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Search Results: 1 - 10 of 219619 matches for " Stephany; Dondero C "
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PASTA UNTABLE DE PAVO ENRIQUECIDA CON FIBRAS, VITAMINAS Y MINERALES ANTIOXIDANTES COMO INGREDIENTES FUNCIONALES PARA EL ADULTO MAYOR
Garrido B,Fernando; González Z,Stephany; Dondero C,Marta; Wittig de Penna R,Emma;
Revista chilena de nutrición , 2010, DOI: 10.4067/S0717-75182010000300011
Abstract: a spread for the elderly with turkey, fibers (insulin and oligofructose), anti-oxidant vitamins (a and e) and minerals (selenium and zinc) has been developed. the methodology of taguchi was used for the optimization of the formulation, considering control factors such as pig butter, hydrated insulin, lactonal, salt, oregano/pepper, garlic and ice. experimental designs l8 (27) and l9 (34) were used, and sensorial assessments were made. the optimized formulation obtained a value of4.51 (greater than "good"). the low fat and calorie levels as well as the smooth and pleasant texture stand out in the product. furthermore, it has been shown that the product is apt and safe for consumption. the spread maintained an optimal sensorial and sanitary quality during storage for 28 days under refrigeration. elderly showed a 90% of acceptance and a high preference by the spread. therefore, the methodology of taguchi optimized the spread, making it a good alternative of food for the elderly.
PASTA UNTABLE DE PAVO ENRIQUECIDA CON FIBRAS, VITAMINAS Y MINERALES ANTIOXIDANTES COMO INGREDIENTES FUNCIONALES PARA EL ADULTO MAYOR TURKEY SPREAD WITH FIBER, ANTI-OXIDANT VITAMINS AND MINERALS AS FUNCTIONAL INGREDIENTS FOR ELDERLY PEOPLE
Fernando Garrido B,Stephany González Z,Marta Dondero C,Emma Wittig de Penna R
Revista Chilena de Nutricíon , 2010,
Abstract: Se desarrolló una pasta untable destinada al adulto mayor con pavo, fibras solubles (inulina y oligofructosa), vitaminas (A y E) y minerales antioxidantes (selenio y zinc). La formulación se optimizó con la metodología de Taguchi, considerando como factores de control: manteca de cerdo, inulina hidratada, emulsionante, sal, orégano/pimienta, ajo y hielo. Se utilizaron los dise os experimentales L8(27) y L9(34) y se realizaron evaluaciones sensoriales, obteniendo la formulación optimizada un puntaje de 4,51 (superior a "bueno"). Del producto destacó el bajo nivel de lípidos y calorías, la textura suave-agradable y se demostró que el producto es apto y seguro para el consumo, manteniendo su calidad sensorial y sanitaria durante 28 días de almacenamiento en refrigeración. El adulto mayor mostró un 90% de aceptación y alta preferencia por la pasta. Por lo tanto, la metodología de Taguchi logró optimizar la pasta untable, constituyendo una buena alternativa de alimento para el adulto mayor. A spread for the elderly with turkey, fibers (insulin and oligofructose), anti-oxidant vitamins (A and E) and minerals (selenium and zinc) has been developed. The methodology of Taguchi was used for the optimization of the formulation, considering control factors such as pig butter, hydrated insulin, lactonal, salt, oregano/pepper, garlic and ice. Experimental designs L8 (27) and L9 (34) were used, and sensorial assessments were made. The optimized formulation obtained a value of4.51 (greater than "good"). The low fat and calorie levels as well as the smooth and pleasant texture stand out in the product. Furthermore, it has been shown that the product is apt and safe for consumption. The spread maintained an optimal sensorial and sanitary quality during storage for 28 days under refrigeration. Elderly showed a 90% of acceptance and a high preference by the spread. Therefore, the methodology of Taguchi optimized the spread, making it a good alternative of food for the elderly.
ACEPTABILIDAD DE SOPAS DESHIDRATADAS DE LEGUMINOSAS ADICIONADAS DE REALZADORES DEL SABOR (UMAMI)
Garrido B,Fernando; Jara M,Karina; Wittig de Penna R,Emma; Dondero C,Marta; Mendoza G,Silvia; González Z,Stephany;
Revista chilena de nutrición , 2009, DOI: 10.4067/S0717-75182009000400007
Abstract: the enhancer effect of glutamate monosodium (msg) flavor was evaluated and its synergistic action with 5'-ribonucleotides: ionone rib nucleotides 5'-monophosphate (imp) and guano sine monophosphate (gmp) in dehydrated soups consisting of lentils and peas. four formulations were developed for both soups: the first was the target with the original level of msg, the following had different concentrations and mixtures of these enhancers (6% msg; 6% msg and 0.26% imp; 0.6 msg and 0.12% imp-gmp). a five-.point graphic hedonic scale test was used, where 1 represented ìthe most upset face? and 5 represented ìthe happiest face?. the most accepted soup was selected by thirty elderly adults. the lentils soup with 0,6 msg and 0j2% imp-gmp and the pea's soup with 6% msg and 0.26%imp obtained the greatest level of acceptance. so, the effectiveness of the synergistic action between the msg and 5'-ribonucleotides was demonstrated, because they can improve the acceptance of the evaluated formulation.
