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All Journal International Journal of Evaluation and Research in Education (IJERE) PAEDAGOGIA JKPK (Jurnal Kimia dan Pendidikan Kimia)
Elfi Susanti VH
Department of Chemistry, PMIPA FKIP, Sebelas Maret University, Jl. Ir Sutami 36 A Surakarta 53126
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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Formulation, characterization, and antibacterial testing of cream supplemented with Aloe vera (Aloe vera L.) gel and Nutgrass (Cyperus rotundus L.) rhizome ethanol extract Mulyani, Sri; Rahmadina, Salsabila Adzani; Susanti VH, Elfi; Ariani, Sri Retno Dwi; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 1 (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.v9i1.84205

Abstract

Various brands and forms offer a wide array of cream-based cosmetic products. However, only some of these products meet safety specifications. Aloe vera and nutgrass, two plants rich in bioactive compounds, possess anti-inflammatory, soothing, and antibacterial properties, making them ideal for health-safe cosmetic formulations. This research was conducted to develop antibacterial cream formulations incorporating these natural additives. The study focused on quality, organoleptic testing, and the formulated cream's antibacterial assessment. The research methodology encompassed several key processes: preparation of Aloe vera gel and nutgrass rhizome ethanol extract, formulation of the cream, quality testing by SNI 16-6069-1999 standards, organoleptic testing as per SNI 01-2346-2006, and antibacterial activity testing using Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 bacterial strains. Results indicated that the cream formula enriched with Aloe vera gel and nutgrass rhizome ethanol extract meets the standards for skin-lightening creams and exhibits significant antibacterial capabilities. Furthermore, it was observed that the antibacterial effectiveness of the cream increases with the concentration of the nutgrass rhizome ethanol extract. These findings highlight the potential for integrating natural ingredients into modern cosmetic formulations, providing therapeutic and aesthetic benefits. This approach not only ensures compliance with safety standards but also leverages the natural properties of Aloe vera and nutgrass to enhance the product's functionality in skin care applications
Creative thinking enhancement through project-based learning in science: a meta-analytic review Hasibuan, Molani Paulina; Sunarno, Widha; Susanti VH, Elfi
International Journal of Evaluation and Research in Education (IJERE) Vol 14, No 5: October 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijere.v14i5.34521

Abstract

This research investigates the impact of project-based learning (PjBL) on enhancing students’ creative thinking abilities through a comprehensive meta-analytic study. Creative thinking is recognized as an integral part of higher-order thinking skills (HOTS) required for success. Employing the preferred reporting items for systematic reviews and meta-analyses (PRISMA), studies published between 2014 and 2024 were identified and synthesized from the Scopus database. Data analysis, conducted with R, assessed the impact of PjBL using effect size (ES) measurements. The findings demonstrate that PjBL significantly improves creative thinking skills compared to traditional teaching methods. Moderator analysis revealed that variables such as educational level, subject area, and learning model influence the outcomes, with the highest impact observed in high school and inquiry-driven subjects like physics. Variations of PjBL, including technology-enhanced models, such as Google Classroom-based approaches, further amplified its effectiveness, particularly in virtual learning environments. This study highlights PjBL’s adaptability and robust potential in fostering creativity and innovation across diverse educational contexts. The results provide practical implications for educators in designing tailored PjBL strategies to cultivate students’ creative thinking, emphasizing the importance of interdisciplinary approaches and technological integration in modern education.
Exploring The Efficacy of Drill and Practice Methods in Improving Student Engagement and Learning Outcomes on The Salt Hydrolysis Topic Fahmina, Shifi Syarifa; Susanti VH, Elfi; Ayni, Ayni
PAEDAGOGIA Vol 26, No 2 (2023): PAEDAGOGIA Jilid 26 No 2 (2023)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/paedagogia.v26i2.75037

