Perbandingan Pengukuran Pdd Dan Beam Profile Antara Detektor Ionisasi Chamber Dan Gafchromic Film Pada Lapangan 10 X 10 Cm2

The Comparison of PDD and beam profile measurements between detectors Ionization Chamber and Gafchromic film on 10x10 cm2 field. has been done Measurements were made with the detector CC-13s with a volume of 0.13 cc as a reference detector. Measurements were performed using IBA RFA phantom dosimeter. while the film measurement using solid water phantom gafchromic done. Measurements were taken at a field size of 10x10 cm2 in plane 6 MV linac with energy. Profile measurements performed using the SAD technique, with a depth of 10 cm for 6 MV. While the PDD measurements using SSD technique. From the results of this study are expected to know the PDD curve Beam profile and optimal dose measurement accuracy can be achieved in clinical treatment. well as the advantages and disadvantages of each detector and can be taken into consideration in selecting the optimal dosimeter according to the function that will be used

Studi Pengendapan Perak pada Limbah Fixer yang Telah Jenuh dengan Metode Pembakaran dan Pengendapan Naoh dan Na2s

Research has been done in silver recovery in saturated fixer liquid. Silver recovery method that used in this research was sedimentation by using chemical material NaOH and Na2S. Aim of this research is to compare amount of mass of the result of sedimentation method in silver recovery using NaOH and Na2S. This research used NaOH and Na2S in 2 M concentration to saturated fixer liquid at 5 litre amount. Deposits included in koi then burned until 200-3000C of temperature to form two layers. The upper layer was removed homever the layers below let in the koi. Lower layer was burned back with a 400-6000C to remove the rest of the remaining impurities. When the temperature reaches 6000C, put it in a bucket of water in which that liquid will be solidified and acquired a silver metal. Result of The research have showed that silver which is produced in NaOH sedimentation method has 16 gram and 25 gram in using Na2S sedimentation method. Na2S is more profit because produce silver more than NaOH

Penentuan Nilai Koefisien Serapan Bahan dan Dosis Radiasi pada Variasi Kombinasi Kayu dan Aluminium

In testing the material absorption coefficient of lead Pb, teak, ironwood and aluminum: The X-ray unit is set at a fixed voltage, current and time on the conditions of 81 kV and 32 mAs. The distance between the tube to the object as far as 100 cm, Multi Purpose Detector (MPD) is placed under the object, size of field radiation is 5 cm x 5 cm, the center beam is placed right in the middle of the object, then do exposure for each thickness of lead Pb, teak, ironwood, aluminum, combination of aluminum and teak, then combination of ironwood with aluminum performed in sequence according to the variations thickness of the material.The results of material coefficient absorption testing for teak wood, ironwood and aluminum, showed the value of the absorption coefficient (μ) for teak 0,023 /mm, ironwood 0,031 /mm and aluminum 0,102 /mm. Equality results between teak, ironwood and aluminum to the lead Pb at thickness of 2 mm, teak wood 472 mm, ironwood 350 mm and for aluminum 102 mm. In thickness combination of 30 mm teak and 30 mm aluminum, absorbed dose that passes material is 0,042 mGy. For the thickness combination of 30 mm ironwood with 30 mm aluminum, the absorbed dose that passes through the material is 0,035 mGy. To be equal with the lead Pb at 1,3 mm thickness, each material has very far equality value due to the thickness of 1,3 mm Pb can absorb dose that passes through the material equal with 0,001 mGy

Pengaruh Temperatur Sintering terhadap Sifat Optik Lapisan Tipis Zinc Oxide (Zno) yang Dideposisi Diatas Substrat Kaca dan Aplikasinya untuk Mendegradasi Pewarna Methylene Blue

In this research, ZnO thin films have been successfully deposited on glass substrates by spraycoatingtechniquewith avariety the sintering temperature of 300 °C , 400 °C , 450 °C and 550 °C. Optical properties ZnO thin films were characterized by using UV-Vis spectroscopy. The ability ofphotocatalyst of ZnOfordegradation ofmethylene bluecolorwas observedthrough the absorbance test by using UV-Vis to obtain the percentage of color degradation. The results showed that the sintering temperature of ZnO affects the value of energy Gap of ZnO thin film. Higher sintering temperature resulted in higher energy gap. The largest gap energy generated from the ZnO sintering temperature of 450 ˚ Cwith values Eg 3.03 eV. ZnO photocatalyst activity of test results have been able to degrade methylene blue up to 97.62% were obtained from ZnO thin layer of sintering temperature of 450 ˚ C

Analisis Sifat Optik Lapisan Tipis Bilayer Zno/tio2 yang Dideposisikan Menggunakan Metode Sol-gel Spray Coating dan Aplikasinya sebagai Fotodegradasi Zat Warna

