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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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Critical Thinking Skills and Self-Regulated Learning Of Students during the Covid-19 Pandemic Linda lidiawati; Indarini Dwi Pursitasari; Leny Heliawati
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.v7i1.10627

Abstract

This study aims to analyze critical thinking skills and self-regulated learning of Junior High School Students on Change States of Matter material during online learning during Pandemic Covid 19. The research subjects were 200 junior high school students in the city and district of Bogor who had received the material for Change States of Matter. Data were collected using a test of critical thinking skills with multiple choice types and a questionnaire to measure students' self-regulated learning. The indicators used to measure critical thinking skills refer to FRISCO (Focus. Reason, Inference, Situation, Clarity, Overview), and indicators of learning independence include 3 phases, namely, planning, implementation, and evaluation. The data obtained were then analyzed descriptively and quantitatively. The results of this study indicate that the average level of students' critical thinking skills is still low, namely 33.34%, and the level of learning independence is quite good at 52.45%. There is a significant relationship between students' self-regulated learning and critical thinking skills (Sig = 0.000) in online learning mode.
Michelia Alba Flower Oil Components as Tyrosinase Inhibitors: In Silico Study Paundra Rizky Pratama; Felysia Isman; Cici Muarifah; Wahida Annisa Ermadayanti; Arif Fadlan
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.v7i1.12259

Abstract

Melanin is generally known as a protector of human skin against radiation. However, the excessive production of melanin induces hyperpigmentation and other skin disorders. Arbutin, kojic acid, and hydroquinone have been used as inhibitors for tyrosinase which involves the synthesis of melanin through melanogenesis, but they show adverse effects. This article reports the potential of methyl 2-methylbutyrate, β-pinene, limonene, 1,8-cineole, linalool, α-terpineol, geraniol, and β-phenyl ethylalcohol contained in the essential oils of Michelia alba as tyrosinase inhibitors by in silico study. The experiments were conducted through molecular docking against a human tyrosinase protein target (1BUG) followed by absorption, distribution, metabolism, excretion, and toxicity (ADMET) prediction. Geraniol, β-phenyl ethyl alcohol, α-terpineol, and limonene yielded better docking scores than hydroquinone. These four compounds and 1,8-cineole and β-pinene, showed lower docking scores than kojic acid. The compounds interacted with 1BUG through hydrogen bonding, Van der Walls, alkyl/π-alkyl interactions, and π-π stacking. ADMET analysis indicated that they were potential candidates for oral drugs.
Electrolysis Cell Learning Media Based on Virtual Reality Millealab Indah Langitasari; Isriyanti Affifah; Ratna Sari Siti Aisyah; Muhammad Alfian Pratama
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.v7i1.17576

Abstract

The electrolytic cell is a chemical material with abstract and concrete concept characteristics. Students often need help learning this material, especially connecting concrete and abstract concepts. Therefore, media is needed that can facilitate students in understanding electrolytic cell material, which is made interesting by utilizing virtual reality technology. The purpose of this research is to produce chemistry learning media based on virtual reality with a feasible and practical MilleaLab platform. The research uses the ADDIE development model (analysis, design, develop, implement, evaluate). The product of this research is virtual reality-based learning media on the MilleaLab platform. The validation assessment from media and material experts with an error rate of 5% based on the Aiken scale obtained Vcount ≥ Vtable (Vtable = 0.87). Each value in the validation of media and material experts is 0.89 and 0.87 with the Valid category. The results of assessing student responses regarding the practicality of this learning media get 88% in the Very Good category. Based on these results, it can be concluded that MilleaLab virtual reality-based learning media on electrolytic cell material is a learning medium that is practical and feasible to use.
Reactivity of Cetophenone and Its Derivatives with Semi-Empirise Methods Parameterizedmodel 6 (PM6) Topan Setiawan; Saras Wati Banapon; Intan Sapsuha; Wahyu Yusup Duwila
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.v7i1.11844

