Resumo Objetivou-se neste trabalho avaliar a intenção de compra de bebidas de soja sabor original correlacionando-a com características da embalagem por meio da análise conjunta de fatores. Levantamento dos atributos ocorreu por grupo de foco (41 participantes) e cinco amostras de bebida de soja brasileiras. Principais atributos que interferiam na decisão de compra: marca, presença de apelo nutricional, tipo da ilustração de copo contendo bebida e cor do fundo. Atributos foram combinados gerando oito propostas de embalagens, avaliadas por 86 participantes. Usou-se o SAS para análise dos dados, sendo 85 destes consistentes. Agruparam-se participantes por similaridades/dissimilaridades em três grupos: G1 (48 participantes), G2 (31) e G3 (6). G1 preferiu embalagem contendo apelo nutricional e fundo claro, sendo influenciado pela marca. Já o G2 optou por embalagem contendo apelo nutricional, marca menos conhecida e copo preenchido. G3 preferiu presença de apelo nutricional, marca menos conhecida, copo cheio e fundo escuro. Presença do apelo nutricional é o fator que mais impacta na decisão de compra, mas a marca, tipo de ilustração de copo e cor do fundo são relevantes. Embalagem com presença do apelo nutricional, copo com preenchimento total e fundo claro tem maior probabilidade de interesse de compra pelos consumidores.

Abstract The objective of this work was to evaluate the intention to purchase plain soymilk by correlating it with packaging characteristics through the conjoint analysis. Survey of attributes occurred by focus group (41 participants) and five samples of Brazilian original soymilk. Main attributes that interfered in the purchase decision: brand, presence of nutritional appeal, type of illustration of glass containing beverage and background color. Attributes were combined to generate eight packaging proposals, evaluated by 86 participants. SAS was used for data analysis, 85 of which were consistent. Participants were grouped by similarities/dissimilarities in three groups: G1 (48 participants), G2 (31) and G3 (6). G1 preferred packaging containing nutritional appeal and light background, being influenced by the brand. G2 opted for packaging containing nutritional appeal, lesser-known brand and filled glass. G3 preferred the presence of nutritional appeal, lesser known brand, full glass and dark background. Presence of nutritional appeal is the factor that most impacts the purchase decision, but the brand, type of glass illustration and background color are relevant. Packaging with the presence of nutritional appeal, glass with full filling and clear background is more likely to be of interest to consumers.

Resumen El objetivo de este trabajo fue evaluar la intención de compra de la leche de soja natural correlacionándola con las características del envase a través del análisis conjunto. El estudio de los atributos se realizó mediante un grupo focal (41 participantes) y cinco muestras de leche de soja original brasileña. Principales atributos que interfirieron en la decisión de compra: marca, presencia de atractivo nutricional, tipo de ilustración del vaso que contiene la bebida y color de fondo. Los atributos se combinaron para generar ocho propuestas de envase, evaluadas por 86 participantes. Se utilizó SAS para el análisis de los datos, 85 de los cuales fueron consistentes. Los participantes se agruparon por similitudes/disimilitudes en tres grupos: G1 (48 participantes), G2 (31) y G3 (6). El G1 prefirió un envase que contuviera un atractivo nutricional y un fondo claro, estando influenciado por la marca. El G2 optó por un envase con atractivo nutricional, una marca menos conocida y un vaso relleno. El G3 prefirió la presencia del atractivo nutricional, la marca menos conocida, el vaso lleno y el fondo oscuro. La presencia del atractivo nutricional es el factor que más influye en la decisión de compra, pero la marca, el tipo de ilustración del vidrio y el color del fondo son relevantes. Los envases con presencia de atractivo nutricional, vidrio con relleno completo y fondo claro tienen más probabilidades de interesar a los consumidores.

