Quality characteristics of frozen horse mackerel (Trachurus trachurus) treated with starch–glycerol coatings containing plant extracts

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Gurdal A. A., Çağlak E.

SCIENTIFIC REPORTS, ss.1-11, 2026 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1038/s41598-026-78545-8
  • Dergi Adı: SCIENTIFIC REPORTS
  • Derginin Tarandığı İndeksler: Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Health Research Premium Collection (ProQuest), Scopus, Science Citation Index Expanded (SCI-EXPANDED), BIOSIS, Chemical Abstracts Core, EMBASE, MEDLINE, Directory of Open Access Journals, Zoological Record
  • Sayfa Sayıları: ss.1-11
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

Starch-based coatings are biodegradable food-contact materials, but their performance depends on plasticizer

level, incorporated active compounds, and the food surface to which they are applied. This study developed

starch-glycerol polysaccharide coating formulations containing aqueous extracts from persimmon fruit calyces,

cherry laurel leaves, and bilberry/likapa leaves and evaluated their application to whole horse mackerel

(Trachurus trachurus) during frozen storage at -20 ± 2 °C for 6 months. Extract-level antioxidant activity was

determined by the DPPH assay and expressed as percentage inhibition and Trolox equivalent antioxidant capacity.

Comparable starch-glycerol films containing the same plant extracts had previously been characterized by

Gurdal and Caglak and were used here only as formulation-characterization background. During frozen storage,

TVB-N values increased but remained below 35 mg/100 g in all groups. Lipid oxidation responses were

formulation-dependent: the lowest final TBA values were observed in PA and PB, whereas BA and VC showed

the highest final values. pH, water activity, color, texture, and microbial results varied among treatments and

storage months without supporting a uniform concentration-dependent response. The findings suggest that

selected starch-glycerol formulations containing plant extracts may help modulate lipid oxidation and quality

changes in frozen horse mackerel. However, the absence of a plain starch-glycerol-coated fish control, coatinguptake

measurements, compound-level extract characterization, and composite-film antioxidant testing limits

direct attribution of the observed effects to specific bioactive mechanisms.