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All Journal International Journal of Evaluation and Research in Education (IJERE) Cakrawala Pendidikan Jurnal Kependidikan: Penelitian Inovasi Pembelajaran JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Penelitian Saintek Jurnal Penelitian Humaniora Jurnal Pendidikan Kimia Indonesia Jurnal Sains Dasar Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Alchemy Jurnal Penelitian Kimia Jurnal Inovasi Pendidikan IPA Jurnal Tadris Kimiya Jurnal Penelitian Pendidikan IPA (JPPIPA) JOURNAL OF KOMODO SCIENCE EDUCATION Psychology, Evaluation, and Technology in Educational Research Molekul: Jurnal Ilmiah Kimia Jurnal Pendidikan dan Kebudayaan Missio Indonesian Journal of Chemistry and Environment Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia
A.K Prodjosantoso A.K Prodjosantoso
Departement Of Chemistry Education, Postgraduate Program, Yogyakarta State University, Jl. Colombo No.1, Karang Malang, Yogyakarta, 55281
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Improving critical thinking skills and scientific attitudes by using comic Mufida Awalia Putri; Anti Kolonial Prodjosantoso
Psychology, Evaluation, and Technology in Educational Research Vol. 2 No. 2 (2020)
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/petier.v2i2.13

Abstract

The objective of the study is to identify the fitness and the effectiveness of the comic that has been developed using Guided Inquiry Technique in improving the students’ critical thinking skills and scientific attitudes for the learning process of Natural Science. The study itself is a research and development initiative that has adapted the model proposed by Borg & Gall. Within the conduct of the study, the limited experiment by means of one-group pre-test and post-test design had been conducted. On the other hand, within the conduct of the operational test, the quasi-experiment design in the form of non-equivalent pre-test post-test control group design had been adopted. The results of the study, thus, show that: (1) the Natural Science comic media has been fit for implementation with the “Very Good” category; and (2) the Natural Science comic media has been active in significantly improving the students’ critical thinking skills. The mean score for the critical thinking skills of the students in the control group is 0.74 with the “High” category. In contrast, the mean score for the critical thinking skills of the students in the experimental group is 0.87 with the “High” category. In the same time, it is apparent that the improvement of the scientific attitude between the students in the control group and the students in the experimental group has been significant.
The Influence of pH on the Nitrogen-doped TiO2 Structure and Its Photocatalytic Activity on Methylene Blue Degradation Cahyorini Kusumawardani; Kristiyan Handoyo Sugiyarto; Anti Kolonial Prodjosantoso
Molekul Vol 16, No 3 (2021)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (782.37 KB) | DOI: 10.20884/1.jm.2021.16.3.804

Abstract

The mesoporous nitrogen-doped titania (N-doped TiO2) has been synthesized through sol-gel method by refluxing the precursor mixture, continued by hydrolysis process, and then followed by annealing in air at the desired temperature. The pH of precursor mixture solution before hydrolysis process has been varied to study their influence on the resulting N-doped TiO2. The resulting material were characterized using X-Ray Diffraction (XRD), N2 Gas Sorption Analyzer (GSA), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), and UV Vis Spectrophotometer. The XRD analysis result showed that the pH and water content played an important role on the crystal formation of the N-doped TiO­2. The result showed that a high acidity condition resulted in a favored tendency of anatase crystalline phase, while lowering acidity leaded to the rutile formation. Porosity analysis showed the significant influence of pH in the synthesis process on the pore characteristic and pore size distribution of the resulting material. The photocatalytic activity was tested on the methylene blue degradation system comparing to pure TiO2 and commercial Degussa P25 and the result showed that the synthesized N-doped TiO2 provided better photocatalytic activities.
EFEKTIVITAS PROBLEM BASED LEARNING DAN PEMBELAJARAN 5 M TERHADAP PEMAHAMAN KONSEP KIMIA Ricardus Jundu; Anti Kolonial Prodjosantoso
Jurnal Pendidikan dan Kebudayaan Missio Vol. 10 No. 2 (2018): Jurnal Pendidikan dan Kebudayaan Missio
Publisher : Unika Santu Paulus Ruteng

