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JKPK (Jurnal Kimia dan Pendidikan Kimia)
Published by Universitas Sebelas Maret
ISSN : 25034146     EISSN : 25034154     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
The JKPK (Jurnal Kimia dan Pendidikan Kimia) is a national journal, published three times a year in April, August, and December, containing research articles on Chemistry and Chemistry education.
Arjuna Subject : -
Articles 114 Documents
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Biosynthesis and Characterization of SiO-Cochineal Dye Nanoparticles Based on Salak Frond Silica for Fingerprint Visualization Applications Sari, Sri Adelila; Kabeakan, Feri Yuni Asiyah; Febriana, Rani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 2 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i2.106785

Abstract

Latent fingerprint visualization is a critical technique in modern forensic science that requires effective and environmentally sustainable coloring agents. This study reports synthesizing and characterizing a novel dyeing agent based on Cochineal insect extract combined with silica derived from salak (Salacca zalacca) bunch waste. It evaluates its application in fingerprint visualization. Cochineal extract was obtained via stepwise heating in a polar solvent, while silica was synthesized through carbonization, demineralization, destruction, and neutralization. The SiO–Cochineal nanoparticles were prepared using a stepwise thermal immobilization method, resulting in covalent bonding between the pigment and silica matrix. Structural and functional group characterization using FTIR confirmed the presence of Si–O–Si, O–H, and C=O groups, indicating successful integration. Application tests on latent fingerprints demonstrated that the composite powders produced sharp and distinct ridge patterns, particularly on non-porous substrates such as glass and optical discs. These findings suggest that SiO-Cochineal-based powders are effective for forensic applications and represent a promising green alternative for latent fingerprint visualization.
Molecular Docking Analysis of Bioactive Compounds from Jatropha Curcas L. Leaves as Lipoxygenase Inhibitors and Antioxidant Candidates Sadik, Fahmi; Rufiyani, Wa Ode; Hi. Yusuf, Muhammad Fakhrur Rajih
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 3 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i3.110639

Abstract

Oxidative stress results from an imbalance between reactive oxygen species (ROS) and the body's antioxidant defense system, contributing to various degenerative diseases. The enzyme Lipoxygenase (LOX) plays a crucial role in ROS formation; thus, its inhibition offers a strategic approach to mitigate oxidative damage. This study aims to evaluate the potential of bioactive compounds from Jatropha curcas L. leaves as LOX inhibitors using in silico approaches. The target protein (Human 15-LOX, PDB ID: 7LAF) and ligand structures were retrieved from the Protein Data Bank and PubChem. Flexible molecular docking simulations were performed using YASARA Structure to accommodate receptor side-chain adjustments, validated against the native ligand (XRP) and a positive control (Zileuton). The results revealed that Naringenin-7-O-β-D-glucopyranoside exhibited the strongest binding affinity (–10.41 kcal/mol), surpassing both the native ligand (–9.03 kcal/mol) and Zileuton (–7.48 kcal/mol), driven by extensive hydrogen bond networks with residues ASN173 and ASP625. Meanwhile, the aglycone (-)-Pinoresinol demonstrated competitive affinity (–8.80 kcal/mol) stabilized by hydrophobic interactions with PHE88 and TRP109. While glycosides showed superior potency, (-)-Pinoresinol and Epicatechin were identified as the most rational oral drug candidates, fulfilling Lipinski’s Rule of Five and demonstrating high intestinal absorption (>90%) in ADMET analysis. These findings provide a structure-based rationale for selecting J. curcas metabolites as promising LOX inhibitor candidates for further in vitro validation.
Development of PjBL–ESD E-Module to Improve Disaster Literacy for Higher Education Students Herdini, Herdini; Abdullah, Abdullah; Erviyenni, Erviyenni; Holiwarni, Betty; Wulandari, Putri Adita; Nazhifah, Siti; Putri, Tiara Swastika
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 11, No 1 (2026): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v11i1.115576

