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All Journal Jurnal Periodic Jurusan Kimia UNP Biomedika Jurnal Progres Kimia Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Administrasi Pendidikan Indonesia Communications in Science and Technology Chemistry Indonesian Journal of Chemical Research JURNAL PENDIDIKAN TAMBUSAI Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Pelita Eksakta Indonesian Journal of Chemical Science and Technology Entalpi Pendidikan Kimia BIOCHEPHY: Journal of Science Education CHEDS: Journal of Chemistry, Education, and Science Automotive Experiences Journal of Educational Sciences MASALIQ: Jurnal Pendidikan dan Sains Entalpi Pendidikan Kimia Chimica Didactica Acta : Journal of Chemistry and Chemistry Education Journal of Global Research Education Jurnal Pendidikan MIPA
Desy Kurniawati
Jurusan Kimia FMIPA Universitas Negeri Padang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Characterization of Silica Nanoparticles from Pumice as an Aerogel Adsorbent Hidayah, Rahma; Kurniawati, Desy; Alizar, Alizar
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 6 No. 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.49368

Abstract

Pumice is often found around the banks of rivers, this stone is a type of igneous rock formed from volcanic eruptions. One of the compounds contained in pumice is silica. Therefore, the synthesis of silica nanoparticles from pumice using the sol gel method was used because it is simpler and more efficient in terms of cost and processing time. the initial step was by reacting pumice powder and NaOH at 70°C - 80°C then synthesized by adding 2M HCI to form a gel or white precipitate, soaking in ethanol, teos, hexane solutions was then synthesized to become an aerogel. Silica synthesis results into silica aerogels were characterized by FTIR and XRF. From FTIR silanol and siloxane functional groups were found, and the SiO2 composition increased to 93,299% after synthesis.
Characterization of Silica Nanoparticles from Pumice as an Aerogel Adsorbent Hidayah, Rahma; Kurniawati, Desy; Alizar, Alizar
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 7 No. 1 (2024): JANUARY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i1.56435

Abstract

Pumice is often found around the banks of rivers, this stone is a type of igneous rock formed from volcanic eruptions. One of the compounds contained in pumice is silica. Therefore, the synthesis of silica nanoparticles from pumice using the sol gel method was used because it is simpler and more efficient in terms of cost and processing time. the initial step was by reacting pumice powder and NaOH at 70°C - 80°C then synthesized by adding 2M HCI to form a gel or white precipitate, soaking in ethanol, teos, hexane solutions was then synthesized to become an aerogel. Silica synthesis results into silica aerogels were characterized by FTIR and XRF. From FTIR silanol and siloxane functional groups were found, and the SiO2 composition increased to 93,299% after synthesis.
Effect of Contact Time and Stirring Speed on Biosorption of Lead (II) Using Sugarcane Bagasse Pasaribu, Nur Rizky; Kurniawati, Desy
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 7 No. 1 (2024): JANUARY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i1.56443

Abstract

Lead is a hazardous and toxic metal if it reaches human organs in sufficient doses or if it is present in water. Pb2+ can build up in the brain, causing cancer, disorders of nerve cells, kidneys and mental health as well as problems with male reproduction and resulting in bone irregularities in children. As a result, it is vital to regulate the presence of this metal in water. Biosorption is a heavy metal removal technique that use biomass as an adsorbent. The biosorption method was conducted in this study employing sugarcane bagasse as an adsorbent and batch contacting. Variations in contact duration and stirring speed were tested in this study to determine the influence of contact time and stirring speed on the biosorption process. The study's findings revealed that a contact duration of 60 minutes and a stirring speed of 100 rpm were the best conditions in this research.
Integrated Green Chemistry Problem-Based Learning Module Development to Improve Science Process Skills Senior High School Students on Basic Chemicals Law Witri, Rahmi Eka; Hardeli; Kurniawati, Desy; Yerimadesi
Jurnal Penelitian Pendidikan IPA Vol 9 No 8 (2023): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i8.4380