Coffee is one of the most popular beverages in the world, however, little information is found regarding the mineral composition of commercial roasted and ground coffees (RG) and its correlation with organic bioactive compounds. 21 commercial Brazilian RG coffee brands - 9 traditional (T) and 12 extra strong (ES) roasted ones - were analyzed for the Cu, Ca, Mn, Mg, K, Zn, and Fe minerals, caffeine, 5-caffeoylquinic acid (5-CQA) and melanoidins contents. For minerals determination by flame atomic absorption spectrometry (FAAS), the samples were decomposed by microwave-assisted wet digestion. Caffeine and 5-CQA were determined by liquid chromatography and melanoidins by molecular absorption spectrometry. The minerals and organic compounds contents association in RG coffee was observed by a principal component analysis. The thermostable compounds (minerals and caffeine) were related to dimension 1 and 2, while 5-CQA and melanoidins were related to dimension 3, allowing for the T coffees segmentation from ES ones.

Abstract Commercial roasted and ground coffees are usually blends of Coffea arabica and Coffea canephora. Considering the differences in price and sensory characteristics between these two species, the identification of the presence of each species in commercial blends is of great interest. The aim of this study was to describe typical profiles of caffeine and diterpenes (kahweol and cafestol) contents and the ratios among these compounds to support the characterization of Coffea species in roasted coffees. 32 good cup quality Brazilian C. arabica coffees (from coffee quality contests) produced using different postharvest treatments were studied. All analysis were performed by HPLC. Higher ranges were observed in diterpene contents - kahweol varied from 1.75 to 10.68 g/kg (coefficient of variation of 510%) and cafestol from 1.76 to 9.66 g/kg (449%) - than caffeine, that varied from 5.1 to 16.2 g/kg (coefficient of variation of 218%). Wide ranges of the kahweol/cafestol ratio (0.63 to 2.77) and the caffeine/kahweol ratio (0.84 to 5.15) were also observed. Hence it was proposed the additional use of a new parameter, the ratio of caffeine/sum of diterpenes (kahweol + cafestol) that presents values from 0.54 to 2.39. The results indicated that the combined use of these parameters could be a potential tool for discriminating Coffea species in blends of roasted and ground coffee. It was proposed as potentially indicative of C. arabica: values of kahweol/cafestol ratio above 0.50, associated with caffeine/kahweol ratio lower than 5.50 and caffeine/sum of diterpenes ratio lower than 2.50.

RESUMO O perfil dos compostos bioativos em bebidas café depende das espécies e variedades de café, métodos de plantio e processamento pós-colheita, processo de torra e também do método de preparação da bebida. O trabalho teve como objetivo estudar os teores de caveol e cafestol - diterpenos do café com efeitos conhecidos a saúde - comparando bebidas de café preparadas usando métodos usuais de preparo (filtrada, espresso e café solúvel). As bebidas filtradas (pano ou papel), espresso e café solúvel foram obtidas de grãos com torra média da espécie Coffea arabica (tipo 2). Cinco repetições genuínas de cada bebida foram preparadas e os extratos foram liofilizados. Os diterpenos foram quantificados por CLUE. Os resultados foram relatados em mg de diterpeno por g de sólidos ou por dose padrão de 50 mL. O teor de sólidos das bebidas de café variou de 2,06 a 2,46 g 100 mL-1. Todas as bebidas apresentaram baixo teor de diterpenos: 0,05 a 0,16 mg de kahweol e 0,11 a 0,14 mg de cafestol 50 mL-1. A bebida instantânea mostrou o menor teor de kahweol e ausência de cafestol, redução relacionada ao processo de produção de café solúvel. O teor de diterpenos foi semelhante em cafés espresso e filtrados em papel. O café filtrado em pano apresentou menor teor de sólidos, mas níveis mais elevados de diterpenos (em mg g-1 de sólidos). Teores similares de cafestol e kahweol (mg 50 mL-1) foram observados nas bebidas filtradas e no espresso.

