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All Journal JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Inovasi Pendidikan IPA Science and Technology Indonesia Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Jurnal Sains Materi Indonesia
Kamari, Azlan
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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Thermal Conversion of Coral Waste and its Utilization as Low-Cost Catalyst for Biodiesel Production Widianingsih, Suci; Yanti , Ika; Kamari, Azlan; Fatimah, Is
Science and Technology Indonesia Vol. 9 No. 4 (2024): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.4.866-875

Abstract

This study investigates the thermal conversion of waste coral and its utilization as a heterogeneous catalyst for biodiesel production from soybean oil. In this work, waste coral is calcined at varied temperatures of 800, 900, and 1000°C, and the effect of the calcination temperature on the physicochemical character of the solid is evaluated through Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and basicity measurement. The results show that the higher temperature facilitates the conversion of CaCO3 of the aragonite and calcite phases in raw waste coral into CaO, achieving a complete conversion at the temperature of 1000°C. Thermal conversion influences the increased surface basicity of the solid, which is associated with the higher activity for biodiesel production. Further studies on the obtained CaO as a catalyst demonstrate the catalyst dosage and the methanol-to-oil ratio as significant factors for fatty acid methyl ester production. The highest yield of 98.7% is achieved after a 3 hours reaction with 8 wt.% catalyst dosage and 9:1 methanol-to-oil ratio. The catalyst exhibits stability with an insignificantly decreased yield until the fifth usage cycle. The optimum conditions and reusability features of the calcined waste coral suggest that waste coral is a favorable CaO catalyst source for biodiesel production.
How do Students Deal with Socio-scientific Issues: A Development of Students’ Decision-Making Skills Instrument Utami, Restu; Prodjosantoso, Anti Kolonial; Rohaeti, Eli; Kamari, Azlan
Jurnal Pendidikan Matematika dan Sains Vol 12, No 1 (2024): June 2024
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpms.v12i1.75002

Abstract

Decision-making skills is needed in dealing with socio-scientific issues (SSI) that is developing in society. Students need to learn to make appropriate judgments, so that they were not easily manipulated or biased towards science-related issue. This paper aims to analyze the validity and reliability of the decision-making skills instrument. The research respondents were 75 high school students (female = 52, male = 23) at Bantul Regency, Special Region of Yogyakarta. The decision-making skills instrument consists of 5 items open-ended questionnaire. Respondents were determined using the random sampling method. The validity test results showed that all of 5 items developed were valid, with Pearson product moment values between 0.572 and 0.801. The reliability test results were valid for all 5 items, with a Cronbach's Alpha coefficient of 0.744. Therefore, it could be concluded that the instrument was valid and highly reliable to measure students’ decision-making skills.
Systematic Literature Review: Opportunities and Strategies for Implementing Artificial Intelligence in Chemistry Learning in Indonesia Priyadi*, Danang; Widjajanti, Endang; Kamari, Azlan
Jurnal Pendidikan Sains Indonesia Vol 13, No 1 (2025): JANUARY 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jpsi.v13i1.42108

Abstract

There are major changes in industrial structure where digitalization and technological innovation are becoming the main factors of economic growth.This research aims to identify opportunities and strategies in the application of artificial intelligence (AI) to enhance chemistry learning in Indonesia. Through the systematic literature review (SLR) method, this research reviews 33 journals related to the application of AI in education, particularly in the subject of chemistry. Analysis shows that AI has the potential to make a significant impact through a more personalized, interactive, and adaptive approach to student needs. In addition, AI offers solutions to learning challenges, such as limited laboratory infrastructure, through the use of virtual simulations that facilitate experimental practice. Strategies that support the implementation of AI in chemistry education in Indonesia include improving access to technology, continuous teacher training, and raising awareness of technological changes in education. With effective implementation, AI is expected to make a real contribution to improving the quality of chemistry education in Indonesia
Clitoria ternatea Flower Extract Mediated Synthesis of Ni-Doped Hydroxyapatite as Photocatalyst, Antibacterial, and Drug Delivery Agent for Anticancer Drug Fatimah, Is; Nurlaela, Nunung; Fauziyyah, Anas Zahra; Sagadevan, Suresh; Hidayat, Habibi; Haneef, Mehru Nisha Muhamad; Daud, Muhammad Fauzi; Kamari, Azlan; Oh, Won-Chun
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.360-373

