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https://www.readbyqxmd.com/read/29793170/effective-size-selection-of-mos-2-nanosheets-by-a-novel-liquid-cascade-centrifugation-influences-of-the-flakes-dimensions-on-electrochemical-and-photoelectrochemical-applications
#1
Marzieh Kajbafvala, Mansoor Farbod
Although liquid phase exfoliation is a powerful method to produce MoS2 nanosheets in large scale, but its effectiveness is limited by the diversity of produced nanosheets sizes. Here a novel approach for separation of MoS2 flakes having various lateral sizes and thicknesses based on the cascaded centrifugation has been introduced. This method involves a pre-separation step which is performed through low-speed centrifugation to avoid the deposition of large area single and few-layers by the heavier particles...
May 14, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793133/an-ultrasensitive-and-selective-electrochemical-aptasensor-based-on-rgo-mwcnts-chitosan-carbon-quantum-dot-for-the-detection-of-lysozyme
#2
Behzad Rezaei, Hamid Reza Jamei, Ali Asghar Ensafi
An aptamer-based method is described for the electrochemical determination of lysozyme. A glassy carbon electrode was modified with a nanocomposite composed of reduced graphene oxide (rGO), multi-walled carbon nanotubes (MWCNTs), chitosan (CS), and a synthesized carbon quantum dot (CQD) from CS. The composition of the nanocomposite (rGO-MWCNT/CS/CQD) warrants a high surface-to-volume ratio, high conductivity, high stability, and great electrocatalytic activity. This nanocomposite provides a suitable site for better immobilization of aptamers due to the existence of many amino and carboxyl functional groups, and remaining oxygen-related defects properties in rGO...
May 9, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29791128/donor-acceptor-supramolecular-organic-nanofibers-as-visible-light-photoelectrocatalysts-for-hydrogen-production
#3
Liping Yang, Maomao Wang, Paul M Slattum, Benjamin R Bunes, Yuanhao Wang, Chuanyi Wang, Ling Zang
Perylene tetracarboxylic diimide (PTCDI) derivatives have been extensively studied for one-dimensional self-assembled systems and for applications in photocatalysis. Herein, we constructed a PTCDI-based donor-acceptor (D-A) supramolecular system via in situ self-assembly on an indium tin oxide (ITO) conductive glass surface. The self-assembled PTCDI nanostructures exhibit well-defined nanofibril morphologies and strong photocurrents. Interestingly, a strong and reversible electrochromic color change was observed during cyclic voltammetry (CV)...
May 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29790503/a-voltammetric-method-for-fe-iii-in-blood-serum-using-a-screen-printed-electrode-modified-with-a-schiff-base-ionophore
#4
Susheel K Mittal, Sonia Rana, Navneet Kaur, Craig E Banks
Herein, a potent electrochemical ionophore (SMS-2) based on a Schiff base has been used for the modification of a screen-printed electrode (SPE). The modified disposable electrode can selectively detect ferric ions in an aqueous medium. Redox behavior of the proposed strip was characterized using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Incorporation of the ligand in the ink of the SPE enhanced the analytical performance of the electrode, and its surface modification was confirmed by SEM and EDX analysis...
May 23, 2018: Analyst
https://www.readbyqxmd.com/read/29790062/analysis-of-pulse-signals-based-on-array-pulse-volume
#5
Ji Cui, Li-Ping Tu, Jian-Feng Zhang, Shao-Liang Zhang, Zhi-Feng Zhang, Jia-Tuo Xu
OBJECTIVE: To collect and analyze multi-dimensional pulse diagram features with the array sensor of a pressure profile system (PPS) and study the characteristic parameters of the new multi-dimensional pulse diagram by pulse diagram analysis technology. METHODS: The pulse signals at the Guan position of left wrist were acquired from 105 volunteers at the Shanghai University of Traditional Chinese Medicine. We obtained the pulse data using an array sensor with 3×4 channels...
May 22, 2018: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29789493/critical-appraisal-of-advanced-glycation-end-products-ages-and-circulating-soluble-receptors-for-advanced-glycation-end-products-srage-as-a-predictive-biomarkers-for-cardiovascular-disease-in-hemodialysis-patients
#6
Adel M A Assiri, Hala F M Kamel, Abeer A ALrefai
The interaction of advanced glycation end products (AGE) and their receptors promote vascular complications of diabetes in hemodialysis (HD) patients. The soluble form of the receptor for the advanced glycation end-products (sRAGE) has been studied as a vascular biomarker in various diseases with controversial results. Our aim was to evaluate the association of the serum levels of the AGEs and their receptor sRAGE with cardiovascular disease (CVD) and the cardiovascular risk factors among HD patients. There were 130 HD patients and 80 age and gender matched control subjects were involved; 31...
