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https://www.readbyqxmd.com/read/28414730/elements-including-metals-in-the-atomizer-and-aerosol-of-disposable-electronic-cigarettes-and-electronic-hookahs
#1
Monique Williams, Krassimir Bozhilov, Sanjay Ghai, Prue Talbot
OBJECTIVE: Our purpose was to quantify 36 inorganic chemical elements in aerosols from disposable electronic cigarettes (ECs) and electronic hookahs (EHs), examine the effect of puffing topography on elements in aerosols, and identify the source of the elements. METHODS: Thirty-six inorganic chemical elements and their concentrations in EC/EH aerosols were determined using inductively coupled plasma optical emission spectroscopy, and their source was identified by analyzing disassembled atomizers using scanning electron microscopy and energy dispersive X-ray spectroscopy...
2017: PloS One
https://www.readbyqxmd.com/read/28391086/adolescent-smoking-experimentation-as-a-predictor-of-daily-cigarette-smoking
#2
James D Sargent, Joy Gabrielli, Alan Budney, Samir Soneji, Thomas A Wills
OBJECTIVE: The utility of studying substance use during early adolescence depends on how well indicies of lower-level experimentation predict the development of substance use problems. We examined associations between experimental cigarette use at T1, recanting of use 8 months later (T2), and daily smoking at 2 years (T4). METHODS: Longitudinal telephone survey of 6522 US youth aged 10-14, examining lifetime cigarette smoking (none, just puffing, 1-19, 20-100, >100) and recanting (i...
March 28, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28390787/biodegradation-and-kinetic-study-of-benzene-in-bioreactor-packed-with-puf-and-alginate-beads-and-immobilized-with-bacillus-sp-m3
#3
M K Kureel, S R Geed, B S Giri, B N Rai, R S Singh
Benzene removal in free and immobilized cells on polyurethane foam (PUF) and polyvinyl alcohol (PVA)-alginate beads was studied using an indigenous soil bacterium Bacillus sp. M3 isolated from petroleum-contaminated soil. The important process parameters (pH, temperature and inoculums size) were optimized and found to be 7, 37°C and 6.0×10(8)CFU/mL, respectively. Benzene removals were observed to be 70, 84 and 90% within 9days in a free cell, immobilized PVA-alginate beads and PUF, respectively under optimum operating conditions...
March 30, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28375254/initial-tamper-tests-of-novel-tamper-indicating-optical-physical-unclonable-functions
#4
Benjamin R Anderson, Ray Gunawidjaja, Hergen Eilers
Optical physical unclonable functions (O-PUFs) are materials containing a large number of randomly distributed degrees of freedom that can be probed optically. We develop tamper-indicating O-PUF seals using polyurethane adhesives with dispersed nanoparticles, where authentication is performed by use of wavefront-shaping controlled reflection. We test the material's and authentication method's tamper-indicating ability using tampering attacks including: mechanical, thermal, and chemical attacks, with the results demonstrating the material/method's robust tamper-indicating ability...
April 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28365636/image-of-the-month-all-puffed-out-a-case-of-crack-lung
#5
Aryeh Greenberg, Kathryn Stammers, Ian Moonsie, Ricardo J José
No abstract text is available yet for this article.
April 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/28362040/alternating-air-medium-exposure-in-rotating-bioreactors-optimizes-cell-metabolism-in-3d-novel-tubular-scaffold-polyurethane-foams
#6
Claudia Tresoldi, Ilaria Stefani, Gaia Ferracci, Serena Bertoldi, Alessandro F Pellegata, Silvia Farè, Sara Mantero
BACKGROUND: In vitro dynamic culture conditions play a pivotal role in developing engineered tissue grafts, where the supply of oxygen and nutrients, and waste removal must be permitted within construct thickness. For tubular scaffolds, mass transfer is enhanced by introducing a convective flow through rotating bioreactors with positive effects on cell proliferation, scaffold colonization and extracellular matrix deposition. We characterized a novel polyurethane-based tubular scaffold and investigated the impact of 3 different culture configurations over cell behavior: dynamic (i) single-phase (medium) rotation and (ii) double-phase exposure (medium-air) rotation; static (iii) single-phase static culture as control...