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.87 KB) | DOI: 10.36928/jpkm.v10i2.169

Abstract

Efektivitas Penggunaan Problem Based Learning dan Pembelajaran 5 M Terhadap Pemahaman Konsep Kimia. Penelitian ini bertujuan untuk mempelajari perbedaan efektifitas model PBL dan pembelajaran 5 M pada materi asam – basa terhadap pemahaman konsep siswa kelas XI SMA Setia Bakti Ruteng. Penelitian ini merupakan penelitian eksperimen semu menggunakan desain nonequivalent control group design. Analisis yang digunakan yaitu ANAVA satu jalur. Hasil penelitian menunjukkan bahwa tidak ada perbedaan efektifitas yang signifikan antara pembelajaran model PBL dengan pembelajaran 5 M ditinjau dari pemahaman konsep siswa kelas XI SMA Setia Bakti Ruteng.
PROBLEM BASED LEARNING (PBL) MENGGUNAKAN PENDEKATAN SAINTIFIK TERHADAP KEMAMPUAN PEMECAHAN MASALAH KIMIA SISWA Ricardus Jundu; A. K. Prodjosantoso; Apolonia H. Ramda; Silfanus Jelatu
JOURNAL OF KOMODO SCIENCE EDUCATION Vol. 1 No. 01 (2018): Science Education in 21st century (NOVEMBER)
Publisher : Unika Santu Paulus Ruteng

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.693 KB)

Abstract

This study aims to investigate the learning effectiveness of the PBL model using a scientific approach in Indonesian current curriculum in the context of students’ problem-solving ability in chemistry, specifically in the problem of acid-base solution. This research is designed in a quasi-experiment using a nonequivalent control group design. There were 43 students divided in 2 classes used as the sample in this research. The experiment class 1 was taught by using the PBL learning model of scientific approach while the conventional learning that is usually used by chemistry teachers, is applied in experiment class 2. The finding of the research shows that the PBL learning model using a scientific approach in learning acid-base solutions is highly effective to promote students’ problem-solving.
Miskonsepsi materi larutan penyangga Nurhidayatullah Nurhidayatulah; Anti Kolonial Prodjosantoso
Jurnal Inovasi Pendidikan IPA Vol 4, No 1: April 2018
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (654.164 KB) | DOI: 10.21831/jipi.v4i1.10029

