scholarly journals Application of PET/Sepiolite Nanocomposite Trays to Improve Food Quality

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1188
Author(s):  
Teresa Fernández-Menéndez ◽  
David García-López ◽  
Antonio Argüelles ◽  
Ana Fernández ◽  
Jaime Viña
Keyword(s):  
Mechanical Properties ◽  
Food Quality ◽  
Barrier Properties ◽  
Packaging Material ◽  
The Other ◽  
Chemical Characteristics ◽  
Microbiological Characteristics ◽  
Physico Chemical ◽  
Food Needs ◽  
Lower Count

New PET and nanosepiolite materials are produced for its application in innovative packaging with better performance. In our previous work, we demonstrate that the use of different percentages of sepiolite modified with different organosilanes improved mechanical and barrier properties of PET. Nanocomposites permeability can decrease up to 30% compared to that of pure PET and the mechanical analyses show that, although PET nanocomposites are more brittle than virgin PET, they are also harder. In the present work, we are going to study the properties of this innovative packaging with real food analyzing mechanical properties related to the product transport together with permeability and microbiological characteristics. At the same time, it has been seen that it is possible to lighten trays, which is very important both industrially and environmentally. On the other hand, a good quality packaging for food needs to ensure that organoleptic and physico-chemical characteristics of the product inside are not modified due to migration of any of the packaging material to the food itself. Results obtained in this work also show lower count of aerobic mesophilic bacteria and Enterobacteriaceae (EB), reducing the incidence of food contaminations by microorganisms.

scholarly journals Determinants of food quality perception and their relationships to physico-chemical characteristics: an application to meat.

1988 ◽  
Vol 36 (4) ◽  
pp. 390-395
Author(s):  
J.B.E.M. Steenkamp ◽  
J.C.M. Trijp
Keyword(s):  
Quality Improvement ◽  
Food Quality ◽  
The Other ◽  
Chemical Characteristics ◽  
Model Data ◽  
Consumer Market ◽  
Quality Perception ◽  
Physico Chemical ◽  
Perception Process ◽  
Oriented Approach

A consumer-oriented approach to quality improvement can assist firms in agribusiness to sustain their profitability. A model of the food-quality perception process of consumers has been developed that can be used by firms to implement such a consumer-oriented quality strategy. An empirical study was conducted for meat to explore the relationships between the variables in the model. Data for the different phases of the model were obtained for a representative sample (n=384) of the total Dutch consumer market for foreroast (m. triceps brachee), pork rib-chop, blade steak and sirloin steak. Half of the sample was asked to evaluate the two pork cuts, while the other half participated in the evaluation of the two beef cuts. Consumers' perceptions of quality can be meaningfully related to the physico-chemical characteristics of the meat cuts. Furthermore, consumers are willing to pay more for better quality meat. [The article is based on a longer 308 page report, in Dutch, No. 29 in the series Produktschap voor Vee en Vlees, available from PUDOC, P.O. Box 4, 6700 AA Wageningen, Netherlands]. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Starch–Mucilage Composite Films: An Inclusive on Physicochemical and Biological Perspective

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2588
Author(s):  
Mansuri M. Tosif ◽  
Agnieszka Najda ◽  
Aarti Bains ◽  
Grażyna Zawiślak ◽  
Grzegorz Maj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Barrier Properties ◽  
Edible Films ◽  
Packaging Material ◽  
Polymer Materials ◽  
Synthesis Process ◽  
Packaging Materials ◽  
Packaging Film ◽  
Biodegradable Packaging ◽  
Effective Manner

