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All Journal Jurnal Pendidikan Matematika dan IPA Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Chemistry in Education Lantanida Journal Jurnal Pendidikan Kimia (JPKim) Indonesian Journal of Chemical Science and Technology CHEDS: Journal of Chemistry, Education, and Science Jurnal Ilmu Pendidikan Indonesia Journal of Learning Improvement and Lesson Study LAVOISIER: Chemistry Education Journal Jurnal Indonesia Sosial Sains Indonesian Journal of Advanced Research (IJAR) Jurnal Inovasi Pendidikan Sains dan Terapan Journal of The Indonesian Society of Integrated Chemistry LAVOISIER: Chemistry Education Journal Jurnal Akademika Kimia Jurnal Ilmiah Bongaya (JIB) Journal of Sustainable Community Practices
Nurfajriani, Nurfajriani
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Analysis of Teacher Needs for the Development of Higher Order Thinking Skill (HOTS) Based Class X High School Chemistry Material Assessment Instruments Saputra, Oddy Azis; Nurfajriani, Nurfajriani; Sudrajat, Ajat
Jurnal Pendidikan dan Pembelajaran Kimia Vol 13, No 1 (2024): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

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

Abstract

This research aims to describe teachers' needs for HOTS-based assessment instruments that can be used in evaluating student learning outcomes in class X SMA. Needs analysis is carried out based on the first stage of the ADDIE model, namely (Analyst). The methods used in this research are survey and interview methods. The participants in this research were 5 chemistry teachers from 5 schools in Medan City. Data collection was carried out using a questionnaire with qualitative data type. The research results were analyzed descriptively and obtained data that the assessment instruments often used by teachers were still at the C1 - C3 cognitive level with a percentage of 90%, while HOTS-based chemistry learning assessment instruments with C4 - C6 cognitive levels were still very rarely used. The obstacle is that the creation, use and development of instruments are relatively difficult, so teachers feel less interested in creating HOTS-based assessment instruments and lack ideas or references for what assessment instruments are good for evaluating chemistry learning. So it has an impact on the level of critical and creative thinking abilities of students.Keywords: instrument, assesment, HOTSDOI: 10.23960/jppk.v13.i1.2024.14
PENGARUH PERBEDAAN METODE MELT PROCESSING DAN SISTEM LARUT TERHADAP HASIL GRAFT KOPOLIMERISASI CYCLIC NATURAL RUBBER (CNR) DENGAN GLYCIDYL METHACRYLATE (GMA) Eddiyanto, Eddiyanto; Sipahutar, Rezwan Mulya; Nurfajriani, Nurfajriani; Pulungan, Ahmad Nasir; Herlinawtati, Herlinawati
Lantanida Journal Vol 12 No 2 (2024)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v12i2.26272

Abstract

Although natural rubber has many good qualities, its commercial uses are limited by its low chemical reactivity and low heat stability. A derivative with better stability, Cyclic Natural Rubber (CNR), has to be chemically modified to increase its usefulness and broaden its range of applications. Investigating the effects of two different methods, the melt processing and solution system on the FTIR spectra of Cyclic Natural Rubber (CNR) graft copolymerization with Glycidyl Methacrylate (GMA) was the aim of this work. Additionally, an evaluation of the effect of Dicumyl Peroxide (DCP) and Benzoyl Peroxide (BPO) initiators on grafting results was carried out. According to FTIR spectrum analysis, the carbonyl ester (C=O) peak at roughly 1721 cm⁻¹, indicating effective grafting, was more pronounced in the melt processing approach than in the solution procedure. This implied that melt processing resulted in higher grafting efficiency. The absorption bands in the C-H stretching region (2860-2921 cm⁻¹) and the C=C stretching area (1672 cm⁻¹) show that the underlying structure of CNR has not degraded. The carbonyl index values for each composition showed that BPO performed better than DCP in the melt treatment method, however DCP as an initiator in the solution system produced a higher grafting efficiency than BPO.
Effect of Chain Length on Fatty Alcohol Sulfation using SO3-DMF Sitinjak, Elvri Melliaty; Masmur, Indra; Tarigan, Dedi; Anggini, Cindy; Simbolon, Emma Juli Anamasta; Simatupang, Endang; Pane, Yulia Ratu; Simorangkir, Murniaty; Nurfajriani, Nurfajriani
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.v6i2.49376

