RESUMEN
BACKGROUND: Extract of ciriguela residue was microencapsulated by spray-drying and freeze-drying using maltodextrin (M), gum arabic (GA) and their mixture (50% M; 50% GA on dry basis) as encapsulating agents. Total phenolic compounds (TPC), antioxidant activity, physicochemical properties, profile of phenolic compounds by HPLC with diode-array detection and storage stability were evaluated. RESULTS: TPC content of powders ranged from 306.9 to 451.2 mg gallic acid equivalent g-1 dry powder. The spray-dried powder prepared using GA as encapsulating agent had higher TPC content and antioxidant activity, whereas the freeze-dried powder had lower moisture and water activity. Spray-dried microcapsules had spherical shape, whereas freeze-dried products had irregular structures. The profile of phenolic compounds identified in samples was similar, with rutin (342.59 and 72.92 µg g-1 ) and quercetin (181.02 and 43.24 µg g-1 ) being the major compounds in liquid and freeze-dried extracts, respectively, whereas myricetin (97.41 µg g-1 ) was predominant in spray-dried ones. Storage stability tests carried out for 45 days at 7 or 25 °C revealed no statistically significant difference in TPC. CONCLUSION: Ciriguela residue can be considered a source of TPC and used as ingredient with good antioxidant activity in the food industry. © 2023 Society of Chemical Industry.
Asunto(s)
Antioxidantes , Fenoles , Antioxidantes/química , Polvos/química , Fenoles/química , Liofilización , Extractos Vegetales/química , Goma Arábiga/químicaRESUMEN
Microcapsules of ciriguela peel extracts obtained by ultrasound-assisted extraction were prepared by spray drying, whose results were compared with those of freeze-drying as a control. The effects of spray-drying air temperature, feed flow rate and ratio of encapsulating agents (maltodextrin and arabic gum) were studied. Encapsulation efficiency, moisture content, total phenolic compounds (TPC), water activity, hygroscopicity, solubility, colorimetric parameters, phenolic profile by HPLC/DAD, simulated gastrointestinal digestion and morphology of spray-dried and freeze-dried microcapsules were evaluated, as well as their stability of TPC during 90 days storage at 7 and 25 °C. Spray-dried extract showed higher encapsulation efficiency (98.83%) and TPC (476.82 mg GAE g-1) than freeze-dried extract. The most abundant compounds in the liquid extract of ciriguela peel flour were rutin, epicatechin gallate, chlorogenic acid and quercetin. Rutin and myricetin were the major flavonoids in the spray-dried extract, while quercetin and kaempferol were in the freeze-dried one. The simulated gastrointestinal digestion test of microencapsulated extracts revealed the highest TPC contents after the gastric phase and the lowest one after the intestinal one. Rutin was the most abundant compound after the digestion of both spray-dried (68.74 µg g-1) and freeze-dried (93.98 µg g-1) extracts. Spray-dried microcapsules were of spherical shape, freeze-dried products of irregular structures. Spray-dried microcapsules had higher phenolic compounds contents after 90 days of storage at 7 °C compared to those stored at 25 °C, while the lyophilized ones showed no significant difference between the two storage temperatures. The ciriguela agro-industrial residue can be considered an interesting alternative source of phenolic compounds that could be used, in the form of bioactive compounds-rich powders, as an ingredient in pharmaceutical, cosmetic and food industries.
