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https://www.readbyqxmd.com/read/28936805/compound-specific-isotopic-and-congener-specific-analyses-of-polychlorinated-biphenyl-in-the-heat-medium-and-rice-oil-of-the-yusho-incident
#1
Takashi Miyawaki, Mari Sugihara, Shusaku Hirakawa, Tsuguhide Hori, Jumboku Kajiwara, Susumu Katsuki, Chikage Mitoma, Masutaka Furue
Compound-specific isotope analysis (CSIA) can be used to examine the source and transformation processes of organic pollutants in the environment. We performed a carbon stable isotope analysis of polychlorinated biphenyl (PCB) congeners in the PCB heat-transfer medium (heat medium) and the original Kanechlor-400 (KC-400, a commercial brand of PCBs) involved in the Yusho incident. The main purpose is to investigate whether isotope fractionation occurred in the rice oil deodorization process that caused the incident...
September 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28935448/perinatal-effects-of-exposure-to-pcbs-on-social-preferences-in-young-adult-and-middle-aged-offspring-mice
#2
Alaa Karkaba, Nidhal Soualeh, Rachid Soulimani, Jaouad Bouayed
In social species, social interactions between conspecifics constitute a fundamental component to establish relations, provide best chances to reproduce, and even improve survival rates. In this study, a three-chambered social approach test was used to estimate the level of sociability and level of preference for social novelty in both male and female young adult (postnatal day (PND) 50) and middle-aged (PND 330) offspring mice (n=10 per group) that were perinatally exposed to a mixture of six polychlorinated biphenyls (PCBs), 28, 52, 101, 138, 153, and 180, at environmentally low doses (10 and 1000ng/kg b...
September 18, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28929363/all-in-one-low-intensity-pulsed-ultrasound-stimulation-system-using-piezoelectric-micromachined-ultrasonic-transducer-pmut-arrays-for-targeted-cell-stimulation
#3
Wonjun Lee, Seungjun Yoo, Joontaek Jung, Woojin Kang, Wei Wang, Cheil Moon, Hongsoo Choi
A novel cell-stimulation system was fabricated using 10 × 29 piezoelectric micromachined ultrasonic transducer (pMUT) arrays for targeted ultrasonic cell stimulation. Both the diameter of a single pMUT element and the edge-to-edge gap were 120 μm, and the size of a pMUT array was 2.27 × 6.84 mm, to be placed at the bottom of a Transwell. The measured resonance frequency of a single pMUT element was 1.48 ± 0.13 MHz and the measured acoustic intensity of the pMUT array was 0.15 ± 0.03 MPa at 1 mm away from the transducer...
September 19, 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28926786/polybrominated-diphenyl-ethers-and-indicator-polychlorinated-biphenyls-in-human-milk-from-china-under-the-stockholm-convention
#4
Lei Zhang, Shuaixing Yin, Yunfeng Zhao, Zhixiong Shi, Jingguang Li, Yongning Wu
Seven congeners of polybrominated diphenyl ethers (PBDEs) (BDE-28, BDE-47, BDE-99, BDE-100, BDE-153,BDE-154 and BDE-183) and six indicator polychlorinated biphenyls (PCBs) (PCB-28, PCB-52, PCB-101, PCB-138, PCB-153 and PCB-180) were measured in 32 regional pooled human milk samples originating from 1760 volunteering primiparous mothers to evaluate the current human body burden of general population and the temporal trend in China. Individual human milk samples were collected following a WHO-designed procedure...
September 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28924500/comparison-of-polybrominated-diphenyl-ethers-pbdes-and-polychlorinated-biphenyls-pcbs-in-the-serum-of-hypothyroxinemic-and-euthyroid-dogs
#5
Grace Lau, Kyla Walter, Philip Kass, Birgit Puschner
OBJECTIVE: To determine the profile of 14 polybrominated diphenyl ethers (PBDEs) and 23 polychlorinated biphenyls (PCBs) in serum of domestic canines and whether this was predictive of thyroid hormone status. SAMPLES: Serum samples were collected from 51 client-owned dogs visiting the University of California Davis William R. Pritchard Veterinary Medical Teaching Hospital during 2012 to 2016 for routine appointments. Fifteen dogs were diagnosed with hypothyroxinemia while 36 were euthyroid...
