In this study, we investigated the quality and shelf-life of a dragee product obtained by coating a confectionery sunflower kernel with sugar syrup. The product was packed in oriented polypropylene/ oriented polypropylene, oriented polypropylene/metallised oriented polypropylene, polyester/polyethylene and kept at room temperature in daylight for 5 months. At the beginning of the experiment, the dragee product was in the category of excellent sensory quality (total score of sensory evaluation is between 18.0 and 20.0) in terms of its colour, smell, taste, mastication and structure. During the storage, these properties changed and the product lost its stability. Peroxide value in the dragee product increased from 0.5 to 9.0 mmol O/kg during the 5 months of storage. The free fatty acid content also increased from 1.3% in fresh dragee product to 2.5% after 5 months of storage. The packaging material metallised polyester/polyethylene, labelled metPET/PE, has the lowest oxygen permeability (8.0 mL m )2 /dan Dp 1 bar) and because of this it had the strongest influence in the prevention of hydrolytic and oxidative changes in the final product.
Dried fruits are very delicate to biochemical changes during storage, due to low water content, as well as low aw value. The shelf life of these products depends on aw value. Materials for dry fruits packaging are necessary to have appropriate barrier characteristics for water, oxygen, nitrogen and carbon dioxide molecules, as well as for electromagnetic rays, especially those with low wavelengths in UV region. During storage of packed dry fruits, qualitative changes, influenced by different packaging materials, may occur. The results of tested characteristics of different packaging materials, combination and their barrier features, as well as the qualitative changes of packaged dried apples are presented in this paper. The qualitative changes of color and sensory characteristics of packaged dried apples point out to influence of the type, combination as well as the barrier features of used packaging materials.
The food packaging industry demands polymer films possessing a defined barrier against permeation of gases, moisture and flavor. The objective of this study was to assess the differences between the barrier properties of coated and un-coated polyolefine films. Eight types of packaging films are prepared by standard industrial procedure by cast film extrusion processing with chill rollers: biaxially oriented polypropylene (BOPP), BOPP coated by acrylic copolymer, metallized BOPP by aluminum, and low-density polyethylene (LDPE). The influence of lamination and metallization on the gas molecules (CO2, O2 and N2) was determined by Lyssy's method. The moisture transparency was assessed according to the gravimetric method. The substantial differences between the barrier properties of the coated and un-coated films were estimated. It was estimated that the lamination process improves the oxygen barrier but not necessarily the moisture barrier, due to the different mechanisms for oxygen and moisture permeability. The obtained barrier properties data were considered from a practical point of view. It was concluded that films based on metallized BOPP has excellent barrier properties and can be used to over wrap food products.
The influence of protective properties of packaging materials and modified atmosphere on quality changes of dried apricot is shown in this paper. In our investigation, we used four different characteristic combinations of packaging materials with different barrier properties for packaging of dried apricot: polyester-polyethylene (PET/PE), paper-polyethylene (PAP/PE), paper-aluminiumpolyethylene (PAP/Al/PE), polyester-aluminium-polyethylene (PET/Al/PE) and two different atmospheric conditions: normal and modified (30% CO 2 , 60% N 2 ). The parameters evaluated in this study were moisture content, the content of the brown component and the hidroxymethilfurfural (HMF) content. During the storage period of 12 months, changes in moisture content, and colour changes of brown component and HMF contents were affected by the type, combination and applied packing conditions. During the investigation period, the moisture content increased, as well as the content of the brown component and the HMF content. The highest changes in moisture content are reported for dried apricot packaged in the PAP-PE under normal atmosperic condition (increased from 31.2 to 39.6%, taking into consideration 100 g of the sample, after 12 months of storage). The highest value of HMF content was recorded for dried aprricot packaged in the PAP-Al-PE with modified atmospheric condition after nine months of storage (0.152 mg/g). The research results indicate that sustainability of dried packaged apricot is affected by the selection of packaging material and the applied atmospheric conditions.
The authors present a case of a 20-year old student from Belgrade, who was admitted to the Institute of Infectious Diseases with fever, muscle and spine pains, strong headache and malice. During the clinical examination bilateral sacroileitis was found. Serological analyses confirmed brucellosis. Epidemiological data showed that she lived in Kosovo and Metohia in 1997, where she consumed diary products from domestic animals; this might be the reason of the acquired infection. With appropriate antibiotic therapy (aminoglycoside, doxicyclin, rifampicin), symptomatic therapy and rehabilitation the disease had favourable outcome; there was no recidive. The authors point out the importance of specific microbiological examinations of patients with fever of unknown origin, especially if the patient has the symptoms that are compatible with brucellosis. In our case it was sacroileitis, as a characteristic complication. As brucellosis is endemic in some parts of our country, there is always a possibility of brucellosis in general medical practice.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.