cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
jkk.hydrogen@gmail.com
Phone
-
Journal Mail Official
jkk.hydrogen@gmail.com
Editorial Address
Jln. Pemuda No. 59A Mataram
Location
Kota mataram,
Nusa tenggara barat
INDONESIA
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 12 Documents
 1   2 
Search results for , issue "Vol 11, No 2 (2023): April 2023" : 12 Documents clear
A Characterization of Virgin Coconut Oil Obtained via Extraction Utilizing Tamarind Seed Skin Waste Muhammad Ali Ilyas; Ahmad Multazam; Alpiana Hidayatulloh; Nefi Andriana Fajri
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7409

Abstract

This study aims to provide a characterization of virgin coconut oil obtained through the acidification method, using tamarind seed skin as an oil extractor. The utilization of tamarind seeds is motivated by the fact that they are considered a waste product and are not commonly used by the community. Additionally, tamarind seeds contain organic acids, such as citric acid, tartaric acid, and malic acid, which can effectively hydrolyze the bond between oil and other substances in coconut flesh, such as proteins and carbohydrates. The characterization of virgin coconut oil includes a range of tests, such as organoleptic evaluation, density measurement, moisture content determination, free fatty acid analysis, and peroxide number determination, which are compared to coconut oil produced through heating. The virgin coconut oil is extracted from grated coconut flesh by mixing tamarind seed skin, which has been mashed, with grated coconut flesh in a 1:4 ratio. This mixture is then homogenized and incubated for approximately 10 minutes to extract the oil. The organoleptic evaluation results of the virgin coconut oil produced through acidification demonstrate a light yellow color with no detectable taste or odor, while the coconut oil produced through heating has a dark yellow color, a slightly rancid smell, and a distinct coconut oil taste. The density of the virgin coconut oil produced through acidification and heating is 0.870 g/mL and 0.868 g/mL, respectively. The moisture content of the virgin coconut oil produced through acidification and heating methods is 0.1713% and 0.1700%, respectively. The free fatty acid content for the acidification and heating methods is 0.14% and 3.252%, respectively. The peroxide number test shows that the acidification method yields a higher value of 27.41 meq O2 / kg compared to 5.694 meq O2 / kg for heating.
Development of Student Worksheet Based on Learning Cycle 5E on Stoichiometry Material Iqbal Abdan Lydra; Elvy Rahmi Mawarnis; Mimi Herman
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7349

Abstract

This study addresses the insufficiency of teaching materials in the learning process and its negative impact on students' comprehension of provided material. To alleviate this issue, student worksheets based on Learning Cycle 5E were developed to be used as a learning resource for 10th-grade students studying stoichiometry at State Senior High School (SMAN) 1 X Koto Singkarak. The aim of this research was to create a valid and practical Student worksheet based on Learning Cycle 5E. Development research with the 4-D development model (define, design, development, and disseminate) was employed, with the first three stages executed. The define stage was conducted to identify the school's conditions and problems, while the design stage was used to create the initial student worksheet based on Learning Cycle 5E for stoichiometry material. The develop stage was carried out to refine the worksheet. Data were gathered using validation sheets and practicality questionnaires filled out by two chemistry lecturers, one chemistry teacher, and 10th-grade students of SMAN 1 X Koto Singkarak. Data analysis was conducted using a quantitative descriptive method. Results indicated that the Student worksheet based on Learning Cycle 5E met the valid criteria with a validation score of 91.37% and the practical criteria with a student response questionnaire score of 82.09%. Thus, the worksheet can be used as a learning resource.
Phytochemical Screening of Ethanol Extracts from Three Variants of Kratom Leaves (Mitragyna speciosa Korth.) Masriani Masriani; Rini Muharini; Dinda Kartika Wijayanti; Purnama Melanie; Margareta Lita Widiansari
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7122

