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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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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.
Scientific Critical Thinking Model to Improve Scientific Literacy and Self-Regulation Skills in Buffer Solution Learning Rusmansyah, Rusmansyah; Effendi, Akhmad Maulana; Mahdian, Mahdian; Aufa, Mohamad Nor
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.v8i2.15988

Abstract

The low inputs, processes, and learning outputs require competency assessments in science, one of which is scientific literacy and self-regulation. This study aims to determine the differences in scientific literacy and self-regulation of students in buffer solution materials. This study is quasi-experimental using a non-equivalent control group design. The study population consisted of 205 students from the XI MIPA SMAN 7 Banjarmasin class, and sampling used purposive sampling techniques with a sample of 69 students. Data collection was carried out using test instruments in the form of multiple-choice Three Tier Tests and non-tests in the form of self-regulation questionnaires. The collected data were analyzed using Multivariate Variance Analysis (MANOVA) with the help of SPSS 27.0 software. The results of hypothesis testing show a significance of <0.05, meaning that there is a significant influence of critical thinking models on these two variables. So, it can be concluded that there is an influence of scientific critical thinking models on scientific literacy abilities and students' self-regulation.
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 7 No 2 (Cover, Editorial Board, Preface, Table of Contents) Langitasari, Indah
EduChemia: Jurnal Kimia dan Pendidikan Vol 7, No 2 (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.v7i2.28549

Abstract

Analysis and Optimization of Betanin Extraction from Juice of the Peel and Fleshes of Red Dragon Fruit (Hylocereus costaricencis) Kania, Prina Puspa; Furqon, Ayi
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.v9i1.23409

Abstract

Currently, health issues are no longer related to how to treat diseases but rather prioritize the prevention of various diseases by eating foods that contain high levels of nutrients, known as functional foods. Red dragon fruit contains betanin dye, which has various health benefits and can be grouped into functional foods. Some studies have been conducted to obtain betanin from red dragon fruit, but it is not yet known how much betanin content is present in the juice of the flesh and peel of red dragon fruit (Hylocereus costaricencis) and how to determine the optimum extraction conditions. This study aims to analyze the betanin content in the skin and flesh of red dragon fruit and the optimal extraction conditions so that betanin can be obtained in maximum quantities. The extraction method used was the maceration method with three solvents, namely, water, ethanol, and methanol. Analysis of the betanin content in the skin and flesh of dragon fruit was carried out using UV‒Vis spectrophotometry. The results of the study revealed that water solvents can extract betanin well. In addition, the ratios of dragon fruit to water were 2:1 (flesh and water) and 1:1 (skin and water), respectively, while the optimum extraction temperature was 4–8°C. The optimum extraction time was 24 hours. Betanin was obtained from the skin and flesh of red dragon fruit at a sample:solvent ratio of 1:1, with values of 21.71 mg/mL and 17.8 mg/mL, respectively.
Comparison of Phytochemical Content and Toxicity of n-hexana Extracts and Fractions of Padina australis Panjaitan, Riong Seulina; Farida, Herni
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.v8i2.23357

Abstract

Padina australis is a brown macroalgae that is abundant in Indonesian coastal waters. It is known to contain bioactive compounds such as alkaloids, flavonoids, steroids, saponins, and tannins. This research aims to produce and determine the best extraction technique to increase the % yield and test the toxicity of the methanol extract and the n-hexane fraction of Padina australis. This study began with macroalgae sampling, determination, extraction (maceration and Ultrasound-Assisted Extraction (UAE)), phytochemical screening, liquid-liquid fractionation, thin layer chromatography, and BSLT (Brine Shrimp Lethality Test) toxicity testing. According to the research results, it is known that the UAE method provides the highest % yield of methanol extract at 10.86% compared to the maceration method, namely 4.76%. Furthermore, there was no difference in the phytochemical content of the two extraction methods. Meanwhile, there are differences in the phytochemical content of the n-hexane fraction, namely that the maceration method contains steroids, and the UAE contains steroids and saponins. Then, the toxicity test for the methanol extract obtained the highest LC50 value for the UAE method at 352.508 ppm, while for the n-hexane fraction, the highest LC50 value was 54.99 ppm. The methanol extract and n-hexane fraction in the toxicity test were included in the very toxic and toxic categories. The benefit of this research is to provide information about the comparison of the two extraction methods and toxicity tests of the methanol extract and n-hexane fraction of Padina australis.
Adsorption of Cadmium (Cd) Metal in Solution Using Pofa-Based Zeolite (Palm Oil Fly Ash) Darmayanti, Lita; Indriani, Lisa
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.v9i2.24846

Abstract

Cadmium is one of the heavy metals with high toxicity that can harm human health and the environment. A commonly used method to remove heavy metals is adsorption. One of the widely used adsorbents is zeolite, which is composed primarily of silica and alumina. Palm oil fly ash (POFA) is a waste from palm oil mills that is rich in silica and alumina so that it can be used as a basic material for zeolite. This research aims to study the factors that affect the adsorption process of Cd metal using zeolite synthesized from POFA and determine the kinetics and isotherms of adsorption. The factors observed were pH (3, 4, 5, 6; 7), adsorbent dosage (1, 1.5, 2, 2.5, 3 g/l), contact time (5, 10, 15, 30, 60, 90, 120, 150, 180 min), and initial concentration of Cd metal (2, 4, 6, 8, 10, 15 mg/L). Adsorbent characterization was performed by XRF and XRD analysis. The results showed that pofa-based zeolite can remove Cd metal with an efficiency above 95%. The adsorption process can follow well the pseudo-second-order kinetics model and both Langmuir and Freundlich isotherm models with a maximum adsorption capacity of 64.58 mg/g. The zeolite synthesized from POFA can remove Cd metal well and has the potential to be developed into an adsorbent
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

Page 16 of 21 | Total Record : 207

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