Asunto(s)
Quercetina , Secado por Pulverización , Cápsulas , Rutina , HarinaRESUMEN
Catfish (Sciades herzbergii) are widely captured in Brazilian Northeast but have low commercial value. The processing of catfish into an innovative product with longer shelf life can add value to the fish and improve sustainability. The objective of this study was to investigate the stability during 60 days of refrigerated storage smoked sausages produced by two different smoking processes (traditional smoking [TS] and liquid smoking [LS]). The smoking processes affected fat and ash contents, hardness, and CIE (Commission Internationale de L'Eclairage) color (L* and b* values). TS sausages had higher fat content and yellowness (b* value). LS sausages had higher ash content (15 days of storage) and lightness (L* value). The sausage's hardness was higher at 45 days of storage for TS and at 60 days for LS sausages. During refrigerated storage, there were decreases in crude protein (309.12-263.49 g/kg, 1-30 days, respectively), water holding capacity (89.77%-87.39%, 1-45 days, respectively), and redness (a* value) (10.35-6.09, 1-30 days, respectively), and increases in hardness (TS = 31.92-55.92 N, 1-45 days, respectively; LS = 32.88-61.18N, 160 days, respectively) and TBARS values (1.56-2.38 mg malonaldehyde/kg, 1-60 days, respectively). The microbial quality was kept within Brazilian legislation limits. Therefore, liquid smoked catfish sausage consists of a convenient innovative product, which is easier to process and control and provides a product with good physicochemical, microbial, and biochemical characteristics for up to 60 days of storage. PRACTICAL APPLICATION: Catfish, a low commercial value fish (by catch from shrimp operations), can be processed into a high value smoked sausage. Liquid smoking was easier to process, environment friendly, and easier to control compared to traditional smoking. It provided a nutritional, easy to prepare at home, and microbial safe product with a shelf life under refrigeration up to 60 days. It can be successfully used to warrant sustainability in the fish chain.
Asunto(s)
Productos Pesqueros/análisis , Manipulación de Alimentos/métodos , Animales , Brasil , Bagres , Proteínas de Peces/química , Manipulación de Alimentos/instrumentación , Almacenamiento de Alimentos , Dureza , Refrigeración , HumoRESUMEN
The objective of this study was to evaluate carcass characteristics, meat quality, and organ and viscera weight of forty male sheep, not castrated, initially weighed 26.5 ± 1.85 kg, and confined for 100 days (44 days for the adjustment period and 56 days of the experimental period). The treatments were four levels of replacement of Bermuda grass hay with alfalfa hay (0, 200, 400, and 600 g/kg, based on dry matter). The design was randomized blocks (one lighter group and other heavier group) with 10 animals in each treatment. There were no effects on weight gain or carcass parameters. However, an increase was observed on dry matter intake (g/day), crude protein intake (g/day), empty body weight (kg), and subcutaneous fat thickness (mm). There was also an increase in total organ weights in kg and g/kg. The tissue composition of the leg had a quadratic effect on the bone tissue weight (g) and linear effect on adipose tissue relative (g/kg) and muscle-fat relations. There was also a quadratic effect on bone tissues (g/kg) and muscle-bone relations. Likewise, there was a quadratic effect on the qualitative characteristics of meat (measure of luminosity), with the replacement of Bermuda grass hay with alfalfa hay in sheep feed. The replacement of Bermuda grass hay with alfalfa did not change carcass characteristics and meat quality.
Asunto(s)
Alimentación Animal/análisis , Composición Corporal , Cynodon , Carne/normas , Medicago sativa , Tejido Adiposo , Fenómenos Fisiológicos Nutricionales de los Animales , Animales , Dieta/veterinaria , Masculino , Ovinos , Aumento de PesoRESUMEN
The objective of this study was to evaluate the effect of the replacement of corn by cassava dregs (0, 33, 66, and 100%) in the diet of lamb on physicochemical parameters, fatty acid profile, and sensory attributes of meat. Forty male non-castrated Santa Inês crossbred lambs with an initial average weight of 20 ± 1.87 kg were slaughtered after 70 days. The physicochemical parameters and chemical composition of meat were not affected by the diets. Eicosenoic (C20:1n-9) and linolenic (C18:3n-3) acids increased linearly and there was a linear decreasing effect for the flavor score with increasing cassava dregs in the diets. The replacement of corn by cassava dregs did not influence omega-6:omega-3 ration or the total desirable fatty acids, as well as the color, aroma, tenderness, juiciness, or overall evaluation scores. Cassava dregs may be added in the diets of lambs, without negative effects on physicochemical characteristics, chemical composition, and fatty acid indexes, with positive effects on unsaturated fatty acid content. However, the total replacement of corn altered the sensory attributes and decreased purchase intent of the meat.
