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Salmahaminati
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Department of ChemistryFaculty of Mathematics and Natural ScienceUniversitas Islam IndonesiaProf. Dr. H. Zanzawi Soejoeti Building, Kampus Terpadu UII Jl. Kaliurang Km.14,5 Sleman, Yogyakarta, 55584
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INDONESIA
IJCR (Indonesian Journal of Chemical Research)
Published by Universitas Islam Indonesia
ISSN : 23549610     EISSN : 26145081     DOI : 10.20885
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
IJCR is intended to be the journal for publishing articles reporting the results of research on Chemistry field with related topics, as well as with their development through interdisciplinary and multidisciplinary approach. The types of articles published in this journal include research articles, review articles and short communication. This journal covers some topics include: Inorganic Chemistry Physical Chemistry Computational Chemistry Biochemistry Analytical Chemistry Organic Chemistry Food and Medicinal Chemistry Environmental Chemistry Material Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 122 Documents
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Temperature Effects on Growth and Culture Stability of Chlorella sp. in Laboratory Cultivation Anggraini, Winda Trisna; Santoso, Ruth Suci Wadini; Saputri, Wulandari Prasetya; Prakoso, Nurcahyo Iman; Utami, Maisari; Sasongko, Setyo Yanus; Purwiandono, Gani
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 11 No. 1 (2026): Volume 11, ISSUE 1, 2026
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol11.iss1.art5

Abstract

The growth behavior of chlorella sp. was evaluated under different temperature conditions to examine how thermal variation influences microalgal biomass production and culture dynamics. Cultivation experiments were conducted at 28, 35, and 40°C under continuous illumination with aeration. Biomass accumulation was monitored through optical density measurements at 680 nm, while physicochemical parameters including pH and total dissolved solids (TDS) were recorded throughout cultivation. Stable biomass accumulation was observed at 28°C, whereas growth became less consistent at 35°C and declined at 40°C, indicating increasing thermal stress at higher temperatures. Variations in pH and TDS during cultivation supported the observed temperature-dependent metabolic response. The analytical workflow used to monitor microalgal growth was further evaluated using the AGREE metric based on the principles of Green Analytical Chemistry. The estimated AGREE score of approximately 0.76 indicates a moderately green analytical procedure. The results highlight the importance of temperature control in maintaining stable microalgal cultivation and demonstrate the potential of integrating environmental performance assessment into microalgal growth studies.
Binder Engineering of Leather Shaving Waste–Based Collagen Composite for Shoe Insole Application: Mechanical–Moisture Trade-Off Analysis Winata, Wahyu Fajar; Nurbalia, Elis; Rahmayani, Elyka; Dewi, Zahra Saadiya; Tiyastuti, Rini
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 11 No. 1 (2026): Volume 11, ISSUE 1, 2026
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol11.iss1.art6

Abstract

Leather shaving waste (LSW) generated from the tannery industry contains chromium-stabilized collagen fibers that are environmentally persistent and difficult to manage. This study investigates the valorization of LSW into leather board for shoe insole applications through binder system engineering. LSW was neutralized using alkaline treatment and compounded with polyester resin and polyvinyl acetate (PVAc), followed by press molding. Mechanical properties and water absorption were evaluated according to SNI 1294-2009 standards. The results show that binder composition significantly influences interfacial adhesion, mechanical strength, and moisture sensitivity. Formulation F3 exhibited superior tensile and tear strength due to enhanced fiber–matrix bonding, while formulation F4 demonstrated improved water resistance. An Engineering Performance Index (EPI) was introduced to integrate mechanical strength and moisture stability, revealing a clear trade-off between maximum mechanical performance and durability against water absorption. Formulation F6 presented a more balanced mechanical–moisture profile suitable for practical insole applications. These findings confirm that binder engineering governs the structure–property relationship of collagen-based composites and provides a sustainable pathway for circular utilization of tannery solid waste.

Page 13 of 13 | Total Record : 122

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