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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
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.
Phytochemical Screening and In Vitro Antidiabetic Test of Ethyl Acetate Fraction of Tiger’s Betel (Piper porphyrophyllum) Hanifah, Nurul; Santoni, Adlis; Efdi, Mai
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.v12i5.13118

Abstract

Piper porphyrophyllum or known as tiger’s betel, is a medicinal plant of the Piper genus that is quite widespread in Indonesia, especially on Java, Sumatra, and Kalimantan island. Tiger’s betel is widely used traditionally to treat headaches, bone pain, chest tightness, skin diseases, relieve inflammation, and diabetes mellitus. This study aims to determine the type of secondary metabolite compounds contained in the ethyl acetate fraction of tiger’s betel and determine its antidiabetic activity. Determination of the type of compound is conducted by phytochemical screening by a qualitative test using various reagents to identify flavonoids, phenolics, saponins, triterpenoids, steroids, alkaloids, and coumarins. The antidiabetic assay was carried out by inhibiting α-glucosidase activity and the results were reported as IC50 values. The ethyl acetate fraction of tiger’s betel positively contains alkaloids, flavonoids, and phenolics. The antidiabetic activity is classified as very strong, with an IC50 value of 14.06 µg/mL.
Description of Science Teacher Readiness in Implementing Independent Curriculum at SMAN 1 Pulau Maya Agustina, Bella; Enawaty, Eny; Ifriany, Andi; Hairida, Hairida; 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.v12i5.13120

Abstract

This study aims to evaluate the readiness of science teachers at State Senior High School (SMAN) 1 Pulau Maya in implementing the Merdeka Curriculum, with a focus on understanding the curriculum and readiness in developing teaching modules. The method used is descriptive qualitative, with data collection through observation, interviews, and documentation of three science teachers (Chemistry, Biology, and Physics). The results showed that the teachers' understanding of the curriculum reached excellent scores, namely 100 for Chemistry, 100 for Biology, and 93.8 for Physics, with an average of 98. However, their readiness in preparing teaching modules was at a sufficient level, with a percentage of 55% for Chemistry, 67% for Biology, and 72% for Physics, an average of 65% thus classified as ready. In conclusion, although science teachers have understood the curriculum well, there is still a need to improve their readiness in preparing teaching modules in order to carry out the learning process optimally.
Chemistry Game Cards as an Alternative Media for Learning: A Literature Review Nadila, Nadila; Enawaty, Eny; Erlina, Erlina; Masriani, Masriani
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.v12i5.13130

Abstract

Along with many chemical game media studies in the last 5 years, therefore the purpose of this literature review is to provide the latest information regarding student perspectives on chemical game card media. The review was conducted by searching international articles from ScienceDirect, Pubmed, Mendeley Search, ERIC, ACS Publication and Springer Link databases related to articles published between January 2019 and September 2024. To ensure conclusions based on high-quality evidence with longitudinal studies with a sample of >500 articles within the last 5 years, the search resulted in 6,779 articles from 6 databases. With a total of 23 articles with student subjects and 18 articles with student subjects who expressed their opinions about chemistry games and 2 articles with review article subjects. Overall, students and university students stated that chemistry game activities are effective as an alternative fun learning media to increase student engagement, motivation and learning outcomes. However, in this review, it was found that the use of games integrated with the internet was less in secondary schools than in universities. Meanwhile, the use of chemistry games without internet integration in high school and college is relatively the same. Overall, the perspectives of students and college students showed a positive attitude towards chemistry games.
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.
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.
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.
Antidiabetic Effect of Ethanol Extract of Keji beling Leaves (Strobhilantes crispa) in Rats Induced by Streptozotocin Nuraqidah, Nuraqidah; Hasnaeni, Hasnaeni; Mirawati, Mirawati
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.v12i5.13256

Abstract

Diabetes Mellitus (DM) type 2 is a chronic disease characterized by increased glucose levels in the body due to insulin resistance or inadequate insulin production. This study aims to determine the antidiabetic potential of keji beling ( Strobhilantes crispa) leaf extract. This research is different from other studies which used Alloxan as a diabetes inducer. In this study, Streptozotocin was used as a DM inducer. After treatment, information was obtained that keji beling (S. crispa) extract could reduce blood glucose levels in type 2 DM rats. Experimental research used 30 male Wistar rats divided into six groups consisting of normal group, negative control (HFD and Streptozotocin), positive control (Glibenclamide), dose group I (150 mg/kg BW), dose II (300 mg/ kg BW), and dose III (450 mg/kg BW). Based on the research results, it is known that S.crispa leaf extract can reduce blood glucose levels in mice induced by Streptozotocin and has the potential to act as an antihyperglycemic in type 2 DM.
Ethnochemistry: Studying The Food Chemistry In The Making of Kapurung Imranah, Imranah; Yusaerah, Nur; Wana, Nur; Faradita, Udita
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.v12i5.13325

Abstract

Kapurung is a traditional food from South Sulawesi, especially from Tanah Luwu/Luwu Raya. This food is made from sago (Metroxylon sago) as the basic ingredient which is processed together with various vegetables and meat or fish. The concept of ethnochemistry is used to examine the process of making kapurung through analyzing the natural ingredients used and the chemical changes that occur during processing. The way kapurung is made reflects the local knowledge of the community in managing existing natural resources. The research was conducted to reveal the chemical aspects and fundamental chemical activities contained in the process of making kapurung.This research uses descriptive qualitative research with ethnographic methods, namely observation, interviews, and documentation. Data analysis in this study used source triangulation which was carried out inductively, so that in this study key informants, main informants and supporting informants were determined on each aspect that became the object of research.The results showed that the fundamental chemical activities contained in the kapurung making process are the gelatinization of starch in sago, protein denaturation, fiber degradation and the dissolution of nutrients in vegetables, the Maillard reaction in fried/roasted fish/chicken, and the use of food additives in the kapurung making process.
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.

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