cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
jkk.hydrogen@gmail.com
Phone
-
Journal Mail Official
jkk.hydrogen@gmail.com
Editorial Address
Jln. Pemuda No. 59A Mataram
Location
Kota mataram,
Nusa tenggara barat
INDONESIA
Hydrogen: Jurnal Kependidikan Kimia
Published by Universitas Pendidikan Mandalika
ISSN : 23386487     EISSN : 26563061     DOI : Prefix 10.33394
Core Subject : Science, Education,
Chemistry Education
Hydrogen: The Chemistry Education Journal published by the Chemistry Education Study Program which contains articles raised from the results of conceptual research and studies in chemistry and chemistry education including education and learning, device development, media and learning models.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 618 Documents
 48   49   50   51   52 
Analysis Antioxidant of Fractions Cocoa Beans (Theobroma Cacao L.) as Potential Herbal Medicine Wibawa, Agung Ari Chandra; Pramitha, Dewa Ayu Ika; Sanjiwani, Ni Made Sukma; Adrianta, Ketut Agus
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12548

Abstract

The cocoa seeds of the Gumbrih-Bali region are a natural commodity with great potential for development or processing by local communities. The purpose of this research is to provide information about the antioxidant potential contained in cocoa seeds. Testing the antioxidant capacity in this study uses the Uv-Vis spectrophotometry method at 517 nm wavelengths. Free radical scavanger is measured with control absorption and samples was analyzed with regression curve. The research results proved that the antioxidant (AAI) in the n-butanol fraction show result very strong ability of 4.64 compared to the 0.42 ethyl acetate fraction and 0.46 n-hexane fraction. These results prove that the potential chemical content of cocoa seeds is high in polar solvents (n-butanol fractions) such as flavonoid compounds. Furthermore, this research will be used as a basis for developing natural herbal ingredients such as cocoa which can be consumed in the community to prevent degenerative diseases.
Transforming the Chemistry Education Curriculum: Students’ Creativity Using AI in Lectures Farwati, Ratna; Sari, Indah; Fadhilah, Geby Ayu
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12569

Abstract

This Research examines of The Usage of Artificial Intelligence (AI) such as ChatGPT and alike of that by Chemistry Education students in the learning process, and provides recommendations for the transformation of the chemistry education curriculum. The results of a survey of 76 students from universities in Palembang and Serang show that ChatGPT and similar AI have become important tools in supporting academic activities, especially in understanding chemistry concepts, compiling reports, and conducting research. However, students face several problems, including the cost of use, lack of knowledge about AI, limited access, and operational difficulties. Therefore, this study recommends the integration of AI into lecture materials, the provision of comprehensive training, increasing access and technical support, and periodic evaluation and adjustment of the curriculum.
Determination of Tannin Content in Matoa Plants (Pometia pinnata) Based on Variations in Leaf Age Ulandari, Uci; Masriani, Masriani; Sasri, Risya; Ersando, Ersando
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12583

Abstract

The growth of the textile industry contributes significantly to environmental pollution from dye waste. The use of natural dyes from plants could be a solution to this problem, although they have weaknesses such as easy fading and less stable colors. Therefore, to improve color stability, a mordant is needed as a color fixative. Biomordants are mordants derived from plants that can be used as substitutes for metal mordants to bind dye to fabric fibers. Matoa leaves are one of the plants with the potential to be used as a biomordant because they contain tannin compounds. This study aims to determine the tannin content of methanol extracts of matoa leaf with various leaf age variations that can be used as a biomordant. The old and young matoa leaves were macerated with methanol for 3 days. The tannin content was determined using the Folin Ciocalteu method using a spectrophotometer Ultra Violet (UV) dual beam with positive control of tannic acid at a wavelength of 755.8 nm. The yield of methanol extract from old matoa leaves was 5.42% and from young matoa leaves was 8.58%. Phytochemical screening of methanol extract of old and young matoa leaves revealed the presence of secondary metabolite content of tannins, phenolics, flavonoids, saponins, triterpenoids, and alkaloids. The total tannin content of methanol extract from old matoa leaves was 0.37% ± 0.03, lower than that of young matoa leaves, which was 0.44% ± 0.06. Based on this research, it can be concluded that matoa leaves contain tannins and have the potential to be used as a biomordant.
Science Teachers' Perceptions The Merdeka Curriculum Implementation In Entikong Border State Junior High Schools Kusudaryani, Praditya Adi; Hairida, Hairida; Masriani, Masriani
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12585

