scholarly journals SEM INVESTIGATIONS ON OLD MAPS WITH CANVAS SUPPORT

2019 ◽  
Vol 2019 ◽  
pp. 153-157 ◽  
Author(s):  
Dorina Camelia ILIES ◽  
Liliana INDRIE ◽  
Jan WENDT ◽  
Alexandru ILIES ◽  
Ovidiu GACEU ◽  
...  

Digitization of cultural heritage, has started to play a major role in sustainability; also, old maps investigations can be a valuable source of information. These should be carefully handled by archive workers and those who are studying them, because mycological content can increase both human health and environmental problems. These, together with the conditions in which are stored can deteriorate the composition of the cellulose fibers, respectively the canvas fibers on which are glued. Samples were collected from old maps dating to 1895 and 1910 by specific means and methods in order to investigate their mycological content which revealed the presence of Penicillium ssp and Fusarium spp. Scanning electron microscopy - analysis (SEM) was done for the mentioned materials in order to determinate the deterioration of the fibers.

2018 ◽  
Vol 44 (4) ◽  
pp. 287-291
Author(s):  
Rafael Manfro ◽  
Gislaine Felipe Garcia ◽  
Marcelo Carlos Bortoluzzi ◽  
Vinicius Fabris ◽  
Atais Bacchi ◽  
...  

2018 ◽  
Vol 12 (03) ◽  
pp. 403-409 ◽  
Author(s):  
Ricardo Machado ◽  
Daniel Comparin ◽  
Eduardo Donato Eing Engelke Back ◽  
Lucas da Fonseca Roberti Garcia ◽  
Luiz Rômulo Alberton

ABSTRACT Objective: The purpose of this study was to compare the amount of residual smear layer after root canal instrumentation by using Ni-Ti, M-Wire, and CM-Wire instruments. Materials and Methods: Seventy-two mandibular incisors were randomly divided into six groups according to the system used: WaveOne (WO), Reciproc (RP), Unicone (UC), ProTaper Next (PN), Mtwo (MT), and HyFlex (HF). Afterward, the specimens were cleaved in the mesiodistal and buccolingual direction for analysis by scanning electron microscopy. Results: Considering both directions and root canal thirds, there was no difference between HF, MT, and PN. RP, UC, and WO presented a significant difference between the directions, and the cervical third showed a significantly smaller quantity of residual smear layer compared with the apical third. When the systems were compared among them, there was a significant difference only between RP and WO. Conclusions: Residual smear layer observed after instrumentation with the different systems was similar, except for quantities between the reciprocating systems.


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