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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 27 Documents
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Search results for , issue "Vol 12, No 6 (2024): December 2024" : 27 Documents clear
Development of Particle Board Biocomposite From Coffee Skin and Tofu Dregs With Polyethylene Plastic Adhesive As Furniture Interior Hidayat, Ali Nurdin; Permana, Edwin; Wijaya, Dhian Eka; Pratama, Yoga; Zufri, Fauzi
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.v12i6.13802

Abstract

The need for particle board interiors is still in great demand to be used as wood-sourced interiors. In line with this, currently the problem of waste is still a fairly complex problem, both organic and inorganic waste. Coffee rinds and tofu pulp are organic wastes that have not been optimally utilized. Therefore, research was conducted on the manufacture of particleboard from coffee rinds and tofu pulp with PP plastic adhesive which aims to reduce the rate of deforestation due to tree felling as raw material for interior manufacturing and to control the environment by utilizing waste in the community into functional products. This study aims to determine the best formulation of particleboard made from Polyethylene plastic, coffee bean hulls and tofu pulp. Tofu dregs need to be preserved by soaking the dregs for 48 hours in a 5% glycerol solution and 15% NaCl solution in a 50:50 ratio. Then soaked for 48 hours. soaking 15.121%. To determine a good particleboard formulation, a physical evaluation of the particleboard was carried out including particleboard density test, water absorption test, moisture content test, thickness development test and instrumentation testing using SEM to see the surface structure of the particleboard.  Based on the results of physical testing, the best formulation of particleboard biocomposites was obtained, namely the ratio of 70:30 (% w/b) (70% of tofu pulp and coffee bean skin and 30% of PET plastic) which is in accordance with SNI 03-2105-2006 standards. Biocomposite particleboard formulation 70:30 (% w/b) has a density of 0.60186 gr/cm3, water absorption of 95.395%, moisture content of 2.248% and an increase in thickness after soaking of 15.121%.
Development of Animated Video Learning Media Integrated with Quranic Verses on Molecular Shape Material for 11th Grade Student Udzri, Muhammad Taufiq; Mawarnis, Elvy Rahmi; Sari, Dwivelia Aftika
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.v12i6.13455

Abstract

This research was motivated by the limited availability of learning media used as a source of student learning which has an impact on the quality and learning process. Learning media used by educators are still simple and non-technological. Therefore, it is necessary to develop a learning media to be used as an additional learning resource for students The learning media developed consists of animated videos integrated with verses from the Quran. The purpose of this research is to produce animated videos integrated with Quranic verses on molecular form material that are valid and practical. This research uses the Research and Development research method with the 4-D model (define, design, develop, and disseminate). Based on the results of the research conducted, it was found that 1) the animated video integrated with Quranic verses met the criteria of being very valid with a percentage of content feasibility on the material of 90.17%, content feasibility on the interpretation expert obtained a percentage of 95%, presentation feasibility obtained a percentage of 93.75%, presentation feasibility on the interpretation expert obtained a percentage of 100%, linguistic feasibility obtained a percentage of 92.41%, linguistic feasibility on the interpretation expert obtained a percentage of 96.87% and feasibility of grammatical obtained a percentage of 92.50%, 2) the animated video integrated with Quranic verses on molecular shape material has met the criteria of very practical with the results of student response questionnaires on the ease of use indicator obtained a percentage of 87.10%, the interest indicator obtained a percentage of 90.17%, the usefulness indicator obtained a percentage of 89.28 and time efficiency obtained a percentage of 90.62%. The results of this study indicate that the animated video developed can be used as a learning resource for students.
Antioxidant Activity of Avocado Folium (Persea americana M.) Wusurwut, Fahriya; Hasnaeni, Hasnaeni; Waris, Risda
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.v12i6.13638

Abstract

Free radicals can be formed through normal cell metabolism events, malnutrition and as a result of responses to external influences such as pollution and ultraviolet rays. Free radicals can cause premature aging, therefore antioxidants are needed to prevent premature aging. Avocado folium (Persea americana M.) contain secondary metabolite compounds, namely alkaloids, saponins, tannins, glycosides and flavonoids in the form of quercetin, where flavonoid compounds can act as antioxidants. This study aims to determine the antioxidant activity of avocado leaf extract (P. americana M), using the (2,2-dihphenyl-1-picrylhdrazil) (DPPH)  method. The sample used in this research was avocado folium obtained from Southeast Maluku, Maluku Province). DPPH method with a UV-Vis spectrophotometer at a wavelength of 514 nm. The antioxidant activity of ethanol extract of avocado folium in this test is 112.410 µg / mL. The results of this study show that avocado folium extract has moderate antioxidant activity.
Aeration and Slow Sand Filter Technology in Drilling Well Water Treatment to Reduce TDS Levels Zulkarnaen, Muhammad Fauzi; Hatimah, Husnul
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.v12i6.13953

