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https://www.readbyqxmd.com/read/28528414/tissue-contaminant-burdens-in-san-francisco-estuary-white-sturgeon-acipenser-transmontanus-implications-for-population-recovery
#1
Deke T Gundersen, Steven C Zeug, Robert B Bringolf, Joseph Merz, Zachary Jackson, Molly A H Webb
The San Francisco Estuary (SFE) is heavily influenced by anthropogenic activities, including historic and chronic contaminant inputs. These contaminants can adversely affect SFE fish populations, particularly white sturgeon, because they are a benthic dwelling, long-lived species. We measured a suite of metals and organic contaminants in liver and gonad tissues of 25 male and 32 female white sturgeon as well as several physiological indicators of sturgeon health. Most sturgeon (68% of males and 83% of females) were estimated to be between 13 and 17 years of age...
May 20, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28525872/levels-and-temporal-trends-of-organochlorine-contaminants-in-mussels-from-spanish-mediterranean-waters
#2
Juan A Campillo, Beatriz Fernández, Víctor García, José Benedicto, Víctor M León
The levels and trends of organochlorine contaminants were determined along the Spanish Mediterranean coast from 2000 to 2013 using mussel, Mytilus galloprovincialis, as bioindicator species. The highest levels of PCBs and DDTs were found at industrial and urban locations, and at areas under the influence of the mouth of major rivers. Dieldrin and t-NNC were commonly detected, while HCHs, aldrin, isodrin, endrin and HCB were at levels not detectable at many areas. Significant declines on the levels of DDTs were observed at most of the areas studied...
May 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28522354/corrigendum-to-differential-effects-of-the-persistent-ddt-metabolite-methylsulfonyl-dde-in-nonstimulated-and-lh-stimulated-neonatal-porcine-leydig-cells-toxicology-and-applied-pharmacology-267-2013-247-255
#3
Cesilie Granum Castellanos, Irene Beate Sørvik, Marte Bruu Tanum, Steven Verhaegen, Ingvar Brandt, Erik Ropstad
No abstract text is available yet for this article.
May 15, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28490090/effects-of-pan-cooking-on-micropollutants-in-meat
#4
Christelle Planche, Jérémy Ratel, Patrick Blinet, Frédéric Mercier, Magaly Angénieux, Claude Chafey, Julie Zinck, Nathalie Marchond, Sylvie Chevolleau, Philippe Marchand, Gaud Dervilly-Pinel, Thierry Guérin, Laurent Debrauwer, Erwan Engel
This work presents the effects of pan cooking on PCBs, PCDD/Fs, pesticides and trace elements in meat from a risk assessment perspective. Three different realistic cooking intensities were studied. A GC×GC-TOF/MS method was set up for the multiresidue analysis of 189 PCBs, 17 PCDD/Fs and 16 pesticides whereas Cd, As, Pb and Hg were assayed by ICP-MS. In terms of quantity, average PCB losses after cooking were 18±5% for rare, 30±3% for medium, and 48±2% for well-done meat. In contrast, average PCDD/F losses were not significant...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28483709/exposure-to-ddt-and-its-metabolites-from-khat-catha-edulis-chewing-consumers-risk-assessment-from-southwestern-ethiopia
#5
Seblework Mekonen, Argaw Ambelu, Belay Negassa, Pieter Spanoghe
Khat (Catha edulis) is one of the most consumed plant in the horn of African countries. However, it is a stimulant plant that has several side effects on the health of consumers. On top of that, the khat leaves used for human consumption are often contain contaminants such as pesticide residues. The present study aims to investigate the level of DDT residue and its metabolites (p'p-DDE, p'p-DDD, o'p-DDT and p'p-DDT) in khat samples and to undertake exposure assessment to consumers. The khat samples were collected from local markets in southwestern Ethiopia...
May 5, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28482294/association-between-fish-consumption-dietary-omega-3-fatty-acids-and-persistent-organic-pollutants-intake-and-type-2-diabetes-in-18-first-nations-in-ontario-canada
#6
Lesya Marushka, Malek Batal, William David, Harold Schwartz, Amy Ing, Karen Fediuk, Donald Sharp, Andrew Black, Constantine Tikhonov, Hing Man Chan
BACKGROUND: First Nations (FNs) populations in Canada experience a disproportionally higher rate of obesity and type 2 diabetes (T2D) compared to the general population. Recent data suggest that a high consumption of fish may help prevent T2D. On the other hand, fish might also be a potential source of environmental contaminants which could potentially be a risk factor for T2D. OBJECTIVE: To investigate the potential associations between self-reported T2D and consumption of locally-harvested fish, dietary long-chain omega-3 fatty acids (n-3FAs) and persistent organic pollutants intake among adult FNs living on reserve in Ontario...