In recent years, scientists have focused on research to replace petroleum-based components plastics, in an eco-friendly and cost-effective manner, with plant-derived biopolymers offering suitable mechanical properties. Moreover, due to high environmental pollution, global warming, and the foreseen shortage of oil supplies, the quest for the formulation of biobased, non-toxic, biocompatible, and biodegradable polymer films is still emerging. Several biopolymers from varied natural resources such as starch, cellulose, gums, agar, milk, cereal, and legume proteins have been used as eco-friendly packaging materials for the substitute of non-biodegradable petroleum-based plastic-based packaging materials. Among all biopolymers, starch is an edible carbohydrate complex, composed of a linear polymer, amylose, and amylopectin. They have usually been considered as a favorite choice of material for food packaging applications due to their excellent forming ability, low cost, and environmental compatibility. Although the film prepared from bio-polymer materials improves the shelf life of commodities by protecting them against interior and exterior factors, suitable barrier properties are impossible to attain with single polymeric packaging material. Therefore, the properties of edible films can be modified based on the hydrophobic–hydrophilic qualities of biomolecules. Certain chemical modifications of starch have been performed; however, the chemical residues may impart toxicity in the food commodity. Therefore, in such cases, several plant-derived polymeric combinations could be used as an effective binary blend of the polymer to improve the mechanical and barrier properties of packaging film. Recently, scientists have shown their great interest in underutilized plant-derived mucilage to synthesize biodegradable packaging material with desirable properties. Mucilage has a great potential to produce a stable polymeric network that confines starch granules that delay the release of amylose, improving the mechanical property of films. Therefore, the proposed review article is emphasized on the utilization of a blend of source and plant-derived mucilage for the synthesis of biodegradable packaging film. Herein, the synthesis process, characterization, mechanical properties, functional properties, and application of starch and mucilage-based film are discussed in detail.

scholarly journals Kopalińskie Lake as an example of an anthropogenic reservoir of the southern Baltic Sea coast

2012 ◽  
Vol 12 (1) ◽  
pp. 3-10
Author(s):  
Roman Cieśliński ◽  
Alicja Olszewska
Keyword(s):  
Water Balance ◽  
Lake Water ◽  
The Other ◽  
Anthropogenic Activity ◽  
Chemical Characteristics ◽  
Lake Basin ◽  
Coastal Lakes ◽  
Basin Morphometry ◽  
Physico Chemical ◽  
Sea Coast

Abstract The aim of this study is to discuss the water balance of Kopalińskie Lake, which is one of a few reservoirs on the Polish coast formed from anthropogenic activity. To realize this aim, lake basin morphometry and catchment hydrography were characterized. Moreover, the influence of the sea and the physico-chemical characteristics of the lake water were defined. As a result, the main characteristics of the lake and its catchment were found. Common characteristics of Kopalińskie Lake, as well as the characteristics that differentiate this reservoir from the other coastal lakes located on the Polish coast are presented in this work.

scholarly journals Physico-chemical characteristics of passion fruit flour under removal of flavedo and of maceration

2019 ◽  
Vol 23 (11) ◽  
pp. 869-875
Author(s):  
Elaine C. O. da Silva ◽  
Wilton P. da Silva ◽  
Josivanda P. Gomes ◽  
Cleide D. P. da S. e Silva ◽  
Leidjane M. de Souto ◽  
...  
Keyword(s):  
Moisture Content ◽  
Protein Concentration ◽  
Neutral Detergent Fiber ◽  
Passion Fruit ◽  
The Other ◽  
Chemical Characteristics ◽  
Acid Detergent Fiber ◽  
Physico Chemical ◽  
Light Color ◽  
Physical And Chemical

ABSTRACT Passion fruit has the peel (albedo and flavedo) as its major component and it can be used in the production of flour as source of nutrients and enrichment of food products. Thus, this study aimed to evaluate the production of flours from passion fruit albedo and whole peel, verifying the influences of flavedo removal and maceration, as well as the variation in drying temperature (70 and 80 °C) on the physical and chemical characteristics of the flours. The flours has a light color with slight trend to red and stronger trend to yellow. Moisture content is within the limits established by the current norms of ANVISA (a maximum of 15%). The flavedo removal contributed to the increase of water, crude fiber, neutral detergent fiber and acid detergent fiber concentrations. However, it reduced moisture, ash, protein, lipids and carbohydrates concentrations. On the other hand, the maceration decreases luminosity, lipids and carbohydrates and increases the chromaticity a* and b* and moisture in the flours. In relation to the increase in temperature, a decrease was observed in the protein concentration and an increase in the concentration of ash and lipids. Based on centesimal composition, the flour should be prepared with whole peel without maceration and dried at 80 °C.