2017: PeerJ
https://www.readbyqxmd.com/read/28921971/paper-sensor-coated-with-a-poly-carboxybetaine-multiple-dopa-conjugate-via-dip-coating-for-biosensing-in-complex-media
#6
Fang Sun, Kan Wu, Hsiang-Chieh Hung, Peng Zhang, Xinran Che, Joshua Kenyon Smith, Xiaojie Lin, Bowen Li, Priyesh Jain, Qiuming Yu, Shaoyi Jiang
Cellulose paper is an ideal diagnostic platform for low-cost, easily disposable and lightweight implementation, but requires surface modification to achieve detection with high sensitivity and specificity in complex media. In this work, a polymer-catechol conjugate containing a super-hydrophilic nonfouling poly(carboxylbetaine) (pCB) and four surface-binding L-3,4-dihydroxyphenylalanine (DOPA) groups, pCB-(DOPA)4, were applied onto a paper-based sensor surface via a simple "graft-to" immersion process to render the surface with both nonfouling and protein functionalizable properties...
September 18, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28921373/released-fraction-of-polychlorinated-biphenyls-from-soil-biosolid-system-using-a-leaching-procedure-and-its-comparison-with-bioavailable-fraction-determined-by-wheat-plant-uptake
#7
Lourdes Jachero, Claudio Leiva, Inés Ahumada, Pablo Richter
The bioavailability of polychlorinated biphenyls (PCBs) in soils amended with biosolids was estimated using an aqueous leaching process of the compounds combined with rotating disk sorptive extraction (RDSE), and compared with bioavailability determined through of PCB absorption in wheat plants growing in the same soil-biosolid matrix. The matrices consisted of soil amended with biosolids at doses of 30, 90, and 200 Mg/ha, which increase concomitantly the organic matter content of the matrix. Considering that PCBs were natively absent in both the biosolids and soil used, the compounds were spiked in the biosolids and aged for 10 days...
September 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28920759/spatial-distribution-of-polycyclic-aromatic-hydrocarbon-and-polychlorinated-biphenyl-sources-in-the-nakdong-river-estuary-south-korea
#8
Jun H Lee, Han J Woo, Kap S Jeong, Jeong W Kang, Jae U Choi, Eun J Jeong, Kap S Park, Dong H Lee
Our research team investigated the elemental composition and the presence of various toxic organic compounds, such as polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs), in estuary surface sediments to trace the spatial distribution of the sources of pollution deposited in Nakdong River, Busan, South Korea. The spatial patterns of elemental composition and toxic organic compounds were determined from the measurements of total organic carbon (TOC), total nitrogen, total sulfur, PAHs, and PCBs...
September 18, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28910589/persistent-organic-pollutants-and-related-biological-responses-measured-in-coastal-fish-using-chemical-and-biological-screening-methods
#9
Zhanna Tairova, Jakob Strand, Rossana Bossi, Martin M Larsen, Lars Förlin, Anders Bignert, Jenny Hedman, Jens Gercken, Thomas Lang, Nicolai F Fricke, Gert Asmund, Manhai Long, Eva C Bonefeld-Jørgensen
The aim of this study was to investigate the spatial distribution, levels of dioxin-like compounds (DLC), and biological responses in two fish species. The viviparous eelpout (Zoarces viviparus) was collected from various locations in the Baltic Sea and in fjords of Kattegat and Skagerrak, while shorthorn sculpin (Myoxocephalus scorpius) was obtained at the polychlorinated biphenyl (PCB) polluted site in North West Greenland. Significant differences were detected both in contaminant levels and relative contributions from either polychlorinated dibenzodioxins (PCDD) or polychlorinated dibenzofurans (PCDF or furans) and mono-ortho- and non-ortho (coplanar) polychlorinated biphenyls (dl-PCB)...
