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https://www.readbyqxmd.com/read/28736049/development-of-a-new-approach-based-on-midwave-infrared-spectroscopy-for-post-consumer-black-plastic-waste-sorting-in-the-recycling-industry
#1
Offer Rozenstein, Eldon Puckrin, Jan Adamowski
Waste sorting is key to the process of waste recycling. Exact identification of plastic resin and wood products using Near Infrared (NIR, 1-1.7µm) sensing is currently in use. Yet, dark targets characterized by low reflectance, such as black plastics, are hard to identify by this method. Following the recent success of Midwave Infrared (MWIR, 3-12µm) measurements to identify coloured plastic polymers, the aim of this study was to assess whether this technique is applicable to sorting black plastic polymers and wood products...
July 20, 2017: Waste Management
https://www.readbyqxmd.com/read/28732995/ultrasonic-assisted-fabrication-and-characterization-of-pvc-sio2-nanocomposites-having-bovine-serum-albumin-as-a-bio-coupling-agent
#2
Shadpour Mallakpour, Hossein Yazdan Nazari
In this work, SiO2 nanoparticles (NPs) were modified with bovine serum albumin (BSA) under ultrasound irradiations as a green and fast route to achieve their good dispersion. Subsequently, different weight percentages of the modified NPs (3, 6, and 9wt%) were incorporated in poly(vinyl chloride) (PVC) as the matrix. Thermogravimetric analysis of the SiO2-BSA NPs indicated that 12wt% of the modifier was loaded on the surface of SiO2 NPs. Encapsulation of the SiO2-BSA resulted in a meaningful improvement in the optical, mechanical and thermal characteristics of the prepared PVC nanocomposites (NCs)...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732984/ultrasonic-assisted-biosurface-modification-of-multi-walled-carbon-nanotubes-with-thiamine-and-its-influence-on-the-properties-of-pvc-tm-mwcnts-nanocomposite-films
#3
Shadpour Mallakpour, Amir Abdolmaleki, Faezeh Azimi
The present paper represents a simple and efficient technique via ultrasonic irradiation, which utilized for chemical treatment of carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) with Thiamine (Tm). Poly(vinyl chloride) (PVC) based nanocomposites (NC)s were prepared by the incorporation of various amounts of modified MWCNTs (4, 8, and 12wt%) within the PVC matrix by blending solution and ultrasonic distribution methods. The morphological, chemical structure and thermal stability of the PVC/Tm-MWCNT NCs were identified via Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, and thermogravimetric analysis...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732034/neglecting-the-call-of-the-wild-captive-frogs-like-the-sound-of-their-own-voice
#4
Luiza Figueiredo Passos, Gerardo Garcia, Robert John Young
Acoustic communication is highly influential in the expression of social behavior by anuran amphibians, transmitting information about the individual's physical condition and motivation. We studied the phonotactic (approach movements) responses of wild and captive male golden mantella frogs to conspecific wild and captive playback calls to determine the impact of captivity on social behaviour mediated by vocalisations. Calls were recorded from one wild and two captive populations. Phonotaxis experiments were then conducted by attracting M...
2017: PloS One
https://www.readbyqxmd.com/read/28731349/improved-metrological-traceability-of-particle-size-values-measured-with-line-start-incremental-centrifugal-liquid-sedimentation
#5
Vikram Kestens, Victoria A Coleman, Pieter-Jan De Temmerman, Caterina Minelli, Holger Woehlecke, Gert Roebben
Line-start incremental centrifugal liquid sedimentation (disc-CLS) is a powerful method to determine particle size. It is based on Stokes' law and on the measurement of particle sedimentation rate through a liquid with a density gradient. Because several of the input quantities of the Stokes' equation cannot be easily determined for this case of a rotating disc, the usual disc-CLS approach relies on calibrating the sedimentation time scale with commercially available PVC reference particles. To use these calibrant particles for establishing metrological traceability, they must fulfil the same requirements as those imposed on a certified reference material, i...
