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

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Isolasi dan Uji Bakteri Lipolitik dalam Mendegradasi Minyak Pada Limbah Cair Kelapa Sawit di Kebun Marihat, Pematang Siantar Chairunnisa Chairunnisa; Riyanto Riyanto; Abdul Karim
Jurnal Ilmiah Biologi UMA (JIBIOMA) Vol 1, No 2 (2019): November 2019
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.034 KB) | DOI: 10.31289/jibioma.v1i2.155

Abstract

Research on isolation and testing of lipolityc bacteria in oli degradation of palm oil mill efluent (POME) at Marihat, Pematang Siantar. This research was conduteted at the Bioproses Laboratory, Palm Oil Research Institute, Medan. The purpose of this study was to obtain lipolytic bacterial isolates and determine the ability of these lipolytic bacteria to degrade oil. Isolation of bacteria using a selective medium lipolytic. Data of the analysis that were 8 isolates of lipolytic bacteria in pallm oil mill effluent and the potential to degrade oil with index activity of lipolytic isolates. The higgest lipolityc isolate index with code BL-1 is 2,78, and the lowest lipolytic index BL-8 is 1,40.
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.
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 KIKI NURTJAHJA M.Yusri Dadan Nugraha Maisarah L. Gaol Muthiah Muthiah Nasution, Jamilah Nur Azlin Siregar Nurhaika br Hutajulu One May Sunday Nababan Rosliana Lubis Rosliana Rosliana Roswita Raya Hasibuan Sartini Sartini Srimaulinda Srimaulinda