Browsing by Publisher "Plapiqui"

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    QUALITY PARAMETERS AND DRYING KINETICS OF ULTRASOUND PRETREATED FERMENTED BLACK TABLE OLIVES
    (Plapiqui, 2020) AYDAR A.Y.
    Abstract−− The effect of ultrasound (US) pretreatment on microwave drying parameters including drying rate, moisture ratio and effective diffusivity and quality properties such as total phenolic and color parameters (L*, a*, b*, C, ΔE and H°) of black table olive slices were determined. 10 minutes ultrasound pretreatment decreased drying time of black table olive slices by 31.81%, 41.37% and 42.85% compared to control samples dried at 180, 450 and 800 W, respectively. Weibull and Diffusion models could precisely fit the drying behavior of black table olive slices (R2 > 0.9950). Microwave drying had a negative effect on phenolic compounds of olives, whereas US pretreatment preserved phenolics and color parameters of samples. Higher effective diffusivity (Deff) values were obtained when the drying was combined with US pretreatment. Microwave drying with ultrasound pretreatment could improve drying process, since it accelerated drying rate and preserved the phenolic compounds and color parameters. © 2020
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    EFFECT OF ULTRASOUND PRE-TREATMENT ON DRYING KINETICS AND QUALITY PROPERTIES OF JERUSALEM ARTICHOKE
    (Plapiqui, 2022) Aydar A.Y.; Mataraci C.E.; Sağlam T.B.; Yilmaz T.
    Jerusalem artichoke (Helianthus tu-berosus L.) is primarily used as a biomass for ethanol production. It is also utilized for human consumption as a healthy snack by having good nutritional value and inulin content. In this study, ultrasound pre-treatment (USPT) was selected to minimize drying de-fects and 5, 10, and 15 min. treatments were applied before hot air drying at 60 °C and 80 °C. The effect of pre-treatment on drying performances and proper-ties including color, total phenolic content and total antioxidant were investigated. Effective diffusion co-efficient values ranged from 1.72 × 10-8 m2/min to 2.94 × 10-8 to m2/min, and it was observed that the effective moisture diffusion coefficient was higher in the sam-ples where ultrasound was applied compared to the control sample. L * value 72.72 ± 2.71 was found high-est at samples that were 5 minutes ultrasound treated and dried at 60 °C for 60 minutes. The highest antiox-idant and phenolic content in the drying process at 60 °C was determined in the samples where ultrasound was applied for 15 minutes. As a result, the applica-tion of USPT can result in a better conserved quality in a shorter drying time with the required final prod-uct moisture content © 2022, Latin American Applied Research.All Rights Reserved.
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    EFFICIENT EXTRACTION OF CURCUMIN FROM TURMERIC WITH PHARMACEUTICAL SOLVENTS AND OPTIMIZATION USING RESPONSE SURFACE METHODOLOGY
    (Plapiqui, 2023) Raheem M.; Ahmed D.; Aydar A.Y.
    The aim of the study was to find out a novel, effective, safe, and eco-friendly method for the extraction of curcumin from turmeric. A pharmaceu-tically safe solvent isopropyl alcohol was selected based on preliminary screening. Three methods, mi-crowave-assisted extraction (MAE), ultrasound-as-sisted extraction (UAE), and maceration were ex-plored, and optimization of each method was per-formed using Box-Behnken design with RSM. Yield (mg/g) ranged from 1.35-12.53, 1.43-5.59, and 0.23-7.06 (mg/g) in MAE, UAE, and maceration, respec-tively. For MAE, optimum conditions were 30 mL/g solvent-to-solid ratio (SSR), 240 W microwave power, and 40 s extraction time. The optimum UAE condi-tions were 40 °C, 10 min and 50 mL/g SSR. The opti-mum conditions for maceration were 60 °C, 90 min and 10 mL/g SSR. Based on the results, MAE was the most robust technique for extraction of curcumin from turmeric and the protocol may be developed for industrial application © 2023, Latin American Applied Research.All Rights Reserved.