Abstract

In the present study, green synthesis of nickel-doped hydroxyapatite using Clitoria ternatea flower extract, and activity testing as photocatalyst, antibacterial agent and drug delivery agent were performed. Synthesis was conducted by hydrothermal treatment of co-precipitated precursors previously mediated with the extract. As drug delivery agent, immobilization of 5-fluorouracil (5FU) onto the prepared sample was performed by spray-drying method. Physicochemical characterization techniques of X-ray diffraction, UV-Visible Diffuse Reflectance Spectrophotometry, transmission electron microscopy, Raman and Fourier-Transform Infra-red spectroscopy were performed to determine the structural and surface properties of material. Photocatalytic activity evaluation for tetracycline removal showed that material has capability to reduce concentration by photocatalytic degradation and photocatalytic oxidation. The degradation efficiency of material was 83.78%. The prepared material exhibited a significant activity against Staphylococcus aureus and Escherichia coli bacteria. The material also expressed the potency as a drug-delivery agent of 5-fluorouracil as shown by the reduced CT26 cell viability of more than 85% during 48 hours.
Quercetin Encapsulation on Chitosan-Pectin Membranes as a Drug Delivery and Its Release Kinetics Hastuti, Budi; Hadi, Saptono; Nisriyah, Safarin; Martanisa, Mutiah; Kamari, Azlan
Jurnal Sains Materi Indonesia Vol. 27 No. 1 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.9988

Abstract

Chitosan-pectin membranes are biodegradable polyelectrolyte complexes, derived from biomaterials, with good stability for drug delivery applications. This study investigates the potential of these membranes to encapsulate quercetin, a flavonoid known for its therapeutic properties but limited for its low solubility, poor bioavailability, and rapid elimination. The membranes were synthesized using a 1:1 (w/w) chitosan-to-pectin ratio and loaded with quercetin via solvent evaporation. Characterization using FTIR confirmed the presence of OH, C=O, and NH groups; XRD indicated semi-crystalline structure; and SEM revealed a uniform, porous morphology. The maximum quercetin loading efficiency reached 82.43%, with the highest release (90.39%) observed at pH 1.2, following first-order kinetics. The resulting membrane was thin, brown, homogeneous, and tear-resistant, demonstrating its potential as a controlled drug delivery matrix for quercetin
Argument-Driven Inquiry Model in Chemistry Learning: A Systematic Review Romadhoni*, Siti Dzakiya; Atun, Sri; Kamari, Azlan
Jurnal Pendidikan Sains Indonesia Vol 13, No 4 (2025): OCTOBER 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jpsi.v13i4.47853

Abstract

Argument driven inquiry (ADI) model is an instructional learning model that combines argumentation with inquiry-based learning. The ADI model allows students to argue actively in the learning process. Previous research studies have found that the ADI model is widely applied in the field of chemistry. This study aims to systematically synthesize research acles related to the ADI model that focus on independent and dependent variables, chemical concepts, and conclusions in chemistry learning. This study uses the systematic literature review (SLR) method for 22 articles from the google scholar, ERIC (education resources information center) and scopus databases in the period 2016- 2025. Search through relevant keyword patterns, namely "ADI" and "chemistry education", index, title and abstract. The findings show that: 1) The dependent variables that are widely studied place the ADI model as a learning model, laboratory instructions, and levels in the inquiry method and the independent variables appear in the cognitive aspect, 2) The majority of study articles focus on the chemical concept of chemical equilibrium, 3) Most studies on the ADI model state that the ADI model is able to provide a positive influence or increase in learning competence in chemistry learning
Effectiveness of Discovery Learning Assisted by Chemical Monopoly on Critical Thinking and Learning Outcomes Martanisa, Mutiah; Hastuti, Budi; Setyowati, Widiastuti Agustina Eko; Kamari, Azlan
Jurnal Inovasi Pendidikan IPA Vol. 11 No. 2: October 2025
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jipi.v11i2.84674

Abstract

The purpose of this research is to determine the effect of the discovery learning model using chemistry monopoly media on the critical thinking skills and learning outcomes of 11th-grade students. This research employs a quantitative descriptive approach with a quasi-experimental design and a pretest-posttest nonequivalent control group design, utilizing instruments in the form of tests and an observation guide. The sampling technique used is cluster random sampling. Both the experimental class and the control class have 35 students. This study collected data through tests (pretest and posttest). Data analysis was conducted using normality and homogeneity tests, followed by the Mann-Whitney U test (since the data are not normally distributed), and the N-Gain test for assessing learning effectiveness. The research results indicate that the experimental class achieved a 58.79% increase in learning outcomes, whereas the control class experienced a 36.51% increase. In terms of critical thinking ability, the experimental class showed an improvement of 56.00%, while the control class improved by 37.18%. The Mann-Whitney U hypothesis test revealed the significance of cognitive learning outcomes to be 0.041 and the significance of critical thinking ability to be 0.019. Thus, the implementation of discovery learning affects students' critical thinking skills and learning outcomes in the context of acid-base chemistry
Co-Authors Anti Kolonial Prodjosantoso Budi Hastuti Daud, Muhammad Fauzi Eli Rohaeti Endang Widjajanti Fauziyyah, Anas Zahra Habibi Hidayat, Habibi Haneef, Mehru Nisha Muhamad Is Fatimah Martanisa, Mutiah Nisriyah, Safarin Nurlaela, Nunung Oh, Won-Chun Priyadi*, Danang Restu Utami, Restu Romadhoni*, Siti Dzakiya Sagadevan, Suresh Saptono Hadi, Saptono Setyowati, Widiastuti Agustina Eko SRI ATUN Suci Widianingsih Yanti , Ika