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All Journal Kappa Journal Indonesian Journal of Teacher Education
Lestari, Sintya Dewi
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Astronomy Education Languange, Linguistic, Communication & Media Physics Social Sciences Other

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Studi Pengaruh pH Terhadap Stabilitas Warna dan Kuat Tarik Kain Katun dengan Pewarna Alami Antosianin Rahayu, Susi; Lestari, Sintya Dewi; Budianto, arif; Alaydrus, Alfina Taurida; Akhyar, Halil
Kappa Journal Vol 9 No 1 (2025): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.29595

Abstract

Lombok has become one of the leading tourist destinations, especially with the development of the Mandalika Special Economic Zone. One of the cultural products that has the potential to be offered to tourists is Lombok traditional weaving. The study aims to analyze the effect of the pH of the dye solution on the characteristics of the dyed fabric. The research method uses a mechanical thermal method to obtain anthocyanin powder extraction, standard staining methods namely mordan, staining, and fixation, as well as characterization using tensilons, Color Analyzer software, Hooloovoo, and Encycolorpedi website. The extraction of anthocyanin compounds from teak leaves (Tectona grandis) was successfully carried out by mechanical thermal method. Color analysis and identified color changes are significantly affected by differences in solution pH. The higher the pH used, the darker the color will be produced and the higher the level of color fading in the fabric. The smallest  E value is at pH 6 =5.364 and the largest  E value is at pH 14 = 17.145. However, an increase in pH tends to increase the tensile strength of the fabric. However, the optimum tensile strength condition was obtained in a solution of pH 12, which was 17.414 MPa, while at pH 13 and pH 14, the tensile strength of the fabric decreased to 16.071 MPa. Based on the analysis of the influence of pH of dye solution on fabric tensile strength, it was identified that a 6th-order polynomial model (determination coefficient R2 = 0.9479) was identified as accurate enough to model the influence of pH on fabric tensile strength. Therefore, this finding has potential in the textile industry, especially in increasing the economic value of Lombok weaving.
Critical Thinking and Literacy in the Digital Era: A Literature Review on Essential Skills for 21st Century Learners Anggriani, Ni Ketut; Pratiwi, Nanda Aulia; Pranahita, Dewa Dwi; Apriyani, Paramita Putri; Lestari, Sintya Dewi
Indonesian Journal of Teacher Education Vol. 7 No. 1 (2026): Edisi Januari-Juni 2026
Publisher : Indonesian Publication Center

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The rapid development of digital technology has transformed the way individuals access, process, and utilize information in various aspects of life, including education. In the context of 21st-century learning, students are required to possess digital literacy and critical thinking skills to evaluate information effectively in an increasingly complex digital environment. This study aims to analyze the relationship between digital literacy and critical thinking as essential skills for 21st-century learners. This research employed a Systematic Literature Review (SLR) method by examining 30 scholarly articles published between 2016 and 2025. The data were collected from several academic databases, including Google Scholar, DOAJ, ERIC, and ScienceDirect, using the keywords critical thinking, digital literacy, digital learning, and 21st-century skills. The article selection process followed the PRISMA approach, while thematic analysis was used to identify research patterns and key themes. The results indicate that digital literacy plays a significant role in enabling students to access, understand, and critically evaluate digital information. Furthermore, the integration of digital technology in learning environments can enhance students’ critical thinking skills through activities such as information analysis, online discussions, and collaborative learning. The findings also reveal that digital literacy and critical thinking are closely interconnected and mutually reinforcing competencies that support effective learning in the 21st century. Therefore, integrating these competencies into educational curricula is essential to prepare students for the challenges of the digital era.
Co-Authors Alfina Taurida Alaydrus Anggriani, Ni Ketut Apriyani, Paramita Putri Arif Budianto Halil Akhyar Pranahita, Dewa Dwi Pratiwi, Nanda Aulia Susi Rahayu