Article Per Year (5 Year)
p-Index From 2020 - 2025
1.908
P-Index
This Author published in this journals
All Journal Teknosains: Media Informasi Sains dan Teknologi JOURNAL ONLINE OF PHYSICS KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Jurnal Fisika dan Terapannya Jurnal farmasi UIN Alauddin Makassar
Zelviani, Sri
Universitas Islam Negeri (UIN) Alauddin Makassar
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Health Professions Immunology & microbiology Medicine & Pharmacology Physics Public Health

Published : 24 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 24 Documents
Search

 1   2   3 
STUDI ANALISIS KOEFISIEN ABSORBSI PAPAN AKUSTIK PADA KETEBALAN BERVARIASI BERBAHAN DASAR LIMBAH KULIT JAGUNG DAN SABUT KELAPA (SOLUSI ALTERNATIF RAMAH LINGKUNGAN) Said L, Muh.; Nurmin, Nurmin; Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 7 No 1 (2020): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i1.13484

Abstract

This study aims to detemine the effect of thickness on the absorption coefficient of acoustic boards from corn waste and coconut fiber with polyester resin adhesive. The procedure used is used in the research carried out by making acoustic boards with two types of samples, which are fine chopped materials and materials that have been roughly cut with a thickness of 0.7 cm, 1.0 cm and 1.5 cm and measure the coefficient absorption of the thickness of the acoustic material board. The frequency value used is 200 Hz, 250 Hz, 500Hz, 1000 Hz, 2000 Hz and also 4000 Hz. Based on the results of research conducted, it is found that the absorption coefficient value of straight-line coefficient, where the thicker a material, the smaller the coefficient of absorption. Sound absorption coefficient is good, namely at all thicknesses with a frequency of 200 Hz, 250 Hz and 500 Hz both from fine counts and rough counts. This shows that acoustic boards made of corn husk and coconut fiber can be used as sound absorbers because they have been included in the requirements of the ISO 11654 standard. 
PENGUKURAN LAJU DOSIS PAPARAN RADIASI HAMBUR PADA RUANG COMPUTER TOMOGRAPHY (CT) SCAN DI RUMAH SAKIT BHAYANGKARA MAKASSAR Astuti, Astuti; Sahara, Sahara; Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 5 No 2 (2018): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v5i2.16110

Abstract

This research aims to determine the effect of exposure to radiation dose on the distance from the radiation source, determine radiation dose exposure with variations in exposure factors (voltage), and to determine the radiation exposure received by workers / operators in the CT-Scan room at Bhayangkara Hospital Makassar and using a sensitive Surveymeter with variations in the exposure factor (voltage) of 100 kV, 120 kV, and 135 kV and a variation of the distance from the radiation source of 0 m, 1 m, 2 m. The results showed that the highest dose was on the front side with a voltage of 135 kV at a distance of 0 m, namely 1.5 nSv / h. While the lowest dose is on the left side with a voltage of 100 kV at a distance of 2 m, namely 0.6 nSv / h. Radiation exposure received by workers / operators in the CT-Scan room at Bhayangkara Hospital Makassar at a voltage of 135 kV, a distance of 1 m from the radiation source, namely 1.5 nSv / h. This is in accordance with the provisions of BAPATEN, namely the value of the dose received does not exceed 50 mSv in (one) year.
HUBUNGAN INTENSITAS CAHAYA DAN JARAK PANCARAN SEBAGAI HUKUM KEBALIKAN KUADRAT Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 5 No 1 (2018): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v5i1.15927

Abstract

This research aims to determine the relationship between light intensity and beam distance as the inverse square law. From the experimental results it was found that the relationship between light intensity with the distance of the beam that is the farther the distance of the beam used, the intensity of the light obtained will be smaller, and vice versa. From the results of research conducted, obtained results for an average light intensity of 2.0636 Cd.Keywords: light intensity, beam distance, inverse square law
KUALITAS CITRA PADA DIRECT DIGITAL RADIOGRAPHY DAN COMPUTED RADIOGRAPHY Sri Zelviani
Teknosains Vol 11 No 1 (2017): JANUARI
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v11i1.7583

Abstract

Abstract : The measurement of image quality on Direct Digital Radiography (DR) and Computed Radiography (CR) had been conducted by using baby phantom as the object with abdomen (AP) examining area. The measurement of image quality was analized using ImageJ software i.e. histogram analysis and SNR (Signal to Noise Ratio) calculation. The results indicate that value of SNR analysis on CR is higher than DR for both measurement results. Gray level distribution of histogram analysis on DR wider than CR.
PENGARUH KETEBALAN BAHAN PENGHALANG TERHADAP INTENSITAS RADIASI RELATIF Sri Zelviani
Teknosains Vol 12 No 2 (2018): JULI
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v12i2.7599

