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Journal Of Research and Education Chemistry (JREC)
Published by Universitas Islam Riau
ISSN : 26858967     EISSN : 26858959     DOI : https://doi.org/10.25299/jrec.2022.vol4(1).9315
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education
1. research and reviews literature about chemistry education such as : instruction, learning and theaching, curriculum development, learning environment, theacher education, educational and educational development in chemistry education 2. research and review literature about chemistry such as : organic, inorganic physical, analitycal, biochemistry, material chemistry, environment, ethnochemistry and its application in teaching and learning
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 84 Documents
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Analisis Perbedaan Hasil Belajar Peserta Didik dengan Media Dakonic dan Sempotron dalam Pembelajaran Sistem Periodik Unsur Permatasari, Afita; Piola Naretin Rahayu, Inka; Kautsar Althaf D.I.H, Salsabila; Puji Astuti, Andari
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).25067

Abstract

This study aims to analyze the differences in student learning outcomes using Dakonic (Chemistry Dakon) and Sempotron (Electronic Abacus) media in learning the periodic system of elements. The research employed a quantitative method with a quasi-experimental design using the Nonequivalent Control Group Design. The subjects consisted of 72 tenth-grade students of SMA Negeri 15 Semarang, divided into a control class using Sempotron and an experimental class using Dakonic. The research instrument was a learning outcome test that had been validated and tested for reliability. Data were analyzed through normality test, homogeneity test, N-Gain, and t-test. The results showed that the experimental class obtained an average N-Gain of 0.701 (high category), while the control class only reached 0.479 (medium category). The t-test also revealed a significant difference between the two classes with a significance value of 0.000 (<0.05). These findings indicate that Dakonic is more effective in improving students’ understanding of the periodic system of elements compared to Sempotron. Therefore, Dakonic can be considered as an innovative, engaging, and culturally relevant chemistry learning medium
PENGEMBANGAN MEDIA PEMBELAJARAN KIMIA RAMAH BUDAYA: DAKONIC BERBASIS PERMAINAN DAKON Inka Piola; Permatasari, ⁠Afita; Kautsar Althaf D.I.H, ⁠Salsabila; Puji Astuti, ⁠Andari
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).25110

Abstract

This study developed a culturally responsive chemistry learning media based on the traditional game dakon, named DAKONIC (Dakon Periodic Chemistry), for teaching the Periodic Table of Elements. The research employed a Research and Development (R&D) method using the ADDIE model, involving 36 tenth-grade students at SMA Negeri 15 Semarang. Validation by material experts, media experts, and teachers indicated that DAKONIC was highly feasible with a 90% validity score. Practicality testing from teachers and students achieved 87% (practical category). Effectiveness testing using a paired sample t-test showed a significance value of 0.000 (< 0.05), confirming that DAKONIC effectively improved students’ understanding of the periodic table. The media was designed from recycled wood (90 × 30 cm) with 18 holes representing groups and periods, 2 large scoring holes, 118 element replicas, and 56 educational challenge cards. It is portable and equipped with a teaching module to support the Teams Games Tournament (TGT) cooperative learning model. Findings demonstrate that DAKONIC is feasible, practical, and effective, successfully integrating local cultural wisdom with modern chemistry learning.  
UJI EFEKTIVITAS METODE PEMBUATAN BIOKERAMIK CANGKANG TELUR MENGGUNAKAN SODIUM ALGINAT DAN PATI JAGUNG Khalyla Hafsa Khairunnisa; Mustofa Kamal, Dianta; Djonaedi, Emmidia
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).20065

