نتایج جستجو برای: powders

تعداد نتایج: 11384  

2017
Rosalin Hongsathavij Yosvimol Kuphasuk Kanyawat Rattanasuwan

OBJECTIVES Air polishing with sodium bicarbonate powders with a grain size of 40 μm is recommended for patient comfort. However, the efficacy of small grain size on stain removal has not been adequately studied. This study aimed to compare the stain removal efficacy of sodium bicarbonate powders with grain sizes of 65 and 40 μm and to evaluate patient acceptance and operator opinion after using...

Journal: :Journal of materials science. Materials in medicine 2009
Chiara Vitale-Brovarone Francesco Baino Enrica Verné

This research work is focused on the preparation of macroporous glass-ceramic scaffolds with high mechanical strength, equivalent with cancellous bone. The scaffolds were prepared using an open-cells polyurethane sponge as a template and glass powders belonging to the system SiO(2)-P(2)O(5)-CaO-MgO-Na(2)O-K(2)O. The glass, named as CEL2, was synthesized by a conventional melting-quenching route...

Journal: :Materials science & engineering. C, Materials for biological applications 2016
Arturo Olvera Salazar Margarita García Hernández Perla Yolanda López Camacho Arturo López Marure Adriana Isabel Reyes de la Torre Ángel de Jesús Morales Ramírez Felipe Hernández Santiago Luciano Aguilera Vázquez

This paper presents the synthesis of pure and europium-doped lutetium oxide (Lu2O3) powders prepared by sol-gel method. The influence of europium ion concentration into Lu2O3 nanocrystallites was investigated for first time in an in vitro system using a modified ABTS radical cation decolorization assay to determine the antioxidant activity. The crystalline structure of Lu2O3 and Eu:Lu2O3 powder...

2017
C. Lin P. Kuo J. Shih C. H. Lin

BaFelp z.Co.-,Sn,Ni,01 I hexagonal-plated-shaped barium ferrite powders mere prepared by chemical pricipitation and subsequent heat treatment to investigate the effects of Ni ion on the magnetic properties of the barium ferrite powders. Experimental results indicates that if the y value in the chemical formula is varied and the x value is maintained constant, i.e. the partial replacement of Co ...

2009
Mehmet TÜRKER

In this study pure Al and pre-alloyed Al alloy powders (Alumix 231Al-Cu %2.5-Mg %0.5–Si %14) with or without reinforcing elements were used to produce classical Al foam or spherical Al foam with various production parameters by using powder metallurgy route and the results obtained have been discussed. Al2O3 and SiC particles were used as reinforcing elements and TiH2 powders were used as foami...

2012
Hiroki Uehara Hidekazu Tanaka Takeshi Yamanobe

The relaxation behaviors of several commercial ultra-high-molecular-weight polyethylene (UHMW-PE) reactor powders were compared. The surface and internal morphologies of these powders were characterized by scanning and transmission electron microscopy observations. On the basis of these morphological analyses, the reactor powder consisted of particles and fibrils between them, the relative amou...

2012
P. and Siripongvutikorn W. and Sirivongpaisal

This study was to utilize the waste from canned tuna processing (tuna precooking juice) for producing dried tuna flavor powder. Tuna precooking juice was centrifuged and concentrated to 15% total soluble solid (TSS). Maltodextrin (DE 9) was added to increase the TSS of tuna precooking concentrate to 20, 22, 24 and 26%, then dried by spray dryer at 180oC inlet air temperature. The compositions a...

2017
Ashley P. DeAnglis Israel Nur Anne J. Gorman Roberto Meidler

Thrombin and fibrinogen powders are the active components of advanced surgical hemostasis products including the EVARREST Fibrin Sealant Patch. Measuring the enzymatic activity of thrombin in the presence of fibrinogen is challenging, as hydration of the powders in a neutral aqueous environment will cause the enzyme to rapidly react with the fibrinogen to form a fibrin clot, which in turn binds...

Journal: :Journal of colloid and interface science 2009
J C Sczancoski L S Cavalcante M R Joya J W M Espinosa P S Pizani J A Varela E Longo

SrWO(4) powders were synthesized by the co-precipitation method and processed in a microwave-hydrothermal (MH) at 140 degrees C for different times. The obtained powders were analyzed by X-ray diffraction (XRD), micro-Raman (MR) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, field-emission gun scanning electron microscopy (FEG-SEM), ultraviolet-visible (UV-vis) absorption spectr...

Journal: :international journal of nanoscience and nanotechnology 2010
j. jasmine ketzial a. samson nesaraj

in order to reduce the operating temperature of solid oxide fuel cells (sofcs), novel electrolyte materials based on ceo2 and baceo3 are being developed in the scientific realm. in this context, we propose a new methodology for preparing the nano-ceramic composite materials such as bace0.9gd0.9o3-δ – ce0.9gd0.9o2-δ (bcgo–cgo) and bace0.8sm0.2o3-δ – ce0.8sm0.2o2-δ (bcso – cso) as possible elec...

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