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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Indonesian Journal of Science and Technology Jurnal Tadris Kimiya Jurnal Pengabdian Isola
Rosi Oktiani
Universitas Pendidikan Indonesia
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Other

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How to Read and Interpret FTIR Spectroscope of Organic Material Nandiyanto, Asep Bayu Dani; Oktiani, Rosi; Ragadhita, Risti
Indonesian Journal of Science and Technology Vol 4, No 1 (2019): IJOST: VOLUME 4, ISSUE 1, 2019
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v4i1.15806

Abstract

Fourier Transform Infrared (FTIR) has been developed as a tool for the simultaneous and quantitative determination of organic components, including chemical bond, as well as organic content (e.g. protein, carbohydrate and lipid). However, until now, there is no further information for the detailed information in the FTIR peaks. The objective of this study was to demonstrate how to read and assess chemical bond and structure in the organic material. The analysis was then compared with the literatures. The step-by-step method on how to read the FTIR data was presented, including reviewing simple to the complex organic materials. This study is potential to be used as a standard information on how to read FTIR peaks in the biochemical and organic materials.
A Simple, Rapid Analysis, Portable, Low-cost, and Arduino-based Spectrophotometer with White LED as a Light Source for Analyzing Solution Concentration Asep Bayu Dani Nandiyanto; Rena Zaen; Rosi Oktiani; Ade Gafar Abdullah; Lala Septem Riza
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 2: April 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i2.7159

Abstract

The purpose of this study was to demonstrate a simple, rapid analysis, portable, and inexpensive spectrophotometer. Different from other spectrophotometers, the present instrument consisted of a single white light-emmiting-diode (LED) as a light source, a light sensor, and arduino electronic card as an acquisition system. To maintain a constant light intensity, a common white-color LED emitting a 450-620 nm continous spectrum was employed. Software was written in C++ to control photometer through a USB interface and for data acquistion to the computer. The instrument is designed to be simple and compacted with sizes of 200 x 130 x 150 mm for length, width, and height, respectively. The analysis of the total cost isabout less than 500 USD, while commercially available offers price of more than 10,000 USD. Thus, this makes the present instrument feasible for teaching support media in developing countries. The effectiveness of the present spectrophotometer for analyzing solution concentration (i.e. curcumin) was also demonstrated. Interestingly, the present spectrophotometer is able to measure the concentration of curcumin precisely with an accuracy of more than 90%. Different from commercially available standard UV-visible spectrophotometers that have limitations in the analysis of concentration of less than 50 ppm, the present system can measure the concentration with no limitation since the measurement is based on the LED light being penetrated.
An Assistance in Writing Research Proposals for Teacher in Chemistry Subject Teacher Deliberation and Madrasah Aliyah Students in Tasikmalaya [Pendampingan Penulisan Proposal Penelitian Guru MGMP Kimia dan Siswa Madrasah Aliyah di Tasikmalaya] Supriyanti, Florentina Maria Titin; Oktiani, Rosi; Hendrawan, Hendrawan; Musthapa, Iqbal; Khoerunnisa, Fitri; Aisyah, Siti; Fatimah, Soja Siti; Mahmudah, Eneng
Jurnal Pengabdian Isola Vol 3, No 1 (2024): JPI: VOLUME 3, ISSUE 1, 2024
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jpi.v3i1.71498

Abstract

Pengabdian kepada masyarakat ini bertujuan untuk melakukan pendampingan penulisan proposal penelitian bagi siswa Madrasah Aliyah (MA) dan anggota Musyawarah Guru Mata Pelajaran (MGMP) Kimia di kabupaten Tasikmalaya. Kegiatan pengabdian dilaksanakan dalam tiga tahapan, dengan tahap 1, 2, dan 3 berturut-turut dilakukan secara online-offline-online. Dari hasil workshop P2M ini diperoleh kesimpulan bahwa kegiatan pembinaan siswa MA dan guru-guru MGMP Kimia di wilayah Tasikmalaya terlaksana dengan baik pada setiap tahapnya. Kegiatan ini telah membantu siswa dalam menyusun draf proposal penelitian Olimpiade Penelitian Siswa Indonesia (OPSI). Dari kegiatan ini diperoleh 13 judul proposal yang dianggap layak untuk diikutsertakan pada kegiatan OPSI. Dari seluruh judul tersebut, terdapat 11 judul proposal yang berhasil lolos seleksi.This community service aims to provide an assistance in writing research proposals for the members of chemistry subject teacher deliberation (MGMP) and Madrasah Aliyah students in Tasikmalaya. The community service activities were carried out in three stages, with stages 1, 2, and 3 conducted online, offline, and online, respectively. Based on the results of this workshop, we concluded that the assistance program was executed effectively at every stage. This program helped students in preparing a draft research proposal for the Indonesian Student Research Olympiad (OPSI). Through this program, we generated 13 proposal titles deemed suitable for participation in OPSI. Out of these titles, 11 successfully passed the selection process.
Chemistry Teachers’ Perspectives on the Implementation of Interdisciplinary Science Projects in Vocational Schools: Challenges and Strategic Solutions Lestari, Devy; Oktiani, Rosi; Lutfianasari, Ulfa; Imaduddin, Muhamad
Jurnal Tadris Kimiya Vol 10 No 1 (2025)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v10i1.37830