May 22, 2018: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29789483/removal-of-crystal-violet-by-using-reduced-graphene-oxide-supported-bimetallic-fe-ni-nanoparticles-rgo-fe-ni-application-of-artificial-intelligence-modeling-for-the-optimization-process
#7
Wenqian Ruan, Jiwei Hu, Jimei Qi, Yu Hou, Rensheng Cao, Xionghui Wei
Reduced-graphene-oxide-supported bimetallic Fe/Ni nanoparticles were synthesized in this study for the removal of crystal violet (CV) dye from aqueous solutions. This material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS), Raman spectroscopy, N₂-sorption, and X-ray photoelectron spectroscopy (XPS). The influence of independent parameters (namely, initial dye concentration, initial pH, contact time, and temperature) on the removal efficiency were investigated via Box⁻Behnken design (BBD)...
May 22, 2018: Materials
https://www.readbyqxmd.com/read/29788839/phenobarbital-pharmacokinetics-in-neonates-and-infants-during-extracorporeal-membrane-oxygenation
#8
Pavla Pokorná, Martin Šíma, Václav Vobruba, Dick Tibboel, Ondřej Slanař
INTRODUCTION: The disposition of drugs is potentially changed due to extracorporeal membrane oxygenation (ECMO) in neonates and infants. METHODS: The aim of the study was to evaluate the individual pharmacokinetics (PK) of phenobarbital and the effect of PK covariates in neonates and infants undergoing ECMO. Sixteen patients (7 neonates, 9 infants) treated with phenobarbital during ECMO (centrifugal-flow pump circuits) were enrolled in the PK study. Phenobarbital serum concentrations were measured using a fluorescence polarization immunoassay...
May 2018: Perfusion
https://www.readbyqxmd.com/read/29788838/in-vitro-and-in-vivo-assessment-of-oxygenator-blood-volume-for-the-prediction-of-clot-formation-in-an-ecmo-circuit-theory-and-validation
#9
Nikolai Krivitski, Gregory Galyanov, Deborah Cooper, Mariam M Said, Oswaldo Rivera, Gerald T Mikesell, Khodayar Rais-Bahrami
INTRODUCTION: Clotting is one of the major causes of mortality and morbidity during extracorporeal membrane oxygenation (ECMO). A large meta-analysis study suggests that 29% of patients require the oxygenator to be replaced during ECMO. As clots usually form in the oxygenator, the oxygenator blood volume (OXBV) decreases over time. The currently used pressure gradient as a predicator of clot formation is unreliable. OBJECTIVE: The aim of this study was to develop and validate ultrasound dilution technology in a quantitative assessment of clotting, using measurements of OXBV...
May 2018: Perfusion
https://www.readbyqxmd.com/read/29788448/inhibition-of-endothelial-progenitor-cells-may-explain-the-high-cardiovascular-event-rate-in-patients-with-rheumatoid-arthritis
#10
Mohamad Adawi, Nina Pastuck, Golan Saaida, Rizak Sirchan, Abdalla Watad, Arnon Blum
Background: Rheumatoid arthritis (RA) patients may suffer cardiovascular (CV) events much more than the general population, and CV disease is the leading cause of death in patients with RA. Our hypothesis was that impaired function of endothelial progenitor cells may contribute to endothelial dysfunction and the clinical CV events of patients with RA. Methods: 27 RA patients (9 males and 18 females) with an active disease and 13 healthy subjects who served as the control group (9 males and 4 females) were enrolled to this prospective study...
May 16, 2018: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29788140/immune-unreactive-urinary-albumin-as-a-predictor-of-cardiovascular-events-the-hortega-study
#11
Fernando Martínez, Gernot Pichler, Adrian Ruiz, Juan C Martín-Escudero, Felipe J Chaves, Veronica Gonzalez-Albert, Maria Tellez-Plaza, Hiddo J L Heerspink, Dick D E Zeeuw, Josep Redon
Background: We aimed to determine if immune-unreactive albumin excretion (IURAE) is associated with cardiovascular (CV) events in a representative sample of a general population from Spain. Methods: We included 1297 subjects (mean age ± standard error 48.0 ± 0.2 years, 48% females), who participated in the Hortega Follow-Up Study. The primary endpoint was incidence of fatal and non-fatal CV events. Urinary albumin excretion (UAE) was measured in spot voided urine, frozen at -80°C, by immunonephelometry [immune-reactive albumin excretion (IRAE)] and by high-performance liquid chromatography (HPLC) [total albumin excretion (AE)]...
