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Jurnal Zarah
Published by Universitas Maritim Raja Ali Haji
ISSN : 23547162     EISSN : 25492217     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Zarah menerbitkan artikel hasil penelitian, pengembangan, dan kajian literatur tentang berbagai topik dalam bidang Pendidikan Kimia dan Ilmu Kimia.
Arjuna Subject : -
Articles 274 Documents
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The Chemistry Interest Divide: Male Vs. Female Students at Penajam Paser Utara High School Aprilia Sandra Kartika; Mukhamad Nurhadi; Maasje Catherine Watulingas
Jurnal Zarah Vol. 14 No. 1 (2026): April, 2026
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v14i1.7949

Abstract

Learning interest is one of the factors that greatly influences students’ success in understanding the subject matter. In high school chemistry learning, learning interest plays an important role because chemistry requires conceptual understanding, analysis, and application in everyday life. However, in reality, students’ learning interest often differs between male and female students. Gender is assumed to be one of the factors influencing these differences, whether in terms of participation, or tendencies in the learning process.  This study aims to determine the level of learning interest of male and female students in chemistry subjects. This research employed a quantitative descriptive design with the population consisting of senior high school students in the PPU region, using the proportionate stratified random sampling technique. The sample was determined using the Slovin formula with a margin of error of 10%, resulting in a total of 113 students, consisting of 47 male students and 66 female students. Data were collected using a non-test technique in the form of a learning interest questionnaire. The final results showed that the percentage of learning interest among male students was 72%, indicating that most male students had a high level of learning interest in chemistry. Meanwhile, female students achieved a percentage of 82%, which indicates that almost all female students had a very high level of learning interest in chemistry.
Implementation of the Remap-CIRC Learning Model Toward High School Students’ Learning Outcomes in Acid–Base Topics Agusto Jeremia Giawa; Sukemi Sukemi; Agung Rahmadani; Indah Lestari
Jurnal Zarah Vol. 14 No. 1 (2026): April, 2026
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v14i1.8136

Abstract

Students’ difficulty in understanding abstract and complex acid-base concepts requires the implementation of appropriate learning strategies. This study aims to evaluate the effectiveness of the Reading Concept Map-Cooperative Integrated Reading and Composition (REMAP-CIRC) learning model in improving students’ learning outcomes on acid-base topics. This research employed a pre-experimental method using a one-group pretest–posttest design. The participants consisted of 33 eleventh-grade students (Class XI-4) enrolled in the science track at State Senior High School 17 Samarinda during the 2024/2025 academic year. Data were collected through pretest and posttest instruments, as well as student response questionnaires. The data were analyzed using the Wilcoxon test to determine significant differences between pretest and posttest scores. The results showed that the average student score increased from 28.18 (pretest) to 73.64 (posttest). The N-Gain value was 0.61, categorized as moderate, while the effect size was 3.14, indicating a very high effect. In addition, the student response questionnaire showed a positive response with an average percentage of 79.84% (good category). Based on these results, it can be concluded that the REMAP-CIRC learning model is effective in improving students’ learning outcomes on acid-base topics.
Identifying Students’ Misconceptions in Chemical Equilibrium Using a Five-Tier Multiple-Choice Diagnostic Test Putri Adita Wulandari; Muhammad Fikri; Abdullah Abdullah; Tiara Swastika Putri
Jurnal Zarah Vol. 14 No. 1 (2026): April, 2026
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v14i1.8138

Abstract

This study aims to identify the profile of students' misconceptions on chemical equilibrium and to determine the sources of these misconceptions. This study used a descriptive method with quantitative and qualitative approaches and was conducted at SMA Negeri 7 Pekanbaru. The research subjects involved 187 11th-grade students who had studied chemical equilibrium. Data collection was conducted using a five-level diagnostic test instrument consisting of 15 questions and structured interviews. The results showed that the average percentage of students experiencing misconceptions was relatively low, at 20.93%. Analysis of the sources of misconceptions showed that the main cause of misconceptions came from students' personal thoughts, with a percentage of 24.15%. Other contributing sources included friends (20.66%), teachers (18.78%), the internet (18.35%), and books (18.06%). These findings indicate that students' misconceptions are more influenced by independent constructions of understanding that do not align with scientific concepts than other external factors.
Heavy Metal Bioaccumulation in Seagrass and Sargassum Across Indonesian Coastal Waters: Ecological Risks and Implications for Sustainable Coastal Management: A Systematic Review Nur Cholis; Gemala Madumetha; Kusuma Wijaya; Lily Viruly; Nancy Willian
Jurnal Zarah Vol. 14 No. 1 (2026): April, 2026
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v14i1.8216

