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All Journal JBIO: jurnal biosains (the journal of biosciences) EduMatika: Jurnal MIPA
Mhd Yusuf Nasution
Universitas Negeri Medan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Immunology & microbiology Mathematics Medicine & Pharmacology Physics

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MORPHOLOGICAL CHARACTERISTICS OF TERRESTRIAL ORCHIDS IN THE FOREST OF BUKUM VILLAGE , SIBOLANGIT DISTRICT, DELI SERDANG REGENCY Dwi Indriany; Wina Dyah Puspita Sari; Yusran Efendi Ritonga; Mhd Yusuf Nasution
JBIO: jurnal biosains (the journal of biosciences) Vol 9, No 1 (2023): JBIO : Jurnal Biosains (The Journal of Biosciences)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jbio.v9i1.39148

Abstract

The study aims to determine the types of terrestrial orchids that exist in the Forest of Bukum Village, Sibolangit District, Deli Serdang Regency. This study uses an exploratory method. Orchid found identified and observed morphology from root to fruit. Type 15 species of orchids were found including Anoectochilus longicalcaratus J.J.Sm., Anoectochilus reinwardtii Blume, Calanthe triplicata (Willemet) Ames, Chrysoglossum ornatum Blume, Corymborkis veratrifolia (Rein.w) Blume, Cymbidium ensifolium (L.) Sw., Cystorchis stenoglossa Schltr, Habenaria sp, Hetaeria oblongifolia Blume, Liparis rheedei Lindl, Malaxis oculata (Rchb.f.) Kuntze, Malaxis ophrydis (J.Koenig) Ormerod, Phaius callosus (Blume) Lindl, Phaius corymbioides Schltr, Plocoglottis javanica Blume. 7 species of which have pseudobulbs.
TEST OF ANTIBACTERIAL ACTIVITY OF THE ETHANOL EXTRACT OF PULUTAN LEAVES (Urena lobata L.) AGAINST Escherichia coli Mhd Yusuf Nasution; Marlinda Nilan Sari Rangkuti; Dina Handayani; Tessa Togatorop; Agnes Adela Br Ginting; Ahmad Shafwan S Pulungan
JBIO: jurnal biosains (the journal of biosciences) Vol 9, No 2 (2023): JBIO : Jurnal Biosains (The Journal of Biosciences)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jbio.v9i2.48764

Abstract

ABSTRAK  Tessa Togatorop, NIM 4193520022, Uji Aktivitas Ekstrak Etanol Daun Pulutan Daun Pulutan (Urena lobata L.) Terhadap Bakteri Escherichia coli Dan Staphylococcus aureus. Penelitian ini bertujuan untuk mengetahui kandungan metabolit sekunder, uji aktivitas antibakteri ekstrak etanol daun pulutan (Urena lobata L.) dan untuk mengetahui uji Konsentrasi Hambat Minimum (KHM) dan uji Kosentrasi Bunuh Minimum (KBM) terhadap bakteri Escherichia coli dan Staphylococcus aureus. Uji skrining fitokimia dilakukan dengan beberpa pereaksi yang sesuai. Uji aktivitas antibakteri menggunakan metode difusi cakram terhadap bakteri Escherichia coli dan Staphylococcus aureus. Uji KHM dan KBM dilakukan dengan menghitung selisih nilai absorbansi setelah inkubasi dan sebelum inkubasi yang dapat menghambat dan membunuh bakteri uji. Hasil skrining fitokimia esktrak etanol daun pulutan mengandung; flavonoid, saponin, tanin, dan steroid/terpenoid. Hasil uji aktivitas antibakteri dengan metode difusi cakram ekstrak etanol daun pulutan 15%, 25%, 35%, 45%, 55% dan 65% terhadap bakteri Escherichia coli berturut-turut adalah 4,0625 mm, 4,2 mm, 4,85 mm, 3,075 mm, 4,5875 mm, dan 4,3 mm sedangkan pada bakteri Staphylococcus aureus berturut-turut adalah 2,5625 mm, 3,05 mm, 3,35 mm, 3,55 mm, 3,175 mm, dan 4,5 mm. Hasil penelitian menunjukkan ekstrak etanol daun pulutan memiliki aktivitas antibakteri terhadap bakteri Escherhicia coli dan Staphylococcus aureus dalam kategori yang lemah. Uji KHM pada bakteri Escherichia coli adalah konsentrasi 65% dan pada bakteri Staphylococcus aureus adalah konsentrasi 55%. Uji KBM pada bakteri Escherichia coli dan Staphylococcus aureus tidak didapat pada setiap perlakuan konsentrasi. Kata Kunci : Pulutan (Urena lobata L.), Antibakteri, Konsentrasi Hambat Kosentrasi Bunuh Minimum
ACTIVITY TEST OF ETHANOL EXTRACT OF Asystasia gangetica LEAVES AGAINTS Escherichia coli BACTERIA Ahmad Shafwan S Pulungan; Mhd Yusuf Nasution; Dina Handayani; Ade Yesi Yuliana
JBIO: jurnal biosains (the journal of biosciences) Vol 9, No 2 (2023): JBIO : Jurnal Biosains (The Journal of Biosciences)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jbio.v9i2.48760

