keyword
MENU ▼
Read by QxMD icon Read
search

DDE

keyword
https://www.readbyqxmd.com/read/29455352/electrokinetic-fenton-remediation-of-organochlorine-pesticides-from-historically-polluted-soil
#1
Maofei Ni, Shulei Tian, Qifei Huang, Yanmei Yang
Soil contamination by persistent organic pollutants (POPs) poses a great threat to historically polluted soil worldwide. In this study, soils were characterized, and organochlorine pesticides contained in the soils were identified and quantified. Individual electrokinetic (IE), EK-Fenton-coupled technologies (EF), and enhanced EK-Fenton treatment (E-1, E-2, and E-3) were applied to remediate soils contaminated with hexachloro-cyclohexane soprocide (HCH) and dichloro-diphenyl-trichloroethane (DDT). Variation of pH, electrical conductivity, and electroosmotic flow was evaluated during the EK-Fenton process...
February 17, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29440724/magnetic-resonance-temporal-diffusion-tensor-spectroscopy-of-disordered-anisotropic-tissue
#2
Jonathan Scharff Nielsen, Tim B Dyrby, Henrik Lundell
Molecular diffusion measured with diffusion weighted MRI (DWI) offers a probe for tissue microstructure. However, inferring microstructural properties from conventional DWI data is a complex inverse problem and has to account for heterogeneity in sizes, shapes and orientations of the tissue compartments contained within an imaging voxel. Alternative experimental means for disentangling the signal signatures of such features could provide a stronger link between the data and its interpretation. Double diffusion encoding (DDE) offers the possibility to factor out variation in compartment shapes from orientational dispersion of anisotropic domains by measuring the correlation between diffusivity in multiple directions...
February 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29426206/first-results-on-zooplankton-community-composition-and-contamination-by-some-persistent-organic-pollutants-in-the-gulf-of-tadjoura-djibouti
#3
G Boldrocchi, Y Moussa Omar, D Rowat, R Bettinetti
The Gulf of Tadjoura is located in the Horn of Africa and is widely recognized as an important site where the zooplanktivorous whale sharks seasonally aggregate from October to February. The surface zooplankton community (0-3m) was weekly sampled from November 2016 to February 2017 in two sites during the whale shark aggregation period. A total of 12 phyla were identified. Copepoda represented the most abundant and diverse group with 29 different genera, and contributed with an average of 82% of the mean zooplankton density of approximately 6600indm-3...
February 2, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29421736/associations-between-ddt-and-egg-parameters-of-the-house-sparrow-passer-domesticus-from-the-thohoyandou-area-of-south-africa
#4
L Steyn, H Bouwman, J N Maina
This study investigated whether the pesticide DDT (Dichlorodiphenyltrichloroethane) and its metabolites, DDE (Dichlorodiphenyldichloroethylene) and DDD (Dichlorobischlorophenylethane) were associated with adverse effects on multiple endpoints of the eggs of House Sparrows from the Thohoyandou area in South Africa, where DDT is used for malaria control. Eggshell thickness, pore numbers, pore shapes, and volume densities of the pores were measured to test possible adverse effects. Analysis was done using a scanning electron microscope and the concentrations of the pesticides were determined with the aid of gas chromatography-mass spectrometry...
February 2, 2018: Chemosphere
https://www.readbyqxmd.com/read/29421401/association-between-prenatal-exposure-to-multiple-insecticides-and-child-body-weight-and-body-composition-in-the-vhembe-south-african-birth-cohort
#5
Eric Coker, Jonathan Chevrier, Stephen Rauch, Asa Bradman, Muvhulawa Obida, Madelein Crause, Riana Bornman, Brenda Eskenazi
BACKGROUND: Pregnant women may be co-exposed to multiple insecticides in regions where both pyrethroids and dichlorodiphenyltrichloroethane (DDT) are used for indoor residual spraying (IRS) for malaria control. Despite the potential for adverse effects on offspring, there are few studies in areas where IRS is currently used and little is known about the effects of pyrethroids on children's health. METHODS: We investigated the relationship between concentrations of four urinary pyrethroid metabolites in urine and organochlorine pesticide concentrations in maternal blood collected near delivery on body weight and body composition among children ≤2 years old participating in the prospective South Africa VHEMBE birth cohort (N = 708)...