July 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28728505/in-vitro-comparison-of-stone-fragmentation-when-using-various-settings-with-modern-variable-pulse-holmium-lasers
#6
John Roger Bell, Kristina L Penniston, Stephen Y Nakada
INTRODUCTION AND OBJECTIVE There is limited data regarding optimal laser and energy settings during stone fragmentation. We assessed effects on fragmentation using a variety of energy and frequency settings with two laser systems. METHODS Artificial stones were created using BegoStone (Streeper et al 2016). A clear PVC tube with an inner diameter of 13mm was closed at one end with a removable plug to create the in vitro ureteral and calyceal environments. The Lumenis Pulse 120H and the Cook Rhapsody H-30 holmium lasers were studied in the calyceal and ureteral models...
July 20, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28726691/an-exploratory-study-of-the-effects-of-stormwater-pipeline-materials-on-transported-stormwater-quality
#7
Matthias Borris, Heléne Österlund, Jiri Marsalek, Maria Viklander
Implications of three sewer pipe materials (concrete, galvanized corrugated steel, and polyvinyl chloride (PVC)) for stormwater quality were explored in laboratory experiments, in which three types of stormwater, SW1-SW3, were circulated in 0.5 m long sewer pipe sections. SW1 and SW2 represented synthetic rainwater, without and with fine street sediment added (CTSS = 150 mg/L), respectively, and SW3 was actual stormwater with the same sediment addition as SW2. Following 20-min runs, with an equivalent distance of 500 m travelled by water particles, a number of statistically significant changes in the stormwater chemistry were observed: (i) pH of all the simulated stormwaters increased in the concrete pipe (from 7...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726176/quality-assessment-and-public-health-status-of-harvested-rainwater-in-a-peri-urban-community-in-edo-state-of-nigeria
#8
Isoken H Igbinosa, Isoken T Aighewi
The harvested rainwater is an alternative water source in communities where there is limited or scarcity of water distribution system. However, contamination of roof-harvested rainwater is of immense concern to the general public health. Therefore, this study was initiated to assess the levels of physicochemical quality and heavy metal concentrations in the harvested rainwater from Oluku communities in Benin City, Edo State, Nigeria. The roof-harvested rainwater samples were collected from 20 independent different residential households in Oluku communities, between April 2015 and September 2015...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28723110/portable-sensor-for-the-detection-of-choline-and-its-derivatives-based-on-silica-isoporous-membrane-and-gellified-nanointerfaces
#9
Lisiqi Xie, Xiao Huang, Bin Su
A portable amperometric ion sensor was fabricated by integrating silica isoporous membrane (SIM) and organogel composed of polyvinyl chloride and 1,2-dichloroethane (PVC-DCE) on a 3D-printed polymer chip. The detection of ionic species in aqueous samples could be accomplished by adding a microliter of sample droplet to the sensor and by identifying the ion-transfer potential and current magnitude at the water/organogel interface array templated by SIM. Thanks to the ultrasmall channel size (2-3 nm in diameter), high channel density (4 × 10(8) μm(-2)), and ultrathin thickness (80 nm) of SIM, the ensemble of nanoscopic water/organogel (nano-W/Gel) interface array behaved like a microinterface with two back-to-back hemispherical mass diffusion zones...
June 23, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28721518/illusory-visual-depth-reversal-can-modulate-sensations-of-contact-surface
#10
Yuka Igarashi, Keiko Omori, Tetsuya Arai, Yasunori Aizawa
To perceive the external world stably, humans must integrate and manage continuous streams of information from various sensory modalities, in addition to drawing on past experiences and knowledge. In this study, we introduce a novel visuo-tactile illusion elicited by a visual-depth-reversal stimulus. The stimulus (a model of a building) was constructed so as to produce the same retinal image as an opaque cuboid, although it actually consisted of only three PVC boards forming a three-dimensional corner with the hollow inside facing the observer...
