keyword
MENU ▼
Read by QxMD icon Read
search

DDT

keyword
https://www.readbyqxmd.com/read/28728131/the-distribution-of-organochlorine-pesticides-in-sediments-from-isimangaliso-wetland-park-ecological-risks-and-implications-for-conservation-in-a-biodiversity-hotspot
#1
Archibold Buah-Kwofie, Marc S Humphries
The iSimangaliso Wetland Park World Heritage site, located on the east coast of South Africa, spans ∼3300 km(2) and constitutes the largest protected estuarine environment for hippopotami, crocodiles and aquatic birds in Africa. Given the ecological importance of this site and continued use of organochlorine pesticides (OCPs) in the region, this study focused on the nature, distribution and potential sources of organochlorine contamination within iSimangaliso Wetland Park. OCPs were widely distributed in surface sediment samples obtained from the four main Ramsar wetland systems within the park (Lake St Lucia, Mkhuze, Lake Sibaya and Kosi Bay)...
July 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28719327/extensive-resistance-of-anopheles-sinensis-to-insecticides-in-malaria-endemic-areas-of-hainan-province-china
#2
Ding-Wei Sun, Guang-Ze Wang, Lin-Hai Zeng, Shan-Gan Li, Chang-Hua He, Xi-Min Hu, Shan-Qing Wang
Anopheles sinensis is one of the major malaria vectors and among the dominant species in Hainan Province, China. The resistance of An. sinensis to insecticides is an important threat to malaria control. However, few reports on insecticide resistance of An. sinensis were reported in this area. Eight districts in Hainan Province were selected as the study areas. Insecticide susceptibility bioassays were tested on wild-caught female mosquitoes of An. sinensis to 4% dichlorodiphenyltrichloroethane (DDT), 0.05% deltamethrin, and 5% malathion by using the World Health Organization standard resistance tube assay procedure...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28716105/characterization-of-four-rice-uev1-genes-required-for-lys63-linked-polyubiquitination-and-distinct-functions
#3
Qian Wang, Yuepeng Zang, Xuan Zhou, Wei Xiao
BACKGROUND: The error-free branch of the DNA-damage tolerance (DDT) pathway is orchestrated by Lys63-linked polyubiquitination of proliferating cell nuclear antigen (PCNA), and this polyubiquitination is mediated by a Ubc13-Uev complex in yeast. We have previously cloned OsUBC13 from rice, whose product functions as an E2 to promote Lys63-linked ubiquitin chain assembly in the presence of yeast or human Uev. RESULTS: Here we identify four highly conserved UEV1 genes in rice whose products are able to form stable heterodimers with OsUbc13 and mediate Lys63-linked ubiquitin chain assembly...
July 17, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28715764/ddt-related-compounds-as-non-extractable-residues-in-submarine-sediments-of-the-palos-verdes-shelf-california-usa
#4
S Kucher, J Schwarzbauer
The Palos Verdes Shelf (PVS) and the continental slope off the Palos Verdes Peninsula are highly contaminated by degradation products of the pesticide DDT (1-chloro-4-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene). Sediment samples from two box cores were analyzed to obtain further information about the fate of DDT and its degradation products within the environment. After solvent extraction, an alkaline hydrolysis procedure was applied. A comprehensive screening for 26 DDT compounds revealed that DDT and its degradates contaminate not only the extractable fraction but also the fraction released by alkaline hydrolysis...
July 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28715401/extraction-of-organochlorine-pesticides-from-plastic-pellets-and-plastic-type-analysis
#5
Marilyne Pflieger, Petra Makorič, Manca Kovač Viršek, Špela Koren
Plastic resin pellets, categorized as microplastics (≤5 mm in diameter), are small granules that can be unintentionally released to the environment during manufacturing and transport. Because of their environmental persistence, they are widely distributed in the oceans and on beaches all over the world. They can act as a vector of potentially toxic organic compounds (e.g., polychlorinated biphenyls) and might consequently negatively affect marine organisms. Their possible impacts along the food chain are not yet well understood...