Abstract

The relatively low level of students’ disaster literacy indicates that disaster education in higher education has not yet been optimally implemented, particularly due to lecturer-centered approaches, limited contextual learning, and insufficient use of digital learning resources. This study aimed to develop and evaluate the validity, practicality, and preliminary effectiveness of an e-module based on Project-Based Learning integrated with Education for Sustainable Development (PjBL–ESD) to enhance students’ disaster literacy. This study employed a Research and Development (R&D) method using the 4-D model. The validity of the e-module was assessed through expert review covering content, media, and pedagogical aspects. Practicality was evaluated through questionnaires administered to lecturers and students, focusing on ease of access, time efficiency, and ease of use. The preliminary effectiveness test involved a one-group pretest–posttest design analyzed using a paired-sample t-test. The effectiveness test involved 38 students enrolled in the Environmental Science and Disaster Mitigation course. The results showed that the PjBL–ESD e-module achieved a very high level of validity (≥96%) and demonstrated excellent practicality, with average scores of 98.40% from lecturers and 98.54% from students. The effectiveness test indicated a statistically significant improvement in disaster literacy, with the mean score increasing from 49.14 (pretest) to 81.74 (posttest) (p < 0.05). These results suggest that the PjBL–ESD e-module is valid, practical, and has strong potential to improve students’ disaster literacy within the context of this study. However, the lack of a control group inherent in the one-group pretest–posttest design constrains the extent to which causal conclusions can be drawn. This study implies that the integration of PjBL and ESD in digital modules can support more contextual and student-centered learning, particularly for disaster mitigation education in higher education.
GC-MS and ADMET Profiling of Bruguiera gymnorrhiza Mangrove Leaf Extract Origin Sulawesi with Antioxidant Properties Tanod, Wendy Alexander; Dewanto, Didit Kustantio; Cahyono, Eko; Rieuwpassa, Frets Jonas; Ansar, Novalina Maya Sari; Sambeka, Yana; Ijong, Frans Gruber; Mandeno, Jefri Anthonius; Pumpente, Obyn Imhart; Triyastuti, Meilya Suzan
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 1 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i1.100362

Abstract

Mangrove plants, particularly Bruguiera gymnorrhiza, are recognized as sources of bioactive compounds. This study analyzed the chemical profiles, safety, and antioxidant activity of B. gymnorrhiza leaf extract origin Sulawesi, a biodiversity-rich Wallacean region. Research on B. gymnorrhiza leaves from Sulawesi remains scarce. GC-MS analysis identified inositol, fatty acid, ester, and terpenoid derivatives as major chemical profiles related to stress tolerance and remedial properties. ADMET predictions showed good intestinal absorption but suggested potential hepatotoxicity at high doses. Brine shrimp lethality tests revealed low acute toxicity with an LD₅₀ of 873.381 µg/mL, supporting in silico findings. The extract exhibited strong antioxidant activity (IC₅₀ 49.78 µg/mL), comparable to Vitamin E, and higher than reports from other regions. These results indicate that Sulawesi mangroves store valuable chemical compounds and serve as environmental health indicators. Combining chemical profiling, computational prediction, and experimental validation highlights their pharmaceutical potential while emphasizing the need for careful dose optimization and ecological monitoring. This study reinforces the importance of conserving Wallacean biodiversity and offers a foundation for safe, natural antioxidant commercialization. Future work should assess in vivo effectiveness, long-term toxicity, and the ecological impacts of pollutant immobilization in mangrove ecosystems.
Analysis of General Chemistry Textbooks Based on Multiple Representations of the Cell Potential Concept Muntaha, Annisa Shafira; Wiji, Wiji; Widhiyanti, Tuszie; Mulyani, Sri
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 2 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i2.99745

Abstract

Textbooks function as core learning resources in chemistry, particularly for explaining abstract ideas through visual representations. This study examines how the concept of electrochemical potential cells is represented in five college level general chemistry textbooks using five analytic criteria covering representation type, explicitness, connectedness, information sufficiency, and conceptual relatedness. The sample comprises widely adopted texts that span foundational topics to ensure relevance across common curricula. The analysis identified a distinct pattern within each category. Category C1 was dominated by symbolic representations at 74.7 percent. Category C2 showed predominantly explicit presentations at 79.3 percent. Category C3 reflected fully related and connected representations. Category C4 demonstrated complete presence of appropriate information at 100 percent. Category C5 included three levels of conceptual relatedness with quite related at 74.2 percent, not quite related at 19.4 percent, and not related at 6.5 percent. The findings outline the current quality of visual representations of potential cells in higher education materials and indicate areas where integration across macroscopic, submicroscopic, and symbolic levels could be strengthened. Educators, textbook authors, and curriculum developers can apply these insights to design materials that support deeper conceptual understanding and more coherent transitions between representations. 
Safer and Sustainable Co-precipitation Synthesis of NCA (LiNi0.80Co0.15Al0.05O2) Cathodes: Eliminating Ammonia in Favor of NaOH for pH Control Nisa, Shofirul Sholikhatun; Arinawati, Meidiana; Yudha, Cornelius Satria; Nurohmah, Anisa Raditya
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 3 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i3.108184

