Effect Of Packaging Conditions Research Articles

Effects of packaging conditions on some functional and sensory attributes of goose meat.

The objective of the work was to investigate the effect of modified atmosphere (MA) packaging (high oxygen modified atmosphere and vacuum) on pH, water holding capacity and cooking loss of raw goose meat, and on the sensory assessment and shear force of roasted meat. Samples refrigerated at 1°C were tested within 24 h after slaughter (unpacked meat) and on d 4, 7, 11, and 14 of storage (modified atmosphere or vacuum packed meat).The type of atmosphere used in packaging determined the functional properties of goose meat such as: pH, WHC, cooking loss and shear force. This is important from both the culinary and technological viewpoint. At the end of storage the meat packed in MA (consisting of 80% O2, 20%CO2) had higher cooking loss, lower pH values, and water holding capacity in comparison to samples stored in vacuum. The type of atmosphere influenced the sensory descriptors (characteristic odor and flavor, tenderness, juiciness and general evaluation) of roasted meat. Samples packed in MA did worse during sensory assessment with respect to odor and flavor, tenderness, juiciness and general assessment. Thus meat stored under modified atmosphere showed lower productivity and was less tender and juicy.The goose breast muscles packed in vacuum proved to be better suited for consumption and processing as compared to those packed in high oxygen MA.

46 Effects of Packaging Conditions on Volatile Compounds of Raw Beef from Two Muscles.

46 Effects of Packaging Conditions on Volatile Compounds of Raw Beef from Two Muscles.

Effect of packaging conditions on quality and shelf-life of fresh pointed gourd (Trichosanthes dioica Roxb.) during storage

Abstract Effect of packaging conditions on shelf-life quality of pointed gourd were studied during ambient (23–35 °C, 45–75% RH) and refrigerated (4–6 °C, 45% RH) storage. Six different packaging types i.e. modified atmospheric packaging (MAP) with low density polyethylene (LDPE) film, MAP with polypropylene (PP) film, MAP in LDPE-film with pin holes, MAP in PP-film with pin holes, shrink packaging with bi-axially oriented polypropylene (BOPP) film and vacuum packaging with PP-film techniques were used for experiment. Changes in headspace gas composition, physiological loss in weight (PLW), ascorbic acid, texture, colour and subjective quality of pointed gourd were evaluated periodically during storage. The in-pack modified gaseous composition created a suitable headspace with low O 2 and high CO 2 , which resulted in better retention of freshness and marketability of the vegetables in different packaging conditions. Shrink and vacuum packaging could not yield desired result under ambient storage because of high water vapour transmission rate (WVTR) of film and loss of turgidity. PLW of 5.56(±1.52) % was the highest in pointed gourd samples stored in ambient condition upto 4 th day of storage, whereas the least (0.34%) in pointed gourd packed with PP-film under refrigerated condition. MAP with PP-film in refrigerated condition was found significantly improved shelf-life of pointed gourd up to 16 days. Ambient conditions could extend shelf-life of pointed gourd up to 4 days using LDPE-film with pin holes. The outcome of the study will have great potential and recommended for fresh fruit and vegetable industry.

Effects of Two Different Modified Atmosphere Compositions on Durability of Steam-Cooked Rainbow Trout (Oncorhynchus Mykiss, Walbaum, 1792)

In this study, steamed rainbow trouts (Oncorhynchus mykiss, Walbaum, 1792) were packaged in modified atmosphere and stored at 4 ± 1C. Trouts were cooked under 100.2C steam heat for 20 min in the steam cooker. During packaging, three different gas mixtures as group K packaged with 100% air, group A including 60% CO2 − 40% N2 and group B including 60% N2 − 40% CO2, were used. Total volatile basic nitrogen, thiobarbituric acid, pH, microbiological (total mesophilic aerobic bacteria, total psychrophilic bacteria, total yeast – mold) and sensory analyses were carried out, and the effect of packaging conditions was investigated on the shelf life of steamed trout. Considering the results of the sensory analysis, the shelf life of steamed trout was determined as 19 days in the control group and 27 days in groups A (60% CO2 − 40% N2) and B (60% N2 − 40% CO2), respectively. Practical Application High demand for processed food nowadays is causing an increase in the number of performed studies related with processed food. While consumers are choosing processed food, they care about them being healthy and nutritious (processed food). In this study, the steaming method, which is indicated among healthiest cooking methods, was used. In addition, we aim to determine the shelf life of trout by using two different modified gas ratios. At the end of the study, it seemed that packaging in modified atmosphere extended the shelf life of steamed trout.