Feasibility of Irradiated Corn-Based Bioplastics as Packaging Material

2021 ◽  
Vol 317 ◽  
pp. 241-250
Author(s):  
Nur Nadia Nasir ◽  
Siti Amira Othman
Keyword(s):  
Mechanical Properties ◽  
Review Paper ◽  
Barrier Properties ◽  
Packaging Material ◽  
Cross Linking ◽  
Major Drawback ◽  
Water Barrier ◽  
Wide Range

There are increasing intrest in research on corn based bioplastic to replace current plastic. However, corn based bioplastic faces a major drawback which are lack water barrier and poor mechanical properties resulting from its hydophilic properties. To produce better corn based bioplastic properties, a lot of research has been focuses on blend corn based bioplastic with other co biopolymer or additives and also radiation. By using radiation corn based bioplastic will induce degradation, cross linking or grafting and next the properties of corn based bioplastic will be improve in aspect of mechanical, physical and barrier properties and also acceptable to use as packaging material. Irradiated corn based bioplastic also have wide range of technology, the availability, less harmful to environment and the most important is the potential to use as packaging material. There is hot debate about using irradiated corn based bioplastic as packaging material. This review paper will be discussing and also to provide information on influence of radiation on the properties corn based bioplastic and its feasibility as packaging material.

scholarly journals Evaluación de las características microbiológicas y fisicoquímicas del agua sometida a procesos de esterilización en autoclaves a vapor

Respuestas ◽  
2017 ◽  
Vol 22 (2) ◽  
pp. 59
Author(s):  
Johanna Tapias-Rivera ◽  
Christian Chacin-Zambrano ◽  
Oscar Guarín-Villamizar ◽  
Juan Carlos Uribe-Caputi
Keyword(s):  
Development Process ◽  
Process Development ◽  
Tap Water ◽  
Fecal Coliforms ◽  
Chemical Characteristics ◽  
Mesophilic Bacteria ◽  
Microbiological Characteristics ◽  
Physico Chemical ◽  
Before And After ◽  
Sterilization Process

 El presente trabajo describe las características fisicoquímicas y microbiológicas del agua antes y después de ser sometidas a un proceso de esterilización en un autoclave a vapor con carga de instrumental y paquetes de vestuario quirúrgico, con el fin de establecer el potencial para el posterior sin causar ningún efecto en la validez de la carga por ciclo. Las mediciones fueron descritas por separado, antes del primer proceso de esterilización, durante la etapa de descarga y de la entrada del agua que fue utilizada para dicho proceso. Para el desarrollo del proceso, se realizaron tres tomas de muestras con agua de osmosis y 5 correspondientes al agua directamente de grifo; posterior a cada toma de muestra se tomaron en cuenta los parámetros de esterilización, resoluciones ambientales y microbiológicas. Los resultados obtenidos mostraron significancia en los diferentes puntos de toma de muestras que llevaron a concluir alteraciones en el agua de osmosis en los diferentes puntos de muestra (entrada, chaqueta y descarga) del autoclave en lo relacionado a las características fisicoquímicas del agua obtenida de los puntos analizados del autoclave. Adicionalmente se observó presencia de coliformes totales y fecales, aerobios mesófilos que indicaron que el agua no es apta para recirculación dentro del autoclave.Palabras clave: Agua, autoclave, esterilización, vapor. Abstract The present study sought to describe the physico-chemical and microbiological characteristics of the water before and after being subjected to UN sterilization process steam autoclave load packages instrumental and surgical clothes, in order to establish its potential usefulness f back without causing any effect on the validity of the charging cycle. Were the measurements described Separately, Before the sterilization process, during the discharge stage and the entry of water that was used for this process. Development Process Three samplings were carried out with osmosis water and 5 for tap water Directly From; after each sample took into account the parameters of sterilization, Environmental Resolutions and microbiological obtained significant results in the different points of Sampling leading one Conclude Disturbances osmosis water at different points Sample (input, jacket Download and) the autoclave in relation to the physico-chemical characteristics of water obtained from the Points analyzed the autoclave, likewise presence of total and fecal coliforms was observed aerobic mesophilic bacteria which indicated that water is not suitable for recirculation within the autoclave.Keywords: Water, autoclave, sterilization steam. Resumo O presente trabalho descreve as características físico-químicas e microbiológicas da água antes e depois de ser submetido a um processo de esterilização em uma autoclave de vapor carregada com instrumentos e embalagens de vestuário cirúrgico, a fim de estabelecer o potencial para o posterior sem causar qualquer efeito sobre a validade da carga por ciclo. As medidas foram descritas separadamente, antes do primeiro processo de esterilização, durante a descarga e a fase de entrada da água que foi utilizada para o referido processo. Para o desenvolvimento do processo, foram colhidas três amostras com água de osmose e 5 correspondentes à água diretamente da torneira; Após cada amostragem, foram considerados os parâmetros de esterilização, as resoluções ambientais e microbiológicas. Os resultados obtidos mostraram diferenças significativas nos pontos de amostragem que levaram à conclusão de alterações na água de osmose nos diferentes pontos de amostra (entrada, revestimento e descarga) da autoclave em relação às características físicoquímicas da água obtida das amostras. pontos da autoclave. Além disso, observou-se a presença de coliformes totais e fecais, mesófilos aeróbicos que indicaram que a água não é adequada para a recirculação dentro da autoclave.Palavras-chave: Água, autoclave, esterilização, vapor.

