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https://www.readbyqxmd.com/read/28443940/facile-processes-for-producing-robust-transparent-conductive-platinum-nanofiber-mats
#1
Seongpil An, Yong Il Kim, Sumit Sinha-Ray, Min-Woo Kim, Hong Seok Jo, Mark T Swihart, Alexander L Yarin, Sam S Yoon
Mechanically robust freestanding platinum (Pt) nanofiber (NF) meshes are of great interest in applications where the corrosion resistance, malleability, and stability of a pure platinum structure must be combined with high surface area for catalysis. For photoelectrochemical applications, transparent electrodes are desirable. Several 1-dimensional (1D) Pt-based materials have been developed, but energy-intensive fabrication techniques and unsatisfactory performance have limited their practical implementation in next-generation photoelectrochemical applications...
April 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28443904/na3v2-po4-3-nitrogen-sulfur-codoped-3d-porous-carbon-enabling-ultra-long-cycle-life-sodium-ion-batteries
#2
Yu Jiang, Haochuan Zhang, Hai Yang, Zhenyu Qi, Yan Yu
Na3V2(PO4)3 (NVP) is regarded as a promising cathode material for sodium ion batteries (NIBs) because of its 3D open structure suitable for Na insertion/extraction and high energy density. However, the NVP suffers from poor electrical conductivity, which restricts the rate performance and the long cycle performance of the NVP for NIBs. Here, the NVP particles embedded in the N,S co-doped 3D porous carbon matrix (denoted as NVP@3D-NSC) were prepared by a facile process. The NVP@3D-NSC can deliver high specific discharge capacities at high rates (54 mA h g(-1) at 80 C)...
April 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28443862/a-small-bandgap-semiconductor-p-type-mnv2o6-active-for-photocatalytic-hydrogen-and-oxygen-production
#3
Brandon Zoellner, Elijah Gordon, Paul A Maggard
Extensive research has been conducted with the goal to find a single bandgap material that can absorb visible light and efficiently drive the catalysis of water to both hydrogen and oxygen. The p-type MnV2O6 (C2/m, Z = 2, a = 9.289 Å, b = 3.535 Å, and c = 6.763 Å, β = 112.64°), synthesized via solid-state techniques, was investigated for its potential use in the visible-light photocatalysis of water. Mott-Schottky analysis was used to experimentally determine the energetic positions of the valence and conduction bands as +0...
April 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28443824/stable-charged-antiparallel-domain-walls-in-hyperferroelectrics
#4
Shi Liu, Ronald Cohen
Charge-neutral 180$^\circ$ domain walls that separate domains of antiparallel polarization directions are common structural topological defects in ferroelectrics. In normal ferroelectrics, charged 180$^\circ$ domain walls running perpendicular to the polarization directions are highly energetically unfavorable because of the depolarization field and are difficult to stabilize. We explore both neutral and charged 180$^\circ$ domain walls in hyperferroelectrics, a class of proper ferroelectrics with persistent polarization in the presence of a depolarization field, using density functional theory...
April 26, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28443608/dynamic-behaviour-of-interphases-and-its-implication-on-high-energy-density-cathode-materials-in-lithium-ion-batteries
#5
Wangda Li, Andrei Dolocan, Pilgun Oh, Hugo Celio, Suhyeon Park, Jaephil Cho, Arumugam Manthiram
Undesired electrode-electrolyte interactions prevent the use of many high-energy-density cathode materials in practical lithium-ion batteries. Efforts to address their limited service life have predominantly focused on the active electrode materials and electrolytes. Here an advanced three-dimensional chemical and imaging analysis on a model material, the nickel-rich layered lithium transition-metal oxide, reveals the dynamic behaviour of cathode interphases driven by conductive carbon additives (carbon black) in a common nonaqueous electrolyte...