ACEPTABILIDAD DE SOPAS DESHIDRATADAS DE LEGUMINOSAS ADICIONADAS DE REALZADORES DEL SABOR (UMAMI) ACCEPTABILITY OF DEHYDRATED LEGUME SOUPS WITH THE ADDITION OF FLAVOR ENHANCERS (UMAMI)
Fernando Garrido B,Karina Jara M,Emma Wittig de Penna R,Marta Dondero C
Revista Chilena de Nutricíon , 2009,
Abstract: Se evaluó el efecto realzador del sabor del glutamato monosódico (GMS) y su acción sinergista con 5'-ribonucleótidos: inosinato monofosfato (IMP) y guanilato monofosfato (GMP), cuando se adicionaron a sopas deshidratadas de lentejas y arvejas. Se elaboraron 4 formulaciones para cada sopa, la primera formulación correspondió al control con su nivel de GMS original, las siguientes formulaciones contaron con distintas concentraciones y mezclas de estos realzadores (6% GMS; 6% GMS mas 0,26%IMPy 0,6 GMS mas 0,12% IMP-GMP). Se utilizó la evaluación sensorial de Escala Hedónica Gráfica, con una escala de 1 al 5, donde 1: representa "la carita más disgustada" y 5: "la más feliz". Treinta adultos mayores determinaron la formulación más aceptada. La sopa de lentejas con 6% de GMS mas 0,12% de IMP-GMP fue la que tuvo mayor aceptación, mientras que para la sopa de arvejas fue aquella que contenía 6% de GMS más 0,26% de IMP. Por tanto, se pudo demostrar la efectividad de la acción sinergista entre el GMS y los 5'-ribonucleótidos, al mejorar las aceptación de las formulaciones evaluadas. The enhancer effect of glutamate monosodium (MSG) flavor was evaluated and its synergistic action with 5'-ribonucleotides: ionone rib nucleotides 5'-monophosphate (IMP) and guano sine monophosphate (GMP) in dehydrated soups consisting of lentils and peas. Four formulations were developed for both soups: the first was the target with the original level of MSG, the following had different concentrations and mixtures of these enhancers (6% MSG; 6% MSG and 0.26% IMP; 0.6 MSG and 0.12% IMP-GMP). A five-.point Graphic Hedonic Scale test was used, where 1 represented ìthe most upset face and 5 represented ìthe happiest face . The most accepted soup was selected by thirty elderly adults. The lentils soup with 0,6 MSG and 0J2% IMP-GMP and the pea's soup with 6% MSG and 0.26%IMP obtained the greatest level of acceptance. So, the effectiveness of the synergistic action between the MSG and 5'-ribonucleotides was demonstrated, because they can improve the acceptance of the evaluated formulation.
Topological Field Theories and Duality
J. Stephany
Physics , 1996, DOI: 10.1016/S0370-2693(96)01407-4
Abstract: Topologically non trivial effects appearing in the discussion of duality transformations in higher genus manifolds are discussed in a simple example, and their relation with the properties of Topological Field Theories is established.
Maternal age at first birth and adolescent education in Brazil
Leticia Marteleto,Molly Dondero
Demographic Research , 2013,
Abstract: BACKGROUND Brazil has witnessed dramatic changes in its fertility patterns in recent decades. The decline to below-replacement fertility has been accompanied by increases in the proportion of children born to young mothers. Yet we know little about the well-being of children born to young mothers in Brazil. OBJECTIVE Using data from the 2006 Pesquisa Nacional de Demografia e Saúde and a quasi-natural experimental approach, this study examines the implications of maternal age at first birth for the education of Brazilian adolescents. RESULTS We find that being born to a young mother is associated with educational disadvantages in adolescence, but that these disadvantages are attenuated once we account for mothers' selection into early childbearing. We also find that, in southern Brazil, adolescents born to young mothers have poorer educational outcomes compared with their peers born to older mothers, but that in northern Brazil no such disparities exist. CONCLUSIONS Adolescent educational disadvantages associated with being born to a young mother are not an artifact of selectivity, at least in southern Brazil. Regional variation in the effect of maternal age at first birth on adolescent education suggests the important role of the extended family and the father's presence as mechanisms through which disadvantages operate.