July 1, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28708418/vaccines-pesticides-and-narratives-of-exposure-and-evidence
#6
Elena Conis
This essay considers the cultural work performed by two public health narratives - the DDT narrative and the vaccine narrative - as they appeared in popular and professional discourse concerning two recent media events: controversy over an antivaccination film, and the emergence of a Zika global public health emergency. Like all narratives in the history of medicine, the stories historians and others tell about DDT and about vaccines organize a shared past to explain the present. They also point to a hoped-for future...
July 14, 2017: Canadian Bulletin of Medical History, Bulletin Canadien D'histoire de la Médecine
https://www.readbyqxmd.com/read/28700639/the-effects-of-ingestion-of-hormonal-host-factors-on-the-longevity-and-insecticide-resistance-phenotype-of-the-major-malaria-vector-anopheles-arabiensis-diptera-culicidae
#7
Shüné V Oliver, Basil D Brooke
Exogenous vertebrate-derived factors circulating in the blood have the capacity to modulate the biology of haematophagous insects. These include insulin, insulin growth factor 1 (IGF) and transforming growth factor β1 (TGFβ). The effects of the consumption of these three proteins were examined on laboratory strains of Anopheles arabiensis. SENN, an insecticide susceptible strain and SENN DDT, a resistant strain selected from SENN, were fed with host factor-supplemented sucrose. Adult longevity was measured and insecticide resistance phenotype over time was assessed by WHO bioassay...
2017: PloS One
https://www.readbyqxmd.com/read/28696207/levels-and-determinants-of-ddt-and-dde-exposure-in-the-vhembe-cohort
#8
Fraser W Gaspar, Jonathan Chevrier, Lesliam Quirós-Alcalá, Jonah M Lipsitt, Dana Boyd Barr, Nina Holland, Riana Bornman, Brenda Eskenazi
BACKGROUND: Although indoor residual spraying (IRS) is an effective tool for malaria control, its use contributes to high insecticide exposure in sprayed communities and raises concerns about possible unintended health effects. OBJECTIVE: The Venda Health Examination of Mothers, Babies and their Environment (VHEMBE) is a birth cohort study initiated in 2012 to characterize prenatal exposure to IRS insecticides and exposures' impacts on child health and development in rural South Africa...
July 7, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28693362/veterinary-utility-of-dried-blood-spots-for-analysis-of-toxic-chlorinated-hydrocarbons
#9
Andreas F Lehner, Margaret Johnson, John Buchweitz
Dried blood spots (DBS) on filter paper provide a simple and convenient means of collecting, storing and shipping samples for veterinary diagnostics related to toxin exposures. This paper presents validation data on analysis of DBS for chlorinated persistent organic pollutants, specifically 4,4'-DDT and its breakdown product 4,4'-DDE, lindane and a representative polychlorinated biphenyl (PCB) congener PCB-153. Analysis was by gas chromatography with electron capture detection (GC-ECD). The method required one 12...
July 11, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28691715/dichlorodiphenyltrichloroethane-ddt-induced-extracellular-vesicle-formation-a-potential-role-in-organochlorine-increased-risk-of-parkinson-s-disease
#10
Mario Rossi, Marco Scarselli, Irene Fasciani, Roberto Maggio, Franco Giorgi
A number of studies have demonstrated that rural living and exposure to pesticides such as dichlorodiphenyltrichloroethane (DDT) highly increase the chances of developing Parkinson's disease. In a previous work, we have found that DDT leads to the formation of vesicular buds that are released from the cells upon fusion of an intermediate endocytic compartment with the plasma membrane. Since extracellular vesicles like exosomes have been implicated in the development of neurodegenerative diseases through the propagation of neurotoxic misfolded proteins from neuron to neuron, in this minireview we propose that organochlorine pesticides could enhance the risk of neurodegenerative diseases by increasing the formation of exosomes...