ABSTRACT The profile of bioactive compounds in coffee brews depends on the coffee bean species and varieties, harvesting and post-harvesting practices, roasting processes, and also on the brewing method. The present research aimed to study the contents of cafestol and kahweol - coffee diterpenes with a known impact on human health - comparing coffee beverages prepared using common brewing methods (filtered, espresso, and instant coffee brews). Filtered (cloth-filtered and paper-filtered), espresso and instant brews were obtained from a medium-roasted Coffea arabica coffee (NY 2). Five genuine replicates of each coffee brew were prepared, and the extracts were lyophilized. A validated UPLC-based method provided the content of diterpenes. The results were reported in mg of diterpene per g of solids or per a standard dose of 50 mL of coffee brew. Solids content of coffee brews ranged from 2.06 to 2.46 g 100 mL-1. All coffee brews presented low diterpene contents: 0.05 to 0.16 mg of kahweol and 0.11 to 0.14 mg of cafestol 50 mL-1. Instant coffee brew showed the lowest content of kahweol and absence of cafestol; this reduction was related to the production process of soluble coffee. Diterpenes content was similar in espresso and paper-filtered brews. The cloth-filtered coffee had lower solids content, but higher levels of diterpenes (in mg g-1 of solids). Similar cafestol and kahweol contents (mg 50 mL-1) were observed in filtered and espresso brews.

Resumo A microencapsulação é um processo indicado para proteger substâncias que são susceptíveis à degradação ou redução da sua funcionalidade por causa de diferentes reações, por exemplo, oxidação, hidrólise, entre outras. O objetivo deste estudo foi avaliar o efeito da microencapsulação, usando como materiais de parede maltodextrina ou amido modificado, sobre a estabilidade de hidrolisados proteicos de okara. A pesquisa analisou a microestrutura, a capacidade antioxidante e a cor das amostras durante a estocagem dos pós por 120 dias a 35 °C. As micrografias obtidas por microscopia eletrônica de varredura indicaram que o processo de microencapsulação favoreceu a integridade física das partículas. A diferença de cor observada entre as amostras encapsuladas e não encapsuladas foi proveniente, provavelmente, da adição de materiais de paredes que contribuíram para a mudança da cor do pó obtido por spray drying. Os resultados indicaram que as microcápsulas obtidas por spray drying usando maltodextrina ou amido modificado mantiveram a cor dos pós e apresentaram boa habilidade em sequestrar o radical livre ABTS e teor de substâncias redutoras do reagente Folin-Ciocalteu durante a estocagem.

Abstract Microencapsulation is a process used for protecting substances that are susceptible to degradation or reduction of their functionality due to different reactions such as oxidation, hydrolysis, among others. This study aimed to evaluate the effect of microencapsulation, using maltodextrin or modified starch as wall materials, on the stability of okara protein hydrolysates. We analyzed the microstructure, antioxidant capacity, and color of the samples during powder storage for 120 days at 35 °C. Micrographs obtained by scanning electron microscopy indicated that the microencapsulation process favored the particles’ physical integrity. The color difference observed between the encapsulated and unencapsulated samples was probably due to the addition of wall materials that contributed to color change of the powder obtained by spray drying. The results indicated that the microcapsules obtained by spray drying using maltodextrin or modified starch maintained the powder color and showed good ability to sequester the free radical ABTS and content of reducing substances from the Folin-Ciocalteau reagent during storage.

RESUMO Em torno de 20% da produção brasileira de café corresponde a grãos defeituosos (PVA), que reduzem a qualidade das bebidas. O tratamento com vapor tem sido proposto como alternativa para melhorar a qualidade de produtos de café. O trabalho teve como objetivo estudar a viabilidade do emprego de grãos defeituosos (PVA) de café Robusta tratados com vapor em produtos de café solúvel. Após o tratamento com vapor (pressão de 2 bar por 3 min), os grãos Robusta PVA foram secos, torrados, extraídos em planta piloto e liofilizados. Os materiais Robusta PVA tratados com vapor e não tratados (café cru, torrado e solúvel) e os blends de cafés solúveis produzidos com café Arábica foram caracterizados. O café solúvel Robusta PVA tratado com vapor apresentou 7,01 g de cafeína e 8,74 g de ácidos clorogênicos totais em 100 g de produto. Foram estudados blends de café solúvel com 30% e 50% de Robusta PVA tratado com vapor com café Arábica. Diferença sensorial entre os blends com Robusta PVA tratado e não tratado foi percebida somente com a adição de 50% de PVA. O blend com 50% de café tratado com vapor foi preferido e bem aceito (nota média de 7,9 em escala de 10). O uso de café Robusta PVA tratado com vapor (sob condições brandas de tratamento, 2 bar/3 min) em café solúvel foi viável, sendo possível obter café solúvel para ser usado em um blend com 50% de café Arábica com um bom perfil de compostos bioativos e aceitação sensorial.

