1,720,968 research outputs found
Preserving natural attributes of mango products by non-thermal technologies
Get PDFEls consumidors demanden nous productes a base de fruites -com els a punt per menjar-, segurs,
saludables i amb propietats similars als naturals. L’objecte d’estudi d’aquesta tesi doctoral fou
avaluar l’impacte de tractaments no tèrmics en propietats de qualitat de diversos productes de
mango: tallat, suc i puré.
Per una banda, l’efecte de diferents recobriments a base de polisacàrids, alginat (AL), quitosan
(CH), pectina (PE) i carboximetilcel·lulosa (CMC), es va avaluar en la conservació de la qualitat
del mango tallat. També, l’efecte dels polsos de llum (PL) combinats amb el recobriment AL i la
immersió en àcid màlic (MA) va permetre allargar la conservació dels atributs naturals durant 14
dies. D’altra banda, es va estudiar la influència dels polsos elèctrics d’alta intensitat de camp
HIPEF a 35 kV/cm, 4 μs- pols bipolar, 200 Hz i 50- 2000 μs en la reducció de població de
Listeria innòcua, l’activitat enzimàtica, les propietats sensorials així com el contingut de
bioactius. En aquest sentit el contingut de fenols en el suc tractat per HIPEF (1800 μs) va millorar
després de 59 dies. Finalment, es va estudiar l’impacte del tractament d’alta pressió hidrostàtica
(HHP) (400, 450, 500 MPa durant 0 a 16 min a 34 o 59°C) en les propietats fisicoquímiques i
enzimàtiques, com també en el contingut de compostos bioactius del puré de mango.
Aquesta investigació mostra la viabilitat de la conservació dels derivats de fruita mitjançant
tecnologies no tèrmiques.Consumers are currently demanding safe, healthy and novel fruit products, such as
ready-to-eat, with natural attributes. Therefore, the aim of the present doctoral thesis was to
assess the impact of non-thermal treatments on quality properties of various mango products:
fresh-cut, juice and puree. On one hand, the effect of different polysaccharide-based coatings,
alginate (AL), chitosan (CH), pectin (PE) and carboxymethylcellulose (CMC) was evaluated on
the quality preservation of fresh-cut mango. Also in fresh-cut mango, the effect of pulsed light
(PL) combined with AL coating and malic acid (MA) dipping extended preservation of natural
attributes throughout 14 days. On the other hand, the influence of high intensity pulsed electric
fields (HIPEF) at 35 kV/cm, 4 μs- bipolar pulses, 200 Hz and 50-2000 μs in mango juice was
studied in the reduction of Listeria innocua population, enzymatic activities, physicochemical and
sensorial attributes as well as the content of bioactive compounds. In this sense, phenolic content
in mango juice treated with HIPEF (1800 μs) was improved after 59 days. Finally, the impact of
high hydrostatic pressure (HHP) treatments (400, 450, 500 MPa for 0 to 16 min at 34 or 59°C) on
physicochemical, enzymatic properties and bioactive compounds of mango puree was observed.
This research reveals the feasibility of preserving fruit products by non-thermal technologies.Los consumidores piden nuevos productos a base de frutas, como los listos para
el consumo, seguros, saludables y con propiedades similares a los naturales. Por lo tanto, el
objeto de estudio de la presente tesis doctoral fue evaluar el impacto de tratamientos no térmicos
en la calidad de diversos productos de mango: cortado, zumo y puré. Por un lado, el efecto de
diferentes recubrimientos a base de polisacáridos, alginato (AL), quitosano (CH), pectina (PE) y
carboximetilcelulosa (CMC) se evaluó en la conservación de la calidad del mango cortado.
También, el efecto de los pulsos de luz (PL) combinado con el recubrimiento AL y la inmersión
en ácido málico (MA) permitió alargar la conservación de los atributos naturales durante 14 días.
Por otro lado, se estudió en el zumo de mango la influencia de los pulsos eléctricos de alta
intensidad de campo (HIPEF) a 35 kV/cm, 4 μs- pulso bipolar, 200 Hz y 50- 2000 μs en la
reducción de población de Listeria innocua, la actividad enzimática, las propiedades sensoriales
así como el contenido de bioactivos. En este sentido el contenido de fenoles en el zumo de mango
tratado por HIPEF (1800 μs) mejoró después de 59 días. Finalmente, el impacto del tratamiento
por alta presión hidrostática (HHP) (400, 450, 500 MPa de 0 a 16 min a 34 o 59°C) se observó en
las propiedades fisicoquímicas y enzimáticas y en el contenido de compuestos bioactivos en el
puré de mango. La presente investigación muestra la viabilidad de la conservación de derivados
de frutas mediante tecnologías no térmicas
Plan de intervención escolar para el abordaje de la obesidad y el sobrepeso en la etapa infantil
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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