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All Journal Indonesian Journal of Science and Technology Academy of Education Journal
Fitriyanti, Maya
Institut Teknologi Bandung
Computer Science & IT Education Environmental Science Social Sciences Other

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Bacterial Cell Inactivation Using a Single-Frequency Batch-Type Ultrasound Device Poetro Sambegoro; Maya Fitriyanti; Bentang Arief Budiman; Kamarisima Kamarisima; Sekar Wangi Arraudah Baliwangi; Calvin Alverian; Saeed Bagherzadeh; Ganesan Narsimhan; Pingkan Aditiawati; Ignatius Pulung Nurprasetio
Indonesian Journal of Science and Technology Vol 6, No 1 (2021): IJOST: VOLUME 6, ISSUE 1, April 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v6i1.31516

Abstract

Ultrasound technology employs cavitation to generate high-pressure soundwaves to disrupt bacterial cells. This study reveals the effectiveness of a single frequency ultrasound device for bacterial cell inactivation. A low-cost ultrasound device having a single frequency, i.e. 22 kHz for lab-scale application, was developed first, and the prototype was mechanically designed and analyzed using the finite-element method to assure the targeted natural frequency could be achieved. The prototype was then tested inactivating bacterial cells, Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis), in a simple medium and a food system, and the results were then compared to a commercial system. A treatment time of up to 15 minutes was able to reduce E. coli and B. subtilis cells by 3.3 log and 2.8 log, respectively, and these results were similar to those of the commercial system. The effectiveness of bacterial cell inactivation using the developed single-frequency ultrasound device is then discussed. The findings are useful for designing low-cost ultrasound devices for application in the food industry.
Nilai-nilai Pendidikan Karakter dalam Seloko Adat Kelurahan Sengeti Fitriyanti, Maya; Salam, M.; Melisa, Melisa
Academy of Education Journal Vol. 15 No. 1 (2024): Academy of Education Journal
Publisher : Fakultas Keguruan dan Ilmu Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47200/aoej.v15i1.2259

Abstract

Introduction. The research aims to determine the values of character education in the traditional seloko of Sengeti subdistrict. The purpose of this article is to find out what character education values are contained in traditional seloko. Research methods. The research method used in this research is descriptive, namely an ethnographic study which aims to explain the values of character education in the traditional seloko of Sengeti Village. Results and Discussion. The results of this research illustrate: first, carrying out and applying various traditional seloko activities based on the Hadith and Al-Qur'an in accordance with the value of religious character education. Second, the attitude of thinking and acting in traditional seloko is based on a sense of sincerity and enthusiasm in accordance with the values of nationalist character education. Third, a responsible and trustworthy attitude in traditional seloko is in accordance with the value of independent character education. Fourth, an attitude of mutual assistance, respect and enthusiasm in accordance with the value of mutual cooperation character education. Fifth, an attitude of trustworthiness and trustworthiness is in accordance with the character education value of integrity. Conclusions and suggestions. Seloko Adat contains character education values. It is hoped that traditional institutions and the government will carry out traditional seloko training for the next generation of young people in Sengeti Village.
Co-Authors Bentang Arief Budiman Calvin Alverian Ganesan Narsimhan Ignatius Pulung Nurprasetio Kamarisima Kamarisima Melisa Melisa Pingkan Aditiawati Poetro Sambegoro Saeed Bagherzadeh Salam, M. Sekar Wangi Arraudah Baliwangi