DETERMINATION of SHELF LIFE of CHASTE TREE (Vitex agnus castus) and PINE HONEYDEW (Marchalina hellenica) HONEYS

Year 2017, Volume: 42 Issue: 5, 577 - 587, 10.08.2017

Aytül Uçak Koç , Mete Karacaoğlu Hilal Nadeem Şahin Mustafa Doğan

Abstract

Chaste tree
and pine honeys were bought from three different producers (natural) and three local
markets (commercial). The honey samples were stored for 30 months at room
temperature. The shelf life of the samples was estimated for indices of HMF and
diastase activity. The values for HMF formation and diastase deactivation fitted
to a zero-order reaction.  The highest rate
of HMF formation was observed in the chaste tree honey as 2.674±0.013 mg/kg/month
while the least value was observed in the pine honey as 0.435±0.037 mg/kg/month.
The maximum diastase deactivation was determined in the natural chaste tree honey
as 0.613±0.000 DU/kg/months and the minimum was 0.318±0.002 DU/kg/month for the
commercial chaste tree sample. In terms of HMF, all honeys except commercial chaste
tree honey, have exhibited longer shelf life than 30 months of storage. The
results showed that the shelf life of the commercial honeys depend on the botanical
origin, pH, electrical conductivity, temperature and storage. 

Keywords

Chaste tree, shelf life, HMF, diastase, pine honey, diastase

HAYIT (Vitex agnus castus) ve ÇAM BALININ (Marchalina hellenica) RAF ÖMRÜNÜN BELİRLENMESİ

Abstract

Hayıt ve
çam balları üç farklı üretici (doğal) ve üç farklı yerel marketten (ticari)
satın alınmış ve bal örnekleri 30 ay oda sıcaklığında depolanmıştır. Bal
örneklerinin raf ömrü HMF miktarı ve diastaz aktivite indeksleri üzerinden
tahmin edilmiştir. HMF oluşumu ve diastaz deaktivasyonu sıfırıncı dereceden kinetik
modele uyumlu bulunmuştur. En yüksek HMF oluşum hızı hayıt ballarında
2.674±0.013 mg/kg/ay olarak hesaplanırken en düşük hız çam balında 0.435±0.037
mg/kg/ay olarak belirlenmiştir. Diastaz sayısı bakımından ise, en yüksek (0.613±0.000
DU/kg/ay) ve en düşük (0.318±0.002 DU/kg/ay) deaktivasyon hızı doğal ve ticari hayıt
ballarında belirlenmiştir. Balların 30 ay depolanması sonunda HMF bakımından
ticari hayıt balı hariç diğer tüm ballar daha uzun raf ömrüne sahip olmuştur.
Bu sonuçlar ticari balların raf ömrünün botanik orjin, pH, elektriksel
iletkenlik, sıcaklık ve depolamaya bağlı olduğunu göstermektedir. 

Keywords

HMF, raf ömrü, diastaz, Hayıt balı, çam balı, diastaz

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