38 research outputs found

    How batter formulation can modify fried tempura-battered zucchini chemical and sensory characteristics?

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    Tempura-fried vegetables are widely consumed and are greatly appreciated because of their characteristic dry and crispy crust, flavor and a golden–brown color. This study examined the effect of slice thickness, frying time and partial ingredient substitution in tempura batter with maltodextrin, ethanol, baking powder and cornflour on the rheological characteristics, moisture, oil uptake, color, texture and sensory characteristics of tempura-fried zucchini. The results showed an improved golden–brown coloring of the crust without affecting oil uptake when maltodextrin was included in the batter formulation. Moreover, dough viscosity and % pick-up lowered with maltodextrin addition. The partial substitution of water and wheat flour with ethanol, cornflour and baking powder resulted in a crispier and rougher crust that remained more stable over time but with less moisture and higher oil uptake. The substitution of certain tempura batter ingredients depending on the desired purpose could represent an interesting strategy to improve the quality of battered fried vegetables

    Herramientas culinarias en ERC. Cómo reducir el contenido de potasio y fósforo en los vegetales

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    Introducción: Los estudios epidemiológicos indican que entre el 30-50% de los pacientes con enfermedad renal crónica (ERC) presentan signos de malnutrición1, caracterizados por un desgaste proteico-energético (DPE). Entre sus muchas posibles causas se encuentran la alta prevalencia de anorexia de estos pacientes y la baja ingesta de nutrientes por restricciones dietéticas severas2, 3. Por otro lado, cada vez son más los profesionales sanitarios que manifiestan la importancia de integrar una intervención dietético-nutricional en el tratamiento de la enfermedad, con el objetivo de mejorar el pronóstico evolutivo y reducir los aspectos farmacológicos vinculados a ella4. La intervención dietético-nutricional propuesta apuesta por acercar las recomendaciones dietéticas a las de la población general, con dietas menos restrictivas que las tradicionales, asegurando la ingesta calórica adecuada, controlando la ingesta de potasio y fósforo, especialmente a través de alimentos de origen vegetal. Cabe remarcar que el éxito de esta intervención dietético-nutricional pasa por lograr una buena adherencia a la dieta por parte del paciente, a través del mantenimiento del placer de comer y evitando el aislamiento social, algo que las recomendaciones dietéticas tradicionales, en general muy restrictivas y laboriosas, no permiten..

    Herramientas culinarias en ERC. Cómo reducir el contenido de potasio y fósforo en los vegetales

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    II Congreso de Alimentación, Nutrición y Dietética. Avances en Nutrición y Dietética Clínica: Prevención, Tratamiento y Gestión - Rol del Dietista-Nutricionist

    Aceite de oliva virgen extra del Somontano: evaluación de las modificaciones físico- químicas tras la fritura doméstica de patatas prefritas congeladas

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    The behavior of Somontano extra virgin olive oil (obtained from Empeltre and Arbequina olive varieties) in the domestic deep frying of prefried frozen potatoes was studied by submitting the olive oil to successive frying cycles. After different frying cycles physico-chemical modifications were monitored through the determination of several chemical (iodine value, total phenols content) and physical parameters (viscosity and ultraviolet spectra). An increase in viscosity and a decrease in iodine value, total phenol content and an increase in absorbance at 235, 269 y 280 nm were observed. In general, Somontano olive oil was revealed appropriate for domestic frying because of the high number of frying cycles permitted before reaching the polar compound limit established by Spanish legislation.Se estudió el comportamiento del aceite de oliva virgen extra del Somontano (obtenido a partir de aceitunas de las variedades Empeltre y Arbequina) en la fritura doméstica de patatas prefritas congeladas por inmersión, sometiendo al aceite a ciclos sucesivos de fritura. Tras los distintos ciclos se monitorizaron las modificaciones físico-químicas mediante la determinación de diversos parámetros químicos (indice de yodo, contenido en fenoles totales) y físicos (viscosidad y espectros ultravioleta). Se observó un aumento de la viscosidad, y una disminución en el índice de yodo, en el contenido de fenoles, así como el aumento de la absorbancia en el ultravioleta a 235, 269 y 280 nm. Sin embargo, el aceite del Somontano se reveló como muy adecuado para la fritura doméstica por el elevado número de ciclos de fritura (66) que se pudieron realizar sin sobrepasar el límite de compuestos polares establecido por la legislación

