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All Journal International Journal of Evaluation and Research in Education (IJERE) Jurnal Periodic Jurusan Kimia UNP Geoplanning : Journal of Geomatics and Planning Jurnal Riset Kimia JOIV : International Journal on Informatics Visualization Jurnal Penelitian Pendidikan IPA (JPPIPA) Orbital: Jurnal Pendidikan Kimia Indonesian Journal of Chemistry Jurnal Serambi Engineering JURNAL PENDIDIKAN TAMBUSAI Eksakta : Berkala Ilmiah Bidang MIPA Pelita Eksakta Didaktik : Jurnal Ilmiah PGSD STKIP Subang PAKAR Pendidikan Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Edukimia Entalpi Pendidikan Kimia Narra J BIOCHEPHY: Journal of Science Education Automotive Experiences Jurnal Pijar MIPA Journal of Community Service Makara Journal of Science Edu Research : Jurnal Penelitian Pendidikan MASALIQ: Jurnal Pendidikan dan Sains Entalpi Pendidikan Kimia Jurnal Kimia dan Rekayasa Ranah Research : Journal of Multidisciplinary Research and Development Chimica Didactica Acta : Journal of Chemistry and Chemistry Education Jurnal Pendidikan MIPA Prosiding Seminar Nasional Ilmu Sosial dan Teknologi (SNISTEK) Jurnal Pendidikan Kimia, Fisika dan Biologi Genbinesia Journal of Biology
Rahadian Zainul
Department Of Chemistry, Faculty Of Mathematics And Natural Science (FMIPA), Universitas Negeri Padang, Padang, Indonesia
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Pengaruh Variasi Ukuran Ketebalan Material Terhadap Karakteristik Termoelektrik Sistem C/CuO Sari, Putri Manda; Putra, Ananda; Zainul, Rahadian; Sanjaya, Hary
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125603

Abstract

One of the factors that can affect the quality and characteristics of thermoelectric materials is the size of the material.. This study aims to determine how the effect of material size is varied in width and thickness. The material used is activated carbon obtained from previous research that has met the SNI No. 06-3720-1995 content test. The activated carbon is then composited with Copper (II) Oxide. Based on the tests that have been carried out, the best material obtained is the material with a thickness size variation of 0.5 cm. With a high electrical conductivity value of 0.9507 MΩ-.cm-, low thermal conductivity of 0.1805 J/s and has a high Seebeck coefficient of 0.020 mV/K. Thermoelectricity offers sustainable energy to maintain energy needs, namely by converting wasted heat energy into electrical energy that can overcome the current global warming problem.
Optimation of Fe3+ Ion Desorption Using Sulfonate Modified Silica Gel-GPTMS Elvina, Elvina; Oktavia, Budhi; Nasra, Edi; Zainul, Rahadian
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i5.7453

Abstract

Silica gel is one of the adsorbents widely used in adsorption, but silica gel has a low ability to absorb metals. Hence, modifications need to be made to improve it. Silica gel modified using sulfonate groups from monosodium salt compound of 4-amino-5-hydroxy-2,7-naphthalene disulfonic acid using GPTMS coupling compound for adsorption and desorption of Fe3+ ions by column method was carried out. The adsorption process of Fe3+ ions using silica gel-GPTMS-sulfonate has been carried out in previous studies and obtained an optimum state at pH 6 and a concentration of 20 ppm. After the adsorption process is carried out, the desorption process is continued with variations in the type of desorption eluent and concentration variations. The types of desorption agents are NaCl, CaCl2, HCl, and HNO3, with the optimum desorption agent being HNO3 with a release of 0.077517 mg of Fe3+ ions from 0.1587403 mg of Fe3+ ions absorbed and a desorption percentage of 48.83%. The concentration variations are 0.5 M, 1 M, 2.5 M, and 5 M, with an optimum concentration of 2.5 M HNO3 with a release of 0.098505 mg Fe3+ ions and a desorption percentage of 64.43%.
Designing an Interactive Virtual Laboratory Learning Experience for Acid-Base Indicators Putra, Abrar Suryadi; Zainul, Rahadian
Orbital: Jurnal Pendidikan Kimia Vol. 8 No. 2 (2024): Orbital: Jurnal Pendidikan Kimia
Publisher : Chemistry Education Department of Education and Teaching Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/ojpk.v8i2.24630