Asunto(s)
Alimentación Animal/análisis , Manihot , Carne/análisis , Gusto , Animales , Peso Corporal , Comportamiento del Consumidor , Dieta/veterinaria , Ácidos Grasos , Masculino , Carne/normas , OvinosRESUMEN
It was aimed to evaluate the effects of replacement of wheat bran in lambs' diets with spineless cactus (0, 33, 66, and 100%) in a lamb's diet on the physicochemical parameters, fatty acids and sensory analyasis of meat. The evaluation utilized 36 loins and legs from F1 ½ Dorperâ¯×⯽ Santa Inês lambs, with an average initial body weight of 19.5⯱â¯1.6â¯kg, were slaughtered after 70â¯days of confinement. Were found average values of 5.70, 11.27â¯N, 55.44â¯mg/100â¯g, of meat pH, shear force, and cholesterol, respectively. However, stearic acid, linoleic, linolenic, eicosatrienoic and eicosapentaenoic which linearly decreased. The color, aroma, texture, flavor, juiciness and global acceptance of meat were acceptable by the evaluators, additionally, they said they would buy meat coming of animals fed with 100% replacement. It is recommended that wheat bran is replaced by spineless cactus in the diet of lambs when this shows to be an ingredient with better cost-benefit ratio compared to wheat bran.
Asunto(s)
Alimentación Animal/análisis , Cactaceae , Carne Roja/análisis , Oveja Doméstica/fisiología , Adolescente , Adulto , Animales , Brasil , Color , Comportamiento del Consumidor , Dieta/veterinaria , Ácidos Grasos/análisis , Femenino , Humanos , Masculino , Odorantes , GustoRESUMEN
The investigation aimed to compare the knowledge about food plants in rural communities of the Caatinga. The study was conducted in two rural communities in northeastern Brazil. Data collection utilized different ethnobotanical methods, including free listing, semi-structured interviews, and recall. Native species are less frequently consumed as food in both locations. Fruits are the most frequently cited wild resource, but in practice, most of this food availability potential is wasted. Despite community knowledge about wild species with potential food, few species are actually utilized, and thus, many plants are not included in the diets of the populations studied.
Asunto(s)
Dieta , Etnobotánica , Conducta Alimentaria , Conocimientos, Actitudes y Práctica en Salud , Plantas Comestibles , Adulto , Brasil , Femenino , Frutas , Humanos , Entrevistas como Asunto , Masculino , Recuerdo Mental , Población Rural , Estaciones del Año , ÁrbolesRESUMEN
Lectins, proteins that recognize carbohydrates, have been immobilized on inert supports and used in the screening or purification of glycoproteins. Anacardium occidentale bark infusion has been used as a hypoglycemic agent in Brazil. The toxicity of natural products may be evaluated determining their capability to alter the biodistribution of technetium-99M ((99m)Tc). This work reports the isolation and characterization of a lectin from A. occidentale bark (AnocBL), its evaluation as an affinity support for glycoprotein isolation and lectin effect on the uptake of (99m)Tc by rat adipocytes. AnocBL was isolated from 80 % ammonium sulphate supernatant by affinity chromatography on fetuin-agarose. SDS-PAGE showed a single protein band of 47 kDa. The monossacharide L-arabinose and the glycoproteins fetuin, asialofetuin, ovomucoid, casein, thyroglobulin, peroxidase, fetal bovine serum and IgG inhibited the activity. The lectin activity was stable until 70 °C and at a pH range of 3.0-7.5. AnocBL-Sepharose column bound fetuin indicating that the lectin matrix may be used to obtain glycoconjugates of biotechnological interest. In vitro assay revealed that glucose and insulin increase (99m)Tc uptake by rat adipocytes. AnocBL decreases (99m)Tc uptake, and this effect was not detected in the presence of glucose. Fetuin inhibited AnocBL effect in all insulin concentrations.
