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https://www.readbyqxmd.com/read/28334449/evaluation-of-the-consequences-of-a-cistern-truck-accident-while-transporting-dangerous-substances-through-a-tunnel
#1
Ziemowit M Malecha, Jarosaw Poliski, Maciej Chorowski
The transportation of dangerous substances by truck carriers harbors important safety issues in both road and mine tunnels. Even though traffic conditions in road and mine tunnels are different, the potential geometric and hydrodynamic similarities can lead to similar effects from the uncontrolled leakage of the dangerous material. This work was motivated by the design study of the LAGUNA-LBNO (Large Apparatus studying Grand Unification and Neutrino Astrophysics and Long Baseline Neutrino Oscillations) project...
March 23, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28329273/is-surgical-resection-superior-to-bronchoscopic-resection-in-patients-with-symptomatic-endobronchial-hamartoma
#2
Sarah M Abdel Hady, Salma E Elbastawisy, Aly S Hassaballa, Hany H Elsayed
A best evidence topic was written according to a structured protocol. The question addressed was: in surgically fit patients with biopsy proven symptomatic endobronchial hamartoma (EH), is surgical resection superior to bronchoscopic resection in terms of outcome. A total of 756 articles were identified using the reported search, of which 8 represented the best evidence to answer the clinical question. The authors, date, journal, country, study type, population, outcomes and key results are tabulated. Three studies included patients who had either bronchoscopic or surgical treatment of EH in the same study...
February 17, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28328019/dopant-assisted-direct-analysis-in-real-time-mass-spectrometry-with-argon-gas
#3
Robert B Cody, A John Dane
RATIONALE: Dopants used with Atmospheric Pressure Photoionization (APPI) were examined with the Direct Analysis in Real Time (DART(®) ) ion source operated with argon gas. Charge-exchange and proton transfer reactions were observed by adding toluene, anisole, chlorobenzene and acetone to the DART gas stream, complementing the information obtained by helium DART. METHODS: Mass spectra were acquired with a time-of-flight mass spectrometer equipped with a DART ion source operated with argon gas...
May 30, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28303583/osteoblast-growth-after-cleaning-of-biofilm-covered-titanium-discs-with-air-polishing-and-cold-plasma
#4
Rutger Matthes, Kathrin Duske, Tewodros Kebede, Christiane Pink, Rabea Schlüter, Thomas von Woedtke, Klaus-Dieter Weltmann, Thomas Kocher, Lukasz Jablonowski
AIM: To investigate the effects of a combined biofilm removal with an optimized air polishing and a cold plasma device on cells in vitro. MATERIALS AND METHODS: A 7-day-old biofilm was removed from rough titanium discs with an air-polishing device with erythritol powder (AP) or with a cold atmospheric pressure argon plasma (CAP) device or in combination of both (AP+CAP). The removal efficacy was evaluated by subsequent cell seeding of osteoblast-like cells (MG-63)...
March 16, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28298097/time-resolved-observation-of-interatomic-excitation-energy-transfer-in-argon-dimers
#5
Tomoya Mizuno, Philipp Cörlin, Tsveta Miteva, Kirill Gokhberg, Alexander Kuleff, Lorenz S Cederbaum, Thomas Pfeifer, Andreas Fischer, Robert Moshammer
The ultrafast transfer of excitation energy from one atom to its neighbor is observed in singly charged argon dimers in a time-resolved extreme ultraviolet (XUV)-pump IR-probe experiment. In the pump step, bound 3s-hole states in the dimer are populated by single XUV-photon ionization. The excitation-energy transfer at avoided crossings of the potential-energy curves leads to dissociation of the dimer, which is experimentally observed by further ionization with a time-delayed IR-probe pulse. From the measured pump-probe delay-dependent kinetic-energy release of coincident Ar(+) + Ar(+) ions, we conclude that the transfer of energy occurs on a time scale of about 800fs...
