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All Journal VALENSI Indonesian Journal of Chemistry Jurnal Fisika : Fisika Sains dan Aplikasinya Indigenous Biologi Mitra Mahajana: Jurnal Pengabdian Masyarakat Jurna Beta Kimia Chemistry Notes
Fidelis Nitti
Department of Chemistry, University of Nusa Cendana, Jl. Adi Sucipto, Penfui, Kupang 85001, Nusa Tenggara Timur, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Public Health Social Sciences

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IDENTIFIKASI MIKROPLASTIK PADA IKAN TONGKOL (Euthynnus affinis) SEBAGAI BIOINDIKATOR DI PERAIRAN TELUK KOTA KUPANG Nitti, Fidelis; Nalle, Tamara Baba; Boymau, Benyamin; Anait, Johanes R.; Kadang, Luther; Ola, Antonius R.B.; Baunsele, Since D.; Naat, Johnson N.
Chemistry Notes Vol 7 No 2 (2025): Chem. Notes, 7(2), 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v7i2.23042

Abstract

Microplastic pollution in coastal areas has become a serious concern due to its impact on marine environments and human health. This study examined the presence of microplastics in the digestive tracts of the tongkol fish (Euthynnus affinis) collected from two locations in Kupang Bay, namely PPI Oeba and Pasar Oesapa. A total of 16 fish samples were analyzed visually using a microscope, followed by polymer identification using Fourier Transform Infrared Spectroscopy (FTIR). Results showed that fish from PPI Oeba contained 25 microplastic particles, while those from Pasar Oesapa had 20 particles. Film-type microplastics dominated, accounting for 68% in PPI Oeba and 75% in Pasar Oesapa, followed by fibers (20% and 25%, respectively), and fragments were only found in PPI Oeba (12%). Detected polymers included polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC). This study confirms that tongkol fish can serve as effective bioindicators for monitoring microplastic pollution in the coastal waters of Kupang City.
PENGEMBANGAN SENSOR BERBASIS KERTAS DENGAN DETEKTOR SMARTPHONE UNTUK ANALISIS BORAKS DALAM MATRIKS MIE BASAH Tambaru, David; Kusmawan, Zipora A.; Nauledo, Gregorius; Nitti, Fidelis
Chemistry Notes Vol 7 No 2 (2025): Chem. Notes, 7(2), 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v7i2.26342

Abstract

Mie adalah salah satu makanan yang sangat umum di masyarakat termasuk Indonesia. Namun, mie kadang mengandung boraks, suatu zat kimia yang bersifat racun sehingga sangat berbahaya. Oleh karena itu, pengujian kandungan boraks pada mie, khususnya mie basah, perlu dilakukan secara rutin. Metode analisis boraks yang ada selama ini, biasanya menggunakan metode spektrofotometri UV-Vis. Namun mentode tersebut membutuhkan biaya mahal, dan kurang praktis untuk digunakan di lapangan. Sementara itu, sensor berbasis kertas telah menjadi alternatif dalam deteksi berbagai analit karena murah, praktis, tidak membutuhkan peralatan canggih, serta penggunaan sampel dan pereaksi yang sedikit. Selain itu metode ini dapat dibuat lebih praktis lagi dengan menggunakan smartphone sebagai detektor yang dapat dibawa ke mana-mana. Sistem deteksi boraks dengan metode ini didasarkan pada reaksi antara boraks dengan kurkumin dalam suasana asam untuk membentuk senyawa rososianin yang berwarna merah. Pereaksi terlebih dahulu diimobilisasi pada kertas kertas saring yang telah dipotong membentuk lingkaran berdiameter 0.6 mm, dan setelah kering, siap digunakan sebagai sensor boraks dengan meneteskan sampel di atas kertas yang telah mengandung pereaksi. Reaksi dengan boraks akan menyebabkan terbentuknya warna merah pada sensor, yang kemudian difoto dengan kamera smartphone. Dengan pencitraan digital, foto dianalisis dan intensitas warnanya. Pada kondisi optimum, hasil penelitian menunjukan bahwa intensitas merah hasil reaksi berbanding lurus dengan konsentrasi boraks pada rentang 0,05-1,0 ppm dan 30 – 100 ppm, dengan persamaan regresi linear masing-masing adalah y = 13,24x + 11,63 dan y = 0,196x + 45,45 dan koefisien korelasi (R2) berturut-turut adalah 0,995 dan 0,992.
ENVIRONMENTAL CONSERVATION ACTION THROUGH COMMUNITY-BASED MANGROVE SEEDLING PLANTING IN EDUCATION AND SOCIETY: THE FOLU GOES TO SCHOOL Baunsele, Since Dortia; Nitti, Fidelis; Wolo, Daniel
Mitra Mahajana: Jurnal Pengabdian Masyarakat Vol. 7 No. 1 (2026): Volume 7 Nomor 1 Maret 2026
Publisher : LPPM Universitas Flores

