Scholarlink

<p>A mixed-mode solar dryer (direct/50% mesh shade) was used to evaluate the impact of solar drying on the physicochemical properties and bioactive compounds of avocado leaves (<i>Persea americana</i> var. drymifolia). Also, oven drying at 50&#xa0;°C and open sun drying were performed. Fresh avocado leaves moisture was 55.6% and water activity 0.96. Color parameters were as follows: lightness (<i>L*</i>) 31.12, <i>a*</i> −7.91, <i>b</i>* 11.45, <i>chroma</i> 5.10 and <i>hue angle</i> 124.63°. The flavonoid content was 5.26&#xa0;mg QE/g db (quercetin equivalents/g dry basis), total phenols 27.57&#xa0;mg GAE/g db (gallic acid equivalents/g dry basis), ascorbic acid 62.79&#xa0;mg/100&#xa0;g, and antioxidant activity of 92.32%. After drying antioxidant activity remained unchanged (89.04 to 94.27% <i>p</i> &gt; 0.05). Flavonoids decreased (1.04–2.71&#xa0;mg QE/g db, <i>p</i> &lt; 0.05), and total phenols showed an increase with the open sun, oven, and mesh shade solar drying (28.53–30.88&#xa0;mg GAE/g db <i>p</i> &lt; 0.05). Ascorbic acid was better preserved with mesh shade solar drying (52.71&#xa0;mg/100&#xa0;g). Mesh shade drying described the least color difference (ΔE = 6.98). Page model better described the drying kinetics with an R² ≥ 0.994. The study suggests that solar drying effectively preserves bioactive compounds in avocado leaves, offering an alternative for food and pharmaceutical use.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of solar drying techniques for preserving avocado leaves (Persea americana): physicochemical and bioactive compound analysis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月15日

查看全文
  • Paulina Guillen-Velázquez,
  • Alfredo Domínguez-Niño,
  • Andrea Paola Hernández-Maya,
  • Margarita Castillo-Téllez,
  • Octavio García-Valladares

摘要

A mixed-mode solar dryer (direct/50% mesh shade) was used to evaluate the impact of solar drying on the physicochemical properties and bioactive compounds of avocado leaves (Persea americana var. drymifolia). Also, oven drying at 50 °C and open sun drying were performed. Fresh avocado leaves moisture was 55.6% and water activity 0.96. Color parameters were as follows: lightness (L*) 31.12, a* −7.91, b* 11.45, chroma 5.10 and hue angle 124.63°. The flavonoid content was 5.26 mg QE/g db (quercetin equivalents/g dry basis), total phenols 27.57 mg GAE/g db (gallic acid equivalents/g dry basis), ascorbic acid 62.79 mg/100 g, and antioxidant activity of 92.32%. After drying antioxidant activity remained unchanged (89.04 to 94.27% p > 0.05). Flavonoids decreased (1.04–2.71 mg QE/g db, p < 0.05), and total phenols showed an increase with the open sun, oven, and mesh shade solar drying (28.53–30.88 mg GAE/g db p < 0.05). Ascorbic acid was better preserved with mesh shade solar drying (52.71 mg/100 g). Mesh shade drying described the least color difference (ΔE = 6.98). Page model better described the drying kinetics with an R² ≥ 0.994. The study suggests that solar drying effectively preserves bioactive compounds in avocado leaves, offering an alternative for food and pharmaceutical use.