Abstract

Heavy metal contamination poses a significant threat to Indonesian coastal ecosystems, particularly seagrass meadows and brown seaweeds such as Sargassum, which function as primary producers and environmental bioindicators. This study systematically reviews heavy metal accumulation in seagrass and Sargassum in Indonesian waters and examines its ecological and management implications. A systematic literature review was conducted following the PRISMA 2020 framework, covering studies published between 2016 and 2025 from Scopus, ScienceDirect, Web of Science, Google Scholar, and Garuda. Articles were included if they reported empirical data on heavy metal contamination in seagrass or Sargassum in Indonesia. After screening and quality assessment, 20 studies were selected for thematic synthesis. The results show that lead (Pb) and cadmium (Cd) were the most frequently reported metals exceeding quality standards, identified in 14 of 20 studies. Mercury (Hg) was detected at several sites, while nickel (Ni) and iron (Fe) were mainly associated with mining areas. Higher accumulation was observed in seagrass leaves and Sargassum thalli, particularly in areas influenced by ports, industry, tourism, settlements, and mining. These findings indicate potential ecological risks, including reduced primary productivity and trophic transfer. Overall, seagrass and Sargassum demonstrate strong potential as biomonitors of heavy metal contamination in Indonesian coastal waters.
Perbedaan Hasil Belajar Kimia Dengan Menggunakan Model Pembelajaran Kooperatif Tipe Team Quiz Dan Model Pembelajaran Kooperatif Tipe Teams Games Tournament (Tgt) Pada Pokok Bahasan Koloid Siswa Kelas X Teknik Otomotif Smk Negeri 6 Samarinda Nurfitri, Irma; Lestari, Sri; Amir M., Prof. Dr. Muh
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.10

Abstract

Telah dilakukan penelitian tentang perbedaan hasil belajar kimia dengan menggunakan model pembelajaran kooperatif tipe Team Quiz dan model pembelajaran kooperatif tipe Teams Games Tournament (TGT) pada pokok bahasan koloid siswa kelas X Teknik Otomoif SMK Negeri 6 Samarinda. Penelitian ini bertujuan untuk mengetahui perbedaan hasil belajar kimia dengan menggunakan model pembelajaran kooperatif tipe Team Quiz dan model pembelajaran kooperatif tipe Teams Games Tournament (TGT) pada pokok bahasan koloid siswa kelas X Teknik Otomoif SMK Negeri 6 Samarinda. Populasi pada penelitian ini adalah seluruh siswa kelas X Teknik Otomotif SMK Negeri 6 Samarinda. Sampel penelitian adalah siswa kelas X Teknik Otomotif 2 dan X Teknik Otomotif 3. Kelas X Teknik Otomotif 2 merupakan kelas yang menggunakan model pembelajaran kooperatif tipe Team Quiz dan kelas X Teknik Otomotif 3 merupakan kelas yang menggunakan model pembelajaran kooperatif Teams Games Tournament (TGT). Pengumpulan data dilakukan dengan dua teknik yaitu teknik tes dan teknik non tes, adapun teknik non tes terdiri atas teknik dokumentasi dan observasi. Data penelitian dianalisis secara statistik uji t, dimana diperoleh thitung = -2,20 dan ttabel = -1,68 . Karena thitung ? -ttabel, pada taraf signifikan 5%, maka Ha diterima, yang berarti terdapat perbedaan hasil belajar siswa antara penggunaan model pembelajaran kooperatif tipe Team Quiz dan Teams Games Tournament (TGT).
Impact Of Emotional Intelligence And Parenting Style (Democratic) On The Performance Of Bilingual Chemistry Learning Khoirunnisa, Fitriah; Nordin, Prof. Madya Aziz Bin
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.11