February 1, 2018: Environment International
https://www.readbyqxmd.com/read/29421399/high-plasma-organochlorine-pesticide-levels-are-related-to-increased-biological-age-as-calculated-by-dna-methylation-analysis
#6
P Monica Lind, Samira Salihovic, Lars Lind
BACKGROUND: Organochlorine pesticides (OCPs) have been shown in the experimental setting to alter DNA methylation. Since DNA methylation changes during the life-span, formulas have been presented to calculate "DNA methylation age" as a measure of biological age. OBJECTIVES: We aimed to investigate if circulating levels of three OCPs were related to increased DNA methylation age METHODS: 71CpG DNA methylation age (Hannum formula) was calculated based on data from the Illumina 450 k Bead Methylation chip in 1000 subjects in the Prospective Study of the Vasculature in Uppsala Seniors (PIVUS) study (50% women, all aged 70 years at the examination)...
February 1, 2018: Environment International
https://www.readbyqxmd.com/read/29421116/organochlorine-pesticides-in-surface-waters-from-reloncav%C3%A3-fjord-and-the-inner-sea-of-chilo%C3%A3-39-5%C3%A2-s-43%C3%A2-s-chilean-patagonia
#7
Juan A Placencia, Sergio Contreras
Surface water samples from the environmental continuum spanning rivers (Petrohue, Cochamo, Puelo), fjord (Reloncaví), and the inner sea of Chiloé in Chilean Patagonia were analyzed to estimate concentration and distribution of dissolved Organochlorine pesticides (OCPs). High concentrations of HCHs, DDTs and endosulfan found in surface waters from rivers suggest that rivers are the major source of dissolved OCPs to coastal marine ecosystems. We interpret variations in the distribution and concentration as an apparent oscillation between rain and snow-scavenging processes that might determine the type of OCPs that can be preferentially deposited on mountains, glaciers, rivers, estuaries, and finally transferred to the marine realm...
January 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29407826/activated-carbon-as-a-means-of-limiting-bioaccumulation-of-organochlorine-pesticides-triclosan-triclocarban-and-fipronil-from-sediments-rich-in-organic-matter
#8
Viet D Dang, Kevin J Kroll, Samuel D Supowit, Rolf U Halden, Nancy D Denslow
Addition of activated carbon to contaminated sediment is an established means of remediation but its applicability to sediments high in organic carbon is presently unknown. We evaluated the effects of adding either granular activated carbon (GAC) or pelletized fine-grained activated carbon (PfAC, containing ∼ 50% AC) to contaminated sediments from Lake Apopka featuring a very high total organic carbon content (∼39% w/w dry). Sediments showing background levels of legacy pesticides were spiked with a mixture of 5 chemicals (p,p'-DDE, dieldrin, triclosan, triclocarban, and fipronil) to a nominal concentration of 2 μg/g sediment for each chemical...
January 16, 2018: Chemosphere
https://www.readbyqxmd.com/read/29373146/alterations-in-male-reproductive-hormones-in-relation-to-environmental-ddt-exposure
#9
Maria Bornman, Rhena Delport, Paulina Farías, Natalie Aneck-Hahn, Sean Patrick, Robert P Millar, Christiaan de Jager
DDT [1, 1, 1-trichloro-2,2-bis (p-chlorophenyl)-ethane] compounds are used for indoor residual spraying (IRS) to control malaria mosquitoes. DDT is an endocrine disruptor chemical in experimental conditions, but little is known of adverse effects related to living conditions with continual uptake across a time span by all possible means of exposure. Based on estrogenic and/or anti-androgenic effects found in animal studies, we hypothesized that chronic DDT/DDE exposures in men may be associated with changes in male reproductive hormones...
January 17, 2018: Environment International
https://www.readbyqxmd.com/read/29354855/combined-treatment-of-contaminated-soil-with-a-bacterial-stenotrophomonas-strain-dxz9-and-ryegrass-lolium-perenne-enhances-ddt-and-dde-remediation
#10
Hui Xie, Lusheng Zhu, Jun Wang
Bioremediation of contaminated soils by a combinational approach using specific bacterial species together with ryegrass is a promising strategy, resulting in potentially highly efficient degradation of organic contaminants. The present study tested the combination of strain DXZ9 of Stenotrophomonas sp. with ryegrass to remove DDT and DDE contaminants from soil under natural conditions in a pot experiment. The strain DXZ9 was successfully colonized in the natural soil, resulting in removal rates of approximately 77% for DDT, 52% for DDE, and 65% for the two pollutants combined after 210 days...
