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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Energi Dan Manufaktur Bumi Lestari Jurnal Sains Materi Indonesia Journal of Engineering and Technological Sciences Telaah Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) BULETIN FISIKA Jurnal Penelitian Pendidikan IPA (JPPIPA) Kappa Journal CERATA
Hery Suyanto
Program Studi Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Udayana
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Other

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Identifikasi Bilangan Gelombang Daun Sirih (Piper sp.) Menggunakan Metode Spektroskopi Fourier Transform Infrared (FTIR) dan Principal Component Analysis (PCA) Ayu Anisa Damayanti; Ni Luh Putu Trisnawati; Hery Suyanto
BULETIN FISIKA Vol 22 No 2 (2021): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2021.v22.i02.p02

Abstract

Research has been carried out on the identification of betel leaf (Piper sp.) wavenumbers using Fourier transform infrared (FTIR) spectroscopy and Principal Component Analysis (PCA) methods. The kinds of betel leaf used are red betel (Piper Crocatum), green betel (Piper Betle L.), and black betel (Piper Betle V.). Tests were carried out on betel leaf powder with a betel mass ratio of 4:1 KBr, 0.011528 g and 0.002882 g, respectively. The results of characterization by FTIR showed the presence of functional groups C-H, C = O, C = N, C = C, C-N, C-O, and C-Cl on red, green, and black betel leaves. The results of the PCA analysis provide the value of the wave number which is the identity of betel in the range 1670-1679 cm-1 and strengthened by the results of the K-Nearest Neighborhood (KNN) analysis.
Analisis Hasil FTIR Dari Buah Kedondong dan Labu, Ubi Jalar dan Wortel Sebagai Bahan Alternatif Dye Sensitized Solar Cell (DSSC) Dengan Metode Multivariat Engelia Rambu Maramba Meha; Windarjoto Windarjoto; Hery Suyanto
BULETIN FISIKA Vol 23 No 2 (2022): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2022.v23.i02.p02

Abstract

Research has been carried out on the analysis of various kinds of fruit as an alternative material for Dye Sensitized Solar Cells (DSSC) using Fourier-Transform Infrared Spectroscopy (FTIR) with the Multivariate method. This study used 6 fruits as samples with 2 fruits as validators (mangosteen and dragon fruits) and 4 other fruits as an alternative fruit (Kedondong fruit, sweet potato, pumpkin and carrot). The sample was made into powder and then was analyzed by FTIR. The FTIR spectra data were processed by the Multivariate method, especially the PCA and Clustering algorithm. The results show that both sweet potato and Kedondong fruit can be used as alternative materials for Dye Sensitized Solar Cell (DSSC) whose characteristics are closer to Dragon fruit.
Pengukuran Temperatur Plasma Laser-Induced Breakdown Spectroscopy Dengan Persamaan Boltzmann Dari Emisi Dua Garis Atom Netral Cu Vincent Milano; Suyanto Hery; Ida Bagus Ketut Yoga
BULETIN FISIKA Vol 25 No 1 (2024): BULETIN FISIKA February Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2024.V25.i01.p09

Abstract

Research have been conducted about calculating the plasma temperature using Laser-Induced Breakdown Spectroscopy (LIBS), located in Udayana University’s Laboratorium Penelitian Terpadu FMIPA. The calculation of Plasma Temperature is done using the Boltzmann Equation using the emission intensity and area under the curve of two wavelength from Cu neutral atom Cu I 521.82 nm and Cu I 510.55 nm. The intensity of Neutral Cu atom is obtained from focusing the Nd:YAG laser (1064 nm, 7 ns) with 80 mJ energy to the surface of Bras 6s (or 99.99%) slab in the air with 1 atm pressure and Helium gas with 60 mL/s flowrate, which will generate a plasma. The Photon emission from Cu neutral atoms in plasma will be caught by spectrometer HR 2500+ (14.336 CCD pixel, 200-800 nm). The average plasma temperature by delay time detection using intensity and area ratio is (8976.40±160.34) K and (13119.20±435.23) K respectively. In Helium gas, the temperature is (12261.21±419.06) K using intensity ratio and (16882.41±678.18) K using Area ratio.
Determination of the Optical Band gap Energy from the Extraction and Evaporation of Anthocyanin Compound Sea Lettuce (Ulva Lactuca L.) Using Tauc Plot Method Fiar Tri Santika; Hery Suyanto; Ni Luh Putu Trisnawati; I Putu Tedy Indrayana
BULETIN FISIKA Vol 25 No 1 (2024): BULETIN FISIKA February Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2024.V25.i01.p02

