Chemical contaminants

Mon, 06/22/2020 - 22:12
BACKGROUND Central kitchen is a new trend in food industry where centralized preparation and processing of fresh foods as well as distribution of finished or semi‐finished products to catering chains or related units take place. Fresh foods processed by a central kitchen mainly include fruit and vegetables, meat, aquatic products and edible fungi; these foods have high water activities and...
Mon, 06/22/2020 - 06:11
Author(s): Yamdeu Joseph Hubert Galani, Michael Houbraken, Abukari Wumbei, Joseph Fovo Djeugap, Daniel Fotio, Yun Yun Gong, Pieter Spanoghe This study monitored 81 pesticides residues in 160 samples of 11 dry agricultural products collected in the 3 largest cities of Cameroon, extracted using QuEChERS method and analysed by liquid chromatography tandem mass spectrometry (LC-MS/MS). Residues of 58...
Sun, 06/21/2020 - 02:03
The acrylamide content and color formation (CIE L*, a* and b*) of hazelnuts which processed at different roasting temperatures of 130 °C, 150 °C, 160 °C and 170 °C with roasting time for 15 and 30 min were evaluated. Acrylamide contents of roasted hazelnuts were measured by means of Ultra Performance Liquid Chromatography (UPLC). Acrylamide formation of roasted hazelnuts was undetectable and...
Sun, 06/21/2020 - 02:03
The growth response, tolerance, and enrichment characteristics of six ornamental species, Chlorophytum comosum, Calendula officinalis, Iris lacteal, Belamcanda chinensis, Saponaria officinalis, and Polygonum lapathifolium were studied under hydroponic culture with lead (Pb) concentrations ranging from 0 to 1000 mg/L. The results showed that the growth of the tested ornamental species under Pb...
Sat, 06/20/2020 - 08:02
by Emily E. Lynch, Helen C. S. Meier Environmental conditions that contribute to childhood lead exposure are spatially patterned. Socioeconomic and racial inequities in childhood lead exposure have been well documented, however childhood lead exposure in Milwaukee is understudied. As a segregated rustbelt metropolitan area with childhood lead exposure concerns, Milwaukee is uniquely positioned to...
Sat, 06/20/2020 - 06:11
Author(s): Hemily Batista-Silva, Keyla Rodrigues, Kieiv Resende Sousa de Moura, Glen Van Der Kraak, Christelle Delalande-Lecapitaine, Fátima Regina Mena Barreto Silva This study investigated the acute in vitro effect of low-concentration bisphenol A (BPA) on calcium (45Ca2+) influx in zebrafish (Danio rerio) testis and examined whether intracellular Ca2+ was involved in the effects of BPA on...
Sat, 06/20/2020 - 02:02
The effects of atmospheric precipitation on heavy metal accumulation and deactivation amendment in wheat surrounding a lead smelter were studied. The total precipitation amounts of Cd, Pb, and As in an in situ test were noticeably more than their amounts in an off-site test over the entire growing period of wheat. In the same soil-wheat system, the heavy metal concentrations of wheat leaves in...
Fri, 06/19/2020 - 22:13
Wetlands are common sites of active Hg methylation by anaerobic microbes; however, the amount of methylmercury produced varies greatly, as Hg methylation is dependent upon both the availability of Hg and the composition and activity of the microbial community involved. In this study, we identified the major microbial guilds responsible for Hg methylation along a trophic gradient composed of two...
Fri, 06/19/2020 - 16:00
Progressive pollution due to toxic metals significantly undermines global environmental sustainability efforts. Chromium (Cr) is one of the most dangerous to human health. The use of plants to rid the environment of such pollutants “phytoremediation” proves to be a promising alternative to the current remediation methods. In the present study, inductively coupled plasma optical emission...
Fri, 06/19/2020 - 16:00
Corn (Zea mays L.) is not only an important food source, but also has numerous uses, including for biofuels, fillers for cosmetics, glues, and so on. The amount of corn grown in the U.S. has significantly increased since the 1960’s and with it, the demand for synthetic fertilizers and pesticides/fungicides to enhance its production. However, the downside of the continuous use of these products,...
