Page 16 - tech fest 2025 ב״ש חוברת תקצירים

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Development of Correlations for the Evaluation and Comparison of Yogurt Texture Using Different Testing Methods
ChE-B-07
Mervat Murad; mervatabu4@gmail.com
Advisors: Prof. Oshrat Ontman1, Ms. Zoya Grouz2 1SCE - Shamoon College of Engineering, Be’er-Sheva 2Tara Dairy, Noam Industrial Zone
The establishment of a reliable method for assessing yogurt texture at “Tara Dairy” during production and in the final product is crucial for quality control. The goal of this project is to identify the most accurate measurement technique by developing correlations between different texture evaluation methods. Four types of yogurts were tested. On production day (Day 0), viscosity was measured using a “Haake Viscotester,” flowability using a “Bostwick Consistometer,” and firmness using a Texture Analyzer. After 5 days of stabilization, firmness was measured again with the Texture Analyzer, representing the final consumer texture experience. Release of the product from the dairy is contingent on the result of the texture test after yogurt stabilization. Correlation analysis showed that the Texture Analyzer had the most accurate correlation for predicting stabilized texture.
Keywords: firmness, quality control, sensory evaluation, stabilization, texture monitoring
Assessment of TextiMag Efficiency in Preventing Bacterial Growth and Odor in Textiles
ChE-C-01
Shahar Turgeman; shahartu14@gmail.com
Advisors: Prof. Oshrat Ontman1, Dr. Ella Rapaport2 1SCE - Shamoon College of Engineering, Be'er-Sheva 2ICL IP - Bromine Compounds Ltd
This study examines TextiMag’s ability to provide antibacterial and odor-absorbing properties to treated textiles. The goal was to develop a stable dispersion for textile finishing, resulting in bacteria- resistant, odor-absorbing fabrics. Three key variables were tested: surfactant; fabric types (cotton, polyester and 50/50 cotton/polyester blend); and the concentration of active agent on the fabric (3%, 5% and 9%). Antibacterial testing followed. AATCC 100-2019 with Staphylococcus aureus (ATCC 6538) demonstrated reduced bacterial counts over time in all treated fabrics compared to untreated samples. In addition, odor absorption was assessed using ISO 17299-3:2014 (method A) and gas chromatography to compare odor concentration before and after exposure. Results showed that TextiMag was an effective solution for creating antibacterial, odor-absorbing textiles.
Keywords: AATCC 100-2019, antibacterial, antimicrobial treatment, fabrics, odor reduction, Staphylococcus, textiles, Textimag