Abstract

The implementation of the independent curriculum at the senior high school level can be an opportunity for educators to develop alternative teaching materials that according to the latest curriculum standards. One alternative teaching material that can be used is the module. This study aims to develop a basic chemical law module based on Problem Based Learning integrated with green chemistry that is valid, practical and effective. This type of research is educational development research (educational design research) or known as EDR. The test subjects for this study were three chemistry lecturers, two chemistry teachers, and tenth grade students. The results of the study obtained a construct validity of 0.90 and a content validity of 0.91. The results of practicality tests by teachers and students are included in the very practical group with respective values of 0.88 and 0.84. The results of the t test on student learning outcomes showed that t-count (2.87) is bigger than t-table (1.67), and the value of science process skills in the experimental class was higher than the control class. Therefore, it can be said that the module based on problem base learning integrated with green chemistry on basic chemical law material is valid, practicable, and effective. Therefore, it can be said that the modules made are reliable and useful for use in the learning process.
Development of Problem-Based Learning Student Worksheet Integrated with Ethnoscience on Acid-Base Material Marthin, Emmilya Febri; Hardeli; Oktavia, Budhi; Kurniawati, Desy
Jurnal Penelitian Pendidikan IPA Vol 10 No 7 (2024): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i7.7930

Abstract

This study aims to develop problem-based learning student worksheets integrated with ethnoscience on acid-base materials that are valid and practical. This research uses a development research method (Research and Development) with a 4-D model. The data of this study were collected through validity sheets completed by 4 validators, namely 2 chemistry lecturers and 2 chemistry teachers, and with a practicality questionnaire sheet completed by 2 chemistry teachers and by 35 students of SMAN 1 Batusangkar as respondents. Data were analyzed using quantitative descriptive method, using Aiken’s V. The result for content validity is 0.88 and construct validity is 0.90 with valid category. The result for teachers practicality is 0.95 and students practicality is 0.82 with practical category. Based on the results of the research that has been conducted, it can be concluded that the development of problem-based learning-based student worksheets integrated with ethnoscience on acid-base material is valid and practical.
Pengembangan E-Modul Sistem Koloid dengan Contextual Teaching and Learning (Ctl) Berorientasi Chemo-Entrepreneurship (Cep) untuk Meningkatkan Kemampuan Berpikir Kritis Peserta Didik Andrean, Maifil Dwi; Zainul, Rahadian; Nizar, Umar Kalmar; Kurniawati, Desy
Jurnal Penelitian Pendidikan IPA Vol 10 No 9 (2024): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i9.8546

Abstract

The high unemployment rate among high school graduates and the low critical thinking ability of high school students motivated the author to develop electronic teaching materials based on a contextual approach and oriented toward entrepreneurship. This study aims to determine the validity, practicality, and effectiveness of the e-Module on colloid system with Contextual Teaching and Learning (CTL) oriented toward Chemo-Entrepreneurship (CEP) to enhance students' critical thinking ability. The research method employed is Research and Development (R&D) using the Plomp model, which consists of the preliminary research phase, development or prototyping phase, and assessment phase. The research instruments used include validity questionnaires, practicality questionnaires and critical thinking ability test. The e-Module was validated by three lecturers from the Chemistry Department at UNP and two chemistry teachers from SMAN 6 Solok Selatan. Practicality testing was conducted with two chemistry teachers and 30 eleventh-grade students from SMAN 6 Solok Selatan. Data obtained from the validity and practicality tests were analyzed using Aiken’s V formula and practicality percentages. The validity test results showed a V value of 0.92, indicating a valid category. The analysis of the teacher practicality questionnaire showed an 86% score, categorized as very practical, while the student practicality questionnaire showed an 81% score, categorized as practical. The t-test yielded a sig (2-tailed) value of 0.026. Based on these results, it can be concluded that the developed e-Module is valid, practical, and effective in enhancing students' critical thinking skills.
Validity and Practicality of Reaction Rate Module Based on Problem Based Learning Integrated Socio-Scientific Issues for Phase F Firanti, Feyges Frilla; Andromeda; Alizar; Kurniawati, Desy
Jurnal Penelitian Pendidikan IPA Vol 11 No 3 (2025): March
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i3.10432

