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Jurnal Pembelajaran dan Biologi Nukleus
Published by Universitas Labuhanbatu
ISSN : 24429481     EISSN : 26857332     DOI : https://doi.org/10.36987/jpbn
Core Subject : Science, Education, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media
Jurnal Pendidikan Biologi merupakan jurnal elektronik yang merupakan wadah penerbitan artikel penelitian original yang terkait dengan penelitian pendidikan biologi. Jurnal ini dikelola oleh Program Studi Pendidikan Biologidibawah naungan LPPM Universitas Labuhanbatu. Jurnal ini diterbitkan dua kali dalam setahun pada bulan Maret dan September. Jurnal ini menyajikan hasil penelitian dibidang Pendidikan Biologi dan sains Biologi.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 437 Documents
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Integrating STEM Approach through a Student Worksheet to Strengthen Problem-Solving on the Excretory System Learning Saragih, Deva Herdina; Jayanti, Ummi Nur Afinni Dwi
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 3: Jurnal Pembelajaran Dan Biologi Nukleus September 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i3.8155

Abstract

Background: The 2022 PISA assessment reveals that Indonesian students demonstrate considerably weak science problem-solving abilities, achieving merely 383 points compared to the OECD's 485-point benchmark, with this deficiency particularly pronounced in biology education where learners encounter difficulties comprehending and contextualizing concepts such as the excretory system in practical scenarios. Methodology: Employing a 4D developmental framework (Define, Design, Develop, Disseminate) truncated at the Develop phase, this investigation created a STEM-integrated student worksheet designed to strengthen problem-solving competencies among eleventh-grade pupils, utilizing expert validation, stakeholder feedback surveys, and pre-post assessment protocols analyzed through percentage calculations, N-Gain coefficients, and paired-samples t-testing. Findings: The intervention demonstrated exceptional validity with 90% expert approval ratings across content and pedagogical dimensions, exhibited strong practicality reflected in 88.71% positive educator-student reception, and yielded statistically significant learning gains as evidenced by paired t-test results (p < 0.05) alongside a substantial N-Gain value of 0.75. Contribution: This study provides specific empirical evidence that a STEM-integrated student worksheet, developed through an adapted 4D model, effectively strengthens eleventh-grade students’ science problem-solving abilities in the excretory system Learning. The results further contribute to the field by establishing this worksheet as a valid, practical, and statistically proven instructional alternative that aligns with competency-based demands and improves analytical reasoning more effectively than conventional learning materials
Morphological Diversity of Endophytic Bacteria Peppermint (Mentha Piperita L.) Ardiansyah, Rangga; Sapitri, Sartika Wati Dwi; Dzakwan, Muhammad Naufal; Thalib, Nisa Muhammad; Thamara, Monika; Maharani, Lia Putri; Wibowo, Risky Hadi; Sipriyadi, Sipriyadi; Darwis, Welly
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.6683

Abstract

Background: The peppermint plant (Mentha piperita L.) is a type of medicinal plant that is widely found in temperate regions, especially Europe, North America and Africa. This plant contains essential oils, menthol, and menthone, menthafuran, sesquiterpenes, triterpenes, flavonoids, carotenoids, tannins and various minerals are also widely contained in peppermint leaf oil (M. piperita L.). The purpose of this study was to isolate and determine the morphological diversity of endophytic bacteria from peppermint plants (M. piperita L.). Methodology: The method used in this study is to take isolation samples, pure culture, characterization and gram staining to determine whether it includes gram-negative or positive bacteria. The results of the study of 12 cultures of endophytic bacterial isolates from plants (M. piperita L.) were taken 10 isolates from each different culture media. Findings: The results of morphological observations of bacterial colonies show diverse characteristics in terms of surface, appearan, ceelevation, edges, and colour. Gram Staining Test of Endophytic Bacterial Isolates from the roots, leaves, and stems of mint plants against endophytic bacteria showed that there were gram-positive and gram-negative bacterial isolates. Then the results of bacterial cell shape morphology have a diversity of Cocobacil, Coccus, and Bacil forms so it can be concluded that endophytic bacterial isolates from peppermint plants (M. piperita L.) have varied morphological diversity. Contribution: Data on the morphological diversity of endophytic bacteria from M. piperita L. provides important basic data for further research on the potential of M. piperita L. endophytic bacteria
Improving High School Students’ Problem-Solving Skills in Ecosystem Learning through Problem-Based Learning Supported Instructional Videos Oktaviani, Putu Meta; Pratiwi, Sindy; Tendrita, Miswandi; Kaliu, Sutriani; Ernawati, Ernawati
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.8420