Fri, 06/19/2020 - 08:02
In recent years, pesticide residues in food have increasingly become the focus of public attention. However, the standard system of pesticide maximum residue limits in fermented food is imperfect, which can lead to potential safety risks to consumers. In this context, the aim of the study was to assess the potential effects of paclobutrazol residue on the yogurt fermentation process. We examined...
Fri, 06/19/2020 - 04:04
Cocoa and chocolate can contain cadmium (Cd) and lead (Pb) from natural and anthropogenic sources. This perspective provides background on the origin, occurrence, and factors affecting Cd and Pb levels in chocolate products as well as ongoing international efforts to mitigate Cd and Pb in these popular foods, particularly the higher Cd levels observed in some cocoa and chocolate originating from...
Fri, 06/19/2020 - 02:02
The mining sector has great importance to the economic activity in Brazil. However, it is also responsible for several environmental impacts such as the rupture of the Fundão dam (Mariana, Brazil) that resulted in the spillage of 50 million m3 of mining tailings in the Doce River Basin. This study evaluated the acute and chronic effects of Fundão tailings on growth, development, respiration rates...
Thu, 06/18/2020 - 06:11
Author(s): Hongbiao Cui, Lulu Shen, Xiong Yang, Shiwen Zhang, Qitao Yi, Lin Meng, Xuebo Zheng, Qiuya Wang, Jun Zhou Iron (Fe) oxides are intimately coupled with phosphorus and closely associated with the bioavailability of potential toxic elements (PTEs) in soil. Thus, Fe oxides may influence the stabilization of PTEs in contaminated soils amended by phosphorus. To evaluate the effects of...
Thu, 06/18/2020 - 04:04
An analytical program for multiclass, multiresidue residue analysis to qualitatively and quantitatively determine veterinary drug compounds in game meats by LC-MS/MS has been developed and validated. The method was validated for the analysis of muscle from bison, deer, elk, and rabbit to test for 112 veterinary drug residues from the following drug classes: β-agonists, anthelmintics, anti-...
Thu, 06/18/2020 - 02:03
A bulky waste, oyster shell (OS), was calcinated at 400–800°C to produce Ca-rich products (OS400–OS800) to reduce the human health risk of soil cadmium (Cd) and arsenic (As). Thermogravimetric analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET method were used to characterize OS and its calcined products. OS and OS400–OS700 removed little Cd and As from water, whereas...
Thu, 06/18/2020 - 02:03
The concentrations of zinc, copper, lead and cadmium owing to vehicles were analyzed in roadside soils during all the four seasons from Faisalabad-Gojra road (M-4) and Gojra-Jhang road (GJR) in the Punjab, Pakistan. Results indicated that all the polluted sites along the roadside had comparatively higher metal concentrations as compared to control, nevertheless, spatio-temporal variations in...
Thu, 06/18/2020 - 02:02
A selective and reliable method was developed and validated for the determination of 14 lipophilic pesticides in raw propolis by gas chromatography–tandem mass spectrometry (GC-MS/MS) analysis. A test portion of milled sample was extracted with n-hexane followed by back extraction with acetonitrile and cleanup using EMR-Lipid and Florisil column adsorption. Matrix-matched standards were used to...
Thu, 06/18/2020 - 02:02
In spite of the fact that pesticides enhanced the quality and yield of the agricultural production however do have certain serious effects on the environment. This study was carried out for isolation and molecular identification of microorganisms from water for malathion biodegradation in aquatic system. PCR analysis was used for identification of the isolated fungus. The growth kinetics of A....
Wed, 06/17/2020 - 22:17
Even though antimicrobial‐resistant bacteria have begun to be detected in wildlife, raising important issues related to their transmission and persistence of clinically important pathogens in the environment, little is known about the role of these bacteria on wildlife health, especially on endangered species. The Brazilian merganser (Mergus octosetaceus) is one of the most threatened waterfowl...
