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Desy Kurniawati
Universitas Negeri Padang
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Pengembangan E-Modul Sistem Koloid dengan Contextual Teaching and Learning (Ctl) Berorientasi Chemo-Entrepreneurship (Cep) untuk Meningkatkan Kemampuan Berpikir Kritis Peserta Didik Maifil Dwi Andrean; Rahadian Zainul; Umar Kalmar Nizar; Desy Kurniawati
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.
Pengembangan E-Modul Larutan Penyangga Berbasis Problem Based Learning Terintegrasi Etnokimia Untuk Meningkatkan Kemampuan Berpikir Kritis Peserta Didik Nadia; Desy Kurniawati; Alizar; Budhi Oktavia
Jurnal Penelitian Pendidikan IPA Vol 12 No 3 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i3.14653

Abstract

This study aims to produce an electronic module (E-module) of buffer solutions based on ethnochemistry-integrated problem-based learning to improve students' critical thinking skills and analyze the level of validity, practicality, and effectiveness of the E-module on students' critical thinking skills. This type of research is Research and Development (R&D) with a 4-D development model. The 4-D development model consists of 4 stages of development, namely define, design, develop and disseminate. The results of the construct and content validity tests were 0.88, respectively, in the valid category. The results of the teacher and student practicality tests were 88.33% and 84.93%, respectively, in the very practical category. The N-Gain value analysis in the experimental and control classes was 0.71 and 0.46, respectively, in the high and medium criteria. The t-test results showed that students' critical thinking skills at SMAN 1 Bungo who used the E-module of buffer solutions based on ethnochemistry-integrated Problem-Based Learning were significantly higher than the control class that did not use the E-module. Thus, it can be said that the E-module on buffer solution material is valid, practical, and effective in significantly improving students' critical thinking skills.
Development of a PBL-Based E-LKPD Assisted by the wizer.me Website on Buffer Solution Material for Phase F Senior High School Students Suci Ramadani; Desy Kurniawati
BIOCHEPHY: Journal of Science Education Vol. 6 No. 1 (2026)
Publisher : MO.RI Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52562/biochephy.v6i1.1917

Abstract

This study is a research and development (R&D) study aimed at producing an electronic student worksheet (E-LKPD) based on Problem-Based Learning (PBL) assisted by the Wizer.me website on the topic of buffer solutions. The development model employed was the 4-D model, comprising the define, design, develop, and disseminate stages; however, this study was limited to the develop stage. The research instruments included interview guidelines, validation sheets, teacher practicality questionnaires, and student response questionnaires. The research subjects consisted of three chemistry lecturers from FMIPA UNP, two chemistry teachers from SMA Pertiwi 1 Padang, and Phase F students of SMA Pertiwi 1 Padang in the 2025/2026 academic year. The data collected were primary data analysed through validity and practicality tests. The expert validity test yielded an average Aiken's V index of 0.91, categorised as valid. The practicality test results indicated mean scores of 96% from teachers and 90% from students, both categorised as very practical. Based on these findings, it can be concluded that the developed PBL-based E-LKPD assisted by Wizer.me is valid, highly practical, and feasible for use as a chemistry learning medium on buffer solution material.
Pengembangan Media Game Edukasi “Maze Chase” Berbantuan Google Site Dan Wordwall Pada Materi Struktur Atom Fase E SMA/MA Holidayani; Alizar; Desy Kurniawati; Riga
Journal of Global Research Education Vol. 3 No. 1 (2025)
Publisher : Akademi Akuntansi Indonesia Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62194/52cngm10

