HISKIA : Jurnal Ilmu Kimia & Pendidikan Kimia
Jurnal Hiskia merupakan jurnal ilmiah yang dikelola oleh Program Studi Pendidikan Kimia, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Katolik Widya Mandira. Jurnal ini terbit dengan frekuensi 2 (dua) kali dalam setahun, yaitu pada bulan Juli dan Januari. Naskah artikel yang dimuat dalam Jurnal ini berupa Artikel Orisinal, Artikel Singkat, dan Artikel Tinjauan yang bertujuan untuk memberikan kontribusi pada pembahasan penelitian, pengalaman, pengembangan, pengajaran, dan diseminasi yang terkait dengan bidang kimia dan Pendidikan kimia. Fokus dan ruang lingkup Jurnal Hiskia adalah pada bidang ilmu kimia (Kimia organik, Kimia anorganik, Kimia fisika, Biokimia dan bioteknologi, Kimia material, dan Lingkungan kimia) dan pendidikan serta pengajaran kimia (strategi, model, metode, pendekatan pembelajaran kimia; media pembelajaran kimia; TIK dalam pembelajaran kimia; inovasi pembelajaran kimia; evaluasi dan asesmen pembelajaran kimia).
Uji Efektivitas Antihiperglikemia Fraksi Etil Asetat Daun Jarak Pagar (Jatropha curcas L.) terhadap Mencit Jantan (Mus musculus) Diabetes
Diabetes melitus merupakan penyakit metabolik kronis yang ditandai dengan hiperglikemia akibat gangguan sekresi atau kerja insulin. Salah satu pengobatan alternatif yang terus dikembangkan adalah pemanfaatan tanaman obat tradisional, salah satunya daun jarak pagar (Jatropha curcas L.) yang diketahui mengandung senyawa bioaktif seperti flavonoid, saponin, tanin, polifenol dan alkaloid untuk memperbaiki sel ? pankreas. Tujuan penelitian ini untuk mengetahui efektivitas fraksi etil asetat daun jarak pagar (Jatropha curcas L.) terhadap penurunan kadar glukosa darah pada mencit jantan (Mus musculus) yang diinduksi dengan aloksan. Penelitian ini merupakan penelitian kuantitatif dengan model rancangan penelitian eksperimental murni, Mencit putih jantan diinduksi dengan aloksan, kemudian dilakukan pengujian terhadap lima kelompok perlakuan yaitu kontrol negatif (Na CMC 5%), kontrol positif (Metformin 65 mg/kg BB), fraksi etil asetat daun jarak pagar (FEADJP) dosis 100 mg/kgBB, 125 mg/kgBB dan 150 mg/kg BB. Hasil penelitian menunjukkan FEADJP 150 mg/kg BB memberikan penurunan kadar glukosa darah (KGD) yang paling optimal sebesar 109 mg/dl, FEADJP 125 mg/kgBB menurunkan KGD sebesar 89,2 mg/dl dan FEADJP 100 mg/kgBB menurunan KD sebesar 54,6 mg/dl. Hal ini membuktikan bahwa Fraksi etil asetat ekstrak etanol daun jarak pagar (Jatropha curcas L.) dosis 125 dan 150 mg/kgBB memberikan pengaruh penurunan KGD terhadap mencit jantan (Mus musculus) yang diinduksi dengan aloksan secara signifikan (F< 0,05).
Hak Cipta (c) 2026 HISKIA : Jurnal Ilmu Kimia & Pendidikan Kimia
Analisis Perkembangan Kemampuan Mengidentifikasi Variabel pada Mahasiswa Pendidikan Kimia Tingkat Awal
Abstract. This study analyzed the development of variable identification skills among early-level chemistry education students, a crucial component of scientific literacy and experimental design. The research addressed the varied initial competencies and the progression of these skills over time, identifying common difficulties. Employing a quantitative descriptive-longitudinal design, the study involved 8 chemistry education students from a university in Indonesia. Data were collected through written tests at three time points (beginning, middle, and end of the semester) to measure the ability to identify independent, dependent, and control variables. Supplementary qualitative data from observations and interviews provided deeper insights into student difficulties and contributing factors. Results indicated a significant improvement in students' variable identification skills throughout the semester, with average scores increasing from 65.0 to 79.8. Despite overall progress, students consistently faced challenges, particularly in distinguishing between independent and control variables and identifying implicitly stated dependent variables. Factors contributing to this development included prior practical experience, explicit instruction from lecturers, and active group discussions. The findings highlight the importance of structured learning experiences and targeted interventions to address specific misconceptions in developing fundamental scientific process skills among prospective chemistry teachers.
