keyword
MENU ▼
Read by QxMD icon Read
search

PVC

keyword
https://www.readbyqxmd.com/read/28934708/different-partition-of-polycyclic-aromatic-hydrocarbon-on-environmental-particulates-in-freshwater-microplastics-in-comparison-to-natural-sediment
#1
Wenfeng Wang, Jun Wang
Microplastics pollution in the aquatic ecosystems has aroused increasing concerns in recent years. Though microplastics are known to sorb organic contaminants from water, the interaction mechanisms between microplastics and organic chemicals are not yet well understood. Here we investigated the partition characteristics of phenanthrene (Phe) in three mass-produced plastic particles, including polyethylene (PE), polystyrene (PS) and polyvinylchloride (PVC), and one natural sediment, as a comparison. The sorption kinetics of Phe onto microplastics and natural sediment were successfully described by the pseudo-second-order model (R(2) > 0...
September 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28929660/-establishment-of-biological-assess-for-quality-control-of-fuzi-based-on-determination-of-premature-ventricular-contractions-in-rats
#2
Zhi-Hao Zhao, Ding-Kun Zhang, Ming-Quan Wu, Chun-Yu Li, Li-Juan Cao, Ping Zhang, Cui-Zhe Liu, Jia-Bo Wang, Xiao-He Xiao
Aconiti Lateralis Radix (Fuzi) is a toxic traditional Chinese medicine with definite efficacy. In order to improve the quality control of its different prepared products and ensure the security in clinic, it is significant to establish a method of quality evaluation related to clinic adverse effects. Aiming at the important biological marker of early cardiac toxicity reaction, there was no method to detect it. In this manuscript, a novel approach for measuring the minimal toxic dose (MTD) of premature ventricular contractions (PVC) poisoning of rats was established...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28925684/carbon-nanotube-based-ion-selective-sensors-for-wearable-applications
#3
Soumyendu Roy, Moshe David-Pur, Yael Hanein
Wearable electronics offer new opportunities in a wide range of applications, especially sweat analysis using skin sensors. A fundamental challenge in these applications is the formation of sensitive and stable electrodes. In this article we report the development of a wearable sensor based on carbon nanotube (CNT) electrode arrays for sweat sensing. Solid-state ion selective electrodes (ISEs), sensitive to Na+ ions, were prepared by drop coating plasticized poly-vinyl chloride (PVC) doped with ionophore and ion exchanger on CNT electrodes...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28922631/surface-modification-of-platelet-concentrate-bags-to-reduce-biofilm-formation-and-transfusion-sepsis
#4
Joels S T Wilson-Nieuwenhuis, Nina Dempsey-Hibbert, Christopher M Liauw, Kathryn A Whitehead
Bacterial contamination of blood products poses a major risk in transfusion medicine, including transfusions involving platelet products. Although testing systems are in place for routine screening of platelet units, the formation of bacterial biofilms in such units may decrease the likelihood that bacteria will be detected. This work determined the surface properties of p-PVC platelet concentrate bags and investigated how these characteristics influenced biofilm formation. Serratia marcescens and Staphylococcus epidermidis, two species commonly implicated in platelet contamination, were used to study biofilm growth...
September 7, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28919593/electrocardiographic-algorithms-to-guide-a-management-strategy-of-idiopathic-outflow-tract-ventricular-arrhythmias
#5
Bartosz Ludwik, Karol Deutsch, Mariusz Mazij, Janusz Śledź, Aleksandra Morka, Michał Labus, Michał Chrabąszcz, Bartosz Szafran, Jerzy Śpikowski, Lesław Szydłowski, Sebastian M Stec
INTRODUCTION    The current guidelines of the European Society of Cardiology outlined electrocardiographic (ECG) differentiation of site of origin (SOO) in patients with idiopathic ventricular arrhythmias (IVA).  OBJECTIVES    The aim of this study was to compare three ECG algorithms for differentiating SOO and to determine their diagnostic value for the management of outflow tract IVA. PATIENTS AND METHODS    Patients with IVA with inferior axis who underwent successful radiofrequency catheter ablation (RFCA) using the 3D-electroanatomical system were analyzed...
