2,000 research outputs found
The information sources of the first Spanish Newspapers (1618-1635): the construction of information credibility
Este trabajo analiza las fuentes de información utilizadas en un
corpus numeroso de avisos recogidos en periódicos españoles
impresos entre 1618 y 1635. El objetivo de partida es determinar
cómo se construye, en términos tanto históricos como retóricos, la
credibilidad informativa. Analizaremos la construcción retórica
de la credibilidad en el texto mismo de los avisos, concretamente
en las fuentes de información que estos declaran u ocultan; para
comprobar si existe una intención deliberada de encubrir las
fuentes de información, estudiaremos la frecuencia con que
aparece la atribución on deep background. La aproximación
metodológica que orienta este estudio es la que sostiene el
Historical News Discourse, que aplica las conclusiones y métodos
de análisis del Análisis Crítico del Discurso a los periódicos del
pasado, y contextualiza y explica sus resultados en relación a los
planteamientos de la Historia del Periodismo y de la
Comunicación (Conboy, Brownlees, Broersma y otros).
Defendemos en este trabajo que el análisis del discurso de los
primeros impresos informativos resulta fundamental para
conocer cómo se consolida en España la profesión periodística,
gracias a una nueva forma de auctoritas basada en la competencia
discursiva. El gacetero o periodista aparece como una nueva
modalidad de escritor, cuya credibilidad y reputación dependen
de su capacidad para acceder, organizar y declarar –de acuerdo a
patrones retóricos reconocibles para sus lectores– las fuentes de
información a las que tiene acceso.This paper analyses the information sources used in a large
corpus of news items published in Spanish printed newspapers
between 1618 and 1635. The initial aim is to determine how
information credibility was constructed in both historical and
rhetorical terms. To this end, the rhetorical construction of
credibility in the news stories are analysed by focusing on the
information sources that these reveal or conceal. And in order to
determine whether or not these sources were deliberately
concealed, the frequency with which ‘on deep background’
attribution appears is examined. The methodological approach on
which this study is based is Historical News Discourse, which
applies the conclusions and methods of critical discourse analysis
to newspapers of the past, in addition to contextualising and
explaining the results in terms of journalism history and
communication approaches (Conboy, Brownlees and Broersma,
among others). In this work, we contend that the discourse
analysis of the first printed newspapers is essential for gaining
further insights into how the journalistic profession consolidated
its position in Spain thanks to a new form of auctoritas based on
discourse competence. The gazetteer or journalist emerged as a
new kind of writer, whose credibility and reputation depended on
his ability to access, organise and reveal –according to rhetorical
patterns recognisable to readers– the information sources
available to him
Bioactive Potential of Aqueous Phenolic Extracts of Spices for Their Use in the Food Industry—A Systematic Review
The interest on the use of natural sources in the food industry has promoted the study of
plants’ phenolic compounds as potential additives. However, the literature has been focusing on
essential oils, with very few studies published regarding aqueous extracts, their phenolic composition,
and bioactivity. A systematic review was conducted on different databases following PRISMA
guidelines to evaluate the relevance of the phenolic content of different aromatic spices (oregano,
rosemary, thyme, ginger, clove, and pepper), as related to their bioactivity and potential application as
food additives. Although different extraction methods have been applied in the literature, the use of
green approaches using ethanol and deep eutectic solvents has increased, leading to the development
of products more apt for human consumption. The studied plants present an interesting phenolic
profile, ranging from phenolic acids to flavonoids, establishing a correlation between their phenolic
content and bioactivity. In this sense, results have proven to be very promising, presenting those
extracts as having similar if not higher bioactivity than synthetic additives already in use, with
associated health concerns. Nevertheless, the study of spices’ phenolic extracts is somehow limited
to in vitro studies. Therefore, research in food matrices is needed for more understanding of factors
interfering with their preservation activityNutrition and Food Sciences,
University of Granada (grant from the Regional Government of Andalucía PREDOC_00110
Endocardial-mesenchymal transition underlies fusion of the conotruncal ridges during embryonic cardiac outflow tract septation
The embryonic cardiac outflow tract (conotruncus) is a single tubular chamber that connects the right ventricle with the aortic arch arteries. It contains two opposite, long and helical mesenchymal cushions covered by endocardial cells (conotruncal ridges). Conotruncal division (septation) gives rise to the adult right and left outflows together with the aortic and pulmonary valves. It takes place by fusion of the two opposite ridges and formation of the conotruncal septum. Although the participation of neural crest cells in septation is well established, the mechanism of fusion of the conotruncal ridges remains unknown. Defects in fusion have been shown to produce bicuspid aortic valve, the most prevalent human congenital cardiac malformation, in a hamster model.
