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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 21 Documents
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Search results for , issue "Vol 12, No 5 (2024): October 2024" : 21 Documents clear
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.
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.
Feasibility of Discovery Learning Based Student Worksheets on Acid-Base Materials to Practice Critical Thinking Skills Putri, Reyna Miftahud Daroeni; Yonata, Bertha
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.v12i5.13134

Abstract

This study aims to evaluate the feasibility of using discovery learning-based student worksheets (LKPD) to foster CTS in the context of acid-base topics. The feasibility of the LKPD is assessed through three key criteria: validity, practicality, and effectiveness. The worksheets incorporate critical thinking skills (CTS) such as interpretation, evaluation, analysis, and inference, applied to understanding acid-base properties and strength. A one-group pretest-posttest design was used, involving 22 students from class XI-4 at SMAN 1 Kedamean, Gresik. Research instruments included response questionnaires, student activity observation sheets, and pretest-posttest assessments for CTS and cognitive learning outcomes. The results revealed the following: (1) Practicality was supported by student activity observations, with a higher proportion of relevant activities and 93.33% of students giving positive feedback, categorizing the LKPD as very practical. (2) The LKPD received a validity score of 4. (3) Effectiveness was demonstrated through pretest-posttest results, with 90.9% of students achieving classical completeness and an n-gain of 0.7 for critical thinking skills, rated as high. Based on these results, the discovery learning-based LKPD is considered feasible.
Utilization of Chili Citrus (Citrus microcarpa) as a Natural Fixator for Dyeing Cotton Fabrics with Dayak Onion Tuber Extract (Eluetherine palmifolia (L.) Merr) Widyasari, Ida Ayu Made Tania; Masriani, Masriani; Hairida, Hairida
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.v12i5.12917

Abstract

The high demand for the textile industry can pollute the environment through waste. Natural dyes from natural ingredients are used as a step to minimize this waste.  Dayak onions can be used as a natural dye because they produce a red color from anthocyanin compounds. However, natural dyes have weaknesses, namely that the color is less stable and fades easily, so a fixator is needed. Fixator is used to strengthen the color in fabrics that use natural dyes. Orange chili sauce has the potential to be a natural fixator because it contains citric acid. This research aims to analyze the effect of the concentration of chili pepper fixator (Citrus microcarpa) on the color fastness of cotton fabric using natural dyes from Dayak onion bulbs (Eleutherine palmifolia (L.) Merr). The research method used was an experiment using a colorimeter application whose results were in the form of ΔE values. The test was carried out on the color of the fabric that had been dyed and fixed and then the average value (ΔE) was measured before and after washing the soap. The research results showed that the average value (ΔE) of the smallest to largest fixator was a concentration of 20%, 100%, 0%, 40%, 60% and 80%. Based on the results of the Kruskal Wallis test followed by the Bonferroni test, a significant value of 0.024 (p>0.05) was obtained at a concentration of 20%. This shows that the chili lime fixator has a significant influence on the fastness of the fabric.
Comparison of Ethanol Levels in Yellow and Red Watermelon Wine Tan, Andreas Felix; Manao, Mutiara Angelina; Delviyanti, Maria Novia; Honesty, Pricillia Pretty Septy; Hapsari, Natalia Diyah
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.v12i5.11464

Abstract

Watermelon is one of the tropical fruits that has high water and sugar content. However, the selling price of watermelon is still relatively low, and there is limited processing variation. By utilizing the high water and sugar content in watermelon to create an alcoholic beverage, wine is one promising form of innovation. The aim of this research is to determine the difference in alcohol content of wine made from yellow and red watermelon. The samples used in this study were yellow and red watermelons. Yellow and red watermelons fermented with Saccharomyces cerevisiae yeast to transform them into wine. The ethanol content in wine and red watermelons was analyzed using GC-MS instruments. Subsequently, the soluble sugar content, pH, IR spectra, as well as the color, taste, and aroma of the wine also analyzed. The research results show that the average ethanol content of yellow and red watermelon wines is 7.59% and 6.61% respectively. The average soluble sugar content in yellow and red watermelon wines is 8.6% Brix and 12.64% Brix, respectively. The pH value of each wine sample is 4, and the IR spectra of each wine sample indicate the presence of stretching OH groups. In conclusion, red watermelon wine has a lower ethanol content than yellow watermelon wine.
Effectiveness of Antioxidant Compounds in Swallow's Nest from Lombok Juniawan, Alvin; Andini, Arista Suci; Wanadiatri, Halia
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.v12i5.13169