Wed, 06/17/2020 - 22:15
A novel, facile, and robust strategy was proposed to increase the pore size and mechanical strength of cryogels. By mixing the monomers of acrylamide and 2‐hydroxyethyl methacrylate as the precursor, a monolithic copolymer cryogel with large interconnected pores and thick pore walls was prepared. Hydrogen bonding between the two monomers contributed to the entanglement and aggregation of the...
Wed, 06/17/2020 - 06:09
Author(s): Hyuck Soo Kim, Byoung-Hwan Seo, Gary Owens, Young-Nam Kim, Jae-Hwang Lee, Mina Lee, Kwon-Rae Kim The phytoavailability of heavy metals in soils is important for both food safety and environmental management. Hence soil metal phytoavailability threshold values need to be established based on a firm scientific basis. In this study, optimal Cd phytoavailability threshold values, were...
Wed, 06/17/2020 - 02:02
Due to high toxicity to mammals and hazard to the ecosystem, parathion has been banned or limited for use in many countries. It is essential to ensure food safety by parathion suspecting. On-site testing, as a critical component of the food chain safe system, plays a major role in the protection of food safety and human health. In this study, based on monoclonal antibody (Mab), a rapid and...
Tue, 06/16/2020 - 22:15
Pesticide residue and saponin content are two important factors affecting the quality of ginseng products. In this paper, the effects of four new drying processing technologies on pesticide residues and saponins in ginseng were studied. The change in pesticide residue was determined by GC and the content of ginsenoside was determined by HPLC. After the microwave treatment for 32 min, the...
Tue, 06/16/2020 - 18:02
The aim of this research was to determine concentration, spatial distribution and human health risks of four trace elements (arsenic (As), cadmium (Cd), lead (Pb) and nickel (Ni)) in particulate matter PM10 in the mining and smelting basin, Bor, in Serbia. Based on the results, it was concluded that the air in the Bor Basin does not contain significant trace element concentrations despite mining...
Tue, 06/16/2020 - 08:02
The uncontrolled use of pesticides on leafy vegetables has been frequently reported in recent years. The aim of this study was to evaluate the influence of pH, total acidity and various technological processes for the preparation of babenda on pesticide residues contained in leafy vegetable. The "babenda" is a Burkinabè dish consisting mainly of Hibiscus sabdariffa, Amaranthus hybridus and Cleome...
Tue, 06/16/2020 - 06:15
Author(s): Su Lee Kuek, Azmil Haizam Ahmad Tarmizi, Raznim Arni Abd Razak, Selamat Jinap, Norliza Saparin, Maimunah Sanny This study aims to investigate the influence of lipid towards acrylamide formation during intermittent frying of French fries. A total of 80 frying cycles were performed on par-fried potato strips in different vegetable oils namely as red palm olein, palm olein, sunflower oil...
Mon, 06/15/2020 - 06:09
Author(s): Sanjay Saini, Lavi Rani, Neha Shukla, Monisha Banerjee, Debapratim Kar Chowdhuri, Naveen Kumar Gautam Xenobiotic mediated renal toxicity is one of the major health concerns to the organisms, including humans. New chemicals with nephrotoxic potential are continuously being added to the list of existing nephrotoxicants. To predict the nephrotoxicity of these new chemicals, reliable and...
Mon, 06/15/2020 - 06:09
Author(s): Marco Aurelio M. Freire, Rafael Rodrigues Lima, Priscila Cunha Nascimento, Walace Gomes-Leal, Antonio Pereira Mercury (Hg) is an environmental contaminant that poses great risk to human health. However, it is still widely used in artisanal gold-mining enterprises around the world, especially in developing countries. Methylmercury (MeHg) is produced environmentally by biomethylation of...
Mon, 06/15/2020 - 02:03
It is known that the current treatment for toxoplasmosis causes side effects. Thus, it is essential to develop new therapies with reduced adverse effects while concurrently maintaining broad coverage and prophylactic therapy. Melatonin is a hormone that participates in the circadian cycle in vertebrates and has antioxidant, immunomodulatory, and antitumoral functions. In addition, it has been...
