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All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) QUANTUM: Jurnal Inovasi Pendidikan Sains Jurnal Akademika Kimia Guru Tua : Jurnal Pendidikan dan Pembelajaran International Journal of Active Learning Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Jurnal Jejaring Matematika dan Sains Jurnal Pengabdian kepada Masyarakat Nusantara Ideguru: Jurnal Karya Ilmiah Guru Jurnal Riset Pendidikan MIPA Panrannuangku Jurnal Pengabdian Masyarakat EduLine: Journal of Education and Learning Innovation Media Eksakta Jurnal Akademika Kimia Jurnal Ilmu Pendidikan Indonesia Jurnal Kreatif Online Jurnal Banua Oge Tadulako Journal International Journal of Teaching and Learning (INJOTEL) Jurnal Akademika Kimia
Afadil
Program Studi Pendidikan Kimia, Fakultas Keguruan Dan Ilmu Pendidikan, Universitas Tadulako, Palu, Sulawesi Tengah, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Library & Information Science Mathematics Physics Public Health Social Sciences Other

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Analysis of Lycopene Content and Antioxidant Activity Test of Katokkon Chili Extract (Capsicum chinense Jacq) Febryna V. Maddo; Siti Aminah; Afadil Afadil
Jurnal Akademika Kimia Vol. 10 No. 4 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2021.v10.i4.pp224-229

Abstract

This study aimed to determine lycopene contents and the antioxidant activity of katokkon chili extract. The extraction process of katokkon chili used the maceration method with the mixture of n-hexane : acetone : ethanol (2:1:1). The concentrated extract of katokkon chili was obtained through the evaporator process at a temperature of 40 ˚C. The analysis process used a UV-Vis spectrophotometer in which the absorbance reading was at λ = 472 nm. The average content of lycopene in katokkon chili extract was 1.457 mg/100g. Testing the antioxidant activity of katokkon chili extract used the DPPH (2,2-diphenyl-1-picrylhydrazyl) method with positive control the vitamin C. The absorbance readings for the antioxidant activity test were at λ = 517 nm. The test results showed that the antioxidant power of katokkon and vitamin C extracts in reducing DPPH free radicals had a similar result which was equally strong. The IC50 value for chili katokkon extract was 13.84 mg/L, and the IC50 value for vitamin C was 5.78 mg/L, so it can be concluded that chili katokkon can be an alternative source of natural antioxidants to replace vitamin C.
Conceptual Changes of Students in Thermodynamics in Physical Chemistry Course Through The Implementation of Blended Learning Afadil Afadil; Sitti Rahmawati; Suherman Suherman
Jurnal Akademika Kimia Vol. 10 No. 3 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2021.v10.i3.pp174-181

Abstract

This study aims to determine the conceptual changes of students after participating in learning with a blended learning approach on Thermodynamics material. This research is a type of pre-experimental (pre-experimental design) with a One Group Pretest-Postest Design. The blended learning approach is applied using the Problem Based Learning model. The research sample was Class C Odd Semester 2019/2020 students which consisted of 34 students who programmed Physical Chemistry courses. The instrument used is a two-tier multiple choice test which includes concepts in Thermodynamics material which is equipped with a valid CRI. The blended learning approach is one approach that can be used that facilitates student activities in utilizing ICT through the delivery of materials, discussion of task completion, and training in the search for teaching materials on Thermodynamics material. The results showed that misconceptions still occur in every concept of Thermodynamics. The average reduction of misconceptions (MC) is 11.2%, the increase in the number of students to knowing concept (KC) classically is 19.2%, and the decrease in the number of students unknowing concept (UKC) is classically 8.1%. Students' conceptual changes to the material of Thermodynamics are still low. Students are required to understand well the content of the material related to basic concepts, mathematical equations (formulas), and the applicative forms of concepts in everyday life in accordance with the characteristics of the thermodynamic material.
Copigmentation of Flavonoids of the Gadung Mango Bark (Mangifera Sp) as a Coloring Substance Moh. Sahril; Vanny M. A. Tiwow; Afadil Afadil
Jurnal Akademika Kimia Vol. 10 No. 4 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2021.v10.i4.pp260-268