Abstract

Science education, especially chemistry, plays a vital role in the development of conceptual understanding and practical skills among students. In the modern digital era, the integration of technology into education is indispensable to meet the demands of modern curricula. Virtual laboratories provide a safe and efficient way of teaching chemical concepts without the hazards that come with physical laboratories. This research was conducted to design, validate, and determine the feasibility of interactive virtual laboratory learning media for acid-base indicators. This research used the ADDIE model: Analysis, Design, Development, Implementation, and Evaluation. There were 79 Phase F high school students, and seven expert validators involved in the research, comprising chemistry lecturers and teachers. The data collection used questionnaires and interviews, while the validation used Aiken's index. The results showed that the virtual laboratory achieved high validity scores across content, construct, and technical quality, ranging from 0.76 to 0.90. The results indicated that the interactive virtual lab significantly enhanced the students' visualization of abstract chemical concepts, thus improving their engagement and understanding. This illustrates the potential of integrating technology into chemistry education to create more effective and engaging learning experiences.
Development of growth mindset in higher education in support of the World-Class University Setiawan, Risky; Dewi, Radeni Sukma Indra; Zainul, Rahadian
International Journal of Evaluation and Research in Education (IJERE) Vol 13, No 6: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijere.v13i6.30145

Abstract

This study aims to develop a tool to measure the growth mindset of university lecturers, which is associated with performance and professionalism in institutions, especially at Universitas Negeri Yogyakarta (UNY) to go to a World-Class University (WCU). This research is a research and development (R&D) research with a quantitative approach measuring the quality of university growth mindset instruments. The measuring tool developed is a questionnaire using the confirmatory factor analysis (CFA) method. The results of each indicator are analyzed and integrated with structural equation modeling (SEM). The results of the growth mindset study of the academic community at UNY. The growth mindset instrument construct for the academic community is qualified to measure the ability of growth mindset from lecturers. The results show that the developed instruments show a valid and reliable construct. Advanced analysis by multiple regression method with path analysis shows that the academic level is the moderate variable with the most influence on the growth mindset path analysis model. Increasing the academic level will optimize the growth mindset of lecturers; performance will evolve.
DEVELOPMENT OF STUDENT WORKSHEETS ON THE PERIODIC SYSTEM OF ELEMENTS BASED ON CONTEXTUAL TEACHING AND LEARNING FOR PHASE-E SENIOR HIGH SCHOOL Risty, Chika Mei; Kurniawati, Desy; Hardeli, Hardeli; Zainul, Rahadian; Syolendra, Dwi Finna
Chimica Didactica Acta Vol 12, No 2: December 2024
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jcd.v12i2.42002

Abstract

This study aimed to produce teaching materials in student worksheets based on contextual teaching and learning and to determine the validity and practicality of the student worksheets developed. The research method used is educational design research (EDR), with the Plomp development model carried out until the validity and practicality test stages are achieved. This development research shows that the contextual teaching and learning-based student worksheets developed are valid and practical. This is supported by the validation results, which have an average value of 0.91 and are included in the very valid category. The practicality results obtained from the small group test of students get a percentage of 95%, and the percentage result from the teacher is 92%, which is included in the Highly practical category. These results indicate that the student worksheets developed are feasible to be applied to learning to help students' understanding of concepts on the material of the periodic system of elements and encourage students to become active, creative, and critical learners. The results of this study indicate that the student worksheets developed are suitable for use in the learning process on the material of the periodic system of elements in phase E Senior High School.
INOVASI PRODUK PISANG MENJADI BERBAGAI JENIS PRODUK DI NAGARI PANTI SELATAN KECAMATAN PANTI KABUPATEN PASAMAN Anni Faridah; Sari Mustika; Rahadian Zainul; Ezi Anggraini; Durain Parmanoan
Journal of Community Service Vol 6 No 2 (2024): JCS, December 2024
Publisher : Ikatan Dosen Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56670/jcs.v6i2.261

