Journal of Tropical Chemistry Research and Education
JTCRE (Journal of Tropical Chemistry Research and Education) p-ISSN: 2685-144X; e-ISSN: 2685-5690 is a journal of chemistry education published by Chemistry Education Department, Faculty of Tarbiyah and Education, UIN Sunan Kalijaga, posted twice a year on April and October. This journal provides readers current research and developments, both chemistry and chemistry education related to tropical chemistry, through articles and research reports. All articles will be reviewed (double-blind) by experts before accepted for publication. Each author is responsible for the content of published articles. This journal encompasses original research article and review articles related to tropical chemistry, but it is not restricted to, including: Lab-based research Teaching & Learning Material Learning Learning Media/Multimedia Evaluation & Assessment Higher Order Thinking Skills Science, Technology, Engineering, and Mathematics (STEM) Education Chemical Content Learning Strategy School Laboratory Experiment Ethnoscience
Chemistry Education Department, Faculty of Tarbiyah and Education, UIN Sunan Kalijaga
Analysis of Creative Thinking Skills of Senior High School Phase E Students through Mind Maps on The Subject of The Nature of Chemistry
The main problem in this study is that no analysis has been conducted on the level of creative thinking ability of students, especially in public high schools in the city of Padang, causing teachers to lack accurate data on the effectiveness of the learning efforts that have been implemented. This study aims to analyze the level of creative thinking ability of students in the subject of the nature of chemistry, which is examined in four aspects, namely fluency, flexibility, originality, and elaboration. This study uses a descriptive method with a quantitative approach involving 40 students in phase E of SMAN Padang. Primary data was obtained from mind maps created by students and then analyzed using instruments. The results of the study were reviewed from each aspect, with the highest achievement obtained in the aspect of fluency with a percentage of 79.37%. Furthermore, the flexibility aspect obtained a percentage of 75.00%, which indicates the students' ability to categorize concepts appropriately and diversely. The originality aspect was recorded with an achievement of 60.55%. Conversely, elaboration was the aspect with the lowest achievement, at only 26.66%, indicating that students still had difficulty elaborating ideas in detail and connecting concepts between hierarchies or within a single hierarchy. It can be concluded that the majority of students were in the less creative category, namely 29 students. Meanwhile, there were 10 students in the creative category, 1 student in the not creative category, and no students in the very creative category. Keywords: creative thinking; Essence of Chemistry; Mind Maps; Students in Phase E
Efektivitas, berpikir kreatif, larutan penyangga, Treffinger, Creative Exercise
Copyright (c) 2025 Journal of Tropical Chemistry Research and Education
Improvement of Pre-Service Chemistry Teacher Skills in Designing Learning Materials through Curriculum Study to Realize Quality Education
Pendidikan memegang peranan sentral dalam mengembangkan sumber daya manusia yang unggul dan berdaya saing, salah satu caranya adalah dengan meningkatkan kualitas calon pendidik yang akan berperan langsung dalam proses pembelajaran. Untuk mencapai SDGs 4: Pendidikan Bermutu, dibutuhkan pendidik yang memiliki keterampilan merancang perangkat pembelajaran yang memenuhi standar nasional dan kebutuhan peserta didik yang dapat dilakukan melalui pendekatan studi kurikulum. Penelitian ini bertujuan untuk meningkatkan keterampilan siswa calon guru dalam merancang perangkat pembelajaran Program Semester (Prosem), Alur Sasaran Pembelajaran (ATP), dan Modul Ajar sebagai bentuk implementasi SDGs 4: Pendidikan Bermutu melalui studi kurikulum. Metode penelitian yang digunakan adalah metode deskriptif kuantitatif dengan pendekatan studi kasus. Subjek penelitian adalah 25 mahasiswa semester empat Program Studi Pendidikan Kimia Universitas Negeri Semarang. Pengumpulan data dilakukan melalui lembar penilaian sejawat dan angket tanggapan. Hasil penelitian menunjukkan adanya peningkatan keterampilan siswa calon guru dalam merancang perangkat pembelajaran sebelum dan sesudah studi kurikulum sebesar 32% untuk program semester, 28% untuk ATP, dan 21% untuk modul terbuka. Persentase tanggapan siswa mengenai persepsi mereka terhadap kurikulum pembelajaran adalah 82,63%, yang dikategorikan sangat baik. Studi ini menyimpulkan bahwa pembelajaran yang efektif dalam meningkatkan keterampilan calon guru dalam merancang perangkat pembelajaran, sehingga mewujudkan pendidikan yang berkualitas (SDGs 4). Kata Kunci: Studi Kurikulum, Perangkat Pembelajaran, Pendidikan Berkualitas
The Role of Motivation and Perceived Response Quality in GPT Usage for Chemistry Learning at University
The utilization of artificial intelligence in learning is growing, one of which is through the use of a Generative Pre-trained Transformer (GPT) as a learning tool. This study aims to analyze the relationship between student motivation, response quality perspective, and frequency of GPT use in chemistry learning. This study uses a quantitative approach with multiple regression methods to predict the frequency of GPT use based on two predictor variables, namely motivation and response quality evaluation. Data were collected through a survey of 58 students from chemistry and chemistry education study programs at the undergraduate, master's, and doctoral levels. Correlation analysis results showed a significant positive relationship between motivation and response quality evaluation (r(56) = .59, p < .001) and between response quality evaluation and frequency of GPT use (r(56) = .49, p < .001). However, the relationship between motivation and frequency of GPT use was weaker (r(56) = .32, p = .015). Regression analysis showed that evaluation of response quality significantly predicted the frequency of GPT use (β = .57, p < .001), whereas motivation had a smaller effect (β = .21, p < .01). The R² value of .25 indicated that 25% of the variability in the frequency of GPT use could be explained by both predictor variables. This finding suggests that although motivation has a role in the use of GPT, college students are more likely to use it when they rate the response quality as high. The implications of the results of this study can be the basis for developing strategies to increase the utilization of GPT in chemistry learning as well as academic policies related to the use of AI in education.
