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All Journal Indonesia Chimica Acta Communications in Science and Technology Indonesian Journal of Chemical Analysis (IJCA) Jurnal Pijar MIPA Molekul: Jurnal Ilmiah Kimia
Maria Monica Sianita
Department of chemistry, Faculty of mathematics and natural science State, Surabaya University
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics

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Development and Characterization of Edible Films Based on Gelatin/Chitosan Composites Incorporated with Zinc Oxide Nanoparticles for Food Protection Bahar, Asrul; Samik, Samik; Sianita, Maria Monica; Kusumawati, Nita; Khafidlah, Ianatul; Muslim, Supari; Auliya, AR. Sella
Molekul Vol 18 No 3 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.3.6630

Abstract

The increase in cases of global environmental pollution due to plastic waste makes the development of biodegradable active packaging very urgent. Gelatin (G), is one of the potential edible film raw materials. However, its weak water barrier and mechanical properties have limited its wide application. The addition of chitosan nanofiber (CHNF) and zinc oxide nanoparticles (ZnONP) is expected to improve the mechanical and barrier properties and present antioxidant and antimicrobial properties to the G film. Characterization results using FTIR, SEM, and DSC showed good compatibility between the G, CHNF, and ZnONP matrix. Meanwhile, the packaging test results confirmed that gelatin, CHNF, and ZnONP-based composite films have the potential to be used as functional materials in food packaging.
The Effectiveness of Bulk Polymerization and Precipitation Polymerization on the Adsorption Capacity of Pb(II) Metal Ions Using Ionic Imprinted Polymer (IIP) Hayu Anggraini, Hayu Anggraini; Sianita, Maria Monica
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 17, No 2: December 2024
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/ica.v17i2.37146

Abstract

Lead (II) metal is a heavy metal that has high toxicity and is easily decomposed, causing long-term adverse effects on the environmental and human health. Therefore, it is important to develop a separation method to effectively detect lead (II) metal ions in water so that it can reduce adverse effects on humans, organisms and aquatic biota. Lead ion imprinted polymer (Pb-IIP) was developed to detect Pb(II) metal ions in water. The commonly used polymerization methods are bulk and precipitation polymerization, therefore this study aims to determine the effectiveness of the adsorption ability of Pb(II) metal ions in water using bulk polymerization and precipitation polymerization methods. The IIP was successfully prepared using Pb(NO3)2 as a template, methacrylic acid (MAA) as a functional monomer, ethylenegycoldimethacrylate (EGDMA) as a crosslinker, benzoyl peroxide (BPO) as an initiator and etylenediaminetetraacetic acid (EDTA) as a chelating ligand. Based on the study, the IIP polymerization method using precipitation polymerization produces adsorbents that have good quality, high adsorption capacity and small particles even though both methods are selective for Pb(II) metal ions. The adsorption capacity of precipitation polymerization is (56,23 mg/g) and the adsorption capacity of bulk polymerization is (46,24 mg/g).
Effect of Extraction Temperature of Molecularly Imprinted Polymer in Chloramphenicol Adsorption using UV-Vis Spectrophotometry Based on Diazotation Reaction Oktaningtias, Eka Faradila; Sianita, Maria Monica
Jurnal Pijar Mipa Vol. 20 No. 1 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i1.8001

Abstract

Chloramphenicol is an antibiotic commonly used in aquaculture. The overuse of antibiotics poses a danger. CAP will precipitate, and the residue will accumulate in the human body, threatening human health. Efforts are made to make media to overcome the CAP problem, one of which is the manufacture of molecularly imprinted polymers. The characteristic of this polymer is a mould or template that is reacted during synthesis and then withdrawn in the extraction process to form a selective mould. One factor that affects extraction is temperature. This study aimed to determine the effect of extraction temperature on chloramphenicol adsorption. The polymerisation was carried out using the precipitation polymerization method, and extraction was done using the batch method. The test used diazotation-based Uv-Vis spectrophotometry. The temperatures used were 60,70 and 80℃, which resulted in extraction percentages of 75.64%, 89.63% and 74.08%, respectively. For the adsorption process, the concentration variation for each MIP was 10, 25, 50, 75 and 100 ppm. Higher concentrations resulted in more adsorption, but the 100 ppm concentration decreased. The test showed that temperature affected the extraction and CAP adsorption results. Polymer characterisation was carried out with FTIR Polymer NIP results showing the presence of NO2 groups characteristic of CAP found at wave numbers 1536 cm-1 and 1322 cm-1. In MIP, there is an Imprinting Factor (IF). The IF value obtained is more than 1, so it can be said that the moulding results are good.
Optimization of pH Conditions for Lead Adsorption using Ion-Imprinted Polymer (IIP) with EDTA as Ligand Permatasari, Yuliani; Sianita, Maria Monica
Indonesian Journal of Chemical Analysis (IJCA) Vol. 8 No. 1 (2025): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol8.iss1.art3