Abstract

Flavonoids are pigments in the gadung mango bark that produce a yellow color. The research on copigmentation of flavonoids from gadung mango bark (Mangifera sp) as coloring agents was carried out by the maceration method using 96% ethanol. The extract obtained was concentrated using a vacuum rotary evaporator at 40 oC. The study aimed to determine levels of flavonoids and stability of color gadung mango bark on the inner and outer of the result copigmentation as a coloring agent. Measurement of total flavonoid levels at a wavelength of 520 nm and 700 nm using UV-Vis spectrophotometry. The results of this study indicate that the total flavonoids levels in the inner and outer gadung mango bark samples were 0.162 mg/g and 0.359 mg/g, respectively. The color stability of flavonoids of the gadung mango bark inside and outside as the results of copigmentation was stable at the temperature 35 oC and the results obtained in the color stability test of the hero cloth through washing soap water was with a 0 day in 5 hours.
The Use of Augmented Reality Based-Learning Media to Reduce Students' Misconceptions Frelyana Tiro; Afadil Afadil
Jurnal Akademika Kimia Vol. 11 No. 3 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i3.pp140-145

Abstract

The research objective is to determine whether using AR molecules as a learning medium can assist students in reducing their misconceptions about molecular materials. It was pre-experimental research with a one-group pre-test-post-test design. The average level of validity of the learning media used, according to the findings, is 70.3% ("valid" classification). The average reduction of misconceptions (MC) among students using learning media for the entire concept is 12.8 %, 9.2 % for students who do not understand the concept (DUC), and 22.0 % for students who understand the concept (UC). Based on these findings, it is possible to conclude that AR molecule-based learning media can be used to reduce students' misconceptions about molecular materials.
Utilization of Hyperdocs in Online Learning Models on Student Learning Outcomes Hasmawati Hasmawati; Daud K. Walanda; Afadil Afadil; Kasmudin Mustapa; Detris Poba
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i4.pp261-265

Abstract

This study aims to improve student learning outcomes through online learning models by utilizing hyperdocs on buffer solution material in class XI MAN 1 Palu City. This type of research uses a quasi-experiment with a pretest and posttest Group Design. Quantitative descriptive research with mixed methods and sampling by purposive sampling. The sample in this study were students of class XI MIPA 1 as the experimental class and XI MIPA 3 as the control class. The instrument used in this study was a learning achievement test totaling 16 multiple-choice question numbers. The research results were obtained from both classes, namely for the experimental class of 81.14 and the control class of 77.05. Learning outcomes were analyzed by testing the effect size for the experimental class, namely 1.2 (Very Large) and 1.0 (Large) for the control class. Based on the results of the study it can be concluded that the online learning model by utilizing hyperdocs in class XI MAN 1 Palu City students can improve student learning outcomes.
Activation of Durian Skin Biomass with H2SO4 Activator on the Absorption of Lead from its Solution Irwan Said; Fahrul Riski; Afadil Afadil; Purnama Ningsih
Jurnal Akademika Kimia Vol. 12 No. 1 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i1.pp44-51

Abstract

Research has been carried out on the bioabsorption of lead (Pb) using durian skin biomass (Durio zibethinus) which has been activated using an H2SO4 activator. The durian skin sample used was durian skin from Central Sulawesi. The processing technique to remove lead (Pb) from liquid waste was carried out by an adsorption process. The adsorption process is an effective purification and separation technique used in industry because it is more economical and simple in treating wastewater and is a technique that is often used to reduce metal ions in wastewater. This study aims to determine the mass and contact time of the adsorption of Pb by durian skin biomass. Determination of the adsorbed metal used atomic absorption spectrophotometry (AAS). The results obtained showed that the optimal Pb ion adsorption occurred at a weight of 2.5 grams with an absorption capacity of 99.94 %. While the optimal Pb ion adsorption occurred at a contact time of 40 minutes with an absorption capacity of 99.94 %.
Learning Difficulties and Students' Ability Level During Pandemic Covid-19 on the Subject of Thermochemistry Rizza R. T. Agustina; Afadil Afadil; Sitti Rahmawati; Vanny M. A. Tiwow
Jurnal Akademika Kimia Vol. 12 No. 1 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i1.pp26-31

