Article Per Year (5 Year)
p-Index From 2021 - 2026
2.338
P-Index
This Author published in this journals
All Journal Jurnal Teknik Kimia USU Journal of Applied Science, Engineering, Technology, and Education Integrated Science Education Journal EduLine: Journal of Education and Learning Innovation Journal Evaluation in Education (JEE) Journal Of Human And Education (JAHE) Jurnal Teknik Kimia USU Arfak Chem: Chemistry Education Journal
Pongkendek, Jesi Jecsen
Unknown Affiliation
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Social Sciences Other

Published : 13 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 13 Documents
Search

 1   2 
Pemanfaatan Cangkang Telur Terenkapsulasi sebagai Adsorben: Karakterisasi dan Studi Kinetika Adsorpsi Metilen Biru Parlindungan, John Yoro; Rusnadi; Siregar, Lamtiar Ferawaty; Pongkendek, Jesi Jecsen
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.22507

Abstract

The utilization of eggshell powder as an adsorbent presents certain limitations, particularly in terms of post-adsorption separation and the potential for clogging in column applications. To address these challenges, encapsulation was employed as a modification technique, wherein the eggshell powder was immobilized within a calcium alginate matrix to form a stable adsorbent structure. This study investigated the adsorption kinetics of methylene blue (MB) using three types of adsorbents: calcium alginate (CA), encapsulated eggshell powder (CA–SCKT), and unencapsulated eggshell powder (SCKT). Kinetic analysis was conducted using pseudo-first-order and pseudo-second-order models. The results indicated that the adsorption process for all adsorbents followed the pseudo-second-order kinetic model, as evidenced by higher correlation coefficient (R²) values.
Development of Merdeka Curriculum Teaching Modules focused on Green Chemistry Materials Setyowati, Giyarsih; Siregar, Lamtiar Ferawaty; Pongkendek, Jesi Jecsen; Parlindungan, John Yoro
Integrated Science Education Journal Vol 5 No 3 (2024): September
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/isej.v5i3.1885

Abstract

Purpose of the study: To find out the procedure for developing Merdeka Curriculum teaching modules on green chemistry material and producing products in the form of teaching modules on green chemistry material that are valid and practical. Methodology: This type of research is R&D using the 4D model, but in this study, it only reached the 3D stage, namely Define, Design, and Develop. The subjects of this study were 2 people validating the teaching module, 5 teachers responding, and 34 students of class X/Phase E of Senior High Scool 2 Merauke. The instruments used in data collection were interviews, questionnaires, and validation. Main Findings: The results of this study indicate that the Merdeka curriculum teaching module on green chemistry material from the product validation assessment is 95% with a very valid category. Reviewed from the practicality aspect, it can be seen from the teacher response assessment of 92% with a very practical category. Based on the results of the study, the Merdeka curriculum teaching module on green chemistry material is declared valid and practical to use. Novelty/Originality of this study: The teaching modules that are compiled are integrated with student abilities, facilities and infrastructure of Phase E at Senior High Scool 2 Merauke, assessments, materials are integrated with the local context. The teaching modules that are compiled are adjusted to the students' learning styles and have been validated by the validator.
Teachers' and Students' Feedback on Sociocultural Interactive Digital Modules for Science Literacy and Problem-Solving: A Transformative Learning Approach Simbolon, Merta; Pongkendek, Jesi Jecsen; Henukh, Anderias; Rochintaniawati, Diana
Journal Evaluation in Education (JEE) Vol 6 No 1 (2025): January
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jee.v6i1.1314

Abstract

Purpose of the study: This article examines the practicality of sociocultural-based interactive digital modules in improving students' science literacy and problem-solving skills by integrating a transformative learning approach. Methodology: This descriptive research analyzes students' and teachers' responses to the developed interactive digital module. The study was conducted in junior high schools in Merauke Regency and Boven Digoel Regency, South Papua Province, totaling six schools. Data were collected through responses from 6 science teachers and 60 students involved in learning science with the module. Main Findings: The results showed that this module is efficient for use in science learning, according to the responses from teachers and students. Feedback from teachers and students indicated that this module is efficient to use in science learning, as seen from the average total percentage given by teachers of 95% in the efficient category and provided by students of 95.53% in the efficient category. Through this article, the developed interactive digital module is feasible to use in science learning to improve science literacy and problem solving skills of junior high school students.. Novelty/Originality of this study: The module is designed with an approach that combines Papuan local wisdom values and transformative learning principles. This approach is rarely implemented simultaneously in the context of science learning to improve students' understanding of science. In addition, the interactive digital module not only focuses on understanding science materials but also connects them with local wisdom to increase the relevance of learning to students' daily lives.
Co-Authors Anderias Henukh Anwar Anwar Arrang, Meylisa Liku Azzajjad, Muhammad Fath Dewi Satria Ahmar Diana Rochintaniawati Haris Munandar Jefri Sembiring John Yoro Parlindungan Kusumah, Rangga Mani Yusuf Marpaung, Dewi Natalia Mendes, Johana Novike Bela Sumanik Rahmatia, Sitti Rusnadi Rusnadi Sarijan, Abdullah - Setyowati, Giyarsih Simbolon, Merta Siregar, Lamtiar Ferawaty Sukirno Sukirno