Abstract

Penelitian ini bertujuan untuk mengetahui miskonsepsi materi larutan penyangga, persentase miskonsepsi pada setiap indikator materi larutan penyangga, dan penyebab terjadinya miskonsepsi materi larutan penyangga pada siswa SMA Negeri 2 Mataram. Penelitian ini merupakan penelitian deskriptif kualitatif yang melibatkan 80 siswa kelas XI IPA 4 dan XI IPA 5 SMA Negeri 2 Mataram sebagai sampel dalam penelitian yang ditentukan secara purposive sampling. Instrumen yang digunakan untuk menganalisis miskonsepsi larutan penyangga yaitu instrumen multiple choice two tier diagnostic. Instrumen di validasi oleh expert judgment dan validasi empirik oleh 38 siswa kelas XII IPA 2 SMA Negeri 2 Mataram.. Hasil analisis miskonsepsi larutan penyangga menggunakan instrumen two-tier multiple choice diagnostic menunjukkan bahwa terjadi miskonsepi sebesar 47%, memahami konsep sebesar 37%, dan tidak memahami konsep sebesar 16%. Miskonsepsi terbanyak terjadi pada indikator konsep perhitungan pH larutan penyangga pada penambahan sedikit asam atau basa sejumLah 4 soal yaitu dengan rata-rata 64,08%. Miskonsepsi larutan penyangga terjadi karena guru kurang menekankan materi konsep, khususnya pada indikator larutan penyangga pada kehidupan sehari-hari, bahasa buku teks kimia yang terlalu sulit, dan siswa sendiri yang kurang fokus saat proses pembelajaran. Misconceptions on buffer solution AbstractThis study aims to determine the misconception on buffer solution, the percentage of misconceptions on each indicator, and the cause of the misconception of the student of SMA Negeri 2 Mataram.This research is a qualitative descriptive study involving 80 students of class XI of physics study (IPA) 4 and XI 5 of SMAN 2 Mataram as samples determined by purposive sampling. The instrument used to analyze the misconceptions of the buffer solution is two-tier instrument diagnostic multiple choice. The instrument is validated by expert judgment and empirical validation by 38 students of class XII physic study (IPA) 2 SMA Negeri 2 Mataram. The results of the data analysis showed that there is 47% misconceptions, 37% understand and as many as 16% do not understand concept. Misconceptions occurred in the calculation of the indicator concept pH buffer solution in the addition of a small amount of acid or base in an average of 64.08%. The misconception of the buffer solution occurred because the teachers did not emphasize the concept of matter, particularly on indicators of the buffer solution in everyday life, the language of chemistry textbooks that are too difficult, and the students themselves are less focused during the learning process.
Effectiveness of STEAM-based blended learning on students’ critical and creative thinking skills Agnesi Sekarsari Putri; Zuhdan Kun Prasetyo; Lusila Andriani Purwastuti; Anti Kolonial Prodjosantoso; Himawan Putranta
International Journal of Evaluation and Research in Education (IJERE) Vol 12, No 1: March 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijere.v12i1.22506

Abstract

The critical and creative thinking skills of Indonesian students are relatively low from countries in the Malay family such as Malaysia and Singapore. This research aims to improve students’ critical and creative thinking skills through the use of Science, Technology, Engineering, Art, Mathematics (STEAM) based blended learning. This research is a quasi-experimental study using a nonequivalent pretest-posttest control-group design. The sample consists of 180 junior high school students in Yogyakarta, Indonesia. The samples in this study are 90 experimental class students and 90 control class students selected by random sampling cluster techniques because the selected samples come from individual groups or clusters. The instrument in this study consists of six questions in the form of essay questions. Test questions are analyzed using the gain score test and Kruskal-Wallis with SPSS 22. The results show steam-based blended learning can improve critical and creative thinking skills on all indicators with medium to high categories. The improvement of students’ critical and creative thinking skills in experimental classes is higher than that of the control class. In addition, there are differences in learning outcomes between control classes and experimental classes. STEAM-based blended learning can be an alternative for teachers to solve the problem of low critical and creative thinking skills.
Instrumental Analysis of Student Perceptions of Chemistry Learning with the STEM Approach at the end of the Covid-19 Pandemic using Second Order Confirmatory Factor Analysis Fajar Naqsyahbandi; Anti Kolonial Prodjosantoso
Jurnal Penelitian Pendidikan IPA Vol 9 No 3 (2023): March
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i3.2186