Abstract

Kecamatan Panti, Nagari Panti Selatan, memiliki produksi pisang terbesar di Kabupaten Pasaman. Jumlah produksi pisang di daerah ini pada saat panen raya cukup besar, sehingga terjadi kelebihan produksi. Produksi pisang lebih besar daripada permintaan. Kondisi ini menyebabkan produksi pisang berlebihan karena masyarakat hanya menganggap pisang sebagai pisang untuk dijual dan tidak dikonsumsi secara signifikan. Selain itu, harga pisang sangat berubah-ubah dan cenderung rendah. Kegiatan pengabdian ini mempunyai tujuan untuk meningkatkan pengetahuan dan keterampilan pedagang kecil di nagari Panti Selatan, Kecamatan Panti, Kabupaten Pasaman sebagai mitra dengan memanfaatkan potensi daerah yang ada tetapi belum termanfaatkan secara optimal yaitu pisang menjadi produk yang bervariasi, seperti dodol pisang, nugget pisang, keripik pisang, dan stik pisang.
Computational Calculation and Molecular Docking of Thymol and O-Benzoyl Thymol as Inhibitor TYK2 Enzyme Maahury, Mirella Fonda; Baharudin, Muhammad Daswar A.; Zainul, Rahadian; Khalid, Ahmad Khudzairi; Jakmola, Vikash; Rebezov, Maksim
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 03 (2023): 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/vol23-iss03/405

Abstract

Thymol is the active ingredient in plants from Thymus vulgaris (thymus). The calculations and molecular docking have been done computationally for the thymol and o-benzoyl thymol. This computational calculation aims to obtain a stable structure and electronic properties of thymol and o-benzoyl thymol. The computational analysis used DFT for geometry optimization in the gas phase using B3LYP functional and 3-211G(d) as the basis set. The optimized structure of thymol and o-benzoyl thymol is not planar. The functional benzoyl decreases the bond length, increases the bond angle, and turns the dihedral. The electronic properties, such as atomic charge and density of HOMO-LUMO, show the difference between the two molecules. The optimized structure of thymol and o-benzoyl thymol is used for molecular docking with the TYK2 enzyme (tyrosine kinase). In this research, thymol and o-benzoyl thymol can inhibit TYK2 enzyme with the bond affinity is about -5.909 kcal/mol and -7.456 kcal/mol, respectively, for thymol o-benzoyl thymol. The primary molecular interaction is hydrophobic.
Synthesis of Kaolinite Nanotubes as Heterogeneous Catalysts for Transesterification Reaction of Waste Cooking Oil into Biodiesel Muhammad Rizki; Fitri, Ernarisa; Syukri Arief; Rahadian Zainul; Syukri
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 25 No. 04 (2024): 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/vol25-iss04/545

Abstract

Kaolinite, a naturally abundant clay mineral, possesses a significant surface area and catalytic properties. To enhance its catalytic efficiency, modification into kaolinite nanotubes is necessary, as this transformation increases surface area and porosity. The synthesis of kaolinite nanotubes was achieved through a solvothermal method, incorporating multiple intercalation and rolling processes influenced by ultrasonic waves, subsequently utilizing these nanotubes as heterogeneous catalysts. The resulting kaolinite nanotube catalysts exhibited well-defined nanotube morphology and were applied in the transesterification of waste cooking oil, with variations in methanol-to-oil ratios. The optimal biodiesel yield achieved was 49.84%, obtained after a 3-hour reaction period using a 3% w catalyst at 60 °C, with a methanol-oil ratio of 3:1. This research highlights the potential of kaolinite nanotubes as effective catalysts in biodiesel production.
Integrative Geospatial Analysis of Agricultural Land Resilience Using NDVI-Based Remote Sensing and GIS: Spatio-Temporal Impacts of Urbanization in Sleman Regency (2017–2022) Pamungkas, Guntur Bagus; Firmansyah, Muhammad Reffi; Tamara, Anindya Putri; Zainul, Rahadian
JOIV : International Journal on Informatics Visualization Vol 9, No 5 (2025)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62527/joiv.9.5.2127