Abstract

Pada penelitian ini bertujuan untuk menyelidiki dan mengetahui pengaruh ketebalan bahan penghalang terhadap intensitas radiasi relatif dan menentukan koefisien transmitansi dan absorpbansi bahan penghalang yang digunakan. Dari hasil penelitian yang telah dilakukan, diperoleh bahwa hubungan antara intensitas cahaya dengan jarak pancaran yaitu bahwa semakin jauh jarak dengan sumber cahaya maka kuat penerangannya semakin kecil. Adapun hubungan antara pengaruh ketebalan bahan penghalang terhadap intensitas radiasi relatif yaitu bahwa semakin tebal suatu penghalang maka semakin rendah nilai intensitas penerangan yang diperoleh.
ANALISIS NILAI ABSORBANSI KADAR FLAVONOID TANAMAN HERBAL MENGGUNAKAN SPEKTROFOTOMETER UV-VIS Anita Purnamasari; Sri Zelviani; Sahara Sahara; Nurul Fuadi
Teknosains Vol 16 No 1 (2022): Januari-April
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v16i1.24185

Abstract

Flavonoid merupakan metabolit sekunder dari polifenol yang banyak ditemukan pada tumbuhan dan makanan serta memiliki aktivitas biologis. Kadar flavonoid dapat diukur dengan mengetahui nilai absorbansi pada panjang gelombang tertentu berdasarkan prinsip Lambert-Beer dari setiap tanaman herbal menggunakan spektrofotometer UV-Vis. Tujuan penelitian ini adalah untuk mengetahui kadar flavonoid ekstrak daun sirih merah, daun kembang sepatu dan ekstrak daun kapuk. Proses ekstraksi kandungan kimia dan daun sirih daun waru dan daun kapuk dilakukan dengan metode maserasi menggunakan etanol 70%. Hasil peneltian menunjukkan bahwa kandungan flavonoid total daun sirih merah, daun kembang sepatu dan daun kapuk adalah sebesar 1,18131%, 1,4445% dan 1,2985%. Sehingga dapat disimpulkan bahwa kandungan flavonoid tertinggi dimiliki oleh daun sirih merah dengan nilai sebesar 1,8131%.
PENENTUAN NILAI KALOR JENIS TANAMAN HERBAL JAHE DAN TEMULAWAK SEBAGAI OBAT PENURUN DEMAM DENGAN MENGGUNAKAN METODE COBRA3 Sri Zelviani; Putri Mayangsari; Nurul Fuadi
Jurnal Farmasi UIN Alauddin Makassar Vol 8 No 2 (2020): Jurnal Farmasi Edisi November
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jurfar.v8i2.19294

Abstract

Tanaman herbal seperti tanaman rimpang; jahe dan temulawak sering digunakan dalam kehidupan sehari-hari sebagai obat dalam menurunkan demam. Demam merupakan kondisi suhu tubuh lebih besar dari suhu 37,5oC. Demam adalah bagian dari proses kekebalan tubuh melawan infeksi akibat parasit, virus, dan bakteri. Penelitian penentuan nilai kalor jenis tanaman herbal jahe dan temulawak ini dilakukan dengan menggunakan metode eksperimen temperatur Cobra3 HYPWE. Hasil penelitian pada tanaman herbal jahe diperoleh nilai kalor jenis rata-rata sebesar 51,46 J/groC dan nilai kapasitas kalornya adalah 1.092,2 J/oC; serta temulawak dengan nilai kalor jenis rata-rata 46,17 J/groC dan nilai kapasitas kalornya adalah 923,4 J/oC. Semakin besar nilai kalor jenis yang diperoleh, maka semakin besar pula nilai kapasitas kalor yang terdapat dalam bahan tersebut dan semakin baik pula dalam menurunkan suhu.
Composite of Hemp Fiber and Lead Acetate Epoxy Resin as an Alternative X-Ray Radiation Shielding Material Nurlinda Jusli; Sri Zelviani; Sefrilita Risqi Adikaning Rani; Hernawati Hernawati; Asriani Asriani; Sulaiman Yahirah Muhammad; Dwi Febri Isradati
KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Vol 8 No 01 (2023): KONSTAN (Jurnal Fisika dan Pendidikan Fisika)
Publisher : Universitas Islam Negeri (UIN) Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/konstan.v8i01.252