Asunto(s)
Adipocitos/metabolismo , Anacardium/química , Lectinas/aislamiento & purificación , Lectinas/farmacología , Corteza de la Planta/química , Tecnecio/metabolismo , Adipocitos/efectos de los fármacos , Anacardium/metabolismo , Animales , Transporte Biológico/efectos de los fármacos , Células Cultivadas , Femenino , Glucosa/metabolismo , Insulina/metabolismo , Lectinas/química , Lectinas/metabolismo , Masculino , Corteza de la Planta/metabolismo , Ratas , Ratas WistarRESUMEN
Plant domestication is an evolutionary process guided by human groups who modify the landscape for their needs. The objective of this study was to evaluate the phenotypic variations between populations of Spondias tuberosa Arruda (umbuzeiro) when subjected to different local landscape management strategies. The influence of the landscape management system on these populations was evaluated in five identified regional units (mountains, base of mountains, pastures, cultivated areas and home gardens). Ten individuals were randomly selected from each region and subjected to morphological and chemical fruit analysis. The diversity index, based on Simpson's index, was determined for the different populations. We then evaluated the morphological differences between the individual fruits from the distinct landscape areas. We observed no significant differences in morphological diversity between the areas studied. Our data suggest that the umbuzeiro specimens in this region may be in the process of incipient domestication.
Asunto(s)
Agricultura/métodos , Anacardiaceae/clasificación , Anacardiaceae/genética , Anacardiaceae/crecimiento & desarrollo , Anacardiaceae/fisiología , Brasil , Conservación de los Recursos Naturales , Ambiente , Variación Genética , FenotipoRESUMEN
Este trabalho teve como objetivo determinar a melhor formulação de geléia mista de manga espada e acerola e verificar o efeito dos tratamentos sobre as características físico-químicas e sensoriais do produto. Foram elaboradas cinco formulações contendo diferentes proporções de caldo de manga (M) (75 %, 60 %, 50 %, 40 %, 25 %), de acerola (A) (25 %, 40 %, 50 %, 60 %, 75 %), pectina (0,1 %; 0,125 %; 0,2 %; 3 %; 0,6 %), ácido cítrico (0,1 %; 0,125 %; 0,25 %) e açúcar (30 %). As geléias obtidas foram submetidas a teste sensorial pelo método de ordenação - preferência ao Teste de Análise Descritiva Quantitativa (ADQ) pelo método perfil de características. A acidez total titulável , pH, ácido ascórbico, sólidos solúveis totais (SST), carotenóides totais, polifenóis (antocianinas, flavonóis, e fenólicos totais) e cor foram determinadas e os resultados submetidos à análise de variãncia (ANOVA) e ao teste de Tukey ao nível de 5 %. Todas as geléias foram classificadas como "extra" uma vez que o teor de SST situou-se entre 63,5 a 64 Brix. As geléias G7 (75 % M: 25 % A), G5 (60 % M: 40 % A) e G3 (50 % M:50 % A) foram as mais apreciadas pelos julgadores, destacando-se a G5 e a G7 por reunirem, de forma satisfatória, todos os atributos de qualidade. As geléias mistas apresentaram teor elevado de ácido ascórbico e quantidades significates de carotenóides e polifenóis. As geléias com maior proporção de manga na formulação apresentaram as melhores características sensoriais e forte potencial antioxidante em função do teor de ácido ascórbico, carotenóides totais e polifenóis. Assim, a acerola (com teores significativos desses fitoquímicos bioativos) pode ser vista como agente enriquecedor na produção de geléias mistas com manga.