March 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28296389/abrogated-cell-contact-guidance-on-amino-functionalized-microgrooves
#6
Caroline Mörke, Henrike Rebl, Birgit Finke, Manuela Dubs, Peter Nestler, Aissam Airoudj, Vincent Roucoules, Matthias Schnabelrauch, Andreas Körtge, Karine Anselme, Christiane A Helm, J Barbara Nebe
Topographical and chemical features of biomaterial surfaces affect the cell physiology at the interface and are promising tools for the improvement of implants. The dominance of the surface topography on cell behavior is often accentuated. Striated surfaces induce an alignment of cells and their intracellular adhesion-mediated components. Recently, it could be demonstrated that a chemical modification via plasma polymerized allylamine was not only able to boost osteoblast cell adhesion and spreading but also override the cell alignment on stochastically machined titanium...
March 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28294956/single-target-sputter-deposition-of-alloy-nanoparticles-with-adjustable-composition-via-gas-aggregation-cluster-source
#7
Alexander Vahl, Julian Strobel, Wiebke Reichstein, Oleksandr Polonskyi, Thomas Strunskus, Lorenz Kienle, Franz Faupel
Alloy nanoparticles with variable composition add a new dimension to nanoscience and have hosts of applications. Here we suggest a novel approach for the fabrication of variable composition alloy nanoparticles that is based on a Haberland type gas aggregation cluster source with a custom-made multicomponent target for magnetron sputtering. The approach, which was demonstrated here for gold-rich AgAu nanoparticles, combines a narrow nanoparticle size distribution with in operando variation of composition via the gas pressure as well as highly efficient usage of target material...
March 15, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28292675/removal-of-several-pesticides-in-a-falling-water-film-dbd-reactor-with-activated-carbon-textile-energy-efficiency
#8
Patrick Vanraes, Houria Ghodbane, Dries Davister, Niels Wardenier, Anton Nikiforov, Yannick P Verheust, Stijn W H Van Hulle, Oualid Hamdaoui, Jeroen Vandamme, Jim Van Durme, Pieter Surmont, Frederic Lynen, Christophe Leys
Bio-recalcitrant micropollutants are often insufficiently removed by modern wastewater treatment plants to meet the future demands worldwide. Therefore, several advanced oxidation techniques, including cold plasma technology, are being investigated as effective complementary water treatment methods. In order to permit industrial implementation, energy demand of these techniques needs to be minimized. To this end, we have developed an electrical discharge reactor where water treatment by dielectric barrier discharge (DBD) is combined with adsorption on activated carbon textile and additional ozonation...
March 6, 2017: Water Research
https://www.readbyqxmd.com/read/28292402/endoscopic-treatments-following-bariatric-surgery
#9
REVIEW
Andrew C Storm, Christopher C Thompson
Weight regain after bariatric surgery is common and can be managed with surgical interventions or less morbid endoscopic techniques. These endoscopic approaches target structural postoperative changes that are associated with weight regain, most notably dilation of the gastrojejunal anastomosis aperture. Purse string suture placement, as well as argon plasma coagulation application to the anastomosis, may result in significant and durable weight loss. Furthermore, various endoscopic approaches may be used to safely and effectively manage other complications of bariatric surgery that may result in poor weight loss or weight regain after surgery, including fistula formation...
April 2017: Gastrointestinal Endoscopy Clinics of North America
https://www.readbyqxmd.com/read/28288840/additive-endoscopic-resection-may-be-sufficient-for-the-patients-with-positive-lateral-margin-after-endoscopic-resection-of-early-gastric-cancer
#10
Hae Won Kim, Jie-Hyun Kim, Jun Chul Park, Mi Young Jeon, Yong Chan Lee, Sang Kil Lee, Sung Kwan Shin, Hyun Soo Chung, Sung Hoon Noh, Jong Won Kim, Seung Ho Choi, Jae Jun Park, Young Hoon Youn, Hyojin Park
BACKGROUNDS AND AIM: No well-established treatment strategies exist for lateral margin positivity (LM+) alone after endoscopic resection (ER) of early gastric cancer (EGC). Thus, we aimed to clarify treatment strategy of non-curative resection (non-CR) with LM + alone after ER in EGC. METHODS: Among 2,065 patients with EGC treated by ER, 76 (3.6%) exhibiting only LM+ after non-CR of EGC were reviewed retrospectively. Of these, 28 underwent gastrectomy, 25 argon plasma coagulation (APC), and 23 re-ER...
