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https://www.readbyqxmd.com/read/28336095/chlorinated-pesticides-and-natural-brominated-anisoles-in-air-at-three-northern-baltic-stations
#1
Terry F Bidleman, Hjalmar Laudon, Olle Nygren, Staffan Svanberg, Mats Tysklind
Polyurethane foam (PUF) disk passive samplers were deployed at one inland and two island locations in the Bothnian Bay region of the northern Baltic Sea. Uptake was linear over 81-147 d and a temperature range of -2.6 to 14.2 °C for organochlorine pesticides (OCPs) and current-use pesticides (CUPs) having log KOA ≥9 at ambient temperatures. Partial saturation of the PUF disks occurred for the more volatile OCPs hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), and for bromoanisoles (BAs), which are products of bromophenols released by natural and anthropogenic sources...
March 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28335995/assessment-of-dietary-exposure-to-organohalogen-contaminants-legacy-and-emerging-flame-retardants-in-a-norwegian-cohort
#2
Fuchao Xu, Joo-Hui Tay, Adrian Covaci, Juan Antonio Padilla-Sánchez, Eleni Papadopoulou, Line Småstuen Haug, Hugo Neels, Ulla Sellström, Cynthia A de Wit
Polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), emerging halogenated flame retardants (EHFRs) and organophosphate flame retardants (PFRs) were detected in 24h duplicate diet samples from a Norwegian cohort (n=61), with concentrations ranging from <method limit of quantification (MLQ)-0.64ng/g ww, <MLQ-0.70ng/g ww, <MLQ-0.93ng/g ww, <MLQ-0.14ng/g ww, and <MLQ-150ng/g ww, respectively. All studied contaminants were detected in the duplicate diet samples with detection frequencies (DF) ranging from 1...
March 20, 2017: Environment International
https://www.readbyqxmd.com/read/28334674/organochlorine-pesticides-in-soil-air-and-vegetation-at-and-around-a-contaminated-site-in-southwestern-china-concentration-transmission-and-risk-evaluation
#3
Yanyan Fang, Zhiqiang Nie, Qingqi Die, Yajun Tian, Feng Liu, Jie He, Qifei Huang
Remediation and management of contaminated sites have become a prevalent problem under the current situation in China. The present study was conducted to investigate the concentration, transmission, and health risk of organochlorine pesticides (OCPs) in soil, air, and vegetation at and around a typical pesticide-contaminated site located in southwestern China. Exchange flux between soil and air was calculated to investigate the transmission of OCPs. Hexachlorocyclohexane (ΣHCHs, top soil: 19.1 mg/kg d.w., air: 52...
March 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28332723/evidence-for-persistent-organochlorine-pollutants-in-the-human-adrenal-cortex
#4
Enza Fommei, Roberta Turci, Andrea Ripoli, Silvana Balzan, Fabrizio Bianchi, Luca Morelli, Alessio Coi
Environmental pollutants may act as endocrine disruptors in animals. Organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) enter the food chain and may accumulate in the fatty animal tissues, including adrenals. To our knowledge, no previous study has investigated their presence in the human normal adrenal (NA) cortex and aldosterone-producing adenomas (APA). Surgical fragments of APA from 11 patients and NA from 8 kidney donors were analyzed for 16 PCBs congeners and 10 OCPs. A Matrix Solid-Phase Dispersion (MSPD) method for simultaneous determination of the target compounds in cortex homogenates was developed...
March 23, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28329745/interleukin-6-and-hepcidin-levels-during-hormone-deplete-and-hormone-replete-phases-of-an-oral-contraceptive-cycle-a-pilot-study
#5
Marc Sim, Brian Dawson, Grant Landers, Dorine W Swinkels, Erwin Wiegerinck, Bu B Yeap, Debbie Trinder, Peter Peeling
BACKGROUND: In the past, elevated estradiol levels were reported to downregulate the iron regulatory hormone hepcidin, thereby potentially improving iron metabolism. As estrogen plays a role in regulating the menstrual cycle and can influence the cytokine interleukin-6 (IL-6; a hepcidin up-regulator), this investigation examined the effects of estradiol supplementation achieved by the use of a monophasic oral contraceptive pill (OCP) on IL-6, hepcidin levels and iron status during the hormone-deplete versus hormone-replete phases within an oral contraceptive cycle (OCC)...
