Pesticide residues

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Mon, 01/18/2021 - 02:02
The concept of the Nitrogen (N) cycle has been modified over the years based on certain new pathways, including comammox, anammox, and DNRA (dissimilatory nitrate reduction to ammonium). Comammox, nitrification, anammox, denitrification, DNRA, and nitrogen fixation pathways play key roles in the N cycle in paddy soils. Pesticides and chemical fertilizers’ effects on the N cycle in paddy soils...
Wed, 01/13/2021 - 02:02
A simple methodology for the simultaneous determination of 67 pesticides, 25 veterinary drugs, and aflatoxin M1 in raw milk was developed and validated. After evaluating different combinations of sample preparation protocols, an extraction with acetonitrile:water (2:1) with QuEChERS citrate buffer salts and a combination of RP-C18 and anhydrous magnesium sulfate for the dispersive clean-up, using...
Sun, 01/03/2021 - 02:02
Increases in the levels of environmental contaminants are reflected in wild animals, which are early indicators of pollution. Hatay is an ecologically important region with a high intensity of industrial and agricultural activities. This study aimed to investigate the contamination levels of metals and organochlorine pesticides associated with environmental pollution in tissues of wild boars from...
Sat, 01/02/2021 - 06:12
Author(s): Jiadong Li, Jun Cai, Minting Ma, Liping Li, Linping Lu, Yu Wang, Chenglong Wang, Jinyi Yang, Zhenlin Xu, Min Yao, Xing Shen, Hong Wang The cholinesterase-based spectrophotometric methods for detection of organophosphate pesticides (OPs) and carbamate pesticides (CPs) have been proposed as a good choice for their high efficiency, simplicity and low cost. The enzyme, as a core reagent,...
Thu, 12/31/2020 - 04:02
According to a simple guest-replacement fluorescence turn-on mechanism, we constructed a fluorescent probe system based on cucurbit[10]uril (Q[10]) and protonated acridine (AD) to detect the pesticide dodine (DD). Formation of a homoternary inclusion complex AD2@Q[10] in both aqueous solution and solid state was studied by means of 1H NMR spectroscopy and X-ray crystallography. Although AD can...
Sun, 12/27/2020 - 22:09
BACKGROUND Chlorpyrifos (CPF) is a broad‐spectrum organophosphorus pesticide widely used to control tea geometrid (Ectropis oblique) and tea green leafhoppers (Empoasca pirisuga Matumura) in tea trees. The major metabolite of CPF in water, plants and animals is 3,5,6‐trichloro‐2‐pyridinol (TCP), which is more toxic than CPF. However, dissipation pattern of CPF in tea is unknown. RESULTS An...
Sun, 12/27/2020 - 22:09
Background Pymetrozine is a widely used pesticide. It is challenging‐to‐analyse and difficult to manage due to the large gap in its global maximum residue limits (MRLs) in tea. Therefore, development of a high‐efficiency detection method for the evaluation of the transfer of residual pymetrozine from tea plantations to tea cups is of prime significance. Results An analytical method for the...
Fri, 12/25/2020 - 04:02
Unadorned carbon nitride was synthesized via different nitrogen-rich precursors by thermal polymerization and applied to multifungicides for simultaneous photodegradation in the present study. Urea-derived carbon nitride (UCN) was verified to be most efficient in fungicide removal. The influences of catalyst dosage and pH were studied during the photodegradation process. Hydroxyl radical (•OH)...
Thu, 12/24/2020 - 08:05
by Jianhui Zhen, Gang Liang, Ruichun Chen, Wenshen Jia Acetamiprid (ACE) is a kind of broad-spectrum pesticide that has potential health risk to human beings. Aptamers (Ap-DNA (1)) have a great potential as analytical tools for pesticide detection. In this work, a label-free electrochemical sensing assay for ACE determination is presented by electrochemical impedance spectroscopy (EIS). And the...
Wed, 12/23/2020 - 14:05
The current study was conducted to assess the levels of organophosphates and carbamates in vegetables in Kenya and to examine potential consumer health risks. A total of 90 samples were analysed by liquid chromatography/high-resolution tandem mass spectrometry. Residues of acephate, chlorpyrifos, methamidophos, omethoate and profenofos were found in 22% of the samples, ranging from 10 to 1343 μg/...
