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INDONESIA
Hydrogen: Jurnal Kependidikan Kimia
Published by Universitas Pendidikan Mandalika
ISSN : 23386487     EISSN : 26563061     DOI : Prefix 10.33394
Core Subject : Science, Education,
Chemistry Education
Hydrogen: The Chemistry Education Journal published by the Chemistry Education Study Program which contains articles raised from the results of conceptual research and studies in chemistry and chemistry education including education and learning, device development, media and learning models.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 618 Documents
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Analysis of Protein Content in Moringa Leaves (Moringa oleifera) and Katuk (Sauropus androgynus) as an Alternative Plant-Based Protein Maulina, Tiara; Anggraeni, Egi Syahrah; Pratama, Kiki Putri Septya; Jannah, Miftahul; Masruhim, Muhammad Amir
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.16430

Abstract

Indonesia has many extraordinary biological resources, including flora that have great potential to function as a source of vegetable protein, such as Moringa oleifera and Sauropus androgynus. Humans need protein because it is a macromolecule that does many things for life systems, and is needed for tissue replacement and energy supply. Protein functions as a catalyst, transports molecules such as oxygen, supports the immune system, and transmits nerve impulses. The focus of this study was the protein content in moringa leaves (Moringa oleifera) and katuk leaves (Sauropus androgynus) in the shoots, young, and old parts. The moringa leaf samples examined showed a protein content of 22.24% in the shoots, 2.992% in the young leaves, and 4.272% in the old leaves. Meanwhile, fresh katuk leaves showed a protein content of 3.898% for the shoots, 4.767% for the young leaves, and 5.127% for the old leaves. The method used was the Kjeldahl method, namely the process of destruction, distillation, and titration used to measure protein content. The results of the study showed that moringa leaves, especially the shoots, have a higher protein content compared to katuk leaves, indicating that moringa leaves can function as an important source of vegetable protein. This study aims to measure and compare the protein levels in the top, young and old leaves of the two plants in fresh condition, in order to provide a more accurate picture of the nutritional potential of each part of the leaf and its contribution to the diversification of vegetable protein sources.
Application of Science Process Skills-Based Worksheets On The Project of Making Natural Larvicide From Areca Nut Rahma, Siti; Rahmatullah, Saepudin; Helsy, Imelda; Aisyah, Riri
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.16532

Abstract

This study aims to describe the application of science process skills-based worksheets in the project of making larvicides from areca nut extract on the cognitive and psychomotor aspects of students, as well as to determine the effectiveness of areca nut extract as a larvicide. This research raised the issue of using synthetic larvicides as learning facilitated by science process skills-based worksheets. The larvicide was divided into six concentration variations. This study used a pre-experiment method with a one-shot study case design involving one experimental class, without a pretest or control class. The subjects used in this study were 36 10th grade students of MAN 2 Bandung City. Data collection used instruments in the form of science process skills-based worksheets, observation sheets, performance assessment sheets, and presentation assessment sheets. Data analysis of science process skills was done with a Likert scale assessment. The cognitive aspect of the science process skills worksheet obtained an average score of 82, with a very good interpretation, while the psychomotor aspect of students was 83, which showed a very good interpretation. It can be concluded that the use of science process skills-based worksheets can help in cognitive skills and psychomotor skills. In the larvicide making project, effective results were obtained at a concentration of 9 mL with a percentage of mosquito larvae death of 100%.
Synthesis AuNPs Using Moringa oleifera Extract and Potential Study as Colorimetric Microplastic Detection Thohir, Muhammad Bakhru; Setyaningrum, Dyah; Efendi, Meilisa Rusdiana Surya; Saputra, Arya Ananda; Nursaida, Marta Citra
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.16603