Abstract

The integration of interdisciplinary approaches in science education has gained increasing prominence, particularly within vocational school contexts. The research aims to identify the challenges faced by these teachers and to explore potential solutions for improving project-based instruction within the framework of Indonesia’s Merdeka Curriculum. This study investigates the perspectives of chemistry education graduates who are currently implementing interdisciplinary science projects in vocational schools across Central Java, East Java, and the Special Region of Yogyakarta. Employing a qualitative descriptive design, data were gathered from 25 purposively selected participants using an online open-ended questionnaire. Thematic analysis revealed several core challenges: limited pedagogical competence in project-based learning, difficulties in synthesizing natural and social science content, insufficient laboratory infrastructure and teaching materials, and restrictive curriculum policies that constrain instructional flexibility. These issues were especially pronounced among teachers with mono-disciplinary backgrounds in chemistry, who are now required to deliver integrated and contextualized learning. In response, the participants proposed actionable strategies, including training in contextual and project-based methodologies, mastery of interdisciplinary content, enhanced professional collaboration through musyawarah guru mata pelajaran (MGMP)  / subject teacher forums, improved access to instructional resources, and flexible curriculum design. The study highlights the need for comprehensive and systemic support to enhance teachers’ capacity to deliver meaningful and vocationally relevant interdisciplinary science education. The findings provide critical insights for policymakers, curriculum developers, and teacher education institutions aiming to advance the implementation of holistic STEM education in vocational settings.
Workshop On Small-Scale Distillation for Chemistry Teachers to Support the Implementation of Education for Sustainable Development in Banten Province [Workshop Destilasi Skala Kecil bagi Guru Kimia untuk Mendukung Implementasi Education for Sustainable Development di Provinsi Banten] Oktiani, Rosi; Liliasari, Liliasari; Siswaningsih, Wiwi; Rahmawati, Triannisa; Suhanda, Hokcu; Mubarokah, Febriati Dian; Rifa, Hasna Athaya
Jurnal Pengabdian Isola Vol 4, No 1 (2025): JPI: VOLUME 4, ISSUE 1, 2025
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jpi.v4i1.83542

Abstract

Implementasi Education for Sustainable Development (ESD) di sekolah, perlu didukung dengan kompetensi guru dalam mengintegrasikan pendekatan ESD melalui pembelajaran. Kegiatan pengabdian kepada masyarakat ini bertujuan memberikan pengetahuan dan keterampilan baru bagi guru kimia di Provinsi Banten dalam mengimplementasikan ESD melalui eksperimen kimia skala kecil. Kegiatan ini dilakukan dengan metode workshop isolasi minyak sereh wangi melalui destilasi uap menggunakan small-scale kit. Evaluasi keberhasilan kegiatan workshop ini dilakukan menggunakan kuesioner respon guru terhadap kegiatan workshop yang telah dilakukan. Kegiatan workshop telah berhasil meningkatkan pengetahuan dan keterampilan guru dalam menggunakan small-scale kit untuk mengurangi penggunakan bahan kimia pada pembelajaran kimia berbasis eksperimen. Hal ini dapat mendukung implementasi ESD dalam pembelajaran kimia di sekolah, khususnya di Provinsi Banten.Implementing Education for Sustainable Development (ESD) in schools requires teachers to be competent in integrating the ESD approach into their teaching. This community service initiative aims to equip chemistry teachers in Banten Province with new knowledge and skills for implementing ESD through small-scale chemistry laboratory activity. This activity was conducted using a workshop method to isolate citronella oil through steam distillation with a small-scale kit. To evaluate the success of the workshop, participants completed a questionnaire assessing their experience. Through this activity, teachers succeeded in gaining new knowledge and skills in using small-scale kits to reduce the use of chemicals in laboratory activity-based chemistry learning. This program supports the implementation of ESD in chemistry education in schools throughout Banten Province.
Co-Authors Ade Gafar Abdullah, Ade Gafar Asep Bayu Dani Nandiyanto Fitri Khoerunnisa Florentina Maria Titin Supriyanti Hendrawan Hendrawan Hokcu Suhanda Iqbal Musthapa Lala Septem Riza Lestari, Devy Liliasari , Lutfianasari, Ulfa Mahmudah, Eneng Mubarokah, Febriati Dian Muhamad Imaduddin Ragadhita, Risti Rena Zaen Rifa, Hasna Athaya Siti Aisyah Soja Siti Fatimah Triannisa Rahmawati, Triannisa Wiwi Siswaningsih