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https://www.readbyqxmd.com/read/29333584/in-focus-in-hcb
#1
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
January 15, 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29332276/variability-and-reliability-of-pop-concentrations-in-multiple-breast-milk-samples-collected-from-the-same-mothers
#2
Risa Kakimoto, Masayoshi Ichiba, Akiko Matsumoto, Kunihiko Nakai, Nozomi Tatsuta, Miyuki Iwai-Shimada, Momoko Ishiyama, Noriko Ryuda, Takashi Someya, Ieyasu Tokumoto, Daisuke Ueno
Risk assessment of infant using a realistic persistent organic pollutant (POP) exposure through breast milk is essential to devise future regulation of POPs. However, recent investigations have demonstrated that POP levels in breast milk collected from the same mother showed a wide range of variation daily and monthly. To estimate the appropriate sample size of breast milk from the same mother to obtain reliable POP concentrations, breast milk samples were collected from five mothers living in Japan from 2006 to 2012...
January 13, 2018: Environmental Science and Pollution Research International
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
#3
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/29287340/residue-behavior-of-organochlorine-pesticides-during-the-production-process-of-yogurt-and-cheese
#4
Jing Duan, Zheng Cheng, Jiawei Bi, Yangguang Xu
The presence of organochlorine pesticides (OCPs) in dairy products can lead to human exposure. This study investigated the behavior of OCP residues in milk during yogurt and cheese production. Gas chromatography with electron-capture detection (GC-ECD) was used to detect α-hexachlorocyclohexane (HCH), hexachlorobenzene (HCB), γ-HCH, g-chlordane, and α-chlordane in fresh milk, yogurt, and cheese. The results showed that fermentation reduced the residual concentration of OCPs in yogurt, with processing factors (PFs) ranging from 0...
April 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29287182/persistent-organic-pollutants-skull-size-and-bone-density-of-polar-bears-ursus-maritimus-from-east-greenland-1892-2015-and-svalbard-1964-2004
#5
Tobias Daugaard-Petersen, Rikke Langebæk, Frank F Rigét, Robert J Letcher, Lars Hyldstrup, Jens-Erik Bech Jensen, Thea Bechshoft, Øystein Wiig, Bjørn Munro Jenssen, Cino Pertoldi, Eline D Lorenzen, Rune Dietz, Christian Sonne
We investigated skull size (condylobasal length; CBL) and bone mineral density (BMD) in polar bears (Ursus maritimus) from East Greenland (n = 307) and Svalbard (n = 173) sampled during the period 1892-2015 in East Greenland and 1964-2004 at Svalbard. Adult males from East Greenland showed a continuous decrease in BMD from 1892 to 2015 (linear regression: p < 0.01) indicating that adult male skulls collected in the early pre-pollution period had the highest BMD. A similar decrease in BMD over time was not found for the East Greenland adult females...
December 26, 2017: Environmental Research
https://www.readbyqxmd.com/read/29277037/environmental-pollutant-hexachlorobenzene-induces-hypertension-in-a-rat-model
#6
Rocío Castilla, Agustín Asuaje, Stéphanie Rivière, Caimi Giselle Romero, Pedro Martín, Gabriel Cao, Diana Kleiman de Pisarev, Verónica Milesi, Laura Alvarez
Hexachlorobenzene (HCB) is a dioxin-like environmental pollutant, widely distributed in the environment. New research links exposure to high levels of persistent organic environmental toxicants to cardiovascular disease, however little is known about the effect of HCB on vascular function and on blood pressure. The purpose of the present study was to evaluate biochemical and cardiovascular changes resulting from subchronic HCB exposure. Adult female Sprague-Dawley rats were treated with vehicle or HCB (5 or 500 mg/kg b...
November 22, 2017: Chemosphere
https://www.readbyqxmd.com/read/29276959/biota-monitoring-under-the-water-framework-directive-on-tissue-choice-and-fish-species-selection
#7
Annette Fliedner, Heinz Rüdel, Nina Lohmann, Georgia Buchmeier, Jan Koschorreck
The study addresses the topic of suitable matrices for chemical analysis in fish monitoring and discusses the effects of data normalization in the context of the European Water Framework Directive (WFD). Differences between species are considered by comparing three frequently monitored species of different trophic levels, i.e., chub (Squalius cephalus, n = 28), (bream, Abramis brama, n = 11), and perch (Perca fluviatilis, n = 19) sampled in the German Danube. The WFD priority substances dioxins, furans and dioxin-like polychlorinated biphenyls (PCDD/F + dl-PCB), polybrominated diphenyl ethers (PBDE), α-hexabromocyclododecane (α-HBCDD), hexachlorobenzene (HCB), mercury (Hg), and perfluorooctane sulfonic acid (PFOS) as well as non-dioxin-like (ndl)-PCB were analyzed separately in fillet and carcass and whole body concentrations were calculated...
