Pesticide residues

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Wed, 08/12/2020 - 06:16
Author(s): Changjian Li, Yunfei Xie, Yahui Guo, Yuliang Cheng, Hang Yu, He Qian, Weirong Yao The removal of pesticide residues from fruits reduces the risk of pesticide exposure in humans. In this study, carbosulfan and trichlorfon residues removed from apple using ozone-microbubble treatment (OMBT), tap water, hypochlorous acid-water, ozone-water, and microbubble-water. The pesticide removal...
Wed, 08/12/2020 - 06:14
Author(s): Md Mehedi Hassan, Muhammad Zareef, Tianhui Jiao, Shuangshuang Liu, Yi Xu, Annavaram Viswadevarayalu, Huanhuan Li, Quansheng Chen Trace detection of toxic chemicals in foodstuffs is of great concern in recent years. Surface-enhanced Raman scattering (SERS) has drawn significant attention in the monitoring of food safety due to its high sensitivity. This study synthesized signal...
Tue, 08/11/2020 - 06:23
Author(s): Jun Wang, Hui-Ling Duan, Li Fan, Jing Zhang, Zhi-Qi Zhang In order to meet the requirements of pesticide residues’ detection in complex matrix samples, the magnetic fluorinated multi-wall carbon nanotubes (M-F-MWCNTs) were prepared and applied as new QuEChERS clean-up materials. Combined with GC-MS, an improved QuEChERS method was successfully developed for the detection of...
Tue, 08/11/2020 - 04:02
Plant diseases caused by viruses and fungi have posed a serious threat to global agricultural production. The discovery of new leads based on natural products is an important way to innovate pesticides. In this work, natural product luotonin A was found to have good antiviral activity against tobacco mosaic virus (TMV) for the first time. A series of luotonin A derivatives were designed,...
Sat, 08/08/2020 - 02:02
The aim of this study was to investigate, analyze, and compare applied techniques suitable for achieving efficient removal of organophosphorus pesticides (OPPs) (malathion and fenitrothion) from aqueous solutions and analyze the degradation products and processes. Pesticide degradation efficiency (%) was monitored by high-performance liquid chromatography (HPLC) equipped with a photodiode array...
Thu, 08/06/2020 - 06:24
Author(s): Shan Wang, Jiayi Wang, Chen Li, Yaping Xu, Zhaoxia Wu Since the beginning of the widespread use of pesticides, their removal from food has become a serious concern. In this study, the removal of residual pesticides (malathion and carbosulfan) from pak choi via treatment with ozonated water was investigated. Under the optimal treatment conditions, i.e., 2.0 mg/L ozonated water and a...
Tue, 07/28/2020 - 14:06
Agricultural commodities are generally consumed as processed food. Therefore, it is indispensable to assess pesticide residues in processed products rather than only in the raw agricultural commodity, in order to approach a more realistic scenario of dietary exposure. Processing factors are important tools for dietary exposure risk assessments. In this study, processing factors for the baking...
Tue, 07/28/2020 - 06:16
Author(s): Sufang Fan, Junmei Ma, Meirong Cao, Juan Wang, Leilei Zhang, Yan Zhang, Qiang Li, Jia Chen In this experiment, a liquid chromatography tandem mass spectrometry method was built to determine 15 pesticide residues in Chinese cabbage and cucumber samples based on online turbulent flow chromatography purification. After modified quick, easy, cheap, effective, rugged, and safe (QuEChERS)...
Sun, 07/26/2020 - 06:10
Author(s): Jia Wang, Yi Yang, Ying Huang, Xiao Zhang, Yu Huang, Wei C. Qin, Yang Wen, Yuan H. Zhao Agricultural pesticides serve as effective controls of unwanted weeds and pests. However, these same chemicals can exert toxic effects in non-target organisms. To determine chemical modes of action, the toxicity ratio (TR) and critical body residues (CBRs) of 57 pesticides were calculated for...
Sun, 07/26/2020 - 02:02
Degradation-resistant chemical contaminants of health concern such as dichlorodiphenyltrichloroethane (DDT) pesticides and polychlorinated biphenyls (PCBs) in the environment are redistributed between different environmental compartments, where they partition between biotic heterotrophic routes and abiotic features (water and immobile soil components). Their fate and the potential risk they pose...