Pedagogical Content Knowledge in Chemistry Education: Its Significance for Pre-Service Chemistry Teachers
This study examines the significance of Pedagogical Content Knowledge (PCK) in chemistry education, specifically its role in pre-service chemistry teacher training. Through a comprehensive review of 14 articles, the research identifies key themes related to the development, application, and impact of PCK on chemistry teaching practices. The majority of the articles emphasize the importance of integrating PCK into teacher training programs, highlighting the effectiveness of practice-based and constructivist learning approaches to bridge the gap between content knowledge and teaching strategies. PCK was found to influence teaching methodologies, allowing teachers to tailor their approaches to specific chemistry topics and manage classroom dynamics effectively. However, the study also reveals significant gaps in the application of PCK in classroom management and assessment practices, areas that require further exploration. The findings suggest that although PCK plays a critical role in improving teaching quality, its integration into classroom management and assessment is still underexplored. The research recommends future studies to focus on these areas, particularly in secondary and higher education settings, to refine the application of PCK across various aspects of chemistry teaching. This research contributes to a deeper understanding of PCK's role in teacher preparation and offers directions for future research to enhance the development of pre-service chemistry teachers and improve overall teaching effectiveness.
Development of A Basic Chemistry E-Book Enhanced with Multiple Representations and STEM Activities
Chemistry concepts are generally abstract so they require teaching materials that visualize those abstract concepts. The aims of this study were to develop a Basic Chemistry E-Book enhance with multiple representations and STEM approach. This study used a research and development model modified from the ADDIE model which consists of 5 stages, namely: (1) Analysis (analysis of students’ characteristics and course objectives), (2) Design (design of e-book and research instruments), (3) Develop (e-book production), (4) Implementation (expert judgement and field trials), and (5) Evaluation (the effectiveness test and revision of e-book). Research result showed that the feasibility of e-book based on the expert judgement got 93.75% as a score on the material feasibility component, 100% as a score of feasibility component and 95.40% as a score of the language and STEM component. Furthermore, the results of small-scale field trials obtained a percentage of 86% and large-scale field trials obtained a percentage of 87%. The effectiveness test of e-book got score 0,643 means e-book was effective enough for using in learning chemistry. Based on this study, e-book for Basic Chemistry Course based on multiple representations with the STEM approach is appropriate for being used in general chemistry course.
basic chemistry, multiple representation, STEM approach
Micro-Scale Approach in Organic Chemistry Learning as an Innovative Strategy to Support Sustainable Development Goals (SDGS)
The micro-scale approach in organic chemistry learning offers an innovative solution to enhance the effectiveness of the teaching and learning process while supporting the Sustainable Development Goals (SDGs). This study aims to describe the implementation of the micro-scale approach in the curriculum of an organic chemistry course at a higher education institution. This approach emphasizes the use of small quantities of chemicals, simple laboratory equipment, and eco-friendly techniques to minimize laboratory waste, operational costs, and negative environmental impacts. The research method involves qualitative analysis to evaluate the effectiveness of this approach in terms of learning outcomes and its relevance to the SDGs, particularly those related to quality education. The results reveal that the micro-scale approach has not yet been implemented in organic chemistry learning. However, organic chemistry lecturers and students have a general understanding of the concept of the micro-scale approach. Moreover, both lecturers and students recognize that the micro-scale concept aligns with the objectives of sustainable development. This study concludes that the micro-scale approach is an innovative and effective strategy to support sustainability-oriented organic chemistry learning. The implementation of this approach is expected to serve as a replicable learning model across various educational institutions, contributing to broader SDGs achievements
The Implications Philosophy of Science on Metabolism Education and Kidney Failure Prevention
The philosophy of science serves as a framework for understanding and teaching scientific knowledge, including metabolism, to promote health and prevent chronic diseases such as kidney failure. This study aimed to explore students' perspectives on kidney failure among young adults and the implications of the philosophy of science in metabolism education. A qualitative case study approach was employed, involving six science education students in East Java. Data were collected through in-depth interviews and analyzed thematically. The findings reveal that students have positive experiences with metabolism education, enhancing their understanding of metabolic processes and their role in kidney health. The program also encourages lifestyle changes, such as increased healthy food consumption and physical activity. However, challenges such as limited access, academic stress, and inadequate facilities persist. Students demonstrate a high awareness of kidney failure, although some perceive their risk as low. This study highlights the importance of inclusive, community-based education approaches and the use of digital technology to amplify its impact.
