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https://www.readbyqxmd.com/read/28089209/assessment-of-seasonal-variations-in-persistent-organic-pollutants-across-the-region-of-tuscany-using-passive-air-samplers
#1
Victor H Estellano, Karla Pozo, Petra Přibylová, Jana Klánová, Ondřej Audy, Silvano Focardi
Concentrations of persistent organic pollutants (POPs) were measured for an entire year in the region of Tuscany, Italy. Passive air samplers consisting of polyurethane foam (PUF) disks were deployed over four sampling periods of 3-5 months from April 2008 to July 2009 in urban (n = 6) and rural (n = 4) sites. The aim of the study was to characterize the spatial and seasonal variations in selected POPs. The POP concentrations (pg m(-3)) in the air were dominated by dichlorodiphenyltrichloroethane and metabolites (DDTs) and polychlorinated biphenyls (∑7PCBs)...
January 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28088046/application-of-acid-modified-polyurethane-foam-surface-for-detection-and-removing-of-organochlorine-pesticides-from-wastewater
#2
E A Moawed, A M Radwan
The commercial polyurethane foam was acid modified to get an inexpensive adsorbent (AM-PUF) has highly surface polarity and sorption capacity. The elemental analysis, scanning electron microscopy, thermal analysis, ultraviolet/visible/infrared spectroscopies and X-ray diffraction were used for characterization of AM-PUF. The surface of AM-PUF has amorphous character (broadband at 2θ, 21.75°) and contains several active sites e.g. NH, OH, CO, CC and COC groups. The electrical conductivity (σ), iodine value and methylene blue index of AM-PUF are 1...
January 7, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28063657/persistent-organic-pollutants-pops-in-the-atmosphere-of-three-chilean-cities-using-passive-air-samplers
#3
Karla Pozo, Germán Oyola, Victor H Estellano, Tom Harner, Anny Rudolph, Petra Prybilova, Petr Kukucka, Ondrej Audi, Jana Klánová, America Metzdorff, Silvano Focardi
In this study passive air samplers containing polyurethane foam (PUF) disks were deployed in three cities across Chile; Santiago (STG) (n=5, sampling sites), Concepciόn (CON) (n=6) and Temuco (TEM) (n=6) from 2008 to 2009. Polychlorinated biphenyls (PCBs) (7 indicator congeners), chlorinated pesticides hexachlorocyclohexanes (HCHs), dichlorodiphenyl trichloroethanes (DDTs) and flame retardants such as polybrominated diphenyl ethers (PBDEs) were determined by gas chromatography coupled mass spectrometry (GC/MS)...
January 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28033542/panic-attack-history-and-smoking-topography
#4
Samantha G Farris, Lily A Brown, Renee D Goodwin, Michael J Zvolensky
BACKGROUND: Little is known about panic attacks and puffing topography, a behavioral index of the value of smoking reinforcement. This study examined smoking style during the course of smoking of a single cigarette among adult daily smokers with and without a history of panic attacks. METHOD: Participants (n=124, Mage=43.9, SD=9.7; 44.4% female) were non-treatment seeking daily smokers. Lifetime panic attack history was assessed via diagnostic assessment; 28.2% (n=35) of the sample had a panic attack history...
November 24, 2016: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28013137/performance-evaluation-of-malathion-biodegradation-in-batch-and-continuous-packed-bed-bioreactor-pbbr
#5
S R Geed, M K Kureel, B S Giri, R S Singh, B N Rai
The aim of this work was to study the biodegradation of Malathion in batch and continuous packed bed (Polyurethane foam; PUF) bioreactor (PBBR). After 10days, 89% Malathion removal was observed in batch PBBR. Continuous PBBR was operated at various flow rates (5-30mL/h) under optimum condition over a period of 75days. Inlet loading rates and elimination capacities were observed in the range of 36-216 and 7.20-145.4mg/L/day with an average removal efficiency of more than 90% under steady state conditions. GC/MS analysis confirms phosphorodithionicacid,O,O,S-trimethylester and diethylmercaptosuccinate as metabolites...