Tue, 12/22/2020 - 04:02
Residual pesticides in soil may be taken up by crops and negatively affect food safety. The uptake mechanism of imidacloprid and propiconazole was studied using wheat roots. The factors affecting root uptake were also studied with different crops and in different soils. Imidacloprid and propiconazole were taken up by wheat roots mainly through the symplastic and apoplastic pathways, respectively...
Fri, 12/18/2020 - 10:02
Methomyl {bis[1-methylthioacetaldehyde-O-(N-methylcarbamoyl)oximino]sulfide} is a highly toxic oxime carbamate insecticide. Several methomyl-degrading microorganisms have been reported so far, but the role of specific enzymes and genes in this process is still unexplored. In this study, a protein annotated as a carbamate C-N hydrolase was identified in the methomyl-degrading strain Aminobacter...
Thu, 12/17/2020 - 22:16
In our study, a food safety management system was developed for a chaga mushroom biotechnology product manufacturer, with the purpose of meeting the quality demands of customers and enhancing the manufacturer's reputation. The study focused on identifying the potentially significant hazards present at each stage of the production process for chaga mushroom capsule products, and on ensuring that...
Thu, 12/17/2020 - 06:17
Author(s): Jordana Alves Ferreira, Sonia C.N. Queiroz Several pesticides are used in the cultivation of coconut palm, hence evaluation of the residues from these substances must be analyzed in the fruit, to provide and ensure the food safety. Therefore, the development and validation of comprehensive and effective methods becomes crucial, given the complexity of the matrix. Thus, a novel method...
Fri, 12/11/2020 - 14:03
The matrix effect in complex spices and herbs presents a great challenge to the simultaneous, rapid, quantitative analysis of multiple pesticides by mass spectrometry. The aim of this work was to develop and validate an effective UPLC–MS/MS multi-residue method for the analysis of pesticide residues to reduce matrix effects in four spices and one herb and infer which component caused the matrix...
Thu, 12/10/2020 - 08:01
by Sonja Fiedler, Hannah Wünnemann, Isabel Hofmann, Natalie Theobalt, Annette Feuchtinger, Axel Walch, Julia Schwaiger, Rüdiger Wanke, Andreas Blutke Rainbow trout (Oncorhynchus mykiss) are frequently used as experimental animals in ecotoxicological studies, in which they are experimentally exposed to defined concentrations of test substances, such as heavy metals, pesticides, or pharmaceuticals...
Wed, 12/09/2020 - 04:02
A study was conducted to evaluate the efficacy of seven decontamination processes in reducing the pesticide mixture load of six insecticides (quinalphos, profenophos, ethion, lambda- cyhalothrin, imidacloprid and acetamiprid) from chilli alongwith one control treatment where the pesticide residues were extracted without following any decontamination procedure. The extraction of the insecticides...
Tue, 12/08/2020 - 22:10
BACKGROUND Pesticide residues in agricultural products and foods pose a serious threat to human health, therefore a simple, rapid and direct method is urgently needed for pesticide residue detection. In addition to completing the detection of acetamiprid in the cabbage extracting solution, the main target of this study was to establish an in‐situ surface enhanced Raman scattering (SERS) method,...
Mon, 12/07/2020 - 06:12
Author(s): Benliang Deng, Chunbo Xia, Shan Tian, Haojie Shi Melatonin reportedly delays postharvest fruit senescence, but information on its in vivo effects on pesticide degradation in postharvest fruit is limited. In this study, we investigated the effect of melatonin on the regulation of pesticide degradation and antioxidant nutrient accumulation in jujube fruit after storage. The results...
Sun, 12/06/2020 - 06:12
Author(s): Ozgur Golge, Seren Cinpolat, Bulent Kabak The monitoring of pesticide residues in fruits and vegetables is a great concern in public health and international trade. This study aims to assess the incidence and quantification of pesticides in gherkins cultivated in Turkey. The sample preparation was based on QuEChERS (quick, easy, cheap, effective, rugged, and safe) extraction. The...