Abstract

design stages, this research only focuses on the development stage, namely the validity and practicality tests. The research instruments used were validation questionnaires and practicality questionnaires for teachers and students. The validity test was carried out by 5 expert teams and the practicality test was carried out on two chemistry teachers and 34 phase F students. The results of construct and content validity tests were obtained at 0.89 and 0.93 with valid categories. The results of the module's practicality test conducted by teachers and students amounted to 92.92% and 87.45% with a very practical category. The results showed that a valid and practical PBL-based reaction rate module integrated with SSI was produced for phase F students.
Enhancing Students’ Achievement in Chemical Equilibrium Through a Scientific Literacy-Integrated 7E Learning Cycle E-Module Ardi, Ahmad Maulana; Kurniawati, Desy; Hardeli; Zainul, Rahadian; Nizar, Umar Kalmar
Jurnal Penelitian Pendidikan IPA Vol 11 No 5 (2025): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i5.11211

Abstract

Scientific literacy is crucial in chemistry education, yet PISA results indicate that Indonesian students still struggle with abstract concepts like chemical equilibrium. To address this issue, this study developed a scientific literacy-integrated e-module based on the Learning Cycle 7E model to improve student learning outcomes. Using an educational design research approach with the Plomp model, the e-module’s validity, practicality, and effectiveness were evaluated. Validation by subject matter and media experts yielded high validity scores of 0.89 and 0.91, respectively. Practicality testing involving teachers and students resulted in high scores of 91.27% and 89.70%. Effectiveness analysis, measured using the N-Gain formula, showed a significant improvement in students' learning outcomes. These results indicate that the developed e-module is valid, practical, and effective in supporting the understanding of chemical equilibrium among senior high school students.
PENGEMBANGAN E-LKPD BERBASIS DISCOVERY LEARNING TERINTEGRASI ETNOSAINS PADA MATERI ASAM BASA Astuti; Kurniawati, Desy
Jurnal Penelitian Pendidikan IPA Vol 11 No 10 (2025): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i10.12475

Abstract

This study aims to develop an e-LKPD based on discovery learning integrated with ethnoscience on acid-base material. The background of this study is based on the problem of low student understanding of the acid-base concept, the lack of visual and interactive media, and the limited use of technology in chemistry learning. This research is a design research study using the development model by Plomp, which consists of three stages: preliminary research, development/prototyping, and assessment phase. The results of the study show that the developed learning media is valid with an Aiken’s V value of 0.94, after being validated by seven experts (four content validators and three media validators). The practicality test indicates that the media is highly practical, with a practicality level of 98.5%. Meanwhile, the effectiveness test shows that the media is effective, proven by the learning outcomes of students using the e-LKPD being significantly higher than those in the class that did not use the developed e-LKPD. Therefore, the e-LKPD based on discovery learning integrated with ethnoscience on acid-base material that was developed is feasible to be used as an innovative alternative in chemistry learning to improve student learning outcomes.
Improving the Skills of Posyandu Cadres in Processing Nipah Fruit into Nutrient-Rich Functional Foods to Prevent Stunting in Katapiang Village, Batang Anai District, Padang Pariaman Regency Iryani, Iryani; Iswendi, Iswendi; Kurniawati, Desy; Amelia, Fitri; Suryani, Okta; Parbuntari, Hesty; MAIDA, MARGARITA CLAUDYA; Rivaldo, Ifan
Pelita Eksakta Vol 8 No 2 (2025): Pelita Eksakta, Vol. 8, No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol8-iss2/302