Abstract

Developing safer and more sustainable synthesis routes for lithium ion battery cathodes is important for both environmental practice and laboratory education. This study reports an ammonia free oxalate coprecipitation route to synthesize LiNi0.80Co0.15Al0.05O2 (NCA), in which ammonia as the usual pH controller was fully replaced by sodium hydroxide (NaOH). NaOH dosage was varied at 20 g, 40 g, 60 g, and 80 g to control precipitation, precursor quality, and the properties of the final cathode after calcination and sintering. X ray diffraction confirmed formation of a layered α NaFeO2 type structure with R3m symmetry for all samples without detectable secondary phases. The 40 g NaOH condition showed the best structural ordering, reflected by a relatively high I(003)/I(104) intensity ratio associated with reduced cation mixing. Fourier transform infrared spectra verified oxalate ligand decomposition during thermal treatment and the appearance of metal oxygen lattice vibrations consistent with NCA formation. Scanning electron microscopy revealed that the 40 g NaOH sample produced more uniform particles with a narrower size distribution than other variants. Based on these results, the 40 g NaOH sample was selected for electrochemical evaluation and delivered an initial discharge capacity of about 110 mAh/g at 0.1 C in a full cell configuration. Overall, NaOH is demonstrated as an effective and safer substitute for ammonia in oxalate coprecipitation, enabling greener NCA synthesis protocols for research and teaching.
Biosynthesis and Characterization of ZnO Nanoparticles with Beet Extract (Beta vulgaris L.) as Latent Fingerprint Identification Sari, Sri Adelila; Siregar, Riri Virzan Putri Br.; Nabillah, Luthfi Qori; Hasibuan, Hanisah; Mahat, Naji Arafat
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 3 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i3.91700

Abstract

The uniqueness and permanence of patterns make fingerprints one of the most significant forensic tools for individual identification. The issue is that conventional fingerprint powders, frequently used today, pose serious health and environmental risks due to their use of toxic chemicals. This novel study utilizes sustainable and innovative techniques to investigate the effectiveness of beetroot fruit extract for latent fingerprint visualization. Zinc oxide (ZnO) nanopowders were synthesized using a green synthesis method, having beet fruit extract as an aqueous solvent. For applications on porous and non-porous surfaces, the fabricated ZnO was characterized using Fourier Transform Infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray (EDX) analysis up to October 2023. Thirty samples were provided to perform latent fingerprint analysis. The results show that ZnO nanopowders synthesized using beet fruit extract could provide safe, non-destructive, and efficient visualization of the latent fingerprints. Of the six fingerprint patterns examined, the most common was the Plain Whorls pattern, which represented 47% of prints identified. These results highlight beet fruit extract's natural potential and efficacy as a contrast agent for imaging latent fingerprints. This clean approach can provide a novel alternative for forensic biology, characterized by low toxicity, sustainability, and high efficacy, which can lead to a safe forensic practice.
Mapping Minds in Chemistry: Implementing the Flow Map Method within the 8E Learning Cycle to Uncover Students’ Cognitive Structures Suryani, Elma; Ridwan, Achmad; Sulistyowati, Rizky; Allanas, Edith; Hanifah, Sarina; Febriani, Fazila Windy; Hafizh, Ahmad; Mardiah, Musyahadah Rodiatam
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 11, No 1 (2026): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v11i1.110357

