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https://www.readbyqxmd.com/read/27916348/blood-transfusion-is-an-independent-predictor-of-morbidity-and-mortality-after-hepatectomy
#1
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
#2
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...
December 1, 2016: 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
#3
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...
November 29, 2016: Chemosphere
https://www.readbyqxmd.com/read/27905059/exposure-to-secondhand-smoke-impairs-fracture-healing-in-rats
#4
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
#5
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
#6
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...
November 3, 2016: 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
#7
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/lc8-dynein-light-chain-promotes-localization-and-function-of-puf-protein-fbf-2-in-germline-progenitor-cells
#8
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, 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 new 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...
November 18, 2016: Development
https://www.readbyqxmd.com/read/27854443/puffed-up-but-shaky-selves-state-self-esteem-level-and-variability-in-narcissists
#9
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
#10
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
#11
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)...
September 28, 2016: American Journal of Surgery
https://www.readbyqxmd.com/read/27798844/post-transcriptional-control-of-executioner-caspases-by-rna-binding-proteins
#12
Deni Subasic, Thomas Stoeger, Seline Eisenring, Ana M Matia-González, Jochen Imig, Xue Zheng, Lei Xiong, Pascal Gisler, Ralf Eberhard, René Holtackers, André P Gerber, Lucas Pelkmans, Michael O Hengartner
Caspases are key components of apoptotic pathways. Regulation of caspases occurs at several levels, including transcription, proteolytic processing, inhibition of enzymatic function, and protein degradation. In contrast, little is known about the extent of post-transcriptional control of caspases. Here, we describe four conserved RNA-binding proteins (RBPs)-PUF-8, MEX-3, GLD-1, and CGH-1-that sequentially repress the CED-3 caspase in distinct regions of the Caenorhabditis elegans germline. We demonstrate that GLD-1 represses ced-3 mRNA translation via two binding sites in its 3' untranslated region (UTR), thereby ensuring a dual control of unwanted cell death: at the level of p53/CEP-1 and at the executioner caspase level...
October 1, 2016: Genes & Development
https://www.readbyqxmd.com/read/27798089/large-cigars-smoking-topography-and-toxicant-exposure
#13
Zachary R Rosenberry, Wallace B Pickworth, Bartosz Koszowski
BACKGROUND: Cigar smoking in the U.S. continues despite decreases in cigarette smoking and increased tobacco control efforts. We compared large cigar and cigarette smoking for use patterns, smoking topography, and toxicant exposure. METHODS: Dual users (n=17, 94% men, 77% African American) smoked ad libitum either their usual cigarette brand or a study large cigar (Phillies Blunt) in two laboratory sessions. Plasma nicotine and exhaled carbon monoxide (COex) were collected before and after smoking...
October 25, 2016: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/27798087/nicotine-and-carbonyl-emissions-from-popular-electronic-cigarette-products-correlation-to-liquid-composition-and-design-characteristics
#14
Ahmad El-Hellani, Rola Salman, Rachel El-Hage, Soha Talih, Nathalie Malek, Rima Baalbaki, Nareg Karaoghlanian, Rima Nakkash, Alan Shihadeh, Najat A Saliba
INTRODUCTION: Available in hundreds of device designs and thousands of flavors, electronic cigarette (ECIG) may have differing toxicant emission characteristics. This study assesses nicotine and carbonyl yields in the most popular brands in the U.S. market. These products included disposable, prefilled cartridge, and tank-based ECIGs. METHODS: Twenty-seven ECIG products of 10 brands were procured and their power outputs were measured. The e-liquids were characterized for pH, nicotine concentration, propylene glycol/vegetable glycerin (PG/VG) ratio, and water content...
October 7, 2016: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/27791519/safety-and-efficacy-of-the-pipeline-embolization-device-for-treatment-of-intracranial-aneurysms-a-pooled-analysis-of-3-large-studies
#15
David F Kallmes, Waleed Brinjikji, Saruhan Cekirge, David Fiorella, Ricardo A Hanel, Pascal Jabbour, Demetrius Lopes, Pedro Lylyk, Cameron G McDougall, Adnan Siddiqui
OBJECTIVE The authors performed a pooled analysis of 3 studies-IntrePED (International Retrospective Study of the Pipeline Embolization Device), PUFS (Pipeline for Uncoilable or Failed Aneurysms Study), and ASPIRe (Aneurysm Study of Pipeline in an Observational Registry)-in order to assess angiographic outcomes and clinical safety of the Pipeline embolization device (PED). METHODS IntrePED was a retrospective study, while PUFS and ASPIRe were prospective studies. For each patient included in these studies, the authors collected baseline demographic data, aneurysm characteristics, and procedural details...