Standardization of Telang Flower Extract for Bioactive Compound Assessment using Solvent Variations
Telang flowers are found in many tropical areas, one of whuch is in Indonesia. The content of telang flowers can be used as anticancer, anti-inflammatory and antimicrobial. The amount of healt potential contained in telang flowers is important to do standardization. This study aims to determine the standardisation of telang flower extract in maceration method with 96% etanhol, ethyl acetate and n-hexane solvents. Standardisation testing includes specific and non-specific parametes. The results showed that the telang flowers used was included in the Clitoria ternatea species. Weight yield, drying shrinkage, specific gravity, moisture content and ash content have met the standard. The largest yield weight is found in ethanol solvent which is 11.83%. The highest secondary metabolite content was found in ethanol solvent, namely alkaloids, flavonoids, tanins, and saponin. While in n-hexane solvent there were only terpenoids and steroids.
Using Item Option Characteristics Curve (IOCC) to Unfold Misconception on Chemical Reaction
Misconceptions can significantly hinder the learning process. To address this, various diagnostic instruments such as two-tier (2TMC), three-tier, and four-tier multiple-choice questions have been introduced. However, as the number of tiers increases, identifying misconceptions becomes more complex. Therefore, this study employs the Item Option Characteristics Curve (IOCC) to identify misconceptions by calculating the probability of each option being selected. The Representational Systems and Chemical Reactions Diagnostic Instrument (RSCRDI) was administered to 185 pre-service teachers across three universities in Indonesia. The data was analyzed using Winstep software to generate the IOCC for each item. The analysis revealed that each item in the phenomenon and reasoning tiers contains distractors that could interfere with the option selected by pre-service chemistry teachers. While the alternative answers identified using traditional methods (commonly used since the introduction of 2TMC) were mostly similar to those identified by IOCC, the IOCC provided more detailed insights. Specifically, it highlighted unexpected curves after 0 logits, identified less effective distractors, and revealed inconsistencies in the most influential distractors. These findings suggest that the IOCC provides richer, more detailed information and can be a valuable alternative framework for analyzing 2TMC items to unfold misconceptions.
Copyright (c) 2024 Journal of Tropical Chemistry Research and Education
Evaluation of Introductory Environmental Chemistry Course for Prospective Chemistry Teachers Using Context, Input and Process Models
This study aims to evaluate the learning programme of the Introduction to Environmental Chemistry course of the Chemistry Education study programme in one of the public universities in Bandung City. This study needs to be evaluated and improved because there are still aspects that are not in accordance with 21st century learning as evidenced by document analysis and learning observations. The method used is a qualitative approach and the CIPP (Context, input, process, Product) evaluation model as a tool to evaluate and improve the lecture programme which focuses on the Context aspect in the form of document analysis of the Semester Learning Plan (SLP), the Input aspect in the form of lecturer interviews and the Process aspect in the form of learning observations. The results obtained from the analysis show that there are several findings that need to be evaluated due to the incompatibility of aspects in the SLP document update such as administrative completeness, the General Skills Aspect (GSA) 1 listed is not in accordance with the Context of Learning Outcomes (CLOs), based on interviews with teaching lecturers it is stated that problem-based learning (PBL) with the context of validated environmental issues in relevant theoretical content and in the aspect of the learning observation process it was found that there were aspects of learning practices that were not in accordance with the SLP document reference. The evaluation also highlighted the importance of updating and adjusting learning media to be more interactive and relevant to the context of environmental issues. The assessment of the last three years shows the potential to further develop programmes can to improve students' higher order thinking skills
Context, Input and Process Evaluation, CIPP Model, Learning Methods, Environmental Chemistry Course Programme
The Ethnoscience Study on Eucalyptus Oil Distillation in Buru Island as a Source for Learning Chemistry
Chemistry is a branch of science closely related to daily life. Ethnoscience cannot be separated from science, especially in the study of chemistry. The tradition of distilling eucalyptus oil (Melaleuca cajuputi) on Buru Island has been carried out traditionally for generations. This research aims to analyze and reconstruct the indigenous knowledge of the community in the eucalyptus oil distillation process into scientific knowledge that can be used as a source for learning chemistry. This research used a qualitative approach based on ethnoscience with interview, observation, and documentation methods. Data analysis employs the Miles-Huberman model, which consists of data reduction, data presentation, conclusion drawing, and verification. The results of the research showed that the eucalyptus oil distillation process can be explored in science materials or concepts related to separation techniques, differences in density, phase changes, and substance pressure. The ethnoscience study results indicated the potential of ethnoscience to be applied in chemistry education.