May 5, 2017: Environmental Research
https://www.readbyqxmd.com/read/28482040/transposition-of-mutator-like-transposable-elements-mules-resembles-hat-and-transib-elements-and-v-d-j-recombination
#7
Kun Liu, Susan R Wessler
Mutator-like transposable elements (MULEs) are widespread across fungal, plant and animal species. Despite their abundance and importance as genetic tools in plants, the transposition mechanism of the MULE superfamily was previously unknown. Discovery of the Muta1 element from Aedes aegypti and its successful transposition in yeast facilitated the characterization of key steps in Muta1 transposition. Here we show that purified transposase binds specifically to the Muta1 ends and catalyzes excision through double strand breaks (DSB) and the joining of newly excised transposon ends with target DNA...
May 8, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28476008/breast-milk-intake-and-mother-to-infant-pesticide-transfer-measured-by-deuterium-oxide-dilution-in-agricultural-and-urban-areas-of-mexico
#8
Ana Teresa Limon-Miro, Maria Lourdes Aldana-Madrid, Gerardo Alvarez-Hernandez, Lesley Evelyn Antunez-Roman, Guillermo Rodriguez-Olibarria, Mauro E Valencia Juillerat
Vector-borne diseases have increased pesticide use in urban areas (UA) and agricultural areas (AA) in Mexico. Breast milk can be contaminated by pesticide exposure. The objective of the study was to measure breast milk intake by deuterium oxide dilution as well as organochlorine and pyrethroid transfer from mother to infant in AA and UA of Sonora, Mexico. Human milk intake was determined by the 'dose-to-mother' technique using deuterium oxide (D2O) dilution. Mothers' body composition was also assessed by this technique and the intercept method...
April 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/28463822/organochlorine-pesticides-and-polychlorinated-biphenyls-in-human-adipose-tissue-from-northern-tunisia-current-extent-of-contamination-and-contributions-of-socio-demographic-characteristics-and-dietary-habits
#9
Amani Achour, Abdelkader Derouiche, Badreddine Barhoumi, Badreddine Kort, Driss Cherif, Sondes Bouabdallah, Mohsen Sakly, Khémais Ben Rhouma, Soufiane Touil, Mohamed Ridha Driss, Olfa Tebourbi
The aims of the present study were to investigate the current exposure levels of persistent organochlorine compounds (OCs) in adipose tissues intraoperatively collected from 40 patients over 20 years undergoing non-cancer-related surgery residing in Northern region of Tunisia (Bizerte), which constitutes an exemplary case, and examined association between levels of contamination and both socio-demographic characteristics and dietary habits. Concentration of hexachlorobenzene (HCB), hexachlorocyclohexane isomers (α-HCH, β-HCH, γ-HCH and δ-HCH), dichlorodiphenyltrichloroethane isomers (p,p'-DDT and o,p'-DDT) and metabolites (p,p'-DDE, o,p'-DDE, p,p'-DDD and o,p'-DDD) and 12 polychlorinated biphenyls (PCBs) congeners were measured using capillary gas chromatography with electron capture detector...
April 27, 2017: Environmental Research
https://www.readbyqxmd.com/read/28460875/persistent-organochlorine-residues-in-fish-and-sediments-collected-from-eastern-aegean-coast-levels-occurrence-and-ecological-risk
#10
Shareef K I Muzyed, Filiz Kucuksezgin, Nalan Tuzmen
Organochlorines were determined in fish and sediment collected from Izmir and Çandarlı Bays. The results indicated that ΣCyclodiens were generally predominant contaminants. In all samples, p,p'-DDE was the predominant DDT congener. Aroclors were found in noticeably higher levels than OCPs in sediment and the highest levels of Aroclors, OCPs were found in Nemrut which can be attributed to industrial activities. According to Sediment Quality Guidelines, DDTs were lower than the values that may cause adverse biological risk in sediment samples...