December 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29247930/variability-of-biological-indices-biomarkers-and-organochlorine-contaminants-in-flounder-platichthys-flesus-in-the-gulf-of-gda%C3%A5-sk-southern-baltic-sea
#8
Orest Kopko, Henryka Dabrowska
Biological indices, biomarkers (EROD activity, DNA SB, 1-OH pyrene), and organochlorine contaminants were investigated in flounder collected in the Gulf of Gdańsk during March-December 2011 to describe their seasonal variability and interrelations. Univariate and multivariate statistics were used to evaluate the relations. The EROD activity positively correlated with DNA SB, both negatively correlated with CF, GSI, and HSI, and there was a moderate positive correlation for EROD and DNA SB with 1-OH pyrene...
December 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29247036/erratum-for-ito-et-al-identification-of-the-hcb-gene-operon-involved-in-catalyzing-aerobic-hexachlorobenzene-dechlorination-in-nocardioides-sp-strain-pd653
#9
Koji Ito, Kazuhiro Takagi, Akio Iwasaki, Naoto Tanaka, Yu Kanesaki, Fabrice Martin-Laurent, Shizunobu Igimi
No abstract text is available yet for this article.
January 1, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29218409/in-focus-in-hcb
#10
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
December 7, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29215671/the-role-of-structure-and-the-metal-ion-in-the-fluorescence-sensing-of-nitro-compounds-for-a-series-of-lanthanide-iii-9-10-anthracene-dicarboxylate-coordination-polymers
#11
Hong Sheng Quah, Li Ting Ng, Jagadese J Vittal
Twenty-eight lanthanide coordination polymers (CPs) containing 9,10-anthracene dicarboxylate (ADC) linkers have been synthesized and characterized. For the earlier class of lanthanides La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+ and Tb3+, the 3D pcu net was generated from dimethylformamide (DMF) while a 2D hcb net was formed using dimethylacetamide (DMA). Similarly for the later class of lanthanides, Dy3+, Ho3+, Er3+, Tm3+, Yb3+ and Lu3+, a 2D hcb net was formed when dimethylacetamide (DMA) was used. However, the formation of a crystalline product with DMF was possible only when DMSO was added together for these lanthanides, and they yielded 2D structures despite the usage of DMF...
December 7, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29175406/evaluation-of-carbon-isotope-fractionation-during-anaerobic-reductive-dehalogenation-of-chlorinated-and-brominated-benzenes
#12
Seo Yean Sohn, Kevin Kuntze, Ivonne Nijenhuis, Max M Häggblom
Compound specific stable isotope analysis (CSIA) has been established as a useful tool to evaluate in situ biodegradation. Here, CSIA was used to determine microbial dehalogenation of chloro- and bromobenzenes in microcosms derived from Hackensack River sediments. Gas chromatography-isotope ratio mass spectrometry (GC-IRMS) was used to measure carbon isotope fractionation during reductive dehalogenation of hexachlorobenzene (HCB), pentachlorobenzene (PeCB), 1,2,3,5-tetrachlorobenzene (TeCB), 1,2,3,5-tetrabromobenzene (TeBB), and 1,3,5-tribromobenzene (TriBB)...
November 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/29146075/persistent-organic-pollutant-emission-via-dust-deposition-throughout-pakistan-spatial-patterns-regional-cycling-and-their-implication-for-human-health-risks
#13
Muhammad Sohail, Syed Ali Musstjab Akber Shah Eqani, Joel Podgorski, Avit Kumar Bhowmik, Adeel Mahmood, Nadeem Ali, Tara Sabo-Attwood, Habib Bokhari, Heqing Shen
In the current study, Persistent Organic Pollutants (POPs) in outdoor dustfall was monitored for the first time along the Indus river system of Pakistan. Among the studied OCPs (ng/g, dry weight), DDTs (0.16-62) were the predominant contaminants identified in deposited dust followed by HCHs (0.1-10.2), HCB (0.09-7.4) and chlordanes (0.1-2.8). The indicative diagnostic ratio for DDTs and HCHs suggested recent emission of DDTs as well as historical emission of both chemicals in regions where they were used for crop protection and malarial control...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29137744/luminescence-electrochemical-and-photocatalytic-properties-of-sub-micron-nickel-ii-and-cobalt-ii-coordination-polymers-synthesized-by-sonochemical-process
#14
Jun Xuan Li, Yu Feng Li, Li Wei Liu, Guang Hua Cui
Submicron structures of Ni(II)/Co(II)-based coordination polymers (CPs) [Ni(L1)(mip)·H2O]n (1) and {[Co(L2)(mip)]·0·.5H2O}n(2) (L1=1,6-bis(5,6-dimethylbenzimidazole)hexane, L2=1,6-bis(benzimidazole)hexane, H2mip=5-methylisophthalic acid) were obtained by ultrasonic irradiation and structurally characterized by elemental analysis, powder X-ray diffraction and scanning electron microscopy. Structural analysis show that two CPs feature uninodal 3-connected 2D hcb layer, whilst CP 2 is further extended into a 3D complicated supramolecular network by C14-H14⋯O2 hydrogen bonds...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29129429/serum-concentrations-of-organochlorine-compounds-and-predictors-of%C3%A2-exposure-in-children-living-in-agricultural-communities-from-south-eastern-spain
#15
B González-Alzaga, M Lacasaña, A F Hernández, J P Arrebola, I López-Flores, F Artacho-Cordón, J P Bonde, N Olea, C Aguilar-Garduño
BACKGROUND: Information on exposure levels to organochlorine compounds (OCs) in child population is limited, despite their greater vulnerability to the adverse health effects of these chemicals. OBJECTIVE: To determine serum concentrations of 10 OCs (including organochlorine pesticides and polychlorinated biphenyls -PCBs-) in children living in agricultural communities from Almería (South-Eastern Spain), and to identify the main predictors of exposure related to socio-economic characteristics, diet and lifestyle...