Academic Capability Under the Lens: Analyzing the Comprehensive Exam Program
This program evaluation is intended to describe the results of the comprehensive examination program for prospective teachers in all science fields. The results of this program evaluation are expected to make a specific contribution to the sustainability of the comprehensive examination program being held and are expected to contribute to education in general. This program evaluation uses the CIPP (Context, Input, Process and Product) evaluation model. Data sources for this program evaluation consist of documents and human resources. Based on the results of a thorough evaluation of the comprehensive examination program, it can be concluded that recommendations to improve the effectiveness and sustainability of this program are very important. Evaluations covering context, input, process and product aspects show that there are several areas that need to be improved and improved. An effective and sustainable comprehensive examination program is not only an evaluation tool, but also an integral part of their academic and professional career development. With a holistic and sustainable approach, study programs can ensure that comprehensive exams provide maximum benefits for students and educational institutions as a whole.
Boosting Engineering Capabilities through Science Learning
This research aims to review increasing engineering capabilities through science learning using the case study method. The primary focus of the research is to understand how the integration of science concepts in the engineering curriculum can improve students' technical and analytical skills. The case study was conducted at a vocational high school that applies an interdisciplinary approach between science and engineering. Data was collected through classroom observations, interviews, and questionnaires. The research results show that students who are involved in science learning integrated with engineering can demonstrate an understanding of engineering concepts, problem-solving abilities, and critical thinking skills. In addition, teaching methods that focus on scientific projects and experiments have proven effective in building students' interest and motivation towards the field of engineering. This research concludes that science learning applied in an integrative manner can be an effective strategy in improving students' engineering capabilities
Development of a Mental Model Diagnostic Test using Predict, Observe, Explain (TDM-POE) on Voltaic Cell Materials
Understanding chemical concepts as a whole show that students can connect three levels of chemical representation. The three levels in chemical representation are related and reflected in students' mental models. A teacher must know the student's mental model as a reflection of learning. This research aims to develop an instrument for students' mental models on voltaic cell submaterials using the prediction-observation-explanation (TDM-POE) mental model diagnostic test. The method used in this research is the research and development method using the Analysis, Design, Develop, Implement, and Evaluate (ADDIE) development model. The instrument was validated by five validators consisting of four lecturers in the Department of Chemistry Education and one chemistry teacher at school. Validity is determined by content validity response. Then, the instrument was tested on class XII students who had received learning about voltaic cells. The instrument consists of four questions for four concepts: voltaic cell construction, calculating standard cell potential values, voltaic cells in alkaline batteries, and corrosion phenomena. Each question consists of 3 stages, namely, the first stage contains questions about predicting phenomena (predict), the second stage contains video or image observations (observe), and the third stage contains detailed explanations (explanation). The validation results show that the validity of the TDM-POE instrument obtained a score of 0.99, which is categorized as valid. So, the TDM-POE instrument can be used to understand chemical concepts.
The Potential of Materials Constructing Traditional Houses of Honai Dani Tribe of Papua as A Source for Learning Biochemistry with an Ethnoscience Approach
This research aims to explore the biochemical aspects of the local wisdom of the Honai traditional house Dani tribe of Papua and its potential integration in biochemistry learning through an ethnoscience approach. The research method is literature study from scientific journal articles, books, online articles, and research reports related to the biochemical composition of the building materials that make up the Honai traditional house. The main problem in this study is how to construct indigenous science knowledge into scientific science and identify its potential integration in biochemistry learning. The study showed that the main components of Honai houses are reeds, various types of wood, and rattan. The biochemical composition is lignin, holocellulose, alpha-cellulose and hemicellulose as well as other compositions that can be discussed on the topic of biochemical aspects of living things and further on the topic of cells and cell bonds / chemical bonds. The material composition contained in the materials that make up the honai traditional house can also be further explored in the practice of applied biochemistry, to produce other appropriate items. Thus the Honai traditional house is highly potential as a learning resource in biochemistry courses with an ethnoscience approach.
Ethnoscience Studies in Traditional Food of North Maluku "Papeda" and Its Implementation of Chemical Concepts in Science Learning
Ethnoscience is a science learning approach that implements local wisdom (regional culture) using certain cultural products. Local wisdom can be in food and drink, traditional ceremonies, dances, games, and traditional languages. One of the traditional food-based local wisdom is Papeda. Papeda is a traditional food made from sago flour. The purpose of this research is to reconstruct the original science of the community into scientific science and to review the concept of chemistry in science learning in the process of making papeda. The research method used is descriptive qualitative research through interviews and literature studies. The results of this study indicate that the reconstruction of indigenous knowledge into scientific science from the local wisdom of traditional food typical of North Maluku, namely Papeda, can be used as a learning resource for students because it has relevance to various chemical concepts in science learning. Chemical concepts contained in the process of making papeda are substances and their changes, colloids, physical and chemical changes, thermochemistry, macromolecules (especially carbohydrates), and food and nutrients with their relationship to the digestive system.