Abstract

Kratom (Mitragyna speciosa Korth.) has been traditionally used in the community for medicinal purposes. Kratom leaves have been reported to possess various biological activities such as antioxidant, antibacterial, anti-inflammatory, and antinociceptive effects. The biological activity of kratom leaves is believed to be attributed to the presence of secondary metabolites. The aim of this study was to investigate the content of secondary metabolite compounds in three types of kratom leaves, namely green, red, and white kratom. Each 200 g of kratom leaf powder was subjected to 72 hours of maceration with 1 L of 96% ethanol solvent. The resulting extract was filtered and concentrated using a water bath and an oven at a temperature of 50oC to obtain a concentrated extract. The extract was evaluated for its yield and secondary metabolite content using specific reagents for each test. The results revealed the presence of secondary metabolites such as alkaloids, flavonoids, triterpenoids, phenolics, tannins, and saponins in the red, green, and white kratom leaves. These findings provide a valuable reference for future bioactivity research and identification of the bioactive compounds present in the three variants of kratom leaves.
Development of Articulate Storyline 3-Based for Chemical Bonding Teaching Materials Dewi Lestarani; Kalista L.K. Tanone; Lolita A.M. Parera; Arvinda C. Lalang; Johnson N. Naat
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7403

Abstract

The development of Articulate Storyline 3 (AS3)-based chemistry teaching resources on chemical bonding is the aim of this research. the subject of research was 10th-grade senior high school students. This research was conducted to investigate the form of creation and viability of chemical bonding teaching materials using the AS3 application. Minor modifications are made to the Borg and Gall method for instructional design for the production of AS3-based chemical bonding teaching materials. The technique consists of five steps: preliminary studies, product design plan (planning and development), product validation (validation design and revision), field trials, and final product dissemination. The instruments used in this study were interview sheets, questionnaires in the form of instrument validation for material experts, and media experts, tests for students, and documentation. Material expert data, media, and student responses were obtained and analyzed to describe the validity and feasibility of teaching materials. The findings indicated that the optimal percentage was 96.42%, while the very excellent percentage was 96.66%. The results of the evaluation of the feasibility of teaching materials by material specialists and media specialists were 83.07% and 84.61 %, respectively, in the very excellent category. According to the findings of expert evaluations and field testing of chemical teaching materials based on AS3, this chemical bond material is very appropriate for use in educational settings.
Screening of Rhodomyrtus tomentosa (Aiton) Wight (Karamunting) Compounds that Have the Potential for Breast Cancer Samsul Hadi; Kunti Nastiti
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7189

Abstract

Breast cancer is the highest disease in the world beating lung cancer, so various alternatives are needed to find a treatment. Screening drug discovery against breast cancer by targeting BCL-2 occupies the main position and is the goal of this study. The method used is insilico. the material used is 10 compounds from R. tomentose, 2w3l protein from RCSB, PLANT docking software, the docking coordinate used is X: 39.8057 Y: 26.9355 Z: -12.4145 with a radius of 11.1871, then to find out the type of bond and residue involved using discovery studio. The results of this study were docking scores from -91.3871(5'-Desgalloylstachyurin) to -65.4754 (Afrormosin), activity predictions from PASS online from 0.174 (Rhodomyrtosone C) to 0.799 (Lupeol). Based on the docking score, three compounds that have the potential to inhibit the work of BCL-2 were obtained namely 5'-Desgalloylstachyurin, Rhodomyrtosone B and Rhodomyrtosone D.
Analyzing Misconceptions of Acid-Base Topic among Chemistry Education Students in Online Learning Settings: A Case Study Catur Fathonah Djarwo; Frans Pither Kafiar
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7147

