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https://www.readbyqxmd.com/read/28892854/tissue-distribution-and-maternal-transfer-of-persistent-organic-pollutants-in-kentish-plovers-charadrius-alexandrines-from-cangzhou-wetland-bohai-bay-china
#1
Shucheng Zheng, Pu Wang, Huizhong Sun, Julius Matsiko, Yanfen Hao, Derong Meng, Yingming Li, Guogang Zhang, Qinghua Zhang, Guibin Jiang
Several persistent organic pollutants, including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and organochlorine pesticides (OCPs), were comprehensively investigated in the egg, muscle and liver samples of Kentish Plover (Charadrius alexandrines) collected from Cangzhou Wetland in western Bohai Bay, China. DDTs were the most abundant contaminants (35.4-9853ngg(-1) lipid weight, lw), followed by HCHs, PCBs, PBDEs and HCB...
September 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28869886/persistent-organic-pollutants-in-red-crowned-cranes-grus-japonensis-from-hokkaido-japan
#2
Kensaku Kakimoto, Kazuhiko Akutsu, Haruna Nagayoshi, Yoshimasa Konishi, Keiji Kajimura, Naomi Tsukue, Tomoo Yoshino, Fumio Matsumoto, Takeshi Nakano, Ning Tang, Kazuichi Hayakawa, Akira Toriba
The red-crowned crane (Grus japonensis) from eastern Hokkaido is classified as a Special Natural Monument in Japan. In this study, we determined the concentrations of persistent organic pollutants (POPs) in red-crowned crane muscle tissues (n = 47). Polychlorinated biphenyls (PCBs) had the highest median concentration (240ng/g lipid weight), followed by dichlorodiphenyltrichloroethane and its metabolites (DDTs) (150ng/g lipid weight), chlordane-related compounds (CHLs) (36ng/g lipid weight), hexachlorobenzene (HCB) (16ng/g lipid weight), hexachlorocyclohexanes (HCHs) (4...
September 1, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28838040/partition-kinetics-of-chlorobenzenes-in-a-sediment-water-system
#3
Djohan Djohan, Jimmy Yu, Des Connell
The partition kinetics of chlorobenzenes (CBs) in a sediment-water system were studied to provide a basis for understanding the compounds' behaviour in the natural aquatic environment. A series of chlorobenzenes (CBs) 1,4-dichlorobenzene (DCB), 1,3,5-trichlorobenzene (TCB), 1,2,4,5-tetrachlorobenzene (TeCB), pentachlorobenzene (QCB), and hexachlorobenzene (HCB) were spiked to the sediment, and the concentrations of CBs both in sediment and water were measured at six different mixing time periods (0.17, 1, 4, 12, 24 and 48 h)...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28835693/microrna-profile-for-health-risk-assessment-environmental-exposure-to-persistent-organic-pollutants-strongly-affects-the-human-blood-microrna-machinery
#4
Julian Krauskopf, Theo M de Kok, Dennie G Hebels, Ingvar A Bergdahl, Anders Johansson, Florentin Spaeth, Hannu Kiviranta, Panu Rantakokko, Soterios A Kyrtopoulos, Jos C Kleinjans
Persistent organic pollutants (POPs) are synthetic chemical substances that accumulate in our environment. POPs such as polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB) and dichlorodiphenyltrichloroethane (DDT) have been classified as carcinogenic to humans and animals. Due to their resistance to biodegradation humans are still exposed to these compounds worldwide. We aim to evaluate the miRNA and transcriptomic response of a human population exposed to POPs. The miRNA and transcriptomic response was measured in blood of healthy subjects by microarray technology and associated with the serum concentrations of six PCB congeners, DDE (a common DDT metabolite), and HCB...