Abstract

This study aims to prove the construct validity and reliability of students' perceptions of chemistry learning instruments using the STEM approach using Second Order Confirmatory Factor Analysis. The sample in this study was 455 public high school students spread across South Bengkulu district, Bengkulu Province. The instrument developed is a questionnaire instrument using a Likert scale which consists of four dimensions, namely the scientific dimension (DS), the mathematical dimension (DM), the engineering and technology dimension (DTT) and the STEM dimension (DST). The results of the study show that the four dimensions have good validity and are still acceptable because the loading factor value is above 0.40. In proving reliability using Cronbach's Alpha, a value of > 0.6 (0.855) was obtained so that it was declared reliable and in further analysis proving construct reliability using Composite Reliability (CR) showed that all dimensions of student perceptions had good construct reliability as well
SINTESIS DAN KARAKTERISASI TiO2 TERDADAH NITROGEN MELALUI METODE HIDROTERMAL DENGAN VARIASI TEMPERATUR DAN KALSINASI Purdiana Susilowati; A.K Prodjosantoso A.K Prodjosantoso
Jurnal Elemen Kimia Vol 6, No 1 (2017): Volume 6 No 1 Tahun 2017
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mensintesis nanopartikel N-TiO2melalui metode hidrotermal dengan variasi temperatur untuk mengetahuipengaruh temperatur hidrotermal diikuti dengan kalsinasi terhadap struktur,ukuran partikel, karakter elektronik dan porositas N-TiO2.Nanopartikel N-TiO2 disintesis dengan cara mencampurkan akuadesdengan HCl 36% dan diaduk selam 10 menit, kemudian ke dalam larutantersebut ditambahkan larutan dodesilamin sambil dilakukan pengadukanselama 30 menit hingga diperoleh larutan homogen. Setelah itu, ke dalamlarutan tersebut ditambahkan sedikit demi sedikit larutan TiCl4 sambildilakukan pengadukan selama 30 menit. Larutan tersebut kemudiandimasukkan ke dalam tablung teflondan dioven selama 12 jam padatemperatur 110°C, 120°C dan 150°C. Hasil dari pengovenan tersebutkemudian digerus dan dikalsinasi selama 3 jam pada temperatur 450°C.Karakterisasi sampel dilakukan menggunakan X-Ray Diffraction (XRD),FTIR, UV-Vis dan analisa isoterm adsorpsi-desorpsi menggunakan alatQuantachrome NovaWin2Hasil penelitian ini menunjukkan bahwa kenaikan temperaturhidrotermal yang diikuti dengan kalsinasi pada temperatur 450°Cmempengaruhi ukuran partikel N-TiO2 antara lain adanya peningkatanukuran partikel pada fase rutile dan adanya penurunan ukuran partikel padafase anatase. Selain itu, kenaikan temperatur hidrotermal juga menyebabkanperubahan rasio fase anatase dan rutile. Rasio fase rutile mengalamipenurunan pada sintesis dengan temperatur hidrotermal 120°C namunmengalami kenaikan pada sistesis dengan temperatur hidrotermal 150°C,sedangkan rasio fase anatase menurun seriring dengan naiknya temperaturhidrotermal. Kenaikan temperatur hidrotemal juga menyebabkan parameterkisi cenderung naik, energi celah pita cenderung menurun, ukuran porimenjadi lebih seragam, dan luas permukaan spesifik semakin besar.
PREPARASI DAN KARAKTERISASI KOBALT OKSIDA TEREMBAN TIMAH DIOKSIDA (CoOx@SnO2) SEBAGAI FOTOKATALIS Eti Febriani; A.K Prodjosantoso A.K Prodjosantoso
Jurnal Elemen Kimia Vol 5, No 4 (2016): Jurnal Mahasiswa Kimia FMIPA UNY
Publisher : Universitas Negeri Yogyakarta