March 10, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28288459/new-and-advanced-picosecond-lasers-for-tattoo-removal
#11
Maurice A Adatto, Ruthie Amir, Jayant Bhawalkar, Rafael Sierra, Richard Bankowski, Doran Rozen, Christine Dierickx, Moshe Lapidoth
Early methods of tattoo removal ultimately resulted in unacceptable cosmetic outcomes. While the introduction of laser technology was an improvement over the existing chemical, mechanical, and surgical procedures, the use of nonselective tattoo removal with carbon dioxide and argon lasers led to scarring. Q-switched lasers with nanosecond (10-9) pulse domains were considered to have revolutionized tattoo treatment, by selectively heating the tattoo particles, while reducing the adverse sequelae to adjacent normal skin...
2017: Current Problems in Dermatology
https://www.readbyqxmd.com/read/28287651/formation-of-coronene-water-complexes-ftir-study-in-argon-matrices-and-theoretical-characterisation
#12
A Simon, J A Noble, G Rouaut, A Moudens, C Aupetit, C Iftner, J Mascetti
In this paper, we report a combined theoretical and experimental study of coronene:water interactions in low temperature argon matrices. The theoretical calculations were performed using the mixed density functional-based tight binding/force field approach. The results are discussed in the light of experimental matrix isolation FTIR spectroscopic data. We show that, in the solid phase, (C24H12)(H2O)n (n ≤ 6) σ-type complexes, i.e. with water molecules coordinated on the edge of coronene, are formed, whereas in the gas phase, π-interaction is preferred...
March 13, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28285732/a-novel-approach-for-reducing-toxic-emissions-during-high-temperature-processing-of-electronic-waste
#13
R Saini, R Khanna, R K Dutta, R Cayumil, M Ikram-Ul-Haq, V Agarwala, G Ellamparuthy, K Jayasankar, P S Mukherjee, V Sahajwalla
A novel approach is presented to capture some of the potentially toxic elements (PTEs), other particulates and emissions during the heat treatment of e-waste using alumina adsorbents. Waste PCBs from mobile phones were mechanically crushed to sizes less than 1mm; their thermal degradation was investigated using thermo-gravimetric analysis. Observed weight loss was attributed to the degradation of polymers and the vaporization of organic constituents and volatile metals. The sample assembly containing PCB powder and adsorbent was heat treated at 600°C for times ranging between 10 and 30min with air, nitrogen and argon as carrier gases...
March 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28284066/successful-treatment-of-proton-pump-inhibitor-induced-sporadic-fundic-gland-polyps-with-an-argon-plasma-coagulator-in-a-patient-with-polycythaemia-vera
#14
Kazuya Kato, Yoshiaki Iwasaki, Masahiko Taniguchi, Kazuhiko Onodera, Takako Kawakami, Minoru Matsuda, Mineko Higuchi, Kimitaka Kato, Yurina Kato, Susumu Tamakawa, Hiroyuki Furukawa
INTRODUCTION: Proton pump inhibitor (PPI) use is associated with the development of fundic gland polyps (FGPs); discontinuing PPIs is associated with regression of FGPs. Here, we report a rare case of non-respondent FGPs after discontinuation of PPI that were successfully treated using an argon plasma coagulator (APC). PRESENTATION OF CASE: We present the case of a 68-year-old woman with a history of polycytheamia vera. She also had gastroesophageal reflux disease (GERD) and had been taking 10 mg of omeprazole daily for the past three years...
February 24, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28280628/multiple-angiodysplasia-diagnosed-by-capsule-endoscopy
#15
Giulia Diamantini, Giovanni Battista Levi Sandri, Fabio Procacciante
A 28-year-old Caucasian man was admitted in our unit for acute massive rectal bleeding. Past medical and family history was unremarkable. Hemoglobin was 7.6 g/dL. Blood transfusions were required. Computed tomography and gastrointestinal endoscopy were negative for active bleeding. When patient's hemoglobin was normalized and stable, a video capsule endoscopy was performed. Video relieved the presence of multiple digiunal and ileal angiodysplastic lesions. A double endoscopic argon plasma coagulation procedure was planned on general anaesthesia...