Abstract

The optical energy gap of anthocyanin compounds from sea lettuce extract (Ulva lactuca L.) has been calculated using the Tauc plot method. Sea lettuce plants taken at Sanur Beach Bali. The sea lettuce was dried then mashed and extracted for 24 hours, the last being macerated through three cycles. The extraction results are then evaporated to obtain a thick extract solution. Extracted and evaporated-extraction samples were characterized by UV-Vis in the wavelength range of 200-800 nm. From the characterization results, it was found that the absorption of anthocyanin compounds for the extracted samples was at a wavelength of 268 and 412 nm. Meanwhile, for the extraction-evaporation sample, the absorption is at a wavelength of 286.5 and 408 nm. By using the Tauc plot method, the optical energy gap values ??for the extracted and extraction-evaporated samples were 2.69 and 2.54 eV, respectively. Therefore, anthocyanin compounds from both extracted and evaporation-extracted samples qualify as dye sensitized solar cells (DSSC) for TiO2 semiconductors.
Analisis Dosis Keluaran Berkas Sinar-X Pesawat Linac Varian Clinac CX Berdasarkan Protokol Dosimetri IAEA TRS 398 Komang Sugiarta; Ni Nyoman Ratini; Hery Suyanto; Syarifuddin Syarifuddin
Kappa Journal Vol 6 No 2 (2022): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v6i2.6327

Abstract

Research has been conducted on the Analysis of the X-ray beam output of the Linac varian Clinac CX based on the TRS 398 IAEA. This analysis aims to determine the condition of Linac in Bali Mandara Hospital with reference to the value of 1 cGy equal to 1 MU obtained from the analysis of the ionization chamber, temperature, pressure, polarity effect and ion recombination. The research was conducted with variations of X-ray energy 6 MV and 10 MV. The size of the irradiation field used is (10 x 10) cm with a Source to Surface Distance (SSD) of 100 cm. Based on the results of absolute measurements of the output dose of the Linac Varian Clinac CX X-ray beam at the Radiation Oncology Sub-Installation of the Bali Mandara Hospital with two variations of energy used, the output dose value at 6 MV energy is 1,00138 ???/?? and at 10 MV energy 0,99456 ???/?? with a large deviation of 0,138 % and 0,544 %, respectively, with the obtained deviation meeting the TRS 398 IAEA tolerance limit of ± 3%.
Penyesuaian Nilai Percepatan Tanah Maksimum Berdasarkan Modifikasi Konstanta Atenuasi dengan Data Accelerograph Tahun 2020-2023 Wilayah Bali Mayumi Cahyandari; Winardi Tjahyo Baskoro; I Putu Dedy Pratama; I Made Yuliara; Hery Suyanto; I Gde Antha Kasmawan
BULETIN FISIKA Vol 25 No 2 (2024): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2024.v25.i02.p12

Abstract

This study aims to determine the empirical formula model of maximum ground acceleration (PGA) in the Bali region by modifying the attenuation constant based on accelerograph data from 2020-2023 obtained from the BMKG Class II Sanglah Geophysical Station. The data used consists of 443 accelerograph recordings from 146 earthquake events, with a coverage area of ??113.51 ° - 115.83 ° E and 12.56 ° - 7.71 ° S. Through linear regression analysis, the empirical PGA model for the Bali region is obtained: log10 PGA = (-1.817) log10 (R) + (0.809) M - 0.089. This model is also compared with the attenuation model from Donovan, Setiawan, and Lin and Wu, with the results showing that the developed model has a very strong correlation of 0.782 between the PGA from observations and the PGA from the model which is included in the very strong category. In addition, the MSE value of 0.209 and RMSE of 0.457 from this model indicate that the model has a good level of accuracy in predicting PGA values. These findings provide a significant contribution in improving seismic risk prediction in the Bali region, which can be used as a basis for more effective disaster mitigation planning.
The Effect of Focus Film Distance Variation on Patient Absorbed Dose in Thorax Examination with Roentgen Machine in Radiology Installation of Sanjiwani Hospital Gianyar I Nyoman Yosua; Gusti Ngurah Sutapa; I Ketut Putra; Ida Bagus Suryatika; Hery Suyanto; Ida Bagus Alit Paramarta
Kappa Journal Vol 8 No 3 (2024): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i3.28113

