Atomic Absorption Spectrometry and Scanning Electron Microscopy Evaluation of Concentration of Calcium Ions and Smear Layer Removal With Root Canal Chelators

2009 ◽  
Vol 35 (5) ◽  
pp. 727-730 ◽  
Author(s):  
Júlio César Emboava Spanó ◽  
Ricardo Gariba Silva ◽  
Débora Fernandes Costa Guedes ◽  
Manoel Damião Sousa-Neto ◽  
Carlos Estrela ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Calcium Ions ◽  
Root Canal ◽  
Absorption Spectrometry ◽  
Smear Layer ◽  
Scanning Electron Microscopy Evaluation ◽  
Scanning Electron

scholarly journals Recovery Logam Krom (VI) Menggunakan Polymer Inclusion Membran (PIM) dengan Senyawa Pembawa Aliquat 336, Topo dan Campuran Aliquat 336-Topo

2011 ◽  
Vol 14 (3) ◽  
pp. 77-82
Author(s):  
Khoirin Nita Ulfia ◽  
Khabibi Khabibi ◽  
Muhammad Cholid Djunaidi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Aliquat 336 ◽  
Scanning Electron

Telah dilakukan penelitian tentang recovery logam krom (VI) menggunakan polymer inclusion membran (PIM) dengan senyawa pembawa aliquat 336, TOPO, dan campuran aliquat 336-TOPO. Tujuan penelitian ini adalah untuk menghasilkan PIM, melakukan pemisahan ion krom (VI) menggunakan PIM dengan senyawa tunggal aliquat 336, TOPO, dan campuran aliquat 336-TOPO, menentukan pengaruh komposisi senyawa pembawa, pengaruh konsentrasi fasa umpan, waktu pengadukan, dan frekuensi pemakaian membran terhadap transpor ion logam krom (VI). Efisiensi pemisahan diketahui dengan menentukan pengaruh komposisi senyawa pembawa, menentukan kadar ion krom (VI) dengan variasi konsentrasi fasa umpan, ketebalan membran, dan banyaknya pemakaian membran menggunakan AAS (Atomic Absorption Spectrometry). Morfologi permukaan membran dapat diketahui dengan menggunakan SEM (Scanning Electron Microscopy). Pada proses transpor, fasa umpan adalah limbah elektroplating yang mengandung logam krom dengan pH 4,4 sedangkan fasa penerima adalah larutan NaCl 2 N dengan pH 6,3. Analisis gugus fungsi komponen penyusun membran dilakukan dengan spektroskopi FTIR. Hasil penelitian menunjukkan bahwa transpor ion logam krom (VI) dipengaruhi oleh senyawa pembawa aliquat 336 dan campuran aliquat 336-TOPO. Keduanya lebih mempengaruhi transpor dibandingkan TOPO saja. Konsentrasi fasa umpan dengan konsentrasi awal 8,5 ppm, waktu pengadukan selama 72 jam, serta pemakaian pertama menghasilkan transpor ion logam terbanyak. Transpor terbanyak yaitu 97,8 % dari fasa umpan dan 76,5 % yang tertranspor ke fasa penerima.

Washing, Spraying and Brushing. A Comparison of Paper Deacidification by Magnesium Hydroxide Nanoparticles

2015 ◽  
Vol 36 (1) ◽  
Author(s):  
Adam Wójciak
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Magnesium Hydroxide ◽  
Absorption Spectrometry ◽  
X Ray ◽  
Water Extracts ◽  
Magnesium Hydroxide Nanoparticles ◽  
Scanning Electron

AbstractThe paper presents the results of studies on the deacidification of model papers (Whatman) using nanodispersions of magnesium hydroxide in 2-propanol. Preliminary experiments showed greater effectiveness of nanodispersion deacidification in comparison with the standard magnesium hydroxide reagent which was applied in the form of micrometric particles. Further analyses compared the effectiveness of deacidification by washing, spraying and brushing. Although all of the tested methods caused an increase in the pH of paper water extracts, the assays of magnesium contents using Atomic Absorption Spectrometry (AAS) and Scanning Electron Microscopy with an Energy Dispersive X-ray spectrometer (SEM-EDX) showed greatest effectiveness of deacidification by washing. Dispersion spraying requires repetition of the operation at least three times in order to provide an effect that would be comparable with that of washing. Brushing seems to be a less effective method of magnesium hydroxide application to paper. When comparing uniformity of magnesium application on the surface of the paper samples (mapping, SEM-EDX), it was found that the deacidifier was distributed more uniformly when sprayed than in the case of washing.

scholarly journals Residual smear layer after root canal instrumentation by using Niti, M-Wire and CM-Wire instruments: A scanning electron microscopy analysis

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
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Root Canal ◽  
Smear Layer ◽  
Significant Difference ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Root Canal Instrumentation ◽  
Reciprocating Systems ◽  
Scanning Electron

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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