Abstract

The purpose of this study was to examine the relationship between students’ emotional intelligence and students’ democratic parenting style on the bilingual learning achievement of chemistry. This study was conducted on 159 students in the second class of International Pioneering School (RSBI), namely Senior High School 1 and 10, Samarinda, East Kalimantan, selected randomly. Questionnaires given to the students were related to students’ demographics, emotional intelligence and pattern of parental upbringing of students. The data were analyzed by using the Statistics Package for the Social Sciences (SPSS Version 17.0) to get the value of the Pearson’s Correlation. The analysis showed that there was a positive relationship between the students’ democratic parenting style with the students’ emotional intelligence in learning of bilingual chemistry subject (r = 0.289); there was a positive relationship between the learning achievement of bilingual chemistry with democratic parenting style (r = 0.106); there was positive relationship between students’ emotional intelligence with the learning achievement of bilingual chemistry (r = 0.112). Therefore, this study is expected to be the basis for teachers to develop effective learning process by building on students' emotional intelligence elements. In addition, parents can also apply a democratic parenting style to students at home. So that the merger of these two elements can enhance the results of students’ bilingual in chemistry subject.
Peningkatan Hasil Belajar Kimia Melalui Metode Pembelajaran Aktif Tipe The Learning Cell Pada Pokok Bahasan Koloid (Penelitian Tindakan Kelas Pada Siswa Kelas XI IPA SMAN 16 Samarinda) Widarti, Anis
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.12

Abstract

Penggunaan Metode Pembelajaran Aktif Tipe The Learning Cell untuk Meningkatkan Hasil Belajar Siswa Pada Pokok Bahasan Koloid (Penelitian Tindakan Kelas pada Siswa Kelas XI IPA SMAN 16 Samarinda). Penelitian ini bertujuan untuk meningkatkan hasil belajar Kimia melalui Metode Pembelajaran Aktif Tipe The Learning Cell pada Pokok bahasan Koloid Kelas XI IPA di SMAN 16 Samarinda. Jenis penelitian ini bersifat deskriptif yang berarti memaparkan data yang diperoleh melalui lembar observasi setiap pertemuan dan Post Test di setiap akhir siklus. Setiap siklus terdapat 4 tahap yaitu, perencanaan, pelaksanaan tindakan, observasi dan refleksi. Data aktivitas siswa dan guru diperoleh dengan metode observasi. Hasil belajar siswa diperoleh dari nilai siswa pada saat menjelaskan kembali materi yang disampaikan oleh guru dan nilai Post Test di setiap siklusnya. Hasil penelitian menunjukkan bahwa hasil belajar kimia siswa melalui metode pembelajaran aktif tipe The Learning Cell dapat meningkat. Peningkatan hasil belajar siswa dilihat berdasarkan jumlah siswa yang tuntas setiap siklusnya. Standar ketuntasan yang digunakan adalah 70 % dengan nilai KKM 70. Siklus pertama, jumlah siswa tuntas adalah 20 siswa atau 48,78%, dengan nilai rata-rata 66,39 ; sedangkan siklus kedua jumlah siswa yang tuntas adalah 34 siswa atau 87,80% dengan nilai rata-rata 75, 51 dan pada siklus ketiga jumlah siswa yang tuntas adalah 40 atau 97, 56% dengan nilai rata-rata 78, 48.
Development Of Ionic Liquid As Catalyst For Transesterification Reaction Alimuddin, Jamila Binti; Yarmo, Prof.Dr. Mohd Ambar
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.13

Abstract

Ionic liquid had a various uses and among them is as catalyst in a reaction. This research was carried out to synthesis and developed the choline chloride based ionic liquid to investigate their ability as a catalyst in transesterification reaction. The ionic liquid synthesized was choline chloride.2ZnCl2 and choline.2urea based system. Both of the ionic liquid synthesize were characterized by using Infra-red spectroscopy (FTIR) and Nuclear Magnetic Resonance spectroscopy (1H NMR & 13C NMR). Characterization result confirmed the functional group and the structure of the ionic liquids was as expected. Both ionic liquid were applied as a catalyst for the transesterification reaction and the resulting product was analyzed by GC-FID and GCxGC-MS (ToF). The transesterification reaction of palm olein and buthanol with the presence of choline chloride.2ZnCl2 gives 25.7% yields while with the use of choline chloride.2urea gives 25.0% yields. The results show that the acidity of choline chloride.2ZnCl2 and the basic properties of the choline chloride.2urea were not really suitable to be used as catalyst in the transesterification reaction.
Production Of Biolubricant Based On Jatropha Curcas Oil And Linear Alcohol Abstract Adriani, Nina; Salimon, Prof.Dr. Jumat
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.15