Three fusion mechanisms have been proposed to operate during embryonic development: epithelial adhesion, epithelial apoptosis and epithelial-mesenchymal transition (EMT). The first mechanism entails the expression of adhesion molecules and the maintenance of the identity of cells in contact, whereas in the other two, epithelial cells covering the fusing structures disappear by apoptosis or by transforming into mesenchymal cells. The objective of this study is to elucidate the mechanism involved in the fusion of the conotruncal ridges. Immunofluorecence techniques were used in ED 11-12 hamster embryos.
The results indicate that the mechanism of EMT, but not epithelial adhesion or apoptosis, is involved in the process of fusion of the conotruncal ridges. The EMT mechanism associated with conotruncal septation seems to be uncoupled from the process of formation of the endocardial cushions, which takes place at early stages. With these results, we can raise the hypothesis that defects in the EMT process may lead to different morphological types of bicuspid aortic valve.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. This study was supported by P10-CTS-6068 (Junta de Andalucía), CGL2014-52356-P and CGL2017-85090-P (Ministerio de Economía y Competitividad), contract UMAJI75 (Junta de Andalucía, European Social Fund), and Universidad de Málaga
IPv6 Network Mobility
Network Authentication, Authorization, and Accounting has
been used since before the days of the Internet as we know it
today. Authentication asks the question, “Who or what are
you?” Authorization asks, “What are you allowed to do?” And fi nally,
accounting wants to know, “What did you do?” These fundamental
security building blocks are being used in expanded ways today. The
fi rst part of this two-part series focused on the overall concepts of
AAA, the elements involved in AAA communications, and highlevel
approaches to achieving specifi c AAA goals. It was published in
IPJ Volume 10, No. 1[0]. This second part of the series discusses the
protocols involved, specifi c applications of AAA, and considerations
for the future of AAA
Entre el discurso historiográfico y la escritura íntima: otra Javiera Carrera que emerge, vive y siente
The liberal historiography of the XIX built an imaginary around Javiera Carrera, which was limited to a pasive role, something very typical of the woman of this period and that lets out others behaviors. From this premise, and focused on History of Mentalities, this study has the aim to reconstruct the symbolic repertoire about the body of Javiera, as a woman absorbed in a national independence context. Through her letters it is possible to elucidate how she was placed or presented in front of the period's facts, mainly from the perspective of the body and emotions, as a woman who lives and feels. La historiografía liberal del siglo XIX construyó un imaginario en torno a Javiera Carrera, limitado a un rol pasivo, propio de la mujer del periodo, dejando de lado otro tipo de accionar. A partir de esta primicia, y desde un enfoque de historia de las mentalidades, este estudio tiene por objetivo la reconstrucción del repertorio simbólico operante sobre el cuerpo de Javiera, como mujer inmersa en el contexto independista a través de sus cartas, para dilucidar cómo se posiciona o autorepresenta frente a los hechos del periodo, principalmente desde una perspectiva del cuerpo y las emociones, en cuanto mujer que vive y siente.
