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https://www.readbyqxmd.com/read/28110349/organochlorine-pesticides-in-gonad-brain-and-blood-of-mice-in-two-agricultural-areas-of-sinaloa
#1
Ernestina Perez-Gonzalez, Ulises-Giovanni Osuna-Martinez, Maria-Nancy Herrera-Moreno, Guadalupe-Durga Rodriguez-Meza, Hector-A Gonzalez-Ocampo, Marcos Bucio-Pacheco
The adverse effect of pesticides on non-target wildlife and human health is a primary concern in the world, but in Mexico, we do not know which wildlife species are at the greatest risk. The aim of this study was to determine organochlorine pesticides in mice of two agricultural fields in Sinaloa, Culiacan and Guasave. Procedures of extraction, analysis, and quantification were followed according to the modified EPA 8081b method. In three mouse tissues (gonad, brain, and blood), γBHC and decachlorobiphenyl with a frequency higher than 50% and endosulfan sulfate with 43% were observed...
January 21, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28110082/acute-larvicidal-toxicity-of-five-essential-oils-pinus-nigra-hyssopus-officinalis-satureja-montana-aloysia-citrodora-and-pelargonium-graveolens-against-the-filariasis-vector-culex-quinquefasciatus-synergistic-and-antagonistic-effects
#2
Giovanni Benelli, Roman Pavela, Angelo Canale, Kevin Cianfaglione, Giampiero Ciaschetti, Fabio Conti, Marcello Nicoletti, Sengottayan Senthil-Nathan, Heinz Mehlhorn, Filippo Maggi
Mosquito vector control is facing a number of important and timely challenges, mainly due to the rapid development of pesticide resistance and environmental concerns. In this scenario, screening of botanical resources for their mosquitocidal activity may offer effective and eco-friendly tools against Culicidae vectors. Culex quinquefasciatus Say (Diptera: Culicidae) is a vector of lymphatic filariasis and of dangerous arboviral diseases, such as West Nile and St. Louis encephalitis. In this study, the chemical composition of five essential oils obtained from different plants, namely Pinus nigra J...
January 18, 2017: Parasitology International
https://www.readbyqxmd.com/read/28110018/historical-records-and-sources-of-polycyclic-aromatic-hydrocarbons-pahs-and-organochlorine-pesticides-ocps-in-sediment-from-a-representative-plateau-lake-china
#3
Hezhog Yuan, Enfeng Liu, Enlou Zhang, Wenlei Luo, Liang Chen, Cheng Wang, Qi Lin
The PAH and OCP concentrations in sediment cores collected from a deep lake were measured and evaluated chronologically. The results indicated that the PAH and OCP concentrations significantly increased from the 1950s to the 1990s and subsequently decreased to recent years. Integrated molecular diagnostic ratios indicated that the predominant petrogenic sources occurred from the 1950s-1980s. Petroleum and fuel combustion dominated the source of contamination more recently as a result of energy structure changes in this region...
January 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28110013/dna-damage-and-translational-response-during-detoxification-from-copper-exposure-in-a-wild-population-of-chironomus-riparius
#4
Paola Bernabò, Matteo Gaglio, Francesco Bellamoli, Gabriella Viero, Valeria Lencioni
Copper is one of the predominant components of pesticides employed in agriculture and known to be highly toxic once it reaches aquatic organisms. The impact of sublethal concentrations of this metal on wild insects is not yet completely understood. Studies addressing alterations in different levels of gene expression are still lacking. We previously demonstrated that in a wild population of Chironomus riparius, HSP and CYP families of genes were up-regulated at the transcriptional level after copper exposure...
January 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28109940/proteome-response-of-fish-under-multiple-stress-exposure-effects-of-pesticide-mixtures-and-temperature-increase
#5
Allison Gandar, Pascal Laffaille, Nathalie Marty-Gasset, Didier Viala, Caroline Molette, Séverine Jean
Aquatic systems can be subjected to multiple stressors, including pollutant cocktails and elevated temperature. Evaluating the combined effects of these stressors on organisms is a great challenge in environmental sciences. To the best of our knowledge, this is the first study to assess the molecular stress response of an aquatic fish species subjected to individual and combined pesticide mixtures and increased temperatures. For that, goldfish (Carassius auratus) were acclimated to two different temperatures (22 and 32°C) for 15 days...