ABSTRACT Around 20% of Brazilian coffee production corresponds to defective beans (PVA), which decreases the quality of the coffee brews. Steam treatment has been reported as an alternative to improve the cup quality of coffee products. This research aimed to study the feasibility of using steamed Robusta PVA beans in instant coffee products. After the steam treatment (2 bar for 3 min), the Robusta PVA was dried, roasted, subjected to extraction in a pilot plant, and freeze-dried. The steamed and untreated Robusta PVA materials (raw, roasted, and instant coffees) and blends of instant Arabica coffee with PVA were characterized. The steamed Robusta PVA instant coffee presented 7.01 g caffeine and 8.74 g total chlorogenic acids in 100 g product. Instant coffee blends with 30% and 50% of steamed Robusta PVA in Arabica coffee were studied. A sensory difference between blends with steamed and untreated Robusta PVA was only perceived by the addition of 50% PVA. The blend with 50% of steamed coffee was preferred and well accepted (average grade of 7.9 on a 10-scale). The use of steamed Robusta PVA coffee (under mild steam treatment conditions, 2 bar/3 min) in instant coffee was viable, and it was obtained an instant coffee to be used in a blend with 50% of Arabica coffee with a good profile of bioactive compounds and sensory acceptance.

Resumo: O objetivo deste trabalho foi apresentar uma descrição sensorial de bebidas de café conilon (Coffea canefora) produzidas a partir de genótipos desenvolvidos para o Estado do Espírito Santo. Foram avaliados os genótipos 'Diamante ES8112', 'ES8122' e 'Centenária ES8132'. Nove amostras oriundas de três clones (genótipos) de cada cultivar, procedentes de duas regiões distintas do estado, foram analisadas. Uma equipe de testadores para a avaliação sensorial de café foi treinada para a obtenção do perfil descritivo e a seleção de termos. As bebidas de café foram descritas como apresentando uma maior intensidade dos atributos fragrância do pó de café, aroma característico da bebida, corpo, sabor característico e sabor residual, e uma menor intensidade de amargor, acidez, adstringência e defeitos. Os termos amargor, forte, encorpado, adstringência e sabor residual característico de café foram os mais relevantes na caracterização das bebidas das cultivares de C. canephora estudadas. A acidez é o atributo com maior impacto sobre a qualidade global da bebida de C. canephora. As bebidas dos clones das cultivares 'Diamante', 'ES8122' e 'Centenária ES8132' classificam-se como na faixa de qualidade tradicional, porém próxima à categoria superior.

Abstract: The objective of this work was to present a sensory description of conilon coffee (Coffea canephora) brews produced from genotypes developed for the state of Espírito Santo, Brazil. The genotypes 'Diamante ES8112', 'ES8122', and 'Centenária ES8132' were evaluated. Nine samples from three clones (genotypes) of each cultivar, from two different regions of the state, were analyzed. A panel of tasters for coffee sensory evaluation was trained to obtain a descriptive profile and to select terms. Beverages were described as showing a higher intensity of powder fragrance, characteristic aroma of coffee brew, body, characteristic flavor and aftertaste, and a lower intensity of bitterness, acidity, astringency, and defects. The terms bitterness, strong, body, astringency, and coffee aftertaste were the most relevant in the characterization of the beverages of the studied C. canephora cultivars. Acidity is the attribute with the greatest impact on the overall quality of C. canephora brew. The coffee brews of the clones of 'Diamante ES8112', 'ES8122', and 'Centenária ES8132' are classified as of traditional quality, but near the superior category.