Sat, 12/05/2020 - 06:23
Author(s): Xuejin Mao, Weiming Xiao, Yiqun Wan, Zhanming Li, Dongmei Luo, Hongshun Yang An efficient dispersive solid-phase extraction method was developed to trace pesticide residues in commonly consumed vegetables. In this method, UiO-66 with uniform micropores was used as sorbent, and gas chromatography-mass spectrometry was applied to detect the pesticides. Thanks to the size sieving action...
Thu, 12/03/2020 - 22:11
ABSTRACT Background Fruit and vegetable consumption has increased among masses due to their tremendous health benefits. However, recent studies have shown that contaminated products may serve as a vehicle for foodborne pathogens and harmful chemicals. Therefore, fresh vegetables must be decontaminated before consumption to ensure food safety. Results In this study, the combined decontamination...
Thu, 12/03/2020 - 22:11
BACKGROUND Bananas are vulnerable to disease and insect pests after producing fruit. In order to increase the yield and produce high‐quality fruit, the insecticides and fungicides are mixed and applied 2‐3 times on banana, then the fruit is bagging. Buprofezin, imidacloprid, difenoconazole, and pyraclostrobin are widely used on banana. However, there is a lack of research on the effect of fruit...
Wed, 12/02/2020 - 06:12
Author(s): Laíse Aparecida Fonseca Dinali, Hanna Leijoto de Oliveira, Leila Suleimara Teixeira, Warley de Souza Borges, Keyller Bastos Borges In this work, we report the synthesis of a mesoporous molecularly imprinted polymer on the surface of silica nanoparticles (core@mMIP) to be applied as adsorbent in microextraction by packed sorbent (MEPS) for selective determination of pesticides in apple...
Wed, 12/02/2020 - 06:12
Author(s): Guiju Xu, Longfei Hou, Baoyu Li, Xiaoli Wang, Lu Liu, Na Li, Ming-Lin Wang, Ru-Song Zhao The development of sensitive method for analysis of pesticide residue is of great significance to ensure food safety and promote globalization of food trade. An original method was proposed for analysis of phenoxy carboxylic acids (PCAs) pesticide in plant-derived food. To concentrate trace PCAs,...
Sun, 11/29/2020 - 22:14
Pesticide residues in food matrices, threatening the survival and development of humanity, is one of the critical challenges worldwide. Metal–organic frameworks (MOFs) possess excellent properties, which include excellent adsorption capacity, tailorable shape and size, hierarchical structure, numerous surface‐active sites, high specific surface areas, high chemical stabilities, and ease of...
Thu, 11/26/2020 - 00:00
Agricultural fungicides contaminate the environment and promote the spread of fungicide-resistant strains of pathogenic fungi. The enhancement of pathogen sensitivity to these pesticides using chemosensitizers allows the reducing of fungicide dosages without a decrease in their efficiency. Using Petri plate and microplate bioassays, 6-demethylmevinolin (6-DMM), a putative sensitizer of a...
Wed, 11/25/2020 - 14:06
Helium is commonly used as a carrier gas in gas chromatography-tandem mass spectrometry (GC-MS/MS); however, there are growing concerns regarding its global shortage and the resulting limited supply and high cost. Using nitrogen as an alternative carrier gas in GC-MS/MS with the widely used electron ionisation (EI) technique leads to a significantly lower sensitivity; thus, in this study, we...
Wed, 11/25/2020 - 10:01
Evolution of bacterial tolerance to antimicrobials precedes evolution of resistance and may result in cross-tolerance, cross-resistance, or collateral sensitivity to other antibiotics. Transient exposure of gut bacteria to glyphosate, the world’s most widely used herbicide, has been linked to the activation of the stress response and changes in susceptibility to antibiotics. In this study,...
Sat, 11/21/2020 - 04:02
Plant cell cultures can be used to identify the metabolic degradation of pesticides in crops. Therefore, Brassica napus L., Glycine max (L.) Merr., Zea mays L. and Triticum aestivum L. were used to elucidate the metabolic degradation of the following pesticides: tebuconazole, flurtamone, fenhexamid, and metalaxyl-M. Callus cultures were treated with 10 μM of the named pesticides by passive...
