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Nurfajriani, Nurfajriani
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Analysis of Science Literacy of XI Class Students In Buffer Solution Materials Yudha, Sandy; Simorangkir, Murniaty; Nurfajriani, Nurfajriani
Journal of Learning Improvement and Lesson Study Vol 3 No 2 (2023): JLILS (December Edition)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jlils.v3i2.46

Abstract

The background of this research is that the world of education is currently intensively developing scientific literacy skills for students. This condition is the result of the rapid development of science and technology (IPTEK), so students must be able to act wisely and be able to adapt to science, environment, society, and technology. The purpose of this study was to determine the level of scientific literacy in nominal, functional, conceptual, and multidimensional aspects of class XI students on buffer solution material at State Senior High School (SMAN) 1 Binjai, Langkat Regency. This research method is a survey research, using a cross-sectional survey design. The sample in this study was taken from class XI IPA 1, totaling 30 people based on a purposive sampling technique. The research instrument used was a scientific literacy test in the form of essay questions, with indicators of scientific literacy referring to the theoretical framework. Based on the results of data analysis, it was found that the average value of students' scientific literacy abilities, nominal literacy indicators were 83.33%, functional indicators were 57.67%, conceptual indicators were 59.07%, and multidimensional indicators were 28.49%.
Analisis Kebutuhan Awal Penuntun Praktikum Kimia Berbasis Green Chemistry untuk Mencapai Keamanan di Dalam Laboratorium Yudha, Sandy; Nurfajriani, Nurfajriani
Jurnal Inovasi Pendidikan Sains dan Terapan (INTERN ) Vol 2 No 1 (2023)
Publisher : Jurusan Teknik Sipil, Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/intern.v2i1.1166

Abstract

The 2013 Curriculum System requires students to play an active role in the learning process at school and study independently. So it is necessary to have learning media that can help students understand chemistry learning. Chemistry is a natural science that is both a product and a concept so that learning can be done through practicum activities. Practicum activities require a device as a guide in scientific work called a practical guidebook. This study uses a qualitative descriptive approach, which describes descriptively the results of the analysis carried out. The stages are as follows: the interview stage was conducted with Chemistry subject teachers to obtain data in the form of the use of practicum instructions that have been used so far and hopes for improvement. The second stage of the analysis was carried out using a questionnaire given to students to see how the practicum teaching and learning process was doing at school so far. This research involved students of class XI IPA Al-Azhar Private High School Medan. Based on the results of the research and discussion that have been described, it is concluded that the chemistry practicum guide that has been used so far at Madrasah Aliyah Al Washliyah Kedaisianam has not met the criteria. In the implementation of chemistry practicum students have not used a special practicum module, but only used the modules available in the package book
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

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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
THE EFFECT OF STAD TYPE COOPERATIVE LEARNING MODEL ASSITED BY VIDEO MEDIA ON STUDENT LEARNING OUTCOMES ON REACTION RATE MATERIAL IN HIGH SCHOOL Napitupulu, Rahel Ronauli Kurniaasih; Silaban, Ramlan; Nurfajriani, Nurfajriani; Nainggolan4, Bajoka; Simatupang, Lisnawaty
Jurnal Ilmu Pendidikan Indonesia Vol 12 No 1 (2024): JURNAL ILMU PENDIDIKAN INDONESIA
Publisher : Program Magister Pendidikan IPA, Program Pascasarjana Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jipi.v12i1.3553

Abstract

: This study aims to determine the effect of the Stad Type Cooperative learning model assisted by video media on student learning outcomes on reaction rate material in high school.  This research was conducted with a quasi-experimental method of two group pretes-posttes design. The sampling technique used random sampling technique. The research sample consisted of two classes, namely XI-IPA1 and XI-IPA2 classes, each consisting of 31 students. Class XI-IPA1 was the experimental class taught using the stad type cooperative learning model. While class XI-IPA2 was the control class taught with conventional learning. The research instruments used were non-test and test. The test instrument was used to determine the knowledge of students in the cognitive domain, as many as 20 items with four choices that have been tested for feasibility. The non-test instrument used is a questionnaire to measure student learning independence.  The pretest and post-test data of student learning outcomes in the experimental class were 40.5 and 84.5 while the control class data were 40.7 and 67.5. The percentage increase in n-Gain of student learning outcomes in the experimental class was 75% with a high category and the control class was 47% respectively with a medium category. Meanwhile, the percentage increase in N-gain of student learning independence in the experimental and control classes was 71% and 51% in the high and medium categories. There is a positive correlation between student learning independence and student learning outcomes, namely 0.635 with a moderate category.
THE INFLUENCE OF USING ANDROID-BASED SAC MEDIA WITH THE STAD TYPE COOPERATIVE LEARNING MODEL ON STUDENTS LEARNING OUTCOMES AND INTEREST IN CHEMICAL BONDING MATERIAL Pakpahan, Debora; Silaban, Ramlan; Nurfajriani, Nurfajriani; Nainggolan, Bajoka; Simatupang, Lisnawaty
Jurnal Ilmu Pendidikan Indonesia Vol 12 No 2 (2024): JURNAL ILMU PENDIDIKAN INDONESIA
Publisher : Master of Science Education Program, Postgraduate Program of Cenderawasih University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jipi.v12i2.3697