Abstract

Merdeka Curriculum emphasises the implementation of differentiated learning and considers the unique characteristics of each student. Teachers have an important role in the development and implementation of this curriculum, and must have interpretations in accordance with the provisions of curriculum development. Teachers' perceptions of the Merdeka Curriculum are very diverse and can significantly affect the readiness and quality of learning to be carried out. This study aims to determine teacher perceptions based on aspects of cognition, affection, conation. This research uses a qualitative descriptive method with data collection techniques using questionnaires, in-depth interviews, and documentation. The research questionnaire used is an open question that has been validated for content by 3 Merdeka Curriculum experts and validated for items by Merdeka Curriculum experts and Educational Psychology Experts. The results showed that teachers' perceptions are very important in implementing the Merdeka Curriculum, cognition about general concepts is positive, but for in-depth concepts, teachers' perceptions are negative. Schools that provide gradual training have succeeded in building teachers' positive cognition, although many still think that teaching modules are the same as lesson plans from the 2013 Curriculum. Teachers support the development of Merdeka Curriculum even though they feel there are limitations in understanding and readiness of infrastructure in schools. Teachers are also positive about the support and cooperation between teachers, especially through MGMP, but still feel that they are not fully capable of making their own learning tools. Although the teaching modules are in accordance with the provisions, teachers have not fully implemented differentiation plans or utilised the results of learning style diagnosis in learning.
The Effect of Predict, Observe, And Explain (POE) Learning Model on Self Efficacy and Student Learning Outcomes on Basic Chemical Law Material Wahyuni, Tutik Sri; Rakhmawati, Alfiana Eka; Irawati, Ratna Kartika
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12588

Abstract

The purpose of this study was to describe the effect of POE (Predict, Observe, and Explain) learning model on: 1) self efficacy, 2) student learning outcomes, and 3) self efficacy and student learning outcomes on basic laws of chemistry. This study used a quantitative approach with an experimental design of the quasi-experiment type, and with a non-equivalent control group design. The population in this study were class X students of SMAN 1 Ngunut, while the samples were class X-E as the experimental class and class X-F as the control class with the sampling technique was purposive sampling. The research instrument in the form of a questionnaire was used to measure student self-efficacy and test questions were used to measure student learning outcomes. Data analysis used prerequisite tests (normality test and homogeneity test), and hypothesis tests use independent sample t-test and manova test. The results showed that: 1) there is an effect of the POE learning model on self-efficacy with a sig value. (2-tailed) 0.000 <0.05, 2) there is an effect of the POE learning model on student learning outcomes with a sig value. (2-tailed) 0.000 <0.05, and 3) there is an effect of the POE learning model on self efficacy and student learning outcomes on the material of basic laws of chemistry with a sig value. (2-tailed) 0.000 <0.05.
Development of Student Worksheets based Assessment for Learning on Chemical Equilibrium to Improve Student Science Process Skills Utami, Dianita Fitri; Agustini, Rudiana
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12617

Abstract

This study focuses on creating Student Worksheets (LKPD) that incorporate Assessment for Learning principles to improve students' scientific process skills in chemical equilibrium. The research employs the ADDIE (Analysis, Design, Development, Implementation, Evaluation) model of Research and Development (R&D). The study evaluates the LKPD's effectiveness, practicality, and validity. A one-sample t-test comparing pretest and posttest scores measures effectiveness. Practicality is determined through quantitative descriptive analysis of student feedback questionnaires and activity observation sheets. Validity assessment involves both qualitative and quantitative descriptive analysis using Likert scale validation forms. Results show that the developed LKPD achieved the highest possible validity score (mode of 5) across all aspects. It demonstrated 90.7% practicality and a statistically significant t-test result (p-value of 0.000). These outcomes suggest that the LKPD effectively enhances students' scientific process skills in chemical equilibrium studies. The Assessment for Learning approach and integrated feedback in the LKPD promote active student engagement and foster improved scientific process skills in this subject area.
Antioxidant Activity of Hydnophytum formicarum Extract by TEAC method (Trolox Equivalent Antioxidant Capacity Assay) Purnamasari, Mayshah
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12624

