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All Journal Physics Student Journal Majamecha Journal of Computer, Electronic, and Telecommunication (COMPLETE) Petrogas : Journal of Energy and Technology
Fitri Oktafiani
Department of Instrumentation and Electronic, STTMigas Balikpapan
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Mechanical Engineering Physics

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Pengaruh Radiasi Gamma Terhadap Jumlah Leukosit, Prosentase Limfosit pada Organ Limfoid dan Histologi Hepar Mencit (Mus muculus) yang Telah Diberi Ekstrak Meniran (Phyllantus niruri L.) Oktafiani, Fitri; Juswono, Unggul P.; Kusharto, dr.
Physics Student Journal Vol 1, No 1 (2013)
Publisher : Department of Physics - Faculty of Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAKSistem imun merupakan sistem yang sangat penting untuk mempertahankan homoestatis dan kesehatan tubuh. Gangguan pada sistem ini dapat menyebabkan daya tahan tubuh menurun. Penurunan sistem imun akibat paparan radiasi dapat diketahui dengan melihat populasi sel leukosit dan limfosit pada organ limfoidnya. Populasi sel leukosit dan limfosit diamati menggunakan hemocytometer dan flowcytometer, sedangkan paparan radiasi diberikan menggunakan Pesawat Teleterapi Cobalt-60 dengan variasi 5 dosis yaitu 100, 200, 300, 400, dan 500 Rad. Hasil penelitian menunjukkan paparan radiasi 100 sudah dapat menurunkan populasi kedua sel dengan nilai rata-rata sebesar + 20%. Pada pemberian radiasi hingga 500 rad, populasi kedua sel menurun lebih dari 80% dari kontrolnya. Penambahan antioksidan sangat berguna dalam menangkal radikal bebas yang terbentuk dari interaksi radiasi dengan sel. Salah satu tanaman yang diketahui memiliki kandungan antioksidan yang tinggi yaitu Phyllantus niruri L atau meniran. Meniran memiliki senyawa flavanoid yang dapat menangkap radikal bebas melalui proses free radical scanvenging. Berdasarkan hasil penelitian didapatkan bahwa pemberian ekstrak meniran dapat meningkatkan jumlah populasi sel leukosit dan limfosit pada organ limfoid. Pada penelitian ini juga dilakukan pengamatan terhadap sel nekrosis pada histologi hepar mencit. Ekstrak meniran mampu mempertahankan sel hepatosit hingga 23,72%. dari nekrosis akibat paparan radiasi.Kata kunci: Radiasi Gamma, Limfosit, Leukosit, Hepar, Phyllantus niruri L.
PEMROGRAMAN SISTEM KEAMANAN WEB ADMINISTRATOR BERDASARKAN IP PUBLIK BERBASIS IOT (INTERNET OF THINGS) Nurjanah, Nurjanah; Hamsir, Hamsir; Zein, Muhammad Ibnu; Oktafiani, Fitri
PETROGAS: Journal of Energy and Technology Vol 6, No 1 (2024): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v6i1.167

Abstract

This research offers an innovative solution for implementing an IoT (Internet of Things) based web administrator security system. This research uses a wiring design that has been realized, the system can monitor and control access to the administrator dashboard based on the public IP address of the accessor. Using Lolin (WeMos) D1 R1 as a microcontroller and I2C LCD for data display, users can easily manage web access efficiently. Through the Arduino IDE application using the C/C++ programming language, this system can be set up with setup and loop functions, ensuring proper initialization and repeated processing of access requests. The test results of this system successfully demonstrated its ability to detect unauthorized access and block it with a fast response. An unknown IP will be detected on the system and turn on the alarm/buzzer and the public IP will appear on the LCD. Easy access control via tactical buttons works to block unauthorized access. This system also sends notifications via the Telegram application, providing greater convenience and control for users. In its development, this system can be applied and combined with various devices as a control and security system.
MENGGESER TITIK FOKUS LENSA PLASMONIK SPIRAL DENGAN MENGUBAH PANJANG GELOMBANG CAHAYA DATANG Oktafiani, Fitri
PETROGAS: Journal of Energy and Technology Vol 6, No 1 (2024): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v6i1.150

