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All Journal Al-Jabar : Jurnal Pendidikan Matematika Jurnal Teknologi Pangan dan Industri Perkebunan
Mijra, Mijra
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Agriculture, Biological Sciences & Forestry Education Mathematics

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Uji Kualitatif Kandungan Asam Pada Kosmetik dan Bahan Pangan Menggunakan FeCL3 Oileri Tikirik, Wita; Fakhrurosi, Fakhrurosi; Ibrahim, Ibrahim; Mijra, Mijra; Erza Rahma Kartini, Ade; Yunika, Hilma; Ayu Lestari, Nesti
Jurnal Teknologi Pangan dan Industri Perkebunan (LIPIDA) Vol 3 No 2 (2023)
Publisher : Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/lipida.v3i2.1464

Abstract

This research aims to carry out qualitative tests on the acid content of four different samples, namely MBK Powder, Salicyl Powder, Citric Acid, and Soy Sauce, using FeCl3 as a reagent. This method is used to identify the presence of certain acid compounds in these samples. The samples were tested by adding FeCl3 solution to the sample solution. Color changes that occur are observed and recorded. The observed reactions are considered indicators of the presence of certain acids in the sample. The results of the study showed that MBK powder, salicyl powder and soy sauce showed significant color changes after being reacted with FeCl3. This color change indicates the presence of phenolic compounds, including salicylic acid in these samples. However, in the Citric Acid sample, there was no significant color change, indicating that citric acid does not react typically with FeCl3 in the context of this qualitative test. This research provides an important contribution in understanding the chemical content of various types of samples and shows that qualitative tests using FeCl3 can be an effective method for detecting the presence of phenolic compounds in samples of MBK Powder, Salicyl Powder and Soy Sauce.
Technological, pedagogical, and content knowledge among mathematics teachers: Difference of teaching experience and certification status Badjeber, Rafiq; Yulia, Yulia; Mijra, Mijra; Winda, Winda
Al-Jabar: Jurnal Pendidikan Matematika Vol 15 No 2 (2024): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v15i2.24673

Abstract

Background: Teachers continue to face challenges in applying Technological, Pedagogical, and Content Knowledge (TPACK) in classroom settings. Many mathematics teachers, in particular, lack adequate preparation and mastery of the three core components of TPACK.Aim: This study aims to investigate and analyze differences in TPACK proficiency among mathematics teachers based on their teaching experience and certification status.Method: Adopting a mixed-method approach with a sequential explanatory design, the study involved 65 Islamic Junior and Senior High School mathematics teachers in Palu City, selected through proportionate stratified random sampling. Additionally, four teachers were interviewed to gain deeper insights. The instruments used included TPACK questionnaires and structured interview guidelines.Results: The findings revealed no significant differences in TPACK proficiency between certified and non-certified mathematics teachers. While teachers demonstrated a solid understanding of content and appropriate teaching methods, they seldom incorporated technology into their instruction. Furthermore, teaching experience showed no substantial impact on TPACK proficiency. Junior teachers were observed to have better familiarity with technology, while senior teachers exhibited greater adaptability in managing diverse classroom situations.Conclusion: Certification status and teaching experience do not significantly influence TPACK proficiency among mathematics teachers. The primary barrier to integrating technology lies in limited access to adequate facilities. Continued professional development initiatives are essential to enhance teachers' technological competencies and their integration into classroom practices.
Co-Authors Ayu Lestari, Nesti Badjeber, Rafiq Erza Rahma Kartini, Ade Fakhrurosi, Fakhrurosi Ibrahim Ibrahim Oileri Tikirik, Wita Winda Winda Yulia Yulia Yunika, Hilma