The aim of this work was to assess the effect of several melanosis-inhibiting formulations on quality of deepwater pink shrimp (Parapenaeus longirostris) during storage. The formulations tested were as follows: one containing 4-hexylresorcinol (0.1%) in combination with organic acids (citric, ascorbic and acetic) and chelating agents (ethylenediaminetetraacetic acid [EDTA] and di-sodium di-hydrogen pyrophosphate [PPi]); a commercial formula based on sulphites (3%), and another formulation containing a mixture of chitosan (0.3%) and commercial sulphites. Non-treated shrimp were used as control. The 4-hexylresorcinol-based formulation was more effective than 3% of commercial sulphite solutions in preventing melanosis. This treatment prolonged the sensory acceptability of shrimp by up to six days in ice storage. During chilled storage, the treatment with the 4-hexylresorcinol-based formula inhibited the growth of microorganisms by 1.5–2 log cycles as compared to commercial sulphites, especially H₂S-producers and pseudomonads. At the end of the experimental period, TVB-N levels were slightly higher in the lot treated with 4-hexylresorcinol (33 mg/100 mg) and reflected greater endogenous enzymatic activity, since the counts of the spoiler microorganisms remained around log 5 cfu/g or even lower. In general, the incorporation of chitosan to sulphites did not improve or produce a marked effect on shrimps during storage. During the sensory analysis, the panellists rated all the lots very similar, although the 4-hexylresorcinol formulation was the only one with a neutral odour at the end of the period. The 4-hexylresorcinol-based formulation induced yellow-green colorations to some extent in the cephalothorax, possibly due to the effect of organic acids and chelants, while the rest of the lots presented greyish/blackish colorations. Therefore, the formulation based on 4-hexylresorcinol may safely substitute traditional sulphites to improve the quality of fresh shrimp and prolong their shelf life during storage.

这项工作的目的是评估几种抑制黑素病的制剂对深水粉红虾（Parapenaeus longirostris）。测试的制剂如下：一种包含4-己基间苯二酚（0.1％）与有机酸（柠檬酸，抗坏血酸和乙酸）和螯合剂（乙二胺四乙酸[EDTA]和焦磷酸二氢二钠[PPi]）的组合；以亚硫酸盐（3％）为基础的商业配方，以及另一种包含壳聚糖（0.3％）和商业亚硫酸盐的混合物的配方。未经处理的虾用作对照。基于4-己基间苯二酚的制剂在预防黑色素沉着方面比3％的商业亚硫酸盐溶液更有效。这种处理将虾在冰中的感觉接受时间延长了长达六天。在冷藏期间，与商业亚硫酸盐（尤其是H）相比，使用基于4-己基间苯二酚的配方进行的处理以1.5–2 log对数周期抑制了微生物的生长_2个S生产者和假单胞菌。在实验期结束时，TVB-N水平在用4-己基间苯二酚（33 mg / 100 mg）处理的批次中略高，并且反映出更大的内源酶活性，因为扰流微生物的数量保持在log 5 cfu /附近。 g甚至更低。通常，在贮藏过程中将壳聚糖掺入亚硫酸盐并没有改善或对虾产生显着影响。在感官分析中，小组成员对所有批次进行了非常相似的评估，尽管在期末只有4-己基间苯二酚制剂是唯一具有中性气味的制剂。基于4-己基间苯二酚的配方可能在某种程度上由于有机酸和螯合剂的作用在头胸部引起黄绿色着色，而其余批次呈现灰色/黑色着色。所以，