Abstract

Background: Problem-Based Learning (PBL) has been shown to enhance higher-order thinking skills; however, its implementation still predominantly relies on worksheets, printed modules, or static media, which have not comprehensively facilitated all stages of the PBL process. Preliminary observations at senior high school (SMA Negeri 1 Toari and SMA Negeri 1 Latambaga) revealed that more than 60% of students experienced difficulties in identifying problems, and only about 35% were able to systematically formulate problem-solving strategies. Methodology: A Research and Development (R&D) approach based on the ADDIE framework was adopted in this study, encompassing the stages of analysis, design, development, implementation, and evaluation. Information was obtained through classroom observations, semi-structured interviews, expert validation procedures, as well as questionnaires administered to teachers and students to capture their responses. Findings: The results demonstrated that the instructional media developed in this study attained a validity index of 87.5%, which was classified as highly valid, while its practicality reached 90%, placing it within the highly practical category. Furthermore, the effectiveness analysis conducted using the Wilcoxon Signed-Rank Test produced a significance value of 0.000 (< 0.05), thereby confirming the effectiveness of the media in enhancing students’ problem-solving abilities. Contribution: The findings indicate that the PBL-based instructional video developed in this research was both feasible and effective in improving students’ understanding of problem-solving skills. The innovative contribution of this study is reflected in the instructional design of the video, in which learners are systematically directed through each phase of the PBL framework to facilitate the development of problem-solving abilities within biology learning
Viability of Vanda limbata Orchid Seeds With Diferent Storage Period in Organic Tomato Extract Media Dewi, Ni Putu Yuni Astriani; Sele, Yunawati; Luruk, Theresia Oriyanti
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.8199

Abstract

Background: Orchid propagation using seeds is very difficult to develop conventionally, because orchid seeds do not have endosperm. Research regarding the shelf life of orchid seeds is important as an effort to determine the viability/ability of orchid seeds to germinate. Propagation through tissue culture techniques with shelf life of seeds is one of the conservation and multiplication efforts of horticultural plants. This research aims to determine the germination ability of Vanda limbata orchid seeds stored for different periods of time through the development phases of Vanda limbata orchid embryos. Methodology: This research used a Completely Randomized Design with three treatments, namely fresh orchid seeds, orchid seeds stored for 1 week and orchid seeds stored for 3 weeks with each treatment having 5 replications. This research using organic tomato extract media as a natural growth regulator. Findings: The results of the research showed that V. limbata orchids planted fresh (P1) experienced growth and development until they reached phase 6 (Short Apical Meristem (SAM) was detected and were green), and during the 1 week storage period they reached phase 5 growth and development (the size of the embryo was round, enlarged and green), whereas seeds stored for 3 weeks only experienced growth and development reaching phase 3 (the embryo was round or oval, the testa was still white and had no testa). the three treatments orchid seeds that were planted directly without the seed storage process experienced faster seed germination than seeds that were stored for 1 or 3 weeks.  Contribution:  This research has an important contribution to ex situ orchid conservation
Exploration of Endophytic Bacteria from Rice Roots as a Biocontrol Agency for Leaf Blight Disease in Vitro Maulidia, Vina; Agustinur, Agustinur; Siregar, Mawaddah Putri Arisma; Weihan, Rayhan Amadius
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.8113