Fri, 11/20/2020 - 00:00
Antibiotic resistance is one of the major current global health crises. Because of increasing contamination with antimicrobials, pesticides, and heavy metals, the aquatic environment has become a hotspot for emergence, maintenance, and dissemination of antibiotic and heavy metal resistance genes among bacteria. The aim of the present study was to determine the co-resistance to quinolones,...
Tue, 11/17/2020 - 02:02
In this study, a practical and excellent method was used to determine the famoxadone and cymoxanil via high-performance liquid chromatography equipped utilizing ultraviolet detector lamp (HPLC-UV) for investigating the dissipation behavior and residue distribution of famoxadone and cymoxanil in cucumber and soil ecosystem. The limit of quantification (LOQS) of famoxadone and cymoxanil in cucumber...
Sun, 11/15/2020 - 04:02
Organochlorine pesticides (OCPs), chemicals frequently used in agriculture, are a group of highly toxic and persistent organic pollutants. This study assesses the distribution and congener profiles of residual OCPs in 11 types of vegetable oils collected from Chinese markets. All samples were extracted using the modified QuEChERS method prior to analysis by gas chromatography–triple quadrupole...
Thu, 11/12/2020 - 02:02
The uptake of organic pollutants by agricultural plants and their accumulation in edible parts cause serious health problems to animals and humans. In this study, we used carbon-rich materials, such as biochar (BC), hydrochar (HC), and green compost (GC), to reduce the absorption and accumulation of three pesticides, imidacloprid (IMI), boscalid (BOS), and metribuzin (MET) and two endocrine...
Mon, 11/09/2020 - 02:03
A magnetic dispersive solid-phase microextraction procedure (MDμ-SPE) was developed to extract organophosphorus pesticides (OPP), including ethion, chlorpyrifos, diazinon, malathion, and fenitrothion, from vegetable samples before their analysis with gas chromatography/mass spectroscopy (GC/MS). Magnetic graphene@Fe3O4@SiO2@TiO2 nanocomposites were synthesized as a unique sorbent using the sol-...
Sun, 11/08/2020 - 22:21
The purpose of this study was to investigate the dietary effects of using essential oil from sour lemon peel (Citrus limon) on growth performance, carcass composition, blood and serum parameters, and liver enzymes of juvenile rainbow trout (Oncorhynchus mykiss) exposed to deltamethrin (DMN) pesticide. Treatments with no lemon peel essential oil (LPEO) and without DMN (control), as well as four...
Sun, 11/08/2020 - 04:03
A cleanup procedure based on hydrophobic magnetic nanoparticles for QuEChERS extraction followed by GC-MS method for the simultaneous determination of 16 organochlorine pesticides was developed. The type and amount of cleanup adsorbents (C18/GCB/Fe3O4/Fe3O4@Triton), the volume and polarity of the extraction solvent were optimized. The method was validated according to SANTE/11813/2017 and ICH/...
Sat, 11/07/2020 - 02:04
The use of compost extracts is steadily increasing, offering an attractive way for plant growth enhancement and disease management replacing chemical pesticides. In this study, potential mechanisms involved in plant growth promotion and suppressive activity against fungal diseases, of a compost extract produced from poultry manure/olive husk compost, were investigated. Results of physico-chemical...
Fri, 11/06/2020 - 04:03
Chitinases are the glycosyl hydrolase for catalyzing the degradation of chitin and play an indispensable role in bacterial pathogenesis, fungal cell wall remodeling, and insect molting. Thus, chitinases are attractive targets for therapeutic drugs and pesticides. Here, we present a strategy of developing a novel chemotype of chitinase inhibitors by the construction of planar heterocycles that can...
Thu, 11/05/2020 - 02:04
Anthropogenic interference the ecosystem unavoidably changes the physical and biological environment. The biodiversity of the Amazon region has been threatened by increased agricultural production and pesticide use. Considering that monitoring pesticides in environments close to their application is one of the ways to preserve the ecosystem, this study investigated the levels of pesticide...