Effect of packaging conditions on shelf-life of fresh foal meat

The objective was to determine the shelf life of foal meat (Longissimus dorsi) stored in four different packages: (i) vacuum, (ii) overwrap and (iii) two modified atmospheres (MAP): high O2 MAP (80% O2+20% CO2) and low O2 MAP (30% O2+70% CO2) stored at 2°C during 14days. Shelf life evaluation was based on pH, colour, lipid and protein oxidation, microbial counts and sensory assessment of odour, colour and appearance. Based on aerobic bacterial counts, the shelf life of foal meat samples in overwrap and high O2 MAP packages would be 10days at most, almost 14days in low O2 MAP and more than 14days in vacuum packaging. Scores for sensorial evaluation were unacceptable after 10days of storage in samples in overwrap and MAP packs, but they were still acceptable in vacuum ones. Moreover, for all packaging conditions except vacuum, which remained constant, a decrease in redness (a*) and an increase in carbonyl content and TBAR'S values was observed with storage time. High O2 levels negatively affected foal meat quality, while anaerobic conditions extended shelf life to 14days.

Effect of Packaging Conditions on Physiology Quality and Shelf-Life of Fresh-Cut Kiwifruit

Impacts of packaging conditions on shelf-life quality of fresh-cut ‘Lushanxiang’ kiwifruit were investigated during 12 d of storage at 4 °C. Fruit slices were wrapped in 64 μm polypropylene (PP) film flushing with high CO2 (40% or 10%) atmosphere or passive modified atmospheres (air). Measurements of firmness, total phenolic content, chlorophyll and microbial growth were evaluated over time. Active packaging with the initial 10% CO2 plus 5% O2 was the most effective in maintaining flesh firmness, total phenolic and chlorophyll content, which was still 11N, 0.75 mg/mL and 0.09 mg/g respectively. Both 40% and 10% CO2 active modified packaging significantly inhibited the microbial grows. Further researches are needed to evaluate the sensory aspects, as well as to characterize the flesh translucency phenomenon of fresh-cut kiwifruits.

Effect of Packaging Conditions on the Shelf-life of Chicken Frankfurters With and Without Lactate Addition

Shelf-life of frankfurters depends on various factors such as its composition, packaging material and method used as well as the effect of external conditions (temperature). The objective of this study was to determine the shelf-life of packaged (vacuum, shrink and modified atmosphere, MA) chicken frankfurters during storage at different temperatures. For this purpose regular and with sodium lactate addition chicken frankfurters were produced. For MA packaging (MAP), under gas mixture of 70% N(2) and 30% CO(2), a package consisting of container and heat sealable cover was used. Different laminate composition was used for vacuum and shrink packaging of frankfurters. During frankfurters storage physico-chemical (pH, a(w)), and microbiological (aerobic mesophiles, lactic acid bacteria and total bacterial count) analyses were performed. Packaging materials were analyzed for their barrier characteristic (oxygen permeability). The shelf-life of frankfurters can be extended if packaged in MA (54 days) and shrink (45 days) packaging compared to 36 days of shelf-life in vacuum packaging, at 3 (°)C. Higher shelf-life is obtained for frankfurters with lactate addition, in all packaging conditions, stored at 6 (°)C.

Effect of Packaging Conditions on Shelf-Life of Mortadella Made with Citrus Fibre Washing Water and Thyme or Rosemary Essential Oil

The “elimination” of chemical additives used in a wide variety of foods is demanded, while “natural” additives are seen as a benefit for both quality and safety. Researchers are looking for new sources of ingredients and/or additives. The aim of this work was to study the effect of 1) the addition of 5.00% citrus fibre washing water (CFWW) and 0.02% rosemary essential oil (REO) or 0.02 % thyme essential oil (TEO) and 2) storage conditions on the chemical, microbe- ological and sensorial properties of mortadellas, a bologna-type sausage. CFWW + REO or CFWW + TEO samples stored in vacuum packaging showed the lowest TBA values. The resulting products were packed either in vacuum, modified atmosphere or air pouches and stored for 24 days. Lipid oxidation was assessed by the TBA method, while a quantitative descriptive analysis was carried out for sensory evaluation. Microbiological counts were also determined. CFWW + REO samples stored in vacuum packaging showed the lowest counts of aerobic and lactic acid bacteria. The sensory evaluation provided similar scores for CFWW + REO and CFWW + TEO samples. The lowest scores were obtained for control mortadella stored in air packaging. The addition of citrus fibre washing water and spice essential oils is a technologically viable alternative in emulsified meat products, since they improve customer acceptance and have desirable effects as regards oxidative stability and reduced microbial growth, which contributes to prolonging their shelf-life.