    Obstáculos para la movilidad académica con el programa Erasmus+: Diferencias entre grados universitarios [Barriers to academic mobility with Erasmus+ programme: Differences between bachelor degrees]

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    Pese al interés creciente que presenta la movilidad académica internacional de los estudiantes universitarios europeos para su inserción profesional posterior, el porcentaje de estudiantes españoles que participan en el programa Erasmus es todavía pequeño. El objetivo de este trabajo fue determinar los principales obstáculos para la movilidad Erasmus percibidos por estudiantes de grado que no han participado en este programa, valorando la existencia de diferencias en función del grado (Sanitario vs. Ciencias Sociales). Se utilizó una encuesta auto-administrada elaborada para un estudio europeo previo en el que participó España. Los resultados muestran el impacto, a nivel general, de la falta de información sobre temas relevantes como: la calidad de la educación en el extranjero, o cómo van a ser evaluados, así como, las barreras económicas por becas insuficientes y retrasos en el pago de las mismas. Los obstáculos que mejor diferencian a los estudiantes de ambos grados están relacionados con la ordenación académica del grado, en concreto, bajo nivel de formación en inglés y presencia de asignaturas anuales, además de características personales del estudiante. Para incrementar la participación, se debería incidir en informar más y comunicar mejor además de incluir modificaciones en el programa académico de los grados que faciliten la movilidad internacional. [Despite the growing interest that presents academic international mobility for European University students for their later in life job prospects, the rate of Spanish students participating in the Erasmus programme is still small. The objective of this research was to determine the main barriers perceived by bachelor students who had not participated in the Erasmus programme assessing the differences between two bachelor degrees (Health vs. Social Sciences). A self-administered survey including reasons not to participate was used that had been set up for a previous European study including Spain. Results reveal the overall impact of lack of information on relevant issues such as the quality of university education system abroad and how they will be evaluated as well as financial barriers such as insufficient Erasmus grants or delays in the first grant payment. The barriers that better differentiate both bachelor degrees students are related to the bachelors’ curriculum i.e. insufficient training in English and presence of annual (vs. semester) courses as well as personal features. To increase participation, the focus should be on improving information and communication both on academic and financial issues, and changes in the bachelors’ curricula.

    Identifying SARS-CoV-2 'memory' NK cells from COVID-19 convalescent donors for adoptive cell therapy

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    COVID-19 disease is the manifestation of syndrome coronavirus 2 (SARS-CoV-2) infection, which is causing a worldwide pandemic. This disease can lead to multiple and different symptoms, being lymphopenia associated with severity one of the most persistent. Natural killer cells (NK cells) are part of the innate immune system, being fighting against virus-infected cells one of their key roles. In this study, we determined the phenotype of NK cells after COVID-19 and the main characteristic of SARS-CoV-2-specific-like NK population in the blood of convalescent donors. CD57+ NKG2C+ phenotype in SARS-CoV-2 convalescent donors indicates the presence of 'memory'/activated NK cells as it has been shown for cytomegalovirus infections. Although the existence of this population is donor dependent, its expression may be crucial for the specific response against SARS-CoV-2, so that, it gives us a tool for selecting the best donors to produce off-the-shelf living drug for cell therapy to treat COVID-19 patients under the RELEASE clinical trial (NCT04578210)

    Molecular Gastronomy in Spain

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    [EN] Beyond the overwhelming international success of Ferrán Adria, Spain has been one of the countries with a more active implication in molecular gastronomy as a scientific discipline but also in the use of ingredients, technologies, and equipment from the scientificand technological universe in the culinary area. Nowadays, this is a well-established discipline in Spain, with a number of research groups covering related topics, several companies commercializing appliances and additives worldwide, and renowned international chefs and many restaurants and companies committed to the collaboration with scientists for facing the future of Spanish gastronomyThe authors would like to thank the Ministerio de Ciencia e Innovación (Spain) for funding the Collaborative Network “INDAGA” (AGL2007-28589- E/ALI; AGL2009-05765-E), which enabled their collaboration.García Segovia, P.; Garrido, MD.; Vercet Tormo, A.; Arboleya, JC.; Fiszman Dal Santo, S.; Martínez Monzó, J.; Laguarda, S.... (2014). Molecular Gastronomy in Spain. Journal of Culinary Science and Technology. 12(4):279-293. https://doi.org/10.1080/15428052.2014.914813S27929312