Abstract

Effective teaching and improved learning outcomes rely on student engagement and active learning. Interactive, hands-on approaches are particularly valuable in science education for fostering better comprehension of scientific concepts. This research investigates the efficacy of the drill and practice method to enhance student engagement and learning outcomes in salt hydrolysis. The study follows a classroom action research design across two cycles in a public high school in Sukoharjo Regency, Indonesia. Participants were selected purposively due to iden­tified issues in engagement and academic performance. Data collected via cognitive tests, obser­vations, and questionnaires were analyzed descriptively. Results show that implementing the drill and practice method significantly heightened student engagement in salt hydrolysis, with active student percentage rising from 73% (Cycle I) to 88% (Cycle II). Cognitive learning outcomes also improved, progressing from 67% (Cycle I) to 81% (Cycle II). These findings hold significance for science education. The drill and practice approach enhances engagement and understanding, allowing educators to elevate learning outcomes. This method can cultivate engagement and boost learning in similar contexts, such as high school. By embracing interactive strategies, educators foster active participation, aiding students in mastering scientific concepts and addressing engage­ment and performance concerns
Multiple Representation-Based Blended Learning Model for Chemistry Learning in High School Mulyani, Sri; Susanti VH, Elfi; Ariani, Sri Retno Dwi; Utomo, Suryadi Budi; Kharolinasari, Rachma; Panie, Maria Yuliana
PAEDAGOGIA Vol 25, No 1 (2022): PAEDAGOGIA Jilid 25 No 1 (2022)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/paedagogia.v25i1.56298

Abstract

Online distance learning during the COVID-19 outbreak presents new challenges and opportunities for teachers and students. The Blended Learning method is reported to be one of the promising alternatives. However, no specific study revealed the proper blended learning model for chemistry learning that require chemistry representation and can improve critical thinking and problem solving skills at high school level. Qualitative research using phenomenological methods was used in this study. The data collection technique used is using questionnaires, interviews, and documentation. A total of 22 respondents from master students of chemistry education, lecturers and teachers of chemistry education participated in this study. The blended learning model analyzed in this study are Rotational blended learning models (station class, Lab/Whole Group class, flipped class, and Individual), Flex, Self-Blend, and Enriched-Virtual classes. The study results indicate that the blended learning model that the respondents chose the most suitable for multiple representation-based chemistry learning was the Flipped Class model (50%), while the one that was not selected was the Individual Rotation model.
The Effect of a Culturally Responsive Teaching Approach Integrated with Comics with the Think Talk Write Learning Model on Students’ Learning Activities and Achievement in Basic Law of Chemistry Topics Khoirunnisa, Afifah; Mulyani, Bakti; Susanti Vh, Elfi; Yamtinah, Sri; Masykuri, Mohammad; Ulfa, Maria; Shidiq, Ari Syahidul
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 3 (2023): 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.v8i3.80152

Abstract

This study examines the impact of integrating the Culturally Responsive Teaching (CRT) approach with comic-based learning and the Think Talk Write (TTW) model on student learning activities and achievements in fundamental chemistry. Focusing on chemical reactions (combustion, rusting, fermentation, etc.) and laws (Dalton’s, Proust’s, Gay-Lussac’s, etc.), the research adopts a pretest-posttest non-equivalent control group design in a quasi-experimental setting with 36 students divided equally between control and experimental groups. Comparative analysis shows that the experimental group outperforms the control group in learning activities and achievements. The experimental group, subjected to the CRT and TTW model, demonstrates significantly higher engagement in learning activities. The N-Gain Score test reveals a notable increase in learning effectiveness—56.40% for the experimental group versus 29.69% for the control group, indicating the latter's relative ineffectiveness. In learning achievement, the experimental group exhibits a considerable improvement of 67.20%, while the control group shows a moderate gain of 50.12%. The results of the Multivariate Analysis of Variance (MANOVA) test, with the positive effect of integrating CRT with comics and the TTW model on student learning activities and achievements. The study highlights the efficacy of this approach in enhancing students' understanding and engagement in chemistry, suggesting a promising direction for future educational practices.
Green Synthesis and Characterization of 4'-Hydroxy-4-Nitro Chalcone using Grinding Techniques Susanti VH, Elfi; Ariani, Sri Retno Dwi; Mulyani, Sri; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 2 (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.v9i2.80153