Abstract

Cetophenone is used as an intermediate in the synthesis of flavones. In industry, Cetophenone is obtained as a by-product of the oxidation of ethyl benzene. The method used for modeling Cetophenone derivatives is a semi-empirical method using (PM6). The cetophenone derivative which has a larger energy difference is found in the compound 2-aceyiylisophyhaloitrile. The highest value of electronegativity and chemical hardness was found in the compound 2-aceyiylisophyhaloitrile and the greatest potential energy value was found in the compound 2-aceyiylisophyhaloitrile.
Bioplastic Based on Taro Starch Modified Polyvinyl Alcohol and Eggshell (Starch-PVA-CT) with Degradability Study Siti Qomariah; Intan Syahbanu; Puji Ardiningsih
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.v7i2.14660

Abstract

Taro (Colocasia esculenta L. Schott) was potentially a raw material in the fabrication of bioplastic because of its biodegradability properties. Egg shells can be used as a filler in bioplastics because of their rich in calcium carbonate (CaCO3). This study aims to examine eggshell addition to starch-PVA-CT bioplastic properties. Taro tuber and eggshell were extracted first to obtain taro starch and calcium carbonate. Obtained products were incorporated with PVA, glycerol, and citric acid to produce bioplastics. Characteristic tests in this study included functional group analysis, hydrophilicity, mechanical properties, and degradation study in rivers. The taro starch obtained from this study was 4.8% from 900 g of taro tubers. Functional group analysis of bioplastics showed the presence of functional groups O-H, C-H, C-O ester, and C=O carbonyl. The hydrophilicity test showed the best percentage of water resistance in CL PVA/starch bioplastic (50% CT), and the decomposition in the river water environment reached 82%. The test results in this study showed that the best variation was in CL PVA/starch bioplastic (25% CT) with a tensile strength value of 2.05 Mpa and elongation at a break of 4%. These results meet the standards of SNI 7188.7:2016.
Thermal Stability Analysis of Cellulose From Sago Fiber Waste (Metroxylon sago) Nurmalasari, Nurmalasari; Lestari, Sastriana Jaya; Syamsuddin, Mimi; Sukarti, Sukarti; Alam, Muhammad Nur
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.v7i2.13491

Abstract

Sago pulp is a lignocellulosic waste rich in cellulose, so that it can be used optimally as a source of carbon and cellulose. Fixed carbon can be obtained maximally by determining the carbonization temperature. This research aims to determine the temperature of the cellulose sample starting to decompose and the energy required at the time of decomposition. The process of extracting cellulose from sago fiber waste uses NaOH alkalinization for delignification, bleaching with H2O2, and hydrolysis with HCl. Identification of lignin in sago fiber is known by the appearance of the C=O group in the wave region of 1734.01 cm-1 with strong intensity; after extraction, no peak number was found in the extracted cellulose FTIR spectrum. TGA analysis of cellulose underwent two stages of mass change, the first stage of decomposition of water molecules at a temperature of 47°C-203°C obtained a mass decrease of 5.69%, and the second stage of decomposition at a temperature of 287°C-397°C obtained a mass decrease of 58.95%. DSC analysis obtained two thermal properties of physical changes contained in two endothermic peaks, the first peak of water evaporation which required energy of 28,1120 J/g, and the second peak of decomposition, which required energy of 9.6188 J/g.
Experiment Design Analysis of Corrosion Inhibitor from Papaya Leaf Extract for Contextual Chemistry Learning Fuadatul Mukoningah; Retno Aliyatul Fikroh; Shofrina Surya Dewi
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.v7i2.15063

Abstract

The implementation of the 2013 curriculum, which focuses on the phenomenon of daily life, is part of the government's effort to improve the quality of education in Indonesia. Corrosion is one of the most common problems, so learning how to overcome corrosion is essential. The tannin content of papaya leaves has the potential to be a corrosion inhibitor. As a result, this study aims to investigate papaya leaf extract as a corrosion inhibitor and its potential as a contextual learning aid. The qualitative descriptive method was used in this study, with data collected through literature studies, observations, interviews, and experiments. The results showed that papaya leaf extract could be used as a corrosion inhibitor with a 73 percent efficiency in using a 20% inhibitor. Based on literature reviews, observations, and interviews with educators and students in Yogyakarta, papaya leaf experiments as an inhibitor can be a contextual learning alternative to corrosion material in senior high school in terms of finances, pedagogy, and human resources readiness.
Toxicity Test of Acehnese Plants Using The Brine Shrimp Lethality Test (BSLT) Method Mastura Mastura; Mauliza Mauliza; Hasby Hasby
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.v7i1.12341