Sun, 06/14/2020 - 06:10
Author(s): Yanan Yuan, Yehong Han, Dandan Han, Chunliu Yang, Hongyuan Yan Due to the excessive use of pesticides, which presents a threat to public health, large quantities of vegetables and fruits need to be analyzed. Herein, a rapid, low-cost, miniaturized ultrasound-assisted dispersive-filter extraction (UADFE), coupled with high-performance liquid chromatography (HPLC) was developed for the...
Sun, 06/14/2020 - 06:09
Author(s): Kristi Tatsi, Thomas H. Hutchinson, Richard D. Handy The bioaccumulation potential and toxic effects of engineered nanomaterials (ENMs) to earthworms are poorly understood. Two studies were conducted following OECD TG 222 on Eisenia fetida to assess the effects of CdTe QDs with different coatings and soil ageing respectively. Earthworms were exposed to carboxylate (COOH), ammonium (NH4...
Sun, 06/14/2020 - 06:09
Author(s): Qingtie Xiao, Yujie Wang, Qixin Lü, Huanhuan Wen, Bolun Han, Shen Chen, Xinyu Zheng, Ruiyu Lin Screening new accumulators of heavy metal and identifying their tolerance, enrichment capacity of heavy metals are currently hot issues in phytoremediation research. A series of hydroponic experiments were conducted to analyze the effects of glutathione and phytochelatins in roots, stems, and...
Sun, 06/14/2020 - 06:09
Author(s): Alina Wiszniewska, Iwona Kamińska, Ewa Hanus-Fajerska, Elwira Sliwinska, Aleksandra Koźmińska This study compared co-tolerance to salinity and cadmium and investigated its mechanisms in a facultative metallophyte Silene vulgaris originating from distinct habitats. Shoots of calamine (Cal) and non-metallicolous (N-Cal) ecotypes grown in vitro were exposed to 10 and 100 mM NaCl, 5 μM...
Sun, 06/14/2020 - 00:00
The discovery of antibiotics has revolutionized the medicine and treatment of microbial infections. However, the current scenario has highlighted the difficulties in marketing new antibiotics and an exponential increase in the appearance of resistant strains. On the other hand, research in the field of drug-discovery has revaluated the potential of natural products as a unique source for new...
Sat, 06/13/2020 - 14:05
Starting from the suspicion that the medicinal herbs may contain traces of pesticides and taking into account the risks of patients being exposed to contaminated products, the aim of this research was to evaluate the pesticide residues and the degree of their transfer (%) in three types of preparations (infusion, decoctionand cold maceration), for four medicinal plant species very often used in...
Sat, 06/13/2020 - 14:05
In the present study, tea variety and proportions and tea nang production conditions were optimised to improve tea nang flavour, and dynamic changes in polyphenols and acrylamide content were determined. Orthogonal experimental design was adopted to optimise processing of low-acrylamide tea nang through a multi-index integrated evaluation method (MIEM) and a single-index balanced evaluation...
Sat, 06/13/2020 - 08:02
by Tugce Olgun, Sydney E. Everhart, Troy Anderson, Judy Wu-Smart Managed honey bees (Apis mellifera L.) and wild bees provide critical ecological services that shape and sustain natural, agricultural, and urban landscapes. In recent years, declines in bee populations have highlighted the importance of the pollination services they provide and the need for more research into the reasons for global...
Sat, 06/13/2020 - 08:02
by Vaithish Velazhahan, Przemyslaw Glaza, Alvaro I. Herrera, Om Prakash, Michal Zolkiewski, Brian V. Geisbrecht, Kathrin Schrick Flavonoids are plant-derived compounds that occur abundantly in fruits and vegetables and have been shown to possess potent anti-cancer, antioxidant, and anti-inflammatory properties. However, their direct targets and molecular mechanism of action are not well...
