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All Journal Jurnal MIPA JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI
Tongkukut, Seni Herlina Juita
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Biochemistry, Genetics & Molecular Biology Chemistry Education Mathematics Physics

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Investigasi Patahan Manado di Pesisir Teluk Manado Sebagai Upaya Mitigasi Bencana Alam As'ari, As'ari; Tongkukut, Seni Herlina Juita; Panjaitan, Sarmaria; Akasi, Iftita Anugraini; Pulu, Meidy Rosalie
Jurnal MIPA Vol 10, No 1 (2021)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jmuo.10.1.2021.31483

Abstract

Daerah sumber gempa bumi biasanya terdapat pada patahan-patahan yang aktif dan daerah batas lempeng. Data sumber gempa dibutuhkan sebagai bahan evaluasi potensi bencana alam gempa bumi. Sulawesi Utara merupakan daerah yang mempunyai posisi dekat dengan pertemuan tiga lempeng, yaitu Lempeng Pasifik, Lempeng Eurasia dan Lempeng Indo Australia. Patahan Manado merupakan satu patahan yang terdapat di Sulawesi Utara melewati Kota Manado. Keberadaan patahan di pesisir Kota Manado memerlukan identifikasi lebih lanjut menggunakan survei geofisika bawah permukaan. Penelitian bertujuan mengidentifikasi parameter fisis patahan di Pesisir pantai Kota Manado. Eksplorasi dilakukan menggunakan metode geolistrik tahanan jenis konfigurasi dipol-dipol. Data diolah dengan menggunakan perangkat lunak Res2dinv, dan dihasilkan tampang lintang resistivitas 2 dimensi bawah permukaan bumi. Pada lintasan 1 yang terletak di reklamasi pantai, Patahan Manado diidentifikasi sebagai rekahan dengan nilai resistivitas ρ ≤ 20 Ωm, lebar patahan 10-60 m dan kedalaman sampai 20 m. Pada lintasan 2 yang terletak di daratan rekahan dengan nilai resistivitas ≤ 128 Ωm, lebar patahan 10-40 m dan kedalaman sampai 20 m. Rekahan pada lintasan 1 terisi material yang mengandung air laut, sedang rekahan pada lintasan 2 terisi material yang mengandung air tawar. Akuifer air tawar di daratan pesisir pada jalur patahan tidak terintrusi oleh air lautThe source areas for earthquakes are usually at active faults and plate boundary areas. Earthquake source data are needed as material for evaluate the potentiation of earthquake natural disaster. North Sulawesi is an area that has a position close to the meeting point of three plates, namely the Pacific Plate, Eurasian Plate and the Indo-Australian Plate. The Manado Fault is a fault located in North Sulawesi through the city of Manado. The existence of the fault on the coast of Manado City requires further identification using subsurface geophysical surveys. This study aims to identify the physical parameters of the fault on the coast of Manado City. Exploration is carried out using the geoelectric resistivity method of dipole-dipole configuration. The data is processed using Res2dinv software, and the result is a 2-dimensional resistivity cross section of the earth subsurface. On line 1 which is located at beach reclamation, the Manado Fault is identified as a fracture with a resistivity value of ρ ≤ 20 Ωm, a fault width of 10-60 m and a depth of up to 20 m. On line 2 which is located on the fracture land with a resistivity value ρ ≤ 128 Ωm, the fault width is 10-40 m and a depth of up to 20 m. The fracture on track 1 is filled with material containing sea water, while the fracture on line 2 is filled with material containing fresh water. Freshwater aquifers in coastal land on the fault line are not intruded by sea water
Pembuatan dan Karakterisasi Bioplastik Berbahan Dasar Biomassa dengan Plasticizer Gliserol Maneking, Engellita; Sangian, Hanny Frans; Tongkukut, Seni Herlina Juita
Jurnal MIPA Vol 9, No 1 (2020)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jmuo.9.1.2020.27420