May 16, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29788095/effects-of-maturity-at-harvest-on-the-nutritive-value-and-ruminal-digestion-of-eragrostis-tef-cv-moxie-when-fed-to-beef-cattle
#12
J R Vinyard, J B Hall, J E Sprinkle, G E Chibisa
Teff (Eragrostis tef cv. Moxie), a warm-season annual grass, could be an excellent forage for beef cattle. However, there is limited information on its nutritive value to cattle when harvested at different stages of maturity. Thus, the objective of this research was to determine the effect of feeding teff hay harvested at the boot (BT), early-heading (EH), or late-heading (LH) stages of maturity on nutrient intake, ruminal fermentation characteristics, omasal nutrient flow, and N utilization in beef cattle...
May 18, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29787935/functional-characterization-of-the-eugenol-synthase-gene-rcegs1-in-rose
#13
Huijun Yan, Sylvie Baudino, Jean-Claude Caissard, Florence Nicolè, Hao Zhang, Kaixue Tang, Shubin Li, Shugang Lu
The floral volatile compound eugenol is an important constituent in many aromatic plants, being a floral attractant for pollinators as well as having antimicrobial activity. Rose flowers emit eugenol and its derivatives. We recently reported a eugenol synthase gene (RcEGS1) (JQ522949) that was present in petals of R. chinensis cv. Old Blush. RcEGS1 has its highest expression levels in the petals compared to other tissues; it has higher transcript levels at the developmental blooming stage and lower levels at budding and senescence stages...
May 10, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29787288/a-multicenter-rct-of-zephyr%C3%A2-endobronchial-valve-treatment-in-heterogeneous-emphysema-liberate
#14
Gerard J Criner, Richard Sue, Shawn Wright, Mark Dransfield, Hiram Rivas-Perez, Tanya Wiese, Frank C Sciurba, Pallav L Shah, Momen M Wahidi, Hugo Goulart de Oliveira, Brian Morrissey, Paulo F G Cardoso, Steven Hays, Adnan Majid, Nicholas Pastis, Lisa Kopas, Mark Vollenweider, P Michael McFadden, Michael Machuzak, David W Hsia, Arthur Sung, Nabil Jarad, Malgorzata Kornaszewska, Stephen Hazelrigg, Ganesh Krishna, Brian Armstrong, Narinder S Shargill, Dirk-Jan Slebos
RATIONALE: This is the first multicenter RCT to evaluate effectiveness and safety of Zephyr® Endobronchial Valve EBV® out to 12-months. OBJECTIVES: To evaluate the effectiveness and safety of Zephyr EBV in heterogeneous emphysema with little to no collateral ventilation (CV) in the treated lobe. METHODS: Subjects were enrolled with a 2:1 randomization (EBV: Standard-of-Care (SoC)) at 24 sites. Primary outcome at 12-months was the ΔEBV-SoC of subjects with a post-bronchodilator FEV1 improvement from baseline of ≥15%...
May 22, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29786817/targeted-cardiopulmonary-resuscitation-training-focused-on-the-family-members-of-high-risk-patients-at-a-regional-medical-center-a-comparison-between-family-members-of-high-risk-and-no-risk-patients
#15
Kap Su Han, Ji Sung Lee, Su Jin Kim, Sung Woo Lee
BACKGROUND: We developed a hospital-based cardiopulmonary resuscitation (CPR) training model focused on the target population (family members of patients with potential risks for cardiac arrest) and compared the outcome of CPR training between target and non-target populations for validity. METHODS: Family members of patients in training were divided into three groups on the basis of patients' diseases, as follows: 1) the cardio-specific (CS) risk group, including family members of patients with cardiac disease at risk of cardiac arrest; 2) the cardiovascular (CV) risk group, including family members of patients with risk factors for cardiovascular disease; and 3) the no-risk group...
