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Idris Mandang, Idris
Jurusan Fisika Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Mulawarman
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Observation and numerical modeling of physical oceanography in the Balikpapan Bay, East Kalimantan: Preliminary results Putri, Mutiara Rachmat; Anwar, Iwan P; Sihotang, Zetsaona; Bernawis, Lamona I.; Setiawan, Agus; Riza, Muhammad; Mandang, Idris; Tatipatta, Willem M.
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.2.19259

Abstract

The Indonesian government plans to move the capital city from Jakarta to Penajam Paser Utara (PPU) which is the upstream area of Balikpapan Bay, East Kalimantan. There are several activities in the planned new capital city that potentially affect the condition of land and marine ecosystems, including clearing new land for housing and agriculture as well as expanding mining and petroleum areas. Directly or indirectly, these activities could affect the oceanographic conditions of Balikpapan Bay. For this reason, in order to obtain an up-to-date picture of Balikpapan Bay, an oceanographic survey was conducted in early March 2020. In addition, to support the analysis of marine dynamics in these waters and their predictions in the future, numerical simulations of hydrodynamic modeling were also carried out. Oceanographic observations indicate significant water stratification in the area about 20 km from the mouth of the bay. This result is also well illustrated in the hydrodynamic model numerical simulation, where there is a water loop at the confluence between salt and fresh water masses from two rivers 18-20 km from the mouth of Balikpapan Bay. Keywords:The national capital city of IndonesiaBalikpapan BayPhysical oceanography ObservationCoastal and marine Ecosystem
Penguatan Kapasitas Masyarakat dan Mahasiswa melalui Aksi Bersih Pantai: Upaya Konservasi Lingkungan Berbasis Edukasi dan Kolaborasi di Pesisir Samboja Sihotang, Zetsaona; Hermawan, Qori Fajar; Khoirunisa, Nanda; Riza, Muhammad; Mandang, Idris; Yusuf, Mustaid; Wiyani, Riski Indah; Rahmiati
Bakti Budaya Vol 9 No 1 (2026): 2026: Edisi 1
Publisher : Faculty of Cultural Sciences, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/bakti.9380

Abstract

This community service activity was motivated by the problem of marine waste that has an impact on the ecosystem and quality of tourism at Cemara Beach and Pemedas Beach, Samboja, East Kalimantan. To overcome this, a collaborative approach was applied by involving three strategic groups: tourism managers, the community/visitors, and students. The methods used consisted of capacity building for the community and managers, as well as service learning for students. During the two-day implementation, socialization, beach clean-up actions, marine monitoring, and waste sorting were carried out. This activity has collected 160 kg of waste, increased environmental literacy, and encouraged behavioral change. Students gained contextual experience in oceanographic monitoring and waste identification. The implications of this activity include plans to establish a fostered beach as a center for sustainable capacity development that supports environmental conservation and community welfare. The results show that multi-actor collaboration is able to create significant social and ecological impacts in coastal areas. === Kegiatan pengabdian ini dilatarbelakangi oleh permasalahan sampah laut yang berdampak pada ekosistem dan kualitas wisata di Pantai Cemara dan Pantai Pemedas, Samboja, Kalimantan Timur. Untuk mengatasi hal ini, pendekatan kolaboratif diterapkan dengan melibatkan tiga kelompok strategis: pengelola wisata, masyarakat/pengunjung, dan mahasiswa. Metode yang digunakan terdiri dari capacity building bagi masyarakat dan pengelola, serta service learning untuk mahasiswa. Selama pelaksanaan dua hari dilakukan sosialisasi, aksi bersih pantai, pemantauan laut, dan pemilahan sampah. Kegiatan ini telah mengumpulkan 160 kg sampah, meningkatkan literasi lingkungan, dan mendorong perubahan perilaku. Mahasiswa memperoleh pengalaman kontekstual dalam pemantauan oseanografi dan identifikasi sampah. Implikasi dari kegiatan ini mencakup rencana pembentukan pantai binaan sebagai pusat pengembangan kapasitas berkelanjutan yang mendukung konservasi lingkungan dan kesejahteraan masyarakat. Hasilnya menunjukkan bahwa kolaborasi multiaktor mampu menciptakan dampak sosial dan ekologis yang signifikan di kawasan pesisir.
Phytochemical Composition, and Antioxidant Activity of Stingless Bee (Heterotrigona Itama) Propolis for Wound Healing Potentials Sukmana, Mayusef; Paramita, Swandari; Yasir, Yadi; Wahyuningsih, Sri; Mandang, Idris; Ramdan, Iwan Muhammad; Sawitri, Endang; Tarigan, Daniel
Open Access Health Scientific Journal Vol. 7 No. 1 (2026): February 2026
Publisher : Griya Eka Sejahtera

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55700/oahsj.v7i1.203

Abstract

Background: Propolis from stingless bees Heterotrigona itama(H.itama) is a promising natural product with diverse biomedical applications. However, its bioactivity and antioxidant for wound healing remain poorly understood. This study aimed to evaluate phytochemical profile, and antioxidant activity of H. itama propolis collected from land forest in Kalimantan, Indonesia.Methods: Qualitative phytochemical screening was performed to identify secondary metabolites, and antioxidant capacity was assessed using the DPPH radical scavenging assay with ascorbic acid as a reference standard. The result of the phytochemical content and antioxidant activity will be compared with the literature study on wound healing.Results: Phytochemical tests showed the presence of flavonoids, saponins, tannins, phenolics, triterpenoids, terpenoids, and DPPH assay revealed  antioxidant activity with an IC₅₀ value of 159.91 ppm compared to 2.71 ppm for ascorbic acid.Conclusion: H. itama propolis biologically active, demonstrating  antioxidant potential linked to its phenolic and flavonoid content. These findings support that phytochemical content and antioxidant activity are  potentials for wound healing.
Co-Authors Agus Setiawan Ahmad Zarkasi Ali Murtopo Aman Sentosa Panggabean Anggara, Geogy ani, ani ani Anugrah Aditya Budiarsa, Anugrah Anwar, Iwan P Arifin, Muhammad Syahrul Azizah Bella Azizah Bella Bernawis, Lamona I. Boediman, Manasye Micel Daniel Tarigan Devina Rayzy Perwitasari Sutaji Putri Endang Sawitri Fachrudy Asj'ari Hamdhani, Hamdhani Henny Pagoray, Henny Irwan Ramadhan Ritonga Khairunnisa, Nia Kurniawan, Burhan Lepong, Piter Mislan Mubarrok, Saat Muhammad Riza Muhammad Riza Munir, Rahmiati Musyaffa, Nur Rafif Najwan Al-Ghifari Nanda Khoirunisa Napitupulu, Gandhi Nur, Ashadi Arifin Nurwijayanti Perwitasari, Devina Rayzy Prasetyo, Mohammad Aji Putri, Mutiara Rachmat Qori Fajar Hermawan Rahmawati Munir Rahmiati Rahmiati Rahmiati Ramdan, Iwan Muhammad Rezky, Bayu Rizqi, Puteri Buana Romawan, Francis Seravino Rudy Agung Nugroho Saibun Sitorus Samsul Rizal Subagyono, RR Dirgarini Julia Swandari Paramita Tatipatta, willem M. Totok Suprijo Wahidah Wahidah Wiyani, Riski Indah Yadi Yasir Yusuf, Mustaid Zetsaona Sihotang