Abstract

Penelitian ini bertujuan untuk membuat dan mengkarakterisasi bioplastik yang memanfaatkan biomassa singkong. Pembuatan bioplastik dilakukan dengan dua variasi campuran yaitu pati singkong sebagai bahan dasar, gliserol + air sebagai plasticizer, asam asetat (cuka) sebagai katalis dan variasi kedua dengan kombinasi yang sama dengan penambahan alkohol sebagai pembanding. Karakterisasi bioplastik meliputi pengamatan permukaan menggunakan SEM; kristalinitas menggunakan XRD; penentuan gugus fungsi menggunakan FTIR; serta menganalisis sifat termal menggunakan TGA dan DSC. Hasil karakterisasi menunjukkan bahwa bioplastik dengan kombinasi pati singkong+ gliserol + air + asam asetat (cuka) + alkohol mempunyai tingkat degradasi yang tinggi. Hal ini sesuai dengan analisis XRD dimana kombinasi ini memiliki nilai kristalinitas rendah. Hasil spektra IR menunjukkan adanya gugus C-H Alkana, C=O ester, dan C-H Alkena. Sementara hasil SEM memperlihatkan permukaan yang rata dan hasil analisis TGA/DSC yang memperlihatkan pengurangan massa sebesar 2,3234 mgThis study aims to create and characterize bioplastics that utilize cassava biomass. The making of bioplastics is carried out for two variations of mixture, namely cassava starch as the material-based, glycerol + water as plasticizer, acetic acid (vinegar) as a catalyst and the second variation with the same combination with the addition of alcohol as a comparison. Characterization of bioplastics includes surface observations using SEM; crystallinity using XRD; determination of functional groups using FTIR; and analyzing of thermal properties using TGA and DSC. The characterization results show that bioplastics with a combination of cassava starch + glycerol + water + acetic acid (vinegar) + alcohol have a high degree of degradation. This is in accordance with the XRD analysis where this combination has a low crystallinity value. IR spectra showed that the presence of C-H Alkana groups, C = O esters, and C-H alkenes. While the SEM results showed a flat surface and the results of the TGA / DSC analysis which showed a mass reduction of 2.3234 mg.This study aims to create and characterize bioplastics that utilize cassava biomass. The making of bioplastics is carried out for two variations of mixture, namely cassava starch as the material-based, glycerol + water as plasticizer, acetic acid (vinegar) as a catalyst and the second variation with the same combination with the addition of alcohol as a comparison. Characterization of bioplastics includes surface observations using SEM; crystallinity using XRD; determination of functional groups using FTIR; and analyzing of thermal properties using TGA and DSC. The characterization results show that bioplastics with a combination of cassava starch + glycerol + water + acetic acid (vinegar) + alcohol have a high degree of degradation. This is in accordance with the XRD analysis where this combination has a low crystallinity value. IR spectra showed that the presence of C-H Alkana groups, C = O esters, and C-H alkenes. While the SEM results showed a flat surface and the results of the TGA / DSC analysis which showed a mass reduction of 2.3234 mg.
Pemodelan Perambatan Gelombang Tsunami di Laut Banda Berdasarkan Skenario Gempa 8.0 dan 9.0 Mw Wuwungan, Cynthia; Pasau, Guntur; Tongkukut, Seni Herlina Juita
Jurnal MIPA Vol 10, No 2 (2021)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jmuo.10.2.2021.34006

Abstract

Penelitian ini dilakukan untuk menentukan waktu tiba perambatan gelombang dan tinggi gelombang tsunami di Kota Ambon dan sekitarnya dengan melakukan simulasi tsunami menggunakan software ComMIT. Simulasi dijalankan menggunakan skenario yang mengasumsikan kekuatan gempa 8.0 Mw dan 9.0 Mw. Titik koordinat gempa 4.31˚ LU dan 128.61˚ BT. 10 detektor dalam bentuk virtual (tide gauge) dibuat untuk mendapatkan nilai waktu tiba dan tinggi gelombang tsunami. Hasilnya menunjukkan bahwa tsunami tercepat dengan ketinggian 2.17 m tiba pada detik ke-566 dengan mengasumsikan gempa 8.0 Mw dan gempa 9.0 Mw membuat gelombang tsunami dengan tinggi 62.4 m dan tiba pada detik ke-599 di Kota AmbonThe purpose of this research is to determine the arrival time and the height of the tsunami waves in Ambon and its surroundings by conducting a tsunami simulation using ComMIT. The simulation is run using scenario by assuming the earthquake with magnitude 8.0 Mw and 9.0 Mw. The Earthquake epicenter scenario  44.31˚ N and 128.61˚ E. 10 detectors in virtual form (tide gauge) were placed to determine the arrival time and height of the tsunami waves. The results showed that the fastest tsunami with a height of 2.17 m arrived in 566 seconds after the 8.0 Mw earthquake, and the 9.0 Mw earthquake generate a 62.4 m tsunami with 599 second arrival time in Ambon
Hidrologi Bawah Permukaan Tanah: Studi kasus di Lokasi Pra TPA Kawasan Ilo Ilo Kecamatan Wori Kabupaten Minahasa Utara Viola, Thevitha Refiani; As'ari, As'ari; Tongkukut, Seni Herlina Juita; Tamod, Zetly Estefanus; Tatuwo, Deny Ramon; Hartaty, Lynda; Mukuan, Eva Mukuan Mariayani Rita; Abjul, Delfy Boobu; Malinggas, Christin
Jurnal MIPA Vol 9, No 2 (2020)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jmuo.9.2.2020.28231

