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All Journal Jurnal Pengolahan Hasil Perikanan Indonesia Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Teknomekanik Journal of Materials Exploration and Findings
Azizah Intan Pangesty
Department Of Metallurgical And Material Engineering, Faculty Of Engineering, Universitas Indonesia, Kampus UI, Kukusan, Kecamatan Beji, Kota Depok, Jawa Barat 16425
Agriculture, Biological Sciences & Forestry Environmental Science Mechanical Engineering

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Concentration, distribution, and characteristics of microplastic in estuary, coast and marine organisms in Indonesia: A Preliminary Review Nurhana Rafika Sari; Azizah Intan Pangesty; Mochamad Chalid; Oman Zuas
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 6, No 1 (2022)
Publisher : Sekolah Tinggi Ilmu Pertanian Wuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.6.1.57-64

Abstract

There is a rising concern regarding the accumulation of microplastics (MPs) in the aquatic ecosystems. Monitoring effort is crucial to understand the concentration and distribution of MPs. The objective of this paper is to mapping the concentration and characteristics of MPs distributed/deposited in estuary, coast, sediment, and marine organism in Indonesia based on data published from the last five years. In the estuary and coast, the highest MPs concentration were located in Brantas River, East Java, around 133 - 5467 particles/m3.  In sediment, the highly amount of MP’s, 1136 particles/kg, were found in Kawal village, Bintan Island, Riau. In marine organism, horn snail (Telescopium telescopium) from Rambut Island, Jakarta Bay contained the highest amount of MP’s around 764.81 particles/individual . MPs were commonly found in fragments, fibers, and films with size ranging between 1 μm - 5 mm. Those MPs are mostly made of polyethylene (PE), polypropylene (PP), polystyrene (PS) and polyesters (PES). The data summary obtained in this study could be useful for understanding the sources of MPs as well as monitoring the environmental condition in the aquatic ecosystems.
Local Chlorhexidine Delivery for Periodontal Infection Therapy: A Short Review Najmudin, Muhammad Guruh; Pangesty, Azizah Intan; Riastuti, Rini; Sunarso, Sunarso; Abdullah, Abdul Halim
Journal of Materials Exploration and Findings Vol. 2, No. 2
Publisher : UI Scholars Hub

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Abstract

Oral diseases affected more than half of the world’s population. Periodontitis is the second biggest threat to oral health after dental caries. Periodontitis is an inflammation inside periodontal pockets caused by pathogenic microbial colonies which lead to destruction of bone tissue and soft tissue. Chlorhexidine gluconate is an antimicrobial agent that effective to destroy pathogenic microbial and cure periodontitis. Chlorhexidine gluconate is given locally using a carrier material to the infected area. There are several materials that can be used to deliver Chlorhexidine gluconate to the infected periodontal tissue such as gel, liquid (mouthwash), and chip. This short review aims to describe the current methods to deliver Chlorhexidine gluconate to the infected periodontal tissue, including the advantages, disadvantages, and the future trend of the carrier materials used for periodontitis treatment. Future research about materials that can help to optimize tissue restorative after cure periodontitis would be beneficial.
Effect of sulfuric acid treatment in cellulose nanocrystals extraction from Sargassum sp. seaweed: Efek perlakuan asam sulfat pada ekstraksi selulosa nanokristal dari rumput laut Sargassum sp. Fransiska, Dina; Hastiana, Sabina; Sidartha, B. Boy Rahardjo; Pangesty, Azizah Intan; Chalid, Mochamad; Priadi, Dedi; Ausias, Gilles; Hari Eko Irianto
Jurnal Pengolahan Hasil Perikanan Indonesia Vol. 28 No. 9 (2025): Jurnal Pengolahan Hasil Perikanan Indonesia 28(9)
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17844/y5x3as39