January 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29352755/a-mos1-transposase-in-vivo-assay-to-screen-new-hiv-1-integrase-inhibitors
#11
Mariana Cancian, Elgion L S Loreto
The integrase and transposase enzymes of retrovirus and transposons, respectively, share the catalytic DDE domain. In vitro assays showed that inhibitors of HIV-1 integrase generally inhibit the mariner Mos1 transposase. Using a Drosophila strain in which the mobilisation of the mariner element can be quantified by mosaic eyes, we showed that flies maintained in medium containing 210 µM to 4 mM of raltegravir, or 1 or 2 mM of dolutegravir, which are HIV-1 integrase inhibitor used in AIDS treatment, have 23-33% less somatic mobilisation in mosaic eyes when treated with raltegravir and 28-32% when treated with dolutegravir...
January 19, 2018: Genetica
https://www.readbyqxmd.com/read/29345919/using-isomeric-and-metabolic-ratios-of-ddt-to-identify-the-sources-and-fate-of-ddt-in-chinese-agricultural-topsoil
#12
Chong Zhang, Li Liu, Yan Ma, Fasheng Li
The metabolic ratio of (p,p'-DDE + p,p'-DDD)/p,p'-DDT or p,p'-DDE/p,p'-DDT has been used previously to estimate the approximate half-life of p,p'-DDT, with a relatively unclear concept of "old" and "new" sources of p,p'-DDT and without paying attention to the influence by dicofol-type DDT contributed from the more recent usage of dicofol. Based on the isomeric ratio of o,p'-DDT/p,p'-DDT to distinguish the sources of DDT, this study used the corrected metabolic ratio of (p,p'-DDE + p,p'-DDD)/p,p'-DDT to estimate a more accurate half-life of p,p'-DDT using a model-based approach...
January 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29341602/polybrominated-diphenyl-ethers-polychlorinated-biphenyls-and-2-2-bis-4-chlorophenyl-1-1-dichloroethene-p-p-dde-in-7-and-9-year-old-children-and-their-mothers-in-the-chamacos-cohort
#13
Andreas Sjodin, Richard S Jones, Robert Gunier, Lee-Yang Wong, Nina T Holland, Brenda Eskenazi, Asa Bradman
We report longitudinal serum concentrations of select persistent organic pollutants in children at age seven and nine years and in their mothers prenatally and again when the children were nine years old. The participating families were enrolled in the Center for the Health Assessment of Mothers and Children of Salinas (CHAMACOS), a longitudinal birth cohort study of low income Hispanic families residing in the Salinas Valley, California. We observed decreasing concentrations in the mothers with year of serum collection (2009 vs...
January 17, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29336512/using-field-data-to-quantify-chemical-impacts-on-wildlife-population-viability
#14
Jelle P Hilbers, Renske P J Hoondert, Aafke M Schipper, Mark A J Huijbregts
Environmental pollution is an important driver of biodiversity loss. Yet, to date, the effects of chemical exposure on wildlife populations have been quantified for only a few species, mainly due to a lack of appropriate laboratory data to quantify chemical impacts on vital rates. In this study we developed a method to quantify the effects of toxicant exposure on wildlife population persistence based on field monitoring data. We established field-based vital rate-response functions for toxicants, using quantile regression to correct for the influences of confounding factors on the vital rates observed, and combined the response curves with population viability modelling...
January 16, 2018: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29329097/sources-and-transformation-pathways-for-dichlorodiphenyltrichloroethane-ddt-and-metabolites-in-soils-from-northwest-fujian-china
#15
Huanfang Huang, Yuan Zhang, Wei Chen, Wenwen Chen, Dave A Yuen, Yang Ding, Yingjie Chen, Yao Mao, Shihua Qi
Dicofol (2,2,2-trichloro-1,1-bis-(p-chlorophenyl)ethanol) found in the environment is not only a miticide originated from commercial use, but also a metabolite of dichlorodiphenyltrichloroethane (DDT), which is often overlooked. To verify the sources and transformation pathways of DDT and related metabolites in soils, we measured p,p'-(dicofol + DBP) (sum of p,p'-dicofol and 4,4'-dichlorobenzophenone), DDT and six metabolites in soils from Northwest Fujian, China. The ratios of 1,1,1-trichloro-2-(o-chlorophenyl)-2-(p-chlorophenyl)ethane (o,p'-DDT)/1,1,1-trichloro-2,2-bis-(p-chlorophenyl)ethane (p,p'-DDT) and the mass balance demonstrated that p,p'-(dicofol + DBP) predominantly originated from p,p'-DDT transformation rather than from actual dicofol application...