Abstract

This study delves into the dynamics of agricultural health in Sleman Regency, Yogyakarta Special Region Province, Indonesia, spanning the years 2017 to 2022. By integrating Geographic Information System (GIS) techniques with NDVI-based remote sensing using Landsat imagery from the USGS, our research aims to comprehend the spatio-temporal patterns and transformations in agricultural land health over the study period. The primary objectives encompass understanding these alterations and assessing how urbanization and land utilization impact the well-being of agricultural lands in Sleman Regency. The analytical framework incorporates geospatial processing using QGIS to classify and visualize vegetation health changes, enabling spatially explicit interpretation of land degradation trends. Throughout the 2017–2022 analysis period, a concerning and consistent decline in healthy agricultural lands was observed. By 2022, only 4581.56 hectares of agricultural land remained in a healthy state, constituting a mere 0.011% of the total region, while the expanse of unhealthy land surged from 1109.48 hectares in 2017 to 1160.8 hectares in 2022. This shift underscores a distressing deterioration in the health of agricultural plants due to diminished agricultural land. The geospatial analysis reveals a notable encroachment pattern from urban expansion zones into previously fertile areas, highlighting the urgency for integrated spatial planning. To counter this trend, proactive protection and effective regulation of designated agricultural zones by the Sleman Regency Government are imperative to ensure sustainable cultivation of essential food crops within the region and maintain the overall well-being of the agricultural landscape. The study contributes to advancing GIS-based land monitoring approaches and offers actionable insights for sustainable land use policy formulation in rapidly urbanizing regions. Strengthening policies for sustainable urban development in harmony with agricultural interests is pivotal to securing prosperous and balanced socio-economic growth.
Pengembangan E-LKPD Berbasis Problem Based Learning pada Materi Ikatan Kimia Kelas XI Fase F SMAN 2 Batang Anai Tafonao, Leni Anggraeni; Zainul, Rahadian
Entalpi Pendidikan Kimia Vol 6 No 1 (2025)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/epk.v6i1.505