Abstract

Understanding students’ cognitive structure is essential for improving conceptual learning in science, particularly in challenging topics such as the rate of reactions. However, many students struggle with fragmented knowledge and misconceptions in this area. This study investigates how the 8E Learning Cycle model supports the development of students’ cognitive structure, analyzed through the flow map method. The participants were 33 Senior high school students, and a qualitative approach was employed using multiple data sources (flow maps, worksheets, interviews, journals, observations, and comprehension tests). Cognitive structure was examined based on Tsai’s six variables: extent, richness, integration, misconceptions, information retrieval rate, and flexibility. Results indicated that at the beginning of instruction, students’ average scores on cognitive structure variables were low, while misconceptions were frequent. After engaging in the 8E Learning Cycle, students demonstrated notable improvement across all variables, accompanied by a marked reduction in misconceptions. This study provides empirical evidence that the 8E Learning Cycle model effectively strengthens students’ cognitive structures in science learning, offering a practical framework for addressing conceptual difficulties in reaction rate topics
Unveiling Students' Understanding of Ammonia as a Weak Base through Scaffolding-Based Chemical Reasoning Assessment Faturohman, Yuda; Susilaningsih, Endang; Harjono, Harjono; Nuswowati, Murbangun; Kusumastuti, Ella; Ramadhani, Dimas Gilang
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 1 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i1.100779

Abstract

Reasoning is a basic cognitive ability in science learning, especially in chemistry, in which students must connect macroscopic, symbolic, and microscopic levels. However, most students seem to have difficulty learning chemical reasoning, especially in the ionization of weak bases (examples: NH₃). This study uses a scaffold-based assessment to evaluate students' explanations for ammonia as a base. A paper-and-pencil test was applied to 91 first-year preservice chemistry students to test them on phenomenological, mechanical, and structural types of reasoning. Two raters rated responses, and scoring reliability was assessed using Cohen’s Kappa (0.925). The data analysis consisted of descriptive statistics, correlation analysis, clustering (K-Means and t-SNE), and regression prediction with XGBoost. The results demonstrate that structural reasoning exhibits the highest level, but phenomenological reasoning has the most variation. There appears to be a high correlation between phenomenological empirical generalization and structural reasoning (r = 0.35+). Clustering outputs show three categories of students: high (R3), moderate (R2), and low (R1) reasoning, and most of the students are categorized at the moderate reasoning level, indicating some misconceptions. The XGBoost model performs well in predicting high-reasoning students but not in the moderate-reasoning classification. This paper indicates the power of scaffolding-embedded assessment for deducing reasoning patterns and misconceptions in ammonia ionization. The results can guide adaptive learning approaches for improving students' chemical reasoning.
Removal of Cu(II) and Pb(II) Ions from Wastewater Solutions Using Black Soldier Fly (Hermetia illucens) Pupal Shell: Adsorption and Characterization Kuncoro, Eko Prasetyo; Darmawati, Azra Rhea; Roshita, Pramudya Lizza; Soedarti, Thin
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 1 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i1.100111

Abstract

Industrial wastewater often contains heavy metals such as Pb(II) and Cu(II) that pose significant environmental and health risks. This study investigates the utilization of Black Soldier Fly (BSF) (Hermetia illucens) pupal shells as an adsorbent material for the removal of Pb(II) and Cu(II) ions from aqueous solutions. BSF pupal shells were chosen due to their high availability, rapid life cycle, and chitin-rich composition, making them suitable for heavy metal adsorption. The preparation process included washing, drying, grinding, and activation with 1 M NaOH solution. Characterization of the adsorbent was performed before and after adsorption using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy (SEM-EDX). Adsorption experiments were conducted to examine the effects of pH, contact time, and initial ion concentration. The optimum pH for adsorption was found to be 5.5, achieving removal efficiencies of 95.5% for Pb(II) and 71.81% for Cu(II). The optimum contact times were 180 minutes for Pb(II) and 240 minutes for Cu(II). Kinetic analysis demonstrated that the adsorption process followed a pseudo-second-order model. Adsorption isotherm studies indicated that the Langmuir model provided a better fit (R² = 0.99 for Pb(II) and 0.98 for Cu(II)) compared to the Freundlich model (R² = 0.90 for Pb(II) and 0.77 for Cu(II)). These results demonstrate that BSF pupal shells are a promising, cost-effective, and environmentally friendly material for industrial wastewater treatment applications

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