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https://www.readbyqxmd.com/read/28207869/impact-of-wall-shear-stress-on-initial-bacterial-adhesion-in-rotating-annular-reactor
#1
Thibaut Saur, Emilie Morin, Frédéric Habouzit, Nicolas Bernet, Renaud Escudié
The objective of this study was to investigate the bacterial adhesion under different wall shear stresses in turbulent flow and using a diverse bacterial consortium. A better understanding of the mechanisms governing microbial adhesion can be useful in diverse domains such as industrial processes, medical fields or environmental biotechnologies. The impact of wall shear stress-four values ranging from 0.09 to 7.3 Pa on polypropylene (PP) and polyvinyl chloride (PVC)-was carried out in rotating annular reactors to evaluate the adhesion in terms of morphological and microbiological structures...
2017: PloS One
https://www.readbyqxmd.com/read/28188001/risk-factor-algorithm-used-to-predict-frequent-premature-ventricular-contraction-induced-cardiomyopathy
#2
Kyoung-Min Park, Sung Il Im, Seung-Jung Park, June Soo Kim, Young Keun On
BACKGROUND: Premature ventricular contraction (PVC) QRS duration (QRSd) and high PVCs burden are known as a risk factor of PVC-induced cardiomyopathy (CMP). The aim of this study is to find useful algorithm to predict PVC-induced CMP. METHODS: 180 patients (99 males, 51±14years) with frequent PVCs (>10%/24h), who underwent successful PVC ablation, were studied. Typical PVC-related symptoms were defined as the presence of palpitations or dropped beats during PVC...
February 3, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28185606/measuring-population-fluctuation-of-jatropha-stem-borer-cophes-notaticeps-marshall-in-the-brazilian-cerrado-using-a-new-trap
#3
C M Oliveira, C N Silva, M R Frizzas, A C Dianese
This study aimed to monitor the population fluctuation of Cophes notaticeps (Marshall) (Coleoptera: Curculionidae) in a jatropha (Jatropha curcas L.) plantation in the Federal District, Brazil, through the use of a new trap, combined with different attractive lures and trap colors. The study was conducted at Embrapa Cerrados (Planaltina/DF) in a field trial with 720 plants. The new trap, named CPAC16, was made with PVC pipes (100 mm in diameter) of about 40 cm in length, with a window (8 × 10 cm2) in its center to enable insect access...
February 10, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28183845/incidence-of-idiopathic-ventricular-arrhythmias-a-population-based-study
#4
Surksha Sirichand, Ammar M Killu, Deepak Padmanabhan, David O Hodge, Alanna M Chamberlain, Peter A Brady, Suraj Kapa, Peter A Noseworthy, Douglas L Packer, Thomas M Munger, Bernard J Gersh, Christopher J McLeod, Win-Kuang Shen, Yong-Mei Cha, Samuel J Asirvatham, Paul A Friedman, Siva K Mulpuru
BACKGROUND: Ventricular tachycardia and premature ventricular complexes (PVCs) most frequently occur in the context of structural heart disease. However, the burden of idiopathic ventricular arrhythmias (IVA) in the general population is unknown. METHODS AND RESULTS: We identified incident cases of IVA between 2005 and 2013 from Olmsted County, Minnesota, using the Rochester Epidemiology Project database. For PVC cohorts, we included those with frequent (defined as ≥100 PVC/24 hours) symptomatic PVCs...
February 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28183669/multi-metal-assessment-on-biofilm-formation-in-offshore-environment
#5
Muthukumar Krishnan, Hans-Uwe Dahms, Palanichamy Seeni, Subramanian Gopalan, Vignesh Sivanandham, Kim Jin-Hyoung, Rathinam Arthur James
Eight metal and non-metal coupons were exposed to seawater in offshore platform laboratory on biofilm formation in seven days of every month interval time for one year period. Among metal coupons, the highest mean heterotrophic biofilm bacteria population (HBBP) ranges were observed in mild steel (MS) coupon (33.03 to 40.00 [×10(4)] CFUscm(-2)) and lowest in copper (Cu) coupon (3.0 to 5.1 [×10(4)] CFUscm(-2)). Non-metal coupons show, highest mean HBBP ranges in glass (GL) coupon (29.6 to 66.0 [×10(4)] CFUscm(-2)) and lowest in polyvinyl chloride (PVC) coupon (34...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28178636/comparison-of-three-corrosion-inhibitors-in-simulated-partial-lead-service-line-replacements
#6
Aki Kogo, Sarah Jane Payne, Robert C Andrews
Partial lead service line replacements (PLSLR) were simulated using five recirculating pipe loops treated with either zinc orthophosphate (1mg/L as P), orthophosphate (1mg/L as P) or sodium silicate (10mg/L). Two pipe loops served as "inhibitor-free" (Pb-Cu) and "galvanic free" (Pb-PVC) controls. Changes in water quality (CSMR [0.2 or 1], conductivity [≈330mS/cm or ≈560mS/cm], chlorine [1.4mg/L]) were not observed to provide a significant impact on lead or copper release, although galvanic corrosion was shown to be a driving factor...
