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https://www.readbyqxmd.com/read/29777307/in-focus-in-hcb
#1
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
May 18, 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29774142/comparison-of-mri-and-123-i-fp-cit-spect-for-the-evaluation-of-msa-p-clinical-severity
#2
Miki Nishimori, Yoriko Murata, Hitomi Iwasa, Kana Miyatake, Michiko Tadokoro, Shino Kohsaki, Munenobu Nogami, Norihiko Hamada, Hitoshi Ninomiya, Yasushi Osaki, Hirokazu Furuya, Takuji Yamagami
The aim of the present study was to compare the efficacy of magnetic resonance imaging (MRI) and 123 I-labeled 2β-carbomethoxy-3β-(4-iodophenyl)-N-(3-fluoropropyl)nortropane single photon emission computed tomography (123 I-FP-CIT SPECT) for determining the clinical severity of patients with multiple system atrophy with Parkinsonism (MSA-P). MRI and 123 I-FP-CIT SPECT images from 17 patients with MSA-P as diagnosed using the Unified MSA Rating Scale part IV (UMSARS IV) score were compared. Brain MRI scans were available for all 17 patients and 123 I-FP-CIT SPECT images were available for 12 patients...
June 2018: Biomedical Reports
https://www.readbyqxmd.com/read/29764339/determination-of-plasma-concentrations-of-organochlorine-pesticides-and-polychlorinated-biphenyls-in-pet-cats-and-dogs
#3
Oguzhan Yavuz, Handan Hilal Arslan, Cagatay Esin, Yavuz Kursad Das, Abdurrahman Aksoy
The aim of this study was the determination of plasma concentrations of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in cats and dogs and evaluation of their prevalence and possible effects. The concentrations of nine OCPs, such as α-hexachlorocyclohexane (HCH), β-HCH, γ-HCH, hexachlorobenzene (HCB), aldrin, 2,4'-dichlorodiphenyltrichloroethane (2,4'-DDT), 4,4'-DDT, 2,4'-dichlorodiphenyldichloroethylene (2,4'-DDE) and 4,4'-DDE and 16 PCBs (PCB-28, -52, -70, -74, -81, -99, -101, -118, -138, -153, -156, -170, -180, -183, -187 and -208) were evaluated in the plasma samples of pet cats ( n = 15) and dogs ( n = 21)...
January 1, 2018: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29756136/a-triphenylamine-functionalized-luminescent-sensor-for-efficient-p-nitroaniline-detection
#4
Ning-Ning Ji, Zhi-Qiang Shi, Hai-Liang Hu, He-Gen Zheng
The combination of π-conjugated fluorophores within a hybrid system gives rise to a triphenylamine-functionalized material [Zn(bpba)(NO3)] (1) (Hbpba = 4-(bis(4-(pyridin-4-yl)phenyl)amino)benzoic acid). Compound 1 features a 2D + 2D → 2D parallel polycatenation structure with 63-hcb net. Photophysical studies revealed that the title phase showed superior sensitivity towards p-nitroaniline (p-NA) with a low detection limit (down to ∼0.10 ppm). Specifically, following a new detection route, vapor-sensing experiments using a saturated ethanol solution of nitroaromatic isomers have been established for the first time...
May 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29735800/potential-molecular-targets-of-statins-in-the-prevention-of-hepatocarcinogenesis
#5
Ezequiel Ridruejo, Giselle Romero-Caími, María J Obregón, Diana Kleiman de Pisarev, Laura Alvarez
Hepatocellular carcinoma (HCC) represents 90% of liver tumors. Statins, may reduce the incidence of various tumors, including HCC. Antitumoral activities may be mediated by changes in transforming growth factor-beta (TGF-β1) and thyroid hormones (TH) regulation. AIM: The aim of our study is to establish the statins mechanism of action and the potential key molecules involved in an in vivo and in vitro HCC model. MATERIALS AND METHODS: We used two models: in vivo (in rats) using diethylnitrosamine (DEN) and hexachlorobenzene (HCB) to develop HCC, we analyzed cell proliferation parameters (proliferating cell nuclear antigen, PCNA) and cholesterol metabolism (hydroxy-methylglutaryl-CoA reductase, HMGCoAR)...