Ethnoscience Study of Reed Plants (Imperata Cylindrica (L.)) in the Ume Kbubu of the Timor Tribe
The alang-alang plant is believed to be a good thermal insulation, but unfortunately, it is starting to be abandoned. The purpose of this study was to investigate the use of reed plants (Imperata cylindrica (L.)) as a basic material in the manufacture of ume kbubu of the Timorese tribe. This research was conducted in the South Middle Timor District, East Nusa Tenggara Province. The method used in this research is the triangulation method, which analyzes primary data in the form of observation data, interview data, and literature studies. The results showed that alang-alang (Imperata cylindrica (L.)) is used by Timorese people as an ume kbubu roof due to several factors such as its abundant availability, cheap, strong, durable, and cheap. Through scientific studies, it can be explained that alang-alang (Imperata cylindrica (L.)) has a strong structure, contains high lignin and cellulose, is hydrophobic, and has anti-microbial and antioxidant properties that can help protect plants from pests and diseases. In addition, the influence of the shape of the roof construction using alang-alang which has a hollow structure makes the ume kbubu roof a good thermal insulator. The study of community science and scientific science on using reeds (Imperata cylindrica (L.)) as a basic material for making ume kbubu of the Timorese tribe can be integrated into science learning in schools and universities.
Ethno-Science Study of Bamboo as A Building Material of Baduy Community for Environmentally Friendly and Sustainable Materials Chemistry Learning
This study aims to develop the chemical aspects of the local practice of the Baduy community in utilizing bamboo as a traditional house building material that can be integrated in material chemistry learning. The research method is a literature study of scientific journals, books, online articles, and research reports related to bamboo as a building material, which is then analyzed by comparing local knowledge and scientific concepts to identify potential integration into science learning, especially chemistry. The result of this study is that the integration of natural science with local practices, such as bamboo used for environmentally friendly and sustainable building materials, is an innovative way to teach materials chemistry. The study of bamboo as a building material can help students understand chemistry concepts, especially the structure and physicochemical properties of materials so that students can relate the mechanical and thermal characteristics of materials to their structure in a more relevant and practical way. Thus, chemistry learning is not only limited to theory and laboratory experiments, but also includes real applications that are relevant to everyday life in society.
Evaluation of Biochemistry Learning Based on OBE and KKNI in The Face of The World Of Work in Society 5.0
This field study research was conducted to analyze Biochemistry lectures from the perspective of the Indonesian National Qualifications Framework (KKNI) and Outcome-Based Education (OBE) based university curriculum. Data collection techniques were carried out through observation of learning implementation in Biochemistry courses, interviews with lecturers teaching Biochemistry courses, and analysis of semester lecture plan (RPS) documents. The participants involved in this study were three lecturers and 83 students of the undergraduate study program of ipa education in one of the universities in Jember Regency. The Biochemistry course is in the upper level compulsory course group with the study of science concepts. From the KKNI perspective, this course needs to increase the Bloom level in the CPMK provided to match the profile of science study program graduates. From an OBE perspective, this course has a contribution to graduate learning outcomes in Specific Skills and supports the profile of graduates as Science Teachers.
Ethnoscience Study: Chemistry Aspects of the Local Practice of Mango (Mangifera Indica L.) Fruit Ripening with Carbide for Contextualized Chemistry Learning
This study aims to explore the chemistry aspects of local practices on Mango (Mangifera indica L.) fruit ripening process with calcium carbide to be integrated in contextual chemistry learning. Literature studies from scientific journals related to natural and artificial fruit ripening were comparatively analyzed in relation to local knowledge and scientific concepts to identify potential integration into science learning (especially chemistry). The results showed that the integration of natural science with local practices, such as fruit ripening, is an innovative way to teach chemical kinetics in a contextualized way. The study of the fruit ripening process can help students understand chemical concepts, especially chemical kinetics, in a more relevant and practical context. Thus, chemistry learning is not only limited to theory and laboratory experiments, but also includes real applications that are relevant to the lives of students and society.
Sundanese Perceptions and Preferences Towards Lalaban Menu: an Ethnoscience Study in Learning
Lalapan, a typical Sundanese side dish, has cultural significance and high nutritional value for its people. The purpose of the study was to gain insight into how Sundanese people perceive and like the lalaban menu, the traditional menu in their culture as well as their preferences in terms of taste and presentation. This study, reveals the meaning and cultural values inherent in the lalaban menu in Sundanese culture, as well as identifying specific elements of the lalaban menu by scientific principles. This study will also analyze the needs of students in science learning in junior high schools and use these findings as a basis for designing ethnoscience-based learning models that incorporate Sundanese local wisdom around the lalaban menu. This research is expected to help improve understanding of the meaning and value of Balaban culture in Sundanese culture. The research method is an explorative survey with observation techniques through the dissemination of questionnaires with an ethnoscientific approach. Data were collected through observation of 350 participants from 10 cities/districts. The data obtained were analyzed descriptively. The results showed that Balaban was already known to the public, lalapan has a taboo that people believe as a myth. However, there is a scientific explanation from the perspective of ethnoscience, fresh vegetables are important and consumed not just for cultural heritage but there are benefits that can be obtained, types of fruits, vegetables, or plants that are used as potential fresh vegetables that can be consumed, nutritional studies of fresh vegetables, characteristics or inventory of plants used as fresh vegetables, have symbolic meaning as balance, simplicity, and closeness to nature. Other perceptions of tehadap fresh vegetables according to surveys that have been conducted variously. Preference for fresh vegetables is influenced by taste, texture, and nutritional value. In conclusion, the perception and preference of lalaban are not only based on taste and texture but also influenced by cultural significance and nutritional value.