May 2018: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29786617/fabrication-of-hollow-boron-doped-diamond-nanostructure-via-electrochemical-corrosion-of-a-tungsten-oxide-template
#16
Young-Kyun Lim, Choong-Hyun Lee, Eung-Seok Lee, Dae-Soon Lim
In the study, a hollow boron-doped diamond (BDD) nanostructure electrode is fabricated to increase the reactive surface area for electrochemical applications. Tungsten oxide nanorods are deposited on the silicon substrate as a template by the hot filament chemical vapor deposition (HFCVD) method. The template is coated with a 100 nm BDD layer deposited by HFCVD to form a core-shell nanostructure. The WOx core is finally electrochemically dissolved to form hollow BDD nanostructure. The fabricated hollow BDD nanostructure electrode is investigated via scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy...
May 22, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29785557/highly-sensitive-ethanol-chemical-sensor-based-on-novel-ag-doped-mesoporous-%C3%AE-fe-2-o-3-prepared-by-modified-sol-gel-process
#17
Moteb M Alqahtani, Atif M Ali, Farid A Harraz, M Faisal, Adel A Ismail, Mahmoud A Sayed, M S Al-Assiri
Mesoporous α-Fe2 O3 has been synthesized via a simple sol-gel procedure in the presence of Pluronic (F-127) triblock copolymer as structure directing agent. Silver (Ag) nanoparticles were deposited onto α-Fe2 O3 matrix by the photochemical reduction approach. Morphological analysis revealed the formation of Ag nanoparticles with small sizes < 20 nm onto the mesoporous structure of α-Fe2 O3 possessing < 50 nm semi-spherical shape. The XRD, FTIR, Raman, UV-vis, PL, and N2 sorption isotherm studies confirmed the high crystallinity, mesoporosity, and optical characteristics of the synthesized product...
May 21, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29784470/immunogenicity-and-safety-of-menacwy-tt-a-meningococcal-conjugate-vaccine-co-administered-with-routine-childhood-vaccine-in-healthy-infants-a-phase-iii-randomized-study
#18
Ghassan Dbaibo, Juan Carlos Tinoco Favila, Magali Traskine, Archana Jastorff, Marie Van der Wielen
BACKGROUND: Invasive meningococcal disease has a high burden in young children, particularly during infancy. We investigated the immunogenicity and safety of a quadrivalent meningococcal conjugated vaccine (MenACWY-TT) co-administered with routine vaccines in healthy infants. METHODS: In this phase IIIb study (NCT01340898) conducted in 2 centers in Lebanon and Mexico, 750 infants were randomized (2:1:1) to receive MenACWY-TT according to 3 schedules: 3+1 (at ages 2, 4, 6 and 15-18 months; group ACWY3+1); 1+1 (at 6 and 15-18 months; group ACWY1+1) or single-dose at 15-18 months (group ACWY1)...
May 18, 2018: Vaccine
https://www.readbyqxmd.com/read/29784378/nano-carbon-black-based-screen-printed-sensor-for-carbofuran-isoprocarb-carbaryl-and-fenobucarb-detection-application-to-grain-samples
#19
Flavio Della Pelle, Claudia Angelini, Manuel Sergi, Michele Del Carlo, Alessia Pepe, Dario Compagnone
An electrochemical screening assay for the detection of phenyl carbamates (i.e. carbaryl, carbofuran, isoprocarb and fenobucarb) was developed and applied to grains samples (i.e. durum wheat, soft wheat and maize). Nano carbon black (CB) was strategically employed to realize an effective, reproducible, fouling resistant, low cost, delocalisable screen printed sensor (CB-SPE). CB-SPEs morphology (SEM and FEM) and electrochemical property (CV and EIS) were studied. The final pesticides analysis protocol consist of: (i) extraction of the analyte (just by mixing), (ii) alkaline hydrolysis (10 min R...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29784361/calcium-selective-electrodes-based-on-photo-cured-polyurethane-acrylate-membranes-covalently-attached-to-methacrylate-functionalized-poly-3-4-ethylenedioxythiophene-as-solid-contact
#20
Cristina Ocaña, Natalia Abramova, Andrey Bratov, Tom Lindfors, Johan Bobacka
We report here the fabrication of solid-contact calcium-selective electrodes (Ca2+ -SCISEs) made of a polyurethane acrylate ion-selective membrane (ISM) that was covalently attached to the underlying ion-to-electron transducer (solid-contact). Methacrylate-functionalized poly(3,4-ethylenedioxythiophene) (Meth-PEDOT) and Meth-PEDOT films containing either multiwalled carbon nanotubes (MWCNT) or carboxylated MWCNT (cMWCNT) were used as solid contacts. The solid contacts were deposited by drop-casting on screen-printed electrodes and characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and potentiometry...
August 15, 2018: Talanta
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