April 9, 2018: Annals of Hepatology
https://www.readbyqxmd.com/read/29729569/enhanced-organic-contaminants-accumulation-in-crops-mechanisms-interactions-with-engineered-nanomaterials-in-soil
#6
Xiang Wu, Wei Wang, Lizhong Zhu
The mechanism of enhanced accumulation of organic contaminants in crops with engineered nanomaterials (ENMs) were investigated by co-exposure of crops (Ipomoea aquatica Forsk (Swamp morning-glory), Cucumis sativus L. (cucumber), Zea mays L. (corn), Spinacia oleracea L. (spinach) and Cucurbita moschata (pumpkin))to a range of chemicals (polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and polybrominated diphenyl ether (PBDE)) and ENMs (TiO2 , Ag, Al2 O3 , graphene, carbon nanotubes (CNTs)) in soil...
May 2, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29727940/multi-component-determination-of-atmospheric-semi-volatile-organic-compounds-in-soils-and-vegetation-from-tarragona-county-catalonia-spain
#7
Noelia Domínguez-Morueco, Mariana Carvalho, Jordi Sierra, Marta Schuhmacher, José Luis Domingo, Nuno Ratola, Martí Nadal
Tarragona County (Spain) is home to the most important chemical/petrochemical industrial complex in Southern Europe, which raises concerns about the presence and effects of the numerous environmental contaminants. In order to assess the levels and patterns of five classes of semi-volatile organic compounds (SVOCs) - polycyclic aromatic hydrocarbons (PAHs), synthetic musks (SMs), polychlorinated biphenyls (PCBs), brominated flame retardants (BFRs) and one organochlorine pesticide, hexachlorobenzene (HCB), 27 samples of soil and vegetation (Piptatherum L...
August 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29725751/in-focus-in-hcb
#8
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
May 4, 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29705822/background-biomonitoring-of-residue-levels-of-137-pesticides-in-the-blood-plasma-of-the-general-population-in-beijing
#9
Jiaxin Li, Pengsi Wang, Shangmei Shi, Jian Xue
Due to the widespread use of pesticides, human exposure to pesticides is possible and can potentially cause adverse impacts on public health. We measured 137 pesticides including organophosphorus, organochlorine, pyrethroid and carbamate pesticides together with various herbicides in 100 human blood samples collected from the general population in Beijing. The samples were analysed by triple quadrupole tandem gas chromatography-mass spectrometry. In total, 24 organochlorine pesticides, 5 pyrethroid pesticides and 6 organophosphorus pesticides were detected...
April 29, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29702570/dechlorination-of-hexachlorobenzene-in-contaminated-soils-using-a-nanometallic-al-cao-dispersion-mixture-optimization-through-response-surface-methodology
#10
Yuhui Jiang, Yixuan Shang, Shuyao Yu, Jianguo Liu
Hexachlorobenzene (HCB) contamination of soils remains a significant environmental challenge all over the world. Reductive stabilization is a developing technology that can decompose the HCB with a dechlorination process. A nanometallic Al/CaO (n-Al/CaO) dispersion mixture was developed utilizing ball-milling technology in this study. The dechlorination efficiency of HCB in contaminated soils by the n-Al/CaO grinding treatment was evaluated. Response surface methodology (RSM) was employed to investigate the effects of three variables (soil moisture content, n-Al/CaO dosage and grinding time) and the interactions between these variables under the Box-Behnken Design (BBD)...
April 27, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29699815/associations-between-persistent-organic-pollutants-and-metabolic-syndrome-in-morbidly-obese-individuals
#11
S Dusanov, J Ruzzin, H Kiviranta, T O Klemsdal, L Retterstøl, P Rantakokko, R Airaksinen, S Djurovic, S Tonstad
BACKGROUND AND AIMS: Persons with "metabolically healthy" obesity may develop cardiometabolic complications at a lower rate than equally obese persons with evident metabolic syndrome. Even morbidly obese individuals vary in risk profile. Persistent organic pollutants (POPs) are widespread environmental chemicals that impair metabolic homeostasis. We explored whether prevalence of metabolic syndrome in morbidly obese individuals is associated with serum concentrations of POPs...
