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All Journal Natural Science: Journal of Science and Technology bionature Prosiding Seminar Biologi PROSIDING SEMINAR KIMIA Journal of Tropical Biodiversity and Biotechnology Indonesia Chimica Acta Indonesian Journal of Chemistry Indonesian Journal of Pure and Applied Chemistry Communications in Science and Technology Jurnal Ilmu Alam dan Lingkungan SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Chemistry Indonesian Journal of Chemical Research Scripta Biologica Fullerene Journal of Chemistry Indobiosains Molekul: Jurnal Ilmiah Kimia
Ahyar Ahmad
Universitas Hasanuddin
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary Other

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Optimasi Pertumbuhan Bakteri Laut Penghasil Protease Menggunakan Variasi Konsentrasi Media Skim Milk Modifikasi Anita, Anita; Natsir, Hasnah; Ahmad, Ahyar; Taba, Paulina; Karim, Harningsih
Indobiosains 2025: Volume 7 Nomor 1 Februari 2025
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/indobiosains.v7i1.17822

Abstract

This study aims to analyze the growth rate of marine bacteria producing protease using variations in the concentration of skim milk media and to observe the relationship between cell growth and enzyme activity. The study was conducted using three concentrations of skim milk media (1%, 2%, and 3%) and observation of growth and enzyme activity for 108 hours. The results showed that 1% skim milk concentration produced the largest proteolytic zone diameter (13.8 mm) with the fastest growth (1 day). Observations of cell growth patterns and enzyme activity showed that the highest enzyme activity (0.5933 U/mL) occurred in the early growth phase and decreased in subsequent phases even though cell growth increased. This indicates that there is no linear relationship between cell growth and enzyme activity in marine bacteria-producing protease, where enzyme production and activity are influenced by various complex factors such as physiological conditions of the cells and nutrient availability.
The Toxicity and Cytotoxicity Test of Anticancer Peptides Isolated from Symbiotic Bacteria Asmi, Nur; Ahmad, Ahyar; Natsir, Hasnah; Karim, Harningsih; Muhakim, Ali; Khairunnur, Siti
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Vol. 18 No. 1 (2025): Volume 18, No 1: June 2025
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/ica.v18i1.43925

Abstract

The purpose of this research was to evaluate the toxicity and cytotoxicity of the fragment peptide from symbiotic bacteria in the lung cancer LK-2 cell line, compared normal M5S cell line. Protein hydrolyzates were separated using Molecular Weight Cut Off (MWCO) to isolate peptide fragments. Fragments were categorized as ≤ 5 kDa, > 5-10 kDa, and > 10 kDa to evaluate their toxicity through the Brine Shrimp Lethality Test (BSLT) method and to study cytotoxicity effects and proliferation in LK-2 lung cancer cells against normal M5S cells. MTT assay was used to analyze the percentage of living cells and cell growth. The Selectivity Index (SI) equation was applied to determine selectivity. Findings indicated that the peptide fragment ≤ 5 kDa had the highest toxicity, with an LC50 of 8.15 µg/ml. The number of LK-2 cells that died increased when exposed to peptide fragments of sizes ≤ 5 kDa, > 5-10 kDa, and > 10 kDa over 16 hours. Moreover, cell growth in LK-2 cells decreased after 16 hours, while there was no significant decline (P < 0.05) in M5S cells compared to the controls. The peptide fragments with molecular weights ≤ 5 kDa and > 5-10 kDa demonstrated the highest selectivity, resulting in an SI value of 3. These results suggest that the selected peptide fragments may serve effectively as anticancer agents. This study highlights the potential of peptides from symbiotic bacteria as possible treatments for cancer, particularly lung cancer.
Edukasi pemanfaatan limbah cangkang rajungan menjadi pengawet alami pada kelompok nelayan "Mappedeceng" Natsir, Hasnah; Arfah, Rugaiyah A.; Karim, Muh. Yusri; Raya, Indah; Ahmad, Ahyar; Zakir, Masculine; Nadir, Muhammad; Mardiyanti, Riska; Rasyid, Herlina; Erviani, Andi Evi; Aziz, Fitriani; Anita, Anita; Rauf, Wahyudin; Gita, Gita; Khotimah, Husnul; Alam, Muh. Nur
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 9, No 5 (2025): September (In Progress)
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v9i5.34094