Abstract

Background: Endophytic bacteria live within plant tissues without causing disease symptoms and possess strong potential as biocontrol agents through the production of antimicrobial compounds such as bacillomycin, iturin, siderophores, hydrogen cyanide, chitinase, glucanase, protease, and volatile compounds like acetoin, 2,3-butanediol, and H₂S. These metabolites can inhibit leaf blight pathogens, including Xanthomonas oryzae. The prolonged use of chemical pesticides has caused pathogen resistance, environmental harm, and health risks, highlighting the need for eco-friendly biopesticides. Endophytic bacteria provide a sustainable alternative by suppressing pathogens through competition, biofilm formation, and inducing plant resistance. This study aims to explore the potential of endophytic bacteria isolated from rice roots as biocontrol agents against leaf blight pathogens in vitro. Methodology: Endophytic bacteria were isolated from healthy 40 days rice plants in Pajar Village, Darul Hikmah District, Aceh Jaya Regency Aceh Province. Isolation and purification were carried out using the streak plate technique, followed by macroscopic and microscopic characterization. Antagonistic ability was evaluated through the well diffusion method, and the effects of selected isolates on seed vigor and viability were assessed. Findings: A total of 25 isolates were successfully obtained, exhibiting macroscopic and microscopic diversity. Seven isolates inhibited pathogen growth by forming clear zones, with isolate AJY07 showing moderate inhibition (10 mm). These seven isolates (AJY04, AJY06, AJY07, AJY09, AJY11, AJY23, and AJY24) also enhanced seed vigor and viability and reduced infection during germination by 10–20% compared to controls. Contributions: The findings demonstrate the potential of selected endophytic bacteria as environmentally friendly biopesticides to support the development for sustainable rice cultivation
Distribution Pattern and Population Density of Spodoptera frugiperda (Lepidoptera: Noctuidae) in Corn Fields in the Tanggunggunung Hills, Tulungagung Regency Nugroho, Tito Ridho; Windriyanti, Wiwin; Rahmadhini, Noni
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.8376

Abstract

Background: Corn is an important commodity in Tulungagung Regency; however, infestations of Spodoptera frugiperda have caused substantial yield losses, particularly during the vegetative growth stage, with reported damage levels reaching 20–70% depending on infestation intensity. Understanding the population density and spatial distribution of this pest under local agroecosystem conditions is therefore essential for developing effective control strategies. This study aimed to analyze the population density, distribution pattern, and environmental relationships of S. frugiperda on corn plants in the hilly area of Tanggunggunung, Tulungagung Regency. Methodology: The research was conducted on corn plants aged 15 to 45 days post-planting at two distinct locations: Ngrejo Village (approximately 110 meters above sea level) and Jengglungharjo Village (approximately 145 meters above sea level), each encompassing an area of 25 square meters. A two-dimensional sampling method was employed, utilizing 10 fixed observation plots per field, with observations occurring every three days. The variables observed included pest population density, symptoms of pest attack, and abiotic environmental factors such as temperature and humidity. Distribution patterns were analyzed using the Morisita index and the degree of Morisita (Ip), while the relationships between pest populations and environmental factors were examined through Pearson’s correlation analysis. Findings: The population of S. frugiperda in Ngrejo village exhibited a random distribution pattern (Id= 1.016; Ip= 0.004), whereas in Jengglungharjo village, it demonstrated a tendency towards clustering (Id = 0.211; Ip= 0.456). The density of the pest population showed a strong positive correlation with temperature (r= 0.799 to 0.702) and a negative correlation with humidity (r= −0.661 to −0.423). Contribution: Microclimatic conditions play a key role in shaping the spatial distribution and population density of S. frugiperda, highlighting the importance of site-specific, ecology-based pest management to improve corn productivity in hilly agroecosystems
Effectiveness of Annona muricata Leaf Extract as a Biopesticide Against Strepsicrates sp. in Eucalyptus pellita Seedlings Syafi’ah, Zahra’; Mardhiansyah, Muhammad; Pebriandi, Pebriandi
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.7267

