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All Journal IJCER (International Journal of Chemistry Education Research) IJCR (Indonesian Journal of Chemical Research)
Aminati, Salmah
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Materials Science & Nanotechnology

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Enhancing Learning Interest in the Collaborative Learning Practitioner Lecture: Training on Determining the Viscosity of Palm Kernel Oil (PKO) Aminati, Salmah; Purwiandono, Gani
IJCER (International Journal of Chemistry Education Research) VOLUME 8, ISSUE 2, OCTOBER 2024
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcer.vol8.iss2.art10

Abstract

This study aims to determine the effects in physical chemistry class with the workshop sessions on measuring PKO viscosity by CV. Bina Agro Mandiri. The effects are evaluated through the enhancing of student's learning interest in the Physical Chemistry II class in Chemistry Program of the Islamic University of Indonesia, which presents a good avenue for this investigation. The study was conducted by classroom, practical and online action. The data were analyzed using a pie chart. Findings showed that the implementation of the practical was able to increase the student's learning interests. Through case analysis tasks, students participate significantly in the teaching-learning process.
Synthesis Of Chitosan From Lobster (Nephropidae) Shell Using Reflux Heating Method Aminati, Salmah; Brilliany, Rhaina Annadroh; Dini Aprilia , Segi Tasya; Arini, Regita Putri; Warahmah, Siti Aisyah Mawaddah; Cahayaningsih, Ananda Capriyati
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 10 No. 1 (2025): Volume 10, ISSUE 1, 2025
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol10.iss1.art5

Abstract

Chitosan synthesis from lobster shell waste (Neurophidae) has been carried out using a conventional heating method using reflux. The synthesis of chitin into chitosan was carried out by demineralization using a 5% (v/v) HCl solution, followed by a deproteination process using a 3.5% NaOH solution with a ratio of 1:10 (w/v) until chitin was formed. The chitin formed was then deacetylated using a 40% (w/v) NaOH solution until chitosan was formed. Analysis of the synthesized chitin and chitosan included confirmation of the FTIR spectra, as well as determining the degree of deacetylation of chitosan. The characterization results showed that lobster shell waste can be synthesized into chitosan using a conventional heating method at a temperature of 50-70 °C for 1 hour. The chitosan formed had a degree of deacetylation of 73.92%. Meanwhile, the yield of chitin was 35% and the yield for chitosan was 13%.
Co-Authors Arini, Regita Putri Brilliany, Rhaina Annadroh Cahayaningsih, Ananda Capriyati Dini Aprilia , Segi Tasya Gani Purwiandono, Gani Warahmah, Siti Aisyah Mawaddah