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Raudhah Hayatillah
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Faculty of Science and Technology Building, Universitas Islam Negeri Ar-Raniry, Darussalam, Banda Aceh, 23111.
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INDONESIA
Kenanga : Journal of Biological sciences and Applied Biology
Published by Universitas Islam Negeri Ar-Raniry Banda Aceh
ISSN : 27973166     EISSN : 27769216     DOI : https://doi.org/10.22373/kenanga
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology
KENANGA Journal of Biological Sciences and Applied Biology is a peer-reviewed open access journal that publishes study results (original research articles and review articles). This journal covers all areas of biological science research and applied biology research such as Botany Zoology Microbiology Genetics Ecology Physiology Biochemistry Integration Between Islam and Bioscience
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 104 Documents
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ISOLASI DAN UJI AKTIVITAS ENZIM SELULASE PADA BAKTERI SELULOLITIK DARI SERASAH AKASIA (Acacia mangium Willd.) Tazkiatun Nufus; Diannita Harahap
KENANGA : Journal of Biological Sciences and Applied Biology Vol. 5 No. 2 (2025): Oktober 2025
Publisher : Program Studi Biologi Fakultas Sains dan Teknologi Universitas Islam Negeri Ar-Raniry Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/kenanga.v5i2.8483

Abstract

Cellulase is an enzyme with high demand in the industrial sector and can be extracted from cellulolytic bacteria. These bacteria are capable of producing cellulase and hydrolyzing cellulose into simple products such as glucose. The content of acacia leaves consists of 50.77% cellulose, hemicellulose, and lignin. This study aimed to determine the characteristics, identification, and enzymatic activity of cellulolytic bacteria isolated from acacia litter (Acacia mangium Willd.). The methods used in this research were both quantitative and qualitative, involving the isolation of cellulolytic bacteria from acacia litter using selective CMC media by the spread plate method, clear zone testing using the Kirby–Bauer method, and enzyme activity assays. Eight cellulolytic bacterial isolates (BS1, BS2, BS3, BS4, BS5, BS6, BS7, and BS8) with different morphological characteristics were obtained. Based on macroscopic, microscopic, and biochemical identification, the isolates were identified as belonging to the genera Cellulomonas sp. (BS1 and BS3), Pseudomonas sp. (BS2, BS4, BS5, BS6, and BS8), and Corynebacterium sp. (BS7). The two isolates showing the highest clear zone indices on CMC media were BS1 with an IS value of 0.90 and BS7 with an IS value of 0.74. The cellulase enzyme activity of isolate BS1 (Cellulomonas sp.1) was 0.0041 U/mL with a specific activity of 0.0032 U/mL, while that of isolate BS7 (Corynebacterium sp.) was 0.0049 U/mL with a specific activity of 0.0019 U/mL. Keywords: cellulase enzyme; cellulolytic bacteria; Acacia mangium Willd.
MENJELAJAHI SPESIES BURUNG DI PULAU BREUEH, KECAMATAN PULO ACEH, PROVINSI ACEH Yuri Gagarin; Tarmizi, Heri; Muarrif, Samsul; Muhajir, Muhajir; Abdullah, Abdullah
KENANGA : Journal of Biological Sciences and Applied Biology Vol. 5 No. 2 (2025): Oktober 2025
Publisher : Program Studi Biologi Fakultas Sains dan Teknologi Universitas Islam Negeri Ar-Raniry Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/kenanga.v5i2.8660

