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All Journal Indonesian Journal of Chemistry Halal Research Journal Journal of Fundamentals and Applications of Chemical Engineering
Sari, Citra Yulia
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Religion Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering

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Comparative Study of DNA Extraction Methods for Halal Food Testing: Advantages, Disadvantages, and Recommended Methods Sari, Citra Yulia; Pamungkasa, Raditya Yudhi; Gunawan, Setiyo
Halal Research Vol 5 No 2 (2025): July
Publisher : Halal Center ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j22759970.v5i2.1734

Abstract

Identification of the halal status of food is a crucial aspect of the food industry, particularly in countries with a majority Muslim population. DNA extraction methods play a critical role in ensuring the halal status of food products by accurately detecting nonhalal substances. This study conducted a comparative evaluation of various DNA extraction methods used in halal food testing. We reviewed several DNA extraction methods listed in RSNI3 ISO 21571:2005 titled "Analytical Methods for the Detection of Genetically Engineered Products and Their Derivatives—Nucleic Acid Extraction". In RSNI3 ISO 21571:2005, five DNA extraction methods are discussed: the phenol-chloroform method, the silica method, the CTAB method, the polyvinylpyrrolidone (PVP) method, and the guanidine chloroform method. This study analyzes the advantages and disadvantages of the literature review. Additionally, we conducted an economic and process effectiveness review to identify the best method. Based on this analysis, we recommend the most suitable method for testing the halal status of various types of food sample. The results of this study are expected to serve as a guideline for testing laboratories and the food industry in selecting the optimal DNA extraction method for ensuring efficient and accurate halal status of products.
Sustainable Synthesis of Bacterial Cellulose Nanocrystals from Glucomannan-Based Bacterial Cellulose Widjaja, Tri; Nurkhamidah, Siti; Ni’mah, Hikmatun; Wardhono, Endarto Yudo; Rohmah, Aisyah Alifatul Zahidah; Tirta, Anggi; Nailah, Rossesari; Sari, Citra Yulia
Indonesian Journal of Chemistry Vol 25, No 5 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99360

Abstract

Bacterial cellulose (BC), derived from glucose fermentation, is a renewable material known for its abundant availability, quick production, cost-effectiveness, and eco-friendly characteristics. This study focuses on converting BC into BC nanocrystals (BCNC) via fermentation, hydrolysis using acid solutions, and ultrasonication. Glucomannan flour with concentrations of 50, 60, and 90% was fermented using Acetobacter xylinum for 10 days at pH 5 to produce BC. The BC was then hydrolyzed with HCl solutions at 1, 2, 3, 4, and 5 M concentrations, followed by sonication. The 90% glucomannan flour yielded the highest BC amount (22.61 g). BCNC hydrolyzed with 1 M HCl exhibited the highest crystallinity (86%) and an elongated rod-like morphology. In contrast, hydrolysis with 4 and 5 M HCl caused carbonization, reducing crystallinity to below 30%. Particle size analysis showed the largest particle size for BCNC-2 (549.4 nm) and the smallest for BCNC-5 (207.2 nm). This research highlights the potential of glucomannan as a resource to produce BCNC for sustainable materials for various applications.
Characterization of Poly Lactic Acid (PLA) Based on PEG-200 Modification of Clay-CaCO3 as Subtitution to LDPE Coating Paper Rohmah, Aisyah Alifatul Zahidah; Widjaja, Tri; Sari, Citra Yulia; Fajrin, Alifah Nur Aini
Journal of Fundamentals and Applications of Chemical Engineering Vol 6, No 1 (2025)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2964710X.v6i1.23018

Abstract

Plastics play a central role in daily life due to their lightweight nature, mechanical strength, low cost, and durability. Nevertheless, their environmental impact is significant, as they contribute to pollution and global warming. Polylactic Acid (PLA) has gained attention as a biodegradable alternative to conventional LDPE plastics. Although environmentally friendly, PLA exhibits inherent limitations such as brittleness and insufficient toughness, which restrict its broader application. To overcome these drawbacks, plasticizers like Polyethylene Glycol (PEG) 200 and reinforcing agents such as clay and calcium carbonate (CaCO₃) are added to enhance its mechanical performance. This research aims to investigate how these additives affect the resulting film properties. The bioplastic film was produced using a solvent casting method with chloroform as the solvent. The mixture was stirred at ambient temperature for six hours, then cast in a single step into a closed mold and allowed to rest overnight to form a film. The resulting film had a white appearance, slight transparency, and a smooth, slippery surface. Compared to films produced using a layered pouring approach, those formed via the one-pour technique exhibited superior thickness and mechanical strength. To characterize the effects of the additives, several analytical methods were employed: X-Ray Diffraction (XRD) to analyze crystallinity, Thermogravimetric Analysis (TGA) to assess thermal stability, Fourier Transform Infrared Spectroscopy (FTIR) to identify functional groups and chemical bonds, and Dynamic Mechanical Analysis (DMA) to determine mechanical properties such as tensile strength, Young’s modulus, and elongation at break. Surface morphology was further examined using Scanning Electron Microscopy (SEM). The most favorable results were observed in the composition containing 80% PLA, 10% PEG, 5% CaCO₃, and 5% clay. This formulation yielded a crystallinity of 96.71%, a decomposition temperature of 366.22 °C, elongation at break of 12.98%, Young’s modulus of 56.77 MPa, and a tensile strength of 1.25 MPa. These findings suggest that the film has strong potential as a coating material to replace LDPE.
Co-Authors Fajrin, Alifah Nur Aini Nailah, Rossesari Ni’mah, Hikmatun Pamungkasa, Raditya Yudhi Rohmah, Aisyah Alifatul Zahidah Rohmah, Aisyah Alifatul Zahidah Setiyo Gunawan Siti Nurkhamidah Tirta, Anggi Tri Widjaja Wardhono, Endarto Yudo Widjaja, Tri