ABSTRACT
As indústrias de alimentos vêm inovando e desenvolvendo novos produtos e processamentos, e os consumidores estão mais conscientes e preocupados em relação às novas tecnologias alimentares, o que pode influenciar a aceitação dos alimentos. Nesse contexto, objetivou-se disponibilizar para a língua portuguesa o questionário originalmente desenvolvido em inglês que avalia a neofobia em relação à tecnologia de alimentos, denominado Food Technology Neophobia Scale (FNTS). O instrumento original composto por treze afirmações foi inicialmente traduzido para o português por três indivíduos bilíngues, de forma independente; na sequência, as versões em português foram traduzidas novamente para o inglês por outros três indivíduos bilíngues, também de forma independente. Procedeu-se então à análise das versões e ajustes para se obter uma única versão em português com equivalência conceitual e linguística, a qual recebeu o nome de Escala de Neofobia em relação à Tecnologia de Alimentos. As versões original e traduzida foram aplicadas a 30 indivíduos bilíngues para avaliação da confiabilidade e reprodutibilidade do questionário. Os resultados obtidos demonstraram que a tradução do instrumento foi adequada e confiável, podendo, portanto, ser empregada em estudos com consumidores brasileiros.
The food industries have been innovating and developing new products and processes.Consumers are aware and well concerned about new food technologies, which can influence food acceptance . In this context, the objective was to provide a portuguese version of the questionnaire developed in English to evaluate neophobia for food technology called Food Technology Neophobia Scale (FNTS). The original instrument consists of thirteen items and was initially translated into Portuguese by three bilingual individuals independently. Following the Portuguese versions were translated back into English by three other bilingual individuals, also independently. Analysis of versions and adjustments were performed to obtain a single version in Portuguese with linguistic and conceptual equivalence, which was called "Escala de Neofobia em relação à Tecnologia de Alimentos". The original and translated versions were applied to 30 bilingual individuals to evaluate the reliability and reproducibility of the questionnaire. The results showed that the translation of the instrument was adequate and reliable, therefore can be used in studies with Brazilian consumers.
ABSTRACT
The adhesion of the solids presents in food can difficult the process of surface cleaning and promotes the bacterial adhesion process and can trigger health problems. In our study, we used UHT whole milk, chocolate based milk and infant formula to evaluate the adhesion of Enterobacter sakazakii on stainless steel coupons, and we determine the work of adhesion by measuring the contact angle as well as measured the interfacial tension of the samples. Inaddition we evaluated the hydrophobicity of stainless steel after pre-conditioning with milk samples mentioned. E. sakazakii was able to adhere to stainless steel in large numbers in the presence of dairy products. The chocolate based milk obtained the lower contact angle with stainless steel surface, higher interfacial tension and consequently higher adhesion work. It was verified a tendency of decreasing the interfacial tension as a function of the increasing of protein content. The pre-conditioning of the stainless steel coupons with milk samples changed the hydrophobic characteristics of the surfaces and became them hydrophilic. Therefore, variations in the composition of the milk products affect parameters important that can influence the procedure of hygiene in surface used in food industry.
Subject(s)
Humans , Bacterial Adhesion , Cronobacter sakazakii/isolation & purification , Enterobacteriaceae Infections , Hydrophobic and Hydrophilic Interactions , Dairy Products/analysis , Food Samples , Methods , MilkABSTRACT
Microfiltration of milk reduces its microbial load providing a longer shelf life and preserving its nutritional and sensory characteristics. The present study compared the effect of the microfiltration treatment and of the milk pasteurization regarding the sensory acceptability by consumers aged from 7 to 70 years using a 7-point hedonic scale. The obtained results were evaluated by variance analysis and Duncanstest. Microbiological, acidity, instrumental color and heat treatment extent analyses were also performed. Microfiltered milk showed a higher microbial counting reduction and lower acidity; and lesser change incolor coordinates was found when compared to pasteurized milk, indicating the lack of reactions causedby heating. In the sensory acceptability, two groups were formed (p > 0.05) for microfiltered milk, being a group consisted of children, adolescents and elderly, who rated the highest sensory scores, and these cond one formed by adults. Comparing the two kinds of milk, pasteurized and microfiltered samples, no difference in the acceptation was found only in the group constituted by children. These findings highlights the importance in assessing the sensory quality of milk, seeing that the sensory perception is linked with the consumer purchase choice.
Subject(s)
Humans , Male , Female , Milk , Microstraining , Pasteurization , Consumer BehaviorABSTRACT
There is an increasing tendency to add natural antimicrobials of plant origin into food. The objective of this work was to develop a microbial sachet incorporated with allyl isothiocyanate (AIT), a volatile compound of plant origin, and to test its efficiency against growth of yeasts and molds, Staphylococcus sp. and psychrotrophic bacteria on sliced mozzarella cheese. Another objective was to quantify the concentration of AIT in the headspace of cheese packaging. A reduction of 3.6 log cycles was observed in yeasts and molds counts in the mozzarella packed with the antimicrobial sachet over 15-day storage time. The sachet also showed an antibacterial effect on Staphylococcus sp., reducing 2.4 log cycles after 12-day storage. Psychrotrophic bacteria species were the most resistant to the antimicrobial action. The highest concentration of AIT (0.08µg.mL-1) inside the active packaging system was observed at the 6-day of storage at 12 ºC ± 2 ºC. At the end of the storage time, AIT concentration decreased to only 10 percent of the initial concentration. Active packaging containing antimicrobial sachet has a potential use for sliced mozzarella, with molds and yeasts being the most sensitive to the antimicrobial effects.