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EduChemia: Jurnal Kimia dan Pendidikan

EduChemia
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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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Limbah Cair Industri Minyak Goreng Sawit sebagai Bahan Baku Pembuatan Biodiesel Haryono MT; Solihudin Solihudin; Evy Ernawati; Surya Pramana
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 1 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Pada proses produksi minyak goreng sawit dihasilkan berbagai jenis limbah, salah satunya adalah limbah cair. Limbah cair tersebut diperkirakan masih mengandung asam lemak yang relatif potensial sebagai bahan baku untuk sintesis biodiesel. Penelitian ini bertujuan menentukan kondisi terbaik tahap transesterifikasi dengan katalis NaOH pada pemanfaatan limbah cair industri minyak goreng kelapa sawit sebagai bahan baku sintesis biodiesel. Kondisi terbaik tahap transesterifikasi tersebut dipelajari berdasarkan parameter rasio mol minyak terhadap metanol (1:5, 1:7, 1:9, dan 1:1) dan kadar katalis NaOH (0,3, 0,5, dan 0,7%-b/b). Sintesis biodiesel pada penelitian ini dilakukan melalui 5 tahap, yaitu: karakterisasi bahan baku, tahap esterifikasi dengan katalis H2SO4, tahap transesterifikasi dengan katalis NaOH, pemurnian biodiesel, dan karakterisasi biodiesel. Hasil penelitian menunjukkan bahwa kondisi terbaik pada tahap transesterifikasi dicapai pada reaksi dengan rasio mol minyak terhadap metanol sebesar 1:5 dan kadar katalis NaOH sebanyak 0,5%. Pada kondisi tersebut dihasilkan biodiesel dengan rendemen 87,62% dan karakteristik berupa densitas, viskositas, bilangan asam, titik nyala, dan kandungan energi berturut-turut sebesar 863,5 kg/m3, 4,1 mm2/s, 1,61 mg KOH/g biodiesel, 140ºC, dan 38,22 MJ/kg.

Development of Multiple Representation-Based General Chemistry Textbook Using Guided Inquiry Ifah Silfianah
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This study aims to describe the development process and determine the feasibility of multiple representation-based textbooks that are designed with a guided inquiry model. The method used in this research is the Research & Development (R&D) with the ADDIE (Analyze, Design, Develop, Implementation, Evaluate) model. Analyze stages are carried out in the form of curriculum analysis, concepts, and learning resources. In the design process, textbooks are made following the guided inquiry learning stages and design the media in the form of images that show multiple representations so that an initial draft is produced. At the Develop stage, draft books are printed and reproduced for validation and revision. The next step of implementation is carried out through a small-scale trial to determine the initial response to the textbook. In the final stage (Evaluation), the textbook on the results of the small-scale trial was revised to be used in the medium-scale trial to get the textbook's final response data. This study involved ten students in the chemical Tadris department in the small group and 29 students in the moderate group. The instrument used was the validation sheet and the language response sheet and the presentation of the textbook. Data of expert validation and trial results were analyzed descriptively and qualitatively in the form of percentages using a Likert scale. The results showed the feasibility of the content, linguistic, presentation, and graphic textbooks, respectively 95.33%, 94.76%, 92.16%, and 92.58%. The suitability of the textbooks with the guided inquiry syntax and multiple presentations was 98.33% each. A small group trial shows that the language aspect gets 84.33 scores, and the presentation aspect is 84.75. After the textbook was revised, the trial results for the medium group showed that the linguistic aspect value was 90.34, and the presentation aspect was 92.59. Overall it can be concluded that the textbooks developed are very suitable for use in learning.

Analysis of the Lead on Lip Tint Cosmetics on the Market Using UV-Vis Spectrophotometry Method Gatut Ari Wardani; Siti Laila Abiya; Fajar Setiawan
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Analysis of the lead on lip tint cosmetics on the market has been successfully carried out. Before conducting the lead analysis, the method is first validated using the standard addition and measured by UV-Vis spectrophotometry. The validation of the lead content analysis method in lip tint using the UV-Vis spectrophotometry method was stated to meet the validity requirements. The validity parameters include linearity test (correlation coefficient = 0.9916), limit of detection (0.17 ppm), limit of quantitation (0.57 ppm), accuracy test (% recovery for a concentration of 4 ppm = 97.5%, 8 ppm = 93.8%, and 14 ppm = 98.6%), and precision (< 2% for all concentrations). Imported lip tint samples circulating in the market area of the Tasikmalaya city contain lead with a concentration of 2.149 ppm, so it is still declared safe for use by the public.

