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Biocaster : Jurnal Kajian Biologi
Published by Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu
ISSN : 28083598     EISSN : 2808277X     DOI : https://doi.org/10.36312/biocaster
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology
Biocaster : Jurnal Kajian Biologi (B : JKB), focus to bridge the gap between research and practice, providing information, ideas and opinion, in addition to critical examinations of advances in biology research, teaching, and learning. Through the coverage of policy and curriculum developments, the latest results of research into the teaching, learning and assessment of biology are brought to the fore. Biocaster : Jurnal Kajian Biologi (B : JKB), receiving and publishing article in the form of research and review (scientific article) in the field of biology education and utilization of biological research in teaching and learning. Each article must be linked to the theme "21st century skills in biology education" and / or "Efforts to support the achievements of the goals set forth in the Sustainable Development Goals (SDGs) through biology education". All articles are published in English and under go a peer-review process. The scope of Biocaster : Jurnal Kajian Biologi (B : JKB), is focused on biology education research/review both in topics covered as well as disciplinary perspective : 1) Biology teaching and learning materials at all education levels; 2) Pure Research of Biology developed or studied to the sources, materials, or instructional media Biology (using the Research and Development paradigm/R&D); 3) Curriculum of Biology Education at all education levels; 4) Quasi-experiment, Class Action Research (CAR), and Lesson Study in Biology teaching and learning; 5) Other Qualitative Research of Biology Education; 6) Biology Learning Evaluation/Assessment; 7) Teacher Professional Issues/Trends in Biology Education; and 8) Environmental education.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 52 Documents
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Search results for , issue "Vol. 6 No. 1 (2026): January" : 52 Documents clear
Pengembangan Model Chatbot Asesmen untuk Membantu Siswa Menguasai Konsep Sistem Ekskresi Zairul, Amelia Savitri; Wulan, Ana Ratna
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.938

Abstract

This study aims to develop and evaluate the practicality and effectiveness of a tawk.to-based formative assessment chatbot integrated into Google Sites to support junior high school students' mastery of excretory system concepts. The study used the Research and Development (R&D) method with the ADDIE model and involved eighth-grade students at a public junior high school in Bandung City. Data were collected through pretest-posttest tests, practicality questionnaires, and the User Experience Questionnaire (UEQ). The results showed that the use of the formative assessment chatbot improved students' conceptual mastery with a moderate level of effectiveness. The chatbot was deemed highly practical, particularly in providing automated feedback, supporting concept mastery, and presenting questions based on higher-order thinking skills. However, several technical and visual aspects still require improvement. Overall, the formative assessment chatbot has the potential to be an effective and innovative support medium for biology learning by providing instant feedback and facilitating diagnostic assessments.
Analisis Faktor Internal Penyebab Kesulitan Belajar Ditinjau dari Motivasi Belajar dan Minat Belajar Latief, Sulastri; Hasan, Ani M.; Mustaqimah, Nur
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.954

Abstract

This study aims to analyze internal factors causing students' learning difficulties in biology, specifically from the perspective of motivation and interest. The study was conducted at SMA Negeri 2 Gorontalo, with 29 students in grades XI-3 in the 2025/2026 academic year as subjects. The method used was descriptive quantitative, with data collection techniques using questionnaires, observations, and interviews. The results showed that students' learning motivation was high, with an average percentage of 78%, while their learning interest was also high, with an average percentage of 79%. However, learning difficulties were still found in some students, influenced by low self-discipline and a lack of independent study habits outside of school hours. These findings indicate that high motivation and interest in learning are not fully accompanied by effective and consistent learning behaviors. Therefore, learning efforts are needed that focus not only on increasing motivation and interest but also on strengthening students' learning independence and discipline to minimize learning difficulties in biology.
Pengaruh Kombinasi Ekstrak Daun Keji Beling (Strobilanthes crispus) dan Daun Singkil (Premna corymbose Rottl. et Willd) terhadap Intensitas Serangan Serangga Hama pada Tanaman Terung Hijau (Solanum melongena L.) Miranda, Miranda; Lumowa, Sonja Verra Tinneke; Nasution, Ruqoyyah; Herliani, Herliani
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1007

Abstract

This study aims to determine the effect of the combination of keji beling leaf extract (Strobilanthes crispus) and singkil leaf (Premna corymbose Rottl. et Willd) on the intensity of insect pest attacks on green eggplant (Solanum melongena L.). The study used a Randomized Block Design (RBD) with five treatments, namely control (water) and a combination of extracts at concentrations of 25%, 40%, 55%, and 70%, each repeated five times. The extract was made by maceration method using water as a solvent and additional natural adhesive (3 g detergent). Application was carried out twice per week, and the intensity of insect pest attacks was observed on days 11, 25, 39, and 53 DAP. Data were analyzed using ANOVA and the Least Significant Difference (LSD) test at a significance level of 1%. The results showed that the combination of extracts had a very significant effect on the intensity of insect pest attacks (F count > F table). The 70% concentration gave the lowest attack intensity, which was around 15%. This combination of extracts has the potential to be an environmentally friendly botanical pesticide for controlling insect pests on green eggplant plants.
Pengaruh Beberapa Media Tanam terhadap Pertumbuhan Tanaman Cabai Rawit (Capsicum frutescens L.) Oktaviani, Jelita; Handayani, Dina; Nusyirwan, Nusyirwan
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1027