Wed, 11/04/2020 - 22:14
Pesticides play a key role in agriculture and food production by controlling the insects, weeds, plant pathogens and microbial contaminations. Although they are useful in some aspects, their inappropriate application can induce health problems including carcinogenicity, reproductive toxicity, neurodegenerative diseases and disruption of endocrine system. In this respect, efficient strategies...
Wed, 11/04/2020 - 06:15
Author(s): Valentin Năstăsescu, Magdalena Mititelu, Marina Goumenou, Anca Oana Docea, Elisavet Renieri, Denisa Ioana Udeanu, Eliza Oprea, Andreea Letitia Arsene, Cristina Elena Dinu-Pîrvu, Manuela Ghica Cattle milk’s health benefits can be compromised by the presence of contaminants. The levels of cadmium, copper, lead and zinc, and residues of dichlorodiphenyldichloroethylene (DDE),...
Tue, 11/03/2020 - 06:31
Author(s): José L. Hidalgo-Ruiz, Roberto Romero-González, José Luis Martínez Vidal, Antonia Garrido Frenich A single method was developed for the determination of polar pesticides (fosetyl-Al aits metabolite, phosphonic acid and ethephon) and environmental contaminants (chlorate and perchlorate) in edible oils and nuts. Two extraction methods based on QuPPe-PO approach (Quick Polar Pesticides...
Sun, 11/01/2020 - 01:03
For the immense requirement on agriculture and animal husbandry, application of pesticides and veterinary drugs had become a normal state in the farming and ranching areas. However, to intently pursue the yields, large quantities of residues of pesticides and veterinary drugs have caused serious harm to both the environment and the food industry. To control and solve such an issue, a variety of...
Thu, 10/29/2020 - 06:31
Author(s): Zhenlan Xu, Lingxiangyu Li, Yi Xu, Shanshan Wang, Xiaoxia Zhang, Tao Tang, Jianzhong Yu, Huiyu Zhao, Shenggan Wu, Chunrong Zhang, Xueping Zhao Dendrobium officinale Kimura et Migo (D. officinale) is a dual-use plant with both botanical medicine and food applications, drawing increasing attentions. Pesticides are inevitably applied on D. officinale in commercial artificial-sheltered...
Wed, 10/28/2020 - 06:13
LWT
Author(s): Han Yeong Kaw, Xiangzi Jin, Yunan Liu, Long Cai, Xiangai Zhao, Juan Wang, John L. Zhou, Miao He, Donghao Li An effective sequential clean-up method by coupling gas-liquid microextraction (GLME) and magnetic-assisted dispersive solid phase extraction (d-SPE) termed as GLME-MA-d-SPE has been developed for multi-residue pesticide analysis in different fatty foods of animal origin. GLME is...
Wed, 10/28/2020 - 04:02
In this essay we investigate mainly 18 pesticide residues with different chemical structures in fresh vegetables, including organochlorine pesticides, organophosphorus pesticides, carbamate pesticides and pyrethroid pesticides. At the same time, it is estimated that the potential health risks for residents. A total of 313 samples were collected from 12 kinds of vegetables from Changchun, the...
Mon, 10/26/2020 - 22:18
The presence of chemical contaminant in alcoholic beverages is a widespread and notable problem with potential implications for human health. With the complexity and wide variation in the raw materials, production processes, and contact materials involved, there are a multitude of opportunities for a diverse host of undesirable compounds to make their way into the final product—some of which may...
Thu, 10/22/2020 - 06:32
Author(s): Soleyman Moinfar, Lazgin Abdi Jamil, Helan Zeyad Sami, Sorayya Ataei In this work, for the first time, low-density organic solvents were employed in continuous sample drop flow microextraction (CSDF-ME) by changing the design of extraction vessel. To examine the effectiveness of the modified extraction method, different organophosphorus pesticides (OPPs) were extracted using proposed...
Thu, 10/22/2020 - 06:32
Author(s): Farnaz Monajemzadeh, Ali Mohebbi, Mir Ali Farajzadeh, Mahboob Nemati, Mohammad Reza Afshar Mogaddam A new sample preparation method based on a magnetic effervescent tablet dispersive solid phase extraction combined with in syringe dispersive liquid-liquid microextraction has been developed and applied for the extraction of some pesticides and their related metabolites from egg samples...

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