August 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815335/in-focus-in-hcb
#5
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
August 17, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28811655/a-tissue-engineered-blood-vessel-model-of-hutchinson-gilford-progeria-syndrome-using-human-ipsc-derived-smooth-muscle-cells
#6
Leigh Atchison, Haoyue Zhang, Kan Cao, George A Truskey
Hutchison-Gilford Progeria Syndrome (HGPS) is a rare, accelerated aging disorder caused by nuclear accumulation of progerin, an altered form of the Lamin A gene. The primary cause of death is cardiovascular disease at about 14 years. Loss and dysfunction of smooth muscle cells (SMCs) in the vasculature may cause defects associated with HGPS. Due to limitations of 2D cell culture and mouse models, there is a need to develop improved models to discover novel therapeutics. To address this need, we produced a functional three-dimensional model of HGPS that replicates an arteriole-scale tissue engineered blood vessel (TEBV) using induced pluripotent stem cell (iPSC)-derived SMCs from an HGPS patient...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28806676/occurrence-and-air-soil-exchange-of-organochlorine-pesticides-and-polychlorinated-biphenyls-at-a-cawnet-background-site-in-central-china-implications-for-influencing-factors-and-fate
#7
Lingxi Zhan, Tian Lin, Zuwu Wang, Zhineng Cheng, Gan Zhang, Xiaopu Lyu, Hairong Cheng
Ambient air and soil samples were collected between March 2012 and March 2013 at Jinsha, a regional background site in central China, to measure the concentrations of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs). The average concentrations of total OCPs and total PCBs were 191 ± 107 and 39.4 ± 27.1 pg/m(3) in air (gaseous and particulate phase) and 0.585 ± 0.437 and 0.083 ± 0.039 ng/g in soil, respectively. The higher concentrations of p,p'-dichlorodiphenyltrichloroethane (p,p'-DDT) and p,p'-DDT/p,p'-DDE ratios in the soil indicated recent p,p'-DDT input to the soil...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28806565/implications-of-biological-factors-on-accumulation-of-persistent-organic-pollutants-in-antarctic-notothenioid-fish
#8
J M Ríos, N B Lana, N F Ciocco, A Covaci, E Barrera-Oro, E Moreira, J C Altamirano
In the present study, the possible associations between selected persistent organic pollutants (POPs) and biological factors were assessed in different tissues of two Antarctic notothenioid fish: Notothenia rossii (NOR) and Trematomus newnesi (TRN) collected at Potter Cove, King George Island/Isla 25 de Mayo, South Shetland Islands. Specifically, association patterns between biological factors (body size, lipid content, body condition) and POP concentrations (polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT) and metabolites, polybrominated diphenyl ethers (PBDEs), and hexachlorocyclohexane (HCH), hexachlorobenzene (HCB), chlordanes (CHLs) and methoxylated polybrominated diphenyl ethers (MeO-PBDEs)), were explored by using two approaches: multivariate analyses (principal component analysis: PCA) and intraspecific correlations...
August 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28772178/effects-of-biochar-on-dechlorination-of-hexachlorobenzene-and-the-bacterial-community-in-paddy-soil
#9
Yang Song, Yongrong Bian, Fang Wang, Anna Herzberger, Xinglun Yang, Chenggang Gu, Xin Jiang
Anaerobic reductive dechlorination is an important degradation pathway for chlorinated organic contaminants in paddy soil. This study investigated the effects of amending paddy soil with wheat straw biochar on both the dechlorination of hexachlorobenzene (HCB), a typical highly chlorinated contaminant, and on the structure of soil bacteria communities. Soil amendment of 0.1% biochar did not significantly affect the dechlorination of HCB in the soil. However, biochar amendment at higher application levels (5%) stimulated the dechlorination of HCB in the first month of anaerobic incubation and inhibited the dechlorination of HCB after that period...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28766617/hydrothermal-assembly-structures-topologies-luminescence-and-magnetism-of-a-novel-series-of-coordination-polymers-driven-by-a-trifunctional-nicotinic-acid-building-block
#10
Jin-Zhong Gu, Xiao-Xiao Liang, Yan Cai, Jiang Wu, Zi-Fa Shi, Alexander M Kirillov
In this work, a trifunctional N,O-building block, 5-(4-carboxyphenoxy)nicotinic acid (H2cpna), that combines three distinct types of functional groups (COOH, N-pyridyl, and O-ether) was used for the hydrothermal assembly of thirteen new coordination compounds: [Co(μ3-Hcpna)2]n (1), [Mn(μ4-cpna)(H2O)]n (2), [Mn(μ4-cpna)(H2O)2]n (3), [Mn(μ-cpna)(2,2'-bipy)(H2O)2]n (4), {[Ni(μ3-cpna)(2,2'-bipy)(H2O)]2·H2O}n (5), {[Cd(μ3-cpna)(2,2'-bipy)]·2H2O}n (6), [Zn2(μ-cpna)2(2,2'-bipy)2] (7), [Cu(μ-cpna)(2,2'-bipy)(H2O)]n (8), {[Mn(μ-cpna)(phen)2]·6H2O}n (9), {[Ni(μ3-cpna)(phen)(H2O)]·H2O}n (10), [Zn2(μ-cpna)2(phen)2] (11), {[Pb(μ3-cpna)(phen)]·H2O}n (12), and [Ni(μ3-cpna)(4,4'-bipy)0...
