Read by QxMD icon Read


Shijie Li, Shiwei Hu, Wei Jiang, Yanping Liu, Yingtang Zhou, Yu Liu, Liuye Mo
A huge challenge in the field of pollutant removal is the scarcity of visible-light-driven (VLD) photocatalysts that are efficient, stable, easily recyclable and capable of mineralizing organic pollutants. In this regard, a novel hierarchical architecture of Bi2 MoO6 nanosheets onto NiTiO3 nanofibers for tetracycline hydrochloride (TC) removal was rationally designed and fabricated via a facile approach. In this heterojunction system, highly homogeneous-distributed Bi2 MoO6 nanosheets were anchored on electrospun NiTiO3 nanofibers, endowing the heterojunction with compact interfacial contact...
March 13, 2018: Journal of Colloid and Interface Science
Nermin Hrnčić
Aim To identify risk factors for hearing impairment presented in neonates born in Cantonal Hospital Zenica (CHZ) and to estimate their influence on outcome of hearing tests in Newborn Hearing Screening (NHS). Methods Retrospective-prospective study was done at the Department of Gynaecology and Maternity. The NHS was performed with transitory evoked otoacoustic emissions (TEOAE) during a six-month period using "Titan" device (Interacoustics, Denmark). The questionnaire was written for the purpose of getting more structured basic information about every newborn and to identify risk factors for hearing impairment...
February 1, 2018: Medicinski Glasnik
A Garbout, M Férid
Considering the features in changing the structure and properties of rare earth titanates pyrochlores, the substituted Dy2 Ti2 O7 may be very attractive for various applications. Effect of Sm and Y substitution on the structural properties of Dy2 Ti2 O7 ceramic was established. These ceramics were prepared by solid-state reaction and characterized by X-ray diffraction and Raman spectroscopy. Both analysis show that YDyTi2 O7 with the pyrochlore structure is obtained after heating at 1400°C, but SmDyTi2 O7 has already formed after sintering at 1200°C...
March 10, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Francesca Malvano, Luigi Maritato, Giovanni Carapella, Pasquale Orgiani, Roberto Pilloton, Marisa Di Matteo, Donatella Albanese
Due to their interesting ferroelectric, conductive and dielectric properties, in recent years, perovskite-structured materials have begun to attract increasing interest in the biosensing field. In this study, a strontium titanate perovskite layer (SrTiO₃) has been synthesized on a platinum electrode and exploited for the development of an impedimetric label-free immunosensor for Escherichia coli O157:H7 detection. The electrochemical characterization of the perovskite-modified electrode during the construction of the immunosensor, as well as after the interaction with different E...
March 16, 2018: Biosensors
Chen Zou, Xiaojuan Zhao, Yan Xu
We report a novel, one-dimensional zirconium-doped layered trititanate with a porous core and a textured surface of ultrafine nanofibers (∼5 nm) by the hydrothermal alkaline treatment of electrospun fibers. It demonstrates superior efficiency for rapid, capacitive and simultaneous removal of multiple heavy metal ions such as Pb2+, Cd2+, Cu2+ and Zn2+. The adsorption is exceptionally rapid, showing 100% removal of Cu2+ in 10 min, and 100% removal of Pb2+ and Cd2+ in 20 min in water with a wide range of concentrations from 0...
March 16, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Ming Xiao, Daozhi Shen, Kevin P Musselman, Walter W Duley, Y Norman Zhou
Neuromorphic computational systems that emulate biological synapses in the human brain are fundamental in the development of artificial intelligence protocols beyond the standard von Neumann architecture. Such systems require new types of building blocks, such as memristors that access a quasi-continuous and wide range of conductive states, which is still an obstacle for the realization of high-efficiency and large-capacity learning in neuromorphoric simulation. Here, we introduce hydrogen and sodium titanate nanobelts, the intermediate products of hydrothermal synthesis of TiO2 nanobelts, to emulate the synaptic behavior...
March 16, 2018: Nanoscale
Wenhan Xu, Gang Yang, Lan Jin, Jie Liu, Yunhe Zhang, Zhicheng Zhang, Zhenhua Jiang
Two sets of thermal stable nanocomposites were fabricated by using engineering plastics poly (ether sulfone) (PES) as a matrix and phthalocyanine molecules (CuPc) or hyperbranched phthalocyanine (HCuPc) coated barium titanate nanoparticles (BT) as filler for high electric field and high temperature dielectric applications. By side-by-side comparison, the hyperbranched coating is finely addressed for enhancing the dielectric response and breakdown strength of the composites. Specifically, BT-HCuPc/PES exhibits 40% lower dielectric loss and about 110% larger breakdown strength than BT-CuPc/PES...