November 9, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29128804/hexachlorobenzene-as-a-persistent-organic-pollutant-toxicity-and-molecular-mechanism-of-action
#16
REVIEW
Beata Starek-Świechowicz, Bogusława Budziszewska, Andrzej Starek
Hexachlorobenzene (HCB) is an organochlorine pesticide widely distributed in the environment. Chronic exposure of humans to HCB leads to a number of effects, such as triggering of porphyria, microsomal enzyme induction, thyroid dysfunctions, neurological symptoms, and immunological disorders. In animals, HCB induced hepatic porphyria, neurotoxic effects, and toxic effects on the thyroid function, reproductive system, and immune system. HCB as a dioxin-like compound and a weak ligand of the aryl hydrocarbon receptor (AhR) is a hormonal disruptor...
July 1, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29120176/persistent-organic-pollutants-in-the-east-antarctic-atmosphere-inter-annual-observations-from-2010-2015-using-high-flow-through-passive-sampling
#17
Susan Bengtson Nash, Sean Wild, Darryl W Hawker, Roger Cropp, Hayley Hung, Frank Wania, Hang Xiao, Pernilla Bohlin Nizzetto, Anders Bignert, Sara Broomhall
In the first multi-year sampling effort for POPs in the eastern Antarctic atmosphere, 32 PCBs and 38 organochlorine pesticides were targeted in air collected with a high-flow-through passive sampler. Agricultural chemicals were found to dominate atmospheric profiles, in particular HCB and endosulfan-I, with average concentrations of 12,600 and 550 fg/m3, respectively. HCB showed higher concentrations in the austral summer, indicative of local, temperature-dependent volatilisation, whilst endosulfan-I appeared to show fresh, late-austral-summer input followed by temporally decreasing levels throughout the year...
November 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29119258/in-focus-in-hcb
#18
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
November 9, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29107350/dynamics-of-persistent-organic-pollutants-in-obese-adolescents-during-weight-loss
#19
Govindan Malarvannan, Kim Van Hoorenbeeck, Ann Deguchtenaere, Stijn L Verhulst, Eveline Dirinck, Luc Van Gaal, Philippe G Jorens, Adrian Covaci
We have investigated the dynamics of various persistent organic pollutants (POPs) in the serum of 94 obese adolescents (34 boys and 60 girls: age range 11-19years) before (0M) and after 5months (5M) of undergoing weight loss treatment. Six groups of POPs, such as polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs), chlordane compounds (CHLs), hexachlorocyclohexane isomers (HCHs), hexachlorobenzene (HCB) and polybrominated diphenyl ethers (PBDEs), were detected in all samples in the decreasing order of median levels: DDTs>PCBs>HCB>HCHs>CHLs>PBDEs...
January 2018: Environment International
https://www.readbyqxmd.com/read/29105816/comparison-of-laboratory-derived-biomagnification-factors-for-hexachlorobenzene-in-common-carp-conducted-under-nine-test-conditions
#20
Naoki Hashizume, Yoshiyuki Inoue, Yasuyuki Suzuki, Hidekazu Murakami, Shinichiro Sumi, Takeshi Ishibashi, Tomohiko Yoshida
Nine dietary exposure bioaccumulation fish tests with hexachlorobenzene (HCB) were conducted with common carp to explore how differences in test conditions (different test foods and feeding rates) influenced the lipid-corrected, growth-corrected kinetic BMF (BMFKgL ) value (BMFKgL = BMFKg ×lipid content of test food / lipid content of test fish). The BMFKgL values for HCB differed by approximately a factor of 5 among the tests. The average, median, 95% confidential interval, and coefficient of variation of the BMFKgL values were 0...
November 4, 2017: Environmental Toxicology and Chemistry
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