Fri, 07/24/2020 - 02:02
Pentachlorophenol (PCP), commonly used as a wood preservative, pesticide, and fungicide, is the most toxic of all chlorophenols and can accumulate in living organisms. It is of great significance to construct a sensitive method for the detection of PCP in real samples. In this study, a simple, novel, and sensitive electrochemical sensor for pentachlorophenol (PCP) was constructed by modifying...
Thu, 07/23/2020 - 22:14
A sample pretreatment method based on the combination of a three‐phase solvent extraction system and deep eutectic solvent‐based dispersive liquid–liquid microextraction has been introduced for the extraction of four organochlorine pesticides in cocoa samples before their determination by gas chromatography–electron capture detection. A mixture of sodium chloride, acetonitrile, and potassium...
Wed, 07/22/2020 - 14:05
Processing Factors (PFs) reflect the concentration or dilution of pesticide residues resulting from food processing. PFs are key elements to demonstrate the compliance of processed foods with Maximum residue levels (MRLs) as set by Regulation 396/2005. While efforts have been made by the European Food Safety Authority (EFSA) and by national authorities to compile PFs from processing studies, such...
Tue, 07/21/2020 - 16:00
Fusarium graminearum is a phytopathogenic fungus that causes Fusarium head blight in small-grain cereals, such as wheat, with significant yield reductions. Moreover, it contaminates the cereal grains with health-threatening mycotoxins, such as deoxynivalenol (DON), jeopardizing food and feed safety. Plant-based biopesticides, i.e. botanicals, have recently gained increased interest in crop...
Thu, 07/16/2020 - 08:02
by Jones A. Kapeleka, Elingarami Sauli, Omowunmi Sadik, Patrick A. Ndakidemi This study was carried out to investigate the risks of simultaneous exposure to pesticide residues and bacteria contaminants in locally produced fresh vegetables and vegetables in Tanzania. A total of 613 samples were analyzed for pesticide residues, out of which 250 were also analyzed for bacterial contamination....
Wed, 07/15/2020 - 02:02
The main objective of this research was to study the feasibility of using algal and algal-activated sludge systems in treating laundry wastewater. Three different types of systems—green microalgae (system A), diatoms + activated sludge (system B), and green microalgae + activated sludge (system C)—were studied at six different solid retention times (SRT)—6, 8, 10, 12, 14, and 16 days—to evaluate...
Mon, 07/13/2020 - 02:03
Abstract Insect and mite pests are damaging stressors that are threatening the cultivation of tea plants, which result in enormous crop loss. Over the years, the effectiveness of synthetic pesticides has allowed for its prominent application as a control strategy. However, the adverse effects of synthetic pesticides in terms of pesticide residue, environmental contamination and insect pest...
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...
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....
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...
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 - 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...
Wed, 07/01/2020 - 02:02
In this study, a combination of modified quick easy cheap effective rugged and safe extraction (QuEChERS) and dispersive liquid–liquid microextraction (DLLME) has been proposed for the extraction and preconcentration of multiclass pesticide residues from yogurt samples prior to their determination by fast gas chromatography–mass spectrometry. Factors influencing DLLME efficiency, including type...
Tue, 06/30/2020 - 22:11
BACKGROUND Iprodione is considered to be an endocrine‐disturbing pesticide, which could harm consumers. The garlic crop has three edible parts: the garlic, the green garlic, and the garlic shoot, which correspond to different stages of its growth. In this study, iprodione residue dissipation and distribution in these three edible parts were investigated, and dietary risk was evaluated. RESULTS...
Sun, 06/28/2020 - 04:03
A series of novel α-ketoamide derivatives bearing a vanillin skeleton were designed and synthesized. Bioactivity tests on virus and bacteria were performed. The results indicated that some compounds exhibited excellent antitobacco mosaic virus (TMV) activities, such as compound 34 exhibited an inactivation activity of 90.1% and curative activity of 51.8% and compound 28 exhibited a curative...