March 27, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28342994/persistent-organic-pollutants-pops-in-the-atmosphere-of-coastal-areas-of-the-ross-sea-antarctica-indications-for-long-term-downward-trends
#7
Karla Pozo, Tania Martellini, Simonetta Corsolini, Tom Harner, Victor Estellano, Petr Kukučka, Marie D Mulder, Gerhard Lammel, Alessandra Cincinelli
Passive air samplers were used to evaluate long-term trends and spatial distribution of trace organic compounds in Antarctica. Duplicate PUF disk samplers were deployed at six automatic weather stations in the coastal area of the Ross sea (East Antarctica), between December 2010 and January 2011, during the XXVI Italian Scientific Research Expedition. Among the investigated persistent organic compounds, Hexachlorobenzene was the most abundant, with air concentrations ranging from 0.8 to 50 pg m(-3). In general, the following decreasing concentration order was found for the air samples analyzed: HCB > PeCB > PCBs > DDTs > HCHs...
February 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/28336095/chlorinated-pesticides-and-natural-brominated-anisoles-in-air-at-three-northern-baltic-stations
#8
Terry F Bidleman, Hjalmar Laudon, Olle Nygren, Staffan Svanberg, Mats Tysklind
Polyurethane foam (PUF) disk passive samplers were deployed at one inland and two island locations in the Bothnian Bay region of the northern Baltic Sea. Uptake was linear over 81-147 d and a temperature range of -2.6 to 14.2 °C for organochlorine pesticides (OCPs) and current-use pesticides (CUPs) having log KOA ≥9 at ambient temperatures. Partial saturation of the PUF disks occurred for the more volatile OCPs hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), and for bromoanisoles (BAs), which are products of bromophenols released by natural and anthropogenic sources...
March 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28332915/effects-of-sampling-interval-on-the-passive-air-sampling-of-atmospheric-pcbs-levels
#9
Ahmet Egemen Sakin, Fatma Esen, Yucel Tasdemir
In this study, we collected Polychlorinated biphenyls (PCBs) using passive air samplers (PASs), between February 4, 2013 and February 2, 2014, with the sampling periods ranging from 10 to 60 days. The samples were collected with PASs that contained polyurethane foam (PUF). With these samples, 87 PCB congeners were analyzed. Sampling coefficient (R) values for the four seasons were calculated using both the high volume air sampler (HVAS) and PAS samples collected with the same time interval. The average of the annual concentrations of 87 PCB congeners, calculated using the R values specific to this study, was 234 ± 175 pg/m(3)...
March 23, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28331203/the-role-of-axonal-kv1-channels-in-ca3-pyramidal-cell-excitability
#10
Sylvain Rama, Mickael Zbili, Aurélie Fékété, Mónica Tapia, Maria José Benitez, Norah Boumedine, Juan José Garrido, Dominique Debanne
Axonal ion channels control spike initiation and propagation along the axon and determine action potential waveform. We show here that functional suppression of axonal Kv1 channels with local puff of dendrotoxin (DTx), laser or mechanical axotomy significantly increased excitability measured in the cell body. Importantly, the functional effect of DTx puffing or axotomy was not limited to the axon initial segment but was also seen on axon collaterals. In contrast, no effects were observed when DTx was puffed on single apical dendrites or after single dendrotomy...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28330863/bacterial-virulence-phenotypes-of-escherichia-coli-and-host-susceptibility-determine-risk-for-urinary-tract-infections
#11
Henry L Schreiber, Matt S Conover, Wen-Chi Chou, Michael E Hibbing, Abigail L Manson, Karen W Dodson, Thomas J Hannan, Pacita L Roberts, Ann E Stapleton, Thomas M Hooton, Jonathan Livny, Ashlee M Earl, Scott J Hultgren
Urinary tract infections (UTIs) are caused by uropathogenic Escherichia coli (UPEC) strains. In contrast to many enteric E. coli pathogroups, no genetic signature has been identified for UPEC strains. We conducted a high-resolution comparative genomic study using E. coli isolates collected from the urine of women suffering from frequent recurrent UTIs. These isolates were genetically diverse and varied in their urovirulence, that is, their ability to infect the bladder in a mouse model of cystitis. We found no set of genes, including previously defined putative urovirulence factors (PUFs), that were predictive of urovirulence...
