conjugated structure and amphiphilic property, was used as a sustainable and eco-friendly encapsulation material for the...
Sat, 07/11/2020 - 22:12
An understanding of polychlorinated biphenyl (PCB) congener‐specific effects on cell membrane and intercellular communication is important within the studies of PCB absorption, organ‐related PCB accumulation and exertion of toxic responses. Toxic potential of PCBs is linked to various deleterious effects on human health, including neurotoxicity, immunotoxicity, reproductive toxicity and...
Sat, 07/11/2020 - 22:12
BACKGROUND Pesticides have been widely used to control pests on agricultural products in China, and large amounts of pesticide residues have caused a serious threat to human health. Thus, developing a high‐efficiency pesticide degradation method for fresh vegetables represents a great challenge. In this study, the effects of dielectric barrier discharge (DBD) plasma on the degradation of...
Sat, 07/11/2020 - 06:14
Author(s): Shanshan Wu, Zheng-Zhi Yin, Xiaohui Chen, Xueqing Wang, Datong Wu, Yong Kong Poly(melamine) (PMel) was synthesized via the electropolymerization of melamine monomer, which was then characterized by field-emission scanning electron microscopy (FESEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The possible polymerization mechanisms of melamine were also...
Sat, 07/11/2020 - 02:02
Abstract Background and aims Large areas of paddy fields have been contaminated by cadmium (Cd) in both China and worldwide, resulting in excessive Cd accumulation in rice grains. Here, we investigated the effects of cultivars, water regimes, and growth stages on Cd accumulation in rice with different radial oxygen loss (ROL). Methods Two groups of experiments were conducted: pot trials with...
Fri, 07/10/2020 - 22:17
In recent years, to increase growth rate and prevent infectious diseases, an excessive use of antibiotics in livestock breeding processes has resulted in the presence of antibiotic residues in animal foods. In this experiment, a new kind of electrochemical sensor is prepared based on magnetic mesoporous hollow carbon microspheres (MHM) as a penicillinase (Pen X) adsorption carrier to rapidly...
Fri, 07/10/2020 - 18:02
Melatonin (Mel) is known to prevent and mitigate lead (Pb)-induced gonadotoxicity. However, there is no report in literature on the endogenous levels of different biomarkers after the cessation of Pb exposure, with or without treatment with Mel. Fifty adult male Wistar rats were divided into five groups (N = 10), which included control ((vehicle (normal saline) - treated) − 0.1 ml/day); lead...
Fri, 07/10/2020 - 16:00
Arbuscular mycorrhizal fungi (AMF) are known to improve the resistance of host plants against various heavy metal stresses. However, the arsenic (As) resistance mechanism of AMF-inoculated woody legumes remains unclear. In this study, black locust (Robinia pseudoacacia L.) seedlings were cultivated in potted soils inoculated with or without AMF Rhizoglomus intraradices under three different...
Fri, 07/10/2020 - 08:02
by Bilal Kaaki, Digant Gupta Background Sacral neuromodulation (SNM) is a minimally invasive fully reversible therapy that was approved in 1997 for overactive bladder syndrome (OAB) refractory to behavior modification and pharmacotherapy. Despite being in use for over two decades, the data on medium to long-term safety and efficacy of SNM in OAB is limited. We investigated the medium-term...
Fri, 07/10/2020 - 06:13
Author(s): Verger Philippe, Agamy Neveen, Anshasi Marwa, Al-Yousfi Ahmad Basel Fruits and vegetables represent both a considerable contribution to a healthy dietary pattern of the population and a source of income for countries exporting part of their production. Countries of the Eastern Mediterranean Region (EMR) have undergone rapid urbanization and changes in lifestyle and consumer demands....
Fri, 07/10/2020 - 04:02
Human African trypanosomiasis is a neglected tropical disease caused by Trypanosoma brucei parasites. These protists are unable to produce the purine ring, making them vulnerable to the effects of purine nucleoside analogues. Starting from 3′-deoxytubercidin (5), a lead compound with activity against central-nervous-stage human African trypanosomiasis, we investigate the structure–activity...
Fri, 07/10/2020 - 02:03
The objectives of this study was to diagnose Cd and Pb contamination in soil and to identify the main factors that contribute to the transfer of these elements to tomato plants and fruits and contamination levels of the fruits in tropical mountain conditions. Contamination of the study area soils by Cd and Pb was verified. This contamination stemmed from the intensive use of agricultural inputs,...
Fri, 07/10/2020 - 02:02
The contaminated Kaynaklar soil containing high level of diesel (100,000 mg/kg dw) was treated in slurry systems with solid-to-liquid ratios (S/L) of 1/5, 1/10, and 1/20 to describe the performance of physical treatment. The soil microbial mass was inhibited by using mercury chloride and autoclaving prior to the diesel spiking in order to eliminate any bacterial degradation of non-aqueous phase...
