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Teacher Professionalism in Professional Perspective and Educational Management: An Exploratory Study at UPTD SMP Negeri 2 Gunungsitoli Idanoi Nurin Aprillinia Zalukhu; Christi Elissabeth Zendrato; Karuniaman Hia; Destin Cerah Anggela Hulu; Dewi Sandra Zamili; Natalia Kristiani Lase
GEN BIONIX: Jurnal Ilmiah Pendidikan Biologi Vol 4 No 2 (2026): GEN BIONIX: Jurnal Ilmiah Pendidikan Biologi
Publisher : Program Studi Pendidikan Biologi - Universitas Nias

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56207/genbionix.v4i2.949

Abstract

Teacher professionalism is one of the key factors determining the quality of education. This study aimed to explore teacher professionalism from the perspectives of the teaching profession and educational management at UPTD SMP Negeri 2 Gunungsitoli Idanoi. The study employed a descriptive qualitative approach with an exploratory research design. Data were collected through interviews, observations, and documentation involving the school principal and a science teacher as research informants. The collected data were analyzed using descriptive qualitative techniques, including data reduction, data presentation, and conclusion drawing. The findings revealed that teacher professionalism at UPTD SMP Negeri 2 Gunungsitoli Idanoi is generally categorized as good, as indicated by the majority of teachers having completed the Teacher Professional Education Program (PPG) and obtained teaching certificates. Teachers actively participate in various professional development activities to enhance their competencies. From the educational management perspective, the school supports teacher professionalism through training programs, effective teacher management, and the provision of learning facilities. However, challenges remain, particularly related to limitations in educational facilities and infrastructure, including laboratory equipment, as well as diverse student characteristics. The school addresses these challenges through collaboration among teachers, counseling staff, and parents. Overall, teacher professionalism has shown positive development and continues to require support through sustainable competency improvement and educational facility enhancement.
Literature Study on Food Preservation Methods and Their Effects on Product Quality and Shelf Life Novelina Andriani Zega; Mashati Bate'e; Marina Gea; Dewi Sandra Zamili; Irene Infak Halawa; Lestariani Zebua; Seniman Putri Sari Zega
GEN BIONIX: Jurnal Ilmiah Pendidikan Biologi Vol 4 No 2 (2026): GEN BIONIX: Jurnal Ilmiah Pendidikan Biologi
Publisher : Program Studi Pendidikan Biologi - Universitas Nias

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56207/genbionix.v4i2.962

Abstract

Food preservation is an essential technology in the food industry aimed at maintaining product quality, ensuring food safety, and extending shelf life. Various preservation methods have been developed, ranging from conventional techniques such as refrigeration, freezing, drying, and fermentation to modern technologies including vacuum packaging, Modified Atmosphere Packaging (MAP), edible coatings, and non-thermal processing. This article aims to review different food preservation methods and analyze their effects on food quality and shelf life based on published scientific studies. The research employed a literature review method by collecting and analyzing relevant national and international journal articles on food preservation technologies. The findings indicate that each preservation method operates through different mechanisms to inhibit microbial growth, enzymatic activity, and chemical reactions responsible for food deterioration. Refrigeration and freezing effectively slow biological spoilage, while drying reduces moisture content and limits microbial growth. Fermentation enhances product stability and may improve functional properties. Furthermore, modern preservation technologies, such as MAP, edible coatings, and non-thermal methods, have demonstrated greater effectiveness in maintaining nutritional value, color, texture, and sensory characteristics of food products. Combining multiple preservation techniques often provides superior results in extending shelf life without significantly compromising product quality. Therefore, selecting appropriate preservation methods is crucial for maintaining food quality, ensuring safety, and minimizing postharvest losses during storage and distribution.