An Innovative Approach for Attribute Reduction in Rough Set Theory  [PDF]
Alex Sandro Aguiar Pessoa, Stephan Stephany
Intelligent Information Management (IIM) , 2014, DOI: 10.4236/iim.2014.65022
Abstract:

The Rough Sets Theory is used in data mining with emphasis on the treatment of uncertain or vague information. In the case of classification, this theory implicitly calculates reducts of the full set of attributes, eliminating those that are redundant or meaningless. Such reducts may even serve as input to other classifiers other than Rough Sets. The typical high dimensionality of current databases precludes the use of greedy methods to find optimal or suboptimal reducts in the search space and requires the use of stochastic methods. In this context, the calculation of reducts is typically performed by a genetic algorithm, but other metaheuristics have been proposed with better performance. This work proposes the innovative use of two known metaheuristics for this calculation, the Variable Neighborhood Search, the Variable Neighborhood Descent, besides a third heuristic called Decrescent Cardinality Search. The last one is a new heuristic specifically proposed for reduct calculation. Considering some databases commonly found in the literature of the area, the reducts that have been obtained present lower cardinality, i.e., a lower number of attributes.

Measuring the Quality of Observational Study Data in an International HIV Research Network
Stephany N. Duda, Bryan E. Shepherd, Cynthia S. Gadd, Daniel R. Masys, Catherine C. McGowan
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0033908
Abstract: Observational studies of health conditions and outcomes often combine clinical care data from many sites without explicitly assessing the accuracy and completeness of these data. In order to improve the quality of data in an international multi-site observational cohort of HIV-infected patients, the authors conducted on-site, Good Clinical Practice-based audits of the clinical care datasets submitted by participating HIV clinics. Discrepancies between data submitted for research and data in the clinical records were categorized using the audit codes published by the European Organization for the Research and Treatment of Cancer. Five of seven sites had error rates >10% in key study variables, notably laboratory data, weight measurements, and antiretroviral medications. All sites had significant discrepancies in medication start and stop dates. Clinical care data, particularly antiretroviral regimens and associated dates, are prone to substantial error. Verifying data against source documents through audits will improve the quality of databases and research and can be a technique for retraining staff responsible for clinical data collection. The authors recommend that all participants in observational cohorts use data audits to assess and improve the quality of data and to guide future data collection and abstraction efforts at the point of care.
Rapid eye movements during sleep in mice: High trait-like stability qualifies rapid eye movement density for characterization of phenotypic variation in sleep patterns of rodents
Stephany Fulda, Christoph PN Romanowski, Andreas Becker, Thomas C Wetter, Mayumi Kimura, Thomas Fenzl
BMC Neuroscience , 2011, DOI: 10.1186/1471-2202-12-110
Abstract: We obtained standardized electroencephalographic (EEG), electromyographic (EMG) and electrooculographic (EOG) signals from freely behaving mice. EOG electrodes were bilaterally and chronically implanted with placement of the electrodes directly between the musculus rectus superior and musculus rectus lateralis. After recovery, EEG, EMG and EOG signals were obtained for four days. Subsequent to the implantation process, we developed and validated an Eye Movement scoring in Mice Algorithm (EMMA) to detect REM as singularities of the EOG signal, based on wavelet methodology.The distribution of wakefulness, non-REM (NREM) sleep and rapid eye movement (REM) sleep was typical of nocturnal rodents with small amounts of wakefulness and large amounts of NREM sleep during the light period and reversed proportions during the dark period. REM sleep was distributed correspondingly. REM density was significantly higher during REM sleep than NREM sleep. REM bursts were detected more often at the end of the dark period than the beginning of the light period. During REM sleep REM density showed an ultradian course, and during NREM sleep REM density peaked at the beginning of the dark period. Concerning individual eye movements, REM duration was longer and amplitude was lower during REM sleep than NREM sleep. The majority of single REM and REM bursts were associated with micro-arousals during NREM sleep, but not during REM sleep.Sleep-stage specific distributions of REM in mice correspond to human REM density during sleep. REM density, now also assessable in animal models through our approach, is increased in humans after acute stress, during PTSD and in depression. This relationship can now be exploited to match animal models more closely to clinical situations, especially in animal models of depression.Already in 1875 electrical activity from the brains of rabbits and monkeys was described [1] and by the early 1930s, all major findings in electroencephalograms (EEG) alterations dur
Intermittent chaos driven by nonlinear Alfvén waves
E. L. Rempel, A. C.-L. Chian, A. J. Preto,S. Stephany
Nonlinear Processes in Geophysics (NPG) , 2004,
Abstract: We investigate the relevance of chaotic saddles and unstable periodic orbits at the onset of intermittent chaos in the phase dynamics of nonlinear Alfvén waves by using the Kuramoto-Sivashinsky (KS) equation as a model for phase dynamics. We focus on the role of nonattracting chaotic solutions of the KS equation, known as chaotic saddles, in the transition from weak chaos to strong chaos via an interior crisis and show how two of these unstable chaotic saddles can interact to produce the plasma intermittency observed in the strongly chaotic regimes. The dynamical systems approach discussed in this work can lead to a better understanding of the mechanisms responsible for the phenomena of intermittency in space plasmas.
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