The effect of drying on two brown seaweed (Treptacantha abies-marina and Cystoseira humilis) and two red seaweed species (Asparagopsis armata and Asparagopsis taxiformis) was evaluated based on the levels of biological activity, such as antioxidant and anti-inflammatory properties. Moreover, the contents of some significant compound classes, such as polyphenols and beta-glucans, were determined. Seaweeds C. humilis and T. abies-marina showed high polyphenol levels (1.76–6.78 mg gallic acid equivalents g⁻¹ dw), which clearly exceeded those determined in the Asparagopsis genus regardless of drying process. This was partially reflected in the antioxidant activity as measured by DPPH and FRAP methods, which showed that extracts from C. humilis and T. abies-marina in most cases had stronger antioxidant activity than those from Asparagopsis species. The influence of the drying technique upon the antioxidant activity was relatively limited, since in many instances there was no effect. Concerning anti-inflammatory activity, in the case of shade-dried samples, C. humilis had a higher activity (>30% COX-2 inhibition) than A. armata. However, this activity in C. humilis was not rendered available in the upper gastrointestinal (GI) tract. Indeed, only A. taxiformis displayed anti-inflammatory activity in the fraction available in the upper GI tract, showing an upper GI tract availability in the 90–100% range. Therefore, though bioactivity levels were higher in C. humilis and T. abies-marina, Asparagopsis species also had substantial levels of bioactive compound. Sun-drying produced more negative effects than shade-drying, but these effects were not very extensive.

中文翻译：

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干燥对被低估的棕色和红色海藻物种的影响：生物活性改变

根据生物活性水平，例如抗氧化和抗炎特性，评估了干燥对两种棕色海藻（Treptacantha abies-marina和Cystoseira humilis）和两种红色海藻（Asparagopsis armata和Asparagopsis taxformis）的影响。此外，还确定了一些重要化合物类别的含量，例如多酚和 β-葡聚糖。海藻C. humilis和T. abies-marina显示出高多酚水平（1.76–6.78 mg 没食子酸当量 g ^-1 dw），这明显超过了Asparagopsis 中确定的水平无论干燥过程如何。这部分反映在通过 DPPH 和 FRAP 方法测量的抗氧化活性上，这表明在大多数情况下，来自C. humilis和T. abies-marina 的提取物比来自Asparagopsis物种的提取物具有更强的抗氧化活性。干燥技术对抗氧化活性的影响相对有限，因为在许多情况下没有影响。关于抗炎活性，在阴干样品的情况下，C. humilis具有比A. armata更高的活性（> 30% COX-2 抑制）。然而，这种在C. humilis中的活性在上消化道 (GI) 中不可用。确实，只有A.taxiformis在上消化道可用的部分显示出抗炎活性，显示上消化道的可用性在 90-100% 范围内。因此，尽管生物活性水平在较高C.蒿草和T.冷杉-码头，Asparagopsis物种也有生物活性化合物的显着水平。晒干比阴干产生更多的负面影响，但这些影响不是很广泛。