September 14, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28903176/assessment-of-pcbs-and-exposure-risk-to-infants-in-breast-milk-of-primiparae-and-multiparae-mothers-in-an-electronic-waste-hot-spot-and-non-hot-spot-areas-in-ghana
#10
Anita Asamoah, David Kofi Essumang, Jens Muff, Sergey V Kucheryavskiy, Erik Gydesen Søgaard
The aim of the study was to assess the levels of PCBs in the breast milk of some Ghanaian women at suspected hotspot and relatively non-hotspot areas and to find out if the levels of these PCBs pose any risk to the breastfed infants. A total of 128 individual human breast milk were sampled from both primiparae and multiparae mothers. The levels of PCBs in the milk samples were compared. Some of these mothers (105 individuals) work or reside in and around Agbogbloshie (hot-spot), the largest electric and electronic waste dump and recycling site in Accra, Ghana...
September 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28898812/formation-of-hydroxylated-and-methoxylated-polychlorinated-biphenyls-by-bacillus-subtilis-new-insights-into-microbial-metabolism
#11
Jianteng Sun, Lili Pan, Lizhong Zhu
The detoxification and degradation of polychlorinated biphenyls (PCBs) have been studied. However, little information is available about the biological mechanisms involved in the metabolism of hydroxylated polychlorinated biphenyls (OH-PCBs) and methoxylated polychlorinated biphenyls (MeO-PCBs) by specific microorganism. In this study, the simultaneous formation of OH-PCB (major metabolite) and MeO-PCB (minor metabolite) was found in Bacillus subtilis after exposure to PCB. Interconversion between MeO-PCB and OH-PCB was also observed and the demethylation ratio of MeO-PCB was higher than the methylation ratio of OH-PCB...
September 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28893719/erratum-prenatal-pbde-and-pcb-exposures-and-reading-cognition-and-externalizing-behavior-in-children
#12
Hongmei Zhang, Kimberly Yolton, Glenys M Webster, Andreas Sjödin, Antonia M Calafat, Kim N Dietrich, Yingying Xu, Changchun Xie, Joseph M Braun, Bruce P Lanphear, Aimin Chen
[This corrects the article DOI: 10.1289/EHP478.].
June 30, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28891928/high-performance-wireless-ammonia-gas-sensors-based-on-reduced-graphene-oxide-and-nano-silver-ink-hybrid-material-loaded-on-a-patch-antenna
#13
Bian Wu, Xingfei Zhang, Beiju Huang, Yutong Zhao, Chuantong Cheng, Hongda Chen
Reduced graphene oxide (rGO) has been studied as a resistive ammonia gas sensor at room temperature. The sensitive hybrid material composed of rGO and nano-silver ink (Ag-ink) was loaded on a microstrip patch antenna to realize high-performance wireless ammonia sensors. The material was investigated using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Firstly, interdigital electrodes (IDEs) printed on the polyethylene terephthalate (PET) by direct printing were employed to measure the variation of resistance of the sensitive material with the ammonia concentration...
September 9, 2017: Sensors
https://www.readbyqxmd.com/read/28890136/identification-of-lipidomic-markers-of-chronic-3-3-4-4-5-pentachlorobiphenyl-pcb-126-exposure-in-the-male-rat-liver
#14
Izabela Kania-Korwel, Xianai Wu, Kai Wang, Hans-Joachim Lehmler
Exposure to PCB 126, an environmentally relevant aryl hydrocarbon receptor agonist, is an environmental factor causing hepatic steatosis in rodent models; however, the lipidome of PCB 126-exposed rats has not been investigated in-depth. The objective of the present study was therefore to characterize dose-dependent changes in the lipid profile in the liver of male Sprague-Dawley rats exposed to PCB 126. Rats were exposed for three month to intraperitoneal injections of 0.01, 0.05 and 0.2μmol/kg bw PCB 126 in corn oil...
September 7, 2017: Toxicology
https://www.readbyqxmd.com/read/28886414/serum-polychlorinated-biphenyls-and-leukocyte-telomere-length-in-a-highly-exposed-population-the-anniston-community-health-survey
#15
Catherine L Callahan, Marian Pavuk, Linda S Birnbaum, Xuefeng Ren, James R Olson, Matthew R Bonner
BACKGROUND: Serum polychlorinated biphenyls (PCBs) have previously been associated with longer leukocyte telomere length (LTL) in most, but not all, of the few previous studies. PCBs were produced in Anniston, Alabama from 1929 to 1971 and participants of the Anniston Community Health Survey (ACHS) were highly exposed. OBJECTIVES: We evaluated serum levels of 35 PCBs and relative telomere length in 559 ACHS participants. METHODS: Relative LTL was measured in DNA extracted from blood clots...