April 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28442143/polypropylene-mesh-seeded-with-fibroblasts-a-new-approach-for-the-repair-of-abdominal-wall-defects-in-rats
#6
A Mohsina, Naveen Kumar, A K Sharma, Sameer Shrivastava, Dayamon D Mathew, V Remya, Sonal, S K Maiti, Kiranjeet Singh, K P Singh
PURPOSE: The purpose of study was to develop bioengineered scaffolds by seeding primary mouse embryo fibroblast cells (p-MEF) on polypropylene mesh and to test its efficacy for the repair of abdominal wall defects in rats. METHODS: The study was conducted on 18 clinically healthy adult Wistar rats of either sex. The animals were randomly divided into two equal groups having nine animals in each group. In both the groups a 20mm×20mm size full thickness muscle defect was created under xylazine and ketamine anesthesia in the mid-ventral abdominal wall...
April 17, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28441872/unraveling-the-nature-of-anomalously-fast-energy-storage-in-t-nb2o5
#7
Dongchang Chen, Jeng-Han Wang, Tsung-Fu Chou, Bote Zhao, Mostafa A El-Sayed, Meilin Liu
While T-Nb2O5 has been frequently reported to display an exceptionally fast rate of Li-ion storage (similar to a capacitor), the detailed mechanism of the energy storage process is yet to be unraveled. Here we report our findings in probing the nature of the ultrafast Li-ion storage in T-Nb2O5 using both experimental and computational approaches. Experimentally, we used in operando Raman spectroscopy performed on a well-designed model cell to systematically characterize the dynamic evolution of vibrational band groups of T-Nb2O5 upon insertion and extraction of Li ions during repeated cycling...
April 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28441792/urinary-iodine-concentrations-in-cancer-patients
#8
Saeed Kargar, Seyed Mostafa Shiryazdi, Seyed Reza Atashi, Hossein Neamatzadeh, Mahdieh Kamali
Background: It has been suggested that incidence of some cancers, especially examples in the breast and stomach may be influenced by the iodine intake. However, only few studies are available at present. Therefore, we have conducted the present assessment of iodine status in Iranian patients diagnosed with a malignancy. Materials and Methods: This cross-sectional study was conducted in 85 patients diagnosed with different types of cancer at Shahid Sadoughi Hospital, Yazd, Iran. The method used was based on the Sandell–Kolthoff reaction...
March 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28441365/efficacy-and-safety-of-3-nasal-packing-materials-used-after-functional-endoscopic-sinus-surgery-for-chronic-rhinosinusitis-a-comparative-study-in-china
#9
Xi-Ling Zheng, Yu-Xiang Zhao, Min Xu
BACKGROUND This study aimed to investigate the efficacy and safety of 3 nasal packing products (silicone tube, Beschitin-F, and Aquacel1-Ag) after functional endoscopic sinus surgery (FESS) for chronic rhinosinusitis (CRS) patients in China. MATERIAL AND METHODS Sixty-six CRS patients undergoing FESS surgery were randomly divided into 3 groups (22 patients in each group): the silicone tube group, the Beschitin-F group, and the Aquacel1-Ag group. Postoperative headache, nasal pain, nasal bleeding, and swelling of the nasal mucosa were observed at 1 month after FESS surgery...
April 25, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28441328/a-gradient-field-pulsed-eddy-current-probe-for-evaluation-of-hidden-material-degradation-in-conductive-structures-based-on-lift-off-invariance
#10
Yong Li, Haoqing Jing, Ilham Mukriz Zainal Abidin, Bei Yan
Coated conductive structures are widely adopted in such engineering fields as aerospace, nuclear energy, etc. The hostile and corrosive environment leaves in-service coated conductive structures vulnerable to Hidden Material Degradation (HMD) occurring under the protection coating. It is highly demanded that HMD can be non-intrusively assessed using non-destructive evaluation techniques. In light of the advantages of Gradient-field Pulsed Eddy Current technique (GPEC) over other non-destructive evaluation methods in corrosion evaluation, in this paper the GPEC probe for quantitative evaluation of HMD is intensively investigated...
