Results 61 to 70 of about 1,961,451 (191)

Surface Studies on Glass Powders Used in Commercial Glass-Ionomer Dental Cements

open access: yesMolecules, 2021
The surface properties of three commercial ionomer glass powders, i.e., Fuji IX, Kavitan Plus and Chemadent G-J-W were studied. Samples were analyzed by X-ray fluorescence spectroscopy (XRF), and the density was determined by gas pycnometry.
Agata Wawrzyńczak   +3 more
doaj   +1 more source

Effects of Different Glaze Treatments on the Optical Properties and Roughness of Lithium Disilicate Ceramics

open access: yesCumhuriyet Dental Journal, 2019
Objectives: To investigate effects of different glaze procedures on the colour, translucency, and roughness of lithium disilicate (LDS) ceramics after short-term ageing.Materials and Methods: Eighteen LDS specimens (thickness: 0.6 mm) were divided into ...
Gülce Alp, Meryem Gülce Subaşı
doaj   +1 more source

The Effect of Gasification Conditions on the Surface Properties of Biochar Produced in a Top-Lit Updraft Gasifier

open access: yesApplied Sciences, 2020
The effect of airflow rate, biomass moisture content, particle size, and compactness on the surface properties of biochar produced in a top-lit updraft gasifier was investigated. Pine woodchips were studied as the feedstock.
Arthur M. James R.   +4 more
doaj   +1 more source

Effect of Different Surface Treatments on the Repair of Aged Bulk-Fill Composites: An In Vitro Study

open access: yesCumhuriyet Dental Journal, 2019
Objectives: The aim of this in vitro study was to evaluate the efficiency of different surface treatments on the microtensile bond strength (µTBS) of aged bulk-fill composite.Materials and Methods: Sixty bulk-fill resin-based composite (RBC) specimens in
Soner Şişmanoğlu
doaj   +1 more source

Wave transmission across surface interfaces in lattice structures [PDF]

open access: yes, 2019
Within the lattice dynamics formulation, we present an exact solution for anti-plane surface waves in a square lattice strip with a surface row of material particles of two types separated by a linear interface. The considered problem is a discrete analog of an elastic half-space with surface stresses modelled through the simplified Gurtin-Murdoch ...
arxiv   +1 more source

The Gauss map for Lagrangean and isoclinic surfaces [PDF]

open access: yesarXiv, 2013
Simple properties of the Gauss map characterise important classes of surfaces in $\Rq$: $R$-surfaces, the real version of plane complex curves; Lagrangean surfaces; isoclinic surfaces.
arxiv  

Bour's spacelike maximal and timelike minimal surfaces in the 3-dimensional Minkowski space [PDF]

open access: yesarXiv, 2014
Bour's minimal surface has remarkable properties in three dimensional Minkowski space. We reveal the definite and indefinite cases of the Bour's surface using Weierstrass representations, and give some differential geometric properties of the astonishing maximal and minimal surfaces.
arxiv  

A new kind of helicoidal surface of value m [PDF]

open access: yesarXiv, 2014
We define a new kind of helicoidal surface of value m. A rotational surface which is isometric to the helicoidal surface of value m is revealed. In addition, we calculate some differential geometric properties of the helicoidal surface of value 3 in three dimensional Euclidean space.
arxiv  

Evaluation of the surface roughness of a nanofilled composite resin submitted to different smoothing and finishing techniques

open access: yesRevista de Odontologia da UNESP
Introduction: Controlling the surface smoothness characteristics of the composite resin when performing a direct restorative technique is one of the factors involved in achieving restorative success.
Micheli Del Frari ANSUJ   +4 more
doaj   +1 more source

Evaluation of surface physical properties of acrylic resins for provisional prosthesis

open access: yesMaterials Research, 2008
Acrylic resins used for provisional prostheses should have satisfactory superficial characteristics in order to ensure gingival health and low bacterial attachment.
Sérgio Paulo Hilgenberg   +5 more
doaj   +1 more source

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