Lipid Oxidation Inhibition in Frozen Farmed Salmon (Oncorhynchus kisutc h ): Effect of Packaging

: Coho salmon (<I>Oncorhynchus kisutch</I>) has recently attracted a great interest as a farmed product. This research focuses on its commercialisation as a frozen product. For it, an advanced storage technology combining vacuum and a polyphenolic rich-film was applied for a 9-months storage period (–18°C). The study was addressed to lipid hydrolysis and oxidation changes and to endogenous antioxidant content in salmon muscle. No effect of packaging conditions could be observed on free fatty acid formation. However, vacuum packaging conditions provided a partial inhibition of primary (peroxide) and secondary (anisidine value) lipid oxidation development; this inhibitory effect was accompanied by a lower tocopherol isomers loss. The employment of a film including polyphenolic compounds led to a partial inhibition of α-tocopherol breakdown and to a lower secondary (anisidine value) and tertiary (fluorescent compound formation) lipid oxidation development. A partial inhibitory effect on lipid oxidation development is concluded for the employment of a polyphenolic compound rich-film packaging when applied to farmed coho salmon.

Effect of packaging conditions on quality and shelf-life of fresh-cut pineapple ( Ananas comosus)

Influence of packaging conditions on fresh-cut ‘Gold’ pineapple shelf-life were studied during 20 d of storage at 5 °C. Fresh-cut fruit pieces were packed in polypropylene trays (PP) and wrapped with 64 μm polypropylene film under active (high 40% or low oxygen, 11.4%) or passive modified atmospheres (air or cut fruit coated with 1%, w/v alginate). Changes in headspace composition, titratable acidity, pH, soluble solids content, juice leakage, color, texture, and microbial growth were evaluated over time. For all packaging conditions, oxygen concentration continuously decreased below its initial concentration over 20 d storage, but never reached levels below 2% O 2. Meanwhile, CO 2 concentration inside all packages continuously increased over time up to 10.6–11.7% from the initial conditions. Ethylene concentrations were always less than 0.4 μl L −1 while ethanol was detected only after 13 d of storage. Color parameters L * and b * significantly decreased over time in all packaging conditions and were directly attributed to the translucency phenomenon in the fruit flesh. When alginate coating was used, juice leakage was significantly reduced in contrast with the substantial juice accumulation observed in the rest of the packaging conditions. Texture profile analysis (TPA) parameters, did not significantly change over time, suggesting that structural characteristics of fresh-cut pineapple pieces were preserved throughout storage. From the microbial point of view, the shelf-life of ‘Gold’ fresh-cut pineapple was limited to 14 d by mesophilic bacterial growth. Further studies are needed to evaluate the sensory aspects, as well as to characterize the flesh translucency phenomenon and reduce juice leakage of fresh-cut pineapple.

Effect of packaging conditions on shelf-life of ostrich steaks

This study was conducted to establish the shelf-life of ostrich steaks stored in four different packaging types: (i) air exposure, (ii) vacuum, and two different modified atmospheres packages (iii) MAP: 80% CO 2 + 20% N 2, and (iv) MAP + CO: 30% CO 2 + 69.8% argon + 0.2% CO. Shelf-life evaluation was based on colour, lipid and hemopigments oxidation, microbial counts and sensory assessment of odour and colour. Samples stored under air exposure showed the highest lipid and hemopigments oxidation rate. Based on aerobic bacteria counts, the shelf life of ostrich steaks stored under aerobic conditions would be 8 d at most, whereas under vacuum, MAP or MAP + CO it would be 12 d. The presence of CO extends the shelf life of ostrich steaks by stabilisation of red colour measured by instrumental and sensory techniques, and maintenance of fresh meat odour by slowing down off-odour perception.

The effect of packaging conditions on the quality of minimally processed celeriac flakes

The aim of the study was to select packaging conditions of minimally processed celeriac to preserve their quality during storage for 12 days at 4 and 15 °C. The quality of the product was determined on the basis of colour measured in the CIE L ∗ a ∗ b ∗ system, sensory quality and total counts of mesophilic and psychrophilic bacteria, counts of moulds and yeasts, coliform counts, counts of Pseudomonas bacteria and the presence of bacteria from the genus Clostridium perfringens. Moreover, changes were determined in oxygen and carbon dioxide contents in the atmosphere within the packs, in which the product was stored. Celeriac flakes were packaged in the atmosphere with varying CO 2 contents (0%, 5%, 10%, 20%, 30%, 50% plus 2% O 2 and with balance N 2). After 12 days at 4 °C, it was found that celeriac flakes packaged in atmosphere containing 5% or 10% CO 2, 2% O 2 and balance N 2 were characterized by better quality than samples packaged in air atmosphere or in the atmosphere with CO 2 contents of 0% or higher than 10%. Modified atmosphere with the content of 5% or 10% CO 2, 2% O 2 and balance N 2, applied in the packaging of celeriac flakes, resulted in the inhibition of growth of mesophilic, psychrophilic and coliform bacteria in the tested minimally processed product.