Scalable QoS-aware Mobility for Future Mobile Operators
Telecom operators and Internet service providers
are heading for a new shift in communications
paradigms. The forthcoming convergence
of cellular and wireless data networks is often
manifested in an “all IP approach” in which all
communications are based on an end-to-end IP
protocol framework. The approach to network
design becomes user and service-centered, so
that continuous reachability of mobile users and
sustained communication capabilities are default
requirements for a prospective architecture. In
this article, we describe a network architecture
which is able to provide seamless communication
mobility, triggered either by the user or by the
network, across multiple technologies. The architecture
allows for media independent handovers
and supports optimized mobility and resource
management functions. The main focus of the
article is on major technical highlights of mobility
and quality-of-service (QoS) management subsystems
for converged networks.Publicad
La construcción del estado-nación en Eritrea
Depto. de Ciencia Política y de la AdministraciónFac. de Ciencias Políticas y SociologíaFALSEunpu
Prevalence of caries and gingivitis in 2- to 4-year-old children attending daycare centers managed by the Chilean National Kindergartens Board (JUNJI) and municipal schools, Valdivia.
Abstract: Objective: To determine the prevalence of carious lesions and gingivitis in 2- to 4-year-old children attending JUNJI daycare centers and urban municipal schools in the city of Valdivia, Chile. Material and method: Descriptive cross-sectional study. A population of 182 two-year-old children and 285 four-year-old children were examined. Subjects were selected by stratified random sampling. All subjects were enrolled in daycare centers managed by JUNJI and municipal schools in the city of Valdivia. An oral examination was performed to measure the DMFT and hemorrhagic indexes according to the WHO diagnostic criteria. The presence of cavitated carious lesions and gingivitis was determined, resulting in descriptive statistics according to age and gender. Results: The prevalence of caries was 12.6% in two-year-old children and 41% in four-year-olds, respectively. The prevalence of gingivitis was 36.8% at 2 years of age and 70.5% at 4 years. There were no significant differences by gender at 2 years of age (p=1) or at 4 years (p=0.37). Two year-old children have significantly fewer carious lesions and gingivitis less frequently than four-year-olds (p=<.001). Conclusion: Two year-old children have a lower prevalence of carious lesions and gingivitis than four-year-old ones. No relationship between the variables and gender was found
Chamber specific expression of Myosin heavy chain 7b in the heart of vertebrates
In extant vertebrates, myosin heavy chain (MyHC) 6 and 7 are the main isoforms of atrial and ventricular myocardium respectively, whereas MyHC7b has been proposed to be an ancient cardiac isoform only expressed during embryonic development in modern species.
In preliminary immunohistochemical studies of the heart of the lesser spotted dogfish (Scyliorhinus canicula; Chondrichthyes), we have observed that while MF20 labels homogeneously all the myocardium, A4.1025 labels the inflow cardiac segments (sinus venosus and atrium) but not the outflow segments (ventricle and conus arteriosus). In order to interpret these results, we have performed western and slot blots from samples of dogfish and hamster (Mesocricetus auratus) hearts, HPLC-ESI-MS/MS from dogfish samples, and immunohistochemistry in hearts of representative species of vertebrates, namely elasmobranchs, polypteriforms, acipenseriforms, teleosts and mammals, using MF20 and A4.1025 antibodies.
Western and slot blot results confirmed the specificity of MF20 and A4.1025 for MyHC in dogfish, as well as their differential reactivity against different myocardial segments. HPLC-ESI-MS/MS using protein databases from Callorhinchus milii (Chondrichthyes) and Chordata revealed the presence of MyHC6 and 7 in all the dogfish myocardial segments, and of MyHC7b only in the outflow segments. Immunohistochemistry showed that while MF20 signals were homogeneous in all the myocardial segments of all the species studied, A4.1025 signals were restricted to the inflow myocardial segments in elasmobranchs, homogeneous in teleosts and acipenseriforms, and low in the ventricle of polypteriforms.
It can be inferred that the A4.1025 antibody, as opposed to MF20, has a low affinity for MyHC7b, at least in the dogfish. In addition, we show that MyHC distribution in the cardiac chambers has changed during the evolution of gnathostomes.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.Study supported by grants CGL2017-85090-P and CGL2014-52356-P (Ministerio de Economía y Competitividad), FPU15/03209 (Ministerio de Educación, Cultura y Deporte), contract UMAJI75 (Junta de Andalucía, European Social Found), FEDER and Universidad de Málaga
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