Front Matter Vol 6 No 2 (Cover, Editorial Board, Preface, Table of Contents) EduChemia EduChemia
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Antibacterial Activity of Nanoemulsion Stem Fraction Pucuk Idat (Cratoxylum glaucum) Yopan Pratama; Robby Gus Mahardika; Adisyahputra Adisyahputra
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The idat plant is one of the endemic plants known to the people of bangka belitung as well the shoot of idat (Cratoxylum glaucum). Cratoxylum glaucum is widely used as a traditional the skin, treat diarrhea, as antibacterial, anticancer,antivirus, and other diseases. Based on the potential of activity,the development of an Cratoxylum glaucum extract in the from of nanoemulsi is carried out which has stability and a small droplet size so that it isvery effective as an antibacterial. The purpose of this study was determine how the characterization and antibacterial activity of nanoemulsion from the Cratoxylum glaucum. Nanoemulsion was made using a homogenizer at a stirring speed of 8000 rpm for 30 minutes with a composition of 2,5 ml VCO, 10 ml tween 80, and 37,5 ml water. Nanoemulsion fraction MeOH : water from the shoot idat has a droplet size of 101,6 nm with a PI value of 0,274 and has a transmittance percent of 80,33% which can be categorized as a nanoemulsion with good stability compared to ethyl acetate and n-hexane nanoemulsion. In addition, nanoemulsion MeOH : water an antibacterial activity of S. Aureus by 10,42 cm which is categorized as strong.

Preparation of TiO2 Nanotube Using Anodization Method: Charactherization and Its Application for CO Sensor Harry Budiman; Rahmat Wibowo; Oman Zuas; Jarnuzi Gunlazuardi
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Preparation of highly ordered TiO2 nanotube arrays (HOTNAs) by anodization of Ti foil industrial grade in ethylene glycol electrolyte containing 0.3% of ammonium fluoride and 2% of water at 30 V for 90 minutes was conducted. The morphology structure, chemical composition, functional group, crystal phase, and optical properties of HOTNAs were characterized by field emission scanning electron microscope (FE-SEM), Energy Dispersive X-Ray (EDX),Fourier transform infra-red spectroscopy (FTIR), X-ray diffraction (XRD), and ultraviolet visible diffuse reflectance spectroscopy (UV/Vis-DRS). The well-ordered nanotube with vertically oriented structure was formed in the HOTNAs having size in diameter, length, and wall thickness of 48,0 nm, 1,8 µm, and 26,7 nm, respectively. The fabricated HOTNAs were evaluated for their sensing properties for CO detection. The results show that the fabricated HOTNAs were able to detect 2500 ppm of CO gas with response about 93,429 at operation temperature 150 °C. This preliminary study of sensing performance demonstrates that the prepared HOTNAs under this study is potential and promising as a material sensor for CO detection.

Back Matter Vol 6 No 2 (Author Index, Subject Index, Author Guidelines, Acknowledgment) EduChemia, EduChemia
EduChemia: Jurnal Kimia dan Pendidikan Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Development of Electronic Module Based on POE (Prediction, Observation, Explanation) in Natural Organic Chemistry Learning Alfia Novera Indah Esa Kasih; Agus Sundaryono; Euis Nursa’adah
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Organic Chemistry of Natural Materials (KOBA) is a course that requires students to define, classify, and isolate compounds of natural materials. However, there are some students who still have difficulty understanding the application of material in everyday life. So that learning materials are needed that can make students active and independent in solving problems related to real life, namely by making E-Modules combined with the POE learning model. This study aims to obtain the validity of E-Module Based on POE products and to obtain questionnaire data on the responses of chemistry education students after using E-Module Based on POE. This type of research is Research and Development (R&D) with the Thiagarajan learning development model which consists of 4D (define, design, develop, and disseminate) which involves one group of subjects. The results showed that the E-Module Based on POE utilizing the Flip PDF Professional application produced a valid E-Module with an average CVR value of one. And the student response questionnaire data to the E-Module developed was 98.04% with the very good category. Means that the E-Module Based on POE developed can be a supplement to KOBA teaching materials.

