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All Journal JBIO: jurnal biosains (the journal of biosciences) BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Jurnal Ilmiah Biologi UMA (JIBIOMA) JURNAL BIOLOGI PAPUA
Riyanto Riyanto
Universitas Medan Area
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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PENGARUH AIPengaruh Air Rebusan terhadap Kualitas Ikan Kembung Rebus (Rastrelliger sp.)aR REBUSAN TERHADAP KUALITAS IKAN GEMBUNG REBUS (Rastrelliger sp) M.Yusri Dadan Nugraha; Riyanto riyanto; Hanifah Mutia Z.N Amrul
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 1, No 1 (2019): Mei 2019
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.754 KB) | DOI: 10.31289/jibioma.v1i1.140

Abstract

The research on bacterial testing on boiled water of boiled mackerel (Rastelliger sp) has been conducted. The study applied treatment of boiled water that is not replaced and is used continuously in several stages. This study aims to determine the effect of boiled water on the quality of fish production, and determine its effect on meat tectrus, gill color, and aromas. The study was conducted with a descriptive qualitative method. Boiled mackerel quality is measured using the total plate count method, which is to count the number of bacterial colonies in the water before boiling and after boiling.
Isolasi dan Karakteristik Bakteri Endofit pada Akar Pepaya (Carica papaya L) Guspi Wilda Sari Sianipar; Sartini Sartini; Riyanto Riyanto
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 2, No 2 (2020): November
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v2i2.312

Abstract

Bakteri endofit adalah mikroorganisme yang seluruh atau sebagian hidupnya berada dalam jaringan tumbuhan (Akar, Batang, Daun, dan Bunga). Tujuan penelitian ini adalah untuk mengetahui karakteristik bakteri endofit pada akar pepaya (Carica papaya L) secara makroskopis dan mikroskopis. Penelitian ini menggunakan metode  deskriptif yang dilakukan dengan tiga tahapan yaitu prepasi sampel dan media, isolasi dan karakterisasi melalui uji biokimia. Hasil penelitian ditemukan 2 isolat bakteri endofit yang diberi kode AP1 dan AP2. Pewarnaan gram menunjukkan kedua isolat bakteri endofit berbentuk basil gram positif yang berwarna ungu. Dari hasil penelitian ini menunjukkan karakteristik morfologi dan uji biokimia isolat bakteri endofit diduga merupakan genus Bacillus.
Jenis Tumbuhan Obat yang Dimanfaatkan Untuk Pasca Melahirkan Oleh Etnis Melayu Di Tanjung Pura Kabupaten Langkat, Sumatera Utara Bela Yustika; Jamilah Nasution; Riyanto Riyanto
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 4, No 1 (2022): Mei 2022
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v1i1.1225

Abstract

Medicinal plants come from natural ingredients and are passed down from generation to generation. Ethnic Malay is one of the tribes who use plants for postnatal treatment. This study aims to identify the types of plants found in postpartum treatment by the Malay tribe in Tanjunpra, Langkat Regency, North Sumatra. The method used is descriptive qualitative and quantitative with emic and ethical approaches. In collecting sample data, we used the interview method and the selection of informants by means of "purpose sampling and snowball sampling". From the results of the investigation, found 40 types of medicinal plants spread over 23 families. Most species came from the ginger family (9 species) and the Rutaceae family (3 species). The part of the plant that is most often used as postnatal medicine is the rhizome, leaves and fruit. Most of the crops are cultivated by the community, so they are mainly used in the fields.
Kajian Etnobotani Tumbuhan Obat Etnis Batak Toba di Desa Sipituhuta Kecamatan Pollung, Kabupaten Humbang Hasudutan, Sumatera Utara Jamilah Nasution; Riyanto Riyanto; Maisarah L. Gaol
Jurnal Biologi Papua Vol 13, No 2 (2021)
Publisher : Jurusan Biologi FMIPA Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (170.779 KB) | DOI: 10.31957/jbp.1646

Abstract

The high potential of medicinal plants in Sipituhuta Village can make it easier for people to use these plants for daily needs especially for traditional medicine. This study aims to determine the type of plants that have medicinal properties according to the Toba Batak ethnic in Sipituhuta Village. Methodology used for this study was observation and sample collectioned. Sample was collected based on the interview to local community. The data collected were analyzed descriptively. The results revealed that 40 species from 21 families of plants that contain medicinal properties. The most widely use parts were leaves (20 species or 49%), rhizomes (5 species or 12%); tubers, fruits, stems (3 species or 7% respectively); sap and seeds (1 species or 2%).  Key words: medicinal plants; traditional medicine; Toba Batak. 
Analisis Kualitas Fisik Hand sanitizer Ekstrak Serai dan Cengkeh Serta Kemampuannya dalam Menghambat Pertumbuhan Staphylococcus aureus Diana Sari; Abdul Karim; Faisal Amri Tanjung; Riyanto Riyanto
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 5, No 1 (2023): Mei 2023
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v5i1.1653