August 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28764122/depth-distribution-possible-sources-and-toxic-risk-assessment-of-organochlorine-pesticides-ocps-in-different-river-sediment-cores-affected-by-urbanization-and-reclamation-in-a-chinese-delta
#11
Wei Wang, Junhong Bai, Guangliang Zhang, Xin Wang, Jia Jia, Baoshan Cui, Xinhui Liu
Sediment cores were collected in urban (0-50 cm), rural (0-40 cm) and reclamation-affected river (0-40 cm) environments in the Pearl River Delta. Concentrations of 16 organochlorine pesticides (OCPs) were determined in all collected samples to identify the depth-distribution, possible sources and ecotoxicological risks of OCPs in river sediments affected by urbanization and reclamation in a Chinese delta. The results showed that the top 10 cm of rural river sediments had slightly lower concentrations of the 16 OCPs compared to urban and reclamation-affected rivers, whereas the 30-40 cm sediment layers in the rural river showed higher levels of the 16 OCPs...
November 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28760424/anthocyanins-in-chokeberry-and-purple-maize-attenuate-diet-induced-metabolic-syndrome-in-rats
#12
Maharshi Bhaswant, Siti Raihanah Shafie, Michael L Mathai, Peter Mouatt, Lindsay Brown
OBJECTIVE: Increased consumption of fruits and vegetables as functional foods leads to the reduction of signs of metabolic syndrome. The aim of this study was to measure and compare cardiovascular, liver, and metabolic parameters following chronic administration of the same dose of anthocyanins either from chokeberry (CB) or purple maize (PM) in rats with diet-induced metabolic syndrome. METHODS: Male Wistar rats were fed a maize starch (C) or high-carbohydrate, high-fat diet (H) and divided into six groups for 16 wk...
September 2017: Nutrition
https://www.readbyqxmd.com/read/28753526/influence-of-maternal-and-sociodemographic-characteristics-on-the-accumulation-of-organohalogen-compounds-in-argentinian-women-the-emasar-study
#13
Natalia Bravo, Solrunn Hansen, Inger Økland, Mercè Garí, Marisa V Álvarez, Silvina Matiocevich, Jon-Øyvind Odland, Joan O Grimalt
The occurrence of organohalogen compounds in venous serum from post-partum mothers from two Argentinian cities, Salta and Ushuaia, has been investigated (n = 698). 4,4'-DDE was the most abundant compound in these cities, with geometric means of 33 and 67ng/g lipid weight, respectively. City of residence, age and parity were the main determinants of the accumulation of these compounds. Hexachlorobenzene (HCB) was the second most abundant pollutant in Ushuaia, 8.7ng/g lipid, and β-hexachlorocyclohexane (β-HCH) in Salta, 7...
October 2017: Environmental Research
https://www.readbyqxmd.com/read/28733287/identification-of-the-hcb-gene-operon-involved-in-catalyzing-aerobic-hexachlorobenzene-dechlorination-in-nocardioides-sp-strain-pd653
#14
Koji Ito, Kazuhiro Takagi, Akio Iwasaki, Naoto Tanaka, Yu Kanesaki, Fabrice Martin-Laurent, Shizunobu Igimi
Nocardioides sp. strain PD653 was the first aerobic bacterium capable of mineralizing hexachlorobenzene (HCB) that was identified. In this study, strain PD653-B2, which was unexpectedly isolated from a subculture of strain PD653, was found to lack the ability to transform HCB or pentachloronitrobenzene into pentachlorophenol. Comparative genome analysis of the two strains revealed that genetic rearrangement had occurred in strain PD653-B2, with a genomic region present in strain PD653 being deleted. In silico analysis allowed three open reading frames within this region to be identified as candidate genes involved in HCB dechlorination...
