Read by QxMD icon Read


Damoon Sohrabi Baba Heidary, Clive A Randall
Both Li2CO3-coated nickel particles and fast firing technique were utilized in the manufacturing of MLCCs. They preserved the conductivity of Ni electrodes and provided the possibility of sintering the devices in oxidizing atmospheres. By using our method, the partial pressure of oxygen increase from 10-10 atm in conventional methods to 10-4 atm. The oxidizing atmosphere reduced the oxygen vacancy concentration as illustrated by the color change of the samples, and the results of EELS (electron energy loss spectroscopy)...
October 21, 2016: ACS Applied Materials & Interfaces
Sonika Patel, Carl T Talmo, Sumon Nandi
BACKGROUND: Taper corrosion at the modular junctions of total hip arthroplasty (THA) femoral stems are known to cause locally destructive adverse local tissue reaction (ALTR). However, the implants at risk remain to be fully elucidated. CASE REVIEW: We report the case of a 76-year-old woman with hip pain, abductor weakness, and sciatic nerve symptoms 2 years following metal-on-polyethylene THA. Serum cobalt levels were elevated, while chromium levels were normal...
October 15, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
Jenaro Á Fernández-Valencia
No abstract text is available yet for this article.
October 15, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
Lin Zhang, Xiaobing Shan, Patrick Bass, Yang Tong, Terry D Rolin, Curtis W Hill, Jeffrey C Brewer, Dennis S Tucker, Z-Y Cheng
Influences of process conditions on microstructure and dielectric properties of ceramic-polymer composites are systematically studied using CaCu3Ti4O12 (CCTO) as filler and P(VDF-TrFE) 55/45 mol.% copolymer as the matrix by combining solution-cast and hot-pressing processes. It is found that the dielectric constant of the composites can be significantly enhanced-up to about 10 times - by using proper processing conditions. The dielectric constant of the composites can reach more than 1,000 over a wide temperature range with a low loss (tan δ ~ 10(-1))...
October 21, 2016: Scientific Reports
S Varitis, P Kavouras, E Pavlidou, E Pantazopoulou, G Vourlias, K Chrissafis, A I Zouboulis, Th Karakostas, Ph Komninou
The vitrification process was applied for the stabilization and solidification of a rich in chromium ash that was the by-product of incineration of tannery sludge. Six different batch compositions were produced, based on silica as the glass former and sodium and calcium oxides as flux agents. As-vitrified products (monoliths) were either composed of silicate matrices with separated from the melt Eskolaite (Cr2O3) crystallites or were homogeneous glasses (in one case). All as-vitrified products were thermally treated in order to transform them to partially crystallized, i...
October 17, 2016: Waste Management
Kuang-Wei Hsu, Yu-Fu Shen, Pein-Chi Wei
STATEMENT OF PROBLEM: In addition to the original abutments provided by implant companies, compatible computer-aided design and computer-aided manufacturing (CAD-CAM) abutments are also available from different manufacturers. However, the combination of abutments and implant systems from different manufacturers may lead to mechanical problems between components. Little has been reported on the clinical performance of this treatment option. PURPOSE: The purpose of this retrospective case series was to evaluate the outcome of compatible CAD-CAM titanium abutments (TiAs) for posterior single-implant tooth replacement (PSITR) up to 6 years after insertion...
October 17, 2016: Journal of Prosthetic Dentistry
Doğu Ömür Dede, Gözlem Ceylan, Burak Yilmaz
STATEMENT OF PROBLEM: Resin cements are available in various shades from different manufacturers. However, there is no standard for the optical properties of these cements, which may result in differences in the color of translucent ceramic restorations. PURPOSE: The purpose of this in vitro study was to evaluate the effects of different shades and brands of resin cements on the color of a lithium disilicate ceramic. MATERIALS AND METHODS: Ten ceramic disks (11×1...