Abstract

The advancement of digital technology in the era towards society 5.0 has an impact on education, one of which is the transformation of printed teaching materials into electronic forms, namely E-LKPD. The purpose of this study aims to determine the validity and practicality of the e-LKPD developed, using the Plomp model of Research and Development (R&D). The stages carried out in this research are preliminary research, prototyping phase, assessment phase. This research is limited to prototyping. Data collection instruments used validation questionnaires and one to one evaluation, practicality questionnaires. Data processing using Aiken's V formula. Based on the validity test results, the average score was 0.93 with a valid category. The results of the practicality test for teachers and students amounted to 94% and 95% with a very practical category.
Co-Authors -, Bahrizal Adi Sofyan Ansori, Muhammad Admin Alif Afria Yolanda Agil Aditya Dinata Agustina, Niken Ahmad Fauzi Ahmad Maulana Ardi Ahmed, Shafique Aini, Syamsi Alfian, Fariz R. Ali Amran Alif, Admin Alifiansyah, Mochamad RT. Alizar Alyaa Farrah Dibha Amanda, Adittya Amaq Fadholly Ananda Putra Andini, Namira Tri Andre Juliano, Muhammad Andromeda Andromeda Andromeda Anggraini, Dhea Anggriani Sirait, Nova Anni Faridah Ansori, Arif NM. Antonius, Yulanda Arif Nur Muhammad Ansori Ariusni Ariusni Ariusni Elida Arli Aditya Parikesit Artha, Dwirani Puspa Asnil Asnil Asral, Suci Sukma Taruna Atmaja, Peter Y. Aulia, Halimatus S. B, Syamsul Amar Baharudin, Muhammad Daswar A. Bahrizal - Bambang Sudarmanta Bonkalo, Tatyana Budhi Oktavia Budhi Oktavia Burkov, Pavel Butarbutar, Suryani Cika Dania Marca Deandra Savira Delsya Helvira Suci Derkho, Marina Deski Beri Desy Kurniawati Desy Kurniawati Devi Purnamasari Dhea Kharisma, Viol Dian, Farida Aryani Dinda Sahara Dings, Tim Godefridus Antonius Dony Novaliendry Dony Novaliendry Dori Yuvenda Durain Parmanoan Durry, Fara D. Dwi Finna Syolendra Edi Nasra Efran Ustia Rahmad Elfianah, Verah elida elida Elkhool, Tarek A. Ellizar ellizar Elvina Elvina Erdiwansyah Erdiwansyah Erwandri, Rianovriani Ethica, Stalis N. Ezi Anggraini Fadila Gusman Fajriah Azra Fauzan Yan Hawari Feriani, Feby Festiyed Fetty, Amelia JT. Firmansyah Khairul Kamal Firmansyah, Muhammad Reffi Fitrah Mey Harmi Siregar Fitrah Mey Harmi Siregar Fitri, Ernarisa Fredy Kurniawan Ghoury Kharisma Anjali Goh, Khang Wen Guntur Bagus Pamungkas Hardeli Hardeli Hardeli Hary Sanjaya Hayaza, Suhaila Herdiansyah, Mochammad A. Hermansyah Aziz Hery Purnobasuki Hidayati, Shil Hidayatul Husna ike sabaria Ike Yusrianti Illyas Md. Isa Indah Permata Sari Indah Permata Sari Indang Dewata Intan Anika Putri Irda Yunita Isa, Illyas Md Isabellinda Istiqamah, Siti Sarah Jakhmola, Vikash Jakmola, Vikash Jamaluddin, Indra P. Jamaludin Jamaludin Kadek Rachmawati Karlinda Karlinda Karlinda Karlinda Khairun Nisa Khairunnisa Khairunnisa Khalid, Ahmad Khudzairi Kharisma, Viol D. Kharisma, Viol Dhea Kovalchuk, Dmitriy F. Krismadinata Krismadinata Lubis, Amalia Putri Lufri Lufri Ma'firah, Marla Maahury, Mirella Fonda Maifil Dwi Andrean Maiti Faddila Maksim Rebezov Maksimiuk, Nikolai Mardi Mardi Maria Kiseleva Marla Ma'firah Meksim Rebezov Muhammad Andre Juliano Muhammad Haris Effendi Hasibuan Muhammad Hermawan Widyananda Muhammad Nizar Muhammad Rizki Muhammad Rusdi Muhardi, - Muji Setiyo Mulia, Melindra Murtadlo, Ahmad AA. Murtadlo, Ahmad Affan Ali Musa, Susan H. Nadezhda Kenijz Nafika Nurullita Naw, Sin W. Nizar, Umar Kalmar Novela, Riana Novera Elsi Mudia Oki Muraza Oktarina, Cindy Parikesit, Arli A. Pera Meilita Pernadi, Niza Lian Pratiwi, Intan A. Putra, Abrar Suryadi Putra, Ananda Putra, Justitia ERP. Putra, Randi Purnama Putri Fatimah Qonitah Fardiyah Radeni Sukma Indra Dewi Rahma yulis lubis Rahma Zila Rahmatika Putri, Sinta Rahmi, Maulidia Arsyta Ramli Ramli Rasyadan Taufiq Probojati Ratna Sari Raudhatul Hanifa Rayandra Asyhar Rebezov, Maksim Regina Tutik Padmaningrum Remon Lapisa Revi Gina Gunawan Riga Riga Oktry Silpa Rijas, Livia Putrima Riko Romas Prayuda Rilla Gina Gunawan Risky Setiawan Risty, Chika Mei Rizaldy, Rafli Rohadatul Nadya Maurani Roza Herlina Saklani, Taru Salsabila Tri Rahmi Sari Mustika Sari, Putri Manda Sari, Yollit Permata Scherbakov, Pavel Sepiashvili, Ekaterina Seprianto Setianingsih, Primanita NM. Shmeleva, Svetlana Siltiwi Mandar Sinta Rahmatika Sinta Rahmatika Putri Skunda Diliarosta Sofia Sri Rizki Putri Primandari Sri Ulfa Sentosa Sri Wahyu Wardani Sri Wahyuningsih Sri Whayu Wardani Suci Sukma Taruna Asral Sukma Sahadewa, Sukma Sunarto Sunarto Sunarto Sunarto Susilo, Raden JK. Suyanta Suyanta Svetlana Artyukhova Syafiqoh, Iffat Syaifuddin Yana Syamsi Aini Syifa Rahma Ayunda Syukri Syukri - Syukri Arief Tacharina, Martia Rani Tafonao, Leni Anggraeni Tamara, Anindya Putri Tarek Elkhooly Teguh Hari Sucipto, Teguh Hari Tri Haryati Trihanto Setiadi Trisna Kumala Sari Turista, Dora Dayu Rahma Ullah, Md. Emdad Umar Kalmar Nizar Urmatul Uska Akbar Veneliza, Adila Vika Erlina Vikash Jakhmola Vikash Jakhmola Viol Dhea Kharisma Visca Alisia Arianti Visca Alisia Arianti Yanni, Fitri Yeni, Isra Yohandri Yosephi, Valensa Yulia Matrosova Yulia Mona Liza Yuni Aulia Putri Djasli