    Ultrasound-assisted extraction of natural products

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    Ultrasound-assisted extraction (USAE) is an interesting process to obtain high valuable compounds and could contribute to the increase in the value of some food by-products when used as sources of natural compounds. The main benefits will be a more effective extraction, thus saving energy, and also the use of moderate temperatures, which is beneficial for heat-sensitive compounds. For a successful application of the USAE, it is necessary to consider the influence of several process variables, the main ones being the applied ultrasonic power, the frequency, the extraction temperature, the reactor characteristics, and the solvent-sample interaction. The highest extraction rate is usually achieved in the first few minutes, which is the most profitable period. To optimize the process, rate equations and unambiguous process characterization are needed, aspects that have often been lacking. © 2011 Springer Science+Business Media, LLC.The authors thank the Generalitat Valenciana for their financial support in project PROMETEO/2010/062 and the Caja de Ahorros del Mediterraneo for M.D. Esclapez's pre-doctoral grant.Esclapez Vicente, MD.; García Pérez, JV.; Mulet Pons, A.; Cárcel Carrión, JA.; Esclapez, MD. (2011). Ultrasound-assisted extraction of natural products. Food Engineering Reviews. 3(2):108-120. https://doi.org/10.1007/s12393-011-9036-6S10812032Abad Romero B, Bou-Maroun E, Reparet JM, Blanquet J, Cayot N (2010) Impact of lipid extraction on the dearomatisation of an Eisenia foetida protein powder. Food Chem 119:459–466Adewuyi YG (2001) Sonochemistry: environmental science and engineering applications. Ind Eng Chem Res 40:4681–4715Atchley AA, Crum LA (1988) Acoustic cavitation and bubble dynamics. In: Suslick KS (ed) Ultrasound, its chemical, physical, and biological effects. VHS Publishers, Weinheim, pp 1–64Arnold G, Leiteritz L, Zahn S, Rohm H (2009) Ultrasonic cutting of cheese: composition affects cutting work reduction and energy demand. Int Dairy J 19:314–320Barbero GF, Liazid A, Palma M, Barroso CG (2008) Ultrasound-assisted extraction of capsaicinoids from peppers. Talanta 75:1332–1337Benedito J, Carcel JA, Sanjuan N, Mulet A (2000) Use of ultrasound to assess Cheddar cheese characteristics. Ultrasonics 38:727–730Benedito J, Carcel JA, Rossello C, Mulet A (2001) Composition assessment of raw meat mixtures using ultrasonics. Meat Sci 57:365–370Bhaskaracharya RK, Kentish S, Ashokkumar M (2009) Selected applications of ultrasonics in food processing. Food Eng Rev 1:31–49Boonkird S, Phisalaphong C, Phisalaphong M (2008) Ultrasound-assisted extraction of capsaicinoids from Capsicum frutescens on a lab- and pilot-plant scale. Ultrason Sonochem 15:1075–1079Cárcel JA, Benedito J, Bon J, Mulet A (2007) High intensity ultrasound effects on meat brining. Meat Sci 76:611–619Cárcel JA, Benedito J, Rosselló C, Mulet A (2007) Influence of ultrasound intensity on mass transfer in apple immersed in a sucrose solution. J Food Eng 78:472–479Cavitus (2009) Grape colour and flavour extraction (Pat. Pend.) for red must extraction http://www.cavitus.com . Crafers. Accessed 10 Jan 2011Chea Chua S, Ping Tan C, Mirhosseini H, Ming Lai O, Long K, Sham Baharin B (2009) Optimization of ultrasound extraction condition of phospholipids from palm-pressed fiber. J Food Eng 92:403–409Chena R, Menga F, Zhang S, Liu Z (2009) Effects of ultrahigh pressure extraction conditions on yields and antioxidant activity of ginsenoside from ginseng. Sep Purif Technol 66:340–346Chivate MM, Pandit AB (1995) Quantification of cavitation