Abstract

Sistem hidrologi suatu daerah dipengaruhi oleh bentuk topografi permukaan yang merupakan daerah tangkapan air hujan. Air hujan yang mengalami infiltrasi ke dalam tanah menjadi aliran air tanah yang mempunyai pola hidrologi tertentu. Pemetaan hidrologi air tanah bawah permukaan telah dilakukan di Kawasan Ilo-Ilo desa Wori menggunakan metode geolistrik resistivitas konfigurasi wenner Alpha. Pengukuran dilakukan pada 4 lintasan dengan spasi elektroda 10 m, 48 elektroda dan panjang setiap lintasan 480 m. Daerah penelitian terbagi menjadi 2 pola sistem hidrologi yang terpisah yaitu hasil penelitian menunjukkan bahwa lintasan 3 merupakan area yang mempunyai akuifer paling besar dan permukaannya merupakan daerah tangkapan air. Air tanah cenderung mengalir ke arah lintasan 3, karena kondisi akuifer yang lebih dalam (> 60 m) pada kedua sistem hidrologiThe hydrological system of an area is affected by the shape of the surface topography which is a rainwater catchment area. Rainwater infiltrated into the soil becomes a groundwater flow that has a certain hydrological pattern. The mapping of subsurface hydrological groundwater in the Ilo-Ilo area of Wori village using the Wenner Alpha configuration of resistivity geoelecrical methods has been done. Measurements was made on 4 path with 10 m electrode spacing, 48 electrodes and length of each path is 480 m. The study area is divided into 2 separate hydrological system patterns. The result show us that path 3 is the area that has the largest aquifer and its surface is a water catchment area. Groundwater tends to flow toward path 3, due to deeper aquifer conditions (> 60 m) in both hydrological systems
Eksplorasi Metode Geolistrik Resistivitas: Studi Kasus Zona Sesar Utama Manado dan Akuifer Air Tanah Di Kabupaten Minahasa Utara As'ari, As'ari; Tongkukut, Seni Herlina Juita; Suoth, Verna Albert; Panjaitan, Sarmaria; Akasi, Iftita Anugraini; Pulu, Meidy Rosalie
Jurnal MIPA Vol 11, No 1 (2022)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jm.v11i1.36103

Abstract

The Manado Fault is a fault located in North Sulawesi which is through the North Minahasa Regency. The fault area is a weak zone that is formed when a crack occurs on the earth's surface, a gap with a certain depth and width is formed, because the natural process of the gap is filled by the surrounding soil material. This weak zone has the potential to become a reservoir for rainwater, which can become a groundwater aquifer. The formation of fractures depends on the geology of an area, fracture characteristics such as the width and depth of the fracture affect the potential for groundwater stored as aquifers. This study aims to identify the influence of geology on the physical parameters of the fault that determine the potential presence of groundwater aquifers in North Minahasa Regency. The faults identified as fractures in Watutumou II Village, Kalawat District and Rap Rap Village, Airmadidi District, North Minahasa Regency are associated with fluids and form groundwater aquifers. The potential for groundwater storage is related to geological conditions following the trend of depth to fracture width with a gradient of -0.0588.
Simulasi Optimasi Suhu dari Sistem Pemanasan Temperatur Tinggi Berbasis Gelombang Mikro Sagai, Fingken Stevanus; Pandara, Dolfie Paulus; Kolibu, Hesky Stevy; Tongkukut, Seni Herlina Juita; Ferdy, Ferdy; Tamuntuan, Gerald Hendrik; Abidjulu, Gilbert
Jurnal MIPA Vol 11, No 1 (2022)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jm.v11i1.36151