July 18, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28716670/nationwide-study-on-peripheral-venous-catheter-associated-bloodstream-infections-in-internal-medicine-departments
#11
María Guembe, María Jesús Pérez-Granda, José Antonio Capdevila, José Barberán, Blanca Pinilla, Pablo Martín-Rabadán, Emilio Bouza
BACKGROUND: The use of peripheral venous catheters (PVCs) has increased outside the intensive care unit, as have rates of peripheral venous catheter associated-bloodstream infection (PVC-BSI). The internal medicine department (IMD) is one of the main wards where PVCs are widely used. However, data on the incidence of PVC-BSI and its characteristics in the IMD are scarce. AIM: Our objective was to assess the incidence of PVC-BSI episodes detected in IMDs in Spain...
July 14, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28713001/comparison-of-the-properties-of-implantable-matrices-prepared-from-degradable-and-non-degradable-polymers-for-bisphosphonate-delivery
#12
Tamás Sovány, Anna Csüllög, Ernő Benkő, Géza Regdon, Klára Pintye-Hódi
The aim of the present study was the development of directly compressed tablets for implantable delivery of risedronate sodium for osteoporosis treatment and the comparison of the mechanism and kinetics of drug release from biogradable (chitosan) and non-degradable (PVC) polymer matrices. The compositions and process parameters were optimized in accordance to a mixed 2 and 3 level full factorial design. Critical Quality Attributes (CQA), such as diametral breaking hardness, porosity and speed of drug dissolution were investigated...
July 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28710187/utility-of-microscope-integrated-optical-coherence-tomography-mioct-in-the-treatment-of-myopic-macular-hole-retinal-detachment
#13
Atul Kumar, Prateek Kakkar, Raghav Dinesh Ravani, Ashish Markan
Macular hole-associated retinal detachment in high myopia is described as a final stage in progression of myopic traction maculopathy (MTM).(1â€"3) Shimada et al(4) described the progressive stages of MTM from macular retinoschisis to serous retinal detachment in high myopia. Stage 4 MTM is characterised as disappearance of retinoschisis with progression to retinal detachment due to macular hole formation. It is hypothesised that vitreoschisis and abnormal vitreo-retinal interface create the premacular tangential traction...
July 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28708198/the-effect-of-radiofrequency-catheter-ablation-of-frequent-premature-ventricular-complexes-and-arrhythmia-burden-on-left-ventricular-function
#14
Agnieszka Wojdyła-Hordyńska, Oskar Kowalski, Grzegorz J Hordyński, Borislav Dinov, Philipp Sommer, Gerhard Hindricks, Piotr Feusette, Arash Arya
BACKGROUND: Frequent premature ventricular complexes (PVC) are related to reversible tachycardia-induced cardiomyopathy. However, the role of arrhythmia burden on the outcome of the catheter ablation has not been fully recognised. AIM: The aim of this study was to assess the effect of catheter ablation and PVC burden in patients with and without structural heart disease (SHD) on left ventricular ejection fraction (LVEF). METHODS: Transthoracic echocardiography was done before and six months after radiofrequency catheter ablation in 109 consecutive patients (61 men, age 55 ± 17 years) with frequent PVCs...
2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28706524/evaluation-of-wild-lentil-species-as-genetic-resources-to-improve-drought-tolerance-in-cultivated-lentil
#15
Linda Y Gorim, Albert Vandenberg
Increasingly unpredictable annual rainfall amounts and distribution patterns have far reaching implications for pulse crop biology. Seedling and whole plant survival will be affected given that water is a key factor in plant photosynthesis and also influences the evolving disease spectrum that affects crops. The wild relatives of cultivated lentil are native to drought prone areas, making them good candidates for the evaluation of drought tolerance traits. We evaluated root and shoot traits of genotypes of cultivated lentil and five wild species grown under two water deficit regimes as well as fully watered conditions over a 13 week period indoors...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28699827/evaluation-of-a-passive-method-for-determining-particle-penetration-through-protective-clothing-materials
#16
Peter A Jaques, Lee Portnoff
The risk of workers' exposure to aerosolized particles has increased with the upsurge in the production of engineered nanomaterials. Currently, a whole-body standard test method for measuring particle penetration through protective clothing ensembles is not available. Those available for respirators neglect the most common challenges to ensembles, because they use active vacuum-based filtration, designed to simulate breathing, rather than the positive forces of wind experienced by workers. Thus, a passive method that measures wind-driven particle penetration through ensemble fabric has been developed and evaluated...