Abstract

Pulau Breueh, located in Pulo Aceh District, Aceh Besar Regency, Aceh Province, Indonesia, is renowned for its rich avifaunal diversity. However, comprehensive data on bird species distribution and abundance on the island remain limited, highlighting the need for detailed studies to support conservation efforts. This study aimed to document and analyze the bird species present on Pulau Breueh, focusing on their distribution across various habitats. Field observations were conducted in July 2024 using two methods: the transect method, covering a 20 km route across coastal and inland areas, and the point count method, with observations at strategic locations. A total of 34 bird species from 19 families were identified, including coastal species such as the Pacific Reef Egret (Egretta sacra) and forest-dwelling birds like the Crested Serpent Eagle (Spilornis cheela). The findings underscore the ecological significance of Pulau Breueh as a habitat for diverse avian communities and emphasize the importance of conservation measures to mitigate threats such as habitat alteration and hunting. Recommendations include habitat protection, community education, and continuous monitoring to preserve this biodiversity hotspot. Keywords: bird; Pulau Breueh; biodiversity; conservation
IDENTIFIKASI VEGETASI TUMBUHAN DI KAWASAN MATING RING KUAU RAJA (Argusianus argus) DI STASIUN PENELITIAN SORAYA, KAWASAN EKOSISTEM LEUSER, KOTA SUBULUSSALAM Furida, Asra; Hidayat, Muslich
KENANGA : Journal of Biological Sciences and Applied Biology Vol. 5 No. 2 (2025): Oktober 2025
Publisher : Program Studi Biologi Fakultas Sains dan Teknologi Universitas Islam Negeri Ar-Raniry Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/kenanga.v5i2.8283

Abstract

The presence of mating rings of the Great Argus (Argusianus argus) is strongly influenced by vegetation structure and surrounding environmental conditions. However, scientific studies focusing on vegetation characteristics associated with mating ring sites remain limited. This study aimed to identify the composition of plant vegetation and environmental factors surrounding the mating rings of the Great Argus at the Soraya Research Station, Leuser Ecosystem Area, Subulussalam City. Data were collected using roaming surveys and purposive sampling at eight mating ring sites. Vegetation analysis was conducted using a 100 × 100 m main plot with four subplots representing tree, pole, sapling, and understory strata. Environmental parameters measured included air and soil temperature, humidity, light intensity, soil pH, elevation, slope, diameter at breast height (DBH), and mating ring diameter. The results recorded 1,229 individual plants comprising 147 species from 36 families. Dominant vegetation consistently found across most mating ring sites included Shorea multiflora, Sloetia elongata, Croton argyratus, and Gironniera subaequalis. These vegetation types generally formed moderately open canopies with local microclimatic conditions characterized by moderate light intensity, high humidity, and near-neutral soil pH. The findings indicate that vegetation structure and microhabitat conditions play an important role in supporting the formation of mating rings of the Great Argus. This study provides essential baseline ecological data to support habitat management and conservation efforts for the Great Argus within the Leuser Ecosystem.  Keywords:  Great Argus (Argusianus argus), Mating Ring, Vegetation, Soraya Research Station
ANALISIS CEMARAN BAKTERI Coliform PADA PANGAN SEGAR ASAL TANAMAN DI BANDA ACEH MENGGUNAKAN METODE MPN (Most Probable Number) kamaliah, kamaliah; junita, mela; fajri, cut zahratul; khalida , meutia; mahara, tika; thahira, afifah; fitria, fitria
KENANGA : Journal of Biological Sciences and Applied Biology Vol. 5 No. 2 (2025): Oktober 2025
Publisher : Program Studi Biologi Fakultas Sains dan Teknologi Universitas Islam Negeri Ar-Raniry Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/kenanga.v5i2.8413

Abstract

Food safety is a crucial aspect that significantly impacts consumer health and safety, particularly in the consumption of fresh foods such as curly red chilies (Capsicum annuum L.), shallots (Allium cepa), mangoes (Mangifera indica), and cucumbers (Cucumis sativus). This study aimed to detect the presence of Escherichia coli bacteria in these food samples using the Most Probable Number (MPN) method, which includes presumptive, confirmatory, and complementary tests, as well as the IMVIC biochemical test to identify coliform bacteria species. Samples were collected aseptically from various locations in Banda Aceh and tested in a food safety laboratory. The results showed that curly red chilies (3.6/g), cucumbers (9.2/g), and red onion (9.2/g) contained microbial contamination exceeding the national standard safety limit (<3/g), while mangoes (9.2/g) met safety requirements (<20/g). These findings emphasize the importance of strict monitoring and implementation of food safety standards to prevent health risks due to microbial contamination in fresh food products. Furthermore, this study underscores the need to increase awareness and manage food distribution to ensure that products consumed by the public are truly safe and support national food security. Keywords: Food safety; Escherichia coli; Most Probable Number (MPN) method

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