Abstract

Stunting remains a major public health issue in Indonesia, including in Padang Pariaman Regency, where the prevalence reached 28.3% in 2021 and declined to 19.4% in 2023. Efforts to prevent stunting require a community-based approach that utilizes local resources, one of which is the nipa palm fruit (Nypa fruticans), known for its high nutritional content and potential as functional food. This Community Service Program (PKM) aimed to enhance the knowledge and skills of Posyandu cadres in Nagari Katapiang in processing nipa fruit into nutritious and economically valuable food products. The methods included nutrition education, dissemination of information on nipa fruit potential, and training on appropriate technology for processing nipa into food products such as jam, nuggets, and meatballs. Evaluation was carried out through pre- and post-activity questionnaires. The results showed a significant increase in cadres’ knowledge of nipa’s nutritional content (from 20% to 100%) and health benefits (from 30% to 100%). Perceptions of nipa’s role in stunting prevention also increased from 25% to 95%. Furthermore, practical skills in producing nipa jam improved, where all participants who had never tried before were able to produce processed products after the training. Thus, this PKM activity successfully enhanced the knowledge and practical skills of Posyandu cadres, while demonstrating the potential of nipa fruit as a local food innovation supporting stunting prevention efforts.
Co-Authors Addawiyah, Nadiyatul Afifi, Rayhanil Afrilia, Yoni Aini, Syamsi Ali Amran Alizar Alizar, Alizar Alkhaira, Nisa Ana, Aziza Putri Andini, Namira Tri Andrean, Maifil Dwi Andromeda Anjelia, Mariza Ardi, Ahmad Maulana Arifah Sri Wahyuni Astuti Barkah, Fitri Annisa Benti Etika, Sri Budhi Oktavia Darussalam, Rahni Darwin Rio Budi Syaka Della Rosalynna Stiadi Dwi Finna Syolendra DWI RAMADHANI Edi Nasra Elsa Yuniarti Elviana Clara Manalu, Volma Em Sutrisna Fadhilah Fadhilah Faradina, Rela Fariz Adzani, Rivaldo Fatmawati, Rani Fauzana Gazali Firanti, Feyges Frilla Fitri Amelia Fitri, Bali Yana Fitria Ningsih, Rahmadhani Frista, Nada Gama Yoga, Nugroho Hafifah, Haifa Hamid, Syafira Putri Haqqu, Annisa Hardeli Hardeli Hardeli Hardianti, Amirah Salsabila Harmaiyani, Risky Hary Sanjaya Hasyim, Rahmat Heditama, Muhammad Raffi Hidayah, Rahma Holidayani Husna, Miftahul Ideal, Flami Luthfianisa Ifan Rivaldo Ikhsany, Diva Indang Dewata Indasyach Moreno, Zavi Intan Lestari Iqbal, Anwar Iryani Iryani Istiqamah, Siti Sarah Iswendi iswendi Jayawarsa, A.A. Ketut Karmila, Aroma Kartika, Reka Khairurrazak, Khairurrazak Kiki Amelia, Kiki Laily Nurliana Latisma, Latisma Lestari, Kardina Mahmud Mahmud Maida, Margarita Claudya Mardhatillah Nadien, Rahmah Mardi Marlini, Rahmida Martha, Rahma Dyan Marthin, Emmilya Febri Mawardi Miftahul Khair Muhammad Rayhan Mulia, Melindra Mutia, Nuraini Cut Nadia Nadia Nandi, Mila Lusy Tri Nizar, Umar Kalmar Nofianti, Nora Nofrianto Nofrianto Novela, Riana Nur Fitri Nurazmi, Suci Nurhayati Nurhayati Nurrahma, Yashinta Oktaviana, Najwa Annisa Parbuntari, Hesty Pasaribu, Nur Rizky Patricia, Popi Permana, Agus Agung Pernadi, Niza Lian Puja, Puja Putra Mustafit, Alvian Putra, Ananda Putri Ana, Aziza Putri Rinjani, Mitna Sekar Putri, Anisa Dwi Putri, Molsa Vitaloka Putri, Raisya Pratama Raden Mohamad Herdian Bhakti Rafael, Muhammad Rahadian Zainul Rahayu Ningsih, Sri Rahmi, Maulidia Arsyta Rantika Putri, Dwi Rara Bahri, Rayhani Riga Rio Budi Syaka, Darwin Risnawaty Risnawaty Risty, Chika Mei Romy Dwipa Yamesa Away Ronald, Meissa Lifangrha Rosalinda, Gigih Devy Safitri, Nadila Sari, Trisna Kumala Sepriyeni Oktavia, Syntia Sherly Kasuma Warda Ningsih Sri Benti Etika Stiadi, Della Rosalyna Sukarno, Ragil Suprawati, Vina Suryani, Okta Syamsul Arifin Tarmizi, Fadhilah Ulianas, Alizar Veronita, Silvi Witri, Rahmi Eka Yeni, Isra Yerimadesi Yerimadesi Yerimadesi Yoga, Nugroho Gama Yohanes Gunawan, Yohanes Yola, Servi Farda Yuranda, Fitri Zakiya, Ratu