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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
Description of Science Literacy Epistemic Knowledge Ability of Chemistry Education Students on the Material of Colligative Properties of Solutions Ulwan, Rahmad; Enawaty, Eny; Muharini, Rini; Hairida, Hairida; Lestari, Ira
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.v12i6.14230

Abstract

The ability of science literacy epistemic knowledge is a fundamental thing that must be owned by students in facing the global era to be able to meet the needs of life in various situations. Epistemic knowledge can be said to be a more advanced level of knowledge because epistemic knowledge is closely related to the process of knowledge construction. This study aims to determine the science literacy skills of chemistry education students on the material of colligative properties of solutions. The research method used was a descriptive quantitative method. The study used a sample of 25 samples of 6th semester and 4th semester students using purposive samples. Data collection techniques in this study through measurement techniques and direct communication techniques. The research instrument used in this research is a science literacy test that has been modified and adapted to the material of the colligative properties of the solution. The validation used in this study used construct validity and was validated by judgment experts in material and literacy with valid final results. The results of the research on the ability of epistemic knowledge of science literacy of chemistry education students FKIP Untan shown based on the test of science literacy skills with epistemic knowledge of science literacy on indicators explaining the process of scientific phenomena with an average percentage of 75% with sufficient category. Explaining observations of scientific phenomena with an average percentage of 74% with a sufficient category. Concluding scientific phenomena with an average percentage of 69% with a sufficient category. The overall total average of students' science literacy skills is 73.33% with a sufficient category.
Profile and Characteristics of Analgesic Use in Myalgia Cases at Soromandi Health Center Rahmatillah, Rahmatillah
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.v12i6.13866

Abstract

Myalgia is a common muscle pain condition that often requires pharmacological analgesic therapy for pain management. This study aims to determine the profile and characteristics of analgesic use in myalgia patients at Puskesmas Soromandi. Data were obtained through a retrospective study of patient medical records from January to December 2023, using consecutive sampling method. The data were analyzed descriptively and presented in tables and percentages. The results show that the most common demographic groups using analgesics for myalgia were patients aged 46-65 years (46.53%), female (57.4%), and farmers (48.5%). The most frequently used analgesic was ibuprofen 400 mg (40.59%), which was more often combined with supplements rather than used as monotherapy. The most common duration for analgesic administration was 5 days (56.43%). Conclusion: Myalgia patients are generally aged 46-65 years, with a predominance of females and farmers. Ibuprofen and a 5-day duration of analgesic treatment are the most frequently applied approaches in myalgia cases at Puskesmas Soromandi.
The Synthesis of Methyl Ester Nitrate from Ketapang Seed Oil (Terminalia catappa L.) Nurliana, Laily; Ritonga, Halimahtussaddiyah; Feronika, Yulita; Musta, Rustam
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.v12i6.13537

Abstract

The synthesis of methyl ester nitrate (MEN) from ketapang oil (Terminalia catappa L.) have been carried out. This study aims to determine the yield and the characteristics of MEN. In this study, ketapang seed oil was obtained from the soxhlet extraction process followed by an evaporation process to separate the oil from the solvent. MEN can be produced from ketapang seed oil by esterification to convert all of FFA became ester, followed by transesterification that intended to produce ester from triglycerides and nitrationthat is reaction of esther and HNO3 to create MEN. Evaporated oil is esterified using methanol with a mole ratio of oil: methanol (1: 6), then the transesterification process using methanol with a mole ratio (1:15) gives a yield of 86%. The transesterification product was then nitrated using HNO3 and H2SO4 for 4 hours with a yield of 83%. Characterization of methyl ester using GC-MS characterization showed the presence of methyl palmitoleate (C17H32O2), methyl palmitate (C19H34O2), methyl oleate (C19H36O2), methyl 13-octadecanoic (C19H36O2), methyl stearate (C19H38O2), and methyl 18-nonadecanoic (C21H42O2). Characterization MEN using a FTIR spectrophotometer showed the presence of a C-ONO2 group at wave number 1550 cm-1, NO2 group at wave number 1365 cm-1 and a C-N group at wave number 1118 cm-1. It shows that MEN can be synthesized from ketapang seed oil.
Antioxidant Activity Analysis of Ethanol Extract from Melandean Leaves (Bridelia micrantha) Using the DPPH Assay Bayani, Faizul; Rahayu, Lale Budi Hutami; Rahayu, Supiani; Huaida, Nurul; Yuliana, Depi; Hulyadi, Hulyadi; Gargazi, Gargazi
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.v12i6.13855

