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EduChemia: Jurnal Kimia dan Pendidikan
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 25024778     EISSN : 25024787     DOI : http://dx.doi.org/10.30870/educhemia.v6i2.10412
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology
Focus and Scope Educhemia (Jurnal Kimia dan Pendidikan) is Periodicals published the results of research related to the development of science and technology in the field of Chemistry and Chemistry education as a form of intellectual property Chemistry: Organic chemistry, Inorganic chemistry, Biochemistry, Physical chemistry, Analytical Chemistry, Environmental Chemistry, Material chemistry, Ethnochemistry. Chemistry education: chemistry learning design and model, chemical education curricula, Technology innovation and media/multimedia in chemistry learning, development of evaluation tools, lesson study and classroom action research
Arjuna Subject : Kimia(semua kategori) - Kimia Organik
Articles 207 Documents
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Biodiesel Synthesis of Crude Palm Oil By Using Bifunctional Catalyst Sn/Kaolinite and K2CO3 Noor, Abdullah Yamani; Usman, Thamrin; Wahyuni, Nelly
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 2 (2024)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i2.25035

Abstract

The relatively high content of free fatty acids in crude palm oil inhibits the direct synthesis of biodiesel. The use of a bifunctional solid heterogeneous catalyst allows for simultaneous transesterification-esterification reactions and facilitates the purification of the final product from the reaction mixture. This study aimed to synthesize biodiesel from crude palm oil via the use of a Sn-K/metakaolinite catalyst in a simultaneous transesterification-esterification reaction. Biodiesel synthesis was carried out using crude palm oil before and after pretreatment. The optimum conditions were determined by the reaction time (1–5 hours), reactant molar ratio (1:2, 1:4, 1:6, 1:8, 1:10, 1:12), and catalyst concentration (1,3, 5,7 and 9%), and the resulting methyl esters were measured for density, viscosity, and free fatty acids and analyzed via GC‒MS. The results obtained indicate that biodiesel synthesis was successfully carried out with completely converted methyl esters via treated crude palm oil. The optimum conditions for the reaction included a reaction time of 3 hours, a catalyst concentration of 5% and a reactant molar ratio of 1:10. The resulting methyl ester product has a density of 0.86 g/mL, a viscosity of 3.02 cSt and a free fatty acid content of 0.059%. The results of the GC‒MS analysis revealed that the dominant methyl ester components were methyl oleate and methyl palmitate. The synthesis of biodiesel from crude palm oil with a Sn-K/metakaolinite catalyst has been proven to be carried out in simultaneous transesterification-esterification reactions with good catalytic activity.
Bioplastic from Jackfruit Seed Starch and It Is Potency for Education for Sustainable Development (ESD) in Chemistry Learning Purba, Ester Yuliati Cristina; Hernani, Hernani; Supriatna, Asep
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.25426

Abstract

Plastic waste is a severe environmental problem. One solution is with bioplastic from jackfruit seed starch (JS). However, this bioplastic has weaknesses, such as not being heat resistant and having low mechanical properties, so adding chitosan (CH) and glycerol is necessary to strengthen it. This study aims to determine the optimum conditions for making bioplastics from jackfruit seed starch (JS) with the addition of chitosan (CH) and its potential in ESD-oriented chemistry learning. The methods used were laboratory experiments to determine the optimum conditions for making bioplastics, and an open-ended questionnaire to determine the potential of bioplastics as an ESD-oriented chemistry learning topic. The results of this study obtained tensile strength A1 (0.904 MPa), A2 (0.669 MPa), A3 (0.541 MPa), A4 (0.618 MPa), A5 (1.357 MPa), and A6 (6.140 MPa). The elongation test resulted in A1 (15.8%), A2 (16.5%), A3 (23.7%), A4 (35.7%), A5 (58.1%), and A6 (40.1%). The addition of chitosan increases the tensile strength and elongation values of bioplastics. The A3 and A4 bioplastics biodegradation tests were optimally decomposed within 5 days with a mass loss of 94%. Questionnaire results from 40 students showed that the topic of bioplastics has the potential to be integrated with project-based ESD lectures. Thus, bioplastic making can be used as one of the chemistry learning topics in project-based ESD lectures.
Development of Polypyrrole/Graphene Oxide Gas Sensor for Detection of Coffee Aroma Muflihah, Yeni Maulidah; Ardyanti, Zona Salsabila; Zein, Inayatul Aulia Rizka; Zulfikar, Zulfikar; Siswoyo, Siswoyo; Asnawati, Asnawati; Mulyono, Tri
EduChemia: Jurnal Kimia dan Pendidikan Vol 8, No 1 (2023)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v8i1.18231