Abstract

This study aims to identify learning difficulties learning experienced by students on the subject thermochemistry in class XI IPA SMA Negeri 8 Palu during the Covid-19 pandemic for the 2021 / 2022 school year. The instruments used in this study are thermochemistry tests, questionnaires, and interviews. The result showed students’ difficulties in the subject thermochemistry in class XI IPA was 60 %, the highest difficulty of students is found in the thermochemistry test of calculating the heat of the type of compound, calculating enthalpy changes, and formulating steps and hypotheses of an experiment. The difficulty is indicated by the low level of student comprehension of 54 %, medium 43 %, and high 3 % with an average of 30%. Furthermore, the difficulty of students in participating in chemistry learning during the Covid-19 pandemic is technical difficulties with a percentage of 65.92 %, difficulties in implementing learning with a percentage 0f 65.44 %, and external difficulties (environment and parents) with a percentage of 52.92 %. based on these results, the learning difficulties experienced by students during chemistry learning thermochemistry subjects during the Covid-19 pandemic include students often being constrained by signals and quotas to access materials on the internet and do not have student handbooks to study at home, difficulty understanding chemistry concepts because teacher explanations are elusive, students are not active in participating in learning because chemistry learning during the pandemic is not interesting, can’t afford chemistry books and quotas also parents don’t provide motivation and students are often lazy to do assignments because no one helps with doing. The result of this study indicates that the level of students' difficulties learning about thermochemistry is a quite high category with a low level of student ability and students agree that it is difficult to study chemistry during the pandemic Covid-19.
Improving Students' Independent Learning Outcomes and Science Through Discovery Learning Matamay, Zubair; Sakung, Jamaludin M; Afadil, Afadil
Jurnal Riset Pendidikan MIPA Vol. 7 No. 1 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j25490192.2023.v7.i1.pp14-18

Abstract

This study aims to improve student learning outcomes and independence through discovery learning in science subjects. Class action research methods. In the pre-action, there were 5 students (26.3%) who had fulfilled the KKM and there were 14 students (73.7%) who had not. In cycle I there were 10 students (52.7%) who fulfilled the KKM and 9 students (47.3%) who did not. Student independence was obtained by 12 students (63.16%) with sufficient criteria. and 7 students (36.84%) in less criteria. In cycle II there were 15 students (78.9%) who fulfilled the KKM and 4 students (21.1%) who had not, obtained student independence, namely there were 7 students (36.84%) with good criteria, there were 10 students (52.63 %) was sufficient, and there were 2 students (10.53%) lacking. The percentage of students who scored above the KKM in cycle I was 52.6% and cycle II was 78.9%, this shows that the discovery learning method was able to improve students' science learning outcomes.
ANALYSIS OF STUDENTS’ CREATIVE THINKING ABILITIES IN SOLVING PROBLEMS IN CHEMICAL BONDING MATERIAL FOR CLASS X SMA IN THE TOGEAN ISLAND Pulukadang , Sri Hastuti Virgianti; Indasari, Indasari; Afadil; Mustapa, Kasmudin
Jurnal Ilmu Pendidikan Indonesia Vol 11 No 3 (2023): JURNAL ILMU PENDIDIKAN INDONSIA
Publisher : Program Magister Pendidikan IPA, Program Pascasarjana Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jipi.v11i3.3386