Effect of packaging conditions and temperature on viability of microencapsulated bifidobacteria during storage

AbstractIn this study, Bifidobacterium longum B6 and B infantis CCRC 14633 were microencapsulated in various wall materials, including skim milk, gum arabic, gelatin and soluble starch. The stability of these microencapsulated bifidobacteria held at 25 or 4 °C in glass or polyester bottles with or without deoxidant and desiccant was determined. Microencapsulated cells of B longum B6 were generally more stable than the corresponding microencapsulated cells of B infantis CCRC 14633 under the various storage conditions tested. The presence of deoxidant and desiccant, especially at 25 °C, increased the survival of microencapsulated cells. Furthermore, the survival of bifidobacteria was enhanced when they were stored at 4 °C in glass bottles. It was also found that the wall material affected the survival of microencapsulated bifidobacteria. The viability of B longum B6 and B infantis CCRC 14633 was best when they were encapsulated in skim milk and held at 4 °C in glass bottles. Skim milk‐encapsulated B longum B6 cells showed a relatively low viability reduction of only 0.15–0.20 log (colony‐forming units (cfu g−1)) after 42 days of storage at 4 °C in glass bottles, regardless of the presence of deoxidant and desiccant. A reduction of 0.38–0.76 log (cfu g−1) was noted for skim milk‐encapsulated cells of B infantis CCRC 14633 under similar storage conditions. Copyright © 2004 Society of Chemical Industry

Effect of packaging conditions on the growth of micro-organisms and the quality characteristics of fresh mushrooms (Agaricus bisporus) stored at inadequate temperatures.

Mushrooms were packed in two polymeric films (perforated and non-perforated PVC) and stored at 17 degrees C and 25 degrees C. The carbon dioxide and oxygen content inside the packages, aerobic mesophiles, Pseudomonas spp., faecal coliforms, Escherichia coli, anaerobic spores and major sensory factors (colour, texture, development stage and presence of moulds) were determined. The non-perforated packages had the highest contents of CO2 (6-7%), the lowest contents of O2 (0.013-0.17%) and the most desirable quality parameters (texture, development stage and absence of moulds). Pseudomonas spp. counts were around 1 logarithmic unit lower in mushrooms packaged in non-perforated film as the O2 concentrations were lower than in perforated film. The mushrooms themselves were inoculated with an enterotoxin A-producing strain of Staphylococcus aureus, packaged in overwrapped trays and stored at 17 and 25 degrees C. Staphylococcus aureus did not grow in the samples stored at 17 degrees C. Only slight growth was observed in mushrooms packaged with non-perforated film after 1 day at 25 degrees C. No enterotoxin was detected in any package. Faecal coliform counts were <2 log cfu g(-1). Escherichia coli was not isolated in any of the samples. At 25 degrees C, counts of anaerobic spores of around 2 log cfu g(-1) were detected in those mushrooms packaged in non-perforated film.

The effect of packaging conditions and storage time on the volatile composition of Assam black tea leaf

Black tea leaf, vacuum packed in Assam and subsequently repacked in the UK in standard air packs, under vacuum or nitrogen- xushed, was stored for up to 48 weeks. The volatile composition of the tea was assessed at zero time, after 16 weeks and 48 weeks. Six compounds were identi wed as signi wcantly di verent at 16 and 48 weeks when compared with the zero time sample ( p < 0.001). These were identi wed as hexanal, trans-2-octenal, trans, cis-2, 4-heptadienal, trans, trans-2, 4-heptadienal, β-cyclocitral and β-ionone, the level of these being at an increased level in the standard air pack and similar to the zero time sample in the vacuumdash and nitrogen- xushed packs. These results are consistent with oxidative deterioration of the tea during storage. Subsequent canonical variate analysis was carried out using these six volatiles. Results indicated clear discrimination between the samples, in particular between the standard air packs and the other samples. This o vers the potential of using these compounds as indicators of tea aroma quality and as a means of distinguishing between tea samples based on exposure time in air.

Effects of Packaging Conditions on the Flavor Stability of Dry Whole Milk

ABSTRACTThe flavor stability of dry whole milk packed with air, nitrogen, or a mixture of 92% nitrogen and 8% hydrogen (NH) in gas‐impermeable pouches containing palladium as a catalyst was evaluated by measuring headspace volatile, oxygen, carbon dioxide contents using gas chromatography, brown color formation by reflective spectroscopy, and sensory scores. The headspace volatile and carbon dioxide contents of the dry whole milks packed with air or nitrogen were significantly higher (P &lt;0.05) than the samples packed with NH. Brown color formation and sensory scores of products packed with air were significantly different (P &lt;0.05) from the samples packed with 92% nitrogen and 8% hydrogen. The flavor stability of dry whole milk could be increased by packaging the products with NH in pouches containing palladium.