Abstract

Oxidative stress, caused by excess reactive oxygen species (ROS), is believed to be a major contributor to aging and various degenerative diseases. Plant-based antioxidants have gained significant attention for their potential in combating R.O.S. Hydnophytum formicarum, traditionally used to treat diabetes, is evaluated as a natural antioxidant source. This study is the first to assess the antioxidant activity of H. formicarum tuber ethanol extract using the TEAC method, revealing a high antioxidant capacity (220.38 ± 0.61 M TE/100 g), highlighting its potential as a dietary supplement.
Designing POGIL Based Student Worksheets for Buffer Solution Learning at SMAN 2 Sawahlunto Wanti, Sri; Mawarnis, Elvy Rahmi; Herman, Mimi
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12696

Abstract

The purpose of this study was to produce a valid and practical Process Oriented Guided Inquiry Learning (POGIL)-based Student Worksheet (LKPD) on 11th Grade Class Buffer Solution Material at State Senior High School (SMAN) 2 Sawahlunto. This research uses the Research and Development research method with the 4-D development model (define, design, develop, and disseminate). However, the stages in research with this 4-D model are only carried out from the first to the third stage, namely the define stage aims to get an overview of field conditions, the design stage aims to compile and design POGIL-based Student Worksheets (LKPD) on buffer solution material, and the develop stage aims to continue the POGIL-based LKPD on buffer solution material that has been designed with validity and practicality tests. The research instruments used were validation sheets and response questionnaire sheets. The validation sheet was filled by 2 lecturers and 1 chemistry educator. The response questionnaire sheet was filled by 25 of 11th grade students and 2 chemistry educators of SMAN 2 Sawahlunto. The results showed that 1) POGIL-based LKPD on buffer solution material meets the valid criteria with 85.42% validation results. 2) POGIL-based LKPD on buffer solution material has met the practical criteria with educator practicality response questionnaire results of 92.31% and student response questionnaire results of 82.15%.
Developing Quran-Integrated E-Modules on Salt Hydrolysis: A Learning Cycle 8E Approach for 11th Grade of Senior High School Students Rizki, Gibrina; Mawarnis, Elvy Rahmi; Herman, Mimi
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.12697

Abstract

The low learning outcomes of students are caused by limited teaching materials and educators who tend to use the lecture method during learning. This research aims to develop an E-Modules Based on Learning Cycle 8E Integrated with Al-Quran verses on Salt Hydrolysis Material for 11th Grade of Senior High School (SMA/MA) that are valid and practical. This research uses the Research and Development research type with the 4-D development model (define, design, develop, and disseminate). lkpHowever, only the first three stages of the model were implemented in this research. The results showed that 1) e-modules based on Learning Cycle 8E integrated with Al-Quran verses on salt hydrolysis material 11th Grade SMA / MA met the criteria very valid with a percentage of the validity of e-modules based on Learning Cycle 8E is 89%, the validity of content feasibility on integration with Al-Qur'an verses obtained a percentage of 90.6%. 2) e-modules based on Learning Cycle 8E integrated with Al- Quran verses on salt hydrolysis material for 11th Grade SMA/MA have met the criteria of being very practical with the results of the student response questionnaire obtaining a percentage of 84% and educators obtaining a percentage of 93%.
Ethnochemistry: Analysis the Relevance of Elements Periodic System in the Making of Kawali Bugis Bone as a Learning Chemistry Source Yusaerah, Nur; Imranah, Imranah; Sartika, Sartika; Fajrah, Nur
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12811