Abstract

Creative Thinking is the ability possessed by someone to think continuously and consistently in producing everything that is creative and original. This study aims to analyze students' creative thinking skills in solving problems in chemical bonding material for class X high school in the Togean Islands, namely taking place in two schools, namely SMA Negeri 1 Togean and SMA Negeri 1 Una- Una. The method used in this research is descriptive. The sample in this study was students of class X mipa SMA Negeri 1 Togean totaling 21 students consisting of 10 boys and 11 girls and for SMA Negeri 1 Una-Una totaling 19 student consisting of 13 boys and 6 girls. The data collection instrument used a practice test of essay questions in the form of a description of students' creative thinking abilities on chemical bonding material as many as 8 items. The result obtained for SMA Negeri 1 Togean, the fluency indicator is 76.66% in the high category, the Flexibility indicator is 60.47% in the medium category, the Originality indicator is 45.71% in the low category and the Elaboration indicator is 31.90% in the very low and for SMA Negeri 1 Una-Una the Fluency indicator is 66.31% with the medium category, the Flexibility indicator is 76.31% with the high, the Originality indicator is 52.10% with the low category and the Elaboration indicator is 35.78% with very low category. The result of the average creative thinking ability of students for SMA Negeri 1 Togean is 53.68% is in the low category, and SMA Negeri 1 Una-Una is 57.63% and is in the low category. Based on the result of the study it can be concluded that students' creative thinking abilities are in the low category, one of the reasons is due to the laziness factor of each student in participating in ongoing learning which triggers students not to think creatively, especially in chemical bonding material
DEVELOPING A CONSTRUCTIVISM APPROACH IN MATHEMATICS LEARNING Nursupiamin; N.Tangge, Lilies; Afadil, Afadil
International Journal of Teaching and Learning Vol. 2 No. 6 (2024): JUNE
Publisher : Adisam Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Mathematics learning characterized by constructivism emphasizes building one's own understanding actively, creatively and productively based on previous knowledge and experience. The teacher's task in applying constructivism to mathematics learning is not only to transmit ideas to students, but also to change the conceptions they have to develop them, therefore teachers need to pay attention to students' initial conceptions before learning begins, this aims to make it easier for students in the process. processing new knowledge that will be received. In the implementation stage of constructivist mathematics learning, teachers must understand aspects of mathematics learning that are based on constructivist theory. In this regard, a number of aspects related to mathematics learning, namely (1) students construct mathematical knowledge by integrating the ideas they have, (2) mathematics becomes more meaningful because students understand it, (3) students' strategies are better assessed, and ( 4) students have the opportunity to discuss and exchange experiences and knowledge with their friends. Based on these aspects, as much as possible, the implementation of constructivism in mathematics learning must start from basic education for children.
Co-Authors AA Sudharmawan, AA Agustin Tiwow Ahdiat, Mohammad Alimuddin, Chatifah Amran Rede Anang W. M. Diah Anang Wahid M.Diah Ardiansyah Asmita, Asmita Azzajjad, Muhammad Fath Baharuddin Hamzah Baharuddin Hamzah Catri, Ni Made Dariati Dariati Daud Karel Walanda Detris Poba Devi, Sinta Dewi Masyitha Dewi Satria Ahmar Diah, Anang WM Ersa W. Lakukua Esterlina Marpaung, Meida Fahrul Riski Febryna V. Maddo Frelyana Tiro H.J, Nur Rahmadana Safitri Haeruddin Haeruddin Hajerina, Hajerina Halawa, Adrianus Hasmawati Hasmawati Holyness Nurdin Singadimedja Indasari, Indasari Irwan Irwan Irwan Said Jamaludin M Sakung Kasmudin Mustapa Lilies N Tangge M. Diah, Anang Wahid Magfirah Magfirah Magfirah, Magfirah Marpaung, Meida E. Matamay, Zubair Mery Napitupulu Minarni Rama Jura Minarni Rama Jura Moh. Raisul Moh. Sahril Mohammad Jamhari Mohammad Jamhari N. Tangge, Lilies N.Tangge, Lilies Narayanti, Putu Satya Nur Qamariya Nur Rahmah Nurjannah, Ida Nursupiamin Nursupiamin, Nursupiamin Nurwahyuni Pathuddin Paulus Hengky Abram Pulukadang, Sri H. V. Purnama Ningsih Rabasia Rahmawat, Sitti Ramadani, Ersa Ratman Rina Andriana Rizza R. T. Agustina Roslina Roslina, Roslina S. Ahmar, Dewi Sangkota, Vivi Dia A. Sarmilah Sarmilah Sely Artasasta Lawongo Siti Aminah Siti Hajar Siti Nuryanti Sitti Rahmawati Sri Hastuti Virgianti Sri Hastuti Virgianti Pulukadang Sri Mulyani Sabang Sri Poedjiastoeti Suciati, Indah Suherman Suherman Suherman Suherman, Suherman Sukmawati Sukmawati Suyono Suyono Tahril Tiro, Frelyana Tri Putri Tri Santoso Tri Santoso Tri Santoso Unggul Wahyono Vivi Dia Afrianti Sangkota Vivi Diah Sangkota Wahda Nur Alisa Wahyuni H. Mailili Wildana Wildana, Wildana WM Diah, Anang Yuli Nurmayanti Zulhan, Zulhan