March 13, 2018: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29651229/polycatenated-2d-hydrogen-bonded-binary-supramolecular-organic-frameworks-sofs-with-enhanced-gas-adsorption-and-selectivity
#12
Jian Lü, Cristina Perez-Krap, Fabien Trousselet, Yong Yan, Nada H Alsmail, Bahar Karadeniz, Nicholas M Jacques, William Lewis, Alexander J Blake, François-Xavier Coudert, Rong Cao, Martin Schröder
Controlled assembly of two-dimensional (2D) supramolecular organic frameworks (SOFs) has been demonstrated through a binary strategy in which 1,4-bis-(4-(3,5-dicyano-2,6-dipyridyl)pyridyl)naphthalene ( 2 ), generated in situ by oxidative dehydrogenation of 1,4-bis-(4-(3,5-dicyano-2,6-dipyridyl)dihydropyridyl)naphthalene ( 1 ), is coupled in a 1:1 ratio with terphenyl-3,3',4,4'-tetracarboxylic acid ( 3 ; to form SOF-8 ), 5,5'-(anthracene-9,10-diyl)diisophthalic acid ( 4 ; to form SOF-9 ), or 5,5'-bis-(azanediyl)-oxalyl-diisophthalic acid ( 5 ; to form SOF-10 )...
April 4, 2018: Crystal Growth & Design
https://www.readbyqxmd.com/read/29627539/drivers-of-the-accumulation-of-mercury-and-organochlorine-pollutants-in-mediterranean-lean-fish-and-dietary-significance
#13
Eva Junqué, Mercè Garí, Rosa Maria Llull, Joan O Grimalt
An integrated assessment of lean fish of commercial value as Hg and organochlorine compound source into the population of the Balearic Islands were reported. Dependences between pollutant concentrations, trophic level, fish species, specimen weight and physical-chemical properties were evaluated. Hg and total DDTs showed highest variability between fish species whereas PCBs and HCB displayed more constant median values. The organochlorine compounds found in highest concentrations were those with highest hydrophobicity, consistently with their higher bioaccumulation potential...
April 5, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29621723/persistent-organic-pollutants-as-predictors-of-increased-fsh-lh-ratio-in-naturally-cycling-reproductive-age-women
#14
Mia V Gallo, Julia Ravenscroft, David O Carpenter, Lawrence M Schell, Akwesasne Task Force On The Environment
Although several recent studies suggest endocrine disrupting compounds, such as polychlorinated biphenyls (PCBs), dichlorodiphenyldichloroethylene (p,p', DDE), and hexachlorobenzene (HCB), target different organs and systems in the body, their impact on female reproductive function in humans is not well characterized. We seek to determine the relationship between several known endocrine disrupting compounds and a marker of ovarian responsivity, the FSH:LH ratio (higher ratio indicates less ovarian responsivity)...
April 2, 2018: Environmental Research
https://www.readbyqxmd.com/read/29621717/circulating-levels-of-perfluoroalkyl-substances-and-left-ventricular-geometry-of-the-heart-in-the-elderly
#15
Ingrid Mobacke, Lars Lind, Linda Dunder, Samira Salihovic, P Monica Lind
AIMS: Some persistent organic pollutants (POPs) such as hexachlorobenzene (HCB) and some polychlorinated biphenyls (PCBs) have been shown to interfere with myocardial function and geometry. We therefore investigated if also another group of POPs: per- and polyfluoroalkyl substances (PFASs) were associated with alterations in left ventricular geometry. METHODS: 801 subjects aged 70 years were investigated in a cross-sectional study within the scope of the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) study...
April 2, 2018: Environment International
https://www.readbyqxmd.com/read/29609149/mechanochemical-formation-of-chlorinated-phenoxy-radicals-and-their-roles-in-the-remediation-of-hexachlorobenzene-contaminated-soil
#16
Shanshan Deng, Nannan Feng, Shaoguo Kang, Jianxin Zhu, Bo Yu, Jing Chen, Xiaofeng Xie
Mechanochemical degradation (MCD) is a promising eco-friendly method to dispose persistent organic pollutants (POPs). Mechanically induced free-radical attack was thought to be one of the key elements in initiating and accelerating the dechlorination and degradation of POPs. In this study, mechanochemical formation of free-radicals and their roles in the remediation of hexachlorobenzene (HCB) contaminated soil were explored using both of experimental analysis and quantum chemical calculations. It was found that chlorinated phenoxy radicals(CB-O) can be produced in the milling process and they played a vital role in the dechlorination of HCB, based on the results of electron spin-resonance (ESR) and X-ray photoelectron spectra (XPS)...
