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All Journal Jurnal Forum Nuklir Ganendra: Majalah IPTEK Nuklir Denta: Jurnal Kedokteran Gigi
Aryadi Aryadi
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Computer Science & IT Dentistry Materials Science & Nanotechnology Other

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PENGGUNAAN GRAFIT BATU BATERAI SEBAGAI ALTERNATIF ELEKTRODA SPEKTROGRAFI EMISI Arif Artadi; Sudaryo Sudaryo; Aryadi Aryadi
Jurnal Forum Nuklir JFN Vol 1 No 2 November 2007
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (296.714 KB) | DOI: 10.17146/jfn.2007.1.2.3276

Abstract

KEMUNGKINAN PENGGUNAAN GRAFIT BATU BATERAI SEBAGAI ALTERNATIF ELEKTRODA SPEKTROGRAFI EMISI. Telah dilakukan analisis boron (B) dan kadmium (Cd) di dalam U3O8 dengan menggunakan elektroda grafit baterai bekas  pada  spektrografi  emisi.  Analisis  dilakukan  dengan  metode  DC-Arc,  arus  10Ampere, tegangan 220 Volt, waktu exposure 25 detik, jarak elektroda 2 mm. Cuplikan diekstraksi menggunakan TBP-Kerosin dengan perbandingan 70 : 30 sebanyak 200 ml. Fasa air hasil ekstraksi diteteskan pada elektroda dan dieksitasi. Intensitasnya dibandingkan dengan standarnya, maka diperoleh konsentrasi boron dan kadmium terukur dengan elektroda grafit spex industries masing-masing 0,07 ppm dan 0,15 ppm, yang terukur dengan elektroda grafit baterai bekas adalah 0,21 ppm dan 0,14 ppm. Dari hasil tersebut, dapat disimpulkan bahwa elektroda grafit batu baterai tidak dapat digunakan sebagai alternatif elektroda pengganti pada spektrografi emisi.
THE USE OF DIGITAL IMAGE PROCESSING IN ANALYSIS OF BORON, CADMIUM IN THORIUM OXIDE WITHOUT CARRIER DISTILATION WITH EMISSION SPECTROGRAPH METHOD Sahat Simbolon; Aryadi Aryadi; Muhtadan Muhtadan
GANENDRA Majalah IPTEK Nuklir Volume 15 Nomor 1 Januari 2012
Publisher : Website

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.488 KB) | DOI: 10.17146/gnd.2012.15.1.24

Abstract

THE USE OF DIGITAL IMAGE PROCESSING IN ANALYSIS OF BORON, CADMIUM IN THORIUM OXIDEWITHOUT CARRIER DISTILLATION EMISSION SPECTROGRAPH METHOD. The use of digital imageprocessing in direct determination elements of highly absorption cross-section of thermal neutron such as B andCd in nuclear fuel ThO2 without carrier distillation was described. Working and counter electrode should bemodified because volume of the sample was larger than the traditional one. Firstly, analysis of B and Cd in ThO2was recorded by X-ray film for thorax and then was proceeded by mini digital camera. All files in mini digitalcamera were transferred to computer and read by digital image processing of Matlab software. It was found thatall line spectra became Gaussian shape. Since couple of camera position and lightening system had not beendone successfully yet, therefore, quantitative analysis could not been done yet, meanwhile qualitative analysishad already been done by analysis spectra after image processing. It is easier to analysis B and Cd qualitativelyuse of image processing than densitometer instrument.Keywords : Thorium Oxide, Carrier Distillation, Image Processing, Digital Camera
The Toxicity Assessment of Hydroxyapatite with Theobromine Formulation on Human Dental Pulp Stem Cells (hDPSC) Clara Pricilla Suarthana; Elline Elline; Anastasia Elsa Prahasti; Aryadi Aryadi
Denta Journal Kedokteran Gigi Vol 19 No 1 (2025): Februari
Publisher : Fakultas Kedokteran Gigi Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/denta.v19i1.7

Abstract

Background: Deep caries not treated immediately can cause more severe damage and loss of tooth vitality. Ca(OH)2 and MTA are often used as vital pulp treatment materials, but both have limitations. Therefore, alternative materials are needed. Hydroxyapatite is a major component of bones and teeth forms reparative dentin without tunnel defects, while theobromine has been shown to have a better anti-cariogenic effect than fluoride. The combination of both can be a choice for vital pulp treatment. Therefore, conducting cytotoxicity and cell proliferation tests is important to ensure safety and determine whether the material can induce cell proliferation. Objective: To determine the toxicity and proliferation of hydroxyapatite theobromine on human dental pulp stem cells. Materials and Methods: The toxicity assessment of hydroxyapatite with theobromine formulation on human dental pulp stem cells (hDPSC) was a laboratory experimental study (in vitro) carried out using a posttest control group design with the method used being the MTT assay. Results: The highest cell viability value was Ca(OH)2 122.08%, control cells 113.70%, HA/TB 2:1 108.03%, HA/TB 1:1 103.23%, HA/TB 1:2 102.09%, and the lowest was negative control 100%. The highest proliferation value was in control cells 138.00%, HA/TB 2:1 135.00%, HA/TB 1:2 129.64%, Ca(OH)2 128.38%, and HA/TB 1:1 122.11%, and the lowest cell proliferation value was in the negative control at 100%. This shows that the higher the hydroxyapatite value compared to theobromine, the greater the percentage value. Conclusion: Theobromine hydroxyapatite formulation is non-toxic, so it has potential as a vital pulp treatment ingredient, but it is less effective in inducing cell proliferation.  
Co-Authors Anastasia Elsa Prahasti Arif Artadi Clara Pricilla Suarthana Elline, Elline Muhtadan Muhtadan Sahat Simbolon Sudaryo Sudaryo