Thu, 07/09/2020 - 16:00
In the present work, we used a double cell screening approach based on phenanthrene (phe) epifluorescence histochemical localization and oxygen radical detection to generate new data about how some specialized cells are involved in tolerance to organic xenobiotics. Thereby, we bring new insights about phe [a common Polycyclic Aromatic Hydrocarbon (PAH)] cell specific detoxification, in two...
Thu, 07/09/2020 - 02:03
Traditional fermented foods are important sources of probiotics, which attract intensive attentions because of their beneficial effects. The potential of probiotic strains to remove heavy metals have also aroused interest from researchers. In this study, the ability of lactic acid bacteria (LAB) isolated from various fermented foods to removal lead (Pb) was tested, and strains with high removal...
Thu, 07/09/2020 - 02:02
Gold mines are widely recognized as important sources of arsenic (As) pollution and this work proposes the use of in situ microbial community enzymatic response to assess the risk of As in soil and sediments surrounding “Morro do Ouro,” the largest industrial gold mine in Brazil. Bacterial community exposed to high metals concentrations deviates energy from growth to cell maintenance modifying...
Wed, 07/08/2020 - 18:02
Cleft palate (CP), a congenital defect in the oral and maxillofacial regions, is difficult to detect prenatally. This study investigated the correlation between differentially expressed proteins in serum and CP induced by all-trans retinoic acid (atRA) and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in mice. We studied 80 mice in the following groups: male mice (male; n = 6), nonpregnant female...
Wed, 07/08/2020 - 06:11
Author(s): Ümmügülsüm Gülcan, Cihadiye Candal Uslu, Ceren Mutlu, Sultan Arslan-Tontul, Mustafa Erbaş The baking in N2 and CO2 atmosphere decreased by 50% the acrylamide, while this level was 99% in SO2. The highest acrylamide content was detected in the control sample as 39.03 µg/kg. Additionally, the lowest HMF content was determined in S-bread as 14.85 mg/kg. The baking atmosphere has a...
Wed, 07/08/2020 - 06:11
Author(s): Maqusood Ahamed, Mohd Javed Akhtar, M.A. Majeed Khan, Hisham A. Alhadlaq Numerous applications of reduced graphene oxide (RGO) and pervasive cadmium (Cd) have led concern about their co-exposure to the environment and human. We studied the combined effects of RGO and Cd in human liver (HepG2) cells. Initially, we found that RGO (up to 50 μg/ml) did not harm to HepG2 cells while Cd...
Wed, 07/08/2020 - 04:02
It has been recognized that collagen peptides of MW 878 Da (CP1) promote osteoblast proliferation and mineralization. The objective of this study is to identify the peptides responsible for proliferation of osteoblast growth, enhancement of ALP (alkaline phosphatase) activity in osteoblasts and promotion of osteoblast mineralization. To this end, the CP1 were fractioned by a series of...
Wed, 07/08/2020 - 02:04
Larvae of Hermetia illucens, commonly known as black soldier fly, efficiently convert organic waste into nutrient-rich supplements for different applications. Here we performed a preliminary experiment to investigate the dynamics of the H. illucens gut microbiota and changes in the composition of the bacterial community in the residue of the larval feed during rearing. We furthermore quantified...
Tue, 07/07/2020 - 16:00
Trace metal contaminations in natural waters, wetlands, and wastewaters pose serious threats to aquatic ecosystems—mainly via targeting microalgae. In this work, we investigated the effects of toxic amounts of chromium and cadmium ions on the structure and function of the photosynthetic machinery of Chlorella variabilis cells. To halt the propagation of cells, we used high concentrations of Cd...
Tue, 07/07/2020 - 16:00
Excessive cadmium (Cd) damages plants by causing cell death. The present study discusses the function of natural resistance-associated macrophage protein (NRAMP) on cell death caused by Cd in Malus hupehensis. MhNRAMP1 was isolated from M. hupehensis roots, and its protein was located in the cell membrane as a transmembrane protein characterized by hydrophobicity. MhNRAMP1 expression in the roots...
Tue, 07/07/2020 - 16:00
During the development of antimicrobial peptides (AMP) as potential therapeutics, antimicrobial susceptibility testing (AST) stands as an essential part of the process in identification and optimisation of candidate AMP. Standard methods for AST, developed almost 60 years ago for testing conventional antibiotics, are not necessarily fit for purpose when it comes to determining the susceptibility...
Tue, 07/07/2020 - 06:14
Author(s): Katarina Baralić, Katarina Živančević, Dragana Javorac, Aleksandra Buha Djordjevic, Milena Anđelković, Dragica Jorgovanović, Evica Antonijević Miljaković, Marijana Ćurčić, Zorica Bulat, Biljana Antonijević, Danijela Đukić-Ćosić Phthalates and bisphenol A, to which people are mainly exposed through food, interfere with the body's endocrine system, along with various other toxic effects...