July 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28732330/legacy-persistent-organic-pollutants-including-pbdes-in-the-trophic-web-of-the-ross-sea-antarctica
#15
Simonetta Corsolini, Nicoletta Ademollo, Tania Martellini, Demetrio Randazzo, Marino Vacchi, Alessandra Cincinelli
The ecological features of the Ross Sea trophic web are peculiar and different from other polar food webs, with respect to the use of habitat and species interactions; due to its ecosystem integrity, it is the world's largest Marine Protected Area, established in 2016. Polar organisms are reported to bioaccumulate lipophilic contaminant, viz persistent organic pollutants (POPs). Legacy POPs and flame retardants (polybrominated diphenyl ethers, PBDEs) were studied in key species of the Ross Sea (Euphausia superba, Pleuragramma antarctica) and their predators (Dissostichus mawsoni, Pygoscelis adeliae, Aptenodytes forsteri, Catharacta maccormicki, Leptonychotes weddellii)...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28721451/in-focus-in-hcb
#16
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
September 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28697468/emission-factors-of-unintentional-hcb-and-pecbz-and-their-correlation-with-pcdd-pcdf
#17
Wenwen Gong, Heidelore Fiedler, Xiaotu Liu, Bin Wang, Gang Yu
Hexachlorobenzene (HCB) and pentachlorobenzene (PeCBz) have been listed as unintentional POPs in the annex of the Stockholm Convention and thus, attracted attention by government and researchers. Since the intentional production and use has ceased in most countries, the unintentional releases to the environment have increased. This study gathered 206 and 78 emission factors (EFs) of unintentional HCB and PeCBz from scientific publications and governmental reports, respectively. Most of the EFs referred to the release vector "air" (EFAir) and to a less extent to "product" (EFProduct)...
November 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28689110/persistent-organic-pollutants-in-infants-and-toddlers-relationship-between-concentrations-in-matched-plasma-and-faecal-samples
#18
Yiqin Chen, Andreas Sjodin, Michael S McLachlan, Karin English, Lesa L Aylward, Leisa-Maree L Toms, Julie Varghese, Peter D Sly, Jochen F Mueller
Early-childhood biomonitoring of persistent organic pollutants (POPs) is challenging due to the logistic and ethical limitations associated with blood sampling. We investigated using faeces as a non-invasive matrix to estimate internal exposure to POPs. The concentrations of selected POPs were measured in matched plasma and faecal samples collected from 20 infants/toddlers (aged 13±4.8months), including a repeat sample time point for 13 infants (~5months apart). We observed higher rates of POP quantification in faeces (2g dry weight) than in plasma (0...
July 6, 2017: Environment International
https://www.readbyqxmd.com/read/28682607/mechanism-and-rate-of-thermal-decomposition-of-hexachlorocyclopentadiene-and-its-importance-in-pcdd-f-formation-from-the-combustion-of-cyclodiene-pesticides
#19
Nirmala K Dharmarathne, John C Mackie, Eric M Kennedy, Michael Stockenhuber
Thermal decomposition of hexachlorocyclopentadiene (HCCP) has been studied in inert gas and under oxidative conditions in a silica flow reactor at a residence time of 5.0 s between 690 and 923 K and 1 atm pressure. Pyrolysis was initiated by Cl bond fission to form pentachlorocyclopentadienyl radical; two such radicals then combined to undergo a series of intramolecular rearrangements and Cl fissions, producing principally octachloronaphthalene (8ClNP) and Cl2. This process has been studied by quantum chemical calculation, and a reaction potential energy surface has been developed...
July 26, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28648904/mixture-effects-of-30-environmental-contaminants-on-incident-metabolic-syndrome-a-prospective-study
#20
Lars Lind, Samira Salihovic, Erik Lampa, P Monica Lind
BACKGROUND: Several cross-sectional studies have linked different environmental contaminants to the metabolic syndrome (MetS). However, mixture effects have not been investigated and no prospective studies exist regarding environmental contaminants and the MetS. OBJECTIVES: To study mixture effects of contaminants on the risk of incident MetS in a prospective fashion. METHODS: Our sample consisted of 452 subjects from the Prospective Study of the Vasculature in Uppsala Seniors (PIVUS) study (50% women, all aged 70years) free from the MetS at baseline, being followed for 10years...
June 22, 2017: Environment International
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