Asunto(s)
Ácido Ascórbico , Análisis de los Alimentos , Tecnología de Alimentos , Mermeladas de Frutas , Malpighiaceae , Modalidades SensorialesRESUMEN
Considering that food processing can affect the level of nutrients in relationto a fresh food, particularly the content of antioxidants and, consequently,the antioxidant activity of these compounds, this study was carried outto investigate the antioxidant capacity of vegetables submitted to cookingin steam. Methanol extracts were screened for their antioxidant activityby two tests: DPPH free radical scavenging and β-carotene/linoleic acidassay. Spinach, carrot, spring greens and caulifl ower were found tohave the highest free radical scavenging activities (>70%), similar to thesynthetic antioxidant BHT. Pumpkins exhibited the lowest free radicalscavenging activities, without differing from the activities of green beans,white onion, potato and cabbage (<60%), after 15 minutes of reaction. At the end of the reaction period (60 minutes), cabbage and potato increasedtheir scavenging capacity to values between 60 and 70%, while the othersmaintained a low scavenging capacity (<60%). In β-carotene/linoleic acidassay, the antioxidant activity of broccoli and pumpkins was consideredstrong (> 70%) and did not statistically differ from BHT. Except for the greenbeans and spinach, with moderate antioxidant capacity (60 - 70%), theother vegetables presented an antioxidant activity (<60%) lower than BHT. Based on the results, it was evidenced that all cooked vegetables exhibited antioxidant property, but in different extent. Thus, it can be inferred that cooking in steam did not dramatically affect the antioxidant property of the vegetables.
Considerando que el procesamiento de los alimentos afecta los nutrientes que contienen los alimentos frescos, particularmente los compuestos antioxidantes y la acción queejercen, este estudio se propuso para determinar la capacidad antioxidante de hortalizas cocinadas al vapor. Con ese fin se determino la actividad antioxidante de extractos metanólicosde las hortalizas cocidas por medio de dos ensayos: actividad secuestrante del radical DPPH y co-oxidación del β-caroteno / ácido linoleico. Espinaca, zanahoria, col y coliflor presentaron elevada capacidad de secuestro delradical DPPH (>70%), semejante al antioxidante sintético BHT. Calabaza presentó la más baja capacidad de captación de radical DPPH, aligual que judías verdes, cebolla blanca, papa y repollo (<60%), a los 15 minutos de reacción. Al fi nal del tiempo de reacción (60 minutos),repollo y papa aumentaron su capacidadde captación del radical DPPH (60 - 70%), mientras que las demás hortalizas mantuvieronsu actividad baja (<60%). En el experimento de la co-oxidación del β-caroteno/ácido linoleico, brócoli y calabaza presentaron fuerte actividad antioxidante (> 70%), sin diferir estadísticamente de BHT. Con excepción de las judías verde y espinaca, con moderada capacidad antioxidante (60 - 70%), las otras hortalizas presentaron una acción débil (<60%). Los resultados obtenidos muestran quetodos las hortalizas cocidas presentan acción antioxidante en diferentes rangos. De este modo, se puede deducir que la cocción a vapor, no afecta de manera radical la propiedadantioxidante de los vegetales.
Considerando que o processamento dealimentos pode exercer efeitos sobre o nível de nutrientes, particularmente no que tange ao teor de compostos antioxidantes e sua atividade antioxidante, este trabalho teve comoobjetivo avaliar a capacidade antioxidante de hortaliças submetidas à cocção em vapor. Extratos metanólicos de hortaliças cozidas foram submetidos à determinação da atividadeantioxidante por dois métodos: sequestro do radical estável 1,1-difenil-2-picrilhidrazil (DPPH) e sistema de cooxidação do β-caroteno/ácido linoleico. A capacidade de sequestro do radical DPPH exibida pelo extrato de espinafre, cenoura, couve-folha e couve-fl or (>70%) foisemelhante a do antioxidante sintético BHT. A menor capacidade de sequestro foi exibida pelo extrato de jerimum sem, contudo, diferir da vagem, cebola branca, batata inglesa e repolho (<60%), aos 15 minutos da reação. Ao final do tempo de reação (60 minutos),o repolho e a batata-inglesa elevaram sua capacidade de sequestro para valores entre 60 e 70%, enquantoque as demais mantiveram capacidade de sequestro inferior a 60%. A ação antioxidante do brócolis e jerimum determinada em sistemade cooxidação β-caroteno/ácido linoleico foi superior 70%, não diferindo estatisticamente do BHT. Com exceção da vagem e espinafre,com capacidade antioxidante moderada(60 - 70%), as demais hortaliças apresentaram ação antioxidante (<60%) inferior a do BHT.Com base nos resultados obtidos, evidenciase que todas as hortaliças cozidas exibiram propriedade antioxidante, entretanto a açãofoi diferenciada entre elas. Assim, pode-se inferir que o calor aplicado não afetou de forma drástica a propriedade antioxidante das hortaliças.