March 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27998675/occurrence-of-brominated-diphenyl-ethers-dibenzo-p-dioxins-and-dibenzofurans-in-foam-materials-in-scrapped-car-seats-from-1985-to-2012
#6
L Redin, M Niinipuu, S Jansson
The purpose of this study was to evaluate the occurrence of polybrominated diphenyl ethers (PBDEs), dibenzo-p-dioxins (PBDDs) and dibenzofurans (PBDFs) in polyurethane foam (PUF) from car seats of end-of-life vehicles (ELVs) and compare the concentrations of PBDEs with the stipulated regulations in the POP Directive. The method comprised screening by X-ray fluorescence (XRF) and GG-MS analysis. Of 59 tested samples from ELVs, 17 samples showed lines above limit of detection (LOD) levels when screening by XRF...
December 17, 2016: Waste Management
https://www.readbyqxmd.com/read/27966173/development-of-a-magnetic-microbead-affinity-selection-screen-magmass-using-mass-spectrometry-for-ligands-to-the-retinoid-x-receptor-%C3%AE
#7
Michael D Rush, Elisabeth M Walker, Gerd Prehna, Tristesse Burton, Richard B van Breemen
To overcome limiting factors in mass spectrometry-based screening methods such as automation while still facilitating the screening of complex mixtures such as botanical extracts, magnetic microbead affinity selection screening (MagMASS) was developed. The screening process involves immobilization of a target protein on a magnetic microbead using a variety of possible chemistries, incubation with mixtures of molecules containing possible ligands, a washing step that removes non-bound compounds while a magnetic field retains the beads in the microtiter well, and an organic solvent release step followed by LC-MS analysis...
December 13, 2016: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/27939344/a-puf-rna-binding-protein-encoding-gene-plm90-regulates-the-sexual-and-asexual-life-stages-of-the-litchi-downy-blight-pathogen-peronophythora-litchii
#8
Liqun Jiang, Wenwu Ye, Junjian Situ, Yubin Chen, Xinyu Yang, Guanghui Kong, Yaya Liu, Runyanga J Tinashe, Pinggen Xi, Yuanchao Wang, Zide Jiang
Sexual and asexual reproduction are two key processes in the pathogenic cycle of many filamentous pathogens. However in Peronophythora litchii, the causal pathogen for the litchi downy blight disease, critical regulator(s) of sexual or asexual differentiation has not been elucidated. In this study, we cloned a gene named PlM90 from P. litchii, which encodes a putative Puf RNA-binding protein. We found that PlM90 was highly expressed during asexual development, and much higher than that during sexual development, while relatively lower during cyst germination and plant infection...
December 7, 2016: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/27935787/e-cigarette-nicotine-delivery-data-and-learnings-from-pharmacokinetic-studies
#9
Ian M Fearon, Alison Eldridge, Nathan Gale, Christopher J Shepperd, Mike McEwan, Oscar M Camacho, Mitch Nides, Kevin McAdam, Christopher J Proctor
OBJECTIVES: E-cigarettes could potentially play a major role in tobacco harm reduction by delivering nicotine in a vapor containing significantly fewer toxicants than cigarette smoke and may aid smoking behavior changes such as reduction or cessation. METHODS: We examined blood nicotine levels in smokers who were non-accustomed to e-cigarette use (Study 1) and accustomed e-cigarette users (Study 2). We compared nicotine levels when participants used a closed modular system e-cigarette to those when participants smoked a cigarette...
January 2017: American Journal of Health Behavior
https://www.readbyqxmd.com/read/27916348/blood-transfusion-is-an-independent-predictor-of-morbidity-and-mortality-after-hepatectomy
#10
Allison N Martin, Matthew J Kerwin, Florence E Turrentine, Todd W Bauer, Reid B Adams, George J Stukenborg, Victor M Zaydfudim
BACKGROUND: Previous studies have indicated that blood transfusion is associated with increased risk of worse outcomes among patients selected for hepatectomy. However, the independent effect of transfusion has not been confirmed. We hypothesize that blood transfusion is an independent factor that affects outcomes in patients undergoing hepatectomy. MATERIALS AND METHODS: Patients at tertiary care center who underwent hepatectomy between 2006 and 2013 were identified and linked with the American College of Surgeons National Surgical Quality Improvement Program PUF data set...