Abstract

Telah dilakukan penelitian simulasi untuk menganalisis pengaruh variasi dimensi geometri tungku, daya oven gelombang mikro dan waktu pemanasan terhadap suhu tungku, dan mengoptimasi suhu tungku dalam pemanasan dengan gelombang mikro dari variasi parameter yang digunakan. Tungku kubus dengan panjang sisinya dan tungku silinder dengan diameter dan tingginya masing-masing memiliki ukuran yang sama yaitu 50 mm untuk tipe I, 70 mm untuk tipe II dan 90 mm untuk tipe III, yang terbuat dari material SiC dipanaskan dalam oven gelombang mikro pada daya 100%, 75% dan 50% dari daya maksimum 1,3 kW. Pemanasan tungku ini disimulasikan menggunakan perangkat lunak COMSOL Multiphysics. Hasil simulasi dari setiap parameter dilakukan analisis dan optimasi untuk mencapai suhu optimum 500oC dalam waktu yang singkat dengan konsumsi energinya yang rendah. Hasil simulasi yang diperoleh menunjukkan bahwa variasi parameter memengaruhi suhu yang dihasilkan tungku dan distribusi suhu di dalam tungku. Optimasi pada tungku kubus tipe II (ukuran 70 mm) yang dipanaskan dalam oven gelombang mikro dengan daya 1,3 kW (100%) mencapai suhu optimum 500oC dalam waktu relatif singkat sebesar 7 menit 33 detik (453 detik) dan konsumsi energi relatif rendah sebesar 5,889 × 105 J.Simulation research has been conducted to analyze the effect of variations in the dimensions of the furnace geometry, microwave oven power, and heating time on the furnace temperature, and optimize the furnace temperature in microwave heating from a variety of parameters used. The cube furnace with side length and cylindrical furnace with diameter and height respectively have the same size, namely 50 mm for type I, 70 mm for type II, and 90 mm for type III, which are made of SiC material heated in a microwave oven at power 100%, 75% and 50% of the maximum power of 1,3 kW. The heating of this furnace was simulated using COMSOL Multiphysics software. The simulation results for each parameter are analyzed and optimized to achieve the optimum furnace temperature of 500oC in a short time with low energy consumption. The simulation results obtained show that the parameter variations affect the temperature produced by the furnace and the temperature distribution in the furnace. Optimization of the type II cube furnace (size 70 mm) heated in a microwave oven with a power of 1,3 kW (100%) reaches the optimum temperature of 500oC in a relatively short time of 7 minutes 33 seconds (453 seconds) and relatively low energy consumption of 5,889 × 105 J.
Identifikasi Potensi Air Tanah Di Desa Tempang Menggunakan Metode IP Konfigurasi Wenner-Schlumberger Tongkukut, Seni Herlina Juita; Suoth, Verna A.; As'ari; Kalangit, Meylien
Jurnal MIPA Vol. 15 No. 1 (2025): Cover
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jm.v15i1.64617

Abstract

Seiring pertumbuhan penduduk yang terus meningkat, identifikasi air tanah bawah permukaan sangat penting untuk menunjang kebutuhan masyarakat terutama yang terkait dengan sektor pariwisata dan  pertanian di Desa Tempang, Minahasa. Penelitian ini bertujuan untuk mengidentifikasi potensi dan sebaran air tanah di Desa Tempang, Penelitian ini menggunakan metode geolistrik Induced Polarization (IP) dengan konfigurasi Wenner-Schlumberger. Metode IP mengukur chargeability bawah permukaan dengan cara mengalirkan arus listrik ke dalam tanah. Pengambilan data dilakukan dengan mengambil 4 lintasan pengukuran, dengan spasi 10 m dan panjang lintasan 480 m di setiap lintasan. Hasil pengukuran diolah menggunakan Software RES2DINV. Metode ini terbukti cukup efektif dalam mendeteksi keberadaan akuifer di bawah permukaan tanah, yang ditandai dengan nilai chargeability rendah hingga mendekati nol. Hasil penelitian menunjukkan adanya sebaran akuifer yang signifikan di wilayah penelitian dengan Lintasan 4 secara khusus menunjukkan keberadaan akuifer pada kedalaman yang relatif lebih dalam (24–58 m), yang berpotensi menjadi cadangan air tanah jangka panjang. Temuan ini memberikan informasi dasar yang penting bagi pemerintah desa dan instansi terkait dalam merencanakan eksplorasi, konservasi, serta pengelolaan sumber daya air tanah secara berkelanjutan. With the continuous growth of the population, the identification of groundwater is very important to support the needs of the community, especially those related to the tourism and agriculture sectors in Tempang Village, Minahasa. This study aims to identify the potential and distribution of groundwater in Tempang Village. This study employs the geophysical method of Induced Polarization (IP) with a Wenner-Schlumberger configuration. The IP method measures subsurface chargeability by injecting electric current into the ground. Data collection was conducted using four measurement lines, each spaced 10 m apart, with a line length of 480 m. The data were processed using the RES2DINV software. This method proved to be effective in detecting the presence of aquifers beneath the ground surface, characterized by low chargeability values approaching zero. The study results indicate the presence of a significant aquifer distribution in the study area, with Survey Line 4 specifically showing aquifer presence at relatively deeper depths (24–58 m), which has the potential to become a long-term groundwater reserve. This finding provides important baseline information for village governments and relevant agencies in planning exploration, conservation, and sustainable management of groundwater resources.
Co-Authors Abidjulu, Gilbert Abjul, Delfy Boobu Akasi, Iftita Anugraini As'ari As'ari, As'ari Ferdy . Gerald Tamuntuan Guntur Pasau Hanny F. Sangian Hartaty, Lynda Hesky Stevy Kolibu Kalangit, Meylien Malinggas, Christin Maneking, Engellita Mukuan, Eva Mukuan Mariayani Rita Pandara, Dolfie Paulus Panjaitan, Sarmaria Pulu, Meidy Rosalie Sagai, Fingken Stevanus Somalinggi, Ayu Tamod, Zetly Estefanus Tatuwo, Deny Ramon Verna A. Suoth Viola, Thevitha Refiani Wuwungan, Cynthia