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ELEKTROLISIS H2O MENGGUNAKAN ELEKTRODE STAINLESS STEEL DALAM SUASANA BASA DENGAN MEDIA TEPUNG MAIZENA (H2O ELECTROLYSIS USING STAINLESS STEEL ELECTRODE WITH CORNSTARCH) Dhaulika Maysarrah; Isana Supiah Yosephine Louise
Jurnal Elemen Kimia Vol 5, No 3 (2016): Volume 5, No 3, Edisi 3 tahun 2016
Publisher : Universitas Negeri Yogyakarta

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Penelitian ini bertujuan untuk mengetahui aktivitas elektrode stainless steel dan mengetahui kondisi optimal elektrogenerasi gas hidrogen pada elektrolisis air dalam media tepung maizena. Subjek penelitian ini adalah elektode stainless steel, objeknya adalah aktivitas elektrode stainless steel dan efisiensi evolusi gas H2. Proses produksi gas H2 dilakukan dengan metode elektrolisis katalis NaHCO3 secara voltametri siklik, dengan dilakukan variasi penambahan media tepung maizena sebesar: 0 - 10 gram.Penggunaan elektrode stainless steel pada proses elektrolisis dengan media tepung maizena secara voltametri siklik memberikan hasil kurang baik bila dibandingkan dengan elektrolisis tanpa media tepung maizena. Kondisi optimal proses elektrolisis menggunakan elektrode stainless steel terjadi pada penambahan 1 gram tepung maizena.

Implementation of Electronic Module Based Multiple Representation on Buffer Solution Materials to Improve Studentsâ€™ Self-Regulated Learning and Cognitive Learning Outcomes Irfan Kamaludin Syam; Isana Supiah Yosephine Louise
Jurnal Penelitian Pendidikan IPA Vol. 9 No. 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.3656

This research aims to determine the differences between self-regulated learning (SRL) and cognitive learning outcomes (CLO) of students who use multiple representation-based e-modules with students who use other teaching materials without being based on multiple representations on buffer solution materials and to determine the percentage of effective contribution. The subjects of this study were students of class XI MIPA at one of the high schools in Yogyakarta. The sampling technique carried out is cluster random sampling with a quasi-experiment method by posttest-only control group design. The instruments used are questionnaires on self-regulated learning and cognitive learning outcomes. The data analysis technique used in the field test results used Hotelling's Trace test and the results of effective contribution were obtained from the Partial Eta Squared value. The results showed that the significance value of 0.000 < 0.05 so that H0 was rejected, which means that there are differences in SRL and CLO of students between students who use multiple representation-based e-modules and students who use other teaching materials without multiple representations based on buffer solution materials. The percentage of effective contribution of the use of e-modules to SRL by 16.5%, CLO by 11.8%, and SRL and CLO by 20.3%.

Pendampingan pembuatan souvenir dari sampah anorganik Rohaeti, Eli; Yosephine Louise, Isana Supiah; Budiasih, Kun Sri; Arianingrum, Retno; Aznam, Nurfina; Mercuriani, Ixora Sartika; Fitriyana, Nur; Rinawati, Wika
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 8 No. 2 (2024): Vol 8, No 2 (2024)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v8i2.69891

Permasalahan yang akan dicarikan solusinya, yaitu mencari solusi terhadap penumpukkan limbah anorganik yang dihasilkan oleh kegiatan masyarakat, meningkatkan literasi masyarakat tentang pengolahan limbah anorganik, serta meningkatkan keterampilan masyarakat dalam mengolah limbah anorganik menjadi berbagai produk souvenir sehingga masalah lingkungan dan ekonomi dapat terselesaikan. Tujuan kegiatan pelatihan pendampingan ini, yaitu untuk meningkatkan pemahaman masyarakat terkait cara pengolahan sampah anorganik serta untuk meningkatkan keterampilan masyarakat dalam mengolah sampah anorganik menjadi berbagai produk souvenir yang memiliki nilai ekonomi tinggi. Solusi yang ditawarkan yaitu melalui kegiatan pelatihan dan pendampingan cara mengolah limbah anorganik menjadi berbagai produk souvenir seperti bros, tempat pensil, dompet, dan tas, menjadi media tanam, dan ecobrick. Target pelatihan yaitu para pemuda, warga masyarakat sekitar Taman Kyai Langgeng (TKL) Magelang, serta para pendidik di lingkungan kota Magelang. Hasil kegiatan pelatihan menunjukkan adanya peningkatan pengetahuan dan keterampilan peserta, terutama dalam mengolah limbah anorganik, kesempatan kepada peserta dan mitra untuk membiasakan diri peka terhadap lingkungan, terutama pemisahan sampah/limbah anorganik dari rumah tangga atau lingkungan sekitar dan mampu mengolahnya menjadi produk bermanfaat dan bernilai ekonomi, serta mempraktekkannya dalam kehidupan sehari-hari.