Abstract

The utilization of eggshell waste in Indonesia is still very low, which is only around 7-8% of the total waste of 611,790 tons per year, although the calcium carbonate content has the potential to be used as a raw material for bioceramics. Suboptimal utilization risks polluting the environment. This study aims to develop the utilization of eggshell waste into bioceramics by comparing the effectiveness of two types of binders, namely sodium alginate and corn starch. The manufacturing method includes the process of powdering eggshells, mixing with binders, molding, and drying. Evaluation is carried out through density testing, water absorption, and degradation tests in water. The results showed that bioceramics with corn starch had a higher density (2.05 g/m³), lower water absorption (34.5%), and neutral pH of the degradation water (pH 7), compared to sodium alginate which had a lower density and higher absorption (50.5%) with pH 8. These findings indicate that corn starch is superior in forming stable and solid bioceramics, so it has the potential to be applied in environmentally friendly craft products and supports the reduction of organic waste in the community.
Pembuatan Bioetanol Dari Tandan Kosong Kelapa Sawit Menggunakan Teknik Imobilisasi Sel Saccharomyces Cerevisiae Nayandra Hazara Assyabil; Marlinda, Marlinda
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).21594

Abstract

Empty palm fruit bunches (TKKS) are solid waste from palm oil mills that have the potential to be used as raw material for bioethanol due to their high cellulose content of 45.95%. This study aims to produce bioethanol from TKKS using Saccharomyces Cerevisiae cell immobilization techniques. The variables used are Saccharomyces Cerevisiae cell immobilization concentrations of 15% and 20% (w/v) and fermentation times (1, 2, 3, 4, and 5 days). TKKS that had undergone a delignification process with 10% NaOH was weighed at 15 grams, then hydrolyzed using eco enzyme and fermented together with a nutrient solution and immobilized Saccharomyces Cerevisiae cells. The immobilization of Saccharomyces Cerevisiae cells was carried out using 10% Na-Alginate and 7% CaCl2. The best results were obtained at a cell immobilization concentration of 20% (w/v) and a fermentation time of 3 days, with a bioethanol content of 27.2470% (v/v) and a yield of 23.7910% (w/w). These results indicate that the Saccharomyces cerevisiae cell immobilization technique can increase the efficiency of bioethanol fermentation from TKKS.  
Karakterisasi Senyawa Bioaktif Dari Kulit Buah Naga (Hylocereus spp). Untuk Aplikasi Masker Rambut Nurhalizah Tolla Ts, Siti; Sinardi, Sinardi
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).23084

Abstract

Hair damage is not a trivial problem, because hair health is an important issue for women because it can reduce self-confidence in appearance. The purpose of this study was to determine the composition comparison of dragon fruit skin extract and to determine the feasibility of a hair mask from dragon fruit skin extract to maintain healthy hair and maintain the scalp. The process of making the mask begins by preparing dried dragon fruit skin and extracting it using 70% ethanol as much as 750 mL. The extract results are mixed with the addition of distilled water in various ratios, namely with a volume ratio between dragon fruit skin extract and distilled water of 1: 1, 2: 1, 3: 1, and 4: 1 where 15 mL of dragon fruit skin extract and 15 mL of distilled water, 20 mL of dragon fruit skin extract and 10 mL of distilled water, 22.5 mL of dragon fruit skin extract and 7.5 mL of distilled water, and 24 mL of dragon fruit skin extract and 6 mL of distilled water. Based on the results of the research conducted, dragon fruit skin extract can be formulated as a hair mask preparation, is a homogeneous and stable preparation with an oil-in-water (M/A) emulsion type, has a pH of 6.0, has a viscosity of 2,655 - 4,507 mPa.s, through Cycling Test for 3 cycles there is no change in shape, color and odor so that it is stable for up to 6 days at room temperature, does not cause irritation to hair or scalp, and is suitable for use in the community.
POTENSI TEPUNG TULANG BISON (BISON BISON) SEBAGAI ALTERNATIF BAHAN BAKU PAKAN TERNAK ainun, ainun; Iryani, A. Sry
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).23349