March 23, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28329713/pcbs-and-ocps-in-human-milk-in-eastern-siberia-russia-levels-temporal-trends-and-infant-exposure-assessment
#6
Elena A Mamontova, Eugenia N Tarasova, Alexander A Mamontov
The aim of our study is to investigate the spatial distribution of polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), dichlorodiphenyltrichloroethane (p,p'-DDT) and its metabolites, α- and γ-isomers of hexachlorocyclohexane (HCH) in 155 samples of human milk (HM) from Eastern Siberia (six towns and seven villages in Irkutsk Region, one village of the Republic of Buryatia and one town in Zabaikal'sk Region, Russia), and to examine the dietary and social factors influencing the human exposure to the organochlorines...
March 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28324837/status-of-pesticides-pollution-in-tanzania-a-review
#7
REVIEW
Raheli Elibariki, Mihayo Musabila Maguta
Various studies have been conducted in Tanzania to assess the magnitude of pesticides pollution associated with pesticides application, storage, disposal as well as knowledge of farmers on pesticides handling. The studies analysed samples from different matrices covering vegetation, biota, water, sediments and soil. The objective of this review was to summarise the results of pesticides residues reported in different components of the environment to give a clear picture of pesticides pollution status in the country for law enforcement as well as for taking precaution measures...
March 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28322546/diverse-bonding-activations-in-the-reactivity-of-a-pentaphenylborole-toward-sodium-phosphaethynolate-heterocycle-synthesis-and-mechanistic-studies
#8
Yan Li, Rahul Kumar Siwatch, Totan Mondal, Yongxin Li, Rakesh Ganguly, Debasis Koley, Cheuk-Wai So
The reaction of the pentaphenylborole [(PhC)4BPh] (1) with sodium phosphaethynolate·1,4-dioxane (NaOCP(1,4-dioxane)1.7) afforded the novel sodium salt of phosphaboraheterocycle 2. It comprises anionic fused tetracyclic P/B-heterocycles that arise from multiple bond activation between the borole backbone and [OCP](-)anion. Density functional theory calculations indicate that the [OCP](-) anion prefers the form of phosphaethynolate (-)O-C≡P over phosphaketenide O═C═P(-) to interact with two molecules of 1, along with various B-C, C-P, and C-C bond activations to form 2...
March 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28320535/optimization-of-selective-pressurized-liquid-extraction-of-organic-pollutants-in-placenta-to-evaluate-prenatal-exposure
#9
REVIEW
Tania Fernández-Cruz, Elena Martínez-Carballo, Jesús Simal-Gándara
The early exposure to organic pollutants (OPs) related to dietary habit or environmental exposure is a concern of growing interest in environmental health. When OPs enter the body, they can accumulate in fatty tissue and even travel through the bloodstream being able to cross the placenta and reach the fetus through the substance exchange between the mother and the child. Epidemiologic and clinical data affirm that these chemicals increase the risk of adverse effects during childhood. This article reviews and addresses one of the most relevant analytical methods for determining OPs in placenta...
March 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28315117/the-evolution-of-pollution-profile-and-health-risk-assessment-for-three-groups-svocs-pollutants-along-with-beijiang-river-china
#10
Jiao Tang, Taicheng An, Jukun Xiong, Guiying Li
Three important groups of semi-volatile organic compounds (SVOCs), polycyclic aromatic hydrocarbons (PAHs), organic chlorinated pesticides (OCPs) and phthalate esters (PAEs), were produced by various human activities and entered the water body. In this study, the pollution profiles of three species including 16 PAHs, 20 OCPs and 15 PAEs in water along the Beijiang River, China were investigated. The concentrations of Σ16PAHs in the dissolved and particulate phases were obtained as 69-1.5 × 10(2) ng L(-1) and 2...