The extraction of kahweol and cafestol involves saponification reaction. This step is important for the efficiency of the extraction as the diterpenes are susceptible to structural changes during hydrolysis. The microwave-assisted saponification has been successfully used in different matrices, but there is no previous report of the use of this technique in the saponification of diterpenes. Therefore, the effect of microwave-assisted saponification on the extraction of kahweol and cafestol in roasted coffee was evaluated. A 32 factorial experimental design was used in order to evaluate the effect of temperature (70, 80, and 90 ºC) and reaction time (4, 8, and 12 min). The quantification of diterpenes was performed by high-performance liquid chromatography and the results were compared to with those obtained by a method, which uses thermostatic bath for saponification. Temperature and time had a significant effect (p < 0.05) on diterpenes levels. For simultaneous saponification of kahweol and cafestol, the optimal reaction conditions were 80 ºC / 12 min. The use of microwave-assisted procedure lead to lower yields of kahweol (24%) and cafestol (35%) compared to reference method. However a significant reduction of reaction time (80%) was achieved, and the procedure also has the advantage of controlled process conditions and the possibility of extended scale.

Abstract The objective of this study was to assess the efficiency of Flash Profiling (FP) and Ranking Descriptive Analysis (RDA) methods regarding sensory characterization using star fruit-flavored drink as matrix. Sample A was used as a standard. Other three samples were prepared based on sample A, by adding sugar, citric acid, carboxymethylcellulose or dye. The same panel (twelve assessors) was used to carry out FP and, subsequently, RDA analysis. The qualitative training stage used in RDA method showed no difference regarding the assessors’ performance and panel consensus compared to FP. Both methods were efficient and discriminated samples in a similar way and in agreement with the physicochemical characterization. However, astringent and bitter aftertaste attributes were additionally used in sample description by RDA. The latter attribute was also relevant for samples discrimination in RDA. FP application was simpler and faster, mainly regarding time spent by the assessors; however, RDA provided more comprehensive description of samples.

Mixed flavor beverages represent a trend that is gaining the allegiance of potential fruit juice consumers. The present study proposed to prepare mixed flavor beverages and verify their consumer acceptance. Cajá beverage (sample A) was used as the standard. The other beverages were prepared by mixing the cajá-flavored product with other flavors: strawberry (B), pineapple (C), jabuticaba (D), mango (E) and cashew (F). The consumer profiles in the two regions studied were similar. Overall beverages B, A and F were the most accepted, with scores of 7.7, 6.4 and 6.2, respectively. Internal Preference Mapping showed that most of the consumers were located near beverages A, B and F, confirming the acceptance results. The consumers indicated appearance and flavor as the most appreciated characteristics in beverages A, B and F. Beverages A, B and F presented higher total soluble solids contents and viscosities than the other beverages. Consumer segmentation did not depend on the different levels of familiarity with the cajá flavor. Thus the preparation of mixed flavor beverages of cajá-strawberry and cajá-cashew is an excellent proposal because it presents flavors with good potential for marketing in different regions of Brazil.

Foi recentemente lançado, no Brasil, um café solúvel adicionado de café torrado e moído micronizado (finamente moído), mas não se observaram na literatura trabalhos que avaliem a reação do consumidor brasileiro frente a esse novo conceito de produto. Assim, o objetivo do estudo foi verificar o impacto das informações e das características da embalagem sobre a expectativa e aceitação de um café solúvel adicionado de café torrado micronizado. Dois cafés solúveis comerciais da mesma marca, um convencional e outro adicionado de café torrado micronizado (aqui denominado produto novo), foram avaliados através das técnicas grupo de foco e avaliação da expectativa, comparando-se os produtos e as embalagens correspondentes. A embalagem do café solúvel adicionado de café torrado micronizado foi menos apreciada nas sessões de grupo de foco. O produto novo não foi facilmente identificado como sendo um café solúvel, mostrando a necessidade de deixar claro o conceito do produto na embalagem. A bebida do produto novo mostrou uma boa aceitação sensorial, similar ao café solúvel convencional (p > 0,05). Somente para o produto convencional a aceitação foi influenciada por fatores extrínsecos (informações e características da embalagem), o consumidor assimilou a alta expectativa gerada pela maior familiaridade com o produto e/ou embalagem e aumentou sua aceitação na avaliação informada. Conclui-se que a embalagem do café solúvel adicionado de café torrado micronizado deve apresentar maior similaridade com a embalagem do produto convencional no que diz respeito a cores e ilustrações. A embalagem deve ainda conter informações claras quanto aos diferenciais do produto, tais como proximidade sensorial com o produto torrado e moído e a facilidade no preparo do café solúvel.