Abstract

Nanoparticles are multipurpose materials that have been utilized in the medical, energy, and environmental monitoring fields. The advantage of nanoparticles is that they have unique physicochemical properties such as surface area, optical activity, and surface modifiability. One of the important uses of nanoparticles is for environmental monitoring. This is because the surface of nanoparticles can be modified, and with their small size, they can reach analytes in difficult matrices. However, conventional synthesis methods of nanoparticles have been unsustainable. Therefore, the synthesis of AuNPs using bioreductors was considered urgent. The aim of this research was to determine the optimum conditions for the synthesis of AuNPs with Moringa oleifera (MO) as a bioreductor to obtain AuNPs-MO, to characterize the synthesized AuNPs-MO, and to study the application of AuNPs-MO for monitoring microplastic pollutants. This research was conducted through the stages of extraction, determination of optimum conditions, characterization, and literature study of the potential of AuNPs-MO as a detector. Determination of optimum conditions was carried out by applying variations in pH and precursor-reducing agent ratio. The optimal pH was found to be 6, and the optimal volume ratio was 15:5 (mL). Characterization of AuNPs-MO was conducted using FTIR and PSA. The FTIR spectra showed identical absorption patterns for AuNPs synthesized with bioreductants, and the particle size was found to be 61.15 nm. In addition, microplastics were detected using AuNPs both directly, through surface modification with proteins, and indirectly, with the assistance of acetone. From this series of experiments, satisfactory results were obtained.
Synthesis of Silicon/Silica/Carbon Composite from Rice Husk via Mechanical Milling Method as Anode Lithium-Ion Batteries Ramdhan, Mohamad Alief; Muliawati, Nindya Tri
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.16618

Abstract

Silicon (Si) and silicon dioxide (SiO₂), with high theoretical capacities of 4200 mAh g⁻¹ and 1965 mAh g⁻¹ respectively, have attracted considerable interest as potential anode materials for lithium-ion batteries (LIBs), especially when derived from abundant and renewable sources like rice husk (RH). However, their practical applications are hindered by major challenges, such as significant volume expansion (100%–300%) during charge/discharge cycles and inherently low electrical conductivity (~10⁻¹ S m⁻¹). This study aims to develop a low-cost, sustainable, and high-performance Si/SiO₂/C composite anode material from rice husk using a combination of mechanical milling and AlCl₃/NaCl-activated aluminothermic reduction. The work specifically explores the effects of single-step versus two-step milling processes on the structural integrity and electrochemical performance of the resulting composites. The two-step milling method, a relatively new and more controlled approach, effectively eliminated unwanted metal oxide by-products, as confirmed by X-ray diffraction (XRD) analysis. In contrast, the single-step process resulted in residual impurities. Electrochemical tests revealed that the two-step Si/SiO₂/C composite delivered a significantly higher specific capacity of 280.01 mAh g⁻¹ after 50 cycles, compared to 146.15 mAh g⁻¹ from the single-step method. These results highlight the potential of rice husk-derived Si/SiO₂/C composites as eco-friendly and efficient anode materials for next-generation LIBs.
The Effects of Microplastic Chemical Waste on the Environment : Literature Review Indah, Dahlia Rosma; Rayani, Dewi; Nurwahidah, Nurwahidah
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.16747

Abstract

Microplastics are plastic flakes or crumbs with a size smaller than 5 millimeters that come from large plastic fragments such as crackle bags, clear plastic, clothing waste, plastic bottles, styrofoam and sachets that are fragmented due to water currents and sun exposure. The danger of microplastics when they enter water, can absorb heavy metals and pollutants in the water, such as Chlorine, Phosphate, Manganese, and Chromium. As a result, the water ecosystem will be disrupted. If microplastics are ingested by fish, the fish's reproductive and growth systems are damaged. Moreover, it can interfere with human hormones if you consume the fish. The test was carried out using the Microplastic Rapid Test method using a stereo microscope connected to a monitor, so that with a magnification of 100 to 400 times, it can physically detect microplastics in the water. This researcher is a literature review. The database used in the search for this article uses Google Scholar and ScienceDirect with the keywords "microplastic, plastic waste effect, coastal microplastic, microplastic marine fish, microplastic and health effect", which has been carried out by previous researchers both from within and outside the country. The articles obtained were selected according to the topic of microplastic pollution in coastal areas, which can be downloaded, and articles published from 2018-2024. The articles reviewed were 10 articles that were relevant and according to the topic.
Profiling the Competence of Chemistry Education Students at FKIP UNTAN in Designing Technology-Based Instruction Dorkas, Marselka Meilani; Enawaty, Eny; Erlina
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 5 (2025): October 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i5.15035