Abstract

This study investigated the antioxidant activity of swallow nests known as Edible Bird Nests (EBNs) derived from the swallow species Collocalia linchi, especially those sourced from Lombok, Indonesia with various health benefits, including their potential as antioxidants. This study used swallow nest samples taken from 3 different locations, namely: East Lombok, Central Lombok and West Lombok. The extraction method used is heating and sonication. Antioxidant activity was assessed quantitatively using the DPPH method and measured by UV-Vis spectrophotometry. Results showed varying IC50 values across different extraction times, with the highest values recorded at 3818.47 mg/mL and the lowest at 2331.47 mg/mL, compared to the control (ascorbic acid) at 35.22 mg/mL. The higher the IC50 value, the lower the effectiveness of antioxidants and vice versa. These findings suggest that the antioxidant activity of EBNs extracts is relatively weak when compared to ascorbic acid. This study contributes to the understanding of optimized extraction techniques by heating and sonication to unlock the full potential of the extraction results of bioactive compounds.
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.
Effectiveness of the Constructivist Approach (Guided Inquiry) in Chemistry Learning: A Systematic Review Pahriah, Pahriah; Adnyana, Putu Budi; Ariawan, I Putu Wisna; Wesnawa, I Gede Astra
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.v12i5.13353

Abstract

This study aims to identify the effectiveness of the Guided Inquiry approach in enhancing critical thinking skills, learning motivation, conceptual understanding, and student learning outcomes in chemistry education. Utilizing the Systematic Literature Review (SLR) method, this research reviews various relevant studies from international and national databases such as Scopus, ERIC, and SINTA, employing focused keywords. The analyzed articles were selected based on inclusion criteria that encompassed topic relevance and the availability of empirical data, resulting in 27 final articles for further analysis. The qualitative analysis results indicate that Guided Inquiry not only improves students' conceptual understanding of chemistry concepts but also strengthens critical thinking skills and learning motivation. Quantitative findings demonstrate a pattern of increased effectiveness across various educational levels, with more significant results observed at the secondary education level compared to higher education. Several factors, such as the role of teacher facilitation and student readiness, were also identified as important influences on the success of this approach. This study recommends the integration of the Guided Inquiry approach into the chemistry education curriculum, accompanied by the development of technology-based modules and continuous training for educators, to maximize the potential for constructive learning.
Utilization of Rambai Fruit Vinegar (Baccaurea motleyana) as a Natural Fixator in Cotton Fabric Dyeing with Dayak Onion Bulb Extract (Eleutherine palmifolia (L.) Merr) Tiara, Tiara; Masriani, Masriani; Hairida, Hairida
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.v12i5.12967

Abstract

The use of synthetic dyes in the textile industry has a negative impact on the environment. One solution that can overcome this impact is to switch to using natural dyes. However, natural dyes tend to produce less stable colors and fade easily. For this reason, a fixator is needed that can strengthen and maintain the natural dye in the fabric. Rambai fruit was chosen as a fixator because of the content of ascorbic acid which has the potential to be a natural fixator. This study aims to analyze the effect of the concentration of rambai fruit vinegar fixator on the dyeing of cotton fabrics with Dayak onion extract on color fastness. This research method is included in experimental research using the ΔE value as analysis data. Based on the results of the ΔE value, the concentration of 80% has the best level of color fastness. The results of the anova one-way test on the variation of the rambai fruit vinegar fixator obtained a significant result (p<0.05). This shows that there is an effect between the use of rambai fruit vinegar fixator concentration and color fading resistance using Dayak onion bulb extract. At a concentration of 80%, rambai fruit vinegar fixator is the most optimal concentration as a cotton fabric fixator with dye of Dayak onion bulb extract (Eleutherine palmifolia (L.) Merr) with a ΔE value of 3.47. Thus, rambai fruit vinegar with a high concentration can be an alternative fixator in the textile industry. This research contributes to the development of more environmentally friendly natural fixator materials in the textile industry that replace more harmful chemical fixators.
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.

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