Asunto(s)
Antioxidantes/química , Verduras , Tratamiento Térmico/métodos , Plantas/química , Interpretación Estadística de DatosRESUMEN
Não existem dúvidas de que a busca pela qualidade tornou-se uma das preocupações mais eminentes das empresas que procuram a satisfação de seus clientes. A necessidade de se implantar um sistema de qualidade, baseado nas exigências da legislação, despertou o interesse de uma empresa de entreposto de carnes e derivados da cidade de Recife em elaborar o Manual de Boas Práticas de Manipulação, junto a um programa de treinamento, usando como método, um jogo interativo de perguntas e respostas com premiação aos participantes. Foi obtido um feedback com resultados positivos, tendo em vista que os funcionários voltaram ao trabalho mais motivados e com o comprometimento de mudar as atitudes erradas cometidas anteriormente.
Asunto(s)
Capacitación en Servicio , Calidad de los Alimentos , Buenas Prácticas de Manipulación , Cursos de Capacitación , BrasilRESUMEN
Extratos aquoso e acetônico de 15 frutas foram submetidos a ensaios para investigar a habilidade de seqüestrar o radical estável 1,1-difenil-2-picrilhidrazil (DPPH) e a capacidade de inibir a oxidação em sistema modelo β-caroteno/ácido linoléico. Todas as frutas exibiram propriedade antioxidante, entretanto a ação foi diferenciada entre elas. O extrato aquoso da acerola, caju, mamão "Formosa", mamão Havaí, laranja pêra e goiaba foram os mais eficazes (superior a 70 por cento), enquanto que o do abacaxi, laranja cravo, manga rosa, melão espanhol, melão japonês, melão orange flesh e pinha apresentaram ação moderada (60-70 por cento) e o da manga espada e melancia exibiram a mais fraca capacidade de seqüestrar o radical DPPH. Os extratos acetônico da acerola, caju, pinha e goiaba exibiram uma forte capacidade de seqüestrar o radical DPPH (superior a 70 por cento). Em sistema modelo β-caroteno/ácido linoléico, o extrato aquoso da pinha e o acetônico da goiaba exibiram moderada capacidade antioxidante (60-70 por cento) enquanto que a acerola (extrato aquoso) e o mamão formosa (extrato acetônico) os menores percentuais. Frente à capacidade antioxidante exibida, as frutas podem ser apontadas como fontes de antioxidantes naturais, destacando-se a acerola, caju, mamão Formosa, mamão Havaí, goiaba, laranja pêra, e a pinha por terem apresentado uma potente capacidade antioxidante.
Aqueous and acetone extracts from 15 fruits have been screened for antioxidant activity using DPPH method and ß-carotene/linoleic acid model. All fruits studied showed antioxidant activity, but in different extent. Acerola, cashew-apple, papaya "formosa", papaya "solo", orange and guava showed the higher antioxidant activity (>70 percent) in DPPH method, followed by pineapple, bergamont, mango "rosa", melon "reticulares", melon "inodorus", melon "orange flesh" and sugar-apple aqueous extract (moderate, 60-70 percent) and mango "espada" and watermelon aqueous extract, the lowest activity. Acerola, cashew-apple, sugar-apple and guava acetone extracts exhibited higher scavenging activity toward DPPH radicals (>70 percent).β-carotene/linoleic acid model index of sugar-apple aqueous extract and guava acetone extract demonstrated moderate antioxidant activity (60-70 percent), meanwhile acerola aqueous extract and papaya "formosa" acetone extract the lower. According to antioxidant activity, fruits can be indicated as natural antioxidants sources, pointing out acerola, cashew-apple, papaya "solo", papaya "formosa", guava, orange and sugar-apple as the highest in antioxidant capacity.