April 28, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28460236/trophic-ecology-drives-contaminant-concentrations-within-a-tropical-seabird-community
#11
Manrico Sebastiano, Paco Bustamante, Igor Eulaers, Govindan Malarvannan, Paula Mendez-Fernandez, Carine Churlaud, Pierre Blévin, Antoine Hauselmann, Adrian Covaci, Marcel Eens, David Costantini, Olivier Chastel
To support environmental management programs, there is an urgent need to know about the presence and understand the dynamics of major contaminants in seabird communities of key marine ecosystems. In this study, we investigated the concentrations and trophodynamics of trace elements in six seabird species and persistent organic pollutants (POPs) in three seabird species breeding on Grand Connétable Island (French Guiana), an area where the increase in human population and mining activities has raised concerns in recent years...
April 28, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28456124/serum-levels-of-organochlorine-pesticides-in-blood-donors-a-biomonitoring-survey-in-the-north-of-brazil-2010-2011
#12
Carmen Freire, Rosalina Jorge Koifman, Sergio Koifman
Data on exposure to organochlorine (OC) pesticides in the Brazilian population are lacking. The purpose of this study was to investigate the distribution of serum levels of OC pesticides in Brazilian blood donors and to determine factors potentially influencing exposure levels. To conduct this biomonitoring survey, blood samples were collected from blood donors attending the Hematherapic Unit in Rio Branco, North of Brazil, in 2010-2011. A total of 1183 (99%) subjects answered to a questionnaire including information on sociodemographics, lifestyle, and dietary habits...
April 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28454037/agricultural-expansion-as-risk-to-endangered-wildlife-pesticide-exposure-in-wild-chimpanzees-and-baboons-displaying-facial-dysplasia
#13
Sabrina Krief, Philippe Berny, Francis Gumisiriza, Régine Gross, Barbara Demeneix, Jean Baptiste Fini, Colin A Chapman, Lauren J Chapman, Andrew Seguya, John Wasswa
Prenatal exposure to environmental endocrine disruptors can affect development and induce irreversible abnormalities in both humans and wildlife. The northern part of Kibale National Park, a mid-altitude rainforest in western Uganda, is largely surrounded by industrial tea plantations and wildlife using this area (Sebitoli) must cope with proximity to human populations and their activities. The chimpanzees and baboons in this area raid crops (primarily maize) in neighboring gardens. Sixteen young individuals of the 66 chimpanzees monitored (25%) exhibit abnormalities including reduced nostrils, cleft lip, limb deformities, reproductive problems and hypopigmentation...
April 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28451741/the-rag-transposon-is-active-through-the-deuterostome-evolution-and-domesticated-in-jawed-vertebrates
#14
Jose Ricardo Morales Poole, Sheng Feng Huang, Anlong Xu, Justine Bayet, Pierre Pontarotti
RAG1 and RAG2 are essential subunits of the V(D)J recombinase required for the generation of the variability of antibodies and T cell receptors in jawed vertebrates. It was demonstrated that the amphioxus homologue of RAG1-RAG2 is encoded in an active transposon, belonging to the transposase DDE superfamily. The data provided support the possibility that the RAG transposon has been active through the deuterostome evolution and is still active in several lineages. The RAG transposon corresponds to several families present in deuterostomes...
April 28, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28448812/effect-of-exposure-to-p-p%C3%A2-dde-during-the-first-half-of-pregnancy-in-the-maternal-thyroid-profile-of-female-residents-in-a-mexican-floriculture-area
#15
José Ángel Hernández-Mariano, Luisa Torres-Sánchez, Susana Bassol-Mayagoitia, Maria Consuelo Escamilla-Nuñez, Mariano E Cebrian, Érika Adriana Villeda-Gutiérrez, Guadalupe López-Rodríguez, Eunice Elizabeth Félix-Arellano, Julia Blanco-Muñoz
BACKGROUND: Dichlorodiphenyldichloroethene (p,p´-DDE), the main metabolite of dichlorodiphenyltrichloroethane (DDT), has been associated with changes in human thyroid hormone levels. Maternal thyroid hormones are essential for adequate fetal neurodevelopment during the first half of pregnancy. OBJECTIVE: To evaluate the association between maternal p,p´-DDE concentration and the maternal thyroid profile during the first half of pregnancy. MATERIALS AND METHODS: We analyzed the information of 430 pregnant women from a Mexican floriculture area, with a gestational age ≤16 weeks...