Abstract

Detecting and characterizing coffee aroma is crucial for determining the quality of coffee. While gas chromatography is the standard method, using gas sensors is a feasible alternative. The electrode material used extensively influences the response produced by the gas sensor. This study explores using composites of the conductive polymer polypyrrole (PPy) and graphene oxide (GO) as materials for gas sensor electrodes. In the study, we synthesized PPy and GO and characterized them using UV-Vis and FTIR spectrophotometry, confirming that the compounds obtained were PPy and GO. The researchers varied the composition and thickness of PPy/GO in electrode fabrication. Varying the percentage of GO in the composite by 0, 5, 10, and 15% GO resulted in different PPy/GO compositions, while electrode thicknesses observed were 0.083, 0.21, 0.39, and 60 mm. Electrode characterization, including sensitivity, conductivity, and response time, showed that the PPy/GO electrode with a composition of 15% GO and a thickness of 0.21 mm had the best response. The PPy/GO sensor was tested on the aroma of Robusta coffee from three different plantations in the Jember area, East Java. It was able to distinguish the aroma of coffee. Measurement of electrode reproducibility in measuring each sample for one month showed consistent results from week to week, with a %RSD of less than 5%. The research results demonstrate that the PPy/GO sensor with a GO composition of 15% and a thickness of 0.21 mm has excellent potential for differentiating the aroma of coffee with different compositions of constituent compounds.
Back Matter Vol 8 No 2 (Author Guidelines, Subject Index, Author Index, Acknowledgment) Langitasari, Indah
EduChemia: Jurnal Kimia dan Pendidikan Vol 8, No 2 (2023)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v8i2.28542

Abstract

Oleogels from Watermelon Rind Extract and Orange Peel Essential Oil for Hair Nutrition Erlina, Iis; Fadilah, Nisa Lelita; Yulianti, Dwi Indah; Adiba, Asfiah; Febriany, Retno Putri; Ilmiawati, Auliya
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.24709

Abstract

Watermelon rind extract is rich in protein, citrulline, and lycopene, whereas orange peel essential oil contains vitamins A, C, and E. Both ingredients have demonstrated potential in preventing hair loss. This study aimed to develop an oleogel that combines these two components to address hair loss. The efficacy of the oleogel for promoting hair growth was evaluated in male DDY (Deutchland Denken Yonken) mice. The oleogel characteristics, including pH, viscosity, color, homogeneity, oil binding capacity, spreadability, and organoleptic evaluations, were assessed through physical quality tests. Organoleptic analysis was conducted with 30 respondents from IPB University to identify the most preferred oleogel formulation. The yield of watermelon rind extract was 28.88%, while the orange peel essential oil constituted 2% (v/w) of the formulation. The optimal oleogel contained 3% watermelon rind extract and 1% orange peel essential oil, resulting in 100% hair growth in the mice. All the formulations met the standard requirements for oleogels, with the most favored being Formula F3, which includes 1% watermelon rind extract and 3% orange peel essential oil. This research highlights the potential of watermelon rind extract and orange peel essential oils as effective nutrients for hair loss treatment.
Kinetics Studies of Ciprofloxacin Waste Degradation Using TiO2 Nanotubes from The Anodization Process Kustiningsih, Indar; Putri, Berliana Tristati; Putri, Martina Reza; Kurniawan, Teguh; Sari, Denni Kartika; Adiwibowo, Muhammad Triyogo; Slamet, Slamet
EduChemia: Jurnal Kimia dan Pendidikan Vol 8, No 2 (2023)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v8i2.23963