March 15, 2018: ACS Applied Materials & Interfaces
Hoa Thanh Phan, Thien Xuan Dinh, Phong Nhu Bui, Van Thanh Dau
In this paper, we report on the design, simulation, and experimental analysis of a miniaturized device that can generate multiple circulated jet flows. The device is actuated by a lead zirconate titanate (PZT) diaphragm. The flows in the device were studied using three-dimensional transient numerical simulation with the programmable open source OpenFOAM and was comparable to the experimental result. Each flow is verified by two hotwires mounted at two positions inside each consisting chamber. The experiment confirmed that the flow was successfully created, and it demonstrated good agreement with the simulation...
March 13, 2018: Sensors
Bing Li, Junsheng Zheng, Hongyou Zhang, Liming Jin, Daijun Yang, Hong Lv, Chao Shen, Annadanesh Shellikeri, Yiran Zheng, Ruiqi Gong, Jim P Zheng, Cunman Zhang
Among the various energy-storage systems, lithium-ion capacitors (LICs) are receiving intensive attention due to their high energy density, high power density, long lifetime, and good stability. As a hybrid of lithium-ion batteries and supercapacitors, LICs are composed of a battery-type electrode and a capacitor-type electrode and can potentially combine the advantages of the high energy density of batteries and the large power density of capacitors. Here, the working principle of LICs is discussed, and the recent advances in LIC electrode materials, particularly activated carbon and lithium titanate, as well as in electrolyte development are reviewed...
March 12, 2018: Advanced Materials
Ray W Squires, Adam M Shultz, Joerg Herrmann
PURPOSE OF REVIEW: Cancer patients nearly universally experience a decline in quality of life, with fatigue and reduced exercise tolerance as cardinal reflections. A routine exercise program can improve these signs and symptoms as well as overall outcomes. The review provides an updated overview of the field and its translation to clinical practice. RECENT FINDINGS: A wealth of clinical studies have documented the safety and benefits of exercise after and during cancer therapy, and pilot and larger-scale studies are currently ongoing to integrate exercise into the treatment program for cancer patients undergoing active therapy (EXACT pilot, OptiTrain, and TITAN study)...
March 10, 2018: Current Oncology Reports
Faysal A Yafi, Robert Andrianne, Laith Alzweri, Jeffrey Brady, Michael Butcher, Daniel Chevalier, Kenneth J DeLay, Antoine Faix, Georgios Hatzichristodoulou, Wayne J G Hellstrom, Lawrence Jenkins, Tobias S Kohler, Daniar Osmanov, Sun Hung Park, M David Schwabb, Robert Valenzuela, Koenraad van Renterghem, Steven K Wilson
BACKGROUND: After radical prostatectomy (RP), erectile dysfunction, often necessitating the need for inflatable penile prosthesis (IPP) insertion, and urinary incontinence and climacturia can ensue. AIM: To assess the efficacy and safety of the mini-jupette, a mesh used to approximate the medial aspects of the 2 corporotomies at the time of IPP insertion, for the management of climacturia and urine leakage in patients with minimal incontinence. METHODS: We conducted a pilot multicenter study of patients with post-RP erectile dysfunction and climacturia and/or mild urinary incontinence (≤2 pads/day [ppd]) undergoing IPP insertion with concomitant placement of a mini-jupette graft...
March 6, 2018: Journal of Sexual Medicine
F Nestola, N Korolev, M Kopylova, N Rotiroti, D G Pearson, M G Pamato, M Alvaro, L Peruzzo, J J Gurney, A E Moore, J Davidson
Laboratory experiments and seismology data have created a clear theoretical picture of the most abundant minerals that comprise the deeper parts of the Earth's mantle. Discoveries of some of these minerals in 'super-deep' diamonds-formed between two hundred and about one thousand kilometres into the lower mantle-have confirmed part of this picture. A notable exception is the high-pressure perovskite-structured polymorph of calcium silicate (CaSiO3 ). This mineral-expected to be the fourth most abundant in the Earth-has not previously been found in nature...
March 7, 2018: Nature
Shruti B Seshadri, Michelle M Nolan, Goknur Tutuncu, Jennifer S Forrester, Eva Sapper, Giovanni Esteves, Torsten Granzow, Pam A Thomas, Juan C Nino, Tadej Rojac, Jacob L Jones
Large piezoelectric coefficients in polycrystalline lead zirconate titanate (PZT) are traditionally achieved through compositional design using a combination of chemical substitution with a donor dopant and adjustment of the zirconium to titanium compositional ratio to meet the morphotropic phase boundary (MPB). In this work, a different route to large piezoelectricity is demonstrated. Results reveal unexpectedly high piezoelectric coefficients at elevated temperatures and compositions far from the MPB. At temperatures near the Curie point, doping with 2 at% Sm results in exceptionally large piezoelectric coefficients of up to 915 pm/V...