Abstract

Background: Industrial forest plantations, particularly Eucalyptus pellita, are widely cultivated for pulp and paper production. However, nurseries of E. pellita, including those in the R&D facilities of PT Arara Abadi, are frequently infested by pests such as Strepsicrates sp. Synthetic pesticides are commonly applied to manage these infestations, although their use may pose risks to the environment. As an alternative, botanical pesticides derived from Annona muricata leaf extract have gained attention. Therefore, this study aimed to evaluate the effectiveness of A. muricata leaf extract in controlling Strepsicrates sp. and to determine its optimal concentration for application in E. pellita nurseries. Methodology: The experiment employed a completely randomized design (CRD) consisting of four treatments with five replicates. Data were analyzed using Duncan’s New Multiple Range Test (DNMRT) at a 5% significance level. The treatments consisted of concentrations of 10 g/L, 20 g/L, 30 g/L, and 40 g/L. Observed parameters included room temperature, relative humidity, time to initial mortality, time to 50% mortality, daily mortality rate, and total mortality. Findings: A. muricata leaf extract was effective in controlling Strepsicrates sp. on E. pellita. The results indicated that the optimal concentration was 40 g/L, resulting in the shortest initial mortality time of 5.2 hours, a median lethal time (LT₅₀) of 22.58 hours, and  a total mortality rate of 100%. Contribution: The findings of this study indicate that A. muricata leaf extract at a concentration of 40 g/L has strong potential for application as an environmentally friendly, effective, and sustainable botanical pesticide, supporting integrated pest management in E. pellita nurseries and reducing reliance on synthetic chemicals
Descriptive Study of Waste Generation and Management in the Joint Lecture Building State University of Malang Wijayadi, Imam; Salim, Fitrah Amalia; Adawiyah, Rabiatul; Rochmah, Azizah Nur; Suhadi, Suhadi; Al-Muhdhar, Mimien Henie Irawati
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.7108

Abstract

Background: The State University of Malang has substantial potential for solid waste generation due to the high density of academic activities. Although general estimates of waste volume are available, detailed data on waste characteristics and composition within campus facilities remain limited. This study aims to quantify waste generation at the food courts of the A19 and A20 Joint Lecture Buildings, evaluate existing waste management practices, and assess the potential for recyclable waste utilization. Methodology: A quantitative descriptive approach was applied. Waste generation measurements were conducted in accordance with the Indonesian National Standard SNI 19-3964-1994 by analyzing waste production and composition over eight consecutive days. Average waste generation per seat, waste volume, and specific gravity were calculated, and waste materials were classified based on their characteristics and sources. Findings: The results indicate daily variations in waste generation, with average rates of 0.14 kg/seat/day at Food Court A19 and 0.07 kg/seat/day at Food Court A20. The dominant waste fractions were paper, plastic, and food waste, reflecting consumption patterns within the study area. Variations in waste volume were associated with fluctuations in academic activities and food service operations. Organic waste shows potential for eco-enzyme production and takakura composting, while paper and plastic waste may be managed through structured collection programs. Contribution:  This study provides site-specific empirical data on waste generation rates and composition within a higher education campus, supporting data-driven improvements in campus-scale waste management strategies
Xanthin Oxidase Activity of Acetone Extract from Cinnamomum burmannii (Nees & T. Nees) Blume. as an Antigout Agung, Yoki Permana; Rahwal, Sultan; Ramadani, Suci Indah; Ismed, Friadi; Arifa, Nurwahidatul
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.8502