February 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28280107/ventilation-heterogeneity-measured-by-multiple-breath-inert-gas-testing-is-not-affected-by-inspired-oxygen-concentration-in-healthy-humans
#16
Susan Roberta Hopkins, Ann R Elliott, Gordon Kim Prisk, Chantal Darquenne
Multiple breath washout (MBW) and oxygen-enhanced MRI techniques use acute exposure to 100% oxygen to measure ventilation heterogeneity. Implicit is the assumption that breathing 100% oxygen does not induce changes in ventilation heterogeneity, however, this is untested. We hypothesized that ventilation heterogeneity decreases with increasing inspired oxygen concentration in healthy subjects. We performed MBW in 8 healthy subjects (4 female, 4 male, Age=43±15y) with normal pulmonary function (FEV1=98±6% predicted) using 10% Argon as a tracer gas and oxygen concentrations of 12...
March 9, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28278107/plasma-treatment-of-polyethersulfone-membrane-for-benzene-removal-from-water-by-air-gap-membrane-distillation
#17
Sara Pedram, Hamid Reza Mortaheb, Farzaneh Arefi-Khonsari
In order to obtain a durable cost-effective membrane for membrane distillation (MD) process, flat sheet polyethersulfone (PES) membranes were modified by an atmospheric pressure nonequilibrium plasma generated using a dielectric barrier discharge in a mixture of argon and hexamethyldisiloxane as the organosilicon precursor. The surface properties of the plasma-modified membranes were characterized by water contact angle (CA), liquid entry pressure, X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy...
March 13, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28275931/the-concentration-of-vanadium-in-pathologically-altered-human-kidneys
#18
Aleksandra Wilk, Barbara Wiszniewska, Dagmara Szypulska-Koziarska, Paulina Kaczmarek, Maciej Romanowski, Jacek Różański, Marcin Słojewski, Kazimierz Ciechanowski, Małgorzata Marchelek-Myśliwiec, Elżbieta Kalisińska
Vanadium has a unique and beneficial effect on both humans and animal organisms; however, excessive amount of the above-mentioned metal can cause many alterations in tissues and organs, including the kidneys. The aim of the study was to determine the concentration of vanadium (V) in the kidneys removed from patients due to lesions of various etiologies, including the rejection of the transplanted kidneys. Additionally, we determined the influence of selected biological and environmental factors on the V concentration...
March 9, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28271096/insights-into-the-enhanced-ce-triple-bond-length-as-m-dash-n-triple-bond-in-the-hce-triple-bond-length-as-m-dash-n-molecule
#19
Zhen Pu, Wenjie Yu, Soumendra K Roy, Chaoyang Li, Bingyun Ao, Tianwei Liu, Maobing Shuai, Xuefeng Wang
Herein, an experimental study of the vibrational spectra of HCeN was carried out in solid argon, followed by theoretical investigations of molecular structures and the nature of Ce[triple bond, length as m-dash]N bond. The absorption band at 937.7 cm(-1) with the 1.0311 (14)N/(15)N isotopic shift ratio is characteristic of Ce[triple bond, length as m-dash]N stretching band for HCeN, showing a 94 cm(-1) higher shift relative to that of the diatomic CeN molecule. This large frequency shift indicates a much stronger Ce[triple bond, length as m-dash]N bond in HCeN, which is confirmed by DFT calculations...
March 8, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28269211/novel-ti-nb-alloys-with-improved-wear-resistance-for-biomedical-implant-application
#20
Praveen Chapala, Swati Ghosh Acharyya, S M Shariff, Ganesh Naik
The present study involved fabrication of titanium niobium based alloys having elastic modulus close to that of human bone and subsequently determining the wear resistance of these alloys for biomedical application. In the present study three beta stabilized titanium niobium alloys having composition Ti-24Nb-4Zr-8Sn, Ti-35Nb-4Sn and Ti-29Nb-13Ta-7Zr were made by vacuum arc melting. The alloys were then aged at 1000 C for 6 hours in an argon atmosphere. Detailed microstructural characterization and phase identification was carried out using scanning electron microscopy and x-ray diffraction respectively...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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