2017: Acta Neurobiologiae Experimentalis
https://www.readbyqxmd.com/read/28670638/a-comparison-of-rapid-diagnostic-testing-by-plasmodium-lactate-dehydrogenase-and-quantitative-buffy-coat-technique-in-malaria-diagnosis-in-children
#11
Ifeanyi Kanayo Ifeorah, Biobele J Brown, Olugbemiro O Sodeinde
BACKGROUND: The World Health Organization (WHO) considers early and rapid diagnosis as one of the strategies to control malaria. This study compared the performance of Quantitative Buffy Coat (QBC) test and the Plasmodium lactate dehydrogenase (pLDH) rapid diagnostic test (RDT) with microscopy as the gold standard. MATERIALS AND METHODS: The study involved children ages 0-5 years who presented with a history of fever at the University College Hospital, Ibadan, Nigeria...
2017: African Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28669095/simultaneous-effect-of-dissolved-organic-carbon-surfactant-and-organic-acid-on-the-desorption-of-pesticides-investigated-by-response-surface-methodology
#12
Ha Thu Trinh, Hanh Thi Duong, Thao Thi Ta, Hoang Van Cao, Bjarne W Strobel, Giang Truong Le
Desorption of pesticides (fenobucarb, endosulfan, and dichlorodiphenyltrichloroethane (DDT)) from soil to aqueous solution with the simultaneous presence of dissolved organic carbon (DOC), sodium dodecyl sulfate (SDS), and sodium oxalate (Oxa) was investigated in batch test by applying a full factorial design and the Box-Behnken response surface methodology (RSM). Five concentration levels of DOC (8 to 92 mg L(-1)), SDS (0 to 6.4 critical micelle concentration (CMC)), and Oxa (0 to 0.15 M) were used for the experiments with a rice field topsoil...
July 2, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28650623/spatial-distributions-of-ddts-in-the-water-masses-of-the-arctic-ocean
#13
Daniel Carrizo, Anna Sobek, Joan A Salvadó, Örjan Gustafsson
There is a scarcity of data on the amount and distribution of the organochlorine pesticide dichlorodiphenyltrichloroethane (DDT) and its metabolites in intermediate and deep ocean water masses. Here, the distribution and inventories of DDTs in water of the Arctic shelf seas and the interior basin are presented. The occurrence of ∑6DDT (0.10-66 pg L(-1)) in the surface water was dominated by 4,4'-DDE. In the Central Arctic Ocean increasing concentrations of DDE with depth were observed in the Makarov and Amundsen basins...
July 10, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28648613/multiple-mechanisms-of-resistance-to-pyrethroids-in-anopheles-gambiae-s-l-populations-in-niger
#14
H Soumaila, M Idrissa, M Akgobeto, G Habi, H Jackou, I Sabiti, A Abdoulaye, A Daouda, I Souleymane, R Osse
INTRODUCTION: We performed a transversal study to map resistance of malaria vectors (Anopheles mosquitoes) to insecticides in Niger within the frame of the National Malaria Control Program funded by the World Health Organization (WHO). METHOD: Larvae of Anopheles gambiae s.l were collected from November to December 2013 in seven locations selected on the basis of different patterns of use of insecticides and environment. WHO susceptibility test tubes were used on females Anopheles to detect resistance to insecticides...
June 22, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28646838/immune-response-cytokines-as-potential-biomarkers-for-ddt-induced-neurodegeneration
#15
Héctor Luis Maldonado-Pérez, Judith Graber, Mark Gregory Robson
Background: The world incidence rate of Alzheimer’s Disease (AD) is 64 cases per 1,000 individuals. Due to the aging population, the prevalence of AD is however increasing and yet, little remains known about the etiology of AD. Objective: Previous studies suggested relationships between AD, neuro-inflammation and organochloride pesticide exposures, therefore, we aimed to study the association between DDT and possible biomarkers of AD. Materials and Methods: We explored literature on inflammation, pesticide exposure and biomarkers associated with AD...