Tue, 07/07/2020 - 02:03
In order to assess environmental exposure-associated human health risk of dioxin compounds for the population in the vicinity of a municipal solid waste incinerator (MSWI) in Shanghai, the atmospheric samples (n = 24) and soils samples (n = 96) were collected and analyzed to obtain the concentration level, pollution characteristics and seasonal changes of dioxin compounds in environmental medias...
Mon, 07/06/2020 - 22:18
In this review, we highlight new and emerging metrics and tools in esophageal function testing and the clinical manifestations and management of esophageal involvement in connective tissue disorders. Abstract This work summarizes new and emerging metrics and tools in esophageal function testing and their potential clinical impact. Because the diagnostic sensitivity and reliability of conventional...
Mon, 07/06/2020 - 22:16
High levels of p‐Coumaric acid was first isolated and identified from Spirulina. Inhibitory kinetics and mechanism of p‐Coumaric acid on two enzymes were studied. Molecular modeling revealed the Spirulina p‐Coumaric acid binding mode. Abstract Spirulina species are edible with high nutritional as well as potential therapeutic values. In this work, we show that phenolic extracts from Spirulina (p‐...
Mon, 07/06/2020 - 22:15
This research is an application of fiber‐in‐tube solid phase microextraction followed by HPLC‐UV for extraction and determination of trace amounts of bisphenol A. Nano magnetic Fe3O4 was formed on the surface of polypropylene porous hollow fibers to increase the surface area and then it was coated with polystyrene. The introduction of polystyrene improves the surface hydrophobicity and is an...
Mon, 07/06/2020 - 14:05
A study of pesticide residues was investigated in vegetable samples to highlight the trend of drugs obtained from the Jilin Province, China. Total of 230 samples obtained from four regions over the period 2016–2017 were screened for 18 pesticides that were analyzed using gas chromatography with electron capture (GC-ECD). The results showed that 45 samples (19.6%) were positive including 17...
Mon, 07/06/2020 - 04:03
Acetylcholinesterase inactivating compounds, such as organophosphate (OP) and carbamate (CM) pesticides, are widely used in agriculture to ensure sustainable production of food and feed. As a consequence of their applications, they would result in neurotoxicity, even death. In this essence, the development of enzyme inhibition methods still shows great significance as rapid detection techniques...
Sun, 07/05/2020 - 06:13
Author(s): Fangfang Yan, Li Zhao, Wanbing Chen, Qun Lu, Cuie Tang, Chengming Wang, Rui Liu This study evaluated the stabilities of catechin (C), epicatechin (EC), procyanidin B3, procyanidin A1 and epicatechin-(4β → 6)-epicatechin-(2β → O → 7,4β → 8)-catechin (PCA-trimer) during in vitro digestion, as well as characterized their digestion products (DPs), and evaluated their protective effects...
Sun, 07/05/2020 - 06:10
Author(s): Wei Quan, Yong Li, Ye Jiao, Chaoyi Xue, Guoping Liu, Zhaojun Wang, Zhiyong He, Fang Qin, Maomao Zeng, Jie Chen The simultaneous formation of acrylamide; β-carboline heterocyclic amines (HAs): harmane and norharmane; and advanced glycation end products (AGEs) (Nε-(carboxymethyl)lysine (CML) and Nε-(carboxyethyl)lysine (CEL)) was analyzed based on an aqueous model system. The model...
Sun, 07/05/2020 - 06:10
Author(s): Wantang Huang, Hua Yin, Yuanyuan Yu, Guining Lu, Zhi Dang, Zhanghong Chen In this study, Pseudomonas aeruginosa was applied to degrade tetrabromobisphenol A (TBBPA) with glucose as a co-metabolic substrate. Influencing factors of co-metabolic degradation such as pH, TBBPA and glucose concentration were examined and the degradation efficiency under optimal condition reached about 50% on...
Sun, 07/05/2020 - 00:00
Overwhelming empirical evidence has highlighted the contribution of indiscriminate antibiotic usage (ABU) in food animals to the overall burden of antibiotic resistance (ABR) in humans, thus making antibiotic use the main selective pressure driving antibiotic resistance. The social and behavioral perspective on antibiotic use and resistance in poultry is limited. Our study therefore aimed at...
Sat, 07/04/2020 - 06:16
Author(s): Dilumi W.K. Liyanage, Dmytro P. Yevtushenko, Michele Konschuh, Benoît Bizimungu, Zhen-Xiang Lu Potato chips are among the highest contributors to the dietary intake of acrylamide, a potent neurotoxin and likely carcinogen in heat-processed foods. The present study aimed to determine the effects of frying conditions and additive treatments on reducing sugars, asparagine levels, and...