July 12, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28697187/can-semiquantitative-measurements-of-suvmax-and-cut-off-values-differentiate-malignant-from-benign-colorectal-cancer
#17
Tram Nguyen, Søren Hess, Henrik Petersen, Abass Alavi, Poul Flemming Høilund-Carlsen
OBJECTIVE: We investigated maximum standardized uptake value (SUVmax) and cut-off values for differentiation of malignant and benign lesions in colorectal cancer (CC) as multiple studies have questioned their validity. We also investigated more extended indices using common semi-quantification analysis in incidental colorectal findings (ICF). SUBJECTS AND METHODS: Fluorine-18-fluoro deoxy glucose positron emission tomography/computed tomography in 25 patients with a total of 30 focal ICF was retrospectively analysed using dedicated software...
July 12, 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28696102/release-and-gas-particle-partitioning-behaviors-of-short-chain-chlorinated-paraffins-sccps-during-the-thermal-treatment-of-polyvinyl-chloride-flooring
#18
Faqiang Zhan, Haijun Zhang, Jing Wang, Jiazhi Xu, Heping Yuan, Yuan Gao, Fan Su, Jiping Chen
Chlorinated paraffin (CP) mixture is a common additive in polyvinyl chloride (PVC) products as a plasticizer and flame retardant. During the PVC plastic life cycle, intentional or incidental thermal processes inevitably cause an abrupt release of short-chain CPs (SCCPs). In this study, the thermal processing of PVC plastics was simulated by heating PVC flooring at 100-200 °C in a chamber. The 1-h thermal treatment caused the release of 1.9%-10.7% of the embedded SCCPs. A developed emission model indicated that SCCP release was mainly controlled by material-gas partitioning at 100 °C...
July 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28695406/quantification-of-intramyocardial-blood-volume-with-99m-tc-rbc-spect-ct-imaging-a-preclinical-study
#19
Hassan Mohy-Ud-Din, Nabil E Boutagy, John C Stendahl, Zhen W Zhuang, Albert J Sinusas, Chi Liu
BACKGROUND: Currently, there is no established non-invasive imaging approach to directly evaluate myocardial microcirculatory function in order to diagnose microvascular disease independent of co-existing epicardial disease. In this work, we developed a methodological framework for quantification of intramyocardial blood volume (IMBV) as a novel index of microcirculatory function with SPECT/CT imaging of (99m)Tc-labeled red blood cells (RBCs). METHODS: Dual-gated myocardial SPECT/CT equilibrium imaging of (99m)Tc-RBCs was performed on twelve canines under resting conditions...
July 10, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28690260/rapid-quantification-of-n-methyl-2-pyrrolidone-in-polymer-matrices-by-thermal-desorption-gc-ms
#20
Young-Min Kim, Jae Woo Kim, Hye Mi Moon, Min-Jin Lee, Akihiko Hosaka, Atsushi Watanabe, Norio Teramae, Young-Kwon Park, Seung-Woon Myung
Analysis of a residual solvent in polymeric materials has become an important issue due to the increased regulations and standards for its use. N-Methyl-2-pyrrolidone (NMP) is a solvent widely used in many industries and restricted as one of the chemicals under EU REACH regulations due to its potential harmful effects. In this study, thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) is applied for the quantitative analysis of NMP with the use of a polymer-coated sample cup. By using the polymer-coated sample cup, the vaporization of NMP was prevented during waiting time before TD-GC/MS analysis...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
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