September 6, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28917560/outcomes-of-rescue-cardiopulmonary-support-for-periprocedural-acute-hemodynamic-decompensation-in-patients-undergoing-catheter-ablation-of-electrical-storm
#6
Andres Enriquez, Jackson Liang, Javier Gentile, Robert Schaller, Gregory Supple, David S Frankel, Fermin Garcia, Joyce Wald, Edo Y Birati, J Eduardo Rame, Christian Bermudez, David Callans, Francis Marchlinski, Pasquale Santangeli
BACKGROUND: In patients with ventricular tachycardia/fibrillation (VT/VF) electrical storm (ES) undergoing catheter ablation (CA), hypotension due to refractory VT/VF, use of anesthesia and cardiac stunning due to repeated ICD shocks might precipitate acute hemodynamic decompensation (AHD). OBJECTIVE: We evaluated the outcomes of emergent cardiopulmonary support with extracorporeal membrane oxygenation (ECMO) to rescue AHD in patients undergoing CA of ES. METHODS: Between 2010 and 2016, 21 patients with ES (VT in 11 and PVC-triggered VF in 10) were referred for CA and had periprocedural AHD requiring emergent ECMO support...
September 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28916173/a-new-anatomical-view-on-the-vector-cardiogram-the-mean-temporal-spatial-isochrones
#7
Peter M van Dam
AIM: This proof of principle study aims to show the direct relationship between cardiac anatomy and the mean cardiac activation path as captured by the 12 lead ECG derived mean temporal-spatial isochrones (mean TSI) path. METHODS: To obtain the mean TSI signal a vector cardiographic (VCG) signal is constructed from the 12 lead ECG. The construction of the VCG signal uses a model of the heart and torso with patient specific electrode extracted from a 3D photo. The propagation of the activation through the heart is captured by estimating the mean of a cardiac activation isochrone using this VCG signal...
August 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28916109/systematic-approach-in-mg-2-ions-analysis-with-a-combination-of-tailored-fluorophore-design
#8
L Lvova, C Guanais Gonçalves, L Prodi, M Sgarzi, N Zaccheroni, M Lombardo, A Legin, C Di Natale, R Paolesse
A systematic study of a series of diaza-18-crown-6 8-hydroxyquinoline (DCHQ) chemosensors, devoted to Mg(II) ion detection, was performed. Functionalization of DCHQ by peripheral substituents allowed the development of novel all-solid-state optodes via inclusion inside PVC-based polymeric films. The influence on the DCHQ-based optode response of the lipophilic sites functionalization and of the nature of the plasticizer, was investigated. Fluorimetric studies on optodes sensitivity towards a number of different metal cations (Ca(2+), Na(+), K(+), Li(+), Co(2+), Cd(2+), Pb(2+), Cu(2+), Hg(2+), Zn(2+)) and NH4(+) were carried out...
October 2, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28916033/ca-2-detection-utilising-algan-gan-transistors-with-ion-selective-polymer-membranes
#9
Mohsen Asadnia, Matthew Myers, Gilberto A Umana-Membreno, Tarun M Sanders, Umesh K Mishra, Brett D Nener, Murray V Baker, Giacinta Parish
We demonstrate highly selective and sensitive potentiometric ion sensors for calcium ion detection, operated without the use of a reference electrode. The sensors consist of AlGaN/GaN heterostructure-based transistor devices with chemical functionalisation of the gate area using poly (vinylchloride)-based (PVC) membranes having high selectivity towards calcium ions, Ca(2+). The sensors exhibited stable and rapid responses when introduced to various concentrations of Ca(2+). In both 0.01 M KCl and 0.01 M NaCl ionic strength buffer solutions, the sensors exhibited near Nernstian responses with detection limits of less than 10(-7) M, and a linear response range between 10(-7)-10(-2) M...
September 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28915543/effects-of-diisononyl-phthalate-on-danio-rerio-reproduction
#10
Stefania Santangeli, Francesca Maradonna, Maya Zanardini, Valentina Notarstefano, Giorgia Gioacchini, Isabel Forner-Piquer, Hamid Habibi, Oliana Carnevali
Di-isononyl phthalate (DiNP) is a high molecular weight phthalate commonly used as a plasticizer. It was introduced as a replacement for bis (2-ethylhexyl) phthalate (DEHP) which is used in the production of plasticized polyvinyl chloride (PVC). The purpose of this study was to investigate for the first time the effect of DiNP on female reproductive physiology in Danio rerio. Fish were exposed to five different doses of DiNP plus control (0 μg/L; 0.42 μg/L; 4.2 μg/L; 42 μg/L; 420 μg/L; 4200 μg/L) for a period of 21 days...