Abstract

This research aims to determine the effect of using Android-based Smart App Creator media with the STAD type cooperative learning model on students' learning outcomes and interest in chemical bonding material. The research was carried out from September to December 2023 at SMA Negeri 1 Silima Pungga-Pungga. This research uses a test instrument in the form of multiplechoice questions with 20 questions and a non-test in the form of a learning interest questionnaire with 30 statements. The sampling technique used in this research is random sampling, namely random sampling. The research sample was students in classes X-1 and X-6, totaling 36 people in each class. Hypothesis I test uses the right-sided t-test with the research results obtained by the value tcount > ttable, namely 5,36 > 1,666. Hypothesis II test uses the right-sided t-test with the research results obtained tcount > ttable, namely 11,57 > 1,666. Hypothesis Test III uses a correlation formula with the research results obtained rcount > rtable, namely 0,547 > 0,339. Based on the research results, it can be concluded that there is a significant influence on students' learning outcomes and interest in learning using Android-based Smart App Creator media with the STAD type cooperative learning model on chemical bond material and there is a relationship between students' learning interest and student learning outcomes taught using the media. Android-based Smart App Creator with a STAD type cooperative learning model on chemical bonding material.
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
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.
Analysis of the Needs for the Development of Computational Chemistry-Based Learning Media on the Subject of Hydrocarbons Gustiana, Rara; Nugraha, Asep Wahyu; Nurfajriani, Nurfajriani
LAVOISIER: Chemistry Education Journal Vol 3, No 1 (2024): LAVOISIER: Chemistry Education Journal
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v3i1.11537

Abstract

AbstractThis study aims to analyze the needs before developing computational chemistry-based learning media on hydrocarbon materials. This research is classified as development research developed with the ADDIE model. It's just that the stage used in this study is only limited to the analysis stage. Data collection in research is carried out by literature study methods and field studies with research instruments in the form of questionnaires on learning media needs and interviews by teachers. The location of this study is SMA Negeri Modal Bangsa Arun. Based on the results of interviews with chemistry teachers, it was found that learning hydrocarbon material at the high school level requires more effort because students must understand molecular structure, chemical bonds, and atomic structure. This makes students less understanding of concepts microscopically and can also cause misconceptions. Then, the results of the needs analysis show that there are still limited learning media that support microscopic concepts, especially the shape of molecules in 3-D. Based on the results of this study, it can be concluded that it is necessary to develop computational chemistry-based learning media on hydrocarbon materials.
PENGARUH KUALITAS PELAYANAN TERHADAP KEPUASAN PELANGGAN GRAB-BIKE: Studi Kasus Pada Mahasiswa Stiem Bongaya Makassar Bustam, Bustam; Syamsu, Nur; Nurfajriani, Nurfajriani; Izmalinda, Izmalinda; Retno, Tri
Jurnal Ilmiah Bongaya Vol. 2 No. 1 (2017): Vol. 2 No.1 : April 2017 : Jurnal Ilmiah Bongaya
Publisher : P3M STIEM

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

Abstract

Penelitian Ini bertujuan untuk mengetahui pengaruh kualitas pelayanan terhadapkeluasan pelanggan Grab-Bike (Studi Kasus Pada Mahasiswa STIEM Bongaya Makassar).Pengumpulan data kuantitatif deskriptif yang menjabarkan data yang diperoleh denganmenggunakan analisis untuk melihat pengaruh kualitas pelayanan terhadap kepuasanpelanggan Grab-bike (studi pada Masiswa Stiem Bongaya Makassar). Populasi dalampenelitian ini adalah mahasiswa konsumen Grab di Stiem Bongaya Makassar angkatan 2014jurusan Manajeman dan Akuntansi yang berjumlah 1.251 orang. Sedangkan sampel yang diambil melalui teknik pendistribusian kuesioner adalah Accidental Sampling (SamplingKebetulan) yaitu metode pengambilan sampel dengan memilih siapa yang kebetulanada/dijumpai. Hasil kuesioner tersebut telah di uji menggunakan metode uji validitas,reliabilitas dan uji asumsi klasik. Hasil penelitian ini menunjukkan bahwa Berdasarkan hasiluji t Variabel kualitas pelayanan memiliki arah positif dan nilai t hitung. Hal ini menunjukkanbahwa nilai signifikasi lebih kecil dari taraf signifikasi dan nilai t hitung lebih besar dari nilai ttabel, maka hipotesis diterima. Artinya Kualitas pelayanan berpengaruh positif signifikanterhadap kepuasan pelanggan Grab-Bike
Co-Authors Ahmad Nasir Pulungan Ajat Sudrajat Anggini, Cindy Asep Wahyu Nugraha Bajoka Nainggolan Bustam, Bustam Eddiyanto Eddiyanto Gustiana, Rara Herlinawtati, Herlinawati Indra Masmur Izmalinda, Izmalinda Khairunisa, Dira Murniaty Simorangkir Nainggolan4, Bajoka Napitupulu, Rahel Ronauli Kurniaasih Pakpahan, Debora Pane, Yulia Ratu Ramlan Silaban Retno, Tri S Siswanto Saputra, Oddy Azis Simatupang, Endang Simatupang, Lisnawaty Simbolon, Emma Juli Anamasta Sipahutar, Rezwan Mulya Sitinjak, Elvri Melliaty Syamsu, Nur Tarigan, Dedi Yudha, Sandy