Abstract

Bison bone meal, a byproduct of the bison meat processing industry, has attracted attention as a source of minerals and protein for animal feed. A comprehensive analysis of the nutritional content of bison bone meal is needed to identify its specific advantages as a raw material for animal feed. This study aims to determine the potential of bison bone meal (Bison-bison) as an alternative raw material for animal feed. This study includes sample preparation, calcium analysis using the permanganatometry method, phosphorus analysis using the UV-Vis instrument, and nutritional content using the proximate method for water, ash, fat, and protein content parameters. Bison is a wild ruminant species known for its ability to adapt and survive in harsh environments. Bone meal is a feed raw material produced from animal processing waste. Bison bone meal has a significant mineral content, with a calcium (Ca) concentration ranging from 24-28% and phosphorus (P) 12-14%, creating a Ca:P ratio of around 2:1 which is ideal for animal nutrition. The content of bison bone meal is protein, fat, calcium and phosphorus. However, the main content of bison bone meal with the highest content is protein at 44.90%. The characterization carried out on bison bone meal is the analysis of water and ash content in bison bone meal with the results of the analysis of water content of 4.77% which is lower than the water content in beef bone meal. While the ash content is 37.69% and is greater when compared to beef bone meal. Based on SNI quality standards, each test parameter meets SNI standards. The addition of bison bone meal which is rich in protein and phosphorus to animal feed can improve the quality and productivity of livestock.
ANALISIS PENGARUH PERBEDAAN SUHU DAN WAKTU PENGERINGAN SAMPEL NIKEL ORE TERHADAP HASIL ANALISA LOGAM PADA MATERIAL NIKEL LATERIT MENGGUNAKAN ENERGY DISPERSIVE X-RAY FLUORESCENCE Fadillah, Rifdah; Gala , Selfina
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).24264

Abstract

Analysis of the Influence of Differences in Temperature and Drying Time of Nickel Ore Samples on the Metal Analysis Results of Lateritic Nickel Material Using Energy Dispersive X-Ray Fluorescence. This research aims to determine the effect of variations in temperature and drying time on the testing results of metal content in lateritic nickel samples using the Energy Dispersive X-Ray Fluorescence (EDXRF) method, as well as to evaluate the time efficiency in the sample preparation process. The temperature variations used are 105°C, 118°C, and 130°C, each with drying times of 4 hours, 6 hours, and 8 hours. The elements analyzed include Nickel (Ni), Iron (Fe), Silica (SiO₂), and Magnesium Oxide (MgO). The research results indicate that temperature and drying time have a significant impact on the concentration of the elements. A temperature of 105°C tends to produce valid levels, but with high residual humidity. In contrast, a temperature of 130°C increases heavy metal levels, causing volatility of light elements and significant data deviations. The optimal treatment for Ni and Fe values is found at 118°C and 105°C for 6 hours, while SiO₂ and MgO are only optimal at 105°C for 6 hours. However, if the Company's focus is only on Ni and Fe values, then 118°C and 6 hours are recommended as an efficient treatment in terms of working time and do not cause damage to the mineral structure of the sample, as well as optimal conditions in the drying process of laterite nickel sample preparation for analysis using EDXRF. This condition provides a balance between analysis accuracy, data stability, and time efficiency in the laboratory.
Analisis Nikel dan Besi pada Bijih Nikel Laterit Menggunakan XRF dengan Metode Pressed Powder dan Pressed Pellet: Analysis of Nickel and Iron in Laterite Nickel Ore Using XRF with Pressed Powder and Pressed Pellet Methods Rikal, Muh Rival; Gala, Selfina
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).25021