January 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28178216/highly-sensitive-sensors-based-on-metal-oxide-nanocolumns-for-fire-detection
#7
Kwangjae Lee, Young-Seok Shim, Young Geun Song, Soo Deok Han, Youn-Sung Lee, Chong-Yun Kang
A fire detector is the most important component in a fire alarm system. Herein, we present the feasibility of a highly sensitive and rapid response gas sensor based on metal oxides as a high performance fire detector. The glancing angle deposition (GLAD) technique is used to make the highly porous structure such as nanocolumns (NCs) of various metal oxides for enhancing the gas-sensing performance. To measure the fire detection, the interface circuitry for our sensors (NiO, SnO₂, WO₃ and In₂O₃ NCs) is designed...
February 7, 2017: Sensors
https://www.readbyqxmd.com/read/28176255/partial-volume-correction-for-improved-pet-quantification-in-18-f-naf-imaging-of-atherosclerotic-plaques
#8
Jacobo Cal-Gonzalez, Xiang Li, Daniel Heber, Ivo Rausch, Stephen C Moore, Klaus Schäfers, Marcus Hacker, Thomas Beyer
BACKGROUND: Accurate quantification of plaque imaging using (18)F-NaF PET requires partial volume correction (PVC). METHODS: PVC of PET data was implemented by the use of a local projection (LP) method. LP-based PVC was evaluated with an image quality (NEMA) and with a thorax phantom with "plaque-type" lesions of 18-36 mL. The validated PVC method was then applied to a cohort of 17 patients, each with at least one plaque in the carotid or ascending aortic arteries...
February 7, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28169939/precise-measurement-of-the-outer-diameters-of-antibiotic-laden-cement-nails-produced-by-various-sized-thoracostomy-catheter-molds
#9
Cory M Czajka, Ian N Bauer, Stephen J Warner, Robin N Goytia, Mark R Brinker
OBJECTIVES: At our institution, custom made antibiotic-laden cement nails fabricated during surgery using a thoracostomy catheter as a mold is commonly employed to treat long bone infection. As the outer diameter of the nails produced has not previously been described, we designed a study to measure the outer diameter of antibiotic-laden cement nails fashioned using commercially available and commonly utilized thoracostomy catheters of various sizes. METHODS: Six thoracostomy catheters from two different manufactures (Argyle™ PVC Thoracic Catheters, Covidien Ltd...
January 24, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28167081/premature-ventricular-complex-ablation-in-structural-heart-disease
#10
REVIEW
Rakesh Latchamsetty, Frank Bogun
Frequent premature ventricular complexes (PVCs) in patients with underlying structural heart disease, particular after myocardial infarction, can predict increased mortality. Use of antiarrhythmic medications to suppress PVCs in this setting can result in a further increase in mortality. High PVC burdens in patients with structural heart disease can cause or worsen cardiomyopathy and successful elimination of PVCs with catheter ablation can improve or, in some cases normalize, cardiac function. PVCs may also trigger more malignant ventricular arrhythmias, particularly in patients with previous myocardial infarction, and when identified can be mapped and ablated...
March 2017: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/28164193/long-time-and-distance-self-propelling-of-a-pvc-sphere-on-a-water-surface-with-an-embedded-zno-micro-nano-structured-hollow-sphere
#11
Lei Wang, Lujia Yu, Liting Yi, Bin Yuan, Yongping Hou, Xiangfu Meng, Jing Liu
In this research, a zinc oxide micro-/nano-structured hollow sphere (MNHS) with a large specific surface area is applied as energy storage material to encapsulate poly(vinyl chloride) solution and control the fuel release. The sustained release effect of MNHS not only makes the motion more controllable, but enhances the motion time and distance.