October 28, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27785935/defense-against-chip-cloning-attacks-based-on-fractional-hopfield-neural-networks
#16
Yi-Fei Pu, Zhang Yi, Ji-Liu Zhou
This paper presents a state-of-the-art application of fractional hopfield neural networks (FHNNs) to defend against chip cloning attacks, and provides insight into the reason that the proposed method is superior to physically unclonable functions (PUFs). In the past decade, PUFs have been evolving as one of the best types of hardware security. However, the development of the PUFs has been somewhat limited by its implementation cost, its temperature variation effect, its electromagnetic interference effect, the amount of entropy in it, etc...
September 9, 2016: International Journal of Neural Systems
https://www.readbyqxmd.com/read/27783960/approaches-for-estimating-puf-air-partitions-coefficient-for-semi-volatile-organic-compounds-a-critical-comparison
#17
Joseph O Okeme, Eva M Webster, J Mark Parnis, Miriam L Diamond
Partition coefficients between polyurethane foam (PUF) and air (KPUF-Air) are important when using PUF as a passive air sampler for semi-volatile organic compounds (SVOCs) and when considering the fate of SVOCs indoors where PUF is a common material. Here, KPUF-Air for selected SVOCs was estimated using published methods, since measured data are unavailable for most of these compounds. Estimates of KPUF-Air were within one order of magnitude for SVOCs having values of log octanol-air partition coefficient (KOA) of 5, but differed by nearly three orders of magnitude for SVOCs with log KOA of 12...
October 23, 2016: Chemosphere
https://www.readbyqxmd.com/read/27782572/the-supersonic-molecular-beam-injector-as-a-reliable-tool-for-plasma-fueling-and-physics-experiment-on-hl-2a
#18
C Y Chen, D L Yu, B B Feng, L H Yao, X M Song, L G Zang, X Y Gao, Q W Yang, X R Duan
On HL-2A tokamak, supersonic molecular beam injection (SMBI) has been developed as a routine refueling method. The key components of the system are an electromagnetic valve and a conic nozzle. The valve and conic nozzle are assembled to compose the simplified Laval nozzle for generating the pulsed beam. The appurtenance of the system includes the cooling system serving the cooled SMBI generation and the in situ calibration component for quantitative injection. Compared with the conventional gas puffing, the SMBI features prompt response and larger fueling flux...
September 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27773989/residual-isocyanates-in-medical-devices-and-products-a-qualitative-and-quantitative-assessment
#19
Gillian Franklin, Homero Harari, Samavi Ahsan, Dhimiter Bello, David A Sterling, Jonathan Nedrelow, Scott Raynaud, Swati Biswas, Youcheng Liu
We conducted a pilot qualitative and quantitative assessment of residual isocyanates and their potential initial exposures in neonates, as little is known about their contact effect. After a neonatal intensive care unit (NICU) stockroom inventory, polyurethane (PU) and PU foam (PUF) devices and products were qualitatively evaluated for residual isocyanates using Surface SWYPE™. Those containing isocyanates were quantitatively tested for methylene diphenyl diisocyanate (MDI) species, using UPLC-UV-MS/MS method...
2016: Environmental Health Insights
https://www.readbyqxmd.com/read/27769481/towards-the-development-of-solid-state-platform-optical-sensors-aggregation-of-gold-nanoparticles-on-polyurethane-foam
#20
Vladimir V Apyari, Viktoria V Arkhipova, Maria V Gorbunova, Pavel A Volkov, Andrey I Isachenko, Stanislava G Dmitrienko, Yury A Zolotov
In this paper, we report on a novel type of nanocomposites based on gold nanoparticles (AuNPs) and polyurethane foam (PUF), which represents an ability of AuNP aggregation on solid polymer matrix with the strongly different selectivity in comparison with aggregation of the same AuNPs in solution. This may indicate that a new type of aggregation takes place, which can be called solid-phase aggregation. A systematic study using diffuse reflectance spectroscopy revealed features of the solid-phase aggregation...
December 1, 2016: Talanta
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