PENDAMPINGAN PENGOLAHAN LIMBAH ORGANIK MENJADI ECOENZYME BAGI GURU-GURU SMP SEKABUPATEN MAGELANG Yosephine Louise, Isana Supiah; Rohaeti, Eli; Aznam, Nurfina; Arianingrum, Retno; Budiasih, Kun Sri; Mercuriani, Ixora Sartika; Rinawati, Wika; Fitriyana, Nur
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 8 No. 2 (2024): Vol 8, No 2 (2024)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v8i2.71193

Sampah rumah tangga umumnya berupa sampah organik, demikian juga limbah/sampah pedagang lotis/rujak, jus, sayur dan buah, yang umumna hanya dibuang begitu saja, menumpuk dan menyebabkan aroma tidak sedap dan menyebabkan sarang lalat, yang berakibat terhadap kesehatan masyarakat sekitar. Untuk itu perlu diupayakan pengolahan limbah rumah tangga, penjual lotis/rujak, jus, sayur dan buah yang berupa limbah/sampah organik menjadi produk yang bermanfaat dan memiliki nilai ekonom. Pada kegiatan pendampingan guru-guru SMP se-Kabupaten Magelang dengan dana dari Program MF (Matching Fund) 2023 (Ristekdikti) telah dikenalkan produk ecoenzim sebagai produk fermentasi limbah/sampah organik, yang memiliki banyak manfaat, antara lain, pupuk, insektisida, dan memiliki khasiat obat (obat luar). Selama kegiatan pendampingan, peserta tidak hanya dikenalkan produk ecoenzim secara teori, tetapi langsung mempraktekkan pembuatan ecoenzim, dengan bahan-bahan dan peralatan yang telah disediakan. Peserta sangat menikmati dan sangat bersemangat selama pendampingan, secara umum peserta menyatakan bahwa kegiatan ini sangat bermanfaat, penyampaian materi dapat diterima dnegan sangat baik, metoda yang digunakan sangat sesuai dan kegiatan ini sangat membantu membuka wawasan peserta pendampingan.

Aplikasi variasi jumlah pelat elektroda Al-Fe pada pengurangan mikroplastik dalam limbah masker secara elektrokoagulasi Marwati, Siti Marwati; Yosephine Louise, Isana Supiah; Padmaningrum, Regina Tutik; Rahmawati, Aprilia; Hamida, Zahra; Julia, Ardhita
Jurnal Penelitian Saintek Vol 28, No 2 (2023)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i2.67098