April 24, 2017: Environmental Research
https://www.readbyqxmd.com/read/28446695/breaking-the-cipher-ant-eavesdropping-on-the-variational-trail-pheromone-of-its-termite-prey
#16
Xiao-Lan Wen, Ping Wen, Cecilia A L Dahlsjö, David Sillam-Dussès, Jan Šobotník
Predators may eavesdrop on their prey using innate signals of varying nature. In regards to social prey, most of the prey signals are derived from social communication and may therefore be highly complex. The most efficient predators select signals that provide the highest benefits. Here, we showed the use of eusocial prey signals by the termite-raiding ant Odontoponera transversaO. transversa selected the trail pheromone of termites as kairomone in several species of fungus-growing termites (Termitidae: Macrotermitinae: Odontotermes yunnanensis, Macrotermes yunnanensis, Ancistrotermes dimorphus)...
April 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28437004/4-4-dichlorodiphenyltrichloroethane-ddt-and-4-4-dichlorodiphenyldichloroethylene-dde-inhibit-myogenesis-in-c2c12-myoblasts
#17
Jonggun Kim, Min Young Park, Yoo Kim, Kyong Sup Yoon, John Marshall Clark, Yeonhwa Park, Kwang-Youn Whang
BACKGROUND: Most countries have banned the use of 4,4'-Dichlorodiphenyltrichloroethane (DDT). However, due to its extremely high lipophilic characteristics, DDT and its metabolite 4,4'-dichlorodiphenyldichloroethylene (DDE) are ubiquitous in the environment and in many types of food. The positive correlation between exposure to insecticides, including DDT and DDE, and weight gain, resulting in impaired energy metabolism in offspring following perinatal DDT and DDE exposure was previously reported...
April 24, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28434213/evaluation-of-the-synergistic-effect-of-mixed-cultures-of-white-rot-fungus-pleurotus-ostreatus-and-biosurfactant-producing-bacteria-on-ddt-biodegradation
#18
Adi Setyo Purnomo, Khoirul Ashari, Farizha Triyogi Hermansyah
DDT (1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane) is one of the organic synthetic pesticides that has many negative effects for human health and the environment. The purpose of this study was to investigate the synergistic effect of mixed cutures of white-rot fungus, Pleurotus ostreatus, and biosurfactant-producing bacteria, Pseudomonas aeruginosa and Bacillus subtilis, on DDT biodegradation. Bacteria was added into P. ostreatus culture (mycelial wet weight on average by 8.53 g) in concentrations of 1, 3, 5, and 10 mL (1 mL ≈ 1...
April 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28434068/assessment-of-ddt-and-metabolites-in-soil-and-sediment-of-potentially-contaminated-areas-of-bel%C3%A3-m-amazon-region-brazil
#19
Andreia Oliveira Rodrigues, Larissa Costa de Souza, Cássia Christina da Silva Rocha, Amilton Cesar Gomes da Costa, Rosivaldo de Alcântara Mendes
The aim of this study was to evaluate the distribution of DDT and metabolites in surface soils and soil profiles from two areas containing deposits of obsolete pesticides in Belém, Amazon Region, Brazil. DDT and metabolites were extracted by microwave assisted extraction and analyzed by gas chromatography with electron capture detection. Concentrations of total DDT in surface soil samples ranged from 64.22 mg kg(-1) in area 1 (A1) to 447.84 mg kg(-1) in area 2 (A2). Lower levels were found in soil profiles than at the surface (6...
April 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28432879/seasonal-variation-and-health-risk-assessment-of-organochlorine-compounds-in-urban-soils-of-novi-sad-serbia
#20
Biljana D Škrbić, Vesna Marinković, Igor Antić, Anita Petrović Gegić
The aim of this paper was to determine spatial and seasonal variation of 6 indicator polychlorinated biphenyls (PCBs) and 18 organochlorine pesticides (OCPs) in urban soils of Novi Sad, Serbia. Sixty surface soil samples were collected during both winter and summer season, from different types of locations: schools, recreational areas, residential and industrial zones. Samples were treated using the method of accelerated solvent extraction, which allows simultaneous extraction and clean up of PCBs and OCPs...
April 15, 2017: Chemosphere
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