ZnO/TiO2 bilayer thin films have been deposited on a glass substrate by using sol-gel method with spin coating technique. The quality of films deposited on buffer layer is found to be superior to those grown directly on a substrate. The ability of photodegradation of ZnO/TiO2 was observed through the dye test by various molarities of ZnO solution. ZnO sol was prepared by dissolving zinc acetate dehydrate into a solvent of isopropanol then add monoethanolamine and stirred for 30 min at 70°C. For preparing TiO2 sol, titanium tetraisopropoxide is first dissolved in a mixture containing isopropanol and ethanol at room temperature. Then after 30 min stirring, the sol was titrated with a mixture of acetic acid, ethanol and deionized water. The process was followed by 60 min at room temperature. ZnO sol as a first layer is first deposited on a glass substrate and then proceed TiO2 sol on it, for the both deposition was heated at 450oC. The optical properties of ZnO/TiO2 bilayer thin films was characterized by using spectrophotometer UV-Vis. The results showed that the molarity of the ZnO sol affects the optical properties of ZnO/TiO2 bilayer thin films. The band gap energy of the ZnO/TiO2 bilayer thin films with different molarity of ZnO sol respectively 0,1 M, 0,3 M, 0,5 M and 0,7 M has been measured about 3,21 eV, 3,27 eV, 3,32 eV and 3,36 eV. The results of the photodegradation test of the ZnO/TiO2 bilayer thin films have been able degrade methylene blue up to 99,85%, methyl orange 50,68% and batik's dye 49,87%

Analisa Pengaruh Grid Rasio Dan Faktor Eksposi Terhadap Gambaran Radiografi Phantom Thorax

Analysis of the influence of the grid has been determined and the ratio of the radiographic expose factor thorax phantom with grid ratio and expose factor variation to analyze the density and contrast on chest radiographs. Research methods using phantom anthoropomorphic, densitometer and X-ray equipments. Irradiation conditions are given with some expose factor variation is 55 kV 16 mAs, 65 kV 8 mAs, 75 kV 3.2 mAs, and a variety of grid ratio 6:1 and 8:1. Research data is processed and made in the form of a graph of the density of the contrast of the grid ratio and expose factor variation. The higher the ratio of the grid will cause a decrease in the density of radiographs, but does not always lead to increasing or decreasing the contrast radiographs. Results overview on to 5 thorax phantom organ that produces the highest optical density in the use of expose factors 65 kV, 8 mAs on both the grid ratio

Sifat Optik Zinc Oxide (Zno) Yang Dideposisi Di Atas Substrat Kaca Menggunakan Metode Chemical Solution Deposition (Csd) Dan Aplikasinya Untuk Degradasi Zat Warna Methylene Blue

In this research, ZnO thin films have been successfully deposited on glass substrates by spray coating technique with a variety of solution concentration 0,3M, 0,5M, 0,75M and 0,9M. Optical properties ZnO thin films were characterized by using UV-Vis spectroscopy. Methylene blue as degradation media was used to estimate the photocatalytic activity from deposition samples ZnO. The research showed that the greater the concentration of the deposition solution in the absorption value increases, the transmittance decreases and getting smaller value of the band gap energy. Assay results photocatalytic activity of ZnO was able to degrade methylene blue to 96.6%

Uji Kesesuaian Ct Number Pada Pesawat Ct Scan Multi Slice Di Unit Radiologi Rumah Sakit Islam YOGYAKARTA Pdhi

CT number is the value of x rays attenuation coefficient determined by the average energy of the x-rays and atomic number absorber and expressed by the attenuation coefficient. function CT number in CT Scan is to assess and differentiate abnormalities in human organs. If there are inaccuracies value of CT number, it can happen misdiagnosis and treatment of patients that successive actions, so the need for periodic compliance of the test.Suitability tests were conducted to value of CT number multislice CT Scan in Radiology Unit of the PDHI Yogyakarta Islamic Hospital. Suitability test were conducted by using a water phantom, 10 mm slice thickness, 140 kV and 280 mAs, gantry tilt of 0 °, round or circular ROI with a size of 2-3 cm. Measurement samples were taken from 5 different regions which the first area in the center of the phantom images, as well as four other regions on the edge of the peripheral or phantom image. From the test have been gotten value of CT number for the water phantom at 5 different positions 2.03 ; 1.38 ; 1.60 ; 1.79 ; 1.83 HU. Five different positions has had no single value that is the result exceeds the tolerance limit of ≤ 4 HU thus all CT values for the number of water which is within the tolerance limit with a value of -4 up to 4 HU, so it could be concluded that the results of the reading CT number on the multislice CT Scan in Radiology Unit of the Islamic Hospital Yogyakarta PDHI still qualifies as recommended regulatory heads BAPETEN Number 9 In 2011 on quality assurance (QA) or quality control (QC) of the CT Scan