March 22, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28326514/complete-response-to-acupuncture-therapy-in-female-patients-with-refractory-interstitial-cystitis-bladder-pain-syndrome
#12
Mehmet Giray Sönmez, Betül Kozanhan
OBJECTIVES: Interstitial Cystitis/Bladder Pain syndrome (IC/BPS) is a considerable issue in urology and gynecology and unfortunately, the treatment options recommended are not fully efficient. Therefore, in this study we aimed to determine the effectiveness of acupuncture treatment in patients with refractory IC/BPS. MATERIAL AND METHODS: 12 refractory IC/BPS female patients received ten sessions of acupuncture twice a week. The visual analog score (VAS), interstitial cystitis symptom index (ICSI), interstitial cystitis problem index (ICPI), O'Leary-Saint symptom score (OSS), Patient Health Questionnaire (PHQ9), Pelvic pain and urgency & frequency patient symptom scale tests (PUF) and maximum voided volume (MVV) was completed in 1st, 3rd, 6th and 12th months following the treatment...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28320951/recurrent-rewiring-and-emergence-of-rna-regulatory-networks
#13
Daniel Wilinski, Natascha Buter, Andrew D Klocko, Christopher P Lapointe, Eric U Selker, Audrey P Gasch, Marvin Wickens
Alterations in regulatory networks contribute to evolutionary change. Transcriptional networks are reconfigured by changes in the binding specificity of transcription factors and their cognate sites. The evolution of RNA-protein regulatory networks is far less understood. The PUF (Pumilio and FBF) family of RNA regulatory proteins controls the translation, stability, and movements of hundreds of mRNAs in a single species. We probe the evolution of PUF-RNA networks by direct identification of the mRNAs bound to PUF proteins in budding and filamentous fungi and by computational analyses of orthologous RNAs from 62 fungal species...
April 4, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28300677/wound-disruption-after-lower-extremity-bypass-surgery-is-a-predictor-of-subsequent-development-of-wound-infection
#14
Faisal Aziz, Tiffany Bohr, Erik B Lehman
OBJECTIVES: Despite advances in endovascular surgery, lower extremity arterial bypass (LEB) remains the gold standard treatment for severe, symptomatic Peripheral Arterial Disease (PAD). With recent changes in healthcare, there has been an increasing emphasis on reducing the hospital length of stay (LOS). The purpose of this study is to identify the postoperative complications, which occur after discharge from hospital, and to find risk factors for developing such complications. METHODS: The 2013 lower extremity revascularization -targeted American College of Surgeons (ACS-NSQIP) database and generalized 2013 general and vascular surgery ACS-NSQIP PUF were used for this study...
March 11, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28293827/temporal-and-spatial-distributions-of-pbdes-in-atmosphere-at-shanghai-rural-regions-china
#15
Yun-Juan Zhu, Dan Sun, Nuo-Er Yang, Yong-Sheng Ding, Wei-Bing Feng, Wen-Jun Hong, Shi-Mao Zhu, Yi-Fan Li
Atmospheric samples were collected using polyurethane foam (PUF) passive air sampling device for every 3 months from June 2012 to May 2013 in Shanghai rural regions in order to investigate the concentrations, profiles, spatial distributions, and seasonal variations of polybrominated diphenyl ethers (PBDEs). Twelve PBDE congeners (BDE-17, BDE-28, BDE-47, BDE-49, BDE-66, BDE-85, BDE-99, BDE-100, BDE-138, BDE-153, BDE-154, and BDE-183) were measured and analyzed by GC-MS. The results showed that detectable PBDEs were examined in all air samples, which indicated that these pollutants are widespread in the research areas...
