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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 11 Documents
 1   2 
Search results for , issue "Vol 8, No 1 (2023)" : 11 Documents clear
Production and Characterization of Natural Acid-Base Indicator of Kendi Belang and Kendi Bukacu for School Chemistry Experiment Fatihah, Wahyu; Zidny, Robby
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.v8i1.16541

Abstract

The use of litmus paper seems wastefull and less environmentally friendly because it is only used once. For schlools that have difficulty getting litmus paper it can be a practicum obstacle to determine the acidity of the sample. In order to anticipate this problem, indicator paper was made using extracts of the telang flower (Clitoria ternatea) and the kencana ungu flower (Ruellia simplex) plant extracts. The purpose of the study was to observe the color changes that occurred in acid-base paper indicator namely KENDI BELANG (Kertas Indikator Bunga Telang) and KENDI BUKACU (Kertas Indikator Bunga Kencana Ungu) samples for a certain period of time. Other physical changes such as color, odor, flexibility and paper fibers were also observed. The research used an experimental method for 30 days. Research using experimental method for 30 days. The telang flowers and the kencana ungu are obtained from the environment around the house and then extracted. Whatman filter paper was macerated in plant extracts of telang flower (Clitoria ternatea) and purple golden flower (Ruellia simplex), with the addition of aquades and 70% alcohol as solvent. KENDI BELANG using 70% alcohol solvent produces the best quality indicator paper, because there is no change in color and other physical changes during observation. While less optimal result was found on KENDI BUKACU using distilled water, because the indicator paper produces an unpleasant odor, slightly stiff, and there was a color gradations in some samples of acids and bases.
Physical Stability Evaluation of Cassava Leaf Aqueous Extract Emulgel (Manihot esculenta) Rahman, Havizur; Sari, Indah; Sani, Fathnur
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.v8i1.15898

Abstract

Cassava leaves contain various secondary metabolites such as flavonoids and saponins that can be used as anti-inflammatory and antibacterial.This study aims to determine the physical stability of cassava leaf extract emulgel (Manihot esculenta), which can be used as an anti-inflammatory. Emulgel was made in 3 formulas with variations in the concentration of cassava leaf extract, namely 2.5%, 5%, and 7.5%. Emulgel stability tests include organoleptic tests, homogeneity, viscosity, dispersibility, adhesion, and pH. Stability testing using the cycling test method for 12 days of storage at temperatures 4oC and 40oC. This study showed cassava leaf extract can be formulated as emulgel and has good stability after storage at extreme temperatures for 12 days. Emulgel formulations from cassava leaf extract have good stability and can be anti-inflammatory.
Development of Chemical Physics Practicum Module Contextual Learning for Prospective Chemistry Teachers Wijayanti, Imas Eva; Aisyah, Ratna Sari Siti; Andini, Andini; Paridah, Ida; Khoirunnisa, Khoirunnisa; Sutihat, Sutihat
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.v8i1.17183

Abstract

Learning chemistry requires practicum which functions to enrich understanding of chemical materials. Practical practice should ideally be carried out in a laboratory as a representative place to produce accurate and precise data using validated practical instructions. This study aims to create a chemistry practicum guide that is designed to be carried out at home with facilities around the house so that it can function to train student independence. This research is a product development research in the form of using model Analyze, Design, Develop, Implement, and Evaluate (ADDIE). The resulting product was validated by 6 material and media expert validators and then tested limited to 15 chemistry teacher candidate students. The results showed that the practicum instructions obtained an Aikens score of 0.9 from the validator, which means they are valid and feasible to try out. Then after conducting trials and student responses, a response of 86% was obtained in the very good category. Based on the values from the validator and limited trials, these practical instructions can be used by prospective Chemistry teachers in teaching in the classroom and at home.
Nuclear Magnetic Resonance (NMR) as A Method of Characterizing Antigen Synthesis for Successful Antibody Production Assaat, Lusiani Dewi; Saepudin, Endang; Soejoedono, Retno Damayanti; Adji, Rahmat Setya; Fajriah, Sofa; Ivandini, Tribidasari Anggraningrum
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.v8i1.15572