January 15, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28109841/disruption-of-aromatase-homeostasis-as-the-cause-of-a-multiplicity-of-ailments-a-comprehensive-review
#6
REVIEW
Seema Patel
Human health is beset with a legion of ailments, which is exacerbated by the lifestyle errors. Out of the numerous enzymes in human body, aromatase, a cytochromes P450 enzyme is particularly very critical. Occurring at the crossroads of multiple signalling pathways, its homeostasis is vital. Unfortunately, medications, hormone therapy, chemical additives in food, and endocrine-disrupting personal care products are oscillating the aromatase concentration beyond the permissible level. As this enzyme converts androgens (C19) into estrogens (C18), its agitation has different outcomes in different genders and age groups...
January 18, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28109771/assessment-of-learning-memory-and-attention-in-developmental-neurotoxicology-regulatory-testing-commentary-on-essentiality-of-cognitive-assessment-for-protecting-child-health
#7
Charles V Vorhees
This commentary is in response to the remarks of Drs. Christina Sobin, Mari Golub, and David Herr on the Special Issue of this Journal entitled "Assessment of Learning, Memory, and Attention in Developmental Neurotoxicology Regulatory Testing." I endorse the views expressed by Drs. Sobin, Golub, and Herr and add some discussion on a recent Organization on Economic Cooperation and Development (OECD) guideline, the Extended One Generation Reproductive Toxicology Guideline (OECD 446), in which testing for higher cognitive function (learning and memory) has been eliminated...
January 18, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28109710/univariate-predictors-of-maternal-concentrations-of-environmental-chemicals-the-mirec-study
#8
Antoine Lewin, Tye E Arbuckle, Mandy Fisher, Chun Lei Liang, Leonora Marro, Karelyn Davis, Nadia Abdelouahab, William D Fraser
BACKGROUND: The developing fetus and pregnant woman can be exposed to a variety of environmental chemicals that may adversely affect their health. Moreover, environmental exposure and risk disparities are associated with different social determinants, including socioeconomic status (SES) and demographic indicators. Our aim was to investigate whether and how maternal concentrations of a large panel of persistent and non-persistent environmental chemicals vary according to sociodemographic and lifestyle characteristics in a large pregnancy and birth cohort...
January 16, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28108915/microbial-changes-linked-to-the-accelerated-degradation-of-the-herbicide-atrazine-in-a-range-of-temperate-soils
#9
R L Yale, M Sapp, C J Sinclair, J W B Moir
Accelerated degradation is the increased breakdown of a pesticide upon its repeated application, which has consequences for the environmental fate of pesticides. The herbicide atrazine was repeatedly applied to soils previously untreated with s-triazines for >5 years. A single application of atrazine, at an agriculturally relevant concentration, was sufficient to induce its rapid dissipation. Soils, with a range of physico-chemical properties and agricultural histories, showed similar degradation kinetics, with the half-life of atrazine decreasing from an average of 25 days after the first application to <2 days after the second...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28108375/the-role-of-pattern-recognition-receptors-in-lung-sarcoidosis
#10
Esmaeil Mortaz, Ian M Adcock, Atefhe Abedini, Arda Kiani, Mehdi Kazempour-Dizaji, Masoud Movassaghi, Johan Garssen
Sarcoidosis is a granulomatous disorder of unknown etiology. Infection, genetic factors, autoimmunity and an aberrant innate immune system have been explored as potential causes of sarcoidosis. The etiology of sarcoidosis remains unknown, and it is thought that it might be caused by an infectious agent in a genetically predisposed, susceptible host. Inflammation results from recognition of evolutionarily conserved structures of pathogens (Pathogen-associated molecular patterns, PAMPs) and/or from reaction to tissue damage associated patterns (DAMPs) through recognition by a limited number of germ line-encoded pattern recognition receptors (PRRs)...