October 17, 2016: Journal of Prosthetic Dentistry
Kai Li, Jiangming Yu, Youtao Xie, Mingyu You, Liping Huang, Xuebin Zheng
Ideal coatings for orthopedic implants should be able to induce excellent osseointegration with host bone tissue, which requires good osteogenic responses and limited inflammatory reactions. Cerium oxide (CeO2) ceramics have anti-oxidative properties and can be used to decrease mediators of inflammation, making them attractive for biomedical application. In this study, two kinds of CeO2 incorporated calcium silicate coatings (CS-10Ce and CS-30Ce) were prepared via plasma spraying technique, and the effects of CeO2 addition on the responses of bone mesenchymal stem cells (BMSCs) and RAW264...
October 20, 2016: Biological Trace Element Research
Alice Ricardo-Silva, Teresa Cristina Monte Gonçalves, José Francisco Luitgards-Moura, Catarina Macedo Lopes, Silvano Pedrosa da Silva, Amanda Queiroz Bastos, Nathalia Coelho Vargas, Maria-Rosa Goreti Freitas
During a medical entomology course in Boa Vista, Roraima, colonies of Triatoma maculata closely associated with pigeon nests were observed in concrete air-conditioner box located on the external plastered and cemented walls of a modern brick-built apartment block. In only one eight-hole ceramic brick, located inside one air-conditioner box, 127 specimens of T. maculata were collected. T. maculata is a recognised vector of Trypanosoma cruzi in the surrounding area and its domiciliation increases the risk of Chagas disease transmission...
October 13, 2016: Memórias do Instituto Oswaldo Cruz
Chu-Qiang Qin, Dong-Sheng Huang, Chi Zhang, Bin Song, Jian-Bin Huang, Yue Ding
BACKGROUND: Aseptic loosening is a significant impediment to joint implant longevity. Prosthetic wear particles are postulated to play a central role in the onset and progression of periprosthetic osteolysis, leading to aseptic loosening of the prosthesis. METHODS: We investigated the inhibitory effects of a lentivirus-mediated short hairpin RNA that targets the TNF-alpha gene on the particle-induced inflammatory and osteolytic changes via macrophages both in vitro and in vivo...
October 18, 2016: BMC Musculoskeletal Disorders
Michael Fralick, Aaron Thomspson, Ophyr Mourad
No abstract text is available yet for this article.
October 17, 2016: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
Mónica Terán-Hernández, Fernando Díaz-Barriga, Ana Cristina Cubillas-Tejeda
Objective To carry out a diagnosis of children's environmental health and an analysis of risk perception in indigenous communities of the Huasteca Sur region of San Luis Potosí, Mexico, in order to design an intervention strategy in line with their needs. Methods The study used mixed methods research, carried out in two phases. It was conducted in three indigenous communities of Tancanhuitz municipality from January 2005 to June 2006. In the adult population, risk perception was analyzed through focus groups, in-depth interviews, and questionnaires...
February 2016: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
Weihua Xie, Songhe Meng, Hua Jin, Chong Du, Libin Wang, Tao Peng, Fabrizio Scarpa, Chenghai Xu
This paper presents a simple methodology to perform a high temperature coupled thermo-mechanical test using ultra-high temperature ceramic material specimens (UHTCs), which are equipped with chemical composition gratings sensors (CCGs). The methodology also considers the presence of coupled loading within the response provided by the CCG sensors. The theoretical strain of the UHTCs specimens calculated with this technique shows a maximum relative error of 2.15% between the analytical and experimental data. To further verify the validity of the results from the tests, a Finite Element (FE) model has been developed to simulate the temperature, stress and strain fields within the UHTC structure equipped with the CCG...
October 13, 2016: Sensors
Jinling Liu, Yiguang Wang, Linan An
Silica is the most abundant mineral in the crust of the Earth. It has been demonstrated that the aluminum concentration in silica plays a key role in determining many properties of silica-based components. Although the alumina-silica system has been intensely studied, the effect of very small amounts of aluminum on the structure and properties of silica remains unclear. We report results of first principles calculations showing that small amounts of aluminum could be metastable when located in the center of Si-O rings without breaking the silica network...