Penelitian ini bertujuan untuk mengetahui pengaruh jumlah pelat elektroda Fe-Al pada pengurangan mikroplastik dalam limbah masker secara elektrokoagulasi. Sampel penelitian adalah limbah masker medis. Masker dipotong-potong dengan ukuran 1-5 mm. Potongan masker tersebut direndam dalam aquades selama 7 hari. Cairan yang mengandung mikroplastik dielektrokoagulasi dengan kombinasi pelat elektroda (Al-Fe), (Al-Fe-Al), dan (Al-Fe-Al-Fe) selama 4 jam, arus listrik 2,5 A dan pH 6,0. Serat mikroplastik sebelum dan sesudah elektrokoagulasi diamati dengan mikroskop perbesaran 40 kali. Karakterisasi mikroplastik dilakukan dengan menggunakan FTIR (Fourier Transform Infra Red) dan SEM (Scanning Electron Microscope). Hasil penelitian menunjukkan bahwa efektifitas pengurangan mikroplastik yang dielektrokoagulasi menggunakan kombinasi pelat elektroda (Al-Fe), (Fe-Al-Fe), (Al-Fe-Al-Fe) berturut-turut adalah 82,5; 87,5; dan 90,0%. Semakin banyak jumlah pelat pada elektrokoagulasi mikroplastik dapat meningkatkan efektifitas pengurangan mikroplastik. Gugus fungsi yang terkandung dalam masker sebelum dan sesudah elektrokoagulasi mempunyai kemiripan dengan flok yang dihasilkan. Gumpalan Flok hasil elektrokoagulasi berbentuk variatif dan terdapat serat.Kata kunci: elektroda, elektrokoagulasi, masker, mikroplastik, pelat Fe-Al Application of variation in Al-Fe electrode plates to reduce microplastics in masks waste by electrocoagulationAbstract: This study investigates how the number of Fe-Al electrode plates affects electrocoagu-lation's effectiveness in decreasing mask waste microplastics. The sample in this study was medical mask waste. The mask is chipped into 1-5 mm pieces. The pieces of the mask are soaked in distilled water for seven days. Liquid-containing microplastics were electrocoagulated with a combination of Fe-Al, Fe-Al-Fe, and Fe-Al-Fe-Al electrode plates for 4 hours at an electric current of 2.5 A and a pH of 7.0. Microplastic fibers before and after electrocoagulation were observed with a forty-fold magnification microscope. Microplastic characterization was carried out using FTIR (Fourier Transform Infra Red) and SEM (Scanning Electron Microscope). The results showed that the effectiveness of electrocoagulation microplastics using a combination of electrode plates (Fe-Al), (Fe-Al-Fe), and (Fe-Al-Fe-Al) was 82.5, 85.0, and 87.5%, respectively. The efficiency of microplastic reduction can be improved by using more plates in microplastic electrocoagulation. The functional groups contained in the masks before and after electrocoagulation are similar to the flocs produced. Floc clumps resulting from electrocoagulation are varied in shape and contain fibers.Keywords: electrocoagulation, electrode, face mask, microplastic

The Effect of PjBL-Based Electronic LKPD Integrated with STEM on Reaction Rate Material on Problem-Solving Ability and Self-Efficacy of Students Halimatuzzahra*, Halimatuzzahra; Louise, Isana Supiah Yosephine; Kamari, Azlan bin
Jurnal Pendidikan Sains Indonesia Vol 13, No 2 (2025): APRIL 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jpsi.v13i2.44858

Problem-solving skills can be influenced by the independent curriculum currently used in Indonesia. Merdeka curriculum gives schools the freedom to design learning programs that align with student needs and local conditions. This quantitative research aims to analyze the effect of using electronic student worksheet (LKPD) based on STEM-integrated project based learning (PjBL) on the problem-solving ability (PSA) and self-efficacy of students simultaneously or individually. This research is a quasi-experimental research with a posttest-only control group design. The trial was conducted at SMAN 13 Banjarmasin consisting of one experimental class and one control class selected using a random sampling technique of the class. Data on the PSA and self-efficacy of students obtained from experimental and control classes were analyzed using the Manova test. The results of this study indicate the influence of PSA and student self-efficacy simultaneously and respectively. The effective contribution to PSA and self-efficacy of students simultaneously is 0.419 in the very large category. In addition, the effective contribution to students' PSA is 0.225, and to students' self-efficacy is 0.379, both of which fall into the very large category.

Implementation of Project-Based Learning in Improving Students' Problem-Solving in Chemistry Learning: A Systematic Literature Review Halimatuzzahra, Halimatuzzahra; Louise, Isana Supiah Yosephine
Jurnal Pendidikan MIPA Vol 26, No 2 (2025): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v26i2.pp810-822

One of the 21st-century skills that needs to be developed is problem-solving. Problem-solving ability is understanding problems, planning solutions, applying solutions, evaluating, and finding solutions to problems. In fact, problem-solving ability in chemistry learning is still low, so a strategy is needed to overcome this problem, one of which is the application of project-based learning. Project-based learning is a learning model that involves students directly in the learning process through research activities. This study aims to evaluate the effect of implementing the Project-Based Learning (PjBL) model on students' problem-solving skills in learning chemistry. The method used is a Systematic Literature Review (SLR). Articles were obtained from Google Scholar, Scopus, and DOAJ, and 9 articles met the inclusion criteria set and were analyzed further. The results of the analysis show that the PjBL model has a positive influence on students' problem-solving skills. Project-based learning allows learners to be creative, work together, and develop solutions within a particular time, improving their collaboration, communication, and critical thinking skills. Implementing PjBL also provides a more interesting and realistic learning experience, helping learners understand the learning material and practice practical skills. Overall, implementing PjBL shows positive results in achieving chemistry learning objectives in cognitive, affective, and psychomotor domains. Keywords: chemistry learning, problem-solving, project-based learning.