Abstract

Penelitian ini bertujuan untuk menentukan validitas dan praktikalitas sarana pembelajaran game edukasi "maze chase" yang dikembangkan dengan dukungan google site dan wordwall pada topik struktur atom fase E SMA/MA dengan menggunakan model plomp. Studi ini dilakukan sampai tahap validitas dan praktikalitas. Penelitian ini dilakukan di FMIPA UNP dan SMA N 1 Luhak Nan Duo. Tiga dosen kimia FMIPA UNP dan dua pengajar di SMA N 1 Luhak Nan Duo menjadi subjek uji validitas. SMAN 1 Luhak Nan Duo melakukan uji praktikalitas dengan dua guru kimia dan dua belas siswa kelas X fase E. Kuesioner validitas dan praktikalitas digunakan. Uji praktikalitas dan validitas diuji dengan presentase skor capaian praktikalitas produk. Validitas diuji dengan formula Aikens'V. Hasil penilaian penelitian menunjukkan bahwa nilai Aikens'V untuk aspek isi senilai 0,95, aspek kebahasaan senilai 0,90, aspek penyajian senilai 0,93, dan aspek grafik senilai 0,95, yang semuanya menunjukkan kategori valid. 2. Guru dan siswa masing-masing memiliki nilai praktisitas 99% dan 92%, masing-masing. Hasil penelitian menunjukkan bahwa metode pembelajaran game edukasi "maze chase", yang digunakan pada topik struktur atom fase E SMA/MA dengan dukungan situs web Google dan wordwall, sudah valid dan sangat praktis dan dapat diterapkan. Oleh karena itu, penelitian ini dapat dilanjutkan ke fase penelitian berikutnya untuk menguji efektivitasnya
PENGEMBANGAN E-LKPD BERBASIS PROBLEM BASED LEARNING PADA MATERI TATA NAMA SENYAWA KIMIA DAN PERSAMAAN REAKSI KIMIA BERBANTUAN LIVEWORKSHEET SMA Vina Suprawati; Desy Kurniawati; Fauzana Gazali; Bali Yana Fitri
BIOCHEPHY: Journal of Science Education Vol. 5 No. 2 (2025)
Publisher : MO.RI Publishing

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

Abstract

Penelitian ini mengembangkan E-LKPD berbasis Problem Based Learning pada materi tata nama senyawa kimia dan persamaan reaksi kimia berbantuan Liveworksheet SMA. Penelitian ini menggunakan metode Research and Development (R&D) dengan model pengembangan 4D (Define, Design, Develop, dan Disseminate), namun dibatasi hingga tahap Develop. Instrumen penelitian meliputi angket wawancara guru, angket peserta didik, angket validitas, dan angket praktikalitas. Proses validasi dilakukan oleh tiga dosen Kimia Fakultas Matetamika dan Ilmu Pengetahuan Alam (FMIPA) UNP dan dua guru Kimia SMA Pertiwi 1 Padang untuk menilai kelayakan isi, tampilan, serta kesesuaian E-LKPD dengan tujuan pembelajaran. Hasil validasi pada setiap Tujuan Pembelajaran Harian (TP Harian) menunjukkan rata-rata skor sebesar 0,92, yang termasuk dalam kategori valid. Sementara itu, hasil uji praktikalitas yang melibatkan dua guru kimia dan 30 peserta didik Fase E SMA Pertiwi 1 Padang memperoleh rata-rata nilai 92% dari guru dan 91% dari peserta didik, yang tergolong dalam kategori sangat praktis. Hasil tersebut menunjukkan bahwa E-LKPD yang dikembangkan mudah digunakan, menarik, serta mendukung pembelajaran yang aktif dan berpusat pada peserta didik. Dengan demikian, dapat disimpulkan bahwa E-LKPD berbasis Problem Based Learning berbantuan Liveworksheet pada materi tata nama senyawa kimia dan persamaan reaksi kimia telah memenuhi kriteria valid dan sangat praktis.
VALIDITAS DAN PRAKTIKALITAS APLIKASI MOBILE SEBAGAI MEDIA PEMBELAJARAN PADA MATERI SISTEM PERIODIK UNSUR FASE E SMA/MA Khairurrazak Khairurrazak; Desy Kurniawati; Yerimadesi Yerimadesi
BIOCHEPHY: Journal of Science Education Vol. 5 No. 2 (2025)
Publisher : MO.RI Publishing