Abstract

This study aims to analyze the effect of a combination of soil, cocopeat, and rice husk charcoal on the vegetative and generative growth of cayenne pepper (Capsicum frutescens L.). This study was conducted at the Greenhouse, Medan State University, used a Completely Randomized Design (CRD) consisting of four treatments and six replications. The data obtained were analyzed using ANOVA, followed by Duncan's test at a 5% confidence level. The results showed that the combination of planting media significantly affected the growth and production of cayenne pepper (Capsicum frutescens L.). The soil + rice husk charcoal (3:1) treatment consistently produced the highest average for all observation parameters, including plant height, number of leaves, flowering time, number of fruits per plant and fruit weight per plant. The superiority of this media is related to the properties of rice husk charcoal which is able to increase aeration, and the ability to retain water, so it can affect healthy root development and nutrient absorption, especially phosphorus (P) which is very important for fruit formation. Thus, the combination of soil and rice husk charcoal (3:1) is the most effective treatment for increasing the productivity of cayenne pepper (Capsicum frutescens L.).
Pengaruh Pupuk Kandang Ayam terhadap Pertumbuhan dan Produksi Tanaman Kacang Panjang (Vigna cylindrica L.) Mustaqim, Adnan; Handayani, Dina; Nusyirwan, Nusyirwan
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1032

Abstract

This study aims to analyze the effect of various doses of chicken manure on the growth and yield of long bean plants (Vigna cylindrica L.). The experimental design used was a Completely Randomized Design (CRD) with four treatments and six replications. Treatments consisted of A (control without fertilizer), B (0.5 kg chicken manure), C (1 kg chicken manure), and D (1.5 kg chicken manure). The variables observed included plant height, number of leaves, number of branches, number of pods, pod length, and fresh pod weight at 14, 28, and 42 Days After Planting (DAP). This study was conducted at the Greenhouse, Department of Biology, State University of Medan. The time of this study was from July to September 2025. The results of the Analysis of Variance (ANOVA) showed that the application of chicken manure had a very significant effect (p<0.05) on all parameters of plant growth and yield. Further DMRT testing results demonstrated that treatment D (1.5 kg of chicken manure) consistently produced the highest yields and significantly differed from the other treatments across all observation phases. It can be concluded that applying 1.5 kg of chicken manure per plot is the optimal dose, significantly increasing vegetative growth and yield of long beans.
Pengaruh BAP (Benzil Amino Purine) dan Ekstrak Tauge (Phaseolus aureus) terhadap Multiplikasi Tanaman Nilam (Pogostemon cablin Benth.) Secara In Vitro Hutagaol, Aprinia; Edi, Syahmi
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1034

Abstract

Patchouli (Pogostemon cablin Benth.) is a promising export commodity, so techniques such as tissue culture are needed to increase its production. This study aims to determine the effect of BAP (Benzyl Amino Purine) and bean sprout extract (Phaseolus aureus) on the multiplication of patchouli (Pogostemon cablin Benth.) in vitro. This study used a factorial Completely Randomized Design (CRD) with 4 levels of BAP concentration (0 ppm, 0.5 ppm, 1 ppm, 1.5 ppm) and 3 levels of bean sprout extract concentration (0%, 12%, 15%), each treatment was repeated 3 times. Data analysis used ANOVA and further testing with 5% DMRT test. The results showed that the administration of BAP significantly affected the increase in the number of shoots, leaves, and roots. BAP concentration of 0.5 ppm gave the best results on the growth of shoots and leaves, but the treatment without BAP actually produced the best growth in the number of roots. The combination of BAP and bean sprout extract significantly affected the number of shoots and leaves. The combination of 0.5 ppm BAP and 15% bean sprout extract produced the highest number of shoots and leaves, producing 2.92 shoots and 4.28 leaves. The interaction between BAP and bean sprout extract creates natural auxin and synthetic cytokinin hormones derived from BAP, which maintain hormonal balance to support patchouli growth.
Identifikasi Cemaran Mikroplastik pada Ikan Nila (Oreochromis niloticus) dan Ikan Puyau (Osteochilus vittatus) di Perairan Waduk Benanga, Samarinda Ramadhan, Yasmin Athirah; Masitah, Masitah; Nasution, Ruqqoyah; Serena, Nelda Anasthasia
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1035