Hak Cipta (c) 2025 HISKIA : Jurnal Ilmu Kimia & Pendidikan Kimia
Analisis Respon Peserta Didik terhadap Penerapan Pendekatan Discovery Learning pada Materi Laju Reaksi Kelas XI IPA SMA Kristen Maktihan Malaka
Learner response is the interaction and response given by students to learning. Discovery Learning is an approach that encourages students to discover concepts for themselves through exploration and observation. The response of students in class XI IPA SMA Kristen Maktihan Malaka to chemistry learning is still low. This study aims to analyse the response of students in class XI IPA to the Discovery Learning approach on reaction rate material. The sample in this study were students of class XI IPA SMA Kristen Maktihan. The type of research used in this research is descriptive quantitative. The instrument used is a questionnaire sheet of students' responses. This study used a questionnaire technique in data collection. The results of this study indicate that the response of students in class XI IPA SMA Kristen Maktihan Malaka to the Discovery Learning approach on reaction rate material is very good with an average percentage obtained of 91%.
Learner Response; Discovery Learning Approach; Reaction Rate
A ASSESSMENT OF/AS/FOR LEARNING: ANALISIS PRINSIP-PRINSIP DAN FILOSOFI PENILAIAN SERTA IMPLEMENTASINYA DALAM PEMBELAJARAN KIMIA
The assessment system is one of the important aspects that contribute to improving the quality of education in general. Therefore, it is important to review the principles and philosophy of assessment, the implementation of assessment of, as, and for learning, the role of technology that increases the effectiveness of assessment, especially in chemistry learning. The method used in this review is narrative literature review. This review produces several important points, namely first, assessment in chemistry learning needs to be aligned with learning objectives, use of various methods, and provide constructive feedback that can increase student understanding and engagement. Second, the philosophy of assessment emphasizes the development of effective evaluation instruments, technology integration and results-based approaches that support meaningful and in-depth learning. Third, good assessment needs to involve three main approaches: feedback and continuous improvement during the learning process (Assessment for Learning/AfL), assessing the final learning outcomes through exams and summative tasks (Assessment of Learning/AoL), and involving students in the assessment process to reflect and improve understanding (Assessment as Learning/AaL). Fourth, the development of information and communication technology (ICT) has increased the effectiveness of assessment in chemistry education by providing a variety of innovative tools and methods, such as computer-based assessment.
Karakteristik Pigmen Kubis Merah (Brassica oleracea L.) sebagai Indikator pH Alami yang Ramah Lingkungan
Acid–base indicators, also known as pH indicators, are chemical substances that exhibit distinct color changes in acidic or basic solutions. Commonly used indicators in chemical analysis are typically synthetic, toxic, expensive, and environmentally unfriendly. Red cabbage (Brassica oleracea L.) is a vegetable rich in anthocyanins, natural pigments responsible for plant coloration, which are sensitive to pH changes. This property makes them a potential source of eco-friendly, inexpensive, and non-toxic natural pH indicators. This study aimed to examine the color characteristics of Red Cabbage Extract (RCE) in solutions with pH values ranging from 1 to. The results showed that RCE had a deep red color in its concentrated form, bright pink at pH 1–2, pale pink at pH 3–6, pale purple at pH 7, pale blue at pH 8–10, bluish-green at pH 11–12, yellowish-green at pH 13, and yellow at pH 14. RCE also exhibited clear and distinguishable color changes when used to identify various household samples. These findings suggest that RCE is an effective, low-cost, and eco-friendly natural pH indicator that supports the principles of green chemistry.
Analisis Kualitas Instrumen Penilaian Keterampilan Kimia Berbasis Etnosains NTT: Perspektif Mahasiswa Pendidikan Kimia
Abstract This study aims to analyze the quality of East Nusa Tenggara (NTT) ethnoscience-based chemistry skill assessment instruments from the perspective of chemistry education students. These instruments are designed to measure scientific process skills, higher-order thinking skills (HOTS), and understanding of chemistry concepts integrated with NTT local wisdom. The research method used was quantitative descriptive with a survey design. The research subjects were active students in the Chemistry Education Study Program who had developed similar instruments. Data were collected using a questionnaire with a 5-point Likert scale and analyzed using descriptive statistics to obtain mean values and quality categories. The results showed that the instruments developed by the students generally had good quality in various aspects. In terms of alignment with learning objectives, the instruments showed adequate to good quality, although the measurement of higher-order thinking skills (HOTS) still requires improvement. The relevance of NTT ethnoscience to chemical concepts also showed good quality, particularly in terms of integration and scientific accuracy. The validity aspects, especially content and face validity, were categorized as good to very good, while construct validity was adequate. The reliability of the instruments showed fairly good to good quality, with strong assessment objectivity. Furthermore, the format and language aspects of the instruments were rated as good to very good, supported by clear instructions and good layout. Finally, the feasibility of implementing the instruments showed good quality, reflecting time efficiency, utilization of local resources, and suitability for the educational level. The conclusion indicates that this instrument has great potential as a valid and reliable measurement tool in the context of NTT ethnoscience-based chemistry learning
Keywords: Ethnoscience; Assessment instrument; Chemistry skills; Quality; NTT