November 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27916263/polyurethane-foam-puf-disk-passive-samplers-derived-polychlorinated-biphenyls-pcbs-concentrations-in-the-ambient-air-of-bursa-turkey-spatial-and-temporal-variations-and-health-risk-assessment
#11
Aşkın Birgül, Perihan Binnur Kurt-Karakus, Henry Alegria, Elif Gungormus, Halil Celik, Tugba Cicek, Emine Can Güven
Polyurethane foam (PUF) passive samplers were employed to assess air concentrations of polychlorinated biphenyls (PCBs) in background, agricultural, semi-urban, urban and industrial sites in Bursa, Turkey. Samplers were deployed for approximately 2-month periods from February to December 2014 in five sampling campaign. Results showed a clear rural-agricultural-semi-urban-urban-industrial PCBs concentration gradient. Considering all sampling periods, ambient air concentrations of Σ43PCBs ranged from 9.6 to 1240 pg/m(3) at all sites with an average of 24...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27912912/passive-air-sampling-of-persistent-organic-pollutants-pops-and-emerging-compounds-in-kolkata-megacity-and-rural-mangrove-wetland-sundarban-in-india-an-approach-to-regional-monitoring
#12
Karla Pozo, Santosh Kumar Sarkar, Victor H Estellano, Soumita Mitra, Ondrej Audi, Petr Kukucka, Petra Přibylová, Jana Klánová, Simonetta Corsolini
Polyurethane foam (PUF) disk passive air samplers were deployed concurrently at five sites across Kolkata megacity and the rural mangrove wetland of Sundarban (UNESCO World Heritage Site) between January-March in 2014. Samples were analyzed for hexachlorocyclohexanes (HCHs), dichlorodiphenyltricholoroethanes (DDTs), polychlorinated biphenyls (PCBs) and, polybrominated diphenyl ethers (PBDEs) using gas chromatography and mass spectrometry (GC-MS). Derived air concentrations (pg/m(3)) for Kolkata ranged: for ∑α- and γ-HCH between 70 and 207 (114 ± 62), ∑6DDTs: 127-216 (161 ± 36), ∑7PCBs: 53-213 (141 ± 64), and ∑10PBDEs: 0...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27905059/exposure-to-secondhand-smoke-impairs-fracture-healing-in-rats
#13
Hildemberg A R Santiago, Ariane Zamarioli, Manoel D Sousa Neto, Jose B Volpon
BACKGROUND: Nonsmokers may be affected by environmental tobacco smoke (secondhand smoke), but the effects of such exposure on fracture healing have not been well studied. QUESTIONS/PURPOSES: To explore the possible effects of passive inhalation of tobacco smoke on the healing of a diaphyseal fracture in femurs of rats. We hypothesized that secondhand exposure to tobacco smoke adversely affects fracture healing. METHODS: A mid-diaphyseal fracture was created in the femur of 41 female Wistar rats and fixed with an intramedullary metallic pin; 14 rats were excluded (nine for inadequate fractures and five for K wire extrusion)...
November 30, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27884453/a-call-for-a-standardized-definition-of-perforated-appendicitis
#14
Andrew P Rogers, Tiffany J Zens, Charles M Leys, Peter F Nichol, Daniel J Ostlie
BACKGROUND: Abscess rates have been reported to be as low as 1% and as high as 50% following perforated appendicitis (PA). This range may be because of lack of universal definition for PA. An evidence-based definition (EBD) is crucial for accurate wound classification, risk-stratification, and subsequent process optimization. ACS NSQIP-Pediatric guidelines do not specify a definition of PA. We hypothesize that reported postoperative abscess rates underrepresent true incidence, as they may include low-risk cases in final calculations...
October 27, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27866760/polyurethane-foam-impregnated-with-lignin-as-a-filler-for-the-removal-of-crude-oil-from-contaminated-water
#15
O S H Santos, Mercês Coelho da Silva, V R Silva, W N Mussel, M I Yoshida
The present study describes the influence of the concentration of lignin when used as a filler in polyurethane foam for crude oil sorption. The foams (lignin 0-20wt%) were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis, contact angle and density. The FTIR analysis confirmed urethane linkage formation, showing that the chemical structure of the polymer was preserved, despite the addition of different lignin concentrations. Thermogravimetric analysis showed that the presence of lignin has altered the onset temperature (Tonset) of the foams, decreasing as the concentration of lignin is increased...