Abstract

Plasmonic structures are metal-based structures characterized by plasmon oscillations in the electron conduction band in response to external radiation. This structure has strong light absorption and light scattering as well as electromagnetic field amplification at short distances (near-field). Based on these advantages, improving the focusing performance of surface plasmonic polariton waves is urgently needed. The sharp focus with strong intensity has been used for various applications, including nanoimaging, nanolithography, and optical tweezers. In this research, we use a spiral plasmonic lens combined with a groove ring and the incident beam has a circular polarization direction (circular polarization). The spiral plasmonic lens functions to generate plasmonic waves, while the groove ring functions to spread plasmonic waves on the surface to the focal point with a certain curve in the z-axis direction (far-field). Parameter optimization is carried out by varying the position of the ring groove. Two waves are used to shift the focus point, namely 1064 nm and 1280 nm. The focal point experiences a range of +500 nm on the z-axis when the waveform is changed. However, the intensity of the focal point at the 1280 nm wave is lower than at the 1064 nm wave. This is in accordance with the theory that when the focal point is further away from the surface structure, the intensity decreases. Shifting the focal point by changing waves can be used in several applications, one example is for manipulating microparticles in two different places.
PENENTUAN REMAINING LIFETIME NET GAS WASH COLUMN BERBASIS LAJU KOROSI INTERNAL DI HYDROCRACKING TREATMENT UNIT PLANT 5 Risna, Risna; Siwi, Riedel Tryxie; Manik, Nijusiho; Oktafiani, Fitri
PETROGAS: Journal of Energy and Technology Vol 6, No 1 (2024): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v6i1.166

Abstract

Corrosion on the internal equipment of the Net Gas Wash Column is the thinning of the material which, if prevention or control is not carried out, will cause damage or leaks to the equipment. Internal corrosion of equipment such as Net gas wash columns is a common problem in industries that use chemical processes or gas processing. Corrosion occurs when metal materials react with the surrounding environment, such as gases involved in the process, moisture, or other chemicals. Several factors that can cause internal corrosion of equipment such as the Net Gas Wash Column include environmental conditions, material properties, temperature and pressure and the presence of water or humidity. This research aims to determine the corrosion conditions that occur, the impact of corrosion rate, thickness thinning, and the relationship between corrosion rate and remaining lifetime. This research uses a non-destructive testing method, namely the Ultrasonic Test. The results of the analysis and calculations were obtained for the corrosion rate that occurred on the Net Gas Wash Column tool, namely shell 0.11 mm/year and head 0.3 mm/year which was caused by temperature and working flow rate. The direct impact of corrosion is equipment damage and the indirect impact is the costs incurred to replace the equipment. The remaining lifetime for the shell and head is 69 years and 40 years. When the remaining lifetime decreases, the depletion caused by the H2S compound and the corrosion rate will increase immediately. From the results of this research, the relationship between the causes, impacts and corrosion rates on the remaining lifetime of the Net Gas Wash Column equipment can be identified and analyzed.
Design of Micro Wind Power Plant using Dual Savonius Turbines Saputra, Riza Hadi; Risna, Risna; Oktafiani, Fitri; Sampurno, Yusuf Cahyo; Ardito, Jheskia
Journal of Computer, Electronic, and Telecommunication (COMPLETE) Vol. 5 No. 2 (2024): December
Publisher : Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52435/complete.v5i2.623

Abstract

Wind power plants are one of the renewable energy solutions that are environmentally friendly and sustainable. The success of such plants heavily depends on the location, which plays a crucial role in determining the availability of wind. In addition to highlands, coastal areas can serve as suitable locations. Balikpapan, with its expansive coastlines, holds significant potential for harnessing wind energy as a source of electricity. However, the utilization of this wind energy, particularly on a micro-scale, remains suboptimal. Research conducted over three days recorded wind speeds between 4 m/s and 5 m/s, generating voltages between 3 volts and 4 volts, which is only 1/3 of the total potential voltage. There is still an untapped potential of about 2/3 or 6 volts that could be harnessed if wind speeds reach 12 m/s to 15 m/s. The study concludes that the wind speed at Airport Beach is not yet sufficient to produce the maximum possible voltage. The current wind speeds are only capable of powering a 5-volt capacity light, with the generated energy stored in a battery for later use.
Analisis Penentuan Nilai Cation Exchange Capacity (CEC) Berdasarkan Hasil Methylene Blue Test (MBT) di Trayek 12¼ Manik, Nijusiho; Paindan, Esterina Natalia; Pratama, Gusti Arya; Sahara, Ain; Oktafiani, Fitri
Majamecha Vol. 6 No. 1 (2024): Majamecha
Publisher : Program Studi Teknik Mesin, Fakultas Teknik, Universitas Islam Majapahit, Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamecha.v6i1.3287