February 6, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28161503/an-aluminum-selective-electrode-via-modification-of-pvc-membrane-by-modified-clinoptilolite-nanoparticles-with-hexadecyltrimethyl-ammonium-bromide-hdtma-br-surfactant-containing-arsenazo-iii
#12
Mostafa Mahdavi, Alireza Nezamzadeh-Ejhieh
A modified PVC (polyvinyl chloride) membrane with clinoptilolite nanoparticles/hexadecyltrimethyl ammonium bromide surfactant (HDTMABr)/Arsenazo III: (NSMZ-ARS), was used for construction of Al(III) -selective electrode. The raw and modified samples were characterized by XRD, FTIR, SEM and TEM methods. Among the different tested membranes constructed by raw and modified samples, only, the membrane electrode containing NSMZ-ARS showed a suitable Nernstian response to aluminum in the concentration range of 2...
May 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28161337/thermal-behavior-of-vehicle-plastic-blends-contained-acrylonitrile-butadiene-styrene-abs-in-pyrolysis-using-tg-ftir
#13
Guicai Liu, Yanfen Liao, Xiaoqian Ma
As important plastic blends in End-of-Life vehicles (ELV), pyrolysis profiles of ABS/PVC, ABS/PA6 and ABS/PC were investigated using thermogravimetric-Fourier transform infrared spectrometer (TG-FTIR). Also, CaCO3 was added as plastic filler to discuss its effects on the pyrolysis of these plastics. The results showed that the interaction between ABS and PVC made PVC pyrolysis earlier and HCl emission slightly accelerated. The mixing of ABS and PA6 made their decomposition temperature closer, and ketones in PA6 pyrolysis products were reduced...
February 1, 2017: Waste Management
https://www.readbyqxmd.com/read/28160361/nonmigrating-equivalent-substitutes-for-pvc-dop-formulations-as-shown-by-a-tg-study-of-pvc-with-covalently-bound-peo-ppo-oligomers
#14
Rodrigo Navarro, Tülin Gacal, Melike Ocakoglu, Carolina García, Carlos Elvira, Alberto Gallardo, Helmut Reinecke
Monoamino functionalized ethylenoxide (EO)/propylenoxide oligomers (Jeffamine) are linked chemically to poly(vinyl chloride) (PVC) using trichlorotriazine chemistry in order to prepare nonmigrating internally plasticized materials. The dependence of the plasticizer efficiency on both the number of anchoring points to the chains and the PVC/plasticizer compatibility is investigated using oligomers of different molecular weight and hydrophilic-hydrophobic balance. Hydrophilic oligomers (containing predominantly EO) of molecular weights between 2000 and 5000 g mol(-1) exhibit excellent plasticizer efficiency, nearly identical to di-2-ethylhexylphthalate (DOP) in conventional PVC/DOP mixtures and may therefore be used as nonmigrating equivalents for DOP...
February 3, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28160298/fluoroless-catheter-ablation-of-cardiac-arrhythmias-a-5-year-experience
#15
Mansour Razminia, M Cameron Willoughby, Hany Demo, Hesam Keshmiri, Theodore Wang, Oliver J D'Silva, Terry A Zheutlin, Hakeem Jibawi, Paul Okumale, Richard F Kehoe
BACKGROUND: Catheter ablations have been traditionally performed with the use of fluoroscopic guidance, which exposes the patient and staff to the inherent risks of radiation. We have developed techniques to eliminate the use of fluoroscopy during cardiac ablations and have been performing completely fluoroless catheter ablations on our patients for over 5 years. METHODS: We present a retrospective analysis of the safety, efficacy, and feasibility data from 500 consecutive patients who underwent nonfluoroscopic catheter ablation, targeting a total of 639 arrhythmias, including atrioventricular reciprocating tachycardia (AVRT), atrioventricular nodal reentrant tachycardia (AVNRT), atrial tachycardia (AT), atrial fibrillation (AF), premature ventricular contractions (PVC), and ventricular tachycardia (VT)...