Abstract

Benanga Reservoir in Samarinda serves as a water source, river conservation area, and fishery location that supports local subsistence and commercial activities. However, the suboptimal management of plastic waste around Benanga Reservoir increases the risk of microplastic pollution that threatens human health and food security through fish consumption. This study aims to identify the types and amounts of microplastic contamination in Tilapia (Oreochromis niloticus) and Puyau (Osteochilus vittatus) in Benanga Reservoir waters. The research method is quantitative-descriptive exploratory. Fish samples were taken by purposive sampling method at 4 station points using a net (gillnet), the gills and digestive tract were destroyed using 10% KOH and flotation with 0.9% NaCl to be observed using a light microscope with the help of optilab viewer. Data were analyzed using descriptive statistics. Analysis of 12 fish samples showed the presence of microplastic contamination in all samples with a total of 155 particles including fiber, film, fragment, and pellet forms with various colors and sizes. The average abundance of tilapia is 11.4 particles/tail, while in puyau fish it reaches 14 particles/tail. Cumulatively, the level of microplastic contamination in puyau fish (98 particles) was identified as higher than in tilapia (57 particles), with fiber particles predominating in both species. The presence of microplastics in this local fish population emphasizes the urgency of waste management and pollution mitigation to ensure food security and ecosystem integrity in the Benanga Reservoir.
Persebaran Tumbuhan Obat Sipaet dan Dadap Serep di Kabupaten Tapanuli Utara Menggunakan Model MaxEnt Simamora, Handika Ananda Pudan; Restuati, Martina
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1037

Abstract

Indonesia has great potential in the utilization of traditional medicinal plants, including Sipaet (Tithonia diversifolia) and Dadap Serep (Erythrina subumbrans) which have been used for generations by the people of North Tapanuli Regency. However, data information related to the spatial distribution and ecological existence of these two species is not yet systematically available. This descriptive-exploratory study with a spatial quantitative approach aims to map the spatial distribution, predict the potential existence of Sipaet (Tithonia diversifolia) and Dadap Serep (Erythrina subumbrans) medicinal plants in North Tapanuli Regency. The analysis uses the Maximum Entropy (MaxEnt) model version 3.4.4. The model accuracy is validated using the Area Under the Curve (AUC) value. Based on the results of the Species Distribution Modeling (SDM) analysis using MaxEnt, it shows that Tithonia diversifolia has a high habitat suitability (0.7-0.9), and its distribution is most dominantly influenced by seasonal rainfall and solar radiation, with a model accuracy level classified as good (AUC = 0.812). Meanwhile, Erythrina subumbrans showed moderate to low habitat suitability (0.4-0.6), influenced by average monthly temperature and solar radiation, but with low to moderate model accuracy (AUC = 0.612).
Analisis Kandungan Fitokimia dan Aktivitas Antioksidan Daun Ciplukan (Physalis angulata L.) Berdasarkan Ketinggian Tempat Tumbuh Marpaung, Rivaldi Ariansah; Edi, Syahmi
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1040

Abstract

This study aims to analyze the differences in secondary metabolite content and antioxidant activity in the extract of ground cherry leaves grown in two locations with different altitudes. This study was designed with a descriptive experimental study. The research parameters carried out in the study were secondary metabolite compounds resulting from GC-MS (Gas Chromatography-Mass Spectrometry) analysis and IC50 values ​​were measured using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The results showed differences in the content of secondary metabolite compounds and IC50 values ​​of antioxidant activity based on the altitude of the growing place. The extract of lowland ground cherry leaves (Kisaran) produced 13 compounds with a tendency towards carbohydrate/sugar derivatives, such as Melezitose. Meanwhile, the extract of highland leaves (Parongil) produced 11 compounds with a tendency towards alkane derivatives, including Phytol. There was no difference in antioxidant activity influenced by the part of the plant and the altitude of the growing place. The Kisaran ground cherry leaf extract with an IC50 value of 54.46 ppm and the Parongil ground cherry leaf extract with an IC50 value of 98.82 ppm are included in the strong antioxidant activity category. Meanwhile, the Kisaran ground cherry fruit extract with an IC50 value of 120.38 ppm and the Parongil ground cherry fruit extract with an IC50 value of 127.65 are included in the moderate antioxidant activity category.
Pengaruh Pemberian Pupuk Urea dan Pupuk Organik Cair (POC) Batang Pisang terhadap Pertumbuhan dan Hasil Tanaman Pakcoy (Brassica rapa L.) Simanjuntak, Maretta Indah Sari; Suriani, Cicik
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1050

Abstract

Fertilization plays an important role in increasing plant growth and yield. This study aims to analyze the effect of urea fertilizer and liquid organic fertilizer (POC) of banana stems on the growth and yield of pakcoy (Brassica rapa L.). The study was conducted in Serdang Village, Beringin District, Deli Serdang Regency, from January to August 2025 using a 4x4 factorial randomized block design (RAK) with two replications. The treatments consisted of urea doses (0, 4, 5, and 6 g/polybag) and banana stem POC concentrations (0, 60, 70, and 80 mL/L). The parameters observed included plant height, number of leaves, leaf area, total fresh weight, and root weight. Data were analyzed using two-way ANOVA and DMRT test at the 5% level. The results showed that urea fertilizer had a very significant effect on all parameters, while banana stem POC had a significant effect on most growth and yield parameters. The interaction of the two treatments had a significant effect on several parameters. The combination of 6 g urea per polybag and 80 mL/L of fertilizer-free organic fertilizer (POC) yielded the best results, while the treatment without fertilizer yielded the lowest. The combination of urea and banana stem fertilizer proved effective in increasing the growth and yield of pakcoy.

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