intensity in fluid bulk. Ultrason Sonochem 2:19–25Da Porto C, Decorti D (2009) Ultrasound-assisted extraction coupled with under vacuum distillation of flavour compounds from spearmint (carvone-rich) plants: comparison with conventional hydrodistillation. Ultrason Sonochem 16:795–799Da Porto C, Decorti D, Kikic I (2009) Flavour compounds of Lavandula angustifolia L. to use in food manufacturing: Comparison of three different extraction methods. Food Chem 112:1072–1078Domínguez H, Núñez MJ, Lema JM (1994) Enzymatic pretreatment to enhance oil extraction from fruits and oilseeds: a review. Food Chem 49:271–286Dong J, Liu Y, Liang Z, Wanga W (2010) Investigation on ultrasound-assisted extraction of salvianolic acid B from Salvia miltiorrhiza root. Ultrason Sonochem 17:61–65Entezari MH, Kruus P (1994) Effect of frequency on sonochemical reactions. I: oxidation of iodide. Ultrason Sonochem 1:75–79Esclapez MD, Sáez V, Milán-Yáñez D, Tudela I, Louisnard O, González-García J (2010) Sonoelectrochemical treatment of water polluted with trichloroacetic acid: from sonovoltammetry to pre-pilot plant scale. Ultrason Sonochem 17:1010–1020Ferraro V, Cruz IB, Ferreira R, Malcata JFX, Pintado ME, Castro PML (2010) Valorisation of natural extracts from marine source focused on marine by-products: review. Food Res Int 43:2221–2233Fischer CH, Hart EJ, Henglein AJ (1986) Hydrogen/deuterium isotope exchange in the hydrogen deuteride-water system under the influence of ultrasound. Phys Chem 90:3059–3060Garcia-Noguera J, Weller CL, Oliveira FIP, Rodrigues S, Fernandes FAN (2010) Dual-stage sugar substitution in strawberries with a Stevia-based sweetener. Innovative Food Sci Emerg Technol 11:225–230García-Pérez JV, Cárcel JA, de la Fuente-Blanco S, Riera-Franco de Sarabia E (2006) Ultrasonic drying of foodstuff in a fluidized bed: parametric study. Ultrasonics 44:539–543García-Pérez JV, García-Alvarado MA, Carcel JA, Mulet A (2010) Extraction kinetics modeling of antioxidants from grape stalk (Vitis vinifera var. Bobal): Influence of drying conditions. J Food Eng 101:49–58González-García J, Sáez V, Tudela I, Díez-Garcia MI, Esclapez MD, Louisnard O (2010) Sonochemical treatment of water polluted by chlorinated organocompounds. A review. Water 2:28–74Handa SS, Preet S, Khanuja S, Longo G, Rakesh DD (2008) Extraction Technologies for Medicinal and Aromatic Plants. United Nations Industrial Development Organization and the International Centre for Science and High Technology, TriesteHemwimol S, Pavasant P, Shotipruk A (2006) Ultrasound-assisted extraction of anthraquinones from roots of Morinda citrifolia. Ultrason Sonochem 13:543–548Hielscher (2011) Teltow http:// www.hielscher.com . Accessed 10 Jan 2011Hu Y, Wang T, Wang M, Han S, Wan P, Fan M (2008) Extraction of isoflavonoids from Pueraria by combining ultrasound with microwave vacuum. Chem Engin Process 47:2256–2261Ince NH, Tezcanli G, Belen RK, Apikyan PG (2001) Ultrasound as a catalyzer of aqueous reaction systems: the state of the art and environmental applications. Appl Catal B 29:167–176Jadhav D, Rekha BN, Gogate PR, Rathod VK (2009) Extraction of vanillin from vanilla pods: a comparison study of conventional soxhlet and ultrasound assisted extraction. J Food Eng 93:421–426Ji J-b, Lu X-h, Cai M-q, Xu C-c (2006) Improvement of leaching process of Geniposide with ultrasound. Ultrason Sonochem 13:455–462Kanthale PM, Gogate PR, Pandit AB, Wilhelm AM (2003) Mapping of an ultrasonic horn: link primary and secondary effects of ultrasound. Ultrason Sonochem 10:331–335Karki B, Lamsal BP, Jung S, van Leeuwen JH, Pometto AL III, Grewell D, Khanal SK (2010) Enhancing protein and sugar release