March 17, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28302941/organochlorine-pesticide-contamination-of-foods-in-africa-incidence-and-public-health-significance
#11
Lesa A Thompson, Wageh Sobhy Darwish, Yoshinori Ikenaka, Shouta M M Nakayama, Hazuki Mizukawa, Mayumi Ishizuka
Organochlorine pesticides (OCPs) have been used worldwide, particularly in Africa for several decades. Although many are banned, several African countries still use OCPs especially for the prevention and control of malaria. OCPs are characterized by their bio-accumulation in the environment, especially in the food chain, where they find their way into the human body. Despite no clear epidemiological studies confirming hazardous effects of these chemicals on human health, many studies have reported positive associations between the use of OCPs and neurological and reproductive disorders, and cancer risk...
March 16, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28297126/a-planar-ti2p2-core-assembled-by-reductive-decarbonylation-of-o-c%C3%A2-p-and-p-p-radical-coupling
#12
Lauren N Grant, Balazs Pinter, Brian C Manor, Riccardo Suter, Hansjõrg Grützmacher, Daniel J Mindiola
The first structural elucidation of the first group 4 transition metal P2 complex, namely [(nacnac)Ti(OAr)]2(μ2:η2,η2-P2) (1), is reported. Complex 1 is formed via reductive decarbonylation of the phosphaethynolate ion -[OCP], which serves as a P atom source. The rhombic Ti2P2 core is essentially planar with short bond lengths suggesting some degree of multiple bonding character between the Ti-P and P-P sites. Also observed in 1 was the rather downfield shifted 31P NMR spectroscopic signal, appearing as a broadened resonance (Δν1/2 ~ 4034 Hz) at 907 ppm...
March 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28292450/choosing-the-right-oral-contraceptive-pill-for-teens
#13
REVIEW
Anne Powell
Oral contraceptive pills (OCPs) continue to be the most commonly used form of prescription contraceptives used by adolescents in the United States. With proper use, oral contraceptives provide safe and effective birth control. Broad categories of OCPs include progestin-only pills (POPs) and combined oral contraceptive pills (COCs). Certain types of progestins have more potent antiandrogenic properties and are more effective in treating acne, hirsutism, and polycystic ovary syndrome. This article reviews types of OCPs, discusses risks and benefits of OCPs, and provides guidance for how to choose the most beneficial and appropriate OCP for individual adolescent patients...
April 2017: Pediatric Clinics of North America
https://www.readbyqxmd.com/read/28287900/increased-coagulation-and-decreased-fibrinolysis-as-measured-with-overall-hemostatic-potential-are-dependent-on-bmi-and-not-associated-with-pcos
#14
Matej Rakusa, Mojca Jensterle, Mojca Božič-Mijovski, Andrej Janez
BACKGROUND: Overall hemostatic potential (OHP) captures all factors that affect coagulation and fibrinolysis cascade. It has not yet been assessed in polycystic ovary syndrome (PCOS). The aim of the study was to identify the relationship of OHP with a syndrome per se and body mass index (BMI). METHODS: In 90 women with PCOS aged 30.9 ± 8.1 years (50 obese, 13 overweight, and 27 lean) and 21 healthy age-matched controls (11 obese and 10 lean), OHP with overall coagulation potential (OCP) and overall fibrinolytic potential (OFP) was determined spectrophotometrically...
March 13, 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28284117/remediation-of-organochlorine-pesticides-contaminated-lake-sediment-using-activated-carbon-and-carbon-nanotubes
#15
Shan Hua, Ji-Lai Gong, Guang-Ming Zeng, Fu-Bing Yao, Min Guo, Xiao-Ming Ou
Organochlorine pesticides (OCPs) in sediment were a potential damage for humans and ecosystems. The aim of this work was to determine the effectiveness of carbon materials remedy hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethanes (DDTs) in sediment. Two different carbon materials including activated carbon (AC) and multi-walled carbon nanotubes (MWCNTs) were used in the present research. Sediment treated with 2 wt% AC and MWCNTs after 150 d contact showed 97%, and 75% reduction for HCH, and 93% and 59% decrease for DDTs in aqueous equilibrium concentration, respectively...