Abstract

Ion-imprinted polymers (IIPs) are selective adsorbents for heavy metal removal. In this study, IIPs were synthesized using Pb²⁺ as a template, EDTA as a ligand, methacrylic acid (MAA) as a monomer, and ethylene glycol dimethacrylate (EGDMA) as a crosslinker via precipitation polymerization in an ethanol-acetonitrile mixture with benzoyl peroxide (BPO) as an initiator at 70°C. FTIR analysis confirmed the successful synthesis of IIPs by identifying Pb-O vibrations at 530.1 cm⁻¹ in the non-imprinted polymer (NIP), which disappeared in IIP after Pb²⁺ removal. SEM-EDX analysis showed IIP had more voids than NIP due to Pb²⁺ removal, with decreased Pb content from 1.85% to 0.18%. Adsorption was tested at pH 4–9, a 30-minute contact time, and an initial Pb²⁺ concentration of 50 ppm. The optimum pH was 7, with an adsorption capacity of 47.52 mg/g and a percentage recovery of 97.3%. This method offers higher selectivity, stability, and reusability due to the polymer matrix's specific Pb²⁺-imprinted cavities than other adsorption methods. Adsorption occurred via electrostatic interactions and complex formation. These results demonstrate that IIPs are effective for Pb²⁺ removal, offering a promising solution for heavy metal pollution treatment.
Ionic liquid ultrasound-assisted extraction (IL-UAE) for duck feather keratin and in silico evaluation as a potential procollagen n-endopeptidase inhibitor Sianita, Maria Monica; Kusumawati, Nita; Asri, Mahanani Tri; Dzulkarnain, Shod Abdurrachman; Al Hafidl, Achmad Naufal; Kahfi, Ashabul; Nabila, Mutiara Azfa; Setiawan, Ferdiansyah; Isyrak, Luthfiyah; Rahmawati, Khofifatul
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1669

Abstract

This research aims to optimize keratin extraction from duck feathers using an eco-friendly ionic liquid-ultrasound-assisted extraction (IL-UAE) method and evaluate its potential applications in tissue engineering. It investigated the effects of deposition pH (1-6), ultrasonication temperature (40-60°C), and time (60-180 min) on extraction yield and physicochemical properties. The results demonstrated the optimal extraction conditions at pH 3, 40°C, and 60 minutes, yielding 82% keratin with a 0.50 mg/mL concentration, while the lowest yield production was found at pH 6 (33%, 0.20 mg/mL). Meanwhile, characterization via FTIR confirmed predominant ?-sheet structures with characteristic peaks at 3250-3300 cm?¹ (N-H/O-H stretching) and 1700-1500 cm?¹ (C=O stretching). SDS-PAGE revealed pure keratin bands (10-15 kDa), while SEM showed layered, porous morphology suitable for biomaterial applications. Thermogravimetric analysis, furthermore, identified three degradation stages occurred at 0-200°C (3.05% loss), 200-400°C (39.37% loss), and 400-700°C (31.13% loss). Amino acid profiling revealed high L-cystine content (153,064.90-156,926.33 mg/kg) with the significant amounts of glycine (63,958.25-64,064.73 mg/kg), L-proline (77,631.16-77,717.42 mg/kg), and L-leucine (59,111.43-59,198.60 mg/kg). In silico molecular docking studies identified leucine as a promising procollagen N-endopeptidase inhibitor (binding energy -5.0 kcal/mol), which controlled the collagen-breaking and forming process. This ability makes keratin potential to be developed as a scaffold for bone tissue regeneration in medical industry.
Co-Authors Al Hafidl, Achmad Naufal Ashabul Kahfi, Ashabul Asrul Bahar Auliya, AR. Sella Dzulkarnain, Shod Abdurrachman Hayu Anggraini, Hayu Anggraini Isyrak, Luthfiyah Khafidlah, Ianatul Mahanani Tri Asri Nabila, Mutiara Azfa Nita Kusumawati Oktaningtias, Eka Faradila Permatasari, Yuliani Pirim Setiarso Rahmawati, Khofifatul Samik Samik Setiawan, Ferdiansyah Supari Muslim