January 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28107986/dispersive-solid-phase-extraction-using-polyaniline-modified-zeolite-nay-as-a-new-sorbent-for-multiresidue-analysis-of-pesticides-in-food-and-environmental-samples
#11
Prapha Arnnok, Nopbhasinthu Patdhanagul, Rodjana Burakham
The applicability of polyaniline (PANI)-modified zeolite NaY as a sorbent for multi-class pesticides extraction was investigated. The sorbent had a sorption capacity of 833mgkg(-1) sorbent and preconcentration factor of 42 in the mixture of twenty pesticides. The PANI-coated zeolite NaY was successfully created via oxidative polymerization of aniline onto the surface of the zeolite. The sorbent was applied for dispersive solid phase extraction (DSPE) of commonly used pesticides belonging to five different chemical groups, involving carbamate, organophosphate, sulfonylurea, pyrethroid and neonicotinoid...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107942/stereoselective-quantification-of-triticonazole-in-vegetables-by-supercritical-fluid-chromatography
#12
Qi Tan, Jun Fan, Ruiqi Gao, Rujian He, Tai Wang, Yaomou Zhang, Weiguang Zhang
A highly fast analytical method though supercritical fluid chromatography (SFC) has been developed to quantify triticonazole enantiomers in cucumbers and tomatoes. Effects of organic modifier type and concentration on chiral separation and quantification of standard solution as well as matrix-matched standard solutions have been studied in detail. Among three organic modifiers, better separation of triticonazole racemate was achieved with 20% ethanol (v/v). The run time in SFC (ca 3min) with CO2-ethanol (80:20, v/v) as the mobile phase was six-fold shorter than HPLC analysis (about 18min)...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107935/tetraphasic-polar-organic-chemical-integrative-sampler-for-the-determination-of-a-wide-polarity-range-organic-pollutants-in-water-the-use-of-performance-reference-compounds-and-in-situ-calibration
#13
A Iparraguirre, A Prieto, A Vallejo, M Moeder, O Zuloaga, N Etxebarria, A Paschke
In the present work, a homemade polar organic chemical integrative sampler (POCIS) was studied for the determination of 16 target analytes. The suitability of the combination of triphasic mixture (used in so called pesticides-POCIS) and octadecyl-functionalized silica gel (C18) as sorbent for POCIS was evaluated for the determination of alkylphenols (APs), several hormones, bisphenol-A (BPA), synthetic musk fragrances and herbicides such as trifluralin (Tri) and alachlor (Ala). With this purpose, POCIS laboratory calibration study, using a continuous-flow calibration system, was carried out in order to determine the uptake behavior and sampling rate (Rs) values for each target analyte...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107862/neuroprotective-effect-of-spilanthes-acmella-murr-on-pesticide-induced-neuronal-cells-death
#14
Wilasinee Suwanjang, Bongkot Khongniam, Sujittra Srisung, Supaluk Prachayasittikul, Virapong Prachayasittikul
OBJECTIVE: To investigate protective effects of Spilanthes acmella (S. acmella) Murr. extracts against pesticide-induced neuronal cells death and to elucidate the underlying molecular mechanism in dopaminergic (SH-SY5Y) cells lines. METHODS: Cell viability of SH-SY5Y cells was studied by treating the cells with various concentration of pirimicarb for 24 h. Neuroprotective effect of S. acmella Murr. extracts was investigated by adding the plant extracts to the medium for 24 h prior to the incubation with 100 μM H2O2 or with pirimicarb for 24 h...
January 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28106327/evaluation-of-the-matrix-like-effect-in-multiresidue-pesticide-analysis-by-gas-chromatography-with-tandem-mass-spectrometry
#15
Kazuhiko Akutsu, Masato Yoshimitsu, Yoko Kitagawa, Satoshi Takatori, Naoki Fukui, Masakazu Osakada, Satoko Yamaguchi, Keiji Kajimura, Hirotaka Obana, Takaho Watanabe
In multiresidue pesticide analysis using gas chromatography, it has long been recognized that an increase in the number of pesticides present in a standard solution can result in an enhancement of the peak responses of certain pesticides. Despite being widely acknowledged, this phenomenon has been rarely studied and is poorly understood. In this study, the authors have tentatively called this phenomenon the "matrix-like effect" and demonstrated it clearly using gas chromatography with tandem mass spectrometry...