Abstract

The use of oils and fats for lubrication purposes has been practiced for many years. This is starting that realized since the mineral oil in a limited number. In this research, the production of biolubricant based plant oil is Jatropha Curcas oil and linear alcohol. Oil produced from the fruits is 44.30%. However, oxidative stability and low pour point are problem for biolubricant. The method used to overcome this problem is epoxidation process and ring opening. Epoxidation process successfully carried out by testing the oxyrane value and also FTIR analysis, where the peak of alkenes is 3007 cm-1. Epoxy peak appeared at 843 and 824 cm-1, which is testament to the success of epoxy ring is formed. Ring opening proved successful with FTIR analysis of the appearance of hydroxyl groups at the peak of 3444 cm-1, the peak of ether in 1097 cm-1, and the loss of epoxy peak. Bioubricant which is produced in the form of alcohol ether is to produce five types of biolubricant, which are decanol ether, dodecanol ether, tetradecanol ether, hexadecanol ether and octadecanol ether. 1H dan 13C NMR analysis is also succeeded in proving the presence of key functional groups for the fifth type of biolubricants. In terms of viscosity and flash point, lubricant successful enhanced oil-based plants, but not succeded to reduce the pour point.
Preparation Of Natural Rubber/High Density Polyethylene Composite Reinforced Rice Husk Treated With Liquid Epoxidized Natural Rubber (LENR) Syafri, Rahmadini; Abdullah, Prof Dr. Ibrahim; Ahmad, Prof Madya Dr. Ishak
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.16

Abstract

Thermoplastic natural rubber (TPNR) composites with rice husk (RH) as filler were prepared via melt blending using an internal mixer Brabender Plasticorder. TPNR matrix was prepared from natural rubber (NR) and high density polyethylene (HDPE) with a composition ratio of 60:40. The optimum processing parameters for NR/HDPE matrix was obtained at 135 oC, at mixing rate of 50 rpm and blending time of 12 minutes, while the parameters for the NR/HDPE/RH composite was at 135 oC mixing rate of 45 rpm and blending time of 12 minute. Addition of rice husk into the NR/HDPE matrix was aimed to reinforce the composites with the filler. The high silica content of rice husk has made rice husk to be used as potential reinforcement filler for composites. However, the application of rice husk as filler is limited due to the hydrophilic nature of rice husk surface causing incompatibility and weak interfacial adhesion between rice husk and the hydrophobic polymer matrix. Hence, the cellulose surface of rice husk has to be modified. The rice husk was treated with sodium hydroxide (NaOH) as pre-treatment and later coated with liquid epoxidized natural rubber (LENR). Several concentrations of NaOH solution were used for alkali treatment of untreated rice husk (RHi) and the most effective was at 5% NaOH in aqueous solution (RHiNa). LENR coating was also carried out at several concentrations from 5% to 20% LENR in toluene. Characterizations of rice husk surfaces were analyzed by FTIR, optical microscope and SEM micrograph. The mechanical properties of rice husk filled composites observed, showed that the maximum value obtained were for composites reinforced with alkali treated and coated with 10% of LENR (RHiNaLE 2). The tensile and impact strength obtained were 6.9 MPa and 24.6 kJ/m2 respectively. Effects of RHiNaLE 2 loading on tensile and impact strengths of composites showed that the properties decreased at higher loadings due to agglomeration of filler particles. However the tensile modulus and hardness were found to increase with filler loading. The dynamic mechanical thermal analysis also showed that composites prepared exhibited a shift in the tan delta peak (Tg) to a higher temperature due to the increased RHiNaLE 2-Matrix interaction. In conclusion, modification of rice husk surface via NaOH treatment and coating with LENR was successful in reducing the hydrophilic nature of rice husk powder. The RHi-Matrix interfacial adhesion had improved which lead to higher mechanical properties of the composites prepared.

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