Abstract

The challenge of developing environmentally friendly synthesis methods for biologically active compounds remains a significant focus in green chemistry. This study aimed to synthesize 4'-hydroxy-4-nitro chalcone from 4-hydroxyacetophenone and 4-nitrobenzaldehyde using a grinding technique and then characterize the synthesized compounds. The 4'-hydroxy-4-nitro chalcone was synthesized via the Claisen-Schmidt grinding method for 45 minutes at room temperature. The grinding results were extracted with chloroform. The formed crystals were tested for purity by thin-layer chromatography (TLC), and further purification was carried out by recrystallization. The synthesized chalcone was characterized using FTIR, 1H-NMR, and 13C-NMR  spectroscopy. The chalcone was also tested for antibacterial activity using the disc diffusion method against Staphylococcus aureus and Escherichia coli. The results showed that 4'-hydroxy-4-nitro chalcone could be successfully synthesized from 4-hydroxyacetophenone and 4-nitrobenzaldehyde using the grinding technique, yielding orangish-white crystals with a 70.63% yield and a melting point of 173°C. Purity was confirmed by TLC, and structural characterization was achieved through FTIR, 1H-NMR and 13C-NMR spectroscopy. Antibacterial testing revealed that the synthesized chalcone produced a clear zone diameter of 9.27 mm against S. aureus and 27.88 mm against E. coli. These results indicate that the compound has relatively strong antibacterial activity against E. coli and relatively weak activity against S. aureus. This study demonstrates the effectiveness of the green synthesis method and provides valuable insights into the antibacterial properties of 4'-hydroxy-4-nitro chalcone
Development and Characterization of Hand Sanitizer Containing Lempuyang Emprit (Zingiber amaricans BL.) Essential Oil With Zerumbone as The Main Chemical Component Ariani, Sri Retno Dwi; Mulyani, Sri; Susanti Vh, Elfi; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul; Pramesti, Anastasia Diaz
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 1 (2023): 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.v8i1.67055

Abstract

Recently, research on the chemistry of natural products as medicinal has been increasingly developed; this is because natural products have many chemical components, have the potential biological activities without side effects, and are easy to obtain. One of these natural products is Lempuyang Emprit (Zingiber amaricans BL.) essential oil. The researchers guided UKM Suti Sehati to develop a new product: a hand sanitizer containing Lempuyang Emprit essential oil (LEEO). This study aims to make ten hand sanitizer formulas by varying LEEO concentrations and determine the best formula based on the physical properties and antibacterial activities. The best formulation obtained was then optimized with variations in fragrance concentration. The best product was selected by a hedonic test using 30 untrained panelists based on the parameters of color, scent, texture, pH, homogeneity, speed of drying, causing no red skin, causing no pain, and causing no dry skin. The antibacterial activity tests were performed against Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 using the disk method. The LEEO isolation was carried out using steam and water distillation methods, and the chemical components of the best product was identified using the GC-MS method. Based on the hedonic test, the best hand sanitizer product contains 1.5% LEEO and 3% fragrance. This product has a strong antibacterial activity value against S. aureus ATCC 25923, with an inhibition zone of 15.95 mm, and a moderate value against E. coli ATCC 25922, with an inhibition zone of 9.42 mm. The hand sanitizer product contains 21.35% of Zerumbone and exhibits antibacterial and antioxidant capabilities.
Co-Authors Ari Syahidul Shidiq Ayni, Ayni Bakti Mulyani Fahmina, Shifi Syarifa Hasibuan, Molani Paulina Kharolinasari, Rachma Khoirunnisa, Afifah Maria Ulfa Mohammad Masykuri Panie, Maria Yuliana Pramesti, Anastasia Diaz Rahmadina, Salsabila Adzani Sri Mulyani Sri Retno Dwi Ariani Sri Yamtinah Suryadi Budi Utomo Wathon, Muhammad Hizbul Widha Sunarno