Abstract

Background: Cinnamomum burmannii commonly referred to as Indonesian cinnamon, belongs to the Lauraceae family and is recognized for its substantial economic and pharmacological significance. The bark is predominantly utilized as it is enriched with bioactive constituents, including cinnamaldehyde, eugenol, and coumarin, which are known to exhibit antioxidant, antibacterial, antifungal, antidiabetic, and anti-inflammatory properties. In purine metabolism, xanthine oxidase (XO) functions as a key enzyme by facilitating the oxidation of hypoxanthine into xanthine and subsequently into uric acid. Elevated XO activity has been associated with increased uric acid levels, leading to conditions such as hyperuricemia and gout. Accordingly, this study was conducted to assess the inhibitory potential of the acetone extract of C. burmannii against xanthine oxidase activity. Methodology: Dried and authenticated bark samples were macerated using acetone as the extraction solvent. Xanthine oxidase inhibition was evaluated invitro using a UV–Vis spectrophotometric assay at 295 nm. Various extract concentrations (0.370–23.684 µg/mL) were tested under controlled conditions (pH 7.6, 25 °C, xanthine as the substrate). The IC₅₀ values were determined by linear regression analysis, and the relative inhibitory concentration (RIC₅₀) was calculated in comparison with allopurinol. Findings: The acetone extract of C. burmannii exhibited potent xanthine oxidase inhibitory activity with an IC₅₀ of 21.029 ppm (compared to allopurinol, IC₅₀ 2.7 ppm), demonstrating the potential of acetone as a solvent for extracting bioactive compounds, with a RIC₅₀ value of  0.13 indicating higher activity than previously reported ethanol extracts. Contribution: These findings indicate that acetone provides better selectivity in extracting compounds from C. burmannii, resulting in stronger xanthine oxidase inhibition. The acetone extract may serve as a promising natural alternative source for the development of antigout agents
Molecular Docking Test of Procoagulant Compounds in Biwa Leaves (Eriobotrya japonica (Thunb.) Lindl.) Against Factor VIII Deficiency in The Genetic Disease Hemophilia-A Putri, Rahudatul; Idami, Zahratul
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.8163

Abstract

Background: The treatment of Hemophilia A remains chalenging, primarily the risk of inhibitor development and the high cost of recombinant Factor VIII treatment, necessitating the development of adjuvant therapeutic agents to enhance its effectiveness. This situation necessitates innovation in the form of developing adjunctive therapeutic agents aimed at improving the effectiveness and outcomes of existing therapies. Methodology: To address this need, this study was designed using an in silico virtual screening method with PyRx software and AutoDock Vina. All stages were conducted computationally, followed by molecular docking simulations to map the interactions and binding affinities between candidate compounds and the predetermined molecular target, von Willebrand factor Domain A3, in order to identify the most promising candidate compounds. Findings: The study successfully identified two compounds, namely Kaempferol and Phenolic acid, which showed the strongest interaction and the best stability profile against the von Willebrand factor A3 domain. The binding free energy (ΔG) value for Kaempferol was -7.9 kcal/mol and for Phenolic acid -4.4 kcal/mol, with a stability value (RMSD) of 0.0 Å for both compounds. The affinity value of Kaempferol is better than that of the reference compound (Coumarin, ΔG = -5.9 kcal/mol), while Phenolic Acid shows a low value. This strong binding affinity indicates the potential of both compounds in stabilizing the interaction of Factor VIII with the A3 domain of von Willebrand factor, which can support hemostatic function. These findings concluded that Kaempferol and Phenolic Acid are worthy of further development as candidate adjunct therapies for Hemophilia A. Therefore, further studies are highly recommended to validate these findings through molecular dynamics simulations, in vitro and in vivo tests to confirm the biological activity and pharmacokinetic (ADME) profile of these compounds. Contribution: This study introduces the bioactive compounds Kaempferol and Phenolic acid from biwa leaves as new candidates for modulating the A3 domain of von Willebrand factor, offering a potential and largely unexplored adjunctive strategy in Hemophilia A treatment

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