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

Abstract

Penelitian ini bertujuan untuk mengembangkan aplikasi mobile sebagai media pembelajaran kimia pada materi sistem periodik unsur untuk siswa SMA fasa E yang memenuhi kriteria validitas dan praktikalitas. Penelitian ini menggunakan metode Research and Development (R&D) dengan model Four D (4D) yang meliputi tahap define, design, develop, dan disseminate. Pengumpulan data dilakukan melalui angket validitas dan praktikalitas, kemudian dianalisis menggunakan rumus Aiken's V dan persentase praktikalitas. Proses validasi melibatkan lima validator yang terdiri dari tiga dosen kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang dan dua guru kimia SMAN 1 Nan Sabaris. Uji praktikalitas dilakukan oleh dua guru kimia dan lima belas peserta didik SMAN 1 Nan Sabaris. Hasil penelitian menunjukkan bahwa media pembelajaran yang dikembangkan memiliki tingkat validitas yang tinggi, dengan nilai Aiken's V sebesar 0,976 untuk ahli materi dan 0,962 untuk ahli media. Sementara itu, hasil uji kepraktisan memperoleh skor 95% dari guru dan 94% dari peserta didik, yang termasuk dalam kategori sangat praktis. Dengan demikian, aplikasi mobile yang dikembangkan dinyatakan valid dan praktis untuk digunakan sebagai media pembelajaran kimia.
Modification Of High-Protein Healthy PMT (Supplementary Feeding) As An Effort To Prevent Stunting And Malnutrition In Nagari Kamang Hilia, Kamang Mudiak District, Agam Melindra Mulia; Elsa Yuniarti; Desy Kurniawati; Della Rosalyna Stiadi; Fauzana Gazali; Fitri Yuranda; Raisya Pratama Putri; Nadila Safitri
Pelita Eksakta Vol 8 No 1 (2025): Pelita Eksakta, Vol. 8, No. 1
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol8-iss01/282

Abstract

Stunting is a chronic malnutrition problem caused by inadequate nutritional intake over a long period of time, resulting in impaired optimal physical and cognitive development. The problem of stunting and malnutrition requires coordination between various parties to overcome it. In Agam Regency, especially Nagari Kamang Hilia, the stunting rate is still relatively high, with a prevalence of 24.6%, according to the latest Indonesian Nutrition Status Survey (SSGI). One of the factors influencing this is the high cost of nutritious food, which reduces the interest of mothers in serving healthy menus for the family. Therefore, education and training on nutritious food processing with alternative food sources is needed to increase public understanding. This program targets posyandu cadres and PKK mothers as the main targets, with the aim of providing knowledge about the importance of fulfilling nutrition to prevent stunting and malnutrition. The results of this activity are expected to increase awareness and interest of mothers in processing nutritious food that is attractive and liked by families, especially children.
Biosorption of Indigo Carmine onto Duck Egg White-Modified Longan Peel Biosorbent: Effect of Particle Size and Contact Time Fadli Waarsyat; Desy Kurniawati; Sri Benti Etika; Trisna Kumala Sari; Saddam Husein; Jeningsih; Septian Budiman
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss02/665

Abstract

The increasing demand in the textile industry ideally requires effective wastewater treatment systems to prevent environmental pollution. These pollutants are resistant to degradation and pose serious risks to aquatic ecosystems and human health. To address this issue, sustainable and low-cost treatment methods are urgently needed. Biosorption using agricultural waste has emerged as a promising alternative; however its performance is often limited by insufficient active binding sites. Therefore, surface modification using natural protein sources is proposed to enhance adsorption capacity and efficiency. This study aims to develop and evaluate longan peel modified with duck egg white (LP-DEW) as an eco-friendly biosorbent for indigo carmine removal. The effects of particle size and contact time were investigated, and adsorption kinetics were analyzed using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The results showed that LP-DEW exhibited a maximum adsorption capacity of 128.27 mg g-1 at an optimal particle size of 63 μm and equilibrium time of 90 min. The adsorption process followed the pseudo-second-order model, indicating chemisorption as the dominant mechanism. In conclusion, LP-DEW demonstrates high adsorption efficiency and favorable kinetics, highlighting its potential as a sustainable biosorbent for dye-contaminated wastewater treatment.
SKRINING FITOKIMIA EKSTRAK DAUN DAN RANTING GLODOKAN TIANG (Polyalthia longifolia L.) Yunita; Nadiaro Risky Nasution; Rozalia; Musfirah Handayani; Desy Kurniawati; Della Rosalynna Stiadi
Didaktik : Jurnal Ilmiah PGSD STKIP Subang Vol. 12 No. 3 (2026): Volume 12 No. 3, September 2026 Release
Publisher : STKIP Subang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36989/didaktik.v12i3.16624