ethnoscience, fresh vegetables, Sundanese people, nutrition
The Effect of Chemo-Entrepreneurship-Based Chemistry Learning Integrated with Values Education on Eleventh-Grade Students’ Learning Outcomes and Motivation
Chemistry learning innovations must be continuously pursued to prepare students for Era Society 5.0 and overcome academic and non-academic problems, including juvenile delinquency. One of the chemistry learning innovations carried out by this study is the application of chemo-entrepreneurship-based chemistry learning integrated with Values Education (VE). This study aimed to offer evidence for developing student learning outcomes and motivation through integrating values education into chemo-entrepreneurship-based chemistry learning. A quasi-experimental study was conducted to determine the effect of chemo-entrepreneurship-based chemistry learning integrated with VE on learning outcomes (affective and cognitive domains) and the motivation of grade XI students at Senior Secondary School Ajisaka, Tulang Bawang, Lampung. The sample was selected using a saturated cluster random sampling technique to determine the control group (XI-1) and the experimental group (XI-2). Students learning outcomes on the affective domain and motivation were measured by the Mann-Whitney test while learning outcomes on the cognitive domain was measured by independent sample t-tests on pretests and posttests taken by students. The study demonstrated that students exhibited a statistically significant change in learning outcomes and motivation due to these treatments.
Development of Motion Graphic Video on Class XI Colloid Materials in Increasing Students' Interest in Learning
Colloidal material is an abstract material that causes students to have difficulty learning it. The difficulty of colloidal material causes students' interest in learning to decrease. This research aims to produce motion graphic video-based learning media on colloid system material to increase students' interest in learning. This research uses research and development (R&D) methods with a 4-D model, which consists of four stages, namely define, design, develop, and disseminate. However, this development is limited to the development stage only. The product was reviewed by the supervisor and four peer reviewers and then validated by one material expert and one chemist. The quality of the media was assessed by four reviewers (high school/MA chemistry teachers) and responded to by 10 high school/MA students. The Linkert scale is used as a product quality assessment questionnaire sheet and the Guttman scale is used as a student response questionnaire sheet. The product produced in this research is a chemistry learning video on colloid system material. The assessment results from material experts obtained an ideal percentage of 80% and were included in the good category. The results of the media expert assessment obtained an ideal percentage of 85% and were included in the very good category. The assessment results from the reviewers (four SMA/MA chemistry teachers) obtained an ideal percentage of 91.36% and were included in the very good category. The results of the responses of ten high school students obtained an ideal percentage of 95%. Based on the assessment results, it can be concluded that the motion graphic video developed can be used as an alternative learning media for colloid system material to increase interest in learning
chemistry learning media, colloid system, learning interest, motion graphic video
Analysis of Basic Laboratory Skills of Science Education Students Using Pictorial-Based Instruments
Laboratory skills are an important aspect of natural sciences in schools and higher education, often linked to psychomotor aspects of learning. Several studies have developed several methods that can be used to evaluate laboratory skills, for example, the use of observation sheets equipped with rubrics. However, often using this method requires a longer learning time. Therefore, there is a need for research that examines how to evaluate students' basic laboratory skills. This research aims to analyze students' basic laboratory skills using pictorial-based instruments. This research method uses descriptive qualitative. This instrument is equipped with pictures that provide visualization. The basic laboratory skills are focused on experiments on making standard solutions from solids, making standard solutions from concentrated solutions, and acid-base titrations. Based on the analysis, it was found that the basic laboratory skills of science students in the experiment of making standard solutions from solids contained six basic skills, including selecting tools, weighing solids, transferring solids into a beaker, putting them in a volumetric flask, marking the solution, reading the meniscus mark. In the experiment of making a standard solution, there are five basic skills, namely selecting tools, taking the stock solution, transferring it into a volumetric flask, marking the solution, and reading the meniscus mark. The titration experiment consists of 8 skills, including selecting equipment, taking the analyte solution, taking the titrant solution, adding a titration indicator, using the titration technique, observing the endpoint of the titration, reading the meniscus, and calculating the solution's concentration.