October 18, 2016: Scientific Reports
Liangfa Hu, Morgan O'Neil, Veysel Erturun, Rogelio Benitez, Gwénaëlle Proust, Ibrahim Karaman, Miladin Radovic
The prospect of extending existing metal-ceramic composites to those with the compositions that are far from thermodynamic equilibrium is examined. A current and pressure-assisted, rapid infiltration is proposed to fabricate composites, consisting of reactive metallic and ceramic phases with controlled microstructure and tunable properties. An aluminum (Al) alloy/Ti2AlC composite is selected as an example of the far-from-equilibrium systems to fabricate, because Ti2AlC exists only in a narrow region of the Ti-Al-C phase diagram and readily reacts with Al...
October 18, 2016: Scientific Reports
J Mesquita-Guimarães, M A Leite, J C M Souza, B Henriques, F S Silva, D Hotza, A R Boccaccini, M C Fredel
In this work, TiO2 ceramic scaffolds were fabricated by the replica method using polyurethane (PU) sponges. Suspensions with high solid content were used to achieve scaffolds with improved mechanical behavior. TiO2 ceramic suspensions were optimized by rheological studies using different additives. It was found that the composition with 0.5 wt% Darvan enhanced the covering of the sponge struts. PU sponges of 45 to 80 ppi (pore per inch) were well coated without clogging pores. A thermal treatment with varying holding times, temperatures and heating rates was adjusted...
October 17, 2016: Journal of Biomedical Materials Research. Part A
Xiang Lv, Zhuoyun Li, Jiagang Wu, Dingquan Xiao, Jianguo Zhu
It is a tough issue to develop dense and water resistant KNbO3 ceramics duo to high evaporation and hygroscopicity of K2O. Here, KNbO3: xZnO composite ceramics were used to successfully solve this problem, where ZnO particles were randomly distributed into KNbO3 matrix. The addition of ZnO hardly affects phase structure of KNbO3, and moreover the enhancement of electrical properties, thermal stability and aging characteristics was observed in KNbO3: xZnO composite ceramics. The composites possessed the maximum d33 of 120±5 pC/N, which is superior to pure KNbO3 (d33=80 pC/N)...
October 17, 2016: ACS Applied Materials & Interfaces
Shotaro Kitajima, Hiroaki Nakao, Akira Shirakawa, Hideki Yagi, Takagimi Yanagitani
Yb:LuAG is a promising gain medium for high-power lasers due to its high thermal conductivity and large emission cross section. Although narrowband gain media such as Yb:LuAG are not considered to be suitable for the generation of sub-100 fs pulses, we have achieved generation of 91 fs pulses with Yb:LuAG ceramic by the Kerr-lens mode-locking (KLM) technique. The obtained average power, pulse energy, and peak power were 1.64 W, 20.0 nJ, and 220 kW, respectively. These are, to the best of our knowledge, the first demonstration of KLM and the new records based on both Yb:LuAG ceramic and single crystal...
October 1, 2016: Optics Letters
Toshitake Furusawa, Tsutomu Minatoya, Toshimitsu Okudera, Yasuo Sakai, Tomohiro Sato, Yuta Matsushima, Hidero Unuma
BACKGROUND: In an attempt to prepare scaffolds with porosity and compressive strength as high as possible, we prepared porous β-tricalcium phosphate (TCP) scaffolds and coated them with regenerative medicine-grade gelatin. The effects of the gelatin coating on the compressive strength and in vivo osteoblast compatibility were investigated. METHODS: Porous β-TCP scaffolds were prepared and coated with up to 3 mass% gelatin, and then subjected to thermal cross-linking...
December 2016: Int J Implant Dent
Nejdet Değermenci, İbrahim Cengiz, Ergun Yildiz, Alper Nuhoglu
In this study, following the pre-treatment of olive mill wastewater (OMW), its treatment in a jet loop membrane bioreactor (JLMBR) was investigated. Among the pre-treatment options, the configuration composed of physical settling, cartridge filter and ceramic membrane showed the best performance in terms of investigated parameters. For the JLMBR that was fed by pretreated OMW, up to 93 and 87% removal efficiencies were achieved for the chemical oxygen demand (COD) and total phenol, respectively, at volumetric organic load (VOL) of 17...
October 12, 2016: Journal of Environmental Management
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"