Abstract

The quality of borehole water is often affected by the high content of Total Dissolved Solids (TDS) which can disrupt human health and quality of life. This study examines the effectiveness of the combination of venturi aeration and slow sand filter technology in reducing TDS levels in boreholes in East Lombok, NTB. The priority is the use of venturi aeration and slow sand filtration in an integrated manner as a combined treatment for borehole water, which has not been widely explored in previous studies. This method offers a practical, cost-effective, and environmentally friendly solution to overcome high TDS levels, especially in rural areas and areas with limited resources. These findings provide a new perspective on optimizing water treatment technologies to improve community access to clean and safe water. Sampling was carried out from six different locations and initial TDS levels were measured. The borehole water was treated through venturi aeration for 1 hour to remove dissolved gases and organic compounds, followed by filtration using a slow sand filter to filter fine particles, microorganisms, and other dissolved compounds. The results showed that venturi aeration was able to reduce TDS by 6.8% to 17.9%, while the slow sand filter provided an additional reduction of 3.1% to 8.3%. The combination of these two methods resulted in a total reduction in TDS of 11.3% to 25.8%. The effectiveness of the treatment was influenced by the iron content in the air and the structure of the sand media. Data were analyzed using the ANOVA test to determine the significance of the reduction in TDS.
Development of Chemis 3D Augmented Reality Media for Discovery Learning Model in Chemical Bonding Sahrawati, Fiska; Danial, Muhammad; Salempa, Pince; Djangi, Muhammad Jasri
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.v12i6.13972

Abstract

The goal of this research and development (R&D) study was to develop a 3D Chemis media product that included cards and applications for three-dimensional display. The 4-D development model by Thiagarajan et al., which comprised the phases of defining, designing, developing, and distributing, was consulted in the creation of this 3D chemistry media. The study's findings included the following: 1) two media experts and two material experts' evaluations of the media's viability and validity fell into the extremely valid group; 2) During the limited testing phase, which involved 29 students from class X MIA 5 SMAN 16 Makassar, each student received an average learning outcome test score of 83.3 out of 100, with 86.2% of the class completing the course. Additionally, the evaluation of student motivation for this media fell into the very high category, suggesting that the media was effective; 3) both students' and teachers' responses to the developed learning media fell into the very high category, suggesting that the media was useful. Following a validation stage by experts and validators, development revisions, and a small number of trials, this learning material was found to be reliable, useful, and efficient. The Chemis 3D media model was shown to be reliable, useful, and efficient.
Development and Characterization of Bioplastics from Straw and Rice Husk for: Effect of Addition of Glycerin, CMC, and TiO2 Hardi, Gilar Wisnu; Toruan, Sari Artauli Lumban; Dewi, Berlian Kusuma; Nurjanah, Suci; Nurohmat, Nurohmat; Rifai, Bagus Muhammad Ainul; Hidayat, Ahmad
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.v12i6.13821

Abstract

The development of environmentally friendly materials is crucial to mitigate the environmental impact of conventional plastics. This study focuses on developing bioplastics using rice straw and rice husks, combined with glycerine, carboxymethyl cellulose (CMC), and titanium dioxide (TiO₂). Glycerine acts as a plasticizer to enhance flexibility, CMC functions as a matrix binder, and TiO₂ serves as a reinforcing agent to improve mechanical strength. Bioplastics were produced using the casting method with specific proportions of these materials. Characterization tests included scanning electron microscopy (SEM) for morphology, biodegradability tests, water absorption analysis, and tensile strength measurements. Results revealed that the combination of rice straw and rice husks produced bioplastics with varied morphologies. TiO₂ enhanced mechanical strength and material homogeneity, though its distribution requires further optimization. Glycerine significantly increased flexibility, while CMC improved matrix cohesion. The novelty of this research lies in the integration of agro-industrial waste—rice straw and rice husks—with TiO₂, glycerine, and CMC, creating bioplastics that balance biodegradability, mechanical properties, and flexibility. This innovative approach demonstrates the potential of utilizing agricultural byproducts to produce sustainable alternatives to conventional plastics, offering customizable properties for diverse applications.
Implementation of Nggahi Rawi Pahu Philosophy Through in Chemistry Learning Based on Social Cognitive Theory for Student Character Strengthening Annafi, Nurfidianty; Admyana, Putu Budi; Suastra, I Wayan; Sutajaya, I Made; Tika, I Nyoman; Wesnawa, I Gede Astra
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.v12i6.13492

Abstract

Social cognitive theory developed by Albert Bandura is the most influential approach to learning. This theory emphasizes that a person's behavior can be learned through observation of social models in the surrounding environment, be it teachers, parents, or peers. This theory is known as observational learning or modeling. This research aims to explore the process of observational learning in an effort to strengthen the value of the Nggahi Rawi Pahu philosophy. The research method used is descriptive qualitative.  The sample in this study were fourth semester students of the Chemistry Education Study Program. Data collection techniques were carried out by means of observation, administration of questionnaires and documentation. In this study, observational learning was carried out through 4 stages of cognition in the learning process, namely attention, retention, motor reproduction and motivation. 7 out of 10 students showed a positive response to the relevance, involvement and benefits of observational learning in an effort to strengthen the philosophy of Nggahi Rawi Pahu. This shows that through observational learning the value of the Nggahi Rawi Pahu philosophy can be improved.

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