March 26, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29606316/mobile-dynamic-passive-sampling-of-trace-organic-compounds-evaluation-of-sampler-performance-in-the-danube-river
#17
Branislav Vrana, Foppe Smedes, Ian Allan, Tatsiana Rusina, Krzysztof Okonski, Klára Hilscherová, Jiří Novák, Peter Tarábek, Jaroslav Slobodník
A "dynamic" passive sampling (DPS) device, consisting of an electrically driven large volume water pumping device coupled to a passive sampler exposure cell, was designed to enhance the sampling rate of trace organic compounds. The purpose of enhancing the sampling rate was to achieve sufficient method sensitivity, when the period available for sampling is limited to a few days. Because the uptake principle in the DPS remains the same as for conventionally-deployed passive samplers, free dissolved concentrations can be derived from the compound uptake using available passive sampler calibration parameters...
March 29, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29605991/deriving-in-vivo-bioconcentration-factors-of-a-mixture-of-fragrance-ingredients-using-a-single-dietary-exposure-and-internal-benchmarking
#18
Chang-Er L Chen, Karin Löfstrand, Margaretha Adolfsson-Erici, Michael S McLachlan, Matthew MacLeod
Chemicals in mixtures that are hydrophobic with logKow > 4 are potentially bioaccumulative. Here, we evaluate an abbreviated and benchmarked in vivo BCF measurement methodology by exposing rainbow trout to a mixture of eight test chemicals found in fragrance substances and three benchmark chemicals (musk xylene (MX), hexachlorobenzene (HCB) and PCB52) via a single contaminated feeding event followed by a 28-day depuration period. Concentrations of HCB and PCB52 in fish did not decline significantly (their apparent depuration rate constants - kT were close to zero), while kT for MX was 0...
March 31, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29605679/prenatal-exposure-to-endocrine-disrupting-chemicals-and-risk-of-being-born-small-for-gestational-age-pooled-analysis-of-seven-european-birth-cohorts
#19
Eva Govarts, Nina Iszatt, Tomas Trnovec, Marijke de Cock, Merete Eggesbø, Lubica Palkovicova Murinova, Margot van de Bor, Mònica Guxens, Cécile Chevrier, Gudrun Koppen, Marja Lamoree, Irva Hertz-Picciotto, Maria-Jose Lopez-Espinosa, Aitana Lertxundi, Joan O Grimalt, Maties Torrent, Fernando Goñi-Irigoyen, Roel Vermeulen, Juliette Legler, Greet Schoeters
BACKGROUND AND AIMS: There is evidence that endocrine disrupting chemicals (EDCs) have developmental effects at environmental concentrations. We investigated whether some EDCs are associated with the adverse birth outcome Small for Gestational Age (SGA). METHODS: We used PCB 153, p,p'-DDE, HCB, PFOS and PFOA measured in maternal, cord blood or breast milk samples of 5446 mother-child pairs (subset of 693 for the perfluorinated compounds) from seven European birth cohorts (1997-2012)...
March 29, 2018: Environment International
https://www.readbyqxmd.com/read/29587212/first-evaluation-of-the-use-of-down-feathers-for-monitoring-persistent-organic-pollutants-and-organophosphate-ester-flame-retardants-a-pilot-study-using-nestlings-of-the-endangered-cinereous-vulture-aegypius-monachus
#20
Laura Monclús, Manel Lopez-Bejar, Javier De la Puente, Adrian Covaci, Veerle L B Jaspers
Raptor feathers have been increasingly used to assess pollutants in ecotoxicological monitoring studies. However, the suitability of down feathers to detect pollutants has not yet been investigated. In this study, concentrations of persistent organic pollutants (POPs) and organophosphate ester flame retardants (OPEs) were assessed in down and juvenile contour feathers of Spanish cinereous vulture (Aegypius monachus) nestlings (circa 73 days old) and contaminant concentrations were compared between both types of feathers from the same individuals...
March 24, 2018: Environmental Pollution
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