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<p>This study investigated the impact of high-pressure homogenization (HPH) and ultrasound (US) pretreatments on the drying behavior, physicochemical properties, and phytochemical stability of tamarillo (<i>Solanum betaceum</i> ) puree powder. Fresh tamarillo puree was subjected to ultrasound treatment for 10&#xa0;min or high-pressure homogenization at 750&#xa0;bar prior to drying, and the resulting powders were evaluated for drying kinetics, moisture diffusivity, physical properties, bioactive compounds, antioxidant activity, and storage stability. Pretreatment of tamarillo puree using ultrasound and high-pressure homogenization significantly improved drying efficiency by increasing effective moisture diffusivity. The highest diffusivity was observed in HPH-treated samples (1.13 × 10⁻⁸ m²/s), followed by ultrasound-treated samples, while the untreated control showed the lowest value. Among the five drying models evaluated, the Avhad and Marchetti model best described the drying behaviour. Both pretreatments enhanced powder quality, resulting in higher particle density, improved solubility, better wettability, and superior colour attributes due to disruption of the cellular structure and increased porosity. Phytochemical analysis showed that HPH-treated powders contained the highest levels of total phenolics, flavonoids, carotenoids, and antioxidant activity, whereas ultrasound treatment led to the greatest retention of vitamin C. Raman spectroscopy confirmed higher carotenoid intensity in pretreated powders, particularly in HPH-treated samples. During 150 days of storage, the HPH-treated powder exhibited temperature-dependent degradation, with the greatest losses at 25&#xa0;°C, while refrigerated and frozen storage preserved bioactive compounds more effectively. The results suggest that HPH is a suitable pretreatment for producing high-quality tamarillo powder.</p>

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Influence of Pre-Treatments (High-Pressure Homogenization and Ultrasound) on the Phytochemical Characteristics of Tamarillo Puree Powder

  • 期刊论文

  • 发表日期：

    2026年4月7日

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  • Shubham Rohilla,
  • Jinku Bora,
  • Charu Lata Mahanta

摘要

This study investigated the impact of high-pressure homogenization (HPH) and ultrasound (US) pretreatments on the drying behavior, physicochemical properties, and phytochemical stability of tamarillo (Solanum betaceum ) puree powder. Fresh tamarillo puree was subjected to ultrasound treatment for 10 min or high-pressure homogenization at 750 bar prior to drying, and the resulting powders were evaluated for drying kinetics, moisture diffusivity, physical properties, bioactive compounds, antioxidant activity, and storage stability. Pretreatment of tamarillo puree using ultrasound and high-pressure homogenization significantly improved drying efficiency by increasing effective moisture diffusivity. The highest diffusivity was observed in HPH-treated samples (1.13 × 10⁻⁸ m²/s), followed by ultrasound-treated samples, while the untreated control showed the lowest value. Among the five drying models evaluated, the Avhad and Marchetti model best described the drying behaviour. Both pretreatments enhanced powder quality, resulting in higher particle density, improved solubility, better wettability, and superior colour attributes due to disruption of the cellular structure and increased porosity. Phytochemical analysis showed that HPH-treated powders contained the highest levels of total phenolics, flavonoids, carotenoids, and antioxidant activity, whereas ultrasound treatment led to the greatest retention of vitamin C. Raman spectroscopy confirmed higher carotenoid intensity in pretreated powders, particularly in HPH-treated samples. During 150 days of storage, the HPH-treated powder exhibited temperature-dependent degradation, with the greatest losses at 25 °C, while refrigerated and frozen storage preserved bioactive compounds more effectively. The results suggest that HPH is a suitable pretreatment for producing high-quality tamarillo powder.