September 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28913651/outcomes-of-percutaneous-portal-vein-intervention-in-a-single-uk-paediatric-liver-transplantation-programme
#11
Ravi Patel, Jeevan Mahaveer, Nasim Tahir, Sanjay Rajwal, Patricia McClean, Jai V Patel
INTRODUCTION: Percutaneous transluminal angioplasty (PTA), with or without stent placement, has become the treatment of choice for portal vein complications (PVC) following liver transplantation. We aimed to assess long-term outcomes of intervention in paediatric transplant recipients, in a single institution. MATERIALS AND METHODS: 227 children received 255 transplants between November 2000 and September 2016. 30 patients developed PVC of whom 21 had percutaneous intervention...
September 14, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28910582/model-based-performance-and-energy-analyses-of-reverse-osmosis-to-reuse-wastewater-in-a-pvc-production-site
#12
Kang Hu, Thorsten Fiedler, Laura Blanco, Sven-Uwe Geissen, Simon Zander, David Prieto, Angeles Blanco, Carlos Negro, Nathalie Swinnen
A pilot-scale reverse osmosis (RO) followed behind a membrane bioreactor (MBR) was developed for the desalination to reuse wastewater in a PVC production site. The solution-diffusion-film model (SDFM) based on the solution-diffusion model (SDM) and the film theory was proposed to describe rejections of electrolyte mixtures in the MBR effluent which consists of dominant ions (Na(+) and Cl(-)) and several trace ions (Ca(2+), Mg(2+), K(+) and SO4(2-)). The universal global optimisation method was used to estimate the ion permeability coefficients (B) and mass transfer coefficients (K) in SDFM...
September 14, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28901351/all-solid-state-ion-selective-electrodes-with-redox-active-lithium-sodium-and-potassium-insertion-materials-as-the-inner-solid-contact-layer
#13
Shinichi Komaba, Tatsuya Akatsuka, Kohei Ohura, Chihiro Suzuki, Naoaki Yabuuchi, Shintaro Kanazawa, Kazuhiko Tsuchiya, Taku Hasegawa
All-solid-state ion-selective electrodes as potentiometric ion sensors for lithium, sodium, and potassium have been demonstrated by installing a composite layer containing a powder of alkali insertion materials, LixFePO4, Na0.33MnO2, and KxMnO2·nH2O, respectively, as an inner solid-contact layer between the electrode substrate and plasticized poly(vinyl chloride) (PVC)-based ion-sensitive membrane containing the corresponding ionophores for Li(+), Na(+), and K(+) ions. These double-layer ion-selective electrodes, consisting of the composite and PVC layers prepared by a simple drop cast method, exhibit a quick potential response (less than 5 s) to each alkali-metal ion with sufficient Nernstian slopes of calibration curves, ca...
September 13, 2017: Analyst
https://www.readbyqxmd.com/read/28893586/effects-of-diisononyl-phthalate-on-osteopenia-in-intact-mice
#14
Yun-Ho Hwang, Young-Jin Son, Man-Jeong Paik, Sung-Tae Yee
Osteopenia is characterized by bone loss and deterioration of trabecular bone, which leads to osteoporotic fractures. This disease is highly prevalent in industrialized areas and is associated with exposure to endocrine disrupting chemicals (EDCs). Diisononyl phthalate (DINP) is one of these EDCs and is mainly used as a plasticizer in flexible polyvinyl chloride (PVC) products. Although it is well known that exposure to DINP is harmful to humans, no studies have been reported concerning its contribution to osteopenia...
September 8, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28892841/movement-of-traditional-fecal-indicator-bacteria-and-source-tracking-targets-through-septic-drainfields
#15
Hannah Billian, Leigh-Anne Krometis, Theresa Thompson, Charles Hagedorn
The past three decades' data on outbreaks in the United States indicate that homes dependent on untreated groundwater (e.g. wells) for household drinking water that are also reliant on onsite treatment of household wastewater (e.g. septic systems) may be at greater risk for waterborne disease. While groundwater quality monitoring to protect public health has traditionally focused on the detection of fecal indicator bacteria, the application of emerging source tracking strategies may offer a more efficient means to identify pollution sources and effective means of remediation...