Abstract

This study aims to identify the misconceptions of 11 third semester Chemistry Education students at Cenderawasih University in relation to online learning during the Covid-19 pandemic. Online learning poses various challenges for both students and lecturers, resulting in incomplete explanations and hindering students' understanding of the material, leading to possible misconceptions. A descriptive qualitative method was employed, utilizing diagnostic tests with a Certainty or Response Index (CRI) and interviews. The findings revealed that 41% of the students had a clear understanding of the acid-base concepts, 30% lacked understanding, and 29% had misconceptions. The students' misconceptions related to six subconcepts in acid-base materials, including acid-base theory, acid-base indicators, acid strength (pH), weak acid-base equilibrium constant (Ka/Kb), calculation of solution pH, and the concept of pH in the environment, with a range of misconceptions from 9-45%. This study highlights the need for addressing misconceptions in online learning, specifically in the acid-base topic, to ensure effective understanding and learning outcomes for students.
Enhancing Students' Science Process Skills through the Implementation of POGIL-based General Chemistry Experiment Manual: A Quantitative Study Faizah Qurrata Aini; Zonalia Fitriza; Iswendi Iswendi; Ifan Rivaldo; Mawardi Mawardi; Annisa Khairani Putri
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7498

Abstract

This study focuses on the development of a POGIL-based experiment manual for general chemistry courses to enhance students' science process skills. The research and development (R&D) method, utilizing the Plomp model, was employed to create a valid and practical manual. Data were collected through a validity and practicality questionnaire, which was then analyzed using the Kappa Cohen's method. The manual's content was found to be highly valid, with an average score of 0.82, while its graphics had an average score of 0.84, also falling within the high category. Practicality was assessed through small group student testing, revealing high practicality scores in terms of user convenience, attractiveness, and benefits, with an average score of 0.77. Overall, the results indicate that the POGIL-based general chemistry experiment manual developed in this study is both valid and practical.
Development of Android-Based Chemistry Virtual Laboratory Media on Acid-Base Materials for 11th Grade High School Students Firda Elfiana Muslim; Ivan Ashif Ardhana
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7222

Abstract

This study aimed to develop an Android-based virtual laboratory media for chemistry, assess its validity, and determine students' responses to it. The research methodology employed was research and development (R&D) with the 4D development model (Four D Models) according to Thiagarajan, which comprises four stages: define, design, develop, and disseminate. The study was carried out until the development stage. The research instruments used included interview guides, validation sheets, and questionnaires. The media products developed were validated by material and media expert validators consisting of two chemistry lecturers and one chemistry teacher. Limited trials were conducted with a total of 32 11th grade students from Mathematics and Science (MIPA) 3 class at State Islamic Senior High School (MAN) Blitar City. Data analysis techniques involved both qualitative and quantitative methods. The results indicate that the validation scores from the material and media experts were very valid, with an average percentage score of 98% and 95%, respectively. The student's responses to the limited trials were also very good, with an average percentage score of 88%. Overall, the study demonstrated the potential of the developed Android-based virtual laboratory media for chemistry education.
Improving Students' Basic Chemistry Competences Through Implementation of Class-Based Assessments in Inquiry-Based Chemistry Learning Suherman Suherman
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7448

Abstract

This study aims to improve students' basic competencies in Chemistry subjects on Compound Polarity by implementing Authentic Assessment assessments in inquiry-based Chemistry learning. This type of research is classroom action research, which consists of two cycles. Each cycle consists of four stages: action plan, implementation, observation/evaluation, and reflection. This research was carried out in the 11th grade of science (IA) 2 class, state senior high school (SMAN) 2 Dompu involving 36 students in 2021. Data on students' cognitive competence are collected by the test method, data on students' affective competence are collected by observation method, and data on students' psychomotor competence are collected by observation method. Furthermore, the three data were analyzed descriptively. The findings of this study showed that (1) there was an increase in students' cognitive competence from an average score of 67.72 with classical learning completeness of 52.84% in cycle I to an average score of 77.60 with classical learning completeness of 87.29% in cycle II, (2) there was an increase in students' affective competence from an average score of 81.40 with a suitable category in cycle I to an average score of 86.80 with an excellent category in cycle II, and (3) there was an increase in students' psychomotor competence from an average score of 67.43 with good category in cycle I to an average score of 78.25 with good category in cycle II. Thus, it can be concluded that there is an increase in students' basic competencies in chemistry through the implementation of classroom-based assessment in inquiry learning.
The Effect of Using Zenius.Net-Based Learning Video Media on Student Chemistry Learning Outcomes at MA Anshor Baiq Rina Amalia Safitri; Pahriah Pahriah; Wawan Putrayadi
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.7258