Isotherm and Kinetic Studies of Malachite Green by NaOH-Activated Carbon Made from Apple Waste Balasubramaniam, Narayani; Louise, Isana Supiah Yosephine
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.104046

Using textile dyes that seem to reach new heights has caused the waste produced to skyrocket. One is malachite green, which earned its popularity due to its vibrancy. However, the impact of malachite green has proven to be an adversary to the environment, aquaculture, and health. This experiment aims to analyze the removal of malachite green through adsorption by using activated carbon made from apple waste. Some activated carbon underwent activation with NaOH 0.5 M. We sieved these activated carbons into a 100 mesh and used the batch method to test them for optimal conditions. The concentration at equilibrium was analyzed using cyclic voltammetry. The results of these experiments are modeled into isotherm and kinetics models to help describe the adsorption. SEM-EDS, FTIR, and SAA also characterized the adsorbent samples. We found the NaOH-activated carbon to be the most efficient adsorbent, with optimum conditions of 0.3 g, 20 min, and 200 ppm. The adsorption data followed the Dubinin-Radushkevich isotherm and the pseudo second-order kinetics.

Pengaruh Praktikum Green Chemistry terhadap Keterampilan Proses Sains dan Kesadaran Lingkungan pada Materi Faktor Laju Reaksi Kamilah, Izza; Louise, Isana Supiah Yosephine
Jurnal Pendidikan Matematika dan Sains Vol. 13 No. Special_issue (2025): Integrasi Pendidikan Matematika dan Sains dalam Mendukung Sustaina
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpms.v13iSpecial_issue.89688

Penelitian ini bertujuan untuk membandingkan keterampilan proses sains dan kesadaran lingkungan antara siswa yang mengikuti praktikum green chemistry dengan siswa yang mengikuti praktikum konvensional sesuai yang diterapkan di sekolah secara simultan dan terpisah, serta mengetahui sumbangan efektifnya pada materi faktor laju reaksi. Jenis penelitian adalah quasi-eksperimen dengan posttest-only. Teknik pengambilan sampel menggunakan cluster random sampling. Instrumen penelitian meliputi soal uraian dan lembar observasi keterampilan proses sains, serta angket kesadaran lingkungan. MANOVA digunakan pada analisis data penelitian ini. Hasil penelitian menunjukkan perbedaan yang signifikan terhadap keterampilan proses sains dan kesadaran lingkungan antara siswa yang mengikuti praktikum green chemistry dengan yang mengikuti praktikum konvensional. Praktikum green chemistry memberikan sumbangan efektif sebesar 29,3% secara simultan, 4,7% terhadap keterampilan proses sains, dan 28,3% terhadap kesadaran lingkungan. Penelitian ini juga mendukung Sustainable Development Goals (SDGs) mengenai pendidikan berkualitas melalui penguatan keterampilan proses sains, serta konsumsi dan produksi yang bertanggung jawab, melalui praktik laboratorium ramah lingkungan.

Implementation of Electronic Module Based Multiple Representation on Buffer Solution Materials to Improve Studentsâ€™ Self-Regulated Learning and Cognitive Learning Outcomes Syam, Irfan Kamaludin; Louise, Isana Supiah Yosephine
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.3656

This research aims to determine the differences between self-regulated learning (SRL) and cognitive learning outcomes (CLO) of students who use multiple representation-based e-modules with students who use other teaching materials without being based on multiple representations on buffer solution materials and to determine the percentage of effective contribution. The subjects of this study were students of class XI MIPA at one of the high schools in Yogyakarta. The sampling technique carried out is cluster random sampling with a quasi-experiment method by posttest-only control group design. The instruments used are questionnaires on self-regulated learning and cognitive learning outcomes. The data analysis technique used in the field test results used Hotelling's Trace test and the results of effective contribution were obtained from the Partial Eta Squared value. The results showed that the significance value of 0.000 < 0.05 so that H0 was rejected, which means that there are differences in SRL and CLO of students between students who use multiple representation-based e-modules and students who use other teaching materials without multiple representations based on buffer solution materials. The percentage of effective contribution of the use of e-modules to SRL by 16.5%, CLO by 11.8%, and SRL and CLO by 20.3%.

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