September 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28891944/new-tetra-schiff-bases-as-efficient-photostabilizers-for-poly-vinyl-chloride
#16
Dina S Ahmed, Gamal A El-Hiti, Ayad S Hameed, Emad Yousif, Ahmed Ahmed
Three new tetra-Schiff bases were synthesized and characterized to be used as photostabilizers for poly(vinyl chloride) (PVC) films. The photostability of PVC films (40 μm thickness) in the presence of Schiff bases (0.5 wt %) upon irradiation (300 h) with a UV light (λmax = 365 nm and light intensity = 6.43 × 10(-9) ein∙dm(-3)∙s(-1)) was examined using various spectroscopic measurements and surface morphology analysis. The changes in various functional groups' indices, weight and viscosity average molecular weight of PVC films were monitored against irradiation time...
September 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28881329/a-reusable-adsorbent-polyethylenimine-polyvinyl-chloride-crosslinked-fiber-for-pd-ii-recovery-from-acidic-solutions
#17
Han Ah Choi, Ha Neul Park, Sung Wook Won
In this study, a mixture of polyethylenimine (PEI) and polyvinyl chloride (PVC) was reacted at 80 °C for 6 h to synthesize crosslinked PEI/PVC polymer solution, which was injected to produce the PEI/PVC-crosslinked fiber (PEI/PVC-CF). PEI/PVC-CF was investigated as an adsorbent to remove and recover Pd(II) from acidic solutions. In order to examine the adsorption characteristics and usability of PEI/PVC-CF for Pd(II) recycling, several experiments such as isotherm, kinetics, desorption and reuse were conducted...
September 4, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28880069/flexible-poly-vinyl-chloride-nanocomposites-reinforced-with-hyperbranched-polyglycerol-functionalized-graphene-oxide-for-enhanced-gas-barrier-performance
#18
Kyu Won Lee, Jae Woo Chung, Seung-Yeop Kwak
Herein, we describe the preparation of flexible poly(vinyl chloride) (PVC) containing hyperbranched polyglycerol (HPG)-functionalized graphene oxide (HGO) as a reinforcing filler and reveal that the obtained composites exhibit greatly improved gas barrier properties. Moreover, we show that HGO, synthesized by surface-initiated ring-opening polymerization of glycidol followed by esterification with butyric anhydride, exists as individual exfoliated nanosheets possessing abundant functional groups capable of interacting with PVC...
September 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28872359/ambulatory-blood-pressure-results-and-heart-rate-variability-in-patients-with-premature-ventricular-contractions
#19
Lutfu Askin, Mustafa Cetin, Serdar Turkmen
BACKGROUND: The presence of premature ventricular contractions (PVCs) is a sign of arrhythmia and typically trigerred by over stimulation of the sympathetic nervous system. This study examined the relationships among PVCs, heart rate variability (HRV), and 24-hour ambulatory blood pressure (ABP) results. METHODS: This observational clinical study evaluated a cohort of 100 consecutive patients (58 women and 42 men) with PVCs. The individuals were split into occasional (n = 50) and frequent (n = 50) PVCs groups...
September 5, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28866882/organophosphorus-flame-retardants-and-plasticizers-in-building-and-decoration-materials-and-their-potential-burdens-in-newly-decorated-houses-in-china
#20
Yan Wang, Minmin Hou, Qiaonan Zhang, Xiaowei Wu, Hongxia Zhao, Qing Xie, Jingwen Chen
Organophosphorus flame retardants (OPFRs) have been increasingly used in various building and decoration materials to fulfill fire safety standards since the phasing out of polybrominated diphenyl ethers. We determined OPFR concentrations in the most commonly used building and decoration materials available in local markets and online in China. The OPFR concentrations varied significantly, from 14.78 ng/g (putty powder) to 9649000 ng/g (expanded polystyrene panel (EPS)). Relatively high concentrations of OPFRs were found in foam samples, followed by nonwoven and polyvinyl chloride (PVC) wallpaper, PVC pipes, sealing materials, boards, and paints...
September 15, 2017: Environmental Science & Technology
keyword
keyword
48808
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"