Pineapple juice (Ananas comosus (L.) Merril) development using high hydrostatic pressure applied to the fruit puree

Orientadores: Helena Maria Andre Bolini, Rosires DelizaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de AlimentosResumo: O abacaxi é uma fruta apreciada em todo mundo, devido às suas distintas características sensoriais, podendo ser consumido ¿in natura¿ ou processado de diversas maneiras, sendo o suco a forma de processamento mais popular. O Brasil é o quarto maior produtor mundial de abacaxi, e nos cinco últimos anos a exportação do suco da fruta aumentou cerca de sete vezes. Associado à produção deste está o tratamento térmico, que afeta a qualidade sensorial, produzindo alterações desagradáveis ao produto. Nos últimos anos, os consumidores têm procurado por alimentos que mantenham as características sensoriais e nutricionais do produto, aliado à garantia da segurança microbiológica. A Alta Pressão Hidrostática (APH) é uma tecnologia inovadora, capaz de inativar microorganismos patogênicos e deteriorantes, enquanto minimiza a perda da qualidade sensorial e nutricional do alimento. Este trabalho teve como objetivo processar suco de abacaxi (Ananás comosus (L.) Merril, variedade Smooth Cayenne) através da tecnologia de APH aplicada à polpa do fruto e avaliar as características microbiológicas, sensoriais e a aceitabilidade do produto obtido. Os dados foram analisados através da Análise de Variância (ANOVA), testes de médias de Tukey, Análise de Componentes Principais (ACP), Mapa Interno da Preferência, ¿Cluster Analysis¿, bem como Mapa Externo da Preferência utilizando o programa estatístico SAS e XLSAT. O processamento a APH da polpa de abacaxi por 300MPa e 5 min à 25oC, demonstrou ser eficaz para a produção de polpa com vida útil de 14 dias, estando de acordo com os parâmetros determinados pela legislação brasileira. Os resultados obtidos na determinação de concentração de polpa e doçura ¿ideais¿ para a formulação do suco de abacaxi foram 56,5% e 7,0%, respectivamente. A Análise Descritiva Quantitativa demostrou a similaridade sensorial entre as amostras de suco de abacaxi obtida através da polpa ¿in natura¿ e da polpa tratada por APH (300MPa/5 min/25oC) e que de forma geral, possuem diferença significativa (p<0,05) das amostras comerciais estudadas. Os atributos sabor de suco de abacaxi natural, cor característica de suco de abacaxi natural, aroma característico de suco de abacaxi natural, consistência e presença de fibras visual e percebida na boca apresentaram maior importância para a caracterização dos produtos obtidos através da polpa ¿in natura¿ e da polpa tratada por APH (300MPa /5 min/ 25oC). O teste de aceitação comprovou que as amostras de suco de abacaxi obtidas através da polpa ¿in natura¿ e da polpa tratada por APH (300MPa/5 min/25oC), apresentaram aceitação significativamente (p<0,05) superior às amostras comerciais avaliadas, e sem diferença (p<0,05) entre si, sendo preferidas por segmentos específicos de consumidores. Os atributos que apresentaram maior importância na caracterização dos produtos obtidos através da polpa ¿in natura¿ e da polpa tratada por APH (300MPa/5 min/25oC) dirigiram a preferência de alguns segmentos de consumidoresAbstract: Pineapple is a well appreciated fruit worldwide due to its distinct sensory characteristics, to be consumed ¿in natura¿ or processed in many different ways, juice being the most popular industrialized product. Brazil is the fourth world pineapple producer, presenting a seven fold increase in pineapple juice exportation in the last five years. Thermal treatment associated to juice production affects its sensory quality, resulting in unacceptable changes in the industrialized product. Nowadays consumers are searching for Technologies which preserve nutritional and sensory characteristics of food, as well as guarantee its microbiological safety. High Hydrostatic Pressure (HHP) is an innovative technology capable of inactivating pathogenic and deteriorative microorganisms while minimizing loss of sensory and nutritional product quality. The objectives of this study were to process pineapple juice (Ananas comosus (L.) Merril, Smooth Cayenne variety) through HHP technology applied to the fruit puree and to investigate the microbiological and sensory characteristics of the obtained juice, as well as its acceptability. Data were analyzed through Analysis of Variance (ANOVA); Tukey¿s mean tests; Principal Components Analysis (PCA); Internal Preference Mapping; Cluster Analysis, as well as External Preference Mapping, using statistical programs as SAS and XLSTAT. HHP processing of pineapple puree at 300 MPa for 5 minutes at 25ºC resulted in the production of pineapple puree with a shelf-life of 14 days, in accordance to microbiological parameters established by Brazilian Legislation. Results found in the determination of ideal pineapple puree concentration and ideal sweetness for pineapple juice formulation were 56.5% and 7.0%, respectively. Quantitative Descriptive Analysis (QDA) revealed a sensory similarity between the pineapple juice samples obtained from the utilization of ¿in natura¿ puree and of HHP treated puree (300MPa/5min/25ºC), both showing a statistically significant difference (p<0,05) compared to the commercial pineapple juice samples evaluated in this study. The following sensory attributes: natural pineapple juice flavor; characteristic natural pineapple juice color; characteristic natural pineapple juice aroma; consistency and visual and mouth-perceived fiber presence were considered the most important concerning the sensory characterization of both juices obtained from the utilization of ¿in natura¿ puree and of HHP treated puree (300MPa/5min/25ºC). The acceptance test established that the pineapple samples obtained from the utilization of ¿in natura¿ puree and of HHP treated puree (300MPa/5min/25ºC) showed higher statistically significant acceptance (p<0,05) in relation to the evaluated commercial samples, bearing no statistical significant difference (p<0,05) between them; each one being preferred by specific consumer segments. The sensory attributes which mostly contributed to the characterization of pineapple juices obtained from the utilization of ¿in natura¿ puree and of HHP treated puree (300MPa/5min/25ºC) drove the preference in some consumer segmentsMestradoConsumo e Qualidade de AlimentosMestre em Alimentos e Nutriçã