March 7, 2018: Scientific Reports
Jobin Varghese, Tuomo Siponkoski, Maciej Sobocinski, Timo Vahera, Heli Jantunen
This paper reports the first ultralow sintering temperature (450 oC) co-fired multifunctional ceramic substrate based on a commercial lead zirconium titanate (PZ29)-glass composite and fabricated by tape casting, isostatic lamination, and sintering. This substrate was prepared from a novel tape casting slurry composition suitable for co-firing at this low temperature with commercial Ag electrodes at 450 oC. The green cast tape and sintered substrate showed a surface roughness of 146 nm and 355 nm, respectively, suitable for device level fabrication by post-processing...
March 7, 2018: ACS Applied Materials & Interfaces
Wooje Han, Taehee Kim, Byungwook Yoo, Hyung-Ho Park
Fluoropolymer nanocomposites of poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) were prepared using fluorinated barium strontium titanate (Ba1-x Srx TiO3 , BSTO) nanoparticles (NPs) by low-temperature synthesis using a modified liquid-solid solution process. The exact stoichiometry of as-synthesized BSTO NPs was confirmed by X-ray diffraction analysis along with lattice parameter calculations. The synthesized BSTO NPs were fluorinated using 2,2,2-trifluoroacetic acid as a fluorous ligand. The BSTO NPs showed high solubility in the fluorous system (polymer and solvent) on account of their modified surface...
March 6, 2018: Scientific Reports
Jonathan M Puder, Jeffrey S Pulskamp, Ryan Q Rudy, Ronald G Polcawich, Sunil A Bhave
This paper reports on a general analytical expression for the motional resistance ( ) of an arbitrary mode in a piezoelectric microelectromechanical system resonator with parallel plate electrode geometry. After applying simplifying assumptions and using analytical modes shapes, expressions for the of modes with out-of-plane flexure as the primary displacement are presented. These modes include free-free transverse beam flexure (TBF), unclamped disk flexure resonators (DFRs), and antisymmetric Lamb modes. For verification, is extracted from resonators fabricated in a lead zirconate titanate on silicon process...
March 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Huamin Zhao, Cunfu He, Lyu Yan, Haijun Zhang
It is necessary to develop a transducer that can quickly detect the inner and outer wall defects of thick-walled pipes, in order to ensure the safety of such pipes. In this paper, a flexible broadband Rayleigh-waves comb transducer based on PZT (lead zirconate titanate) for defect detection of thick-walled pipes is studied. The multiple resonant coupling theory is used to expand the transducer broadband and the FEA (Finite Element Analysis) method is used to optimize transducer array element parameters. Optimization results show that the best array element parameters of the transducer are when the transducer array element length is 30 mm, the thickness is 1...
March 2, 2018: Sensors
Francesca Venturini, Michael Baumgartner, Sergey M Borisov
Phosphors based on magnesium titanate activated with Mn 4 + ions are of great interest because, when excited with blue light, they display a strong red-emitting luminescence. They are characterized by a luminescence decay which is strongly temperature dependent in the range from -50 ∘ C to 150 ∘ C, making these materials very promising for temperature sensing in the biochemical field. In this work, the optical and thermal properties of the luminescence of Mg 2 TiO 4 are investigated for different Mn 4 + doping concentrations...
February 24, 2018: Sensors
C Rodenbücher, P Meuffels, G Bihlmayer, W Speier, H Du, A Schwedt, U Breuer, C-L Jia, J Mayer, R Waser, K Szot
Perovskites such as SrTiO3 , BaTiO3 , and CaTiO3 have become key materials for future energy-efficient memristive data storage and logic applications due to their ability to switch their resistance reversibly upon application of an external voltage. This resistance switching effect is based on the evolution of nanoscale conducting filaments with different stoichiometry and structure than the original oxide. In order to design and optimize memristive devices, a fundamental understanding of the interaction between electrochemical stress, stoichiometry changes and phase transformations is needed...
February 28, 2018: Scientific Reports
E Leistenschneider, M P Reiter, S Ayet San Andrés, B Kootte, J D Holt, P Navrátil, C Babcock, C Barbieri, B R Barquest, J Bergmann, J Bollig, T Brunner, E Dunling, A Finlay, H Geissel, L Graham, F Greiner, H Hergert, C Hornung, C Jesch, R Klawitter, Y Lan, D Lascar, K G Leach, W Lippert, J E McKay, S F Paul, A Schwenk, D Short, J Simonis, V Somà, R Steinbrügge, S R Stroberg, R Thompson, M E Wieser, C Will, M Yavor, C Andreoiu, T Dickel, I Dillmann, G Gwinner, W R Plaß, C Scheidenberger, A A Kwiatkowski, J Dilling
A precision mass investigation of the neutron-rich titanium isotopes ^{51-55}Ti was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the N=32 shell closure, and the overall uncertainties of the ^{52-55}Ti mass values were significantly reduced. Our results conclusively establish the existence of the weak shell effect at N=32, narrowing down the abrupt onset of this shell closure. Our data were compared with state-of-the-art ab initio shell model calculations which, despite very successfully describing where the N=32 shell gap is strong, overpredict its strength and extent in titanium and heavier isotones...
February 9, 2018: Physical Review Letters
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"