Analysis of surface morphology and elemental composition on zirconia implants before and after photofunctionalization by scanning electron microscopy and energy dispersive X ray spectroscopy – An In vitro study

Abstract:An innovative approach, combining field-emission scanning electron microscopy (FESEM) with energy dispersive X-ray spectroscopy (EDX) analysis, is presented to investigate the degradation mechanisms affecting tannin-dyed wool. In fact, tannin-dyed textiles are more sensitive to degradation then those dyed with other dyestuffs, even in the same conservation conditions.FESEM-EDX was first used to study a set of 48 wool specimens (artificially aged) dyed with several raw materials and mordants, and prepared according to historical dyeing recipes. EDX analysis was performed on the surface of wool threads and on their cross-sections. In addition, in order to validate the model formulated by the analysis of reference materials, several samples collected from historical and archaeological textiles were subjected to FESEM-EDX analysis.FESEM-EDX investigations enabled us to reveal the correlation between elemental composition and morphological changes. In addition, aging processes were clarified by studying changes in the elemental composition of wool from the protective cuticle to the fiber core in cross-sections. Morphological and elemental analysis of wool specimens and of archaeological and historical textiles showed that the presence of tannins increases wool damage, primarily by causing a sulfur decrease and fiber oxidation.

Download Full-text

Scanning electron microscopy of enamel cracks after etching: An in vitro study

Journal of Prosthetic Dentistry ◽

10.1016/s0022-3913(75)80170-3 ◽

1975 ◽

Vol 33 (5) ◽

pp. 558-561

Author(s):

Elena L. Liatukas ◽

Raymond F. Young

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

In Vitro Study ◽

Vitro Study ◽

Scanning Electron

Download Full-text

Evaluation of Residual Dentin after Conventional and Chemomechanical Caries Removal Using SEM

Journal of Clinical Pediatric Dentistry ◽

10.17796/jcpd.32.2.44n2787118133880 ◽

2007 ◽

Vol 32 (2) ◽

pp. 115-120 ◽

Cited By ~ 11

Author(s):

Fernanda Nahás Pires Corrêa ◽

Leonardo Eloy Rodrigues Filho ◽

Célia Regina Martins Delgado Rodrigues

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

In Vitro Study ◽

Adhesive System ◽

Smear Layer ◽

Dentinal Tubules ◽

Removal Method ◽

Caries Removal ◽

Scanning Electron

The purpose of this in vitro study was to analyze the residual dentinal surfaces following caries removal using rotatory instruments and two chemomechanical methods (Papacárie® and Carisolv®), by scanning electron microscopy (SEM). Thirty primary incisors were divided into three groups, according to the caries removal method used, and their residual dentin was examined under SEM (15). After caries removal, 15 of these teeth were restored with Single Bond (3M) adhesive system and Z100 Filtek composite resin (3M). The tags of the replicas were observed under SEM. The chemomechanical caries removal methods (Papacárie®and Carisolv®) formed an amorphous layer, similar to the smear layer and few exposed dentinal tubules;the conventional caries removal method produced a smooth and regular dentinal surface, with typical smear layer and exposed dentinal tubules. All groups showed abundant tag formation. Scanning electron microscopy analysis revealed a difference between dentin treated with rotatory instruments and that treated with chemomechanical methods in spite of the occurrence of a similar tag formation in both groups.

Download Full-text

Effect of Joining Process on the Coatings of Self-Piercing Rivets

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.488-489.1501 ◽

2012 ◽

Vol 488-489 ◽

pp. 1501-1505 ◽

Cited By ~ 10

Author(s):

Mahsa Esfahani ◽

Yvonne Durandet ◽

James Wang ◽

Yat Choy Wong

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Optical Microscopy ◽

Mechanical Joining ◽

X Ray ◽

Before And After ◽

Riveting Process ◽

Al Coating ◽

Joining Process ◽

Scanning Electron

In this study, effects of laser assisted self-pierce riveting (LSPR) as a mechanical joining technique were investigated on the coatings of self- piercing rivets. Zn-Sn and Al plated rivets were used to join magnesium sheets by LSPR. Microstructure, surface topography and roughness of the rivet’s coatings were characterized by optical microscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and surface profilometry. A comparison of results before and after joining process showed that under joining conditions, Zn-Sn coating was deformed during riveting process and its thickness and microstructure varied along the rivet shank, while Al coating remained unchanged and no effects of riveting process was detected.

Download Full-text