September 5, 2017: Environment International
https://www.readbyqxmd.com/read/28885748/extensive-study-on-physicochemical-properties-of-polychlorinated-biphenyls-in-a-commercial-ion-trap-mass-spectrometer-relevance-in-analytical-and-environmental-chemistry
#16
R Narizzano, F Risso, A Magherini, G Cordone, M Ottonelli, E Smirnova, S Nadotti, L Rivara, R La Rocca, E Magi, S Lottici, S Maggiolo, C E Pepe, M Garbarino
Polychlorinated biphenyls (PCBs) exist as 209 congeners, consisting of biphenyl molecules, where the number and substitution positions of halogen atoms are known to affect industrial uses, environmental transport mechanisms, distribution, fate, and toxicity. The complexity of the problem requires accurate physicochemical studies of an increasing number of congeners in order to understand the environmental and biological processes at play. This work presents a systematic study on the thermodynamic and kinetic properties of PCBs by quadrupole ion trap mass spectrometry...
September 8, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28882586/pcbs-and-measures-of-attention-and-impulsivity-on-a-continuous-performance-task-of-young-adults
#17
Bita Behforooz, Joan Newman, Mia V Gallo, Lawrence M Schell
The present study examines the relationship between current body burden of persistent PCBs and attention and impulsivity in 140 Akwesasne Mohawk young adults aged 17 to 21 whose environment has been contaminated by industrial effluent. Attention and impulsivity were measured by errors of omission, errors of commission, and patterns of reaction time responses on the Conners Continuous Performance Test. The PCB measure was the sum of those persistent PCB congeners detected in 50% of the participants. After adjusting for multiple covariates, regression analyses showed a significant positive relationship between PCB levels and omission scores, but only for males...
September 4, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28878454/effects-of-pelvic-compression-belts-on-the-kinematics-and-kinetics-of-the-lower-extremities-during-sit-to-stand-maneuvers
#18
Jong Moon Kim, Hyun Dong Je, Hyeong-Dong Kim
[Purpose] To investigate the effects of a pelvic compression belt (PCB) and chair height on the kinematics and kinetics of the lower extremity during sit-to-stand (STS) maneuvers in healthy people. [Subjects and Methods] Twenty-two people participated in this study. They were required to perform STS maneuvers under four conditions. Hip joint moment and angular displacement of the hip, knee, and ankle were measured. A PCB was also applied below the anterior superior iliac spine. [Results] The angular displacement of the ankle joint increased while performing STS maneuvers from a normal chair with a PCB in phase 1, and decreased during phase 2 when performing STS maneuvers from a high chair...
August 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28877266/feasibility-of-using-a-hand-held-device-to-characterize-tendon-tissue-biomechanics
#19
Sahand Sohirad, David Wilson, Charlotte Waugh, Evan Finnamore, Alexander Scott
OBJECTIVES: To examine the feasibility of using the MyotonPRO digital palpation device in measuring the transverse stiffness of tendon tissue. DESIGN: Experimental study. METHODS: The MyotonPRO was used to measure the stiffness and related properties of ballistics gel in comparison with an external materials testing system (PCB electronics). The device was then used to measure the same properties of avian Achilles tendons before and after the removal of the overlying skin and subcutaneous tissue...
2017: PloS One
https://www.readbyqxmd.com/read/28876910/dynamic-transgenerational-fate-of-polychlorinated-biphenyls-and-dioxins-furans-in-lactating-cows-and-their-offspring
#20
Christian Bogdal, Selina Züst, Peter Schmid, Tenzing Gyalpo, Anicia Zeberli, Konrad Hungerbühler, Markus Zennegg
We report on two farms in Switzerland heavily contaminated by polychlorinated biphenyls (PCBs) and dioxins (PCDD/Fs), occurring in the first case from diffuse sources and in the second case from PCB-containing wall paint. Extensive measurements of PCBs and PCDD/Fs on site (soil, forage, and paint) and in cattle (blood, fat, and milk) allowed validation of our novel dynamic toxicokinetic model, which includes the transfer of contaminants from the mother cows to their suckling calf and the uptake of soil by grazing cattle...
September 6, 2017: Environmental Science & Technology
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