Abstract

The fatty alcohols C8, C10, C16 and C18 were used as raw materials for the sulfation reaction using the SO3-DMF complex to study the ratio of carbon chains. The first step is to prepare the SO3-DMF complex, by reacting SO3 gas into DMF at a temperature of 0-4 0C with a reaction time of 3 hours, then sulfation is carried out at 100 0C for 5 hours on C8, C10, C16 and C18. Tests were carried out on the results of sulfation with an FT-IR Spectrophotometer. Surface tension, foam stability and yield calculations. From the sulfation results, the yield results were respectively 83%, 81%, 68% and 61% then the results from the surface tension analysis were 35.3, dyne/cm, 30.3 dyne/cm, 29.4 dyne/cm and 33.6 dyne/cm and foam stability analysis of 0.2 cm, 0.8 cm, 0.7 cm and 1 cm. Based on the surface tension reduction value, palmityl alcohol is the best raw material for making surfactants.
Synthesis of Sodium Myristyl Sulfate with Myristyl Alcohol Sulfation using SO3-DMF Sitinjak, Elvri Melliaty; Masmur, Indra; Tarigan, Dedi; Anggini, Cindy; Simbolon, Emma Juli Anamasta; Simatupang, Endang; Pane, Yulia Ratu; Simorangkir, Murniaty; Nurfajriani, Nurfajriani
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.v6i2.49378

Abstract

The sulfation reaction between myristyl alcohol and the SO3-DMF complex has been successfully carried out to produce sodium myristyl sulfate. Formation of the SO3-DMF complex by reacting DMF and SO3 gas obtained from the reaction of phosphorus pentaoxide and H2SO4. The variables studied were the time of formation of the complex, the time and temperature of sulfation and the concentration of NaOH at neutralization. The results of myristyl alcohol sulfation with SO3-DMF were tested by FTIR spectroscopic analysis, surface tension test, and foam stability test. The formation time of the SO3- DMF complex of 5 hours is the result of the highest surface tension reduction and the most optimal foam stability. The results of the foam stability test analysis showed the highest value at 80oC with a foam stability of 0.5 cm. The best result of sulfation neutralized with 40% NaOH solution was able to reduce the surface tension value and has foam stability up to 66% with a decrease in foam height of 0.3 cm
Pengembangan Media E-Learning Berbasis Weblog dengan Pendekatan Contextual Teaching and Learning (CTL) pada Materi Laju Reaksi Rumahorbo, Shinta; Nurfajriani, Nurfajriani
Jurnal Indonesia Sosial Sains Vol. 3 No. 04 (2022): Jurnal Indonesia Sosial Sains
Publisher : CV. Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jiss.v3i04.566

Abstract

This study aims to find out the analysis of media needs, look for e-learning media based on weblogs with a CTL approach on reaction rates developed based on BSNP and knowing students' responses to webblog-based e-learning media with a CTL approach on the reaction rate material. Analysis of media needs was carried out by interviewing the chemistry class teacher of SMAN 1 Sibolga. This study uses the method (R&D) with the ADDIE development model covering the stages (analysis, design, development, implementation and evaluation). The developed media product was validated by 3 expert validators consisting of 2 chemistry lecturers and 1 chemistry teacher. The average result of the validation of the weblog-based e-learning media with the CTL approach that has been developed by chemistry lecturers and teachers is 3.70 in the very feasible category and material validation is 3.71 in the very feasible category and does not need to be revised. The assessment of the percentage of student responses to the web-based e-learning media developed was 74.5% with high response criteria
Development of an E-Handout Based on Discovery Learning on The Reaction Rate for Class XI Students Faudia, Nurul; Sudrajat, Ajat; Nurfajriani, Nurfajriani
Jurnal Akademika Kimia Vol. 14 No. 3 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i3.pp144-150

Abstract

This study aims to determine the level of feasibility, practicality, and the students' readability response to e-handout-based discovery learning. This development research uses 4-D development models developed by S. Thiagarajan, Dorothy S. Semmel, and Melvin 1 Semmel. The 4-D development model has four stages: the Define stage, the Design stage, the Development stage, and the Disseminate stage, but this study is limited to 3-D: the Define stage, the Design stage, and the Development stage. The subjects in this study were 3 material experts and media experts, five chemistry subject teachers, and the readability response of MIPA 1 class XI students, with 33 people. Data collection instruments include an interview sheet, an e-handout assessment sheet by a material expert validator and a media expert, a practicality sheet by a teacher, and a student reading response sheet. Data analysis techniques use qualitative and quantitative data. Based on the results of the study, an analysis of the needs of students showed that students agreed that it was necessary to develop an e-handout based on discovery learning on the reaction rate material. Then, assessment by material expert validators of an 85% well-deserved e-handout, assessment by media expert validators of an 86% well-deserved e-handout, teacher practicability of an 88% well-deserved or very practical e-handout, and 87% of students' readability response to e-handouts is said to be very decent or very high.
Penyuluhan 5 Si Jari Merah: Generasi Remaja Putri Merdeka dari Kurang Darah (Anemia) dan Pembagian Tablet Fe: 5 Red Fingers Counseling: A Generation of Young Women Free from Anemia and Distribution of Iron Tablets Silwanah, Andi Sani; Nurfajriani, Nurfajriani; Nurfadilah, Nurfadilah; Putri, Nur Agustin Rahayu; Mariana, Mariana; Sabrina, Sabrina; Nursyamsi, Nursyamsi; Resel, Keysa; Syaifuddin, Syaifuddin
Journal of Sustainable Community Practices Vol. 2 No. 1 (2025): April
Publisher : CV. Global Health Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65280/jscp.v2i1.36