Abstract

ecosystems and alter the genetic code of normal bacteria, resulting in bacterial resistance. Ciprofloxacin (CIP) is one of the antibiotics that can be an environmental challenge if it accumulates in certain quantities. The process that can be used to eliminate CIP waste from water is the photocatalysis process. This work aimed to study the kinetics of CIP degradation using TiO2 nanotubes (TNTAs) from the anodization process. TNTAs with varying water contents and voltages are produced during the anodization process. TNTAs are synthesized by anodizing organic electrolyte solutions with different voltages (40, 50, and 60 V) and water contents (20, 25, and 30%). The TNTAs are then employed in CIP waste degradation with variations in the initial pH of the waste (pH 5-8) for 3 hours. SEM and XRD were used in this investigation to characterize the catalyst. SEM results illustrate the effect of voltage and water content on the anodization process with increasing contact surface area. XRD data demonstrate the presence of anatase phase crystals produced in TNTAs. The results showed that the kinetics of the CIP degradation reaction followed order one, with the best kinetic constant attained at 8.24 hours-1.
Front Matter Vol 7 No 1 (Cover, Editorial Board, Preface, Table of Contents) Langitasari, Indah
EduChemia: Jurnal Kimia dan Pendidikan Vol 7, No 1 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i1.28552

Abstract

Back Matter Vol 9 No 1 (Author Guidelines, Acknowledgment) Langitasari, Indah
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.28495

Abstract

Antidiabetic Activities In Vitro and In Silico of Nonpolar Compounds in Patat Leaves (Phrynium capitatum) Wijayanti, Laras; Marvel, Marvel; Ma’arif, Samsul; Fathoni, Ahmad
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.21935

Abstract

One form of Indonesian cultural wisdom is the use of leaves as food packaging. In addition to being used as a packaging material, patat leaves are also believed to have antidiabetic benefits. Antidiabetic activity can be assessed through the enzyme α-glucosidase inhibitory activities. In this research, an in vitro and in silico analysis of antidiabetic activity was conducted for the first time on nonpolar extracts of patat leaves. In vitro analysis was conducted using the α-glucosidase enzyme inhibition method, compound analysis was conducted using GC‒MS/MS, and an in silico study was conducted via the molecular docking method to the α-glucosidase receptor (PDB: 3W37). The results showed that the nonpolar extract (n-hexane) had very weak antidiabetic activity (with an IC50 >> 100 ppm). However, the sample inhibited α-glucosidase enzyme activity by up to 86.91%. GC‒MS/MS analysis confirmed the presence of 19 compounds in the nonpolar extract of the patat leaves. Straight-chain hydrocarbons dominate the compounds. The compound with the greatest abundance was Octadecyl 2,2,2-trifluoroacetate (RT 33.908; 9.53% area). An in silico test revealed that the compound with the greatest potential as an antidiabetic agent was γ-methylionone (40.78 μM). On the basis of the results of this theoretical approach, the compound can be further analyzed to validate its activity.
Correlation Analysis of Radical Polymerization Reactor Operating Conditions to Industrial Scale Swelling Capacity of Superabsorbent Ilham, Willy Aulia; Kurniawan, Teguh; Saepurahman, Saepurahman; Aisyah, Ratna Sari siti
EduChemia: Jurnal Kimia dan Pendidikan Vol 8, No 2 (2023)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v8i2.18853

Abstract

Superabsorbent polymer (SAP) is a polymer that has one function as an absorbent material in baby diapers, whose quality is determined by the number of swelling capacity (SC). Many previous studies regarding the effect of synthesis parameters on the number of SC were limited to the laboratory scale, where the polymerization conditions, the number of variables, and SC data obtained were very limited, in contrast to the industrial scale. The radical polymerization stage, with its accompanying operating variables such as reaction temperature, monomer concentration, retention time, crosslinker concentration, the addition of nitrogen gas, and initiator concentration, affects the value of SC in industrial-scale production. This study aims to analyse the correlation between the reactor operating conditions and the number of SAP SC obtained. Correlation data analysis was done using Microsoft Excel with Data Analysis Toolpak and Python by utilizing production data with a total of 1,562 entries, where the correlation between each variable was calculated using Pearson’s correlation coefficient. The analysis determined that the variables that had the strongest correlation with the SC were retention time and reaction temperature, with correlation coefficient values of 0.31 and -0.26. The weakest correlation was obtained from the addition of nitrogen gas and an initiator with a value of -0.07 and -0.02. Positive values indicate a relationship that is directly proportional, while negative values indicate an inverse relationship. Based on the correlation analyses and trends, the ideal polymerization conditions have been identified.

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