Abstract

This study aimed to identify the secondary metabolite compounds present in leaf and twig extracts of glodokan tiang (Polyalthia longifolia L.) using phytochemical screening and Fourier Transform Infrared (FTIR) analysis. Dried, powdered samples were extracted by maceration with ethyl acetate and 96% ethanol. The extects were qualitatively screened for steroids, terpenoids, alkaloids, phenolics, flaavonoids, and saponins. FTIR analysis (4000-450 cm-1) was used to identify functional groups. Both leaf and twig extracts contained various secondary metabolites, with 96% ethanol extracts showing a broader range of compounds than ethyl acetate extracts. Ethanol leaf extract tested positive for steroids, terpenoids, alkaloids, flavonoids, and saponins. FTIR spectra confirmed the presence of O-H, C-H, C=O, and C-O functional groups, supporting the existence of bioactive secondary metabolites. These findings indicate that glodokan tiang leaves and twigs are promising natural sources of bioactive compounds, and that 96% ethanol is a more effective solvent for extracting secondary metabolites.
Implementation of Problem-Based Learning to Enhance Students’ Critical-Thinking Activities in Chemistry Learning: A Classroom Action Research at SMAN 1 Pancung Soal Anisa Rahmawati; Desy Kurniawati; Fauzana Gazali
SEARCH: Science Education Research Journal Vol. 5 No. 1 (2026): SEARCH: October 2026
Publisher : IAIN Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47945/search.v5i1.3281

Abstract

Critical thinking is a crucial skill in chemistry education as it supports students' abilities to analyze, evaluate, and solve problems logically, and it is commonly fostered through learning activities such as questioning, discussion, and collaborative problem-solving. Preliminary observations revealed that the majority of Grade XI (Phase F) students at SMAN 1 Pancung Soal demonstrated low levels of engagement in discussions, questioning, and the analysis of contextual chemistry problems. This situation highlights the need for a learning model capable of enhancing these critical-thinking-supporting activities. This study aimed to describe the implementation of the Problem-Based Learning (PBL) model and examine the change in students' learning activities that support critical thinking during chemistry instruction. The study employed a Classroom Action Research (CAR) design following the Kemmis and McTaggart model, conducted over three cycles with 36 Grade XI (Phase F) students at SMAN 1 Pancung Soal who were identified through classroom observation and teacher assessment as showing low engagement in these activities. Data were collected using teacher- and student-activity observation sheets validated by expert judges. The results showed a progressive increase in observed learning activities supporting critical thinking, from an average of 39.0% in the pre-cycle stage to 58.0% in Cycle I, 73.6% in Cycle II, and 87.4% in Cycle III (an increase of 48.4 percentage points), placing the students in the highly active category. Improvements were observed across all seven activity indicators, including attention, questioning, expressing opinions, discussion, collaboration, problem-solving enthusiasm, and task punctuality. These findings indicate that PBL implementation was associated with increased learning activities that support critical thinking in chemistry instruction; as this study did not directly measure critical-thinking skills or include a comparison group, whether these activities translate into improved critical-thinking skills should be examined through further research using validated critical-thinking instruments.
Co-Authors Afdina Afdina Ahmad Maulana Ardi Ali Amran Alizar Ananda Putra Anisa Rahmawati Annisa Nabila Rahma Aroma Karmila Astuti Azhma Ulya Bali Yana Fitri Berliana Salsabila Budhi Oktavia Delfitri Delfitri Della Rosalyna Stiadi Della Rosalynna Stiadi Deski Beri Deva Indriyani Dewi Rika Aryani Dwi Hartati Edi Nasra Elinda Fithriana Elsa Yuniarti Emmilya Febri Marthin Fadhilatu Zikra Fadilla Yuri Merti Fadli Waarsyat Fauzan Aulia Akbar Fauzana Gazali Fitri Yuranda Haifa Hafifah Hardeli Hardeli Hardeli Hary Sanjaya Hesty Parbuntari Holidayani Indang Dewata Jeningsih Khairurrazak Khairurrazak Latisma Latisma Maifil Dwi Andrean Mufi Nasda Mulia, Melindra Musfirah Handayani Nadia Nadiaro Risky Nasution Nadila Safitri Nesya Febi Utami Niza Lian Pernadi Nofrianto Nofrianto Nova Fitriani Nur Hafni Hasibuan Rahadian Zainul Rahmi Eka Witri Raisya Pratama Putri Ramadani, Suci Rela Faradina Riga Riga Oktry Silpa Riga Riga Romy Dwipa Yamesa Away Rozalia Saddam Husein Salmariza Sy. Septian Budiman Sri Benti Etika Sri Benti Etika Suryelita . Syamsi Aini Trisna Kumala Sari Trisna Kumala Sari Ulianas, Alizar Umar Kalmar Nizar Vina Suprawati Yani Puspita Yani Yeni, Isra Yerimadesi Yona Prestica Yunita