from defatted soy flakes using ultrasound technology. J Food Eng 96:270–278Kardos N, Luche J-L (2001) Sonochemistry of carbohydrate compounds. Carbohydr Res 332:115–131Kotronarou A, Mills G, Hoffmann MR (1991) Ultrasonic Irradiation of para-Nitrophenol in Aqueous Solution. J Phys Chem 95:3630–3638Kuijpers MWA, Kemmere MF, Keurentjes JTF (2002) Calorimetric study of the energy efficiency for ultrasound-induced radical formation. Ultrasonics 40:675–678Leighton TG (2007) What is ultrasound? Prog Biophys Mol Biol 93:3–83Leonelli C, Mason TJ (2010) Microwave and ultrasonic processing: now a realistic option for industry. Chem Eng Process 49:885–900Li H, Pordesimo L, Weiss J (2004) High intensity ultrasound-assisted extraction of oil from soybeans. 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J Food Eng 98:13–18Louisnard O, González-García J, Tudela I, Klima J, Sáez V, Vargas-Hernández Y (2009) FEM simulation of a sono-reactor accounting for vibrations of the boundaries. Ultrason Sonochem 16:250–259Luque de Castro MD, Priego-Capote F (2007) Analytical Applications of Ultrasound, Vol. 26, Techniques and Instrumentation in Analytical Chemistry. Elsevier Science, AmsterdamMa Y, Ye X, Hao Y, Xu G, Xu G, Liu D (2008) Ultrasound-assisted extraction of hesperidin from Penggan (Citrus reticulata) peel. Ultrason Sonochem 15:227–232Ma Y, Chen J-C, Liu Dong-Hong, Ye X-Q (2009) Simultaneous extraction of phenolic compounds of citrus peel extracts: effect of ultrasound. Ultrason Sonochem 16:57–62Makino K, Mossoba MM, Riesz P (1982) Chemical effects of ultrasound on aqueous solutions. Evidence for hydroxyl and hydrogen free radicals (.cntdot. OH and. cntdot. H) by spin trapping. 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Ultrason Sonochem 8:11–15Sáez V, Frias-Ferrer A, Iniesta J, Gonzalez-Garcıa J, Aldaz A, Riera E (2005) Chacterization of a 20 kHz sonoreactor. Part I: analysis of mechanical effects by classical and numerical methods. Ultrason Sonochem 12:59–65Sáez V, Frias-Ferrer A, Iniesta J, Gonzalez-Garcıa J, Aldaz A, Riera E (2005) Characterization of a 20 kHz sonoreactor. Part II: analysis of chemical effects by classical and electrochemical methods. Ultrason Sonochem 12:67–72Sahena F, Zaidul ISM, Jinap S, Karim AA, Abbas KA, Norulaini NAN, Omar AKM (2009) Application of supercritical CO2 in lipid extraction–A review. J Food Eng 95:240–253Science Direct Database (2011) www.sciencedirect.com (Data of consulting: February 2011)Soria AC, Villamiel M (2010) Effect of ultrasound on the technological properties and bioactivity of food: a review. Trends Food Sci Technol 21:323–331Starmans DAJ, Nijhuis HH (1996) Extraction of secondary metabolites from plant material: a review. 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Innovative Food Sci Emerg Technol 10:54–60Zhang Q-A, Zhang Z-Q, Yue X-F, Fan X-H, Li T, Chen S-F (2009) Response surface optimization of ultrasound-assisted oil extraction from autoclaved almond powder. Food Chem 116:513–518Zhao S, Kwok K-C, Liang H (2007) Investigation on ultrasound assisted extraction of saikosaponins from Radix Bupleuri. Sep Purif Technol 55:307–312Zhu KX, Sun X-H, Zhou H-M (2009) Optimization of ultrasound-assisted extraction of defatted wheat germ proteins by reverse micelles. J Cereal Sci 50:266–271Zheng L, Sun D-W (2006) Innovative applications of power ultrasound during food freezing processes—a review. Trends Food Sci Technol 17:16–23Zou Y, Xie C, Fan G, Gu Z, Han Y (2010) Optimization of ultrasound-assisted extraction of melanin from Auricularia auricula fruit bodies. Innovative Food Sci Emerg Technol 11:611–61
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