Abstract

Sargassum sp. adalah jenis rumput laut cokelat yang banyak ditemukan di perairan tropis, namun belum dimanfaatkan secara optimal. Kandungan selulosa yang tinggi dalam Sargassum sp. dapat digunakan untuk menghasilkan selulosa nanokristal (CNC). CNC dapat digunakan sebagai bahan nano penguat bionanokomposit. Penelitian ini bertujuan untuk menentukan konsentrasi asam sulfat yang optimum untuk mengekstraksi nanokristal selulosa dari Sargassum sp. CNC dari Sargassum sp. diekstraksi menggunakan metode hidrolisis asam dan sonikasi. Variasi konsentrasi asam sulfat pada proses ekstraksi CNC, yaitu 30, 40, 50, dan 60%. Karakterisasi CNC dilakukan menggunakan spektroskopi inframerah (FTIR), difraksi sinar-X (XRD), dan analisis termogravimetri (TGA). Analisis FTIR mengonfirmasi keberadaan puncak gugus fungsi khas CNC, termasuk C–O–C (\~1160 cm⁻¹), C–O (\~1050–1030 cm⁻¹), dan C–H β-(1→4)-glikosidik (\~897 cm⁻¹) sebagai sidik jari CNC. Hal ini menunjukkan bahwa CNC yang diekstraksi melalui hidrolisis asam sulfat memiliki perbedaan yang signifikan dibandingkan dengan bahan baku Sargassum sp. Selain itu, hasil XRD menunjukkan bahwa hidrolisis asam berpengaruh pada berkurangnya daerah amorf pada CNC. Analisis XRD menunjukkan tingkat CNC tertinggi sebesar 77,6% pada hidrolisis asam sulfat 40%. Analisis termal menggunakan TGA dan DTG menunjukkan bahwa CNC yang diproses dengan hidrolisis asam sulfat 40% menghasilkan CNC dengan stabilitas termal yang meningkat, menunjukkan suhu dekomposisi termal sebesar 369,60 °C. CNC yang diisolasi dari Sargassum sp. berpotensi sebagai bahan pembuatan nanokomposit dalam berbagai aplikasi, misalnya bidang farmasi, pengemasan makanan, dan biomedis.
The Risk Identification On 3" GL BO3-52520 Process Pipelines Using a Risk-Based Inspection Method Putra, Angga Pratama; Soedarsono, Johny Wahyuadi; Pangesty, Azizah Intan; Yusran asfar, Muhammad Ibkar; Aprizal, Aprizal; Ramadhan, Romal
Teknomekanik Vol. 5 No. 1 (2022): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (253.874 KB) | DOI: 10.24036/teknomekanik.v5i1.12772

Abstract

The oil and gas industry can contribute significantly to sustainable development by mitigating negative environmental impacts, such as equipment failure. Numerous pipeline failures have occurred due to the dramatic expansion of the oil and gas product distribution pipeline network, which is a significant factor in the offshore gas pipeline network's failure. In general, compared to other equipment types in the industry, planning inspections presents more challenges. Due to a lack of jurisdictional requirements regarding inspection intervals and piping methods. This research aims to ensure the reliability by conducting a risk assessment of the likelihood and consequences of equipment failure, mitigating the impact of that risk, and developing a more optimal inspection plan. This study is focused on API Class 5L Pipe 3" GL BO3-52520. The Routine Inspection Technique (RBI) was implemented in 2016 following the API 581 standard. This semi-quantitative approach is built based on operational data and validated inspection results. According to the risk assessment, the pipeline will have a Medium risk level, with metal losses occurring in each segment. Four years after the risk-based inspection assessment, the recommended inspection plan for gas pipelines is four years.
Co-Authors Abdullah, Abdul Halim Angga Pratama Putra, Angga Pratama Aprizal Aprizal Ausias, Gilles Dedi Supriadi Fransiska, Dina Hari Eko Irianto Hastiana, Sabina Johny Wahyuadi Soedarsono Mochamad Chalid Najmudin, Muhammad Guruh Nurhana Rafika Sari Oman Zuas Ramadhan, Romal Rini Riastuti, Rini Sidartha, B. Boy Rahardjo Sunarso Sunarso Yusran asfar, Muhammad Ibkar