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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
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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.
Cytotoxic Potensial and Molecular Docking of Essential Oil Piper Aduncum Flowers Against Cervical Cancer Cells Rahmadani, Indah; Efdi, Mai; Suryati, Suryati
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.v12i4.12479

Abstract

Piper aduncum L., commonly known as spiked pepper, is a medicinal plant traditionally used to treat various diseases due to its diverse, active compounds. This article investigates the chemical composition, cytotoxic bioactivity in vitro and the silico of the essential oil (EO) from the flowers of Piper aduncum collected in Padang City, Indonesia. The EO was obtained by hydrodistillation using a Clevenger-type apparatus and characterized by gas chromatography-mass spectrometry (GC-MS). The in vitro cytotoxicity of the EO was assessed against cervical cancer (HeLa cancer cell line) using the MTT assay and further explored through molecular docking approaches. The main constituent of the essential oil from the flowers was dillapiol (31.68%). The LC50 and IC50 values were 31.3471 µg/mL and 65.83 µg/mL, respectively. Computational screening was performed to observe the interactions between active compounds and proteins AKT and ERK2 using molecular docking. AKT and ERK2 act as critical regulators in the PI3K/Akt and ERK/MEK signaling pathways and are potential drug targets for cancer therapy. The compounds used complied with ADMET analysis and toxicity profile. However, it is noteworthy that there have been no previous reports on the essential oil from Piper aduncum flowers from Padang City specifically targeting cervical cancer, which molecular docking studies have complemented. The results suggest that the essential oil from the flowers of Piper aduncum can be further studied as a potential lead in drug discovery for cervical cancer.
Exploration of Natural Dye Plants in Kumpang Ilong Village, Belitang Hulu District, Sekadau Regency Listiani, Etma; Masriani, Masriani; Erlina, Erlina
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.v12i5.12916

Abstract

The people of Kumpang Ilong Village, Belitang Hulu District, Sekadau Regency have used plants as natural dyes for daily needs, such as dyes for woven fabrics, food, and beverages. The use of natural dyes from local plants can be an environmentally friendly alternative compared to synthetic dyes which can cause various problems such as environmental pollution, toxicity, and the risk of allergies to humans. This study aims to identify the types, parts, and ways of using plants as natural dyes by the community of Kumpang Ilong village, Belitang Hulu District, Sekadau Regency. This study is a descriptive research to describe the use of plants used as natural dyes by the people of Kumpang Ilong Village using a data collection method that is carried out in a triangulation manner with interview, observation, and documentation techniques. The determination of 24 informants was carried out by purposive sampling technique in order to obtain detailed information.  Information was obtained by direct observation using semi-structured interview techniques. The results of the study showed that there were 20 types of natural dye plants used by the people of Kumpang Ilong village, Belitang Hulu District, Sekadau Regency.
Colorimetric Sensor of Hg(II) Ion from AgNPs-MO Quantified Using DIC with ED Equation Approach Thohir, Muhammad Bakhru; Tiyas, Windi Pangesti Kusumaning
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.v12i6.13772

Abstract

Mercury is one of the heavy metals that has high toxicity, not only for the environment but also for human health. Mercury is found in many cosmetic products; unfortunately, for people who do not understand the dangers of mercury cosmetic ingredients, their skin will become red rashes. The novelty of this article is to use colorimetric sensor for mercury combined with Digital Image Colorimetry (DIC). The image is captured with the the smartphone camera and quantified using the Euclidean Distance (ED) Equation approach. In addition, the synthesized AgNPs also use the green synthesis method with natural materials as reducing agents and stabilizers. Therefore, the purpose of this study is to determine the best synthesis conditions and determine the detection performance of mercury (II) ions. The research began with the synthesis of mercury detection substances, namely silver nanoparticles reduced and stabilized by Moringa oleifera leaf extract (AgNPs-MO). In this study, it was found that silver nanoparticles began to form at 1 hour accompanied by heating at 120°C using a hotplate, while 6 hours when without heating. The optimum pH condition is 10. This mercury detection method has good sensitivity and accuracy values, with RSD values of less than 1% for each analyte in 5 repetitions.
Absorption of Metal Ions and Dyes in Liquid Waste : A Literature Review Indah, Dahlia Rosma; Afriani, Aulia; Nurwahidah, Nurwahidah
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.v12i6.13823

Abstract

Industrial development and population growth cause a lot of waste to enter water bodies, causing pollution. A number of studies have been carried out to remove metal ions and dyes in waters. Adsorption is the most widely used method to absorb heavy metal ions and harmful dyes by utilizing natural resources that are still abundant, for example, agricultural, livestock, and fishery waste. Adsorption can also use activated or modified absorbent materials to increase porosity and expand the surface plane. In this review, the adsorption method and results obtained by the researcher with various absorbent materials are summarized which are mostly carried out in the last ten years. The purpose of this review is to provide input in finding alternatives to other absorbent materials or eliminating pollutants harmful to human health and the environment.
Development of Student Activity Sheets (LAPD) Oriented to Project Based Learning (PjBL) to Improve Chemical Literacy Skills on Redox Material Suryawan, Karina Ristya; Mitarlis, Mitarlis
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.v12i6.13183