Copyright (c) 2023 Journal of Tropical Chemistry Research and Education
Culinary in Islamic-Javanese Cultural Heritage from a Chemistry Perspective
Food plays a significant role in the religious rituals of Java, specifically within the realm of Islam, where special foods are prepared and consumed during religious ceremonies and celebrations, imbuing spiritual practices with a unique cultural essence. Understanding the chemistry behind these foods is essential for comprehending their health benefits and their embodiment of noble values within Javanese and Islamic cultures. This article seeks to delve into the chemistry of various cultural heritage foods from an Islamic-Javanese standpoint. To achieve this, a thorough literature review was conducted, focusing on culinary practices embedded within the Islamic-Javanese cultural heritage and exploring the corresponding chemical explanations. The research employed a systematic and meticulous search across academic databases, online libraries, and search engines to gather a broad range of perspectives, theories, and empirical evidence. Food, as a reflection of culture, serves both practical and symbolic roles within a particular cultural community. It serves as a manifestation of the values, traditions, and identity of the cultural group, while also meeting the physiological needs of individuals by providing essential nutrients and energy. Beyond mere sustenance, food holds utilitarian value by ensuring survival and promoting overall well-being. By delving into the chemistry of these cultural heritage foods, this article aims to shed light on their significance within the Islamic-Javanese context, uncovering the intricate interplay between chemistry, culture, and spirituality.
Pengembangan Buku Teks bermuatan Higher Order Thinking Skills (HOTS) pada materi Gugus Fungsi
Penelitian ini bertujuan untuk pengembangan buku teks bermuatan Higher Order Thinking Skill (HOTS) pada materi gugus fungsi. Model pengembangan dalam penelitian ini menggunakan model pengembangan ADDIE yang terdiri dari tahap analyze, design, development, implementation, dan evaluation. Penilaian produk dilakukan oleh satu ahli materi, satu ahli media, empat guru kimia SMA/MA dan direspon oleh sepuluh siswa. Instrumen penelitian berupa lembar validasi ahli, lembar penilaian kualitas produk dan lembar respon siswa. Produk berupa buku teks bermuatan HOTS pada materi gugus fungsi. Buku teks ini memuat materi gugus fungsi sesuai kompetensi kurikulum 2013 yang dibagi ke dalam 7 subbab yaitu pengertian gugus fungsi, alkohol, eter, aldehid, keton, asam karboksilat, serta ester. Hasil penelitian menunjukan bahwa penilaian oleh ahli materi memperoleh skor rata-rata 45 dari skor maksimal 50 dengan persentase keidealan 90% sehingga termasuk dalam kategori sangat baik (SB). Hasil validasi oleh ahli media memperoleh skor 30 dari skor maksimal 30 dengan persentase keidealan 100% dan termasuk dalam sangat baik (SB). Hasil penilaian dari empat guru kimia SMA/MA memperoleh skor rata-rata 69,5 dari skor maksimal ideal 80 dengan persentase keidealannya 86,86% dan termasuk kategori sangat baik (SB). Buku ini juga direspon positif oleh siswa dengan persentase sebesar 98%.
Penelitian pengembangan, buku teks, Higher Order Thinking Skill (HOTS), gugus fungsi
Pengembangan Buku Pengayaan berbasis Kontekstual pada Materi Pencemaran Air sebagai Alternatif Sumber Belajar Mandiri
Penelitian pengembangan ini bertujuan untuk mengembangkan buku pengayaan berbasis kontekstual pada materi pencemaran air sebagai alternatif sumber belajar mandiri peserta didik SMA/MA dan mengetahui kualitas buku pengayaan yang telah dikembangkan dan mengetahui respon peserta didik terhadap buku pengayaan yang telah dikembangkan. Penelitian ini merupakan penelitian pengembangan (Research & Development) dengan model pengembangan 4D yaitu define (pendefinisian), design (perancangan), development (pengembangan), dan disseminate (penyebarluasan). Penelitian ini hanya dilakukan sampai tahap development (pengembangan). Kualitas produk dinilai oleh satu dosen ahli materi, satu dosen ahli media, empat pendidik SMA/MA dan direspon oleh sepuluh peserta didik SMA/MA kelas X. Instrumen penelitian yang digunakan yaitu lembar penilaian kualitas produk dengan skala Likert dan lembar respon peserta didik skala Guttman. Teknik analisis data dilakukan dengan mengubah data hasil penilaian dan respon yang berupa data kualitatif menjadi data kuantitatif. Kemudian dianalisis setiap aspeknya dengan pedoman kriteria kategori penilaian ideal dan presentase keidealan untuk menentukan kualitas buku pengayaan yang dikembangkan. Hasil penelitian menunjukkan bahwa buku pengayaan berbasis kontekstual pada materi pencemaran air sebagai alternatif sumber belajar peserta didik dari penilaian ahli materi mendapatkan kategori baik (B) dengan presentase keidealan 80%. Penilaian ahli media mendapatkan kategori sangat baik (SB) dengan presentase keidealan 86% dan penilaian pendidik SMA memperoleh kategori sangat baik (SB) dengan presentase keidealan 89,29% serta respon 10 peserta didik mendapatkan presentase keidealan 90,83%.
