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Chilled pork was stored in the controlled atmosphere (95% of N2 and 5% of 02) and In the air at the temperature of 275 K (TC) for the period of 28 days. The aim of the research presented in this paper was to determine the effect of those two methods of chilled pork preservation on its sense,y quai,ty. The results of the investigation show that pork stored in the air for 15 days and in the controlled atmosphere for 25 days was characterized by similar sensory quality (including aroma, juiciness and payability). It was found that the taste quality of meat stored in the controlled atmosphere tor 5-20 days was good. After 25 days of storage, negative changes were observed in the desirability of aroma, juiciness and payability ot pork. After 30 days, the properties evaluated improved.
The investigation aimed at assessing the quality and storability of 'Golden Deli­cious' apples. The experiment was performed in two storage seasons (2006/2007 and 2007/2008). Fruit treated with 1-methylcyclopropene (1-MCP) and untreated fruit were stored at 1°C in normal atmosphere (NA), and in three combinations of con­trolled atmosphere (CA) with the gaseous composition of CO2:O2 - 1.5:1.5; 3.0:3.0; and 5.0:3.0. Fruit quality was assessed after 2, 4 and 6 months of storage; both imme­diately after storage and after 7 days of being kept at room temperature. In the ex­periment a drastic inhibition of the intensity of ethylene production in apples treated with 1 -MCP was noted, regardless of the conditions and the length of storage time. Treating fruit with 1-MCP as well as their storage in controlled atmosphere conditions resulted in higher flesh firmness of apples, both directly after storage and after 7 days at room temperature. In the first 4 months of storage the effect of 1 -MCP treatment on fruit quality was clearly more visible in NA than in CA. With the prolongation of storage time a constant decrease of titratable acidity in apples was observed. The rate of this process was significantly slower in the case of fruits stored in controlled atmosphere than in normal atmosphere. The differences between these storage technologies were even more visible after the shelf life than directly after storage. The post-harvest treatment of apples with 1-MCP, substantially limited the decrease of apple titratable acidity, especially under the NA conditions. Fungal diseases (grey mould rot, bull's eye rot and blue mould rot) occurred mostly on fruits stored in normal atmosphere. Treating apples with 1 -MCP usually decreased the per­centage of rotten fruits both directly after storage and after the shelf life period.
The objective of this research was to determine the influence of controlled atmosphere and controlled atmosphere with the addition of tea tree or cardamom essential oil on the kinetics of changes in vitamin C content, chlorophyll pigments and on the total number of microorganisms and anaerobic titre during storage of two cultivars of savoy cabbage: ‘OWASA’ and ‘WIROSA’. The cabbage was stored at 0–1°C under controlled atmosphere (CA) composed of 4% CO2, 3% O2 and 93% N2, in CA with the addition of tea tree oil (oil 1) or cardamom essential oil (oil 2) at the concentration of 15 ppm, and in the air (K). It was proved that, irrespective of the presence of an essential oil, CA slowed down the degradation of vitamin C and chlorophyll pigments in the stored vegetables. The controlled atmosphere prolonged the period when vegetables maintained their high biological value during cold storage. The tea tree essential oil added to CA improved the general microbiological quality of the stored cabbage, causing a reduction in the total number of microorganisms by two logarithmic units after 1–2 months of storage, while the cardamom essential oil decreased it by one logarithmic unit related to CA free from essential oil.
The study was carried out during the two storage seasons of 2008/2009 and 2009/2010. The subject of this study was the checking of the influence of the harvest dates being 4-days apart, and checking of the different storage conditions (CA 0.8% CO2:2% O2, CA 2% CO2:2% O2, CA 3% CO2:3% O2 and NA - normal atmosphere) on the selected quality parameters of 'Concorde' pears. The pears were first stored for 150 days in 0-0.5 oC. Once the fruit was out of the storage it was stored in simulated shelf-life conditions for an additional 7 days at a temperature of 17 oC. An evaluation of pear quality was conducted after each harvest date, after taking them out of the cold storage and after simulated shelf-life. Flesh firmness, soluble solids content and titratable acidity were determined, and pear health was evaluated. Harvest date had a significant impact on the maturity of fruit, and values of the investigated quality parameters of pears, during the harvest. During the subsequent harvests, the value of the starch index and soluble solids content in pears increased, whereas Streif's matur­ity index, flesh firmness and titratable acidity decreased. Harvest date and storage conditions also had a significant influence on the investigated qualitative attributes of pears determined after storage, and the simulated shelf-life period. Pears stored in controlled atmosphere conditions were firmer and had higher titratable acidity than fruit stored in common cold storage. Delay in the harvest date resulted in fast soften­ing of fruit, significant reduction of titratable acidity, and higher susceptibility to putrefaction caused most of all by the gloeosporium rot. A serious problem observed during long term storage of 'Concorde' pears was sensitivity to flesh damage caused by CO2, and high susceptibility to senescent scald.
Badania miały na celu porównanie zawartości azotanów(III) i (V) w szpinaku odmiany Sporter pakowany i przechowywanym w atmosferze modyfikowanej o różnym składzie. Surowiec do badań pochodził z uprawy jesiennej 2007 roku i późnowiosennej 2008 roku. Zawartość azotanów(V) w surowcu ze zbioru jesiennego była 2-krotnie wyższa niż w szpinaku wiosennym i wynosiła odpowiednio: około 1100 i 520 mg·kg-1. W próbach ze szpinaku jesiennego pakowanych w atmosferze modyfikowanej, niezależnie od jej składu, odnotowano niższą zawartość azotanów(V), w porównaniu z surowcem. Wynosiła ona od 875 do 1027 mg·kg-1 po 1 dniu przechowywania, dalsze przechowywanie spowodowało istotny spadek zawartości tych związków w większości badanych prób. Obecności azotanów(III) nie stwierdzono zarówno w surowcu ze zbioru jesiennego, jak i wiosennego. Natomiast w próbach zapakowanych w atmosferze modyfikowanej, niezależnie od jej składu, stwierdzono wzrost zawartości tych związków w czasie 12 dni przechowywania szpinaku.
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