April 25, 2017: Sensors
https://www.readbyqxmd.com/read/28441288/investigation-of-optically-stimulated-luminescence-and-signal-fading-properties-of-several-materials
#11
W Geoffrey West, Kimberlee J Kearfott, Chun Yong Seow
Optically stimulated luminescence (OSL) dosimetry involves the illumination of an irradiated sample on an appropriate material to produce a stimulated emission of light, whose intensity is indicative of the radiation dose. This technique is currently used for personnel dosimetry, environmental dosimetry, and geological dating applications. While a great deal of published research focusing on α-Al2O3:C and natural materials used for geological dating exist, relatively little is known about the OSL properties of thermoluminescent (TL) materials...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441229/preliminary-model-for-the-design-of-a-custom-middle-ear-prosthesis
#12
Brandon Kamrava, Jonathan A Gerstenhaber, Mamta Amin, Yah-El Har-El, Pamela C Roehm
HYPOTHESIS: Custom prostheses could be used to recreate the ossicular chain and improve hearing. BACKGROUND: Ossicular discontinuity or fixation occurs in 55% of cases of conductive hearing loss, with most cases involving the incus. Reconstruction has been achieved by a variety of methods; however, there has been little improvement in hearing outcomes in decades. METHODS: Precise measurements of anatomic dimensions, weight, and center of gravity were taken from 19 cadaveric incudes...
April 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28441142/magnetization-dynamics-in-magnonic-structures-with-different-geometries-interfaces-notches-and-waveguides
#13
M Mansurova, J von der Haar, J Panke, Jakob Walowski, Henning Ulrichs, M Münzenberg
The discovery of ultrafast magnetization dynamics 20 years ago has led to a broad variety of experimental techniques to explore phenomena in magnetic materials with high temporal resolution. In the current article we present a study dealing with broadband excitation of spin-wave packets at different magnonic crystal continuous magnetic film interfaces. Similar to protected conducting states on the surfaces of topological band insulators, these interfaces exhibit surface spin-wave modes that propagate out of the crystal into the continuous film...
April 25, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28441014/chemistry-inspired-adaptable-framework-structures
#14
Zhiguo Xia, Kenneth R Poeppelmeier
Adaptable crystalline frameworks are important in modern solid-state chemistry as they are able to accommodate a wide range of elements, oxidation states, and stoichiometries. Owing to this ability, such adaptable framework structures are emerging as the prototypes for technologically important advanced functional materials. In this Account, the idea of cosubstitution is explored as a useful "pairing" concept that can potentially lead to the creation of many new members of one particular framework structure...
April 25, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28440970/factors-associated-with-cigarette-smoking-in-central-parts-of-iran
#15
Mujtaba Shuja, Nizal Sarrafzadegan, Hamid Reza Roohafza, Masoumeh Sadeghi, Mahin Ghafari, Mahdi Mohammadian, Abdollah Mohammadian Hafshejani
Background: This study aims to assess factors associated with cigarette smoking in central parts of Iran. Materials and methods: We used the data of the post intervention phase of Isfahan Healthy Heart Program (IHHP) that was conducted in 2007. Logistic regression was used for calculating crude and adjusted Odds Ratios (OR). The group with the least prevalence of smoking was considered as the Reference Group (RG) and the OR for other parts of the variable was calculated based on the RG and reported with a confidence interval of 95%...
March 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28440872/lay-health-educators-and-print-materials-for-the-promotion-of-colorectal-cancer-screening-among-korean-americans-a-randomized-comparative-effectiveness-study
#16
Angela M Jo, Tung T Nguyen, Susan Stewart, Min J Sung, Ginny Gildengorin, Janice Y Tsoh, Elisa K Tong, Penny Lo, Charlene Cuaresma, Angela Sy, Hy Lam, Ching Wong, Matthew Jeong, Moon S Chen, Marjorie Kagawa-Singer
BACKGROUND: Colorectal cancer (CRC) is the second most commonly diagnosed cancer among Korean American men and women. Although CRC screening is effective in reducing the burden of this disease, studies have shown that Korean Americans have low screening rates. METHODS: The authors conducted a 2-arm cluster randomized controlled trial comparing a brochure (print) with a brochure and lay health educator (LHE) outreach (print + LHE) in increasing CRC screening rates among Korean American individuals...