Sat, 07/04/2020 - 02:02
Marine pollution has increased reaching the entire marine environment, from the surface to the deepest sediment, and has become more concerning in the last 70 years. Persistent organic pollutants (POPs) are a fraction of ocean waste that includes, among the others, polycyclic aromatic hydrocarbons (PAHs) and plastic polymers. These chemicals have an extremely long half-life, and (bio)accumulate...
Fri, 07/03/2020 - 22:15
Detecting pesticide residues in human serum is a challenging process. This study developed and validated a method for the extraction and recovery of residues of multiple classes of pesticides from serum using one reagent. Salt‐assisted acetonitrile extraction and HPLC with quadrupole time of flight MS/MS were used to quantitate 34 pesticides classified in nine groups of chemicals in human serum...
Fri, 07/03/2020 - 16:00
In natural environments, the production of neurotoxic and bioaccumulative methylmercury (MeHg) is mediated by microorganisms carrying the genes hgcA and hgcB. However, the contribution of these microorganisms to mercury (Hg) methylation or MeHg accumulation in the ocean is poorly understood. Here we determined the total Hg (THg) and MeHg concentrations in seawater samples and conducted a...
Fri, 07/03/2020 - 10:02
According to the World Health Organization, arsenic is the water contaminant that affects the largest number of people worldwide. To limit its impact on the population, inexpensive, quick, and easy-to-use systems of detection are required. One promising solution could be the use of whole-cell biosensors, which have been extensively studied and could meet all these criteria even though they often...
Fri, 07/03/2020 - 06:10
Author(s): Y. Ma, Y.Z. Shi, Q.J. Wu, Y.Q. Wang, J.P. Wang, Z.H. Liu In this study, we explored the effect of dietary lead nitrate on the zootechnical performance, egg quality, accumulation of ovarian plumbum (Pb), follicular atresia rate and ovarian oxidative stress in laying hens. Furthermore, the nuclear factor-erythroid 2-related factor-2 (Nrf2) signaling molecule was studied to reveal the...
Fri, 07/03/2020 - 02:02
Summarized the heavy metal pollution caused by natural and human activities. The natural causes include the migration and redistribution of soil debris and the hydraulic migration of soil parent rock with high background value under the action of wind; human factors include mining, abandoned mining areas, fertilizer and pesticide application, and sewage irrigation. By examining the sources of...
Thu, 07/02/2020 - 08:02
Hydrogen gas (H2) has a possible signaling role in many developmental and adaptive plant responses, including mitigating the harmful effects of cadmium (Cd) uptake from soil. We used electrophysiological and molecular approaches to understand how H2 ameliorates Cd toxicity in pak choi (Brassica campestris ssp. chinensis). Exposure of pak choi roots to Cd resulted in a rapid increase in the...
Thu, 07/02/2020 - 08:02
The elements Zinc (Zn) and cadmium (Cd) have similar chemical and physical properties, but contrasting physiological effects in higher organisms. In plants, Zn/Cd transport is mediated by various transporter proteins belonging to different families. In this study, we functionally characterized two Zn transporter genes in rice (Oryza sativa), ZINC TRANSPORTER5 (OsZIP5) and ZINC TRANSPORTER9 (...
Thu, 07/02/2020 - 06:16
Author(s): Sinosh Skariyachan, Roshini Ravishankar, Dharshini Gopal, Aditi G. Muddebihalkar, Akshay Uttarkar, Prinith Kaveramma Uluvangada Praveen, Vidya Niranjan Pseudomonas aeruginosa has become a global concern due to its extreme resistance to most of the last resort antibiotics. Present study focuses on the screening of potential molecular targets involved in regulation of biofilm formation...
Thu, 07/02/2020 - 06:13
Author(s): Ching-Huang Lai, Chia-Chi Chou, Hsiao-Chi Chuang, Gu-Jiun Lin, Chih-Hong Pan, Wei-Liang Chen Advanced glycation end products (AGE) and the receptor for AGE (RAGE) have been found to be pivotal biomarkers to predict the risk of inflammation and oxidative stress. Limited evidence focuses on the influence of occupational exposure to polycyclic aromatic hydrocarbon (PAH) and metal fumes on...
Thu, 07/02/2020 - 06:12
LWT
Author(s): Luca Maria Chiesa, Lucia DeCastelli, Maria Nobile, Francesca Martucci, Giacomo Mosconi, Mauro Fontana, Marta Castrica, Francesco Arioli, Sara Panseri Antibiotics are widely used in livestock production as disease treatment, prevention and improve feeding efficiency. In this study three screenings and a multiclass method by Liquid Chromatography tandem Mass High Resolution Spectrometry...

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