Abstract

In the modern era and with the implementation of the Merdeka Curriculum, teachers are expected to adopt a different approach to learning by designing IT-based instruction. Education students, as prospective teachers, are expected to utilize technology to design and develop active and engaging learning experiences. This study aims to examine the competency profile of Chemistry Education students from the Faculty of Teacher Training and Education at Tanjungpura University, specifically the 2021 cohort, with a total of 45 respondents. The research method used is quantitative descriptive, with participants selected using a saturated sampling technique. Data collection techniques include a student competency profile questionnaire on IT-based learning design, a 21st-century skills implementation questionnaire, observation sheets of learning module designs, and unstructured interviews. Data were analyzed using descriptive quantitative methods. The results show the percentage scores for each aspect as follows: critical thinking and evaluation – 84%, e-safety – 85%, information, media, and technology skills – 84%, communication and collaboration skills – 89%, and creativity – 88%. Each of these aspects falls into the "Excellent" category, with an average score across all aspects of 86%. Therefore, it can be concluded that the competency profile of Chemistry Education students at the Faculty of Teacher Training and Education, Tanjungpura University, in designing IT-based learning as prospective teachers is in the “Excellent” category (86%).
Development of SAVI-Based Basic Chemical Law E -Module Juwita, Syita Auliah; Enawaty, Eny; Sasri, Risya
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 5 (2025): October 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i5.15124

Abstract

AbstractThe purpose of this study was to determine the validity of the SAVI-based basic chemical law e-module and to determine students' responses to the SAVI-based basic chemical law e-module. This study was conducted at SMA Negeri 5 Pontianak, Class XI Chemistry Major. This type of research is Research & Development (R&D), using the ADDIE development model (analysis, design, development, implementation, evaluation) with limitations on the development stage. The results of the study indicate that the developed SAVI-based basic chemical law e-module is included in the very feasible and feasible category with validation results from material experts of 97% (Very Valid), validation from language experts of 100% (Very Valid), validation from media experts of 96.13% (Very Valid), the results of the limited response test conducted by 12 students in class XI Chemistry majoring in three assessment aspects are categorized as very good with details of the module display aspect of 93.75% (Very Good), the material presentation aspect of 93.22% (Very Good), and the benefit aspect of 93.22% (Very Good), and the results of the extensive response test conducted by 24 students in class XI Chemistry majoring in the module display aspect showed a score of 93% (Very Good), the material presentation aspect of 93.48%, and the benefit aspect of 94.53% (Very Good). This shows that the SAVI-based basic chemical law e-module is very feasible to use in the learning process.
Identification of Learning Theories in Learning Videos: A Case Study of Prospective Chemistry Teacher Students Ruslan, Zuhrah Adminira; Munawwarah
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 5 (2025): October 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i5.17500

