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Source: HSJ - Category: UK Health Source Type: news

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Publication date: Available online 22 February 2019Source: ProtistAuthor(s): Miguel M. Sandin, Loic Pillet, Tristan Biard, Camille Poirier, Estelle Bigeard, Sarah Romac, Noritoshi Suzuki, Fabrice NotNassellaria are marine protists belonging to the Radiolaria lineage (Rhizaria). Their skeleton, made of opaline silica, exhibit an excellent fossil record, extremely valuable in micro-paleontological studies for paleo-environmental reconstruction. Yet, to date very little is known about the extant diversity and ecology of Nassellaria in contemporary oceans, and most of it is inferred from their fossil record. Here we present an...
Source: Protist - Category: Molecular Biology Source Type: research
Authors: Sousa MP, Tribst JPM, de Oliveira Dal Piva AM, Borges ALS, de Oliveira S, da Cruz PC Abstract Because the main complication of implant-supported prostheses is torque loosening and/or fixation screw fracture, the goal of this study was to evaluate the torque before and after fatigue (screw placement and removal, respectively), single load-to-failure (compression test), and stress concentration of straight and angled abutments. Eighty implants were included in polyurethane cylinders. Half of the implants received straight abutments (group S, n = 40) and the other half received angled abutments (group A, n = ...
Source: International Journal of Periodontics and Restorative Dentistry - Category: Dentistry Tags: Int J Periodontics Restorative Dent Source Type: research
Publication date: Available online 22 February 2019Source: Carbohydrate PolymersAuthor(s): Peng Wang, Huawei He, Rui Cai, Gang Tao, Meirong Yang, Hua Zuo, Ahmad Umar, Yejing WangAbstractDeveloping biomaterials based on the natural biomacromolecule silk sericin from Bombyx mori cocoon is of great interest for biomedical application. Dialdehyde carboxymethyl cellulose (DCMC) is derived from periodate oxidation of carboxy- methyl cellulose. Here, we developed a novel strategy of cross-linking of sericin with DCMC via the Schiff’s base reaction. Fourier transform infrared spectroscopy and scanning electron microscopy ind...
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research
Publication date: Available online 22 February 2019Source: Carbohydrate PolymersAuthor(s): Luna Liang, Chen Huang, Naijia Hao, Arthur J. RagauskasAbstractAligned micro- and nanoporous materials have gained tremendous interest since they provide great potential in organic electronics, absorbents, biomedicine and tissue engineering. Herein, cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs) cross-linked with poly(methyl vinyl ether-co-maleic acid) (PMVEMA) and poly(ethylene glycol) (PEG) foams were prepared by both the directional and un-directional freezing technique. Aligned three-dimensional porous structures ...
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research
Publication date: May 2019Source: Biomedical Signal Processing and Control, Volume 51Author(s): Jinhua Sheng, Bocheng Wang, Yangjie Ma, Qingqiang Liu, Weixiang Liu, Bin Chen, Meiling ShaoAbstractEstimation of sensitivity profile in SENSE-like methods plays a crucial role in reconstruction. The self-calibration of sensitivity eliminates the separate calibrating scan and therefore reduces imaging time. However, sensitivity estimation by zero-filling in each column outside region of the object introduces inaccuracy and artifacts into the results, especially for the image periphery. Noise and error may propagate to reconstruct...
Source: Biomedical Signal Processing and Control - Category: Biomedical Science Source Type: research
Publication date: May 2019Source: Microchemical Journal, Volume 146Author(s): Lucas P. Bressan, Jessica Robles-Najar, Cristina B. Adamo, Reverson F. Quero, Brenda M.C. Costa, Dosil P. de Jesus, José A.F. da SilvaAbstractFor the first time, a 3D-printed microfluidic device based on fused deposition modeling was created using poly(lactic acid) as the 3D-printed part on top of a poly(methyl methacrylate) slide, allowing the creation of transparent microfluidic channels and used on the continuous-flow synthesis of silver and gold nanoparticles. In order to reduce fouling inside the microchannels, the device was optimize...
Source: Microchemical Journal - Category: Chemistry Source Type: research
Publication date: 15 April 2019Source: Journal of Non-Crystalline Solids, Volume 510Author(s): Filipp O. Milovich, Liudmila D. Iskhakova, Mikhail Yu. Presniakov, Aleksander L. Vasiliev, Vladimir I. Bondarenko, Sergey E. Sverchkov, Boris I. GalaganAbstractBi-activated glasses from the MgO-Al2O3-SiO2 system with IR luminescence in the region of 1050–1600 nm have been studied by the high-angle annular dark-field scanning transmission electron microscopy. It was found that individual bismuth ions are present in all samples. Presumably, these ions are Bi3+ with low coordination number in the glass network or the subvale...
Source: Journal of Non Crystalline Solids - Category: Chemistry Source Type: research
Publication date: Available online 22 February 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Yu-Ju Chen, Ting-Hao Yang, Jen-Lin Chang, Wan-Ling Cheng, Annamalai Senthil Kumar, Jyh-Myng ZenAbstractSearch for simple and economical electrocatalyst for the hydrogen gas evolution reaction (HER), which can resemble to the performance of Pt and other precious metals, is a challenging research interest. In this work, a systematic effect of pre-treatment potential of screen-printed carbon (SPCE) surface on the HER performance in 0.5 M H2SO4 was carried out. A new observation of a low potential HER (onset potential,...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: 5 June 2019Source: Journal of Alloys and Compounds, Volume 788Author(s): Sutripto Majumder, Avinash C. Mendhe, Dojin Kim, Babasaheb R. SankapalAbstractThin film consisting of hierarchical cadmium oxide nanonecklaces has been synthesized through room temperature chemically deposited cadmium hydroxide nanowires as template followed by air annealing. Formation of thin film has been confirmed with aid of structural, surface morphological, valence state and optical, studies performed by X-ray diffraction, Raman analysis, scanning electron microscopy, X-ray photoelectron spectroscopy, and UV–visible spect...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
Publication date: 5 June 2019Source: Journal of Alloys and Compounds, Volume 788Author(s): Jili Wu, Lin Xu, Zhen PengAbstractIn this work, an as-cast Fe50Ni30P13C7 bulk metallic glass, which has large plastic strain (>20%) and without final fracture in compression, was systematically investigated with nanoindentation creep to uncover the structural relationships with its plastic deformation. The X-ray diffraction, differential scanning calorimetry and transmission electronic microscopy indicated that as-cast bulk metallic glass is of fully and stably amorphous nature. Three positions, from inner to outer of as-cast bulk...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
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