Abstract

The increasing global prevalence of oxidative stress-related diseases such as cardiovascular disease, diabetes, and neurodegenerative disorders underscores the importance of developing effective antioxidant strategies. In this study, samples of ethanol extract from Bridelia micrantha (Melandean) leaves were used which were then evaluated using the DPPH (2,2-diphenyl-1-picrylhydrazyl) test, a method that is widely known for assessing free radical scavenging activity. The ethanol extract sample was obtained through maceration with a yield of 15.84%. Based on the DPPH test, it shows that the extract has dose-dependent inhibition of DPPH radicals, with a maximum inhibition of 66.13% at a concentration of 25 ppm. The IC50 value, calculated from regression analysis, confirmed the antioxidant potential of the extract, although it was less effective than that of vitamin C, which was used as a positive control. These findings suggest that Bridelia micrantha leaves, rich in phytochemicals such as flavonoids, tannins, and saponins, have the potential as a source of natural antioxidants for managing oxidative stress-related health conditions.
Development of Student Activity Sheets (SAS) to Practice Each Creativity Characteristics on Redox Reaction with Project Based Learning (PjBL) Model Fathimah, Aurellia Inin; 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.v12i6.13758

Abstract

This study aims to determine the feasibility of a Project Based Learning (PjBL) based student activity sheet (SAS) as a learning media on redox reaction material. The feasibility of this SAS is reviewed based on validity, practicality, and effectiveness. The research method used is the research and development model. The product trial design used a one-group pretest posttest. This research was conducted with a total of 29 student in class XI. The research instruments used in this study were SAS validation sheet, student response questionnaire sheet, student activity observation sheet, learning implementation observation sheet, creativity test question sheet, and learning outcome test question sheet. The SAS developed was declared: (1) feasible because it gets a mode score of 4, (2) practical because it gets the results of the student response questionnaire of 97.6%, the results of the observation of student activity and the observation of learning implementation which gets a mode score of 5, (3) effective for training student' creativity because it gets a p-value of 0.000 from the results of the paired sample t-test which shows that the posttest value is higher than the pretest value and there is a significant difference between the pretest and posttest values. The effectiveness of the developed SAS is also supported by the results of the learning outcomes test which get a p-value of 0.000 from the paired sample t-test results which also show that the posttest value is higher than the pretest value and there is a significant difference between the pretest and posttest values. For this reason, PjBL-based SAS on redox reaction material is suitable for use as a learning medium.
Preliminary Study on the Potential of Red Fruit Pigment (Pandanus conoideus) from West Papua as Dye-Sensitized Solar Cell (DSSC) Stepanus, Jamius Bin; Patiran, Abdul Zaid; Sumarna, Sabir; Islam, Muh. Fajar
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.v12i6.13441

Abstract

The red fruit (Pandanus conoideus) is an endemic plant from Papua, known for its distinctive color and shape. This fruit is recognized for its bioactive properties, such as antioxidant, anti-inflammatory, and antihyperglycemic effects. Its high pigment content is believed to have potential as a sensitizer in DSSC applications. However, research on this topic remains underexplored. Therefore, the aim of this preliminary study is to investigate the potential of red fruit pigments for DSSC. The characterization of red fruit pigments was conducted through phytochemical screening, FTIR and UV-Vis spectral analysis, as well as literature reviews. Pigment extraction was carried out using maceration without involving drying or grinding processes. Phytochemical screening results revealed that the macerate contains flavonoids, alkaloids, phenolics and terpenoids, compounds commonly used as natural pigments in DSSCs. FTIR analysis showed the presence of functional groups such as carboxyl (-COOH), carbonyl (C=O), and hydroxyl (-OH), which can act as effective anchoring groups when interacting with nanosemiconductor surfaces. Meanwhile, UV-Vis analysis showed absorption peaks in the UV region (wavelength 204–399 nm) and the visible region (wavelength 400–550 nm). Based on literature studies and research findings, it can be concluded that the pigments in red fruit have potential applications as DSSC sensitizers.
Evaluating Glycerol's Performance as a Sustainable Dehydrator in Ethanol Purification Muhali, Muhali; Hulyadi, Hulyadi; Bayani, Faizul
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.v12i6.14417