Abstract

his study aimed to determine the potential toxicity of the ethanol extract of typical Acehnese plants to shrimp larvae (Artemia salina  Leach) using the Brine Shrimp Lethality Test (BSLT) method as indicated by the LC50 value. This study used 1,080 shrimp larvae divided into four groups (three groups of extract concentration series and one negative control group). Each group consists of 15 larvae with three repetitions (triple) of treatment. The four treatment groups were given the suspension of ethanol extract of Cananga flower and leaf extract (Cananga odorata), jeumpa flower and leaf (Michelia alba), and Tanjung flower and leaf (Mimusops elengi) with concentrations of 1000 ppm, 100 ppm, and 10 ppm. The mortality data of shrimp larvae were analyzed by probit analysis to determine the LC50 value. The result of this research is that the ethanol extract of the Cananga flower and leaf (Cananga odorata) has LC50 values of 55.71 ppm and 79.43 ppm, respectively. The ethanol extract of the jeumpa flower and leaf (Michelia alba) had LC50 values of 831.76 ppm and 398.10 ppm, respectively. The ethanol extract of the Tanjung flower and leaf (Mimusops elengi) had LC50 values of 295.12 ppm and 77.67 ppm, respectively.
Optimization of Biofuel Production from Used Cooking Oil Using Natural Zeolite Catalyst Isalmi Aziz; Siti Nurbayti; Reza Falepi
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.v7i2.13892

Abstract

Petroleum is still the primary energy used in the world. Its diminishing production is the trigger to find alternative energy to replace it. Biofuel is an alternative energy that has the potential to replace petroleum because it is renewable, environmentally friendly, and easy raw material. Waste such as used cooking oil can be used as raw material for making biofuels. The low price can reduce the cost of biofuel production. The conversion of oil into biofuel can be done using catalytic cracking with natural zeolite as a catalyst. This study aims to determine the optimum conditions for making biofuel from used cooking oil and determine its physical and chemical properties. The catalytic cracking process is carried out using an autoclave reactor. Used cooking oil and natural zeolite were introduced into the reactor, and the reaction was carried out by varying the time (1, 2, 3 hours), temperature (325, 350, 375oC), catalyst concentration (3, 5, 7%), and catalyst size. The product is distilled to produce biofuel (liquid), gas, and residue. The optimization results show that 3 hours, a temperature of 375oC, a catalyst concentration of 7%, and a catalyst size of 180µm are the optimum conditions for catalytic cracking with 44.94% biofuel yield. The resulting biofuel contains 73.48% hydrocarbons and 26.52% fatty acids. The hydrocarbon composition consists of 19.32% gasoline, 12.82% kerosene, and 35.11% diesel. The density of the biofuel produced is 0.8835g/mL, the flashpoint is 68oC, and the pourpoint is 27oC.
Linoleic Acid Isolation from Watermelon Seeds Oil (Citrullus lanatus L) with Urea Inclusion Method Divina Anindya Della; Hartati Soetjipto; November Rianto Aminu
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.v7i2.15128

Abstract

Nutritional problems still become a crucial issue in Indonesian public health. Fulfillment of nutritional balance is expected to improve life quality. In humans, one of the nutrients that play a role in the growth of brain and nervous system functions is PUFA, such as omega-6 and omega-3. Besides, fulfillment of nutritional balance can prevent some diseases; especially linoleic acid used to prevent some diseases. Linoleic acid is an omega-6 and essential fatty acid. Linoleic acid is the main essential fatty acid because it is the precursor for GLA, DGLA, and AA. Omega-6 works with omega-3 and some omega-3 benefits are supported or can arise by omega-6 presence. Studies reveal that watermelon contains high linoleic acid. This study aimed to determine the optimum temperature and ratio of fatty acids: urea for the isolation of linoleic acid from watermelon seed oil. The method used was urea inclusion with a variety of temperatures (-6oC, 6oC, 18oC) and the ratio of fatty acid: urea (1:1; 1:3; 1:5). The results showed the optimum watermelon seed oil linoleic acid isolate at 18oC and the ratio of fatty acids: urea 1:5 with linoleic acid purity (%) of 82.53%.

Page 14 of 21 | Total Record : 207

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