Characterization and Anticancer Activity from Gaharu (Aquilaria malaccensis) Stem Bark Extract Tarso Rudiana; Elda Suci Yala Merru; Hendrawati Hendrawati; Dede Sukandar
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Aquilaria malaccensis is a plant species from the Thymeleaceae family. A. malaccensis contains secondary metabolites of phenolic groups, namely benzophenone, chromone, coumarin, xanthone, and flavonoids with various biological activities such as antioxidants and anticancer. This study aims to determine the potential of A. malaccensis stem bark extract as an anticancer and to determine the characteristics of secondary metabolite compounds contained in A. malaccensis stem bark extract. Extraction of the stem bark of A. malaccensis by maceration method in stages using n-hexane, ethyl acetate and methanol as solvents. The anticancer activity test used the microculture tetrazolium (MTT) assay against Murine Leukemia P-388 cells. Compound separation using thin layer chromatograph (TLC) and gravity column chromatography (CC) methods. Determination of chemical compounds using liquid chromatography mass spectroscopy/mass spectroscopy (LCMS/MS). The extracts of n-hexane, ethyl acetate, and methanol each had anticancer activity which was classified as active with an IC50 value of 20.64, 26.61, and 14.49 µg/mL. Based on the results of separation and identification of compounds in methanol extract with TLC, CC, and LCMS/MS, methanol extract contains acetaminophen, aminosamptothesin, isophorone, diethyl phthalate, 3-hydroxy-6H-benzochromen-6-one, isolongifolenic, 2-(2-phenethyl) chromone, 4′,7-dihydroxy-2′,5-dimethoxyisoflavone, 4-hydroxy-3-(1-phenylpropyl)-2H-chromone-2-one; 6-methylchromone-2-carboxylic acid; 3,4-dimethyl-2- phenylmorpholine; and β-calacoren compounds.

Green Synthesis and Characterization of Cinnamylideneacetophenone Compound Using Fe3O4 Magnetic as Catalyst Dori Fitria; Antonius Herry Cahyana; Agus Rimus Liandi
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Cinnamaldehyde is a compound found in the skin of cinnamon plants which has various bioactivity. In this study, the compound cinnamaldehyde was modified with the help of Fe3O4 which was synthesized with the help of seaweed extract as a heterogeneous catalyst. Fe3O4-MNPs are synthesized using FeCl3 and Sargassum filipendula extracts as their natural reducing agents. The catalytic ability of Fe3O4 was evaluated in the reaction between cinnamaldehyde and aromatic ketone compounds synthesized by the reflux method. Structure Analysis and elucidation of the synthesized compounds were carried out by measuring the vibrations of the functional groups by FTIR, and the determination of H and C atoms by HNMR and CNMR analysis. The FTIR, proton and carbon NMR analysis have identified that the synthesized product was cinnamylideneacetophenone by the name 1,5-diphenylpyenta-2,4-dien-1-one. The optimum conditions were obtained at a catalyst concentration of 10% w/w for five hours with a yield of 36%. The yield of this reaction was better than the reaction without a catalyst.

Page 12 of 21 | Total Record : 207

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Editorial Address Department of Chemistry Education - Universitas Sultan Ageng Tirtayasa Address : Jl. Ciwaru Raya No. 25, Sempu, Kota Serang, Banten 42117, Indonesia

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Contact Name
Indah Langitasari

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educhemia@untirta.ac.id

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Journal Mail Official
educhemia@untirta.ac.id

Editorial Address
Department of Chemistry Education - Universitas Sultan Ageng Tirtayasa Address : Jl. Ciwaru Raya No. 25, Sempu, Kota Serang, Banten 42117, Indonesia

Location
Kab. serang,

Banten

INDONESIA