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All Journal JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Penelitian dan Evaluasi Pendidikan Jurnal Penelitian Saintek INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni JPS Unimus Jurnal Inovasi Pendidikan IPA Jurnal Tadris Kimiya Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Indonesian Journal of Chemistry and Environment Jurnal Sains dan Edukasi Sains TANJAK: Journal of Education and Teaching Indonesian Journal of Chemistry and Environment Journal of Educational Sciences Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia Journal of The Indonesian Society of Integrated Chemistry
Das Salirawati
Department Of Chemistry Education, Faculty Of Mathematics And Natural Sciences, Universitas Negeri Yogyakarta, Yogyakarta
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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The Effect of Co2+ in the Form of CoCl2 Compounds on α-Amylase Activity Kusumawati, Perwita Riski; Salirawati, Das
Indonesian Journal of Chemistry and Environment Vol 3, No 1 (2020): JUNE 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v3i1.40814

Abstract

This study aims to determine: (1) the optimum conditions for α-amylase enzyme activity with potato starch as a substrate including incubation time, pH, temperature, substrate concentration, and enzyme concentration, (2) the effect of Co2+ metal ions in the form of CoCl2 compounds on α-amylase enzyme activity with potato starch substrate at optimum conditions. The determination of α-amylase enzyme activity with potato starch substrate was carried out using the dinitrosalicylic acid (DNS) method. The determination of α-amylase enzyme activity with and without the addition of CoCl2 was carried out at the optimum conditions that have been obtained. The variation in the added concentration of CoCl2 were 0.01; 0.02; 0.03; 0.04; and 0.05 M. The data obtained in this study were enzyme activity in units of mg/mL/minute at 37° C. The data analysis used was descriptive qualitative by comparing the activity of the α-amylase enzyme with and without the addition of CoCl2 at optimum conditions. The results of the average α-amylase enzyme activity at optimum conditions (temperature 37° C, pH 7.2, incubation time 15 minutes, substrate concentration 20 mg/mL, and enzyme concentration 40 mg/mL), namely 0.00794 mg/mL at temperature 37° C. For the mean α-amylase enzyme activity with the addition of CoCl2 at a concentration of 0.01; 0.02; 0.03; 0.04; and 0.05 M, respectively 0.0038; 0.0013; 0.0012; 0.0011; and 0.00031 mg/mL per minute at 37° C. Based on these data it can be concluded that the tendency of the Co2+ metal ion is inhibitory and greatly affects the activity of the α-amylase enzyme.
EFFECT OF TIME FERMENTATION OF SOYBEAN TEMPE TO TRIPSIN ACTIVITY Retno Arianingrum; Eddy Sulistyowati; Das Salirawati
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8927.357 KB) | DOI: 10.21831/jps.v12i2.5458

Abstract

The aim of the research is to study  the effect of the duration of fermentation process toward the content of soluble protein in tempe from soybean, and the activity of trypsin enzym toward that protein.The content of soluble protein was analyzed by Lowry method using casein as solution standard, and the tripsin activity was determined by Anson method. The duration offermentation process were 0,24,48,72, 96, and 120 hours. The research indicated that the content ofsoluble protein in tempe duringfermentation process for 0, 24, 48, 72,96, and  120 hours were 0.172;  0.212; 0.217; 0.212; 0.197, and0.158% (wlw) respectively, and the activity of trypsine toward the that soluble protein were 1.35; 2.33; 2.73; 2.13; 1.17 and o. 78 unit. It was indicated that the duration of fermentation process  influenced thecontent of soluble protein and tripsin activity. The highest of trypsin activity was infermentation process for 48 hours.
Critical Thinking Ability of High School Students in Daily Life Acid-base Concept Das Salirawati; Erfan Priyambodo; Anggiyani R.E. Nugraheni; Rahmat Basuki
JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG Vol 9, No 1 (2021): JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG
Publisher : Pendidikan Kimia Unimus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jps.9.1.2021.1-13

Abstract

This study aimed to comprehend the quality of critical thinking questions and measure the critical thinking ability in the daily life acid-base topic of 2nd -students from six public high schools, six private high schools, and combination of them in Yogyakarta at the 2018/2019 academic year based on the answer patterns of students to the developed critical thinking questions. The method was an ex-post facto research designed with a one-sample design. The level of critical thinking ability was measured by 15 critical thinking question outlined from the seven critical thinking criteria referred to established commercial critical thinking test. The questions were theoretically validated by three reviewers (content, evaluation, and chemistry education experts). The results showed that the quality of critical thinking questions were excellent. The level of critical thinking skills in daily life acid-base topic of 2nd-grade Yogyakarta’s senior high schools at the academic year 2018/2019 of six public high schools, six private high schools, and combination both of them was 40.2% (moderate), 34.8% (deficient), 37.5% (deficient), respectively.
Identifikasi Problematika Evaluasi Pendidikan Karakter di Sekolah Das Salirawati
Jurnal Sains dan Edukasi Sains Vol. 4 No. 1 (2021): Jurnal Sains dan Edukasi Sains
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/juses.v4i1p17-27