Abstract

Hand sanitizer is an antiseptic substance that can be used to clean hands. To reduce the chemical content in Hand sanitizers, by using natural ingredients that contain antimicrobial ingredients. The natural ingredients used in this study were lemongrass and cloves. The purpose of this study was to determine the physical quality (organoleptic, homogeneity), phytochemical content and effectiveness of lemongrass and clove extracts against Staphylococcus aureus bacteria. This study uses an experimental laboratory research method where the data obtained in the observations are presented in the form of quantitative descriptive analysis with concentrations of 0%, 25%, 50%, 75%, 100% in 5 days, 7 days and 10 days of fermentation. The results of the organoleptic test got the results of color, shape and liquid texture, the results of the homogeneity test were that there were still coarse grains on the Hand sanitizer. The results of the phytochemical content of lemongrass and clove extracts are flavonoids and tannins. The results of the effectiveness test showed that lemongrass and clove extracts were able to inhibit Stahpylococcus aureus bacteria in 5 days, 7 days and 10 days of fermentation. The largest inhibition zone was found in  the 7-day fermentation with 100% concentration of 0.86 mm.
Etnobotani Tumbuhan dalam Upacara Pernikahan dan Mengayunkan Anak pada Masyarakat Melayu di Kecamatan Kualuh Leidong, Sumatera Utara Yayuk Asmiah; Jamilah Nasution; Abdul Karim; Riyanto Riyanto
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 8, No 1 (2026): Mei 2026
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v8i1.7088

Abstract

The Malay community utilizes various plant species in traditional ceremonies as part of cultural heritage passed down through generations. This study aimed to identify the plant species, plant parts used, and their cultural significance in wedding and child cradle ceremonies among the Malay community in Kualuh Leidong District, North Sumatra, Indonesia. A descriptive qualitative method was employed through observation, interviews, and documentation, with informants selected using purposive sampling. The study recorded 36 plant species belonging to 19 families used in both ceremonies. Fruits were the most frequently utilized plant parts (39%), followed by seeds (18%), leaves (15%), rhizomes (12%), tubers (9%), and stems and flowers (6% each). Plants were used as food ingredients, cooking spices, and ritual materials, particularly in the tepung tawar ceremony. Common ceremonial dishes included sweet rice, yellow rice (bale-bale), preserved sweets, nasi ulam, rendang, semur, pickles, and fermented soybean paste (tauco). Beyond their practical functions, these plants also hold symbolic meanings related to blessings, gratitude, hopes, and the cultural identity of the Malay community.
Etnobotani Tumbuhan Pangan pada Upacara Pernikahan Adat Simalungun Ropianza Purba; Jamilah Nasution; Rahmiati Rahmiati; Riyanto Riyanto
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 8, No 1 (2026): Mei 2026
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jibioma.v8i1.7101

Abstract

The use of food plants in traditional ceremonies represents a form of local knowledge that reflects the close relationship between communities and the biological resources in their environment. Among the Simalungun ethnic community, various food plants are still utilized in traditional wedding ceremonies; however, scientific documentation regarding their use remains limited. This study aimed to identify the food plant species used in Simalungun wedding ceremonies, determine the plant parts utilized and their sources, and explore their cultural significance. The research was conducted in Silimakuta District, Simalungun Regency, North Sumatra, using a qualitative descriptive approach through observation, interviews, and documentation involving 36 purposively selected informants. The results revealed that 24 food plant species belonging to 13 families were used in the ceremonies. The most frequently utilized families were Zingiberaceae and Liliaceae. The plant parts used included fruits (25%), tubers (21%), seeds (17%), rhizomes (12.5%), leaves (12.5%), stems (8%), and flowers (4%). Food plants were obtained from farmlands (46%), traditional markets (46%), and home gardens (8%). Traditional dishes such as dayok nabinatur and ikan mas arsik carry symbolic meanings related to harmony, togetherness, and the cultural identity of the Simalungun people. This study demonstrates the important role of food plants in preserving cultural traditions and local ethnobotanical knowledge.
Co-Authors Abdul Karim Bela Yustika Chairunnisa Chairunnisa Dewi Nur Anggraeni Diana Sari Dita Sari Emmy Harso Kardhinata Faisal Amri Tanjung Guspi Wilda Sari Sianipar Hanifah Mutia Zaida Ningrum Amrul Indah Sinaga Jamilah Nasution KIKI NURTJAHJA M.Yusri Dadan Nugraha Maisarah L. Gaol Muthiah Muthiah Nur Azlin Siregar Nurhaika br Hutajulu One May Sunday Nababan Rahmiati Rahmiati Ropianza Purba Rosliana Lubis Rosliana Rosliana Roswita Raya Hasibuan Sartini Sartini Srimaulinda Srimaulinda Yayuk Asmiah