Abstract

A study has been conducted on the effect of Focus Film Distance (FFD) variation on patient absorbed dose during thorax examination at the Radiology Installation of Sanjiwani Hospital, Gianyar. This study aims to determine the effect of FFD variation and the suitability of the radiation dose received by patients whether it is still within the limits of BAPETEN's decision. The X-ray machine used was Siemens Luminos Fusion Roentgen with the FFD variation method given a distance of 110 cm, 130 cm, and 150 cm in 30 patients. Dose measurements were carried out based on radiation exposure and analyzed according to BAPETEN standards. The results showed that the greater the FFD value, the smaller the absorbed dose received by patients. The highest absorbed dose obtained for FFD 110 cm was 0.3867 mGy, 130 cm was 0.2769 mGy, and 150 cm was 0.2079 mGy below the maximum limit of 0.4 mGy set by BAPETEN, so it is safe for patients. Statistical analysis of one-way t-test showed significant results, with thitung < ttabel. This indicates that FFD variation affects the absorbed dose, and all doses remain within safe limits. Thus, thorax examination at RSUD Sanjiwani Gianyar has met the established safety standards.
Determination of Diagnostic Reference Level (DRL) in Non-Contrast and Contrast Thorax CT Scan Examinations at Bali Mandara Regional Hospital Pramitha, Ni Luh Emy; Sutapa, Gusti Ngurah; Trisnawati, Ni Luh Putu; Ratini, Ni Nyoman; Suyanto, Hery; Baskoro, Winardi Tjahyo
Jurnal Penelitian Pendidikan IPA Vol 11 No 7 (2025): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i7.10344

Abstract

A study has been conducted to determine the Diagnostic Reference Level (DRL) in non-contrast and contrast chest CT scan examinations at Bali Mandara Hospital. The study was conducted at the Radiology Installation of Bali Mandara Hospital using dose reports from non-contrast and contrast chest CT Scan examinations with data obtained including age, gender, kV, mAs, slice thick, time rotation, Pitch, as patient information and protocols used in the examination and dose information in the form of CTDIvol and DLP. This study aims to determine the local DRL value against the national DRL value. The method used to determine the DRL value in this study is by collecting data in the form of recording and documenting the dose report of CT Scan examination patients, with the data for each examination being as many as 30. From the recorded data, the CTDIvol and DLP values are used to find the DRL value by sorting it from the smallest to the largest value and then calculating the 3rd quartile as a determinant of the local DRL. The interpolation method is also used to consider the position of the 3rd quartile so that it is at a decimal value. From the research results, the CTDIvol value for non-contrast thorax examination was 6.43 mGy, and the DLP value was 293.08 mGy.cm. Meanwhile, in contrast to the thorax examination, the CTDIvol value was 6.14 mGy, and the DLP value was 852.57 mGy.cm. Furthermore, a statistical analysis was carried out in the form of a one-way t-test using SPSS software, which was used to compare the DRL values of both CTDIvol and DLP non-contrast and contrast thorax examinations with the standard values set by BAPETEN 2021 as a reference used in Indonesia. Based on the results of the analysis with a one-way t-test, it can be seen that the DRL values for non-contrast thorax examinations (DRL CTDIvol and DLP) and contrast examinations (DRL CTDIvol) do not exceed the standards set by BAPETEN. However, in the contrast thorax CT Scan examination, the DRL DLP value exceeded the standard value set by BAPETEN, so dose optimization was needed by re-evaluating the protocol implemented at Bali Mandara Hospital.
Analisis Kualitatif Perbandingan Profil Unsur Tablet Parasetamol Generik Menggunakan Laser-Induced Breakdown Spectroscopy (LIBS) Mulan Gevika Amara Putri; Ni Ketut Anggun Damayanti; Ni Komang Tria Pradnyani Dewi; Hery Suyanto; Tambunan Matthew Valentino
CERATA Jurnal Ilmu Farmasi Vol 16 No 2 (2025): Cerata Jurnal Ilmu Farmasi
Publisher : Universitas Muhammadiyah Klaten