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Abstract

Penelitian ini bertujuan untuk mempreparasi dan mempelajari karakter senyawa CoOx@SnO2 dengan variasi konsentrasi Co 1% dan 2,5%.Senyawa SnO2 dihasilkan dari reaksi antara SnCl4 dan NH4OH yang dilanjutkan dengan kalsinasi. Karakterisasi hasil dilakukan dengan FTIR, XRD, spektroskopi UV-Vis, dan SEM/EDX. Uji adsorpsi dilakukan pada keadaan gelap dengan mencampurkan katalis CoOx@SnO2 ke dalam larutan metil orange dengan variasi konsentrasi yang beragam.Analisis XRD menunjukkan ukuran kristal CoOx@SnO2 1% dan 2,5% adalah 40,0868 dan 34,7465 nm. Energi celah pita CoOx@SnO2 1% dan 2,5% adalah 1,79 eV dan 1,83 eV. Hasil SEM menunjukkan bahwa ukuran partikel CoOx@SnO2 berkisar antara 0,089 – 0,380 μm. Spektra EDX menunjukkan kandungan Co di dalam senyawa CoOx@SnO2 sebesar 0,1%. Uji adsorpsi pada keadaan gelap katalis CoOx@SnO2 mengikuti pola isoterm Langmuir. Kapasitas adsorpsi untuk masing-masing katalis CoOx@SnO2 dengan variasi konsentrasi Co 1% dan 2,5% berturut-turut 3,274394 dan 3,877472 (x10-6) mol/gram.
PENGARUH PENERAPAN PRE-LECTURE QUIZ(PLQ) PADA PEMBELAJARAN KIMIA TERHADAP MOTIVASI DAN PRESTASI BELAJAR SISWA Fitri Lestari; A.K Prodjosantoso A.K Prodjosantoso
Jurnal Elemen Kimia Vol 5, No 4 (2016): Jurnal Mahasiswa Kimia FMIPA UNY
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh penerapan Pre-Lecture Quiz(PLQ) pada pembelajaran kimia terhadap motivasi dan prestasi belajar siswa SMA N 1 Kalasan kelas X tahun ajaran 2015/2016 jika pengetahuan awal siswa dikendalikan secara statistik.Populasi penelitian adalah siswa kelas X SMA N 1 Kalasan tahun ajaran 2015/2016. Sampel penelitian ini berjumlah 53 siswa yang terbagi dalam dua kelas yaitu kelas eksperimen yang melaksanakan pembelajaran dengan penerapan PLQ (A1) dan kelas kontrol yang melaksanakan pembelajaran tanpa penerapan PLQ(A2). Pengujian hipotesis menggunakan uji-t sama subjek, uji-t beda subjek dan uji anakova.Berdasarkan hasil penelitian diperoleh bahwa (a) terdapat perbedaan motivasi belajar kimia siswa kelas eksperimen dan kelas kontrol dengan nilai signifikan p = 0,026. (b) terdapat perbedaan prestasi belajar kimia antara kelas kontrol dan kelas eksperimen dengan nilai Fhitung (4,259) Ftabel (4,034), p = 0,044.
Co-Authors Agus Santoso Anggra Prasetya Cahya Antuni Wiyarsi Apolonia H. Ramda AristantoWahyuWibowo, AristantoWahyuWibowo, Bambang Subali Cahyorini K. Cahyorini K. Cahyorini Kusumawardani Charis Dwi Ismail Dwi Dara Septi Putriani Endang Widjajanti Laksono FX Endang Widjayanti LFX Eti Febriani Fajar Naqsyahbandi Febrian Solikhin Fitri Lestari Giyas Idayu Himawan Putranta Isti Yunita Jumadi Jumadi Jundu, Ricardus Jundu, Ricardus Khairunnisa Khairunnisa Kristiyan Handoyo Sugiyarto Kun Sri Budiasih Lusila Andriani Purwastuti M. Pranjoto Utomo Mufida Awalia Putri Nurhidayatullah Nurhidayatullah Nuryuliana Nuryuliana Purdiana Susilowati Puspitasari Puspitasari Putri, Mufida Awalia Rahmawati, Vera Dwi Nur Ramda, Apolonia Hendrice Regina Tutik Padmaningrum Restu Utami, Restu Retno Puspitorini Ricardus Jundu Ricardus Jundu Rifki Nomizar Khairani Rini Wulandari Shinta Ambarwati Silfanus Jelatu Sukma Wahyu Wijayanti Tisia Miftakhul Triani Triani, Tisia Miftakhul Vera Dwi Nur Rahmawati Yunita, Isti Yuzzaini Dwi Kurniawati Zuhdan Kun Prasetyo