2017: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/28646397/concentrations-of-environmental-chemicals-in-urine-and-blood-samples-of-children-from-san-luis-potos%C3%A3-mexico
#16
Ivan N Perez-Maldonado, Angeles C Ochoa-Martinez, Sandra T Orta-Garcia, Tania Ruiz-Vera, Jose A Varela-Silva
Human biomonitoring (HBM) is an appreciated tool used to evaluate human exposure to environmental, occupational or lifestyle chemicals. Therefore, the aim of this study was to evaluate the exposure levels for environmental chemicals in urine and blood samples of children from San Luis Potosí, Mexico (SLP). This study identifies environmental chemicals of concern such as: arsenic (45.0 ± 15.0 µg/g creatinine), lead (5.40 ± 2.80 µg/dL), t,t-muconic acid (266 ± 220 µg/g creatinine), 1-hydroxypyrene (0...
June 23, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28643154/historical-trends-and-chiral-signatures-of-organochlorine-pesticides-in-sediments-of-qiandao-lake-china
#17
Huayun Yang, Weidong Li, Qi Liu
This study investigated the enantiomeric and depth profiles of organochlorine pesticides (OCPs) accumulated in the sediments of Qiandao Lake, China. OCP concentrations in sediments have increased gradually since the early 1960s, when extensive OCPs application in China began. Concentrations reached maximum levels after 1992, this timing corresponds with the emerging of the "new" usage of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethane (DDTs). In addition, the degradation of chiral OCPs were enantioselective, resulting in enriched (-)-enantiomers for α-HCH and o, p'-DDD...
June 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28642970/abilities-of-co-cultures-of-brown-rot-fungus-fomitopsis-pinicola-and-bacillus-subtilis-on-biodegradation-of-ddt
#18
Atmira Sariwati, Adi Setyo Purnomo, Ichiro Kamei
DDT (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane) is one of the pesticides that are hazardous for the environment and human health. Effective environmental-friendly treatment using co-cultures of fungi and bacteria is needed. In this study, the bacteria Bacillus subtilis at various volumes of 1, 3, 5, 7, and 10 mL (1 mL ≈ 6.7 × 10(8) CFU) were mixed into 10 mL of the brown-rot fungus Fomitopsis pinicola culture for degrading DDT during a 7-days incubation period. DDT was degraded by approximately 42% by F...
June 22, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28639207/the-cell-biology-of-the-thyroid-disrupting-mechanism-of-dichlorodiphenyltrichloroethane-ddt
#19
REVIEW
M Rossi, A R Taddei, I Fasciani, R Maggio, F Giorgi
OBJECTIVE: Dichlorodiphenyltrichloroethane (DDT) is an organochlorine known for its pesticide properties and for its negative effects on human health. It was banned in most countries for its toxicity to the endocrine system, but due to its persistence at clinically relevant concentrations in both soil and animal tissues, DDT is still linked to several health and social problems. METHODS: We have previously shown that DDT exposure is causally related to the extracellular release of vesicular organelles such as microvesicles and/or exosomes by using immunocytochemistry with gold-tagged antibodies and various fluorescent membrane markers...
June 21, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28637430/malaria-control-by-commodities-without-practical-malariology
#20
J Kevin Baird
Malaria remains a serious clinical and public health problem, the object of an ongoing technological and humanitarian struggle to abate the very substantial harm done. The manner by which humanity approached malaria control changed abruptly and profoundly after 1945 with the advent of the insecticide DDT. Malariologists in the first half of the twentieth century conceived precise modifications to natural or man-made environments aimed at making those less hospitable to specific anopheline mosquito vector species...
June 21, 2017: BMC Public Health
keyword
keyword
37540
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"