Taze Kesilmiş Pırasada Askorbik Asit Uygulamasının Soğukta Depolama Boyunca Kalite Değişimine Etkisi

Year 2023, Volume: 20 Issue: 1, 134 - 144, 19.01.2023

Bekir Gülal , Mehmet Ali Koyuncu

https://doi.org/10.33462/jotaf.1070629

Cited By: 2

Abstract

Çalışmada askorbik asit (AA) uygulamasının taze kesilmiş ‘Lincoln’ pırasa çeşidinin soğukta depolama boyunca kalitesi üzerine etkileri incelenmiştir. Optimum dönemde derimi yapılan pırasalar hızlı bir şekilde laboratuvara nakledilmiştir. Pırasalar zorlanmış hava ile (2 °C) 6 saat süreyle ön soğutma işlemine tabi tutulduktan sonra uygulamalar (kontrol, %1 ve %2 AA) için üç gruba ayrılmıştır. Ön soğutma işleminden sonra pırasalar serin ve steril koşullar altında 5-6 °C sıcaklıktaki çeşme suyuna birkaç kez daldırarak bahçe kaynaklı toz ve kalıntılar uzaklaştırılmıştır. Taze kesim işleminden sonra %1 ve %2 AA uygulanmış pırasa örnekleriyle kontrol grubu köpük kâselere yerleştirilerek üzeri streç filmle (16 µ) kaplanmıştır. Ambalajlanmış pırasalar 0±1 °C ve %90±5 oransal nemde 30 gün boyunca depolanmıştır. Depolama boyunca altı gün aralıklarla pırasalarda ağırlık kaybı (%), yalancı gövde sertliği (N), suda çözünebilir kuru madde (%), titre edilebilir asitlik (g 100 ml-1), solunum hızı (ml CO2/kg‐1 h‐1), yalancı gövde rengi ve duyusal özellikler belirlenmiştir. AA uygulamaları kontrole kıyasla taze kesilmiş pırasalarda ağırlık kayıplarını azaltmıştır. Depolama boyunca %2’lik doz daha etkili olmak üzere, AA uygulamaları yalancı gövde sertliğini kontrole göre daha iyi korumuştur. Soğukta depolama boyunca AA uygulamaları taze kesilmiş pırasaların TEA miktarını korumuş ve solunum hızını net bir şekilde baskılamıştır. AA uygulamaları kontrol örneklerine kıyasla depolama süresince pırasaların görsel kalitelerini daha iyi korumuştur. Sonuç olarak, AA uygulanmayan kontrol grubundaki pırasalar 0±1 °C ve % 90±5 oransal nemde 24 gün depolanabilirken, her iki AA (%1ve %2) uygulaması bu süreyi 30 güne kadar uzatmıştır. Ancak farklı doz ve uygulama şekilleri kullanılarak bu konuda daha detaylı çalışmalara ihtiyaç vardır.

Keywords

Allium porrum, Taze kesme, Askorbik asit, Kalite, Depolama

The Effect of Ascorbic Acid Treatment on The Quality Changes of Fresh-Cut Leek During Cold Storage

Abstract

In the present research, the effects of ascorbic acid (AA) treatments on the quality of fresh-cut leek cv. ‘Lincoln’ during cold storage were investigated. Leek samples, harvested at optimum stage, were immediately transferred to the laboratory. Leek samples were pre-cooled with forced air (2 °C) for 6 hours and divided into three groups for treatments (control, 1% and 2% AA). After pre-cooling, dust and residues on leeks originating from the orchard were removed by dipping into cold tap water (5-6 °C) under cool and sterile conditions. After fresh-cut processes, the AA treated (1% and 2%) and control samples were packaged in polystyrene foam tray covered with stretch film (16 µ). Packaged leeks were stored at 0 ± 1 °C and 90 ± 5% relative humidity (RH) for 30 days. The weight loss (%), pseudo stem firmness (N) total soluble solids (%), titratable acidity (g 100 ml‐1), respiration rate (ml CO2 kg‐1 h‐1), pseudo stem colour and sensory evaluation of leeks were performed at six day intervals during storage. The AA treatments decreased weight loss of fresh-cut leeks compared to control. The AA treatments, especially the 2% dose, preserved the pseudo stem firmness better than the control during storage. The AA treatments clearly suppressed respiration rate and maintained the TA of fresh-cut leek during cold storage. The AA treatments preserved the visual quality of the leeks better than the control samples during storage. As a result, it was determined that control group leeks could be stored for 24 days at 0 ± 1 ° C and 90 ± 5% (RH) but this period could be extended up to 30 days by AA (%1-2%) treatments. However, further detailed research on this topic considering different treatment type and dozes is required.

Keywords

Fresh-cut, Ascorbic acid, Quality, Storage

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