February 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27865659/using-long-term-air-monitoring-of-semi-volatile-organic-compounds-to-evaluate-the-uncertainty-in-polyurethane-disk-passive-sampler-derived-air-concentrations
#16
Eva Holt, Pernilla Bohlin-Nizzetto, Jana Borůvková, Tom Harner, Jiří Kalina, Lisa Melymuk, Jana Klánová
Much effort has been made to standardise sampling procedures, laboratory analysis, data analysis, etc. for semi volatile organic contaminants (SVOCs). Yet there are some unresolved issues in regards to comparing measurements from one of the most commonly used passive samplers (PAS), the polyurethane foam (PUF) disk PAS (PUF-PAS), between monitoring networks or different studies. One such issue is that there is no universal means to derive a sampling rate (Rs) or to calculate air concentrations (Cair) from PUF-PAS measurements for SVOCs...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27864381/dynein-light-chain-dlc-1-promotes-localization-and-function-of-the-puf-protein-fbf-2-in-germline-progenitor-cells
#17
Xiaobo Wang, Jenessa R Olson, Dominique Rasoloson, Mary Ellenbecker, Jessica Bailey, Ekaterina Voronina
PUF family translational repressors are conserved developmental regulators, but the molecular function provided by the regions flanking the PUF RNA-binding domain is unknown. In C. elegans, the PUF proteins FBF-1 and FBF-2 support germline progenitor maintenance by repressing production of meiotic proteins and use distinct mechanisms to repress their target mRNAs. We identify dynein light chain DLC-1 as an important regulator of FBF-2 function. DLC-1 directly binds to FBF-2 outside of the RNA-binding domain and promotes FBF-2 localization and function...
December 15, 2016: Development
https://www.readbyqxmd.com/read/27854443/puffed-up-but-shaky-selves-state-self-esteem-level-and-variability-in-narcissists
#18
Katharina Geukes, Steffen Nestler, Roos Hutteman, Michael Dufner, Albrecht C P Küfner, Boris Egloff, Jaap J A Denissen, Mitja D Back
Different theoretical conceptualizations characterize grandiose narcissists by high, yet fragile self-esteem. Empirical evidence, however, has been inconsistent, particularly regarding the relationship between narcissism and self-esteem fragility (i.e., self-esteem variability). Here, we aim at unraveling this inconsistency by disentangling the effects of two theoretically distinct facets of narcissism (i.e., admiration and rivalry) on the two aspects of state self-esteem (i.e., level and variability). We report on data from a laboratory-based and two field-based studies (total N = 596) in realistic social contexts, capturing momentary, daily, and weekly fluctuations of state self-esteem...
November 17, 2016: Journal of Personality and Social Psychology
https://www.readbyqxmd.com/read/27825846/pahs-and-pcbs-in-an-eastern-mediterranean-megacity-istanbul-their-spatial-and-temporal-distributions-air-soil-exchange-and-toxicological-effects
#19
Banu Cetin, Fatma Ozturk, Melek Keles, Sema Yurdakul
Istanbul, one of the mega cities in the world located between Asia and Europe, has suffered from severe air pollution problems due to rapid population growth, traffic and industry. Atmospheric levels of PAHs and PCBs were investigated in Istanbul at 22 sampling sites during four different sampling periods using PUF disk passive air samplers and spatial and temporal variations of these chemicals were determined. Soil samples were also taken at the air sampling sites. At all sites, the average ambient air Σ15PAH and Σ41PCB concentrations were found as 85...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27810136/when-body-mass-index-fails-to-measure-up-perinephric-and-periumbilical-fat-as-predictors-of-operative-risk
#20
Luke Martin, Gillian Seton, Booth Aldred, Paul Hopkins, Jessica Chan, Marta E Heilbrun, Mary Mone, Courtney Scaife, William Peche
BACKGROUND: Obesity has been associated with worse outcomes and increased surgical technical difficulty. Perinephric fat (PNF) and periumbilical fat (PUF) are alternative metrics to body mass index. We hypothesized that PUF and PNF would offer improved prediction of perioperative risk. METHODS: 249 patients were retrospectively reviewed after elective, pelvic colorectal resections. PNF and PUF were collected using axial imaging. Operative risk measurements included estimated blood loss (EBL) and operative time (OT)...
December 2016: American Journal of Surgery
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