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61902/cerata.v16i2.1777

Abstract

Parasetamol merupakan obat analgesik-antipiretik yang banyak digunakan dalam bentuk tablet generik dengan variasi eksipien antar merek. Perbedaan ini dapat memengaruhi profil kandungan unsur penyusun tablet, seperti unsur logam kalsium (Ca) dan magnesium (Mg) yang penting untuk kontrol mutu farmasi. Penelitian ini bertujuan mengembangkan metode Laser-Induced Breakdown Spectroscopy (LIBS) untuk mendeteksi variasi unsur penyusun tablet parasetamol generik. Optimasi parameter LIBS dilakukan pada energi laser (100, 130, 150 mJ) dan delay time detection (0,1; 0,5; 1,0 µs) menggunakan sinyal unsur C, H, O, dan N sebagai acuan. Energi 150 mJ dan delay time detection 0,1 µs menghasilkan intensitas sinyal tertinggi dan dipilih sebagai kondisi optimum. Spektrum sampel standar menunjukkan puncak emisi intens untuk unsur H, N, dan O dengan unsur C terdeteksi sebagai puncak minor. Lima tablet parasetamol menunjukkan variasi profil spektral, terutama pada unsur Ca dan Mg. Tablet D memiliki intensitas puncak Ca dan Mg tertinggi, sedangkan tablet A tidak menunjukkan sinyal yang jelas pada kedua unsur tersebut. LIBS terbukti mampu mendeteksi variasi unsur antar merek tablet parasetamol secara cepat dan non-destruktif, serta berpotensi digunakan sebagai metode skrining awal dalam pengawasan mutu sediaan farmasi berbasis komposisi unsur.
Co-Authors Aji Priyo Utomo Ayu Anisa Damayanti Baskoro, Winardi Tjahyo Dewi Handayani Engelia Rambu Maramba Meha Fiar Tri Santika Gusti Ngurah Sutapa I G. A. Widagda I Gde Antha Kasmawan I Gede Hendrawan I Gusti Agung Ayu Ratnawati I Gusti Bagus Wijaya Kusuma I Ketut Putra I Made Yuliara I Nengah Artawan I Nyoman Yosua I Putu Dedy Pratama I Putu Tedy Indrayana Ida Ayu Gede Kusuma Dewi Ida Bagus Alit Paramarta Ida Bagus Alit Paramarta Ida Bagus Ketut Yoga Ida Bagus Suryatika Irdhawati Irdhawati K. Suastika Kiichiro Kagawa Kiichiro Kagawa Komang Sugiarta Koo Hendrik Kurniawan Koo Hendrik Kurniawan Made Sumadiyasa Manuntun Manurung Maria Margaretha Suliyanti Maria Margaretha Suliyanti Marincan Pardede Mayumi Cahyandari Mohamad Infrawan Yulianto Ichwan Mohamad Infrawan Yulianto Ichwan Mulan Gevika Amara Putri Ni Ketut Anggun Damayanti Ni Ketut Esati Ni Komang Tria Pradnyani Dewi Ni Luh Putu Mustia Sridewi Ni Luh Putu Trisnawati Ni Nyoman Rupiasih Ni Nyoman, Ratini Ni Wayan Sariasih Nyoman Wendri Pramitha, Ni Luh Emy Putu Edi Yastika Putu Ekayani Sri Tussniari R.A Restia Pranagari Rinda Hedwig Rinda Hedwig Shinta Shaleha Juwita Sinaga Natalia Declarossy Siti Raudatul Jannah Syarifuddin Syarifuddin Tambunan Matthew Valentino Tjung Jie Lie Tjung Jie Lie Trisnawati, Ni Luh Putu Vincent Milano Wayan Gede Suharta Winardi Tjahyo Baskoro Windarjoto Windarjoto Windarjoto Windarjoto Wulansari Efrilinda Diah