Abstract

Pencanangan pendidikan karakter telah dimulai sejak 10 tahun lalu. Namun, hasil pelaksanaanya di sekolah belum diketahui secara pasti, sehingga diperlukan identifikasi mengenai problematika evaluasi pendidikan karakter di sekolah. Artikel ini bersifat deskriptif mengenai identifikasi bagaimana cara mengevaluasi keberhasilan pendidikan karakter di sekolah dengan tepat, sehingga nilai-nilai karakter tersebut secara nyata terinternalisasi dalam jiwa anak didik, tertampilkan dalam perilaku yang baik, dan akhirnya muncul sebagai habit (kebiasaan) yang membudaya. Beberapa faktor penyebab tidak berhasilnya implementasi pendidikan karakter sampai saat ini adalah (1) belum adanya model evaluasi pendidikan karakter sebagai pedoman operasional dalam melakukan evaluasi pendidikan karakter peserta didik secara tepat, efisien dan efektif, (2) pendidikan terlalu menekankan pada aspek intelektual sebagai ukuran keberhasilan, sehingga pembentukan karakter yang baik terabaikan, (3) tidak adanya penerapan pendidikan karakter secara menyeluruh, melainkan sekedar memenuhi kewajiban mengajar, tanpa mengetahui bagaimana seharusnya, (4) anak belum mendapatkan model yang dapat menjadi teladan, dan (5) derasnya informasi yang diterima anak tanpa penyaring. Beberapa langkah evaluasi pendidikan karakter yang diusulkan untuk mengatasi masalah utama evaluasi pendidikan karakter adalah (1) mendefinisikan atau memberi makna secara khusus pada karakter yang akan dicapai, (2) elaborasi terhadap substansi makna yang terkandung dalam karakter tersebut melalui suatu hierarki perilaku: moral knowing, moral feeling, dan moral action, (3) menyusun indikator hasil belajar yang harus dikuasai oleh anak sesuai tahap perkembangannya, (4) menjabarkan indikator karakter menjadi indikator penilaian dalam bentuk rubrik.
The Influence of Al3+ Metal Ion in AlCl3 Compound On α- Amylase Enzyme Activity Choirul Chasanah; Das Salirawati
Indonesian Journal of Chemistry and Environment Vol 3, No 2 (2020): DECEMBER 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.934 KB) | DOI: 10.21831/ijce.v3i2.43512

Abstract

The influence of  Al3+ metal ion in  AlCl3 towards α-amylase enzyme activity have been studied. The activity of the α-amylase enzyme on potato starch substrate was determined using the DNS method (3,5-dinitrosalicylic acid) at optimum conditions. The data analysis was conducted in a descriptive qualitative manner. The results obtained that α-amylase enzyme activity with potato starch substrate was optimum at  20 mg/mL with pH 7.2, incubation temperature 37˚C, incubation time 15 minutes, and enzyme concentration of 40 mg/mL with an average enzyme activity value of 0.0079 mg/mL/minute at 37˚C. However, after the addition of Al3+ metal ion, the average value of enzyme activity decreased. These means that empirically Al3+ metal ion has a tendency to be inhibitory to the α-amylase enzyme activity on potato starch substrates.
Development of Inquiry-Based Student Worksheets on Chemical Bonding Material Nur istiqomah; Das Salirawati
Jurnal Penelitian Pendidikan IPA Vol 9 No 4 (2023): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i4.3118

Abstract

This research is a type of development research that uses the Four-D development model to produce inquiry-based worksheets on chemical bonding material. This study aims to produce inquiry-based worksheets that are suitable for use in the chemistry learning process. Media quality assessment is based on due diligence by material experts and media experts. The practicality test assessment was carried out by three reviewers and two Peer reviewers, and the readability test was carried out by students. The results of the study were declared feasible with several inputs and suggestions provided by media experts and material experts. The results of the practicality test of inquiry-based worksheets by reviewers and peer reviewers showed a very good category with a total average score of 77.7 and 73.0, respectively. The results of the product readability test by students for all aspects, namely learning, visual display, and software engineering, obtained an average total score of 33.03 out of 9 indicators which were categorized as very good.
The Development of an Affective Assessment Instrument Based on Creativity and Critical Thinking on Reaction Rate Material Yessi Prihartina; Das Salirawati
Jurnal Tadris Kimiya Vol 8, No 1 (2023)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v8i1.25397