Food Processing Innovation: A Case Study with Pressurized Passion Fruit Juice

Tropical fruit juice production shows an annual increase in volume of 15 to 20% in Brazil. Growing demand for processed fruit pulp arouses juice industry interest to search for novel technologies. High Hydrostatic Pressure (HHP) is an innovative technology which allows juice production with improved sensory characteristics compared to pasteurization, meeting consumer demands for fresh-like foods. Despite recognized advantages of pressurized products described in the literature, a positive consumer attitude towards them is required to guarantee their success in today’s competitive global market. The objective of this study was to evaluate the effect of packaging attributes on consumer expected liking and purchase intention of passion fruit juice. One hundred and twenty consumers evaluated twelve prototypes for expected liking and purchase intention. Data were analyzed using ANOVA, Conjoint and Cluster Analyses. Results showed that information about benefits of used technology (HHP) presented on the package played an important role on consumer attitude, suggesting a positive contribution to his/her satisfaction, a key point for the food industry.Tropical fruit juice production shows an annual increase in volume of 15 to 20% in Brazil. Growing demand for processed fruit pulp arouses juice industry interest to search for novel technologies. High Hydrostatic Pressure (HHP) is an innovative technology which allows juice production with improved sensory characteristics compared to pasteurization, meeting consumer demands for fresh-like foods. Despite recognized advantages of pressurized products described in the literature, a positive consumer attitude towards them is required to guarantee their success in today’s competitive global market. The objective of this study was to evaluate the effect of packaging attributes on consumer expected liking and purchase intention of passion fruit juice. One hundred and twenty consumers evaluated twelve prototypes for expected liking and purchase intention. Data were analyzed using ANOVA, Conjoint and Cluster Analyses. Results showed that information about benefits of used technology (HHP) presented on the package played an important role on consumer attitude, suggesting a positive contribution to his/her satisfaction, a key point for the food industry.Tropical fruit juice production shows an annual increase in volume of 15 to 20% in Brazil. Growing demand for processed fruit pulp arouses juice industry interest to search for novel technologies. High Hydrostatic Pressure (HHP) is an innovative technology which allows juice production with improved sensory characteristics compared to pasteurization, meeting consumer demands for fresh-like foods. Despite recognized advantages of pressurized products described in the literature, a positive consumer attitude towards them is required to guarantee their success in today’s competitive global market. The objective of this study was to evaluate the effect of packaging attributes on consumer expected liking and purchase intention of passion fruit juice. One hundred and twenty consumers evaluated twelve prototypes for expected liking and purchase intention. Data were analyzed using ANOVA, Conjoint and Cluster Analyses. Results showed that information about benefits of used technology (HHP) presented on the package played an important role on consumer attitude, suggesting a positive contribution to his/her satisfaction, a key point for the food industry

&lt;b&gt;AVALIAÇÃO DO RISCO DE DESENVOLVIMENTO DE TRANSTORNOS ALIMENTARES EM ALUNAS DO ENSINO MÉDIO DE ESCOLAS PARTICULARES, ARACAJU - SE&lt;/b&gt;

&lt;p align="justify"&gt; Os transtornos alimentares são quadros psiquiátricos caracterizados por uma grave perturbação do comportamento alimentar, sendo a Anorexia e Bulimia Nervosa os dois tipos principais, os quais afetam principalmente adolescentes femininas e adultas jovens. O objetivo do trabalho foi avaliar o risco de alunas do ensino médio em escolas particulares de Aracaju-SE de desenvolverem transtornos alimentares dos tipos Anorexia e Bulimia Nervosa. Utilizou-se um questionário autopreenchível (com validação primária) em 320 alunas, de 14 a 18 anos de idade, que aceitaram responder às questões sobre comportamento alimentar, imagem corporal, entre outras. O risco de desenvolvimento de transtornos alimentares na população avaliada foi evidenciado por determinadas manifestações, como a prática de dietas (39,0%), uso de medicamentos para emagrecer (10,8%), consumo compulsivo excessivo de alimentos (40,7%) e eventos bulímicos (7,8%). Tendo em vista que a insatisfação corporal é um dos fatores principais que modulam a gênese dos distúrbios alimentares, o desgosto pelo próprio corpo (40,3%), apresentado pelas alunas analisadas, revelou a possibilidade de desenvolverem Anorexia e Bulimia Nervosa. Os resultados indicam a substancial necessidade de prevenção desses transtornos por meio de folderes e palestras, além da capacitação de profissionais da saúde e professores de ensino médio para a detecção do problema. &lt;/p&gt