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All Journal Jurnal Inovasi Teknologi Pendidikan Jurnal Ilmiah Berkala: Sains dan Terapan Kimia
Burhanuddin Ronggopuro
Universitas Negeri Malang
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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Study of Formaldehyde Content in Different Types of Tofu Using Micro Scale Laboratory Based Visible Beam Spectrophotometry Atikah Atikah; Burhanuddin Ronggopuro
Jurnal Sains dan Terapan Kimia Vol 17, No 1 (2023)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v17i1.13948

Abstract

Microscale laboratory is an analytical technique that requires a little reagent and produces a little waste. One application of microscale laboratory is the analysis of formaldehyde content in tofu. Formaldehyde is one of the chemicals that is harmful to the body but is often misused as a food preservative in tofu. This study aims at determining the presence of formaldehyde in tofu using laboratory microscale-based Schiff reagents. The use of microscale laboratories is expected to reduce waste and support the implementation of green chemistry. The method used was a calibration curve using a series of standard solutions of 10 ppm, 15 ppm, 20 ppm, 25 ppm, and 30 ppm with scanning at a wavelength of 561 nm. In the qualitative test, all samples were reactive and showed a purplish red color. In the qualitative test, the highest formaldehyde content in the tofu sample was obtained in the white tofu 3 with a content of 99.7 ppm.
Analysis of the needs of teachers of SMAN 3 Sidoardjo in the creation and use of learning media Jacky Anggara Nenohai; Deni Ainur Rokhim; Zelen Surya Minata; Nur Indah Agustina; Kafita Krisnatul Islamiyah; Burhanuddin Ronggopuro; Habiddin Habiddin; Ristiwi Peni; Bambang Wahyudi; Asnan Wahyudi
Jurnal Inovasi Teknologi Pendidikan Vol 10, No 3 (2023): September
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jitp.v10i3.54691

Abstract

This study aims to analyze the needs of teachers of SMAN 3 Sidoardjo in the creation and use of learning media in the teaching and learning process. The research method used is descriptive qualitative by taking data through a Google form-based questionnaire filled out online. The subjects of the study were 51 teachers of SMAN 3 Sidoardjo. The results of the survey based on questionnaire data obtained showed that the learning media used by the teachers of SMAN 3 Sidoardjo in the teaching process was made by as much as 72.5% and 27.5% were not made by themselves, so the media was obtained from Youtube, Google, and colleagues. The media created by several teachers has obstacles, namely mastery of IT (editing and programming languages), a long time in the development process, and its use has not adjusted to the characteristics of students and unites several media and materials in one platform such as  Learning Management System. Therefore, teachers need training and direct assistance in making intensive and simple learning media without using programming languages, flexible time, and accessible anywhere and anytime. Website-based media to accommodate all the material and learning resources taught so that students can easily use the press and improve their understanding of the material and the quality of learning So that teachers and students can adjust the scope and face problems in the learning process by the demands of the times.
Co-Authors Asnan Wahyudi Atikah Atikah Bambang Wahyudi Deni Ainur Rokhim Habiddin Jacky Anggara Nenohai Kafita Krisnatul Islamiyah Nur Indah Agustina Ristiwi Peni Zelen Surya Minata