2,051 research outputs found
La Cultura del Renaixement : homenatge al pare Miquel Batllori /
Les pàgines que aquí presentem són el reflexe del tercer cicle de conferències organitzat per la revista Manuscrits, revista d'Història Moderna de la U.A.B. El primer cicle de conferències va estar dedicat a la "Transició del Feudalisme al Capitalisme" i es va publicar en el númèro 4-5 (1987); el segon tingué per tema les "Revoltes i revolucions de l'Europa Moderna" i es va publicar en el número 9 (1991). Aquest darrer cicle ha estat dedicat a "La cultura del Renaixement a Espanya", amb motiu del centenari més silenciós dels que es celebraren a Espanya al 1992: el del naixement de l'humanista valencià Lluís Vives
Mapeo reticular del Discurso de la Sociología y el desarrollo rural en América Latina. Caso de estudio : Asociación Latinoamericana de Sociología Rural (ALASRU)
Los procesos de descomposición sistémica que se viven en Latinoamérica están siendo abordados por una miríada de investigadores, provenientes de las distintas geografías de la región y operadores de una compleja diversidad de marcos epistemológicos que permiten observar preocupaciones en común: procesos de vulnerabilidad social, económica, política, cultura, ambiental, etc. En este sentido, el objetivo de este trabajo fue realizar un mapa conceptual, a partir de los trabajos presentados en el 9° congreso de ALASRU (México D.F., 2014), por medio del análisis de redes sociales, a fin de sintetizar la construcción reticular, en Latinoamérica, del discurso epistemológico de la sociología y el desarrollo rural y poderlo agrupar por región y país. Esto se realizó al analizar dos tipos de coocurrencias: la de palabras en un determinado texto y la de matrices de actores por palabras. Esto permitió descomponer (en términos semánticos), cada uno de los abstracts presentados en dicho congreso, en sus diversos conceptos y conectores gramaticales, lo que arrojó una retícula causal del discurso de cada trabajo.Latin America systematic breakdown processes are being approached by a myriad of researchers coming from different places of the region, users of a complex diversity of epistemological frameworks. This allows the observation of common interests: social, economic, political, cultural and environmental vulnerability processes. This work purpose is to develop a conceptual map, from the papers presented in the 9th ALASRU Congress (Mexico City, 2014), through social network analysis, in order to synthetize the reticular construction in Latin America of development and sociology discourse and group it at a "glocal" level, per region, institution and researcher. This was done by analyzing two types of co-occurrences: words from a given text and actor per words. This allowed to restructure (in semantic terms) every and each abstract presented in the Congress, regarding their concepts and grammatical connectors, which generated a casual grid for each paper discourse
Triggering, guiding and deviation of long air spark discharges with femtosecond laser filament
International audienceIn the perspective of the laser lightning rod, the ability of femtosecond filaments to trigger and to guide large scale discharges has been studied for several years. The present paper reports recent experimental results showing for the first time that filaments are able not only to trigger and guide but also to divert an electric discharge from its normal path. Laser filaments are also able to divert the spark without contact between laser and electrodes at large distance from the laser. A comparison between negative and positive discharge polarities also reveals important discrepancies in the guiding mechanism
Co-inoculation with Yeast and LAB Under Winery Conditions: Modification of the Aromatic Profile of Merlot Wines
The present work reports the impact of yeast/LAB co-inoculation on the aromatic profile of Merlot winesmade in wineries. This study was carried out over two consecutive years on five Merlot wines in Bordeauxand Swiss wineries, using Saccharomyces cerevisiae and Oenococcus oeni starter cultures. Seventy aromaticcompounds were quantified and, in addition, the sensory profiles of two wines were determined in orderto compare the aromatic notes of the sequential and co-inoculated wines. The influence of the timing ofinoculation with lactic acid bacteria (LAB) on the metabolic profile of wines was observed. It confirmedprevious work carried out on a micro-scale but, for the first time, the impact of yeast/LAB co-inoculationwas significantly demonstrated from a sensory point of view under winery conditions. In particular, thefruity and lactic notes, as well as the markers associated with these descriptors, such as esters and diacetyl,were altered. Co-inoculation does not always favour fruity expression, nor does it reduce the diacetylcontent and lactic aroma intensity. All of the trends were observed either in the production and degradationof metabolites, or by the development of an aromatic mask over the short and long term
D* Production in Deep Inelastic Scattering at HERA
This paper presents measurements of D^{*\pm} production in deep inelastic
scattering from collisions between 27.5 GeV positrons and 820 GeV protons. The
data have been taken with the ZEUS detector at HERA. The decay channel
(+ c.c.) has been used in the study. The
cross section for inclusive D^{*\pm} production with
and is 5.3 \pms 1.0 \pms 0.8 nb in the kinematic region
{ GeV and }. Differential cross
sections as functions of p_T(D^{*\pm}), and are
compared with next-to-leading order QCD calculations based on the photon-gluon
fusion production mechanism. After an extrapolation of the cross section to the
full kinematic region in p_T(D^{*\pm}) and (D^{*\pm}), the charm
contribution to the proton structure function is
determined for Bjorken between 2 10 and 5 10.Comment: 17 pages including 4 figure
Underneath the Harlem Moon / music by Harry Revel; words by Mack Gordon
https://egrove.olemiss.edu/sharris_e/1024/thumbnail.jp
Development of an Automated Method for Selected Aromas of Red Wines from Cold-Hardy Grapes Using Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry-Olfactometry
The aroma profile of red wine is complex and research focusing on aroma compounds and their links to viticultural and enological practices is needed. Current research is limited to wines made from cold-hardy cultivars (interspecific hybrids of vinifera and native N. American grapes). The objective of this research was to develop a fully automated solid phase microextraction (SPME) method, using tandem gas chromatography-mass spectrometry (GC-MS)-olfactometry for the simultaneous chemical and sensory analysis of volatile/semi-volatile compounds and aroma in cold-hardy red wines. Specifically, the effects of SPME coating selection, extraction time, extraction temperature, incubation time, sample volume, desorption time, and salt addition were studied. The developed method was used to determine the aroma profiles of seven selected red wines originating from four different cold-hardy grape cultivars. