Jurnal Penelitian Pendidikan IPA (Science Education Graduate Program University of Mataram)
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The Effect of Adding Variations in the Combination of Anthocyanin Extract and Curcumin Volume Fraction on the Mechanical Properties and Biodegradability of Seaweed-Based Bioplastic Materials
No full textThe environmental issues caused by conventional plastic waste are becoming increasingly serious, driving the development of more eco-friendly bioplastics. This study examines the mechanical properties, solubility, and biodegradability of seaweed-based bioplastics with the addition of curcumin and anthocyanin as additives. The results indicate that bioplastics containing only anthocyanin exhibit the best tensile strength (3.78 ± 0.26 MPa) and elasticity (12.48 ± 0.49 MPa). In contrast, bioplastics containing only curcumin show the lowest mechanical properties. The addition of anthocyanin enhances tensile strength and elasticity through the formation of strong hydrogen bonds with seaweed polymers, whereas curcumin decreases mechanical properties due to less stable molecular interactions. In terms of solubility, anthocyanin recorded the highest value (72.04%), while curcumin had the lowest (37.61%) due to its lower water stability. Regarding biodegradability, the combination of anthocyanin (1.25%) and curcumin (3.75%), as well as pure curcumin (5%), showed the highest degradation rates, whereas a balanced mixture (2.5%:2.5%) exhibited the lowest biodegradability. In conclusion, anthocyanin improves the mechanical properties and solubility of bioplastics, while curcumin supports biodegradability. Seaweed-based bioplastics with added curcumin and anthocyanin show potential as eco-friendly antibacterial materials
Pengembangan Konten Kreatif Berbasis Website sebagai Media Pembelajaran pada Materi Geometri Molekul
No full textEffective chemistry learning should be designed to actively engage students in various activities that promote deep understanding of abstract concepts, skill enhancement, and positive behavior development. This study aimed to develop creative content based on a website as a learning media for molecular geometry topics. This study uses the ADDIE development model (Analysis, Design, Development, Implementation, and Evaluation). The study involved 32 students at the high school, 5 educators, and 3 validators. The results show that 100% of the validators stated that the content developed on the website is valid. The developed content aligns with the material concept, and the learning objectives are based on the needs and expected learning outcomes. Feasibility test results indicate that the website meets the criteria for facilities and media quality, aligning with standards for an ideal learning platform. Therefore, it can be concluded that the creative website-based content developed for molecular geometry is highly suitable and can increase students engagement in the learning process and understanding of abstract chemical concepts.Tujuan penelitian ini adalah untuk menghasilkan konten kreatif berbasis website sebagai media pembelajaran pada materi geometri molekul. Penelitian ini merupakan riset pengembangan dengan menggunakan model pengembangan ADDIE (Analysis, Design, Development, Evaluation). Penelitian ini melibatkan 32 peserta didik pada jenjang SMA, 5 pendidik, dan 3 validator. Hasil penelitian menunjukkan bahwa 100% validator menyatakan konten yang dikembangkan pada website sudah valid, konten yang dikembangkan sesuai dengan konsep materi, alur tujuan pembelajaran sudah sesuai dengan kebutuhan serta capaian pembelajaran yang diharapkan. Berdasarkan hasil uji kelayakan, kriteria fasilitas dan kualitas media pada website telah memenuhi kriteria yang sesuai untuk sebuah website yang ideal. Sehingga dapat disimpulkan bahwa konten kreatif berbasis website pada materi geometri molekul yang dikembangkan sudah sangat layak untuk digunakan dalam pembelajaran
The Impact of Moodle on Scientific Attitudes Skills and Student’s Motivation on Science Learning in Elementary School
No full textThe aim of the study was to determine the effect of LMS Moodle on scientific attitudes and motivation in science lessons for class V at SDN Demangan, to find out differences in scientific attitudes and learning motivation between classes using Moodle LMS and classes using PowerPoint in science lessons for class V at SDN Demangan. The subjects in this study were 44 students in class 5 of SDN Demangan. The research method uses a quasi-experimental design with a non-equivalent control group design. The data analysis technique used is the paired samples t-test and the independent samples t-test. The results showed that there was a significant and positive effect of the use of LMS Moodle and Powerpoint on scientific attitudes and learning motivation of students with the results of the t test analysis respectively of 11.762, 10.283 and 8.047 and 10.109 with the same significance 0.00 < 0.05, there are differences in scientific attitudes and learning motivation between classes using Moodle LMS media and classes using PowerPoint media with a significance level (2-tailed) 0.009 < 0.05.AbstrakTujuan dari penelitian ini adalah untuk mengetahui pengaruh penggunaan LMS Moodle terhadap sikap ilmiah dan motivasi belajar pada pelajaran IPA kelas V di SDN Demangan, serta untuk mengetahui perbedaan sikap ilmiah dan motivasi belajar antara kelas yang menggunakan LMS Moodle dan kelas yang menggunakan PowerPoint pada pelajaran IPA kelas V di SDN Demangan. Metode penelitian yang digunakan adalah desain eksperimen semu dengan desain kelompok kontrol yang tidak setara. Teknik analisis data yang digunakan adalah uji t sampel berpasangan dan uji t sampel independen. Hasil penelitian menunjukkan bahwa terdapat pengaruh signifikan dan positif dari penggunaan LMS Moodle dan PowerPoint terhadap sikap ilmiah dan motivasi belajar peserta didik dengan hasil analisis uji t masing-masing sebesar 11,762, 10,283, 8,047, dan 10,109 dengan tingkat signifikansi yang sama 0,00 < 0,05, serta terdapat perbedaan sikap ilmiah dan motivasi belajar antara kelas yang menggunakan media LMS Moodle dan kelas yang menggunakan media PowerPoint dengan tingkat signifikansi (2-tailed) 0,009 < 0,05.Kata Kunci: sistem manajemen pembelajaran Moodle, PowerPoint, sikap ilmiah, motivasi belajar sisw
Development of Integrated Flipbook Learning Media with 2-Dimensional Quartet Cards (KAKASIBOOK) to Improve Student Learning Outcomes in IPAS Learning Content
No full textThis study used a research and development method (Research and Development) referring to the Borg and Gall model. This study was conducted with the aim of developing and testing the feasibility, practicality and effectiveness of the Kakasibook learning media. This study involved 26 students with 6 students as small-scale trial subjects and 20 students as large-scale trial subjects of SD Negeri Gondoriyo. The data collection techniques used were test techniques (pretest-posttest) and non-tests in the form of observation results, questionnaires, interview results and document data. The validation results were carried out by media expert validators and material experts which showed that the Kakasibook learning media had met the valid criteria with a score of 90% by the media expert validator, and 95% by the material expert validator. Based on the pretest-posttest results, it is known that Kakasibook is effective in improving student learning outcomes as evidenced by the results of an increase in the average pretest score of 42.85 to 85.14 at the time of the posttest and the results of the n gain test obtained <g> a gain value of 0.74 with a high category. Based on the results of the distributed response questionnaire, a very positive response was obtained from teachers and students. Based on these results, it can be concluded that the Kakasibook learning media is effective in improving learning outcomes in science subjects and is feasible and practical to be applied in student learning
Increasing the Effective and Efficient Harvest of Rice (Oryza sativa. L) in Nabire Barat District
No full textIncreasing the effectiveness and efficiency of rice harvesting (Oryza sativa. l) in west nabire district, nabire regency, aims to determine the effectiveness and efficiency of the use of Combine Harvester in rice harvesting in West Nabire District, Nabire Regency. This study used a survey method with a sample of 26 respondents by simple random sampling, with an interview method using a previously prepared questionnaire. The results of the study showed that the use of the Combine harvester harvesting machine was more effective than the manual rice harvesting process with an effective value of 1.073, with a cost reduction of Rp 747.385.4 and a reduction in grain loss during harvest of 586.44 kg. The use of Combine harvester has a beneficial impact because it can reduce production by Rp 747.385.4 and reduce crop loss by 586.44 kg of grain
Using K-Means Clustering to Analyze Socio-Economic Welfare of Oil Palm Farmers for Decision Support and Contextual Learning Integration
No full textThis study aims to cluster the welfare levels of oil palm farmers in Gading Sari Village, Tapung, using the K-Means Clustering algorithm. The analyzed variables include land area, family dependents, average monthly income, additional income, and educational attainment. Previous studies have extensively discussed the welfare of oil palm farmers. This research uses clustering methods to uncover new and more detailed findings about the welfare of oil palm farmers in rural areas. This approach offers a fresh perspective and can be utilized to support data-driven decision-making processes by the government. Data were collected through interviews with 111 oil palm farmers, processed through normalization, and analyzed using the elbow method to identify the optimal number of clusters. The results identified three main clusters: low, medium, and high welfare levels. Land area and average monthly income were the most significant differentiating factors among the clusters. This study's fundamental distinction lies in applying the K-Means algorithm to integrate the socioeconomic aspects of oil palm farmers into specific clusters. These clusters will provide new insights into their welfare conditions. The findings are expected to assist governments and stakeholders in designing more effective and targeted development programs for oil pal
Prediktor Utama Kualitas Hidup Lansia di Kabupaten Kampar: Pendekatan Multidimensi
No full textThis research investigates many factors that affect the quality of life of the elderly in Kampar Regency, Riau. This research, with 402 people aged 60 and above, indicated that the elderly's perception of their own health is the most significant predictor of their overall health-related quality of life. Social support—assistance from family, friends, and the community has been shown to be very impactful, highlighting the significance of social connections for well-being in later life. Leisure activities —spanning from morning walks to engaging in religious practices or gardening—substantially enhance well-being. Interestingly, the elderly's perception of justice in healthcare services also affects their quality of life. Elderly individuals who feel that access to healthcare services is distributed fairly tend to have a better quality of life. Meanwhile, aging does show negative effects, but this emphasizes the importance of programs that specifically target the needs of the elderly across various age groups, especially the very elderly. The utilization of community-based care services also plays an important role in improving the quality of life, demonstrating the value of a local support system that is easily accessible to the elderly. These findings provide a comprehensive picture of what is truly important for the elderly in Kampar Regency, and can serve as a foundation for the development of more effective programs to enhance well-being in old age.Penelitian ini menyelidiki banyak faktor yang mempengaruhi kualitas hidup lansia di Kabupaten Kampar, Riau. Penelitian ini, dengan 402 orang berusia 60 tahun ke atas, menunjukkan bahwa persepsi lansia terhadap kesehatan mereka sendiri adalah prediktor paling signifikan dari kualitas hidup mereka secara keseluruhan yang berhubungan dengan kesehatan. Dukungan sosial—bantuan dari keluarga, teman, dan masyarakat telah terbukti sangat berdampak, menyoroti pentingnya hubungan sosial untuk kesejahteraan di kemudian hari. Kegiatan rekreasi—mulai dari jalan pagi hingga terlibat dalam praktik keagamaan atau berkebun—secara substansial meningkatkan kesejahteraan. Menariknya, persepsi lansia tentang keadilan dalam layanan kesehatan juga mempengaruhi kualitas hidup mereka. Lansia yang merasa bahwa akses ke layanan kesehatan didistribusikan secara adil cenderung memiliki kualitas hidup yang lebih baik. Sementara itu, penuaan memang menunjukkan efek negatif, tetapi ini menekankan pentingnya program yang secara khusus menargetkan kebutuhan lansia di berbagai kelompok usia, terutama yang sangat tua. Pemanfaatan layanan perawatan berbasis masyarakat juga berperan penting dalam meningkatkan kualitas hidup, yang menunjukkan pentingnya sistem pendukung lokal yang mudah diakses oleh para lansia. Temuan ini memberikan gambaran menyeluruh tentang apa yang benar-benar penting bagi para lansia di Kabupaten Kampar, dan dapat menjadi landasan bagi pengembangan program yang lebih efektif untuk meningkatkan kesejahteraan di usia lanjut
Assessment of Baseflow Characteristics and Environmental Flow Allocation in the Welo Sub-Watershed, Central Java
No full textThis study assesses baseflow characteristics and environmental flow (EF) requirements in the Welo Sub-Watershed, Central Java, Indonesia—a region increasingly affected by land use change and climate variability. Using 30 years of daily streamflow data (1994–2023), baseflow was separated using the Fixed Interval Method with analysis conducted in Excel and the Hydrologic Engineering Center’s Hydrograph Analysis (HEC-HMS). EF was estimated using both the Tennant Method and Flow Duration Curve (FDC) analysis. Results indicate that average dry-season baseflow is 0.79 m³/s, while the reliable flow (Q80) averages 1.02 m³/s. EF estimates are 0.43 m³/s (Tennant) and 0.54 m³/s (FDC). Under normal hydrological conditions, baseflow exceeds EF thresholds. However, peak irrigation demand reaching 1.30 m³/s surpasses both baseflow and Q80 during dry periods. This suggests periods of ecological stress and potential conflict among water users. These findings underscore the need for integrating EF targets into local water resource planning to safeguard ecosystem function and ensure sustainable water allocation.Studi ini menyelidiki karakteristik aliran dasar dan persyaratan aliran lingkungan di Sub-DAS Welo, Jawa Tengah, Indonesia, suatu wilayah yang semakin terpengaruh oleh perubahan penggunaan lahan dan variabilitas iklim. Dengan menggunakan data aliran sungai harian selama 31 tahun (1994–2024), aliran dasar dipisahkan menggunakan Metode Interval Tetap, sedangkan Aliran Lingkungan (EF) ditentukan menggunakan metode Tennant dan Kurva Durasi Aliran (FDC). Hasil penelitian menunjukkan bahwa aliran dasar rata-rata selama musim kemarau adalah 0,79 m³/dtk, sedangkan aliran andalan (Q80) rata-rata 1,02 m³/dtk. Dengan menggunakan metode Tennant dan FDC, nilai aliran lingkungan yang diestimasikan adalah 0,43 m³/dtk dan 0,54 m³/dtk. Meskipun aliran dasar cukup untuk memenuhi kebutuhan aliran lingkungan dalam kondisi rata-rata, permintaan irigasi yang mencapai 1,30 m³/dtk melebihi aliran dasar dan Q80, terutama selama musim kemarau. Hal ini menunjukkan potensi stres ekologis dan persaingan untuk penggunaan air. Studi ini menyoroti pentingnya menggabungkan standar aliran lingkungan ke dalam strategi pengelolaan sumber daya air untuk memastikan keberlanjutan ekologis, khususnya di daerah yang sensitif secara hidrologis seperti Sub-DAS Welo.
Kata kunci: Aliran dasar; Aliran lingkungan; Sub-DAS Welo; Metode Tennant; Metode kurva durasi alira
Antimicrobial Activity of Eco-enzymes with Various Dilutions As A Natural Disinfectant
No full textEcoenzyme perfectly utilizes biological waste for non-chemical sanitation products through the fermentation of sugar, organic materials, and water. Ecoenzyme has been used to inhibit the growth of bacteria such as Staphylococcus aureus and Propionibacterium acnes. This study aims to determine the optimum concentration of eco enzyme as a natural antibacterial and disinfectant. This method uses gram-positive bacteria Staphylococcus aureus and gram-negative bacteria Escherichia Coli with the disc method. The dilution variations used were 0, 1:10, 1:50, and 1:100. Ecoenzyme is made from organic materials from pineapple, orange, papaya, starfruit, quinine, and mango skin waste (Bioz1), and coenzyme from pineapple, orange, banana stem, noni, quinine waste (Bioz2). The results showed that a ratio of 1:10 was the most effective dilution variation for inhibition against both types of bacteria. Furthermore, dilution at this concentration can be used as a natural disinfectant. The presence of acetic acid and enzymes (i.e. lipase and amylase) can inhibit certain strains of microorganisms, namely Escherichia coli and Enterococcus sp
The Effectiveness of the Project-Based Learning Model Integrated with Digital Teaching Materials and Computational Thinking to Improve the Habits of Mind of Elementary School Students
No full textThis study aims to test the effectiveness of the Project-Based Learning (PjBL) learning model that is integrated with digital teaching materials and computational thinking in improving the Habits of Mind of elementary school students in Malang Regency. The research approach used is quantitative with a pre-experiment type experimental design, using a one-group pretest-posttest design. The research instrument is in the form of pretest and posttest questions designed to measure the development of students' Habits of Mind before and after the application of the learning model. The results of data analysis showed a significant increase in posttest scores compared to pretests, with an average difference of 13.28 points and a significance value (Sig. 2-tailed) of 0.000. These findings indicate that the Project-Based Learning model that is integrated with digital teaching materials and computational thinking is effective in improving students' Habits of Mind. Thus, this model is recommended as an alternative learning strategy that is innovative and relevant to be applied at the elementary school level, especially in forming a critical, reflective, and adaptive mindset in students