Asunto(s)
Antioxidantes/análisis , Frutas/química , Naranja de Acridina , Anacardium , Ananas , Carica , Citrullus , Cucumis melo , Malpighiaceae , Mangifera , PsidiumRESUMEN
Produtos sucedâneos, como abóbora, batata doce ou mandioca, podem substituir parcialmente a farinha de trigo na fabricação de massas alimentícias frescas e secas, sem afetar a qualidade do produto final e sem precisar fazer grandes modificações. Tendo em vista essa premissa, a substituição da parte da farinha de trigo utilizada na elaboração de pães, por produtos alternativos, poderia contribuir para o incremento da oferta protéica de um produto de consumo tradicional e de custo acessível, mesmo aos segmentos menos favorecidos da população. A padronização de técnicas físicas e sensoriais auxilia na interpretação dos padrões de identidade e qualidade dos pães de forma. O presente trabalho teve como objetivo propor uma metodologia, através de testes físicos e sensoriais, para avaliar a qualidade dos pães de forma de abóbora, de batata doce e de macaxeira. Para aplicar a metodologia, foram analisadas, em quatro repetições, diferentes amostras de pão de forma. Nos testes físicos foram analisadas as variáveis: massa, volume, volume específico e densidade. A avaliação de qualidade foi realizada através da análise descritiva qualitativa. Os descritores de qualidade analisados foram: cor da crosta, forma e simetria, cor do miolo, textura, sabor e aroma. Os resultados mostraram que a massa média dos pães foi de 887,5g pão padrão; 833,75g pão de abóbora; 863,7g pão de batata doce; 883,7g pão de macaxeira. O volume específico e densidade apresentaram valores médios de: para o pão padrão (3015 cm³; 3,40 cm³/g; 0,44g/cm³); para o pão de abóbora (1730 cm³; 2,07 cm³/g; 0,25g/cm³; para o pão de batata doce (2535 cm³; 2,94 cm³/g; 0,34g/cm³) e para o pão de macaxeira (2742,5cm³; 3,13 cm³/g; 0,38g/cm³, respectivamente). Os resultados da análise sensorial indicaram que todos os pães ficaram na faixa de boa qualidade. Sendo assim, a adição de produtos sucedâneos na proporção de 30 por cento para a produção de pão de forma é aceitável.
Asunto(s)
Pan , Análisis de los Alimentos , Normas de Calidad de los AlimentosRESUMEN
OBJETIVO: Considerando a importância dos compostos fenólicos em alimentos e que o broto de feijão-mungo vem sendo incluído na culinária brasileira, este estudo teve como objetivo quantificar o teor de fenólicos totais deste vegetal e avaliar a ação antioxidante do seu extrato aquoso. MÉTODOS: Os compostos fenólicos foram extraídos por quatro sistemas de solventes e dois métodos de extração, os quais foram diferenciados no tempo (2 e 1h) e número de extrações (2 e 3 extrações). Os fenólicos totais dos extratos foram quantificados por método espectrofotométrico. RESULTADOS: Os extratos obtidos com água à temperatura ambiente (28ºC), nos dois métodos de extração, foram os que apresentaram maior quantidade de fenólicos totais, sem contudo apresentar diferença significativa entre eles. O método II, que consistiu de três extrações em 1h, pode ser considerado o melhor por ter utilizado menor tempo de extração. O extrato aquoso em sistema modelo b-caroteno/ácido linoléico exibiu ação antioxidante (48,07 por cento de inibição da oxidação), entretanto foi inferior ao padrão BHT. CONCLUSAO: O broto de feijão-mungo possui considerável quantidade de fenólicos totais, compostos responsáveis por sua ação antioxidante, cujo consumo pode proporcionar efeitos benéficos à saúde.