January 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29318322/persistent-organochlorine-pollutants-in-placentas-sampled-from-women-in-croatia-and-an-evaluation-of-their-dna-damaging-potential-in-vitro
#16
Davor Želježić, Snježana Herceg Romanić, Darija Klinčić, Marijana Matek Sarić, Judita Grzunov Letinić
This study investigated the levels and distribution of 17 polychlorinated biphenyls (PCBs) and organochlorine pesticides (HCB, α-HCH, β-HCH, γ-HCH, p,p'-DDE, p,p'-DDD, and p,p'-DDT) in placenta samples from women living in the coastal area of Croatia. During November 2012 to February 2013, 51 placenta samples were collected from healthy mothers. This study presents the first report about Croatian placenta samples. Each of the analysed compounds were found in all of the samples; all of the maximum values were < 1 ng g-1 w...
January 9, 2018: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29307071/dietary-exposure-to-hch-and-ddt-congeners-and-their-associated-cancer-risk-based-on-pakistani-food-consumption
#17
Muhammad Aamir, Sardar Khan, Gang Li
Dietary exposure to organochlorine pesticides such as hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethane (DDT) congeners was assessed using diet study approach, and for this purpose, different food items were collected in August 2014. The levels of ∑(HCHs + DDTs) in different food groups were ranged from 2.57 to 206 ng g-1, ww, with contamination order of fish > poultry > milk > vegetables > cereals > flour > fruits. In the present study, the ratios of β-HCH/∑HCH (0.19-0...
January 6, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29306412/automated-and-simultaneous-determination-of-priority-substances-and-polychlorinated-biphenyls-in-wastewater-using-headspace-solid-phase-microextraction-and-high-resolution-mass-spectrometry
#18
Irene Domínguez, Francisco Javier Arrebola, Rafael Gavara, José Luis Martínez Vidal, Antonia Garrido Frenich
The re-use of wastewater has been in growing demand but a possible negative feature is the possibility of organic pollutants being present after its treatment. In order to control the presence of contaminants in wastewater, a completely automated methodology capable of determining a total of 55 organic pollutants including pesticides, polycyclic aromatic hydrocarbons (PAHs), brominated diphenyl ethers (BDEs) and polychlorinated biphenyls (PCBs) at ultra-trace levels has been developed. The proposed method is based on an on-line combination of headspace solid phase microextraction (HS-SPME) and gas chromatography coupled to double-focusing magnetic sector high resolution mass spectrometry (GC-HRMS)...
March 9, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29306074/association-between-developmental-defects-of-enamel-and-celiac-disease-a-meta-analysis
#19
REVIEW
Débora Souto-Souza, Maria Eliza da Consolação Soares, Vanessa Silva Rezende, Paulo César de Lacerda Dantas, Endi Lanza Galvão, Saulo Gabriel Moreira Falci
OBJECTIVES: Studies have observed the presence of extra-intestinal manifestations of celiac disease (CD), including involvement of the oral cavity, such that developmental defects of enamel (DDE) occur. Thus, the aim of this review was to access the polled prevalence of DDE in individuals with CD, and to establish the strength of the association between these two variables. METHODS: To carry out the systematic review, four electronic databases and the Grey Literature were searched, complemented by a manual search of reference lists within the selected articles...
December 28, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29303683/assessment-of-polychlorinated-biphenyls-organochlorine-pesticides-and-polybrominated-diphenyl-ethers-in-the-blood-of-humboldt-penguins-spheniscus-humboldti-from-the-punta-san-juan-marine-protected-area-peru
#20
Michael J Adkesson, Jeffrey M Levengood, John W Scott, David J Schaeffer, Jennifer N Langan, Susana Cárdenas-Alayza, Santiago de la Puente, Patricia Majluf, Sandra Yi
Persistent organic pollutants were assessed in Humboldt Penguins ( Spheniscus humboldti) from the Punta San Juan Marine Protected Area, Peru, in the austral winter of 2009. Plasma samples from 29 penguins were evaluated for 31 polychlorinated biphenyl (PCB) congeners and 11 organochlorine pesticides (OCPs) by using gas chromatography coupled to an ion trap mass spectrometer and for 15 polybrominated diphenyl ether (PBDE) congeners by using gas chromatography coupled with high-resolution mass spectrometry. The detection rate for PCBs in the samples was 69%, with congeners 105, 118, 180, and 153 most commonly detected...
January 5, 2018: Journal of Wildlife Diseases
keyword
keyword
37539
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"