March 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28281139/spatial-distributions-source-apportionment-and-ecological-risk-of-svocs-in-water-and-sediment-from-xijiang-river-pearl-river-delta
#16
Jiao Tang, Taicheng An, Guiying Li, Chaohai Wei
Xijiang River is an important drinking water source in Guangxi Province, China. Along the Xijiang River and surrounding tributary, the pollution profile of three important groups of semi-volatile organic compounds, including polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and phthalate esters (PAEs), was analyzed. Relatively low levels of PAHs (64-3.7 × 10(2) ng L(-1)) and OCPs (16-70 ng L(-1)), but high levels of PAEs (7.9 × 10(2)-6.8 × 10(3) ng L(-1)) occurred in the water...
March 9, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28281068/indicator-polychlorinated-biphenyls-pcbs-and-organochlorine-pesticides-ocps-in-seafood-from-xiamen-china-levels-distributions-and-risk-assessment
#17
Zhuozhen Qian, Fangfang Luo, Chengye Wu, Ran Zhao, Xuan Cheng, Wenfeng Qin
Indicator polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were determined in 289 seafood samples including fishes, crustaceans, and shellfish collected from six administrative regions in Xiamen of China. The residual levels of PCBs, dichlorodiphenyltrichloroethane and its metabolites (DDTs), and hexachlorocyclohexanes (HCHs) ranged <LOD-64 (median 1.8) ng g(-1) wet weight (ww), 0.03-88 (median 1.4) ng g(-1) ww, and <LOD-5.5 (median <LOD) ng g(-1) ww, respectively. The most abundant compounds were PCB101, p,p'-DDT, and β-HCH...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28277312/organochlorinated-pesticides-levels-in-a-representative-sample-of-the-spanish-adult-population-the-bioambient-es-project
#18
Juan José Ramos, Olga Huetos, Sara González, Marta Esteban, Eva Calvo, Beatriz Pérez-Gómez, Argelia Castaño
Organochlorinated pesticides (OCPs) were measured in a representative sample of Spanish adults within the Bioambient.es project, a nationwide human biomonitoring program promoted by Spanish Ministry of Agriculture, Food and Environment. The objective of Bioambient.es is to establish reference levels of environmental pollutants in the general population. Participants were recruited in 2009-2010 during their annual medical examination at work. Serum levels of thirteen OCPs were investigated: Aldrin, endrin, dieldrin, heptachlor, heptachlor-epoxide, dichlorodiphenyldichloroethylenes (DDEs), hexachlorobenzene (HCB), dichlorodiphenyltrichloroethanes (DDTs) and hexachlorocyclohexanes (HCHs) The highest concentrations were observed for DDE, HCB and β-HCH...
October 17, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28277179/gas-chromatography-tandem-mass-spectrometry-multi-residual-analysis-of-contaminants-in-italian-honey-samples
#19
Marcello Saitta, Giuseppa Di Bella, Maria Rita Fede, Vincenzo Lo Turco, Angela Giorgia Potortì, Rossana Rando, Maria Teresa Russo, Giacomo Dugo
Contaminants belonging to various classes, including polychlorobiphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), organophosphorus pesticides (OPPs), pyrethroid insecticides (PYRs), fungicides (Fs), herbicides (Hs), synergists (SYNs) and insect growth regulators (IGRs) were analysed simultaneously in honey samples using a new simultaneous, easy and rapid method based on a liquid-liquid extraction with a mixture of n-hexane and ethyl acetate. It allowed recoveries in the range 80-137%, with limits of detection (LODs) between 0...
February 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28273962/organochlorine-pesticide-mediated-induction-of-nadph-oxidase-and-nitric-oxide-synthase-in-endothelial-cell
#20
Rishila Ghosh, Manushi Siddharth, Neeru Singh, Pawan Kumar Kare, Basu Dev Banerjee, Neelam Wadhwa, Ashok Kumar Tripathi
INTRODUCTION: Organochlorine Pesticides (OCPs) are detected ubiquitously in human and have been shown to be associated with Cardiovascular Disease (CVD) and atherosclerosis. AIM: To find out the effect of organochlorine pesticides in endothelial cell with regard to oxidative stress and associated expression of enzymes producing superoxide and Nitric Oxide (NO). MATERIALS AND METHODS: Human Umbilical Vein Endothelial Cells (HUVEC) were cultured and treated with four OCPs which were found in human blood at a concentration of 0...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
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