January 20, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28105594/screening-of-inorganic-and-organic-contaminants-in-floodwater-in-paddy-fields-of-hue-and-thanh-hoa-in-vietnam
#16
Ha Thu Trinh, Helle Marcussen, Hans Christian B Hansen, Giang Truong Le, Hanh Thi Duong, Nguyen Thuy Ta, Trung Quang Nguyen, Soren Hansen, Bjarne W Strobel
In the rainy season, rice growing areas in Vietnam often become flooded by up to 1.5 m water. The floodwater brings contaminants from cultivated areas, farms and villages to the rice fields resulting in widespread contamination. In 2012 and 2013, the inorganic and organic contaminants in floodwater was investigated in Thanh Hoa and Hue. Water samples were taken at 16 locations in canals, paddy fields and rivers before and during the flood. In total, 940 organic micro-pollutants in the water samples were determined simultaneously by GC-MS method with automatic identification and quantification system (AIQS), while ICP-MS was used for determination of ten trace elements in the samples...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28105564/occurrence-and-fate-of-pesticides-in-the-argentine-stretch-of-the-paraguay-paran%C3%A3-basin
#17
M A Etchegoyen, A E Ronco, P Almada, M Abelando, D J Marino
The Argentine stretch of the del Plata basin crosses regions devoted to extensive and intensive agriculture mostly with chemical pest control. The utilization of pesticides in the region has increased 900% in the last two decades associated with the introduction of biotech crops and direct-seeding techniques. Our objective was to study the occurrence, concentration, and fate of pesticides in surface water and bottom sediments of the principal tributaries and main watercourse of the Paraguay-Paraná River. We sampled 22 sites in the distal positions of the main affluents and main watercourse of the Paraná and report here results from two monitoring campaigns (2010-2012)...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28104477/enantioselective-oxidative-stress-and-oxidative-damage-caused-by-rac-%C3%A2-and-s-metolachlor-to-scenedesmus-obliquus
#18
Huijun Liu, YiLu Xia, Weidan Cai, Yina Zhang, Xiaoqiang Zhang, Shaoting Du
The rational use and environmental security of chiral pesticides has gained the interest of many researchers. The enantioselective effects of Rac- and S-metolachlor on oxidative stress in Scenedesmus obliquus were determined in this study. Stronger green fluorescence was observed in response to S-metolachlor treatment than to Rac-metolachlor treatment, suggesting that more reactive oxygen species (ROS) were stimulated by S-metolachlor. ROS levels following S-metolachlor treatment were 1.92-, 8.31-, and 1.08-times higher than those observed following Rac-metolachlor treatment at 0...
January 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28104330/evaluation-of-individual-and-combined-management-practices-to-reduce-the-off-site-transport-of-pesticides-from-golf-course-turf
#19
Pamela J Rice, Brian P Horgan, Jennifer L Hamlin
The detection of pesticides, associated with turfgrass management, in storm runoff and surface waters of urban watersheds has raised concerns regarding their source, potential environmental effects and a need for strategies to reduce their inputs. In previous research we discovered that hollow tine core cultivation (HTCC) was more effective than other management practices for reducing the off-site transport of pesticides with runoff from creeping bentgrass turf managed as a golf course fairway. This was primarily the result of enhanced infiltration and reduced runoff volumes associated with turf managed with hollow tines...
January 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28104237/one-step-green-synthesis-of-%C3%AE-cyclodextrin-iron-oxide-reduced-graphene-oxide-nanocomposite-with-high-supramolecular-recognition-capability-application-for-vortex-assisted-magnetic-solid-phase-extraction-of-organochlorine-pesticides-residue-from-honey-samples
#20
Shokouh Mahpishanian, Hassan Sereshti
In this research, β-cyclodextrin/iron oxide reduced graphene oxide hybrid nanostructure (β-CD/MRGO) with high water dispersability, excellent magnetic responsivity and molecular selectivity was prepared via a facile one step green strategy. The obtained nanomaterial was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, and vibrating sample magnetometry (VSM), which confirmed the modification of GO with β-CD and magnetic nanoparticles...
January 14, 2017: Journal of Chromatography. A
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