Recently a soluble coffee with added micronized (finely ground) roasted coffee was launched in Brazil, but no studies evaluating the reaction of Brazilian consumers to this new product concept could be found in the literature. Thus, the aim of this study was to evaluate the impact of the information and package characteristics on the expectation and acceptance of a soluble coffee with added micronized roasted coffee. Two commercial products from the same brand, one a conventional soluble coffee and the other a soluble coffee with added micronized roasted coffee (new product), were evaluated by the techniques of Focus group and expectation evaluation, comparing the products and their corresponding packages. The package of instant coffee with micronized roasted coffee was less appreciated in the Focus group sessions. The new product was not easily identified as a soluble coffee, showing the need to clarify the concept of the product on the package. The brew of the new product showed good sensory acceptance, similar to that of conventional soluble coffee (p > 0.05). The acceptance was only influenced by extrinsic factors (information and package characteristics) in the case of the conventional product, the consumers assimilating the high expectations generated by greater familiarity with the product and/or package, and increasing their acceptance on the informed evaluation. It was concluded that the package of soluble coffee with added micronized roasted coffee should be more similar to that of the conventional product with respect to colour and illustrations. The package should present clear information about the differentials of the product, such as greater sensory proximity with the ground roasted coffee and ease in preparing the soluble coffee.

O objetivo deste trabalho foi avaliar a influência da diversidade genética sobre a composição química de cultivares modernas e tradicionais de café arábica brasileiro. Cultivares tradicionais (Bourbon, Catuaí e Icatu) e modernas (Iapar 59, IPR 98, IPR 99 e IPR 103) foram cultivadas nas mesmas condições edafoclimáticas e submetidas a tratamentos pós-colheita padronizados. Determinaram-se os teores de sacarose, açúcares redutores, ácidos orgânicos (quínico, málico e cítrico), compostos fenólicos totais, ácido 5-cafeoilquínico, compostos nitrogenados (proteína, trigonelina e cafeína), lipídeos totais, cafestol e caveol. A diversidade genética confere variabilidade à composição do café e permite a discriminação entre cultivares tradicionais e modernas. As cultivares modernas apresentam maior teor de ácidos málico e 5-cafeoilquínico, lipídeos totais, caveol e trigonelina. Os parâmetros caveol e a relação caveol/cafestol são propostos como discriminadores entre cultivares modernas e tradicionais, uma vez que a introgressão de genes de Coffea canephora aumenta os teores de caveol e os valores da relação caveol/cafestol.

The objective of this work was to evaluate the influence of genetic diversity on the chemical composition of traditional and modern cultivars of Brazilian arabica coffee. Traditional (Bourbon, Catuaí and Icatu) and modern cultivars (Iapar 59, IPR 98, IPR 99, and IPR 103) were subjected to the same edaphoclimatic conditions, and to standardized post-harvest treatments. Contents of sucrose, reducing sugars, organic acids (quinic, malic, and citric), total phenolic compounds, 5-caffeoylquinic acid, nitrogenous compounds (protein, caffeine, and trigonelline), total lipids, cafestol, and kahweol were determined. Genetic diversity provides variability in coffee composition, allowing the discrimination between traditional and modern cultivars. Modern cultivars have higher contents of malic and 5-caffeoylquinic acids, total lipids, kahweol and trigonelline. The parameters kahweol and the kahweol/cafestol ratio are proposed as discriminators between traditional and modern cultivars, since the introgression of genes from Coffea canephora increase the kahweol content and the values of kahweol/cafestol ratio.