Abstract

Abstrak Limbah cangkang rajungan yang mencapai 40-60% dari total bobot rajungan selama ini hanya dibuang ke lingkungan sehingga menimbulkan pencemaran di daerah pesisir. Kegiatan pengabdian masyarakat ini bertujuan memberikan edukasi dan pelatihan kepada kelompok nelayan "Mappedeceng" di Desa Lasitae, Kecamatan Tanete Rilau, Kabupaten Barru tentang pemanfaatan limbah cangkang rajungan menjadi kitosan sebagai pengawet alami. Metode pelaksanaan terdiri dari tiga tahapan yaitu persiapan, pelaksanaan (penyuluhan, pelatihan teknologi pengolahan, dan praktik langsung), serta evaluasi melalui pre-post test. Kegiatan dilaksanakan pada 9 Agustus 2025 dengan melibatkan 40 peserta. Hasil evaluasi menunjukkan peningkatan pengetahuan peserta sebesar 38,75% berdasarkan perbandingan skor pre-test (rata-rata 10,575) dan post-test (rata-rata 18,325). Kegiatan praktik pembuatan pengawet alami menunjukkan antusiasme tinggi dari peserta, dengan mayoritas merasa percaya diri menerapkan teknologi ini di rumah. Kitosan yang dihasilkan terbukti dapat memperpanjang masa simpan produk perikanan hingga 2-3 kali lipat dan memiliki nilai ekonomi tinggi sekitar Rp 75.000-100.000 per kilogram. Program ini berhasil meningkatkan kesadaran nelayan tentang pentingnya ekonomi sirkular dalam perikanan dan memberikan solusi berkelanjutan untuk mengatasi masalah limbah cangkang rajungan sekaligus menciptakan peluang ekonomi baru bagi masyarakat pesisir. Kata kunci: limbah cangkang rajungan; kitosan; pengawet alami; pemberdayaan nelayan; teknologi pengolahan limbah. Abstract Crab shell waste, which accounts for 40-60% of the total weight of crabs, is often dumped into the environment, causing pollution in coastal areas. This community service activity aims to provide education and training to the "Mappedeceng" fishing group in Lasitae Village, Tanete Rilau District, Barru Regency, on the utilization of crab shell waste into chitosan as a natural preservative. The implementation method consists of three stages: preparation, implementation (counseling, processing technology training, and direct practice), and evaluation through a pre-post test. The activity was carried out on August 9, 2025, involving 40 participants. The evaluation results showed an increase in participant knowledge of 38.75% based on a comparison of pre-test scores (average 10.575) and post-test (average 18.325). The practical activity of making natural preservatives showed high enthusiasm from the participants, with the majority feeling confident in applying this technology at home. The resulting chitosan has been proven to extend the shelf life of fishery products by two to three times and has a high economic value of around IDR 75,000-100,000 per kilogram. This program has successfully raised awareness among fishermen about the importance of a circular economy in fisheries and provided a sustainable solution to address the problem of crab shell waste while creating new economic opportunities for coastal communities. Keywords: crab shell waste; chitosan; natural preservative; fishermen empowerment; waste processing technology.
Co-Authors Abdul Karim Abdul Rauf Patong Abubakar, Andi Nur Fitriani Ade Rifka Junita Ahmad Fudhail  Majid Ajuk Sapar Alam, Muh. Nur Alfian Noor Ali Muhakim Andi Erwin Eka Putra Andi Evi Erviani Anita Anita Arfah, Rugaiyah A. Arfah, Rugaiyah Andi Arfiani Nur Aslinda, Wery Asmuddin Nasir Asmuddin Natsir Aziz, Fitriani Burhanuddin Bahar Burhanuddinnur, Muhammad Cut Muthiadin dwyana, Zarsawaty Eva Johannes Fadliah, Fadliah Firdaus Firdaus Firdaus Hamid Gita, Gita Hafsan, Hafsan Hanapi Usman Harningsih Karim Harningsih Karim Hasnah Natsir Husnul Khotimah Indah Raya Irfandi, Rizal Isna Rasdianah Aziz Kasturiasih, Ni Putu Khairunnur, Siti Laily Agustina Laily Agustina, Laily M. Sabir Maming Gaffar, Maming Mardiyanti, Riska Mashuri Masri Maslan, Muhammad Maswati Baharuddin Miftahul Jannah Mochammad Hatta Muh. Yusri Karim Muhammad Nadir Muhammad Reza Primaguna Munadi, Rachmin Negara, Satria Putra Jaya Nunuk H. Soekamto Nunuk Hariani Soekamto Nur Asmi Nur Indah Purnamasari Nur Umriani Nurhikmah Nurhikmah Nurjannah Nurjannah Paulina Taba PRATAMA, IRHAM Putri, Tri Widayati Ramadani, Ananda Rasyid, Herlina Rauf, Wahyudin Ressy Dwiyanti Riksfardini Annisa ERMAWAR Risdianto, I Wayan Rosdiana Natzir Sarlan, Sarlan SITI HALIMAH LAREKENG, SITI HALIMAH Sri Wahyuni Sukmawaty, Eka Sulistiani Jarre Suriati Eka Putri Syamsurya, Syamsurya USMAN - Usman Usman Yasser, M Yuniar Harviyanti Yunita, Vivi Alfi Yusafir Hala Zakir, Masculine