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All Journal Jurnal Pendidikan Indonesia Carmin: Journal of Community Service Molekul: Jurnal Ilmiah Kimia
Elfi Susanti Van Hayus
Universitas Sebelas Maret
Humanities Biochemistry, Genetics & Molecular Biology Chemistry Education Materials Science & Nanotechnology Social Sciences

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Optimization of Hand Sanitizer Formulation with the Addition of Lemongrass (Cymbopogon citratus (DC.) Stapf) Essential Oil and a Combination of Essential Oils of Local Indonesian Empon-empon Ariani, Sri Retno Dwi; Van Hayus, Elfi Susanti; Mulyani, Sri; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul; Bilhaq, Natiq; Pramesti, Anastasia Diaz
Molekul Vol 19 No 2 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.2.10186

Abstract

ABSTRACT: This research aimed to optimize the formulation of hand sanitizer by incorporating lemongrass (Cymbopogon citratus (DC.) Stapf) essential oil in combination with essential oils of local Indonesian empon-empon: temu giring (Curcuma heyneana Val. & van Zipj.), temu kunci (Kaempferia pandurata Roxb.), and temu mangga (Curcuma amada Roxb.). The optimization of hand sanitizer formulation was done based on several tests. The first was organoleptic test by observing the aroma, color, and form; the second was pH, homogeneity, and spreadability testing, and; the third was testing the antibacterial activities of each hand sanitizer formula against Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25922. The research stages encompassed isolation of essential oils, formulation and evaluation of hand sanitizers, antibacterial activities test, optimization of hand sanitizer formulation, and identification of the chemical compounds in the hand sanitizer with the optimum formulation using the GC-MS method. The study resulted in the hand sanitizer with the optimum formulation containing the essential oils of lemongrass (3%) and temu giring (3%), demonstrating very strong antibacterial bioactivities against both E. coli ATCC 25922 and S. aureus ATCC 25923, with inhibition zones measuring 29.70 mm and 60.08 mm, respectively. This hand sanitizer had a distinctive aroma, combining the scents of lemongrass and temu giring. It was in liquid form, clear, and homogeneous, with pH and spreadibility values of 5.4 and 6.4 cm, respectively. The quality complied with SNI quality standards No. 06-2588. The primary active ingredients were E-citral (22.10%), Z-citral (17.88%), and 1,8-cineol (17.63%). Keywords: Essential oil, hand sanitizer, lemongrass, temu giring, temu kunci, temu mangga.
Problem-Based Learning Model on Students' Chemical Literacy and Critical Thinking on Reaction Rate Material Fareza, Fadhila Shafa; Van Hayus, Elfi Susanti; Ari Syahidul Shidiq; Sri Yamtinah; Mohammad Masykuri; Maria Ulfa; Agung Nugroho Catur Saputro; Bakti Mulyani
Jurnal Pendidikan Indonesia Vol 13 No 3 (2024): September
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpiundiksha.v13i3.79331

Abstract

This study was motivated by students'students' low chemical literacy skills and critical thinking skills. One way to overcome this problem is to actively use a learning model involving students, such as problem-based learning (PBL). This research aims to analyze the effect of PBL on students' chemical literacy and critical thinking skills. This study used a quantitative approach with a quasi-experimental method. The research design used was a non-equivalent control group design. The sample selection technique used was cluster random sampling, which was done by selecting 70 second-grade high school students. Data collection using tests with instruments in the form of essay test sheets regarding posttest chemical literacy skills with as many as seven questions and posttest critical thinking skills with as many as five questions. Data analysis techniques using non-parametric statistical tests. Hypothesis testing using the Kruskal-Wallis test. The results showed a significant difference between students taught with the PBL model and students who were not trained with the model. Applying the PBL model is proven to affect students' chemical literacy and critical thinking skills. Thus, it can be concluded that the application of PBL can significantly improve students' chemical literacy and essential thinking skills compared to learning methods that do not use the model. This study implies that problem-based learning models can influence students' chemical literacy and critical thinking skills with implementation tailored to the context and material in this study, namely reaction rates.
Lokakarya Pengembangan Subject Spesific Pedagogy (SSP) Berbasis STEAM (Science Technology Engineering Art and Mathematics) bagi Guru Kimia SMA Setyowati, Widiastuti Agustina Eko; Van Hayus, Elfi Susanti; Mulyani, Sri; Ariani, Sri Retno Dwi; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul
Carmin: Journal of Community Service Vol. 5 No. 1 (2025)
Publisher : Borneo Research and Education Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59329/carmin.v5i1.146

Abstract

Telah dilaksanakan Lokakarya Pengembangan Subject Specific Pedagogy (SSP) berbasis Science Technology Engineering Art and Mathematics (STEAM) bagi Guru Kimia SMA. Berdasarkan diskusi antara tim Pengabdian kepada Masyarakat (PkM) Kelompok Riset Bahan Alam, Rekayasa Molekuler, dan Pembelajaran Kimia dengan Ketua MGMP Kimia Surakarta, salah satu permasalahan guru kimia di Surakarta adalah sebagian besar guru kimia masih jarang mengintegrasikan unsur STEAM dalam pembelajaran, khususnya integrasi STEAM dengan SSP. Tujuan dari lokakarya ini adalah untuk memberikan keterampilan kepada peserta dalam mengembangkan instrumen kontekstual yang relevan. Lokakarya ini diharapkan dapat meningkatkan profesionalisme dan pemenuhan Rencana Hasil Kerja Guru dalam Platform Merdeka Mengajar (RHK PMM). PkM dilaksanakan dengan metode Asset Based Community Development (ABCD), terdiri atas Discovery (menemukan), Dream (impian), Design (prosedur), Define (pemantapan tujuan), dan Destiny (self determination) yang secara umum dilaksanakan dalam 3 tahap kegiatan, yaitu: 1) persiapan, 2) pelaksanaan, dan 3) evaluasi. Lokakarya yang diselenggarakan berhasil meningkatkan profesionalisme guru kimia dalam kurikulum Merdeka. Melalui pretest dan posttest yang diberikan, terjadi peningkatan pengetahuan peserta terkait materi SSP berbasis STEAM sebesar 19,86 % dengan N-gain sebesar 0,585 (sedang). Berdasarkan hasil tersebut dapat disimpulkan bahwa kegaiatan lokakarya yang dilaksanakan dapat meningkatkan pemahaman dan penguasaan materi SSP berbasis STEAM dengan kategori sedang. Meningkatnya jumlah jawaban benar pada posttest menunjukkan bahwa kegiatan lokakarya berjalan dengan baik sehingga memberikan dampak positif bagi guru dalam hal pemahaman dan cara penerapan STEAM dalam pembelajaran, khususnya dalam hal pengembangan SSP. Selain itu kegiatan lokakarya ini mampu menghasilkan output berupa SSP berbasis STEAM yang berkualitas.
Co-Authors Agung Nugroho Catur Saputro Ari Syahidul Shidiq Bakti Mulyani Bilhaq, Natiq Fareza, Fadhila Shafa Maria Ulfa Mohammad Masykuri Pramesti, Anastasia Diaz Setyowati, Widiastuti Agustina Eko Sri Mulyani Sri Retno Dwi Ariani Sri Yamtinah Suryadi Budi Utomo Wathon, Muhammad Hizbul