The objective of the research was to relate the physical and chemical characteristics of soymilk plain beverages to its sensory acceptance. Five commercial products and a new product formulated based on the less accepted sample were used. The overall acceptance was evaluated by 102 assessors using a 10-point hybrid hedonic scale. The hedonic scores ranged from 3.8 (sample E) to 7.0 (A). Most assessors (55%) preferred sample A, which was viscous (26.6 cp), dark (L* = 77.7), and slightly acidic (pH = 6.6). Sample C, which had lower solid content and higher acidity, was preferred by 29% of the assessors. These two beverages showed the greatest commercial potential of the products analyzed. The least-accepted sample (E), preferred by 8% of the assessors, had a lighter color (L* = 96.8), lower viscosity (13.5 cp), higher lipid content (2.2 g/100 g), and less protein (1.68 g/100 g) than the other products evaluated. A reformulation of the least preferred product (E) with the addition of maltodextrin and also vanilla and milk flavors increased its acceptance, yielding an average score of 7.2. Overall, it was observed that a soymilk plain beverage with higher viscosity, darker color, and higher protein content best meets consumer expectations.

Os teores de compostos fenólicos totais (CFT), flavonoides totais (FT) e ácido ascórbico (AA) foram determinados em 18 polpas de frutas congeladas, assim como a capacidade antioxidante na desativação do radical peroxila (ROO•), peróxido de hidrogênio (H2O2) e radical hidroxila (•OH). De acordo com a Análise de Componentes Principais (ACP), CFT e AA apresentaram correlação positiva com a capacidade de desativar o ROO• e o teor de FT apresentou correlação positiva com a capacidade de desativar o •OH e ROO•. Entretanto, a capacidade de desativar o H2O2 apresentou baixa correlação com FT, CFT e AA. A Análise Hierárquica de Agrupamentos (HCA) permitiu a separação das polpas de frutas em três grupos: o primeiro formado pela polpa de açaí, com elevado teor de FT (134,02 mg EC/100 g polpa) e maior desativação do ROO•, •OH e H2O2; o segundo pela polpa de acerola, com elevado teor de CFT (658,40 mg EAG/100 g polpa) e de AA (506,27 mg/100 g polpa); e o terceiro grupo formado pelas polpas de abacaxi, cacau, cajá, caju, coco, cupuaçu, goiaba, laranja, limão, manga, maracujá, melancia, pitanga, tamarindo, tangerina e umbu, que não puderam ser separadas considerando apenas os teores dos compostos bioativos e a propriedades antioxidantes.

The contents of total phenolic compounds (TPC), total flavonoids (TF), and ascorbic acid (AA) of 18 frozen fruit pulps and their scavenging capacities against peroxyl radical (ROO•), hydrogen peroxide (H2O2), and hydroxyl radical (•OH) were determined. Principal Component Analysis (PCA) showed that TPC (total phenolic compounds) and AA (ascorbic acid) presented positive correlation with the scavenging capacity against ROO•, and TF (total flavonoids) showed positive correlation with the scavenging capacity against •OH and ROO• However, the scavenging capacity against H2O2 presented low correlation with TF (total flavonoids), TPC (total phenolic compounds), and AA (ascorbic acid). The Hierarchical Cluster Analysis (HCA) allowed the classification of the fruit pulps into three groups: one group was formed by the açai pulp with high TF, total flavonoids, content (134.02 mg CE/100 g pulp) and the highest scavenging capacity against ROO•, •OH and H2O2; the second group was formed by the acerola pulp with high TPC, total phenolic compounds, (658.40 mg GAE/100 g pulp) and AA , ascorbic acid, (506.27 mg/100 g pulp) contents; and the third group was formed by pineapple, cacao, caja, cashew-apple, coconut, cupuaçu, guava, orange, lemon, mango, passion fruit, watermelon, pitanga, tamarind, tangerine, and umbu pulps, which could not be separated considering only the contents of bioactive compounds and the scavenging properties.

Commercial Brazilian regular and decaffeinated instant coffees (33 brands) were studied. The levels ranged from 0.47 to 2.15 g 100 g-1 for trigonelline, 0.38 to 2.66 g 100 g-1 for 5-caffeoylquinic acid (5-CQA), 0.24 to 4.08 g 100 g-1 for caffeine, and 0.253 to 0.476 (420 nm) for melanoidins. Variations in bioactive compound levels among batches were observed. There was no relationship between the drying process and the composition of the products. In general, Gourmet and decaffeinated coffees had higher trigonelline and 5-CQA but lower caffeine and melanoidin content than regular products.