Abstract

This study investigates the ability of prospective chemistry teachers to identify learning theories embedded in instructional videos. A descriptive qualitative case study was conducted involving 48 students enrolled in the Foundations of Science Education course at Universitas Negeri Makassar. Three chemistry instructional videos were deliberately designed to incorporate elements of behaviorist, cognitivist, constructivist, humanistic, and cybernetic theories. Students analyzed the videos using an identification sheet to document their observations. The findings reveal varying levels of recognition across the learning theories. Constructivist theory was most frequently identified in Video 1, while behaviorist principles dominated Videos 2 and 3, particularly in segments emphasizing drill, repetition, and stimulus–response reinforcement. Cognitivist theory appeared consistently, though less prominently, across all videos. In contrast, humanistic and cybernetic perspectives were recognized to a lesser extent, suggesting that affective, motivational, and systemic components were less explicitly represented. These results underscore the importance of integrating diverse learning theories in video-based instruction to promote not only conceptual understanding but also motivation, empathy, and systemic thinking. The novelty of this research lies in positioning instructional videos as pedagogical representations that reveal prospective teachers’ reasoning about learning theories, rather than merely treating them as delivery tools. This approach provides a new lens for evaluating theoretical literacy in teacher education and emphasizes the need for reflective engagement with instructional media during teacher preparation.
Ethnochemistry Supports 21st Century Skills: Systematic Literature Review Ashari, Ayu; Munawwarah
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 5 (2025): October 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i5.17560

Abstract

This research aims to identify and analyze the contribution of ethnochemistry in supporting the development of 21st-century skills within the context of chemistry education. This study is important because many studies identify ethnochemistry as a highly potential field, but few have thoroughly examined how ethnochemistry can be applied to support the development of 21st-century skills. Using a Systematic Literature Review (SLR) approach, this research collects and evaluates relevant literature on the relationship between ethnochemistry and 21st-century skills. Thirteen articles were selected from a pool of 79 collected articles. Several 21st-century skills supported by the articles include scientific literacy, chemical literacy, critical thinking skills, and problem-solving abilities. The analysis shows that the dominant 21st-century skills supported are scientific literacy (46%) and chemical literacy (38%). These percentages are obtained by comparing the number of articles for each skill with the total number of articles analyzed. The conclusion of this study is that the 21st-century skills supported by ethnochemistry include scientific literacy, chemical literacy, critical thinking skills, and problem-solving abilities. However, there are still limitations: firstly, most studies are local and contextual; secondly, most studies use short-term designs, without long-term follow-up; thirdly, research instruments in several studies are limited to questionnaires and student perceptions, without data triangulation. This study recommends further research into the integration of ethnochemistry to support 21st-century skills such as critical thinking, problem-solving, creativity, collaboration, and others. Moreover, it is necessary to integrate ethnochemistry into the chemistry education curriculum, incorporating ethnochemistry as part of the teaching method that can enrich the teaching material with local cultural contexts.
Molecular Docking of Anthraquinones from Morinda citrifolia Root as α-Glucosidase Inhibitors Tobing, Aldi; Masriani, Masriani; Arief, Ihsanul
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 5 (2025): October 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i5.17725

Abstract

Diabetes mellitus is a chronic metabolic disorder characterized by persistent hyperglycemia and remains one of the major contributors to global morbidity and mortality. The development of safer and more effective antidiabetic agents from natural products has gained increasing attention due to the limitations of current synthetic drugs. Morinda citrifolia root has been reported to contain various anthraquinone derivatives with potential bioactivity. This study aimed to evaluate the inhibitory potential of 23 anthraquinone derivatives from Morinda citrifolia root against the α-glucosidase enzyme using an in silico molecular docking approach. Molecular docking was conducted using AutoDock Vina against α-glucosidase (PDB ID: 5ZCC) after protein preparation in UCSF Chimera. The docking targeted the catalytic site containing key residues (Arg411, Gln256, and Asp327) that interact with acarbose, and interaction patterns were analyzed using BIOVIA Discovery Studio Visualizer. The results demonstrated that several compounds exhibited stronger binding affinities than the standard inhibitor acarbose (-8.4 kcal/mol), while maintaining similar interaction patterns. In particular, compound 21 (-8.9 kcal/mol, H-bond with Gln256), compound 18 (-8.7 kcal/mol, H-bond with Arg411 and Gln256), and compound 15 (-8.3 kcal/mol, H-bond with Gln256 and Asp327) emerged as the most promising candidates. These findings suggest that anthraquinone derivatives from Morinda citrifolia root may serve as potential α-glucosidase inhibitors and warrant further pharmacokinetic and experimental validation.

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