Abstract

Kawali is one of the war tools of the Bugis Bone community which in its manufacture involves the process of forging, carving, chiseling, and the use of artistic symbols which are used as cultural heritage. Given the importance of knowledge about the benefits of chemistry in life, knowledge about the chemical elements contained in the kawali cultural heritage is needed as an effort to foster learning awareness that is integrated with local wisdom values. This research was carried out to reveal the fundamental chemical activities contained in the kawali making process starting from the forging and folding process, blade formation, ornament formation and electroplating which can be used as a source of learning chemistry by paying attention to the chemical concept involving chemical elements in the kawali making process. This research adopts a qualitative descriptive approach with ethnographic methods, involving observation, interviews, and documentation. The data analysis process is carried out inductively using source triangulation, so that key, primary, and supporting informants are selected for each aspect that is the focus of the study. The results of the research show that the fundamental activities in the process of making kawali Bugis Bone include heating and expansion, metal extrusion, metal reduction and electroplating with chemical concepts including metal elements, electron configuration, metal properties, corrosion, redox reactions, and metal alloys, as well as chemical elements involved in the manufacturing process, namely iron, steel containing carbon, manganese, silicon, aluminum, nickel, chromium, cobalt, molybdenum and vanadium.

Page 50 of 62 | Total Record : 618

 48   49   50   51   52 

Filter by Year

2013 2025


Reset
Filter By Issues
All Issue Vol. 13 No. 5 (2025): October 2025 Vol. 13 No. 4 (2025): August 2025 Vol. 13 No. 3 (2025): June 2025 Vol. 13 No. 2 (2025): April 2025 Vol. 13 No. 1 (2025): February 2025 Vol 13, No 1 (2025): February 2025 Vol 12, No 6 (2024): December 2024 Vol. 12 No. 6 (2024): December 2024 Vol 12, No 5 (2024): October 2024 Vol. 12 No. 5 (2024): October 2024 Vol. 12 No. 4 (2024): August 2024 Vol 12, No 4 (2024): August 2024 Vol 12, No 3 (2024): June-July 2024 Vol. 12 No. 3 (2024): June-July 2024 Vol 12, No 2 (2024): April-May 2024 Vol. 12 No. 2 (2024): April-May 2024 Vol 12, No 1 (2024): February 2024 Vol. 12 No. 1 (2024): February 2024 Vol. 11 No. 6 (2023): December 2023 Vol 11, No 6 (2023): December 2023 Vol 11, No 5 (2023): October 2023 Vol 11, No 4 (2023): August 2023 Vol 11, No 3 (2023): June 2023 Vol 11, No 2 (2023): April 2023 Vol 11, No 1 (2023): February 2023 Vol 10, No 2 (2022): Hydrogen: Jurnal Kependidikan Kimia Vol 10, No 1 (2022): Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 1 (2021): Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 2 (2020): Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 1 (2020): Hydrogen: Jurnal Kependidikan Kimia Vol 7, No 2 (2019): Hydrogen: Jurnal Kependidikan Kimia Vol 7, No 1 (2019): Hydrogen: Jurnal Kependidikan Kimia Vol 6, No 2 (2018): Hydrogen: Jurnal Kependidikan Kimia Vol 6, No 1 (2018): Hydrogen: Jurnal Kependidikan Kimia Vol 5, No 2 (2017): Hydrogen: Jurnal Kependidikan Kimia Vol 5, No 1 (2017): Hydrogen: Jurnal Kependidikan Kimia Vol 4, No 2 (2016): Hydrogen: Jurnal Kependidikan Kimia Vol 4, No 1 (2016): Hydrogen: Jurnal Kependidikan Kimia Vol 3, No 2 (2015): Hydrogen: Jurnal Kependidikan Kimia Vol 3, No 1 (2015): Hydrogen: Jurnal Kependidikan Kimia Vol 2, No 2 (2014): Hydrogen: Jurnal Kependidikan Kimia Vol 2, No 1 (2014): Hydrogen: Jurnal Kependidikan Kimia Vol 1, No 2 (2013): Hydrogen: Jurnal Kependidikan Kimia Vol 1, No 1 (2013): Hydrogen: Jurnal Kependidikan Kimia More Issue