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/mahajana.v7i1.7602

Abstract

This community service activity aims to enhance students' and community members' knowledge, awareness, and participation in climate change mitigation efforts through socialization and mangrove seedling planting. The selection of mangrove seedling planting locations is based on observations of degrading mangrove forests that still have the potential for natural regeneration. In addition, the location is prioritized in areas experiencing anthropogenic pressure, coastal erosion, and excessive sedimentation. Socio-economic considerations are also a key factor. The planting location is close to residential areas to encourage public participation and environmental awareness. This activity is carried out in the mangrove forest tourism area, Oesapa village, Kelapa Lima sub-district, Kupang City, over a period of 2 months, namely November – December. The method for implementing the activity consists of three stages: socializing students about the role of mangrove forests; cleaning the area with the surrounding community; planting mangrove seedlings; and initial maintenance and monitoring. In addition to increasing knowledge and awareness of mangrove forests' functions, this activity also contributes to the rehabilitation of mangrove areas. It strengthens collaboration among students, the community, the government, and academics in the effort to preserve mangrove forests.
Co-Authors ., Suwari Abner Tonu Lema Agung Abadi Kiswandono Ajung, Oktaviani Anait, Johanes R. Anarato, Antonius Umbu Anselmus Boy Baunsele Antonius R.B. Ola Bartholomeus Pasangka Baunsele, Anselmus B. Baunsele, Since Dortia Bernandus Bernandus Bosirul Hoque Boymau, Benyamin Buhani Buhani Bukit, Minsyahril Daniel Wolo David Tambaru Deram, Rosalia Febriana Dina Tiara Kusumawardhani Dwi Siswanta Hery L. Sianturi Hildegardis Missa Ina, Rosinta Tamu Johannes, Albert Zicko Johnson N Naat Kadang, Luther Kalla, Eka B.S. Kapitan, Origenes Boy Kedang, Yoana Fransiska De Chantal Kedjo, Gervasia Y Kusmawan, Zipora A. Lakabela, Merliana Lapailaka, Titus Larbi Setti Lawa, Yosep Ledoh, Sherly M.F Lestarani, Dewi Lulan, Theo Y.K. Lulan, Theodore Y. K. Lulan, Theodore Y.K. Luther Kadang Meksianis Zadrak Ndii Modhe, Katarina Muhammad Cholid Djunaidi Nalle, Tamara Baba Nauledo, Gregorius Ndii, Meksianis Z Ndolu, Intan C. M. Neolaka, Yantus A B Odi Theofilus Edison Selan Ola, Pius D. Pasangka, Bartholomeus Philiphi de Rozari Pingak, Redi Kristian Pius Dore Ola Rahayu Rahayu Rahmat Basuki Rensini, William Antoni Rinawati Rinawati Sambur, Ma'aki M. D. Santos, Adelina Dos Sherlly Ledoh Soi, Maria Yuliana Soukaina Bouhmaidi Suharso Suharso Sutaji, Hadi Imam Suwari, Suwari N. Tanesib, Jehunias Leonidas Wendelina Archangela Ati Zakarias Seba Ngara Zulaicha, Annisaa Siti