March 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28267997/determination-of-polycyclic-aromatic-hydrocarbons-dibenzothiophene-and-alkylated-homologs-in-the-lichen-hypogymnia-physodes-by-gas-chromatography-using-single-quadrupole-mass-spectrometry-and-time-of-flight-mass-spectrometry
#16
William B Studabaker, Keith J Puckett, Kevin E Percy, Matthew S Landis
Development of the Athabasca Oil Sands Region in northeastern Alberta, Canada has contributed polycyclic aromatic hydrocarbons (PAHs) and polycyclic aromatic compounds (PACs), which include alkyl PAHs and dibenzothiophenes, to the regional environment. A new analytical method was developed for quantification of PAHs and PACs in the epiphytic lichen bioindicator species Hypogymnia physodes for use in the development of receptor models for attribution of PAH and PAC concentrations to anthropogenic and natural emission sources...
February 24, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28260376/inducible-control-of-mrna-transport-using-reprogrammable-rna-binding-proteins
#17
Zhanar Abil, Laura F Gumy, Huimin Zhao, Casper C Hoogenraad
Localization of mRNA is important in a number of cellular processes such as embryogenesis, cellular motility, polarity, and a variety of neurological processes. A synthetic device that controls cellular mRNA localization would facilitate investigations on the significance of mRNA localization in cellular function and allow an additional level of controlling gene expression. In this work, we developed the PUF (Pumilio and FBF homology domain)-assisted localization of RNA (PULR) system, which utilizes a eukaryotic cell's cytoskeletal transport machinery to reposition mRNA within a cell...
March 8, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28258020/lower-extremity-bypass-surgery-on-patients-transferred-from-other-hospitals-is-associated-with-increased-morbidity-and-mortality
#18
Faisal Aziz, Youngmin Chu, Erik B Lehman
BACKGROUND: Despite advances in endovascular surgery, lower extremity arterial bypass remains the gold standard treatment for severe, symptomatic peripheral arterial disease (PAD). Patients who are transferred to other hospitals have generally complex medical problems compared to those patients who are directly admitted from home. The purpose of this study is to identify factors associated with an interfacility transfer in patients with PAD and compare the postoperative outcomes of these patients to those who are directly admitted to the hospital...
February 28, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28254025/assessment-of-chapatti-quality-of-wheat-varieties-based-on-physicochemical-rheological-and-sensory-traits
#19
Manju Kundu, Bhupendar Singh Khatkar, Neelam Gulia
Fifty wheat varieties were assessed for chapatti quality using grain characteristics, dough rheological properties and pasting characteristics. Results revealed that 88% of wheat varieties studied were medium-hard to hard based on kernel texture. Water absorption and damaged starch were found to be important parameters for chapatti quality as both parameters had significant positive effect on the pliability and puffing height of chapatti. Protein content and gluten strength parameters like SDS sedimentation volume, dough stability and gluten index were found to have a negative impact on chapatti quality...
July 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28239027/estrous-cycle-stage-dependent-manner-of-type-i-interferon-stimulated-genes-induction-in-the-bovine-endometrium
#20
Takahiro Shirozu, Hiroki Iwano, Takatoshi Ogiso, Toshiyuki Suzuki, Ahmed Z Balboula, Hanako Bai, Manabu Kawahara, Koji Kimura, Hitomi Takahashi, Bai Rulan, Sung-Woo Kim, Yojiro Yanagawa, Masashi Nagano, Kazuhiko Imakawa, Masashi Takahashi
Interferon tau (IFN-τ) is a ruminant-specific type I IFN secreted by a conceptus before its attachment to the uterus. IFN-τ induces the expression of IFN-stimulated genes (ISGs) via the type I IFN receptor (IFNAR), which is composed of IFNAR1 and IFNAR2 subunits in the endometrium. However, expression patterns of IFNARs during the estrous cycle have not been reported. We hypothesized that the response to a type I IFN changes along with IFNARs and the IFN-regulatory factors (IRFs) driving transcription of IFN signal-related genes and modulating a type I IFN signal during the estrous cycle...
February 26, 2017: Journal of Reproduction and Development
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