Abstract

Abstrak Anemia merupakan penyebab kecacatan tertinggi kedua di dunia. Hal ini disebabkan oleh karena anemia dapat menyebabkan berbagai macam komplikasi antara lain penurunan daya tahan tubuh, gangguan kognitif, pertumbuhan terhambat, aktivitas menurun, dan perubahan tingkah laku. Kegiatan Pengabdian Ini Bertujuan Untuk Memberikan Pengetahuan Kepada Remaja Putri Tentang Anemia Dan Pentingnya Mengkomsumsi Tablet Fe. Metode Yang Digunakan Adalah Metode Penyuluhan Berupa Pemberian Materi anemia & tablet fe, Pembagian Tablet Fe dan bubur kacang ijo. Jumlah Peserta Sebanyak 21 Orang Peserta Remaja Putri Siswi MTS Ma’arif Puro’ro. Tingkat Pengetahuan Remaja Putri Sebelum Dilakukan Penyuluhan Kategori Cukup Sebanyak 5 Orang (25%) Sedangkan Remaja Putri Yang Memiliki Pengetahuan Kategori Kurang Sebanyak 15 Orang (75%). Setelah Dilakukan Penyuluhan Tentang Anemia Pada Remaja Putri, Dilakukan Post Test Dan Didapatkan Hasil Pengetahuan Remaja Putri Kategori Cukup Sebanyak 17 Orang (85%) Dan Sebanyak 3 Orang (15%) Yang Memiliki Pengetahuan Kurang. Ada Peningkatan Pengetahuan Yang Didapatkan Oleh Remaja Putri Setelah Dilakukan Edukasi Dengan Metode Penyuluhan Melalui Program Penyuluhan “5 Si Jari Merah: Generasi Remaja Putri Merdeka Dari Kurang Darah (Anemia) Dan Pembagian Tablet Fe. Abstract Anaemia is the second leading cause of disability worldwide. This is because anaemia can cause various complications, including decreased immunity, cognitive impairment, stunted growth, decreased activity, and behavioural changes. This community service activity aims to provide adolescent girls with knowledge about anaemia and the importance of consuming iron tablets. The method used is an educational method in the form of providing information about anaemia and iron tablets, distributing iron tablets and green bean porridge. There were 21 participants, all of whom were female adolescents studying at MTS Ma'arif Puro'ro. Before the education session, 5 participants (25%) had sufficient knowledge about anaemia, while 15 participants (75%) had insufficient knowledge. After the counselling session on anaemia in adolescent girls, a post-test was conducted, and the results showed that 17 participants (85%) had sufficient knowledge and 3 participants (15%) had insufficient knowledge. There was an increase in knowledge among adolescent girls after education was provided using the counselling method through the “5 Red Fingers: A Generation of Adolescent Girls Free from Anaemia” counselling program and the distribution of iron tablets
Co-Authors Ahmad Nasir Pulungan Ajat Sudrajat Anggini, Cindy Asep Wahyu Nugraha Bajoka Nainggolan Bustam, Bustam Eddiyanto Eddiyanto Farhansyah, Muhammad Faudia, Nurul Gustiana, Rara Haloho, Theo Jan Fery Herlinawtati, Herlinawati Indra Masmur Izmalinda, Izmalinda Khairunisa, Dira Manurung, MS Mariana Mariana Murniaty Simorangkir Nainggolan4, Bajoka Napitupulu, Rahel Ronauli Kurniaasih Nurfadilah Nurfadilah Nursyamsi Nursyamsi Pakpahan, Debora Pane, Yulia Ratu Putri, Nur Agustin Rahayu Rahayu Rahayu Ramlan Silaban Resel, Keysa Retno, Tri Rumahorbo, Shinta Rumahorbo, Shinta Mardiana S Siswanto Sabrina Sabrina Saputra, Oddy Azis Sari, Leny Nopvila Silwanah, Andi Sani Simatupang, Endang Simatupang, Lisnawaty Simbolon, Emma Juli Anamasta Sipahutar, Rezwan Mulya Sitinjak, Elvri Melliaty Syaifuddin Syaifuddin Syamsu, Nur Tarigan, Dedi Yudha, Sandy