Pengembangan Modul Kimia berbasis Relating, Experiencing, Applying, Cooperating dan Transfering (REACT) bermuatan Etnokimia
Penelitian pengembangan ini bertujuan untuk mengembangkan modul kimia berbasis relating, experiencing, applying, cooperating dan transferring (REACT) bermuatan etnokimia pada materi asam basa dan mengetahui kualitas produk berdasarkan penilaian ahli materi,ahli media, guru kimia dan respon peserta didik. Penelitian ini merupakan penelitian pengembangan (Research & Development) dengan model pengembangan ADDIE yang terdiri dari 5 tahap yaitu analysis, design, development, implementation, dan evaluation. Namun penelitian ini dibatasi sampai tahap ketiga yaitu development. Penilaian kualitas produk dilakukan oleh satu ahli materi, satu ahli media, empat guru Kimia SMA/MA dan direspon oleh sepuluh peserta didik SMA/MA. Instrumen penelitian berupa lembar penilaian kualitas produk dengan skala Likert dan lembar respon siswa skala Guttman. Teknik analisis data yang digunakan yaitu dengan mengubah data kualitatif menjadi data kuantitatif. Hasil produk pengembangan berupa modul berukuran B5 berisi materi asam basa yang disusun sesuai dengan rangkaian strategi pembelajaran REACT dan dilengkapi dengan muatan etnokimia. Hasil penilaian ahli materi memperoleh persentase 91,8% dengan kategori Sangat Baik (SB), penilaian ahli media memperoleh persentase 92,63% dengan kategori Sangat Baik (SB), dan penilaian guru Kimia SMA/MA memperoleh persentase 92,5% dengan kategori Sangat Baik (SB). Sedangkan respon peserta didik terhadap produk sangat positif dengan persentase 96,7%.
Zn, Fe, Se, and I concentrations present in tomato as affected by neem extract preservation in Sokoto, Nigeria
Nowadays addition of chemicals to save tomatoes against early spoilage is rampant, but the chemicals are harmful; thus, bio-based alternative with novel features are needed. The aim of this study was to discover the effect of using neem leaves extract for preservation of two tomato cultivars collected from Sokoto, Nigeria. 5%, 10% and 25% (w/v) aqueous solutions of neem extract to be used to coat tomatoes were prepared and an experiment was done in a randomized control trial. Consequently, with the addition of neem extract for preservation of tomato; Zn, Fe, Se, and I were assessed in Daneka tomato variety using atomic absorption spectrometry. The Fe level increase from 13.0 ± 0.05 ppm to 16.1 ±0.01 ppm. Selenium increase from 2.0 ± 0.05 ppm to 5.2 ± 1.5 ppm, iodine increase from 6.2 ± 0.02 to 8.0 ± 0.02 ppm in Daneka, and zinc increase from 14.0 ± 0.5 to 18.0 ± 0.2 ppm. The ranges of the determined Fe, Se, Zn, and I micronutrients in UTC tomato variety are respectively as follows: 14.0± 0.03 to 18.0± 0.03 ppm, 3.1± 0.03 to 7.0± 0.01 ppm, 15.6± 0.04 to 18.0± 0.01 ppm, and 7.0± 0.02 to 9.1± 0.02 ppm. Therewith, the concentrations of micronutrients increase with an increase in neem extract concentrations (p < 0.05). more studies are needed to make neem extract as a cheap, safe, and accessible substance for tomato preservation.
Tomato, Daneka, UTC, Zinc, iron, selenium, malnutrition, neem
Students' Chemistry Multiple Representation Ability in Voltaic Cell Materials
Multiple representation ability is a student's understanding of describing a concept at three chemical representation levels: macroscopic, submicroscopic, and symbolic. This ability represents a complete understanding of chemistry, so every teacher needs to know. This research was conducted to analyze students' multiple representation abilities in voltaic cell material using the Predict-Observe-Explain (POE) diagnostic test. This study uses a qualitative descriptive method to obtain an overview of the ability of multiple representations naturally. The instrument uses the POE diagnostic test, has been validated by five validators consisting of lecturers and chemistry teachers and has been tested to obtain instrument legibility. The research subjects involved 34 class XII high school students who had studied voltaic cell material. The findings of the ability profile of multiple representations include (1) the concept of voltaic cell construction; most students (32.35%) are able to understand the constructs at the macroscopic and symbolic levels accompanied by explanations at the submicroscopic level that are not correct, (2) the concept of calculating values standard cell potential, as many as 44.12% of students were able to observe (macroscopic) and calculate (symbolic) the standard cell potential value accompanied by an inaccurate submicroscopic level explanation, (3) most students (32.35%) were not correct in explaining cell voltaic in alkaline batteries at the macroscopic and submicroscopic levels accompanied by writing at the appropriate symbolic level, and (4) the concept of corrosion, most students (35.29%) were able to explain corrosion phenomena at the macroscopic and symbolic levels accompanied by explanations at the submicroscopic level which less correct.
Multiple representation, POE, Voltaic cells.