Abstract

Daun Asystasia gangetica memiliki berbagai senyawa metabolit sekunder. Senyawa metabolit ini berpotensi menghambat pertumbuhan bakteri Escherichia coli. Tujuan dari penelitian ini adalah menguji aktivitas antibakteri ekstrak daun Asystasia gangetica terhadap bakteri Escherichia coli. Penelitian ini menggunakan metode maserasi dengan pelarut etanol pro analisis. Uji metabolit sekunder dilakukan dengan menggunakan pereaksi warna. Uji aktivitas antibakteri dilakukan dengan metode difusi cakram dengan 4 kali pengulangan terdiri dari konsentrasi 15%, 25%, 35%, 45%, 55% dan 65%. Kontrol positif yang digunakan dalam penelitian ini adalah ciprofloxacin dan kontrol negatif adalah pelarut etanol pro analasis. Uji metabolit sekunder menunjukkan bahwa daun Asystasia gangetica mengandung senyawa alkaloid, flavonoid, saponin, steroid, dan tanin. Uji aktivitas antibakteri menunjukkan bahwa ekstrak etanol daun Asystasia gangetica berpotensi dalam menghambat bakteri Escherichia coli. Kata Kunci: Asystasia gangetica, Antibakteri, Escherichia coli
Migratory birdwatchers' dress code: an analysis of clothing color choices on bird responses and behavior Yeza Sistia Haniva; Hamda Rofiqa; Mhd Yusuf Nasution; Khairiza Lubis; Widya Arwita
EduMatika: Jurnal MIPA Vol. 6 No. 1 (2026): EduMatika: Jurnal MIPA
Publisher : Lembaga Riset Mutiara Akbar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56495/emju.v6i1.1557

Abstract

This study aims to analyze the influence of observer clothing color on the responses and behavior of migratory birds during birdwatching activities. The method used was experimental field observation conducted in the Batubara Mangrove Park area, Historical Beach, by comparing two categories of clothing colors, namely bright colors and neutral colors. The research subjects focused on the migratory bird species Numenius madagascariensis, which is known to be sensitive to changes in the visual environment. Data were collected through direct observation of bird behavior, such as flight frequency, feeding activity, movement, and alertness level. The results showed that the use of bright clothing colors increased the birds' alertness response, characterized by increased frequency of movement and decreased foraging activity. Conversely, the use of neutral colors tended not to cause significant disturbance so that bird behavior remained natural. These findings confirm that clothing color selection is an important part of birdwatching ethics to minimize disturbance to animals and support research and conservation effectiveness.
Bioethical study on the utilization of empty fruit bunch waste in the palm oil industry (elaeis guineensis) from an environmental, social and economic perspective Affrina Firdayani; Frisky Septiani Simanjuntak; Putri Lestari Simbolon; Mhd Yusuf Nasution; Nurbaity Situmorang
EduMatika: Jurnal MIPA Vol. 6 No. 1 (2026): EduMatika: Jurnal MIPA
Publisher : Lembaga Riset Mutiara Akbar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56495/emju.v6i1.1559

Abstract

Oil palm empty fruit bunches (OPEFB) are one of the main solid biomass residues in the palm oil industry, accounting for approximately 20–25% of the total processed raw materials. Management of this waste is a strategic issue in supporting industrial sustainability, particularly from an environmental, social, and economic perspective. This study aims to analyze the bioethical dilemma in the utilization of OPEFB through a descriptive qualitative approach using field observation and literature review methods. The analysis was conducted by grouping findings based on environmental, social, and economic perspectives, and interpreted using bioethical principles such as responsibility, justice, and sustainability. The results indicate that OPEFB has significant potential as a value-added resource, such as organic fertilizer, bioenergy, biomaterials, and lignocellulose-based industrial products. This utilization provides benefits in waste reduction, community empowerment, and increased economic value. However, the bioethical dilemma arises from the imbalance between the industry's economic interests and environmental protection and community welfare. Therefore, sustainable OPEFB management is needed through the integration of environmental, social, and economic aspects based on bioethical principles to achieve ethical and sustainable industrial development.
Ethics of chicken husbandry: a philosophical and bioethical analysis of cleanliness and cage design Maftuh Alqadri Zega; Yohana Lasria Siahaan; Marisita Klakik; Nurbaity Situmorang; Mhd Yusuf Nasution
EduMatika: Jurnal MIPA Vol. 6 No. 1 (2026): EduMatika: Jurnal MIPA
Publisher : Lembaga Riset Mutiara Akbar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56495/emju.v6i1.1564

Abstract

This study aims to analyze the cleanliness and design of laying hen cages and their relationship to disease prevention and livestock welfare from an ethical and bioethical perspective. The method used was a descriptive study with direct observation and interviews conducted at a laying hen farm in Simalungun Regency, North Sumatra. Observed aspects included cage height, distance between chickens and manure, manure removal system, ventilation, and general cleanliness of the cage. The results showed that the cage conditions generally met good standards, with a cage height of approximately 2.5 meters, natural ventilation supporting air circulation, and cage cleanliness maintained through routine cleaning every three days. Adequate distance between chickens and manure and a low fly presence also indicated a relatively low risk of disease transmission. Furthermore, regular use of disinfectants helped control pathogenic microorganisms. From an ethical and bioethical perspective, the husbandry practices implemented reflect the farmer's moral responsibility to maintain animal welfare by providing a clean, healthy, and appropriate environment. However, this study is still limited to a single location and is descriptive in nature, so further research with a broader scope and a quantitative approach is needed.
Co-Authors Ade Yesi Yuliana Affrina Firdayani Agnes Adela Br Ginting Dwi Indriany Frisky Septiani Simanjuntak Hamda Rofiqa HANDAYANI, DINA Khairiza Lubis Maftuh Alqadri Zega Marisita Klakik Marlinda Nilan Sari Rangkuti Nurbaity Situmorang Pulungan, Ahmad Shafwan S Putri Lestari Simbolon Tessa Togatorop Widya Arwita Wina Dyah Puspita Sari, Wina Dyah Yeza Sistia Haniva Yohana Lasria Siahaan Yusran Efendi Ritonga