Abstract

The purpose of this study was to determine the effect of the use of Zenius.Net based learning video media on student chemistry learning outcomes. This type of research is descriptive quantitative. This research was carried out using the One Group Pretest-Posttest Design method which means that there is only one research group used. This research was conducted at MA Anshor with a total of 15 students, namely 10th grade as many as 8 people, and 11th grade as many as 7 people. Learning outcome data is taken based on students' cognitive tests. The data analysis technique used in this study combines descriptive data analysis for mean measurement and inferential statistics for significance testing of t-test values. The significance of the N-gain value is tested using a t-test (paired samples t-test). The average score obtained by students after using zenius.net-based learning videos of 76.47 is greater than the average score obtained by students before being given.

Page 1 of 2 | Total Record : 12

 1   2 

Filter by Year

2023 2023


Reset
Filter By Issues
All Issue Vol. 14 No. 1 (2026): February 2026 Vol. 13 No. 6 (2025): December 2025 Vol. 13 No. 5 (2025): October 2025 Vol. 13 No. 4 (2025): August 2025 Vol. 13 No. 3 (2025): June 2025 Vol. 13 No. 2 (2025): April 2025 Vol. 13 No. 1 (2025): February 2025 Vol 13, No 1 (2025): February 2025 Vol 12, No 6 (2024): December 2024 Vol. 12 No. 6 (2024): December 2024 Vol 12, No 5 (2024): October 2024 Vol. 12 No. 5 (2024): October 2024 Vol. 12 No. 4 (2024): August 2024 Vol 12, No 4 (2024): August 2024 Vol 12, No 3 (2024): June-July 2024 Vol. 12 No. 3 (2024): June-July 2024 Vol. 12 No. 2 (2024): April-May 2024 Vol 12, No 2 (2024): April-May 2024 Vol 12, No 1 (2024): February 2024 Vol. 12 No. 1 (2024): February 2024 Vol 11, No 6 (2023): December 2023 Vol. 11 No. 6 (2023): December 2023 Vol 11, No 5 (2023): October 2023 Vol 11, No 4 (2023): August 2023 Vol 11, No 3 (2023): June 2023 Vol 11, No 2 (2023): April 2023 Vol 11, No 1 (2023): February 2023 Vol 10, No 2 (2022): Hydrogen: Jurnal Kependidikan Kimia Vol 10, No 1 (2022): Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 1 (2021): Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 2 (2020): Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 1 (2020): Hydrogen: Jurnal Kependidikan Kimia Vol 7, No 2 (2019): Hydrogen: Jurnal Kependidikan Kimia Vol 7, No 1 (2019): Hydrogen: Jurnal Kependidikan Kimia Vol 6, No 2 (2018): Hydrogen: Jurnal Kependidikan Kimia Vol 6, No 1 (2018): Hydrogen: Jurnal Kependidikan Kimia Vol 5, No 2 (2017): Hydrogen: Jurnal Kependidikan Kimia Vol 5, No 1 (2017): Hydrogen: Jurnal Kependidikan Kimia Vol 4, No 2 (2016): Hydrogen: Jurnal Kependidikan Kimia Vol 4, No 1 (2016): Hydrogen: Jurnal Kependidikan Kimia Vol 3, No 2 (2015): Hydrogen: Jurnal Kependidikan Kimia Vol 3, No 1 (2015): Hydrogen: Jurnal Kependidikan Kimia Vol 2, No 2 (2014): Hydrogen: Jurnal Kependidikan Kimia Vol 2, No 1 (2014): Hydrogen: Jurnal Kependidikan Kimia Vol 1, No 2 (2013): Hydrogen: Jurnal Kependidikan Kimia Vol 1, No 1 (2013): Hydrogen: Jurnal Kependidikan Kimia More Issue