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All Journal HAYATI Journal of Biosciences Saintia Biologi Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati agriTECH JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Jurnal Penelitian Pendidikan IPA (JPPIPA) Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Jurnal Pembelajaran dan Biologi Nukleus Jurnal Ilmiah Biologi UMA (JIBIOMA)
KIKI NURTJAHJA
Departemen Biologi, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Sumatera Utara Jl. Bioteknologi No.1, Kampus USU, Medan, Indonesia 20155
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences

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Journal : Jurnal Ilmiah Biologi UMA (JIBIOMA)

 1 
Pengaruh Konsentrasi Air Kelapa dan Air Cucian Beras dan Lama Perendaman Terhadap Perkecambahan Benih Kacang Hijau (Vigna radiata L.) Srimaulinda Srimaulinda; Kiki Nurtjahja; Riyanto Riyanto
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 3, No 2 (2021): November
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v3i2.751

Abstract

Air kelapa adalah senyawa alami kompleks yang sering digunakan sebagai pengatur tumbuh alami.   Penggunaan air kelapa sebagai bahan organik merupakan alternatif dari penggunaan bahan sintetis pada tanaman. Tujuan penelitian ini adalah untuk mengetahui pengaruh konsentrasi limbah dalam air kelapa dan air cucian beras serta lama perendaman terhadap perkecambahan biji kacang hijau. Parameter yang diamati adalah tinggi globul, jumlah radikula, dan panjang radikula. Berdasarkan hasil penelitian, air kelapa dan air cucian beras berpengaruh terhadap tinggi bulu dimana bulu tertinggi terdapat pada kombinasi (20 ml air kelapa + 80 ml air cucian beras dan perendaman 2 jam). Panjang radikula terpanjang ditemukan pada kombinasi (10 ml air kelapa + 90 ml air cucian beras dan perendaman 6 jam). Jumlah akar paling banyak terdapat pada kombinasi (50 ml air kelapa + 50 ml air cucian beras dan perendaman 6 jam).
Infeksi Jamur Dermatofita Pada Penderita Mikosis Kuku Winda Irawati Zebua; Kiki Nurtjahja; Sartini Sartini
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 3, No 1 (2021): Mei 2021
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v3i1.539

Abstract

Dermatophytes are a group of fungi that cause nail abnormalities. This study aims to determine dermatophyte fungal infections in patients with nail mycoses. The method used in this study is descriptive and the sample was taken by purposive sampling with the criteria of damaged toenails, with characteristics: nails are not shiny, brownish to black from the base to the tip then the nails are examined directly with 10% KOH and cultured using media Sabouraud Dextrose Agar (SDA). The fungi isolated on slanted agar containing SDA and each fungal species were then identified using preparations for microscopic examination. The results showed that from 30 samples, 8 (eight) nail samples were positive for dermatophytes, namely: 5 (five) people infected with the fungus Tricophyton mentagrophytes species, 2 (two) people infected with the Trichophyton rubrum fungus, and 1 (one) person infected with Epidermophyton floccosum..
Respon Fisiologis Pulutan (Urena lobata L.) terhadap Polusi Udara di Lingkungan Industri Winda, Winda; Kardhinata, Harso; Nurtjahja, Kiki; Fauziah, Ida
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 6, No 1 (2024): Mei
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v6i1.3960

Abstract

Air pollution, primarily originating from transportation and industrial activities, has become a major concern in the context of environmental health. This study aims to investigate the relationship between air pollution and the morphological characteristics of leaves as well as the stomatal density of the pulutan plant (Urena lobata L.) in polluted environments within the industrial area of Medan and unpolluted environments in Percut Sei Tuan, Medan, North Sumatra. The research method employed is ex-post facto with a laboratory approach to the polluted industrial area. Experimental results indicate that the stomatal density on pulutan leaves in the polluted area, specifically in the Industrial Zone of Medan, is 17.27/mm2, whereas in the unpolluted area, namely Percut Sei Tuan, it is 896.81/mm2. This difference provides insights into the negative impacts of air pollution on pulutan plants, highlighting the importance of maintaining air quality for ecosystem health and human well-being.
Potensi Bakteri Endofit dari Akar Kecombrang (Etlingera elatior (Jack) R. M. Smith) dalam Menghambat Pertumbuhan Staphylococcus aureus Lubis, Nurul Abdillah; Nurtjahja, Kiki; Rahmiati, Rahmiati; Susilo, Ferdinand
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 6, No 1 (2024): Mei
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v6i1.3959

Abstract

Endophytic bacteria are bacteria that live within plant tissues and are capable of producing secondary metabolites in the form of bioactive compounds similar to those produced by their host plants. This study aims to isolate and characterize endophytic bacteria from the roots of kecombrang (Etlingera elatior (Jack) R. M. Smith) and to test their ability to inhibit the growth of Staphylococcus aureus. The research was conducted using a quantitative descriptive method through several stages, including sample preparation, sterilization of equipment and media, isolation, characterization, and testing. The results identified three isolates of endophytic bacteria from the roots of kecombrang, namely AK1, AK2, and AK3, which were shown to be gram-positive cocci. Inhibition tests indicated that these endophytic bacteria exhibit antagonistic properties against Staphylococcus aureus. The isolate coded AK1 had an inhibition zone of 9.6 mm, AK2 had the lowest inhibition zone of 6.6 mm, and AK3 had the largest inhibition zone of 13.5 mm.
Co-Authors Abdillah, Latifah Ningrum Agnes Dame Sinta Uli Berliani, Kaniwa Cut Fatimah Zuhra DAYAR ARBAIN DEDI PRIMA PUTRA DWI SURYANTO Elimasni Erman Munir Erni Jumilawaty Eryna Elfasari Rangkuti etti sartina siregar Ferdinand Susilo GINTA RIO Hesti Wahyuningsih Ida Fauziah Ida Fauziah, Ida Ira Wulan Dani Irene Banjarnahor Irene Banjarnahor, Irene Isnaini Nurwahyuni Jendri Mamangkey Julius Paolo Siregar Kardhinata, Harso Lisa Novita Arios Lubis, Nurul Abdillah Mashitah, Ulfa Masitta Tanjung Muhammad Yusuf Muhammad Yusuf Nasution, MHD. Fauzi Novi Malinda NUNUK PRIYANI Okky Setyawati Dharmaputra Putri, Mimmy Sari Syah Rahmiati Rahmiati Rahmiati Rahmiati Riska Annisa Putri Riyanto Riyanto Rizal Syarief Rosliana Lubis Rosliana Lubis, Rosliana Sartini Sartini Sri Dwi Hastuti Srimaulinda Srimaulinda Supriharti, Deny TATA BINTARA KELANA Winda Winda Winiati Pudji Rahayu Yurnaliza, Yurnaliza Zebua, Winda Irawati