Abstract

Research on hemp fiber composites with epoxy resin matrix and lead acetate as an alternative material for X-ray radiation shielding has been conducted to determine the optimal composition of radiation shielding samples made from hemp fiber, epoxy resin, and lead acetate. The method used to make composite samples with six different designs, namely using a ratio of 4 gams, eight gams, and 12 gams of hemp fiber to 80 gams and 160 gams of resin. The lead acetate used in each composition is 2.5 gams. This study carried out three measurement processes: density, attenuation, and absorption. Density measurements were carried out by measuring the volume and mass of the sample. In contrast, attenuation and absorption measurements were carried out using a mobile X-ray aircraft with a Piranha multi-X-ray meter detector. In the three measures, the highest value was obtained in composition VI, namely with 12 gams of hemp fiber, 160 gams of epoxy resin, 80 gams of catalyst, and 2.5 gams of lead astate. The density value obtained was 1.120 g/cm3. The sample with this composition can absorb 71.22% (1.24580 cm-1) of radiation at 40 kV, absorb 66.91% (1.10621 cm-1) at 60 kV and 60.22% (0.92191 cm-1) of radiation absorbed at 81 kV voltage. Therefore, it can be concluded that the higher resin and hemp used, the more excellent density value obtained—the geater density of the sample, the geater value of attenuation and absorption.
NILAI TERMOFISIKA DAUN KAPUK, DAUN SIRIH DAN DAUN BUNGA KEMBANG SEPATU SEBAGAI BAHAN KOMPRES DEMAM Sri Zelviani; Riska Riska; Fitriyanti Fitriyanti
JFT : Jurnal Fisika dan Terapannya Vol 7 No 2 (2020): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i2.18064

Abstract

Fever was a condition where the body temperature was above 37,5oC. Fever was also part of the immune process that was fighting infections due to viruses, bacteria and parasites. Fever was considered very high and potentially dangerous if the temperature reaches 39oC. This research used experimental of temperature Cobra3 method. The research showed  thermophysical values of kapok leaves, red betel leaves and hibiscus flower leaves as ingredients for fever compresses. The results of kapok leaves were the average specific heat value of 45.07 (J/groC), and heat capacity value of 901.30 (J/oC). For the sample of red betel leaves, the average specific heat value were 72.50 (J/groC) and heat capacity value 1,540 (J/oC). Sample of hibiscus flower leaves were the average specific heat value 96.30 (J/groC) and the heat capacity value 1,925.3 (J/oC).
PENGARUH TEGANGAN TABUNG (kV) PADA PEMERIKSAAN THORAX TERHADAP KUALITAS CITRA RADIOGRAFI DI BALAI BESAR KESEHATAN PARU MASYARAKAT MAKASSAR Fitriani Fitriani; Sri Zelviani; Sahara Sahara
JFT : Jurnal Fisika dan Terapannya Vol 7 No 2 (2020): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i2.18067

Abstract

This study aims to determine the effect of high voltage usage and standards on the quality of radiographic imagery produced on X-ray aircraft. Data retrieval was obtained by conducting testing in the Radiology Installation room of the Makassar Public Lung Health Center by using an X-ray aircraft of thosiba brand type with drx-1824B model unit. The result obtained is the voltage of the tube gives an influence on the quality of radiography imagery where for the use of standard tube voltage provides good radiographic imagery quality results with a graph reading histogram voltage of 50 kV with a distance of 100 cm and a time of 10 mAs with a black background image starting at the position of 16 to 36 and the position of the object is 37 to 79 which is then able to provide information because the edges of the object and background can still be distinguished clearly and for the high voltage used the result is less tub because it can reduce the contrast value of objects and background is indistinguishable, this is seen in the histogram readings voltage of 90 kV and distance of 100 cm and the time of 10 mAs has a gradation of gray color that dominates compared to the black background whose position starts from 10 to 132 which can not provide information on the edge value between the background and the object phantom water because both seem to be fused so that it is indistinguishable and causes an inadequate image contrast Not good enough.
Co-Authors Abadi, Firdaus Alam Ahriani Ahriani Albar, Ahmad Aminah Aminah Anita Purnamasari Asriani Asriani Ayu, Dya Azyurah, Zilmi Bariah, Khaerul Citra Wardani Desianti, Ika Dwi Febri Isradati Elfrida Ratnawati Elisabeth Supriyatni Fitriani Fitriani Fitriyanti Fitriyanti FITRIYANTI FITRIYANTI Hasan, Hasniati Hernawati Hernawati HERNAWATI HERNAWATI Hidayat, Serli Hatul Ida Ayu Putu Sri Widnyani Ihsan Ihsan Ilham Ilham Imran, Dzulqadri Isradianti, Dwi Febri Jamhari Jamhari jumardin jumardin Lestari, Utari Mahyuddin, Rahmawati Muh. Said L Musriadi, Musriadi Narti Narti, Narti Nur, Fenty Nurlinda Jusli Nurmin Nurmin Nurul Fuadi Nurul Fuadi Nurul Wahidah Putri Mayangsari Rahmaniah, Rahmaniah Rahmayani, Rai Rani, Sefrilita Risqi Adikaning Riska Riska Sahara Sahara Sahara Sahara Sulaiman Yahirah Muhammad Trihendriansyah, Trihendriansyah Wahyuni, Ayusari Yoga Yuniadi