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All Journal Solah Medula SITEKIN: Jurnal Sains, Teknologi dan Industri Jurnal Rekayasa Infrastruktur Asian Journal of Aquatic Sciences QISTINA: Jurnal Multidisiplin Indonesia SEMNASTERA (Seminar Nasional Teknologi dan Riset Terapan) Riset Informasi Kesehatan Jurnal RAK (Riset Akuntansi Keuangan) Humanitas: Indonesian Psychological Journal Jurnal Farmasi Klinik - Best Practice (JFKlin) Tropical Marine Environmental Sciences
WULANDARI, APRILIA
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ISOLATION AND IDENTIFICATION OF DEGRADING BACTERIA MICROPLASTICS ON THE SURFACE WATER IN BAGANSIAPIAPI WATERS, RIAU PROVINCE Wulandari, Aprilia; Nursyirwani, Nursyirwani; Feliatra, Feliatra
Asian Journal of Aquatic Sciences Vol. 8 No. 2 (2025): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.8.2.258-267

Abstract

Microplastic pollution in the marine environment seriously threatens aquatic ecosystems, including in the coastal areas of Bagansiapiapi, Riau Province. This study aims to isolate and identify microplastic-degrading bacteria from the sea surface and test their degradation ability. Sampling was carried out at three different locations in the Bagansiapiapi waters, and then isolation, morphological identification, and biochemical tests were carried out at the Marine Microbiology Laboratory, Universitas Riau. Microplastic degradation tests using LDPE plastic were carried out for 30 days, and molecular identification was carried out using the 16S rRNA PCR method. The results showed significant differences in the number of bacteria between stations. Station I (port area) showed the highest bacterial density of 31.8 × 10⁴ CFU/ml. Six of the 14 bacterial isolates obtained showed the ability to degrade microplastics, with ISL 14 (Bacillus sp.) showing the highest degradation percentage of 30.38%. This finding shows the potential for utilizing local bacteria as bioremediation agents for microplastics in the marine environment effectively and environmentally friendly
MEASUREMENT AND STRATEGY TO IMPROVE THE PRODUCTIVITY OF MADURA’S PEOPLE’S SALT BUSINESS WITH OBJECTIVE MATRIX (OMAX) AND TRAFFIC LIGHT SYSTEM (CASE STUDY : PEOPLE SALT SUMENEP) Wulandari, Aprilia; Anna, Ika Deefi; Cahyadi, Indra
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 21, No 2 (2024): June 2024
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v21i2.26921

Abstract

Sumenep Regency is the largest salt producing district on the island of Madura. However, the productivity of salt produced is still low. Therefore, this study aims to measure the salt productivity of the people of Sumenep, find out the factors that affect salt productivity, and provide recommendations for improvements to increase the salt productivity of the people of Sumenep. Productivity measurement uses  the Objective Matrix (OMAX) method which uses 5 ratios, namely land area, salt selling price, salt farmer group, quality salt 1 and quality salt 2. The next stage is to measure the value of productivity on each criterion, determine targets and weights using the Analytical Hierarcy Process (AHP) method, determine targets and calculate OMAX levels and analyze the productivity of salt production of the people of Sumenep. The results of productivity calculations using the OMAX method showed that the highest productivity index occurred in September at 572.319%, while the lowest productivity index occurred in August at -66.727%. Based on the traffic light system method, recommendations for improvement to increase ratio 4 (quality 1) and ratio 5 (quality 2) are by making tunnels or prism houses and the use of geomembranes that can increase salt production in quantity and quality.
Analisis Perbandingan Kinerja Struktur Rangka Baja Bertingkat dengan dan Tanpa Perangkat Dissipasi Energi Berbasis Baja LYP (Low-Yield-Point) Wanto, Sri; Virawan, Zikra Fauzan; Wulandari, Aprilia; Devianty, Sherly; Firkhati Hidayah, Nurul
SEMNASTERA (Seminar Nasional Teknologi dan Riset Terapan) Vol 7 (2025)
Publisher : SEMNASTERA (Seminar Nasional Teknologi dan Riset Terapan)

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

Abstract

Abstrak  Penelitian ini menganalisis kinerja seismik struktur gedung bertingkat dengan dan tanpa perkuatan baja LYP (Low-Yield-Point) menggunakan pendekatan numerik berbasis pemodelan dinamis. Metode yang digunakan mencakup Dynamic Time History, Pushover Analysis, dan evaluasi kurva kerapuhan (fragility curve), dengan input gempa nyata dari data akselerogram Kobe. Pemodelan dilakukan pada struktur baja 5 lantai menggunakan perangkat lunak SeismoStruct, dengan variasi mutu baja LYP: LYP100, LYP160, dan LYP235.Hasil penelitian menunjukkan bahwa penggunaan LYP235 secara signifikan meningkatkan kapasitas geser dasar dan mengurangi interstory drift ratio hingga di bawah batas aman standar, serta memperbaiki pola kurva histeresis menjadi lebih stabil dan simetris. Spektrum kapasitas dan kurva fragility menunjukkan peningkatan kinerja struktur dalam hal disipasi energi, kontrol deformasi, dan penurunan risiko kerusakan untuk berbagai tingkat intensitas gempa. Dengan demikian, baja LYP235 terbukti efektif sebagai solusi retrofit untuk meningkatkan ketahanan struktur terhadap beban seismik. Kata kunci: Low Yield Point, SeismoStruct, Interstory Drift Ratio, Kurva Fragility, Retrofit Seismik.
Co-Authors Andani, Hasma Anita Wijayanti Annisa Annisa Aryani, Silvi Febri Effendi, RE Rizal Fadhila, Faiza Feliatra Firkhati Hidayah, Nurul Hayati, Lulu Ika Deefi Anna, Ika Deefi INDRA CAHYADI, INDRA Muhammad Abdan Shadiqi Munte, Mateo Samuel Nursyirwani, Nursyirwani Purnama, Irma Anggraini Putri, Rahma Lia Qasthalani, Azfa Duta Rahmadanti, Salsabila Santi Perawati, Santi Shandy, Jacinda Qoidatun Sherly Devianty, Sherly Silvia Kristanti Tri Febriana Simanjuntak, Jonatan Danuardi Siti Nurlaela Wanto, Sri Wantoro, Mamik Zikra Fauzan Virawan