February 3, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28155270/high-strength-nanocomposite-aerogels-of-ternary-composition-poly-vinyl-alcohol-clay-and-cellulose-nanofibrils
#16
Andong Liu, Lilian Medina, Lars A Berglund
Clay aerogels are foam-like materials with potential to combine high mechanical performance with fire retardancy. However, the compression strength of these aerogels is much lower than theoretically predicted values. High-strength aerogels with more than 95% porosity were prepared from a ternary material system based on poly(vinyl alcohol), montmorillonite clay platelets, and cellulose nanofibrils. A hydrocolloidal suspension of the three components was subjected to freeze-drying so that a low-density aerogel foam was formed...
February 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28149586/peripheral-venous-catheter-fracture-with-embolism-into-the-pulmonary-artery
#17
Andrea Dell'Amore, Chady Ammari, Alessio Campisi, Rocco D'Andrea
Peripheral vein catheterization is generally considered a harmless procedure. Venous catheter rupture associated with pulmonary embolism is an unlikely but potentially serious complication. We report a case of a peripheral venous catheter (PVC) fracture with pulmonary artery embolization in the left lower lobe treated successfully by a surgical approach. The positioning of a PVC is not always a harmless procedure. Every time there are difficulties in positioning or in removal of a catheter device, it should be carefully inspected to verify integrity...
December 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28149471/bond-strength-of-adhesive-resin-cement-with-different-adhesive-systems
#18
Fabrizio Lorenzoni E Silva, Saulo Pamato, Milton-Carlos Kuga, Marcus-Vinicius-Reis Só, Jefferson-Ricardo Pereira
BACKGROUND: To assess the immediate bond strength of a dual-cure adhesive resin cement to the hybridized dentin with different bonding systems. MATERIAL AND METHODS: Fifty-six healthy human molars were randomly divided into 7 groups (n=8). After 3 longitudinal sections, the central cuts were included in PVC matrix and were submitted to dentin hybridization according to the groups: G1 - etch & rinse system with 3-step (Apder™ Scotchbond™ Multi-Purpose, 3M ESPE), G2 - etch & rinse system with 3-step (Optibond™ FL, Kerr), G3 - etch & rinse system with 3-step (All-Bond 3®, Bisco), G4 - etch & rinse simplified system (Adper™ Single Bond 2, 3M ESPE), G5 - self-etching system with one step (Bond Force, Tokuyama), G6 - universal system in moist dentin (Single Bond Universal, 3M ESPE), G7 - universal system in dry dentin (Single Bond Universal, 3M ESPE)...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28131057/compatibility-study-of-a-parenteral-microdose-polyethylene-glycol-formulation-in-medical-devices-and-identification-of-degradation-impurity-by-2d-lc-ms
#19
Lulu Dai, Geoffrey K Yeh, Yingqing Ran, Peter Yehl, Kelly Zhang
Polyethylene glycol (PEG) based formulation and polyvinylchloride (PVC) tubing are frequently used for drug delivery and administration. The compatibility of a parenteral drug microdose formulation in intravenous infusion (IV) devices was studied to support the clinical determination of absolute bioavailability by the microdosing method. The investigational microdose formulation containing PEG was found prone to significant loss of potency within hours of storage in the PVC IV tubing due to degradation. Degradation occurred only when both PEG and PVC tubing were present...
January 18, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28130474/design-and-validation-of-the-gi-nec-score-to-prognosticate-overall-survival-in-patients-with-high-grade-gastrointestinal-neuroendocrine-carcinomas
#20
Angela Lamarca, Thomas Walter, Marianne Pavel, Ivan Borbath, Patricia Freis, Barbara Nuñez, Alexa Childs, Mairéad G McNamara, Richard A Hubner, Rocio Garcia-Carbonero, Tim Meyer, Juan W Valle, Jorge Barriuso
BACKGROUND: Prognostic markers for risk stratification of patients with gastrointestinal high-grade neuroendocrine carcinomas (GI-NECs) are lacking; we designed and validated a prognostic score for overall survival (OS). METHODS: Consecutive patients diagnosed in five neuroendocrine specialist European centers were included. Patients were divided into three cohorts: a training cohort (TC), an external validation cohort (EVC), and a prospective validation cohort (PVC)...
January 2017: Journal of the National Cancer Institute
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