Setting and Strengthening Mechanisms of Cementitious Materials

1991 ◽  
Vol 245 ◽  
Author(s):  
W. Jiang ◽  
D.M. Roy
Keyword(s):  
Mechanical Properties ◽  
Setting Time ◽  
Construction Materials ◽  
Cementitious Materials ◽  
Cement Matrix ◽  
Chemical Characteristics ◽  
Strengthening Mechanisms ◽  
Portland Cements ◽  
Dental Cement ◽  
Physico Chemical

ABSTRACTThis paper highlights the physico-chemical characteristics of cementitious materials responsible for or involved in setting, and how these are related to the strengthening and mechanical properties. Five main mechanisms which can be used to increase cementitious materials strength were discussed. The substantially improved cement matrix materials can be obtained by deliberately using one or more above mechanisms. Experiments have been performed on ordinary portland cements and phosphate cements used as construction materials, whose setting time is several hours, and dental cement, whose setting time is several minutes.

Isolation and Microscopic Characterization of Nuclear Fuel Particles from Two Contaminated Soils of Chernobyl

2000 ◽  
Vol 663 ◽  
Author(s):  
Ahamdach Noureddine ◽  
Stammose Denise
Keyword(s):  
Nuclear Fuel ◽  
Contaminated Soils ◽  
Source Term ◽  
The Other ◽  
Chemical Characteristics ◽  
Physico Chemical ◽  
Fuel Particles ◽  
Scanning Electron ◽  
Nuclear Fuel Particles

ABSTRACTNuclear fuel particles were separated, from two different Chernobyl contaminated soils, by sedimentation in bromoform. Their physico-chemical characteristics were studied by scanning electron microscopy. The two soils show the same types of fuel particles: one part of these particles contains U and O and the other part contains U, Zr and O. The structure and the surface morphology of the studied particles are variable and are characteristic of the conditions of their formation. The source term is thus heterogeneous. This heterogeneity has direct consequences on the dissolution of the fuel particles and should be taken into account in mathematical models.

Researches on the Structure of Rubber

1928 ◽  
Vol 1 (3) ◽  
pp. 401-409 ◽  
Author(s):  
Paul Bary ◽  
Ernst A. Hauser
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
The Other ◽  
X Ray ◽  
Physico Chemical

Abstract The theory according to which rubber consists of two components which normally are dissolved one in the other (Bary), is based on a number of physico-chemical observations, and is in general agreement with the results of x-ray work. The very nature of the x-ray diagrams substantiates the theory by introducing the idea that stretching rubber causes a separation of part of the dissolved component from its solvent (theory of Hauser and Mark). It may be concluded that rubber consists of a network of β-rubber which is capable of giving x-ray diagrams only when it is sufficiently condensed, that is, when its chains of carbon atoms have little freedom of oscillation. This result can be obtained either by freezing the rubber, which increases the proportion of the β-form, or by elongation, which expels the a-portion and concentrates the β-portion. This concept appears to explain all observations on the physical and mechanical properties of rubber.

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