Sat, 06/13/2020 - 06:12
Author(s): Huihuang Xiong, Lan Guo, Xuejin Mao, Ting Tan, Hao Wan, Yiqun Wan A magnetic hydrophilic molecularly imprinted material (MIM) with multiple stimuli-responses was prepared for efficient recognition of bisphenol A (BPA). MIM consisted of a magnetic core, an inner silica dioxide shell and an outer hydrophilic polymer shell, responsive for rapid magnetic separation, protection of the...
Sat, 06/13/2020 - 02:02
A combined process comprised of electro-Fenton and bioslurry (EF–bioslurry) was developed at lab scale for remediating a real coking plant soil with an initial polycyclic aromatic hydrocarbons (PAHs) content of 3605 mg/kg. Sodium citrate was used as a complexant to keep the iron in solution at near-neutral pH conditions for increasing the reaction rate. The appropriate order of application was to...
Sat, 06/13/2020 - 02:02
Abstract Aims The study aimed at characterizing the patterns of natural variation in the tolerance and accumulation capacities for zinc (Zn), cadmium (Cd), and nickel (Ni) between and within edaphic ecotypes of the Zn/Cd/Ni hyperaccumulator, Noccaea caerulescens. Methods Tolerance was assessed in a hydroponic ‘sequential exposure’ test, using the lowest concentration that completely arrested...
Fri, 06/12/2020 - 16:00
Cucumber (Cucumis sativus L.) is one of the most economically important fruits of the Cucurbitaceae family, therefore consideration of potential pesticide residues in the fruit in the context of cucumber breeding and production programs is important. Propamocarb (a pesticide commonly used to prevent downy mildew) is widely used in cucumber cultivation, but the molecular mechanism underlying the...
Fri, 06/12/2020 - 16:00
Increasing food demand under climate change constraints may challenge and strain agricultural systems. The use of crop models to assess genotypes performance across diverse target environments and management practices, i.e., the genetic × environment × management interaction (GEMI), can help understand suitability of genotype and agronomic practices, and possibly accelerate turnaround in plant...
Fri, 06/12/2020 - 08:02
Soil cadmium (Cd) pollution threatens food safety. This study aimed to identify genes related to Cd accumulation in rice. Low- (Shennong 315, short for S315) and high- (Shendao 47, short for S47) Cd-accumulative rice cultivars were incubated with CdCl2·2.5H2O. RNA-seq and weighted gene co-expression network analysis (WGCNA) were performed to identify the modules and genes associated with Cd-...
Fri, 06/12/2020 - 04:03
Plant fungal diseases have caused great decreases in crop quality and yield. As one of the considerable agricultural diseases, cucumber downy mildew (CDM) caused by pseudoperonospora cubensis seriously influences the production of cucumber. Amisulbrom is a commercial agricultural fungicide developed by Nissan Chemical, Ltd., for the control of oomycetes diseases that is highly effective against...
Fri, 06/12/2020 - 04:02
Antibiotic residues in consumer foods pose a threat to human health and contribute to increasing antimicrobial resistance. The study was conducted from January to July 2019 in six provinces in Viet Nam. In total, 360 pork samples and 360 chicken meat samples were collected for analysis. The samples were first screened with an ELISA test kit for residues in the beta-lactam, tetracycline and...
Thu, 06/11/2020 - 14:05
A liquid chromatography-high resolution mass spectrometry (LC-HRMS) method was developed and validated for the determination of residual peptide antibiotics (bacitracin A, colistin A and B, enramycin A and B, virginiamycin M1 and S1) in bovine milk. LC-HRMS accurate mass data provided the necessary selectivity and sensitivity to quantitate and identify these important antibiotics in milk at...
Thu, 06/11/2020 - 06:11
Author(s): Ling Zhao, Yan Li, Wenjie Ren, Yang Huang, Xiaomi Wang, Zhaocong Fu, Wenting Ma, Ying Teng, Yongming Luo In this study, 73 samples from soils planted with Panax notoginseng and six P. notoginseng samples were collected in Yunnan Province to investigate the residual levels of six pesticides and their relationships with P. notoginseng and soil. All six pesticides were detected in the...

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