Thu, 06/25/2020 - 16:00
In the present study, we conducted field surveys to detect the population density of the most important invasive weed species and their associated virus vectoring aphids in crops grown under high input field (HIF) vs. low-input field (LIF) conditions, with and without fertilizers and pesticides. The most frequent invasive weed species were annual fleabane, Erigeron annua (L.), Canadian horseweed...
Tue, 06/23/2020 - 14:05
This study was carried out to assess the exposure to pesticide residues from vegetable consumption of residents in Seoul using data on pesticide residue concentrations and the quantity of vegetables consumed. A total of 34,520 samples of 96 types of vegetables collected from 2010 to 2014 by the Seoul Metropolitan Government Institute of Health and Environment (SIHE) were analysed for 283...
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...
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...
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 - 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 - 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...
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...
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 - 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...
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...
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...
Wed, 06/10/2020 - 22:17
Two medicinal plants, African Locust Bean (Parkia biglobosa) and Lonicera japonica, traditionally used in West Africa and China were investigated against four spoilage microorganisms: Bacillus subtilis, Cronobacter dublinensis, Pantoea agglomerans, and Bacillus sp., isolated from mulberry fruit. The aqueous extract of the P. biglobosa (ALB) was potent with average inhibitory zones against four...
Wed, 06/10/2020 - 22:13
Background Pyraclostrobin and picoxystrobin are two representative pesticides of strobilurins used to treat cucumber downy mildew, which have raised issues of food safety and human health. A new formulation containing these two compounds is being prepared for marketing in China. Results The dissipation and residual levels of pyraclostrobin and picoxystrobin in cucumbers under field conditions...
Wed, 06/10/2020 - 14:05
A large number of pesticides used in agricultural practice has been characterized or suspected to be Endocrine Disruptors, with dietary intake to be the major route of consumer’s exposure. In the present study the safety to consumer after the consumption of pome fruits and fruiting vegetables originated from the area of Thessaly, Central Greece was assessed. Objective samplings of 110 samples...
Tue, 06/09/2020 - 04:05
In this work, a new mega-method of sample preparation called “QuEChERSER” (more than QuEChERS) is being presented for the first time. Fast, efficient, and cost-effective analysis of chemical contaminants in meat is useful for international trade, domestic monitoring, risk assessment, and other purposes. The goal of this study was to develop and validate a simple high-throughput mega-method for...
Tue, 06/09/2020 - 04:05
The goal of this study was to develop and validate a new method for simultaneous determination of 106 veterinary drugs and 227 pesticides and their metabolites plus 16 polychlorinated biphenyls (PCBs) at and below their regulatory levels established for catfish muscle in the European Union and U.S.A. To do this, two different QuEChERS-based methods for veterinary drugs and pesticides and PCBs...
Sun, 06/07/2020 - 22:15
Infant formulas are manufactured products to meet specific nutritional requirements for infants. However, infant formulas can contain harmful substances, such as chemical contaminants and residues, normally due to possible contamination of the raw material or from the production chain. Some studies have demonstrated that veterinary drugs, pesticides, mycotoxins, heavy metals, packaging materials...
Fri, 06/05/2020 - 22:11
ABSTRACT Background Fluopyram is a pesticide widely used in tomato and cucumber crops cultivation to control fungal diseases that develop especially in environments with moderate temperatures and high humidity, such as in a greenhouse. The pathway of fluopyram dissipation has been monitored in cucumber and cherry tomato under greenhouse conditions. Results In the greenhouse trials, cherry tomato...
Fri, 06/05/2020 - 14:06
An LC-MS/MS multi-residue method was validated for the determination of 59 pesticide residue levels in a chicken egg by using QuEChERS extraction method. The validation parameters used were taken from the SANTE/11813/2017 guideline. The calibration curves for each target pesticide had a good linearity in a range of 1.0 or 2.5 to 100.0 µg kg−1 (r2 ≥ 0.995). Ten per cent of the total pesticides had...
Fri, 06/05/2020 - 03:38
Malathion is an organophosphate pesticide widely used for agricultural crops and for vector control of Aedes aegypti. Humans are exposed to this environmental contaminant by ingesting contaminated food. The juvenile and peripubertal periods are critical for the postnatal development of the epididymis and are when animals are most vulnerable to toxic agents. Since juveniles and adolescents are...

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