Abstract

This research aims to evaluate the effectiveness of glycerol as a dehydrator in the process of purifying ethanol solutions. This study is a quantitative descriptive research aimed at analyzing the effectiveness of glycerol, derived from used cooking oil, as a water dehydrating agent in the ethanol purification process. Data obtained will be quantitative and statistically analyzed to evaluate glycerol's performance as a dehydrator. The research was conducted at the Chemistry Laboratory of Mandalika Education University (UNDIKMA) over a specific period according to the research schedule.Independent Variable is glycerol from used cooking oil as a dehydrating agent. The concentration of glycerol used is determined based on the percentage of glycerol in the ethanol solution. Dependent variable the effectiveness of ethanol purification, measured through the comparison of density and percentage of standard bioethanol and Controlled variables is Temperature and pressure during the dehydration process, duration of the purification process, and the initial ethanol concentration before purification. Data analysis uses a simple regression curve that follows Lambert Beer's law. In conclusion, the results obtained (increasing the ethanol concentration to 90.5%) show that glycerol is a very effective dehydrator in reducing water content, especially for solutions with high water content such as ethanol at an initial concentration of 23.3%.
Ethnoscience Learning Ideas Oriented to Outcome Base Education (OBE) to Foster Entrepreneurial Competency Khery, Yusran; Hakim, Aliefman; Rokhmat, Joni; Sukarso, AA
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.v12i6.14241

Abstract

This study recommends OBE-oriented ethnoscience learning to foster entrepreneurial competence carried out with 6 stages of learning namely ethnoscience observation activities. ethnoscience analysis, product ideas, production trials, production cost analysis and product presentation/presentation. This learning model is further introduced by the author as ethnoedusciencepreneurship. This learning step is relevant to the main outputs/outcomes of science learning, namely Content Knowledge (HBS1): Inquiry Skills and Scientific Processes (HBS2): Laboratory Engineering and Safety (HBS3): Science Communication (HBS4): Critical Thinking and Problem Solving (HBS5): Scientific Literacy and Ethical Considerations (HBS6): Lifelong Learning and Scientific Investigation (HBS7). The learning step can accommodate the needs of developing entrepreneurial competencies in students referring to SKKNI Number 53 of 2014 concerning Industrial Entrepreneurship.
Identify the Saccharin Content in Iced Tea Sold in Jl. Sapta Marga, Sapta Marga Village, Mataram City Wahyuningsih, Sri; Azwaruddin, Azwaruddin; Abdullah, Taufik
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.v12i6.13510

Abstract

Saccharin is an artificial sweetener made from sodium salt, sodium saccharin with the chemical formula C7H5NO3S from saccharin acid which is in the form of white crystalline powder, easily soluble in water, odorless and very sweet. Saccharin has a sweetness level of 300-600 times that of natural sweeteners. This artificial sweetener also has a maximum limit for its use, namely according to Bpom No. 11. In 2019, it is 954 mg/l. The aim of the research is to determine whether there is a saccharin compound present or not and to find out how much saccharin is contained in iced tea drinks circulating on the Sapta Marga road in the Mataram City area.Sampling uses predeterminet criteria. This type of research is descriptive qualitative. The analysis in this research was carried out in 2 types, namely qualitative analysis using the resorcinol color test method and quantitative analysis using the Uv-Vis spectrophotometry method. The results of qualitative identification using the color test method carried out on 5 samples of iced tea drinks did not produce positive samples so that all samples were not continued to the quantitative test stage.
Needs Analysis of the Development of TPACK (Technological Pedagogical Content Knowledge) Integrated Green Chemistry e-Module Prototype Yulis, Putriade Rahma; Fauziah, Nurul
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.v12i6.13879

Abstract

The current condition is still limited in integrated chemistry teaching materials with TPACK(TechnologicalPedagogicalContentKnowledge)especially in Green Chemistry material because this material is a new material in the realm of the merdeka curriculum in 10th Grade of E Phase in Senior High School. Teachers only use printed books as teaching materials or additional materials made in the form of PPTs and modules from the Ministry of Education.This is one of the causes of several problems in learning. This research is the initial stage as the basis for the development of an integrated green chemistry e-module with TPACK. The development model used is ADDIE which consists of five stages, namely Analysis, Design, Development, Implementation and Evaluation.This research is limited to the needs analysis stage which includes the analysis of Learning Outcomes (CP) of E Phase, and analysis of topics on chemistry materials, analysis of problems and needs of teachers and problems and needs of students. The data collection instrument uses interviews and questionnaires. The subjects of this study consisted of 12 chemistry teachers and 84 students from Riau and Kepulauan Riau Province. The results of this preliminary analysis research include an analysis of the subject matter of 10th Grade class while there are 5 material topics and based on the questionnaire the needs of these topics include the topics with the highest percentage to be developed into e-modules because they are considered difficult by most respondents. Then the results were also obtained that there are still some shortcomings in the teaching materials used today, so that 94% of students and 100% of teachers stated that they need the development of TPACK-based teaching materials.

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