Abstract

Lateritic nickel ore is the main source of nickel in Indonesia and plays a crucial role in the mining industry. To evaluate ore quality, accurate analysis of nickel (Ni) and iron (Fe) content is required. X-Ray Fluorescence (XRF) is a widely used method because of its rapid and non-destructive nature, as well as its capability to analyze multiple elements simultaneously. However, the analytical results are strongly influenced by the sample preparation method. This study compares two preparation methods, namely pressed powder and pressed pellet, for determining Ni and Fe content in lateritic nickel ore using an Epsilon 4 XRF instrument at PT. Pakubumi Laboratory, North Morowali. The samples were prepared to a size of -200 mesh and tested with varying pressing durations (1, 2, and 3 minutes) for pressed powder and different pressures (20, 25, and 30 PSI) for pressed pellet. The results were statistically processed and compared with Certified Reference Material (CRM) values. The pressed pellet method at 25 PSI produced data closest to the reference values, with an average deviation of less than 1.5% for Ni and 0.2% for Fe across all ore categories. Conversely, the pressed powder method showed higher deviations of about 4–6%, although the 2-minute pressing duration provided slightly better accuracy than other variations. These findings highlight the importance of selecting an appropriate preparation method to ensure the validity of XRF results and recommend the pressed pellet method under optimal pressure as a standard procedure in geochemical analysis of lateritic nickel ore.  
PENGARUH WAKTU DAN SUHU PADA SINTESIS ALUMINIUM FORMAT METAL ORGANIC FRAMEWORK MENGGUNAKAN METODE SOLVOTHERMAL: Indonesia Aqilla Fadia Haya; Arifin, Zainal; Fitriyana, Fitriyana
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).21550

Abstract

Beverage cans are generally made of aluminum alloy and recyclable tin steel. Synthesis of aluminum formate metal organic framework (ALF-MOF) from waste cans, which has the potential to produce functional materials for gas storage, catalysis, and gas absorption applications. The solvothermal process involves the reaction between aluminum precursor solution from used beverage cans with organic ligands and solvents. This study aims to determine the effect of reaction time and temperature on the synthesis of ALF-MOF by solvothermal method. The research began by dissolving aluminum metal in beverage cans with NaOH and HCl to produce aluminum hydroxide. Then the synthesis of ALF-MOF was carried out following a one factor at a time (OFAT) experimental design with one variable. Aluminum hydroxide and formic acid were mixed with a mole ratio of 1:3. Next, ethanol-water solvent 1:1 was added as much as 30 mL. The mixture was reacted in an autoclave reactor with reaction time variations of 30, 60, 120, 360, 420 minutes and temperature variations of 80, 90, 100, 110, 120℃. Furthermore, the yield of ALF-MOF product was calculated and analyzed with FTIR instrument to determine the characteristics of its functional groups. The results showed that the optimal time was 360 minutes with a yield of 23.04%, while the best temperature was 100°C with a yield of 23.01%. FTIR analysis identified Al-O-Al groups at wave numbers 1089-1092 cm-¹, indicating the success of ALF-MOF synthesis.
Pengaruh Suhu Gelatinasi dan Suhu Pengeringan Terhadap Sifat Fisik Mekanik Edible Film Kitosan Cangkang Kepiting Rajungan Khairun Nisa, Khairun Nisa; Miranda Nur Wahidah; Noorma Kurnyawaty; Zainal Arifin
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).21663

Abstract

Edible film is a thin, consumable layer that serves as environmentally friendly packaging. One of its potential raw materials is chitosan derived from blue crab shells. This study aims to determine the effect of gelatinization temperature (30, 40, 50, 60, and 70 °C) and drying temperature (40, 50, 60, 70, and 80 °C) on the characteristics of edible films to obtain products that meet quality standards. The best result was achieved at a gelatinization temperature of 70 °C, producing a film with a thickness of 0.20 mm, moisture content of 14.27%, tensile strength of 38.82 MPa, and elongation of 90.58%. During the drying stage, with the gelatinization temperature maintained at 70 °C, the optimal condition was obtained at 80 °C, resulting in a film with a thickness of 0.15 mm, moisture content of 12.36%, tensile strength of 18.39 MPa, elongation of 119.83%, and 100% biodegradability. Increasing both the gelatinization and drying temperatures improved the physical properties and water resistance of the edible film. The elongation value met the JIS Z-1707:2019 grade 4 standard, and the biodegradability complied with SNI 7188.7:2016, although the tensile strength remained below the standard requirement.

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