Abstract

Lumpur merupakan salah satu faktor sangat penting dalam menunjang suksesnya operasi pemboran pada sumur minyak. Perencanaan penggunaan lumpur pemboran bertujuan memperoleh hasil yang lebih maksimal dalam pengangkatan cutting dan perawatan sumur pemboran. Penelitian ini bertujuan untuk mengetahui kereaktifan cutting dengan mengidentifikasi kadar clay dan mengetahui komposisi lumpur yang sesuai dengan trayek 12¼. Metode pengujian ini dilakukan dilaboratorium STT Migas dengan beberapa pengujian yaitu yield point (YP), plastic viscosity (PV), gel strength Methylene Blue Test (MBT), dan Cation Exchange Capacity (CEC). Hasil pengujian PV pada original mud didapatkan sebesar 17 cps, dan saat dilakukan pengujian dengan contamination clay didapatkan hasil sebesar 20 cps. Pada YP diperoleh hasil original mud yaitu sebesar 32 lbs/100ft dan dari pengujian yang menggunakan contamination diperoleh hasil sebesar 35 lbs/100ft2. Dari penggunaan gel strength selama 10 detik diperoleh hasil original mud sebesar 9 lbs/100ft2, dan saat dilakukan pengujian dengan contamination clay diperoleh hasil yang sama yaitu 9 lbs/100ft2. Untuk penggunaan gel strength selama 10 menit dari hasil original mud diperoleh 13 lbs/100ft2, dan setelah pengujian dengan contamination clay didapatkan 14 lbs/100ft2. Pada hasil rheology sampel cutting yang diuji menunjukkan bahwa Xanthun Gum mempengaruhi kekentalan sistem lumpur KCL-Polimer. Dari hasil MBT 3 meq dan CEC 15 meq/100gr dapat dipastikan tidak terjadi swelling karena sampel cutting tersebut tergolong tidak reaktif.
RANCANG BANGUN ALAT UJI EMISI PORTABLE KENDARAAN MOTOR BERBASIS ARDUINO UNO DAN ESP-01 DENGAN INTERPRETASI THINGSPEAK Septiawan, Bima; Oktafiani, Fitri; Nurjanah, Nurjanah; Sahara, Ain; Darmiyati, Iin; Maulana, Ranjiv; Hamsir, Hamsir
PETROGAS: Journal of Energy and Technology Vol 7, No 1 (2025): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v7i1.184

Abstract

Polusi udara merupakan masalah yang sangat penting untuk diperhatikan karena berkaitan tentang kesehatan manusia. Polusi udara di Balikpapan meningkat salah satunya karena penggunaan bahan bakar kendaraan bermotor yang melonjak akibat pertumbuhan lalu lintas. Berdasarkan hal ini dilakukan penelitian mengenai rancang bangun alat uji emisi kendaraan yang portable dan efisien, menggunakan teknologi sensor canggih dengan mikrokontroler Arduino Uno dan ESP-01 sebagaimodul Wi-Fi untuk mengirim data sensor ke ThingSpeak. Hasil penelitian menunjukkan bahwa alat stabil dan efisien dalam pengukuran. Dengan rata-rata nilai CO, HC, NOx, CO2, dan O2 yaitu 0.61%, 723.71 ppm, 1.84 ppm, 0.92% dan 0.18% serta ketidakpastian pengukuran yaitu 0.01%, 12.70 ppm, 0.07 ppm, 0.09% dan 0.08%. Pengukuran emisi kendaraan motor pada rentang tiga tahun yang berbeda, yaitu dibawah 2010, 2010 – 2016, dan diatas 2016. Didapatkan hasil kendaraan yang lebih tua cenderung memiliki emisi gas buang yang lebih tinggi, hal ini dikarenakan pembakaran yang kurang efisien serta perawatan yang tidak optimal. 
Analisis Pengaruh Reaktor Flotasi Udara Terlarut Terhadap Limbah Cair Kilang Unit Pertamina Risna, Risna; Oktafiani, Fitri
Majamecha Vol. 7 No. 1 (2025): Majamecha
Publisher : Program Studi Teknik Mesin, Fakultas Teknik, Universitas Islam Majapahit, Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamecha.v7i1.3862

Abstract

Pencemaran lingkungan oleh limbah dapat terjadi pada proses dan hasil pengolahan minyak. Pengolahan air limbah wajib dilakukan agar kandungan air limbah yang akan dibuang ke laut tidak mencemari lingkungan. Tujuan dari penelitian ini untuk mengurangi volume, konsentrasi atau bahaya yang ditimbulkan oleh limbah sehingga dapat memenuhi baku mutu lingkungan yang dipersyaratkan. Untuk mengatasi permasalahan tersebut maka metode pengolahan air limbah cair dari pengolahan minyak bumi dapat dilakukan dengan menggunakan pengolahan secara fisika yakni reactor flotasi udara terlarut (Dissolved Air Flotation atau DAF). Hasil analisis data memberikan gambaran komprehensif tentang pengaruh DAF dalam mengurangi konsentrasi Total Suspended Solids (TSS) dalam air limbah industri kilang dan penggunaan chemical di koagulan, yakni pencapaian parameter pH, COD, Ammonia, Minyak dan lemak sulfida, masih memenuhi target dari Pengolahan limbah EWTP sebesar 95% dan memenuhi baku mutu sesuai dengan PerMen LH No.20 Tahun 2020.
Co-Authors Ardito, Jheskia Darmiyati, Iin dr. Kusharto Hamsir Hamsir Manik, Nijusiho Maulana, Ranjiv N. Nurjanah Paindan, Esterina Natalia Pratama, Gusti Arya Risna Risna, Risna Sahara, Ain Sampurno, Yusuf Cahyo Saputra, Riza Hadi Septiawan, Bima Siwi, Riedel Tryxie Unggul P. Juswono Zein, Muhammad Ibnu