Abstract

In the era of 21st century skills, the literacy scores of Indonesian students according to the results of the PISA study (2022) are still relatively low. The existence of learning loss after the covid-19 pandemic has had an impact on reducing learning outcomes and students' chemical literacy skills on redox material. This research aims to produce LAPD oriented to project based learning to improve chemical literacy skills on redox material. The method used is Research and Development (R&D) with a 4D model (define, design, develop, disseminate), but is limited to the develop stage. In this research, a limited trial was conducted on 29 students in 11th Grde Science 2 class, at a private school in Mojokerto, who had received redox material. Data analysis was carried out descriptively quantitatively. The validity (content and construct) of LAPD is valid, obtaining a mode of 4 with a good category. The practicality of LAPD is practical, the results of the student response questionnaire obtained a percentage of 96.78% with a very good category. The effectiveness of LAPD iseffective, the n-gain of the chemical literacy test with a high category of 93.10% and a medium category of 6.90%; and the results of the paired sample t-test obtained a Sig.2-tailed value of 0.000 < 0.05 so that H0 is rejected and H1 is accepted. Thus, it can be concluded that LAPD oriented to project based learning to improve chemical literacy skills on redox material, worthy of use
Validity of Salt Hydrolysis E-Module Based on PBL with Teaching at the Right Level Approach Parhusip, Efriani Br; Iryani, Iryani
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.v12i5.13147

Abstract

The Independent Curriculum is an innovation introduced by the Ministry of Education, Indonesia, under regulation No. 56/M/2022. This curriculum concentrates on the core subjects while giving special attention to character development and flexible learning that is adjusted to meet the requirements of individual pupils. One of the chemistry topics in the Independent Phase F Curriculum is salt hydrolysis. The purpose was to determine the level of validation of the PBL-based salt hydrolysis e-module using the TaRL approach. This research employs the Plomp model as part of the educational design research (EDR) framework, encompassing the stages of preliminary research, prototyping, and evaluation, but is limited to Prototype III. This study used five validators to evaluate the module based on language, presentation, content, graphics, and media components using a validation questionnaire.  The results obtained from this study are PBL-based salt hydrolysis e-modules with a valid TaRL approach, with a validation value of the content component of 0.92, presentation of 0.91, language of 0.97, graphics of 0.95, and media average of 0.90.
Application of Jigsaw Type Cooperative Learning Model to Improve Conceptual Knowledge and Problem Solving Ability of Senior High School Students Shofa, Nada; Supriadi, Supriadi; Aldoko, Wisnu
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.v12i6.13930

Abstract

This study proves that the Jigsaw type cooperative learning model can improve the conceptual knowledge of students on thermochemistry material, which is a learning model that has an influence on improving students' conceptual knowledge of thermochemistry. It aims to improve students' conceptual knowledge and problem solving ability through the application of the Jigsaw type cooperative learning model, taking into account the students' basic mathematics ability level which is classified into three categories: low, medium, and high. This research used quasi-experiment method with pretest-posttest control group factorial design. The subjects of the study were students of class XI IPA at SMA Negeri 06 Bombana, Bombana Region. Data were obtained through conceptual knowledge test, problem solving ability test, and student response questionnaire. The results showed that the conceptual knowledge of students who followed the Jigsaw type cooperative learning model was quantitatively higher than that of students who followed the conventional learning model. The results showed that the conceptual knowledge of students who followed Jigsaw cooperative learning was quantitatively higher than that of students who followed conventional learning. The same applies to problem solving ability, where students with the Jigsaw model showed quantitatively higher results compared to conventional learning students. the increase in conceptual knowledge was greater in the Jigsaw group compared to conventional learning. The level of students' basic mathematics ability did not affect the increase in conceptual knowledge, but did affect the increase in problem solving ability. Students gave positive responses to the Jigsaw type cooperative learning model, stating that this model was fun, easy to follow, and increased learning motivation.
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%.
Rasch Model Analysis to Develop Assessment Instruments for Student's Science Process Skills on Chemical Bonding Material Oktavianti, Femi; Aini, Faizah Qurrata
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.v12i6.13941

Abstract

The assessment of student's science process skills (SPS) on chemical bonding material in schools does not yet meet the learning outcomes of the Merdeka curriculum, because the instruments used by teachers are more focused on knowledge aspects. The purpose of this research is to develop an assessment instrument for science process skills in the topic of chemical bonding. The type of this research is Research and Development (R&D) using the Rasch model modified by Liu. This research produced 18 questions tailored to the number of learning objectives in the chemical bonding material and the indicators of scientific process skills in the Merdeka curriculum, which consist of 1) observing, 2) questioning and predicting, 3) planning and conducting investigations. 4) processing, analyzing data and information, 5) evaluating and reflecting, and 6) communicating results. The logical validity test was conducted by 5 validators consisting of 3 chemistry lecturers from FMIPA UNP and 2 chemistry teachers from State Senior High School (SMAN) 1 Banuhampu. The raw validation data were analyzed using Minifaced software, which showed that the data were valid according to the model. The raw trial data on 60 students from SMAN 1 Banuhampu were analyzed using Ministep, showing that all questions met the criteria of being valid, reliable, and having good difficulty and discrimination indices according to Rasch. These results indicate that the developed instrument is effective in measuring students' SPS on chemical bonding material and can be used to support learning based on a scientific approach.

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