April 25, 2017: Cancer
https://www.readbyqxmd.com/read/28440837/modelling-of-thermal-transport-through-a-nanocellular-polymer-foam-toward-the-generation-of-a-new-superinsulating-material
#17
Guilong Wang, Chongda Wang, Jinchuan Zhao, Guizhen Wang, Chul B Park, Guoqun Zhao
Superinsulating materials play a pivotal role in achieving the sustainable development of our modern world by improving energy efficiency, and reducing energy consumption and CO2 emission. Nanocellular polymer foams have been considered as a promising superinsulating material, but their development is yet to be achieved. The understanding of thermal transport through the nanocellular foam is crucial for developing this superinsulating material. Herein, we report an accurate mathematical model for the first time to quantitatively estimate thermal transport through the nanocellular polymer foam...
April 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28440633/syntheses-structures-and-characterization-of-quaternary-tellurites-li3mte4o11-m-al-ga-and-fe
#18
Minfeng Lü, Hongil Jo, Seung-Jin Oh, Suheon Lee, Kwang-Yong Choi, Yang Yu, Kang Min Ok
Three new quaternary lithium metal tellurites, Li3MTe4O11 (M = Al, Ga, and Fe), have been synthesized through hydrothermal and solid-state reactions by heating a mixture of LiOH·H2O, TeO2, and M2O3. The structures of the title compounds have been determined by single-crystal and powder X-ray diffraction. Li3MTe4O11 reveal three-dimensional (3D) frameworks that consist of MO6 octahedra, TeO3 trigonal pyramids, and TeO4 polyhedra. The variable coordination mode of Te(4+) within the framework leads to the formation of 1D channels that host Li(+) cations on both tetrahedral and octahedral sites...
April 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28440613/constructing-a-heterostructural-lini0-4mn1-6o4-%C3%AE-material-from-concentration-gradient-framework-to-significantly-improve-its-cycling-performance
#19
Fang Lian, Fan Zhang, Lin Yang, Leilei Ma, Yadi Li
A heterostructural LiNi0.35Mn1.65O4-δ-LiNi0.5Mn1.5O4 was achieved via constructing the concentration-gradient material with an average composition of LiNi0.4Mn1.6O4-δ. The as-obtained samples have been characterized by the cross sectional scanning electron microscopy (SEM) and energy dispersive x-ray spectrometry (EDS) that the core material LiNi0.35Mn1.65O4-δ is encapsulated completely by a concentration-gradient shell with the outmost layer of LiNi0.5Mn1.5O4. Demonstrated by high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) analysis with low-energy Ar neutral beam etching method, the structurally stable P4332 phase on the surface coordinates the high conductive Fd-3m phase in the bulk without any detectable interface...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28440608/association-of-human-cytomegalovirus-with-hodgkin%C3%A2-s-disease-and-non-hodgkin%C3%A2-s-lymphomas
#20
Hamide Mehravaran, Manoochehr Makvandi, Alireza Samarbaf Zade, Niloofar Neisi, Hadis Kiani, Hashem Radmehr, Toran Shahani, Seyedeh Zeinab Hoseini, Nastaran Ranjbari, Rahil Nahid Samiei
Background and Objective: The human cytomegalovirus (HCMV) can persist lifelong as a latent infection and may result in a series of disorders. Associations with both Hodgkin’s disease and non-Hodgkin´s lymphomas have been reported. Expression of the unique long (UL)138 gene of HCMV is linked with the viral latency phase while that of the immediate-early (IE)1 gene is typical of the viral replication phase in patients. This study conducted to determine the prevalence of CMV latent infection in histological tissue samples from patients with Hodgkin’s and Non-Hodgkin´s lymphomas...
March 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
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