Abstract

Antibody production is becoming a trend, especially during a pandemic like now, although there have been many developments in antibody production in previous research. Antigen synthesis and characterization is one of the determining factors for the success of antibody production. This research developed a method of antigen characterization using the Nuclear Magnetic Resonance (NMR) method. The research conducted in these 4 stages begins with antigen synthesis, then continues with antigen characterization using NMR, then antibody production, and the last stage is antibody characterization using the Enzyme Linked ImmunoAssay (ELISA) method. The results of antigen characterization using NMR show that NAS has been perfectly conjugated with BSA and produces a NAS-BSA conjugate. This is shown by the presence of 1 methylene (CH2) olefinic at δH chemical shift of 6.27 ppm with an integral of 4 and having 1 piece of methine (CH) sp2 at δH chemical shift of 5.73 ppm with an integral of 2. NAS-BSA antigens have been shown to successfully produce antibodies. This is shown from the anti-NAS-BSA, NAS, and Acrylamide antibodies that begin to appear in the second, third and fourth boosting (respectively)
Synthesis of Hollow Carbon Fiber from Acacia Leaves (Acacia mangium Willd) as Low Cost Biosorben Mayrizki, Maura; Darmayanti, Lita; Yenie, Elvi
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.v8i1.18693

Abstract

Acacia leaves have a cellulose, hemicellulose, and lignin content of 50.77%. The high content of cellulose can help the formation of hollow fiber structures. The hollow fiber structure makes it possible to carry out greater absorption. This study aims to determine the influence of chemical activator concentration and temperature on the physical activation of hollow carbon fiber characteristics and their ability to adsorb Fe. The synthesis of hollow fiber begins with drying the acacia using sunlight, followed by drying using an oven.  Furthermore, the acacia is grounded and sifted with a 60-mesh sieve. Acacia leaves were chemically activated with concentrations KOH of 0.5, 0.75, and 1 M was carbonized with a temperature of 500°C in a gas environment N2 and continued physical activation with a temperature of 700°C and 750°C using a flow of CO2 gas for 1 hour. The sample was characterized by proximate analysis, SEM, FTIR, and adsorption on Fe. The proximate analysis showed that the water content was 3.5%, ash content was 8.3%, volatile content was 15.4%, and iodine absorption was 761.4 mg/g. The highest Fe metal removal result obtained was 98.8%, with an adsorption capacity of 9,88 mg/g. The results showed that acacia leaf-based hollow carbon fiber has the potential to be an adsorbent to remove ion Fe in solution.
Physico-Chemical Characteristics of Lampung Natural Zeolite Functionalized Mercapto-Silane Azizah, Yulyani Nur; Rachman, Faizal
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.v8i1.18514

Abstract

Lampung natural zeolite (ZAL) is a potential adsorbent for metal pollutants.However, its adsorption capacity is still low due to the presence of impurities that cover the pores and active sites on its surface. To improve the adsorption performance, especially on soft acid Lewis metals/cations, ZAL needs to be activated and functionalized with organosilanes containing thiol groups (-SH) as soft Lewis bases such as (3-mercaptopropyl) trimethoxysilane (MPTMS). This study aims to determine the physicochemical properties of organosilane-modified natural zeolites. The MPTMS silanization process in ethanol: water (1:1, v/v) media was carried out on ZAL activated with 1 M HCl. Qualitatively, the success of the functionalization can be directly observed from the dispersion of the zeolite in organic and aqueous phases, where the hydrophobicity of the silane-modified zeolite (ZM-EA) increased compared to the natural zeolite. The functional group analysis results showed typical peaks of S-H and C-H at 2554 and 2930 cm-1. MPTMS functionalization produced five peaks of the typical diffraction pattern of clinoptilolite at 2θ: 10,4o; 17,8o; 22,8o; 28,3o; 30,5o; dan 32,4o. SEM-EDX results on ZM-EA showed the presence of a sulfur component of 4.75% (% At) with a Si/Al ratio >7.
Analysis of The Student's Ability to Interconnect Macro-Submicro-Symbolic Representation on Electrolyte Solution Concept Langitasari, Indah; Robandi, Babang
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.v8i1.19974

Abstract

A comprehensive understanding of chemistry requires thinking using three levels of interconnected representation: macroscopic, submicroscopic, and symbolic. Electrolyte solutions are one of the concepts in chemistry that need to involve the interconnection of the three levels of chemical representation in studying them. This study aims to analyze the students' ability to interconnect the three levels of chemical representation in the electrolyte solutions concept. This research used a descriptive quantitative research design. The research instrument used The Multiple Representation of Electrolyte Test (MRET). The research data were analyzed descriptively based on the students' answer patterns. The results showed that the student's ability to interconnect the three levels of chemical representation in the electrolyte solutions concept is low. Students are only able to make interconnections between macroscopic and symbolic levels.
Front Matter Vol 8 No 1 (Cover, Editorial Board, Preface, Table of Contents) Langitasari, Indah
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.v8i1.28539

Abstract

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 1 (Author Guidelines, Acknowledgment) Langitasari, Indah
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.v8i1.28543

Abstract

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