Abstract

This study aims to determine the characteristics of the assessment instrument, feasibility, and description of the affective aspects of students in the reaction rate material. The measure affective aspects are creativity and critical thinking attitudes. The research method is research and development (R&D) developed with a 4-D model. The research subject was taken from second-grade Senior High School with a random sampling technique. The initial product of the instrument was content validated by expert judgment, which was calculated using the Aiken formula and construct validity using Confirmatory Factor Analysis. The results showed that the instrument was declared feasible based on the content validity of 0.976 with a good category. The construct validity results stated that 18 fit items from 21 statement items. The description of the affective aspects of students in the reaction rate material from 213 students showed that the average student is in a good category.
Using Learning Managemant System in Fundamental of Analytical Chemsitry Course: Effect on Students’ Critical Thinking through The Authentic Assessment Metridewi Primastuti; Erfan Priyambodo; Das Salirawati
TANJAK Vol 4 No 2 (2023): Agustus
Publisher : Jurusan Tarbiyah dan Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35961/tanjak.v4i2.949

Abstract

Critical thinking is the main skill for connecting relationships between chemical science concepts in a coherent environment. Therefore, a learning and evaluation method is needed to help students master the meaning of chemistry to environmental phenomena. The Fundamental of Analytical Chemistry course invites students to study the technique of determining the concentration of a compound. This is relevant to improve their critical thinking skills. This study aims to analyze the effect of the implementation of Technology-based Authentic Assessment (TbAA) on students' critical thinking skills in Fundamental of Analytical Chemistry course. Designed as a pre-experimental, one group pretest-posttest study was applied. A total of 26 undergraduate Chemistry students were included as samples through purposive sampling. TbAA was held for 7 meetings, then critical thinking skills were assessed through essay instruments covering aspects of interpretation, analysis, evaluation, inference. The validity test was carried out theoretically by 2 learning chemists on 4 critical thinking questions that had been developed. After the data was obtained, descriptive statistics and the Wilcoxon test were carried out to answer the research objectives. Based on the results of the analysis, there is a significant difference in students' critical thinking skills after the application of TbAA.
Authentic Assessment in The Pandemic Period Das Salirawati
Journal of The Indonesian Society of Integrated Chemistry Vol. 13 No. 1 (2021): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v13i1.11716

Abstract

The pandemic period was resulted in a sudden change from an offline to an online learning system without any preparation. This condition requires educators to harmonize the assessment system carried out so that it is suitable and relevant to the current pandemic era. Educators should be able to find a new formula for conducting assessments that are easy, simple, but still represent the student competency. This article provides strategies for how to perform authentic assessments in online learning in the pandemic era. This research is a descriptive study that focuses on solving actual problems encountered by educators (teachers) when learning takes place online due to the pandemic. Several authentic assessments that can be performed are (1) giving simple quizzes frequently, (2) giving assignments at the end of online learning activities, as detecting students' understanding of the material presented, (3) making variations in the form of questions and assignments so that students don't get bored, excited, and interested in studying, and (4) deliberating for deadlines and increasing the number of test questions/exams.
Students’ Misconceptions on the Dynamic Equilibrium Utami, Dita Putri; Salirawati, Das
Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Vol 8, No 8: AUGUST 2023
Publisher : Graduate School of Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/jptpp.v8i8.12771

Abstract

This study aims to describe students' misconceptions in dynamic equilibrium. Descriptive analysis was employed. The sample was 164 students from three high schools with different categories. Data is collected by test and interview. The test is a Two-tier multiple-choice test with a reliability of 0.71. Test results show the misconception in each school is still relatively high. Interviews results show that students’ think the reactions involving substances in solid and liquid cannot reach equilibrium. They also have the perception that the equilibrium reaction only occurs if the coefficient of the substance on the left and the right are same.
Co-Authors - Jumadi Agung Wijaya Subiantoro Anggiyani R.E. Nugraheni Bambang Subali Bambang Susilo Choirul Chasanah Dewi, Safira Eka Eddy Sulistyowati Eli Rohaeti Erfan Priyambodo Haatainen, Maria Outi Hasanah, Hanissa Nur Kusuma Dewi, Fitriana Pramesthi Kusumawati, Perwita Riski Metridewi Primastuti Munawaroh Munawaroh Nur istiqomah Primastuti, Metridewi Pujianto Pujianto Rahmat Basuki Retno Arianingrum Rukmana, Hardianti Sari, Anggi Mei Indah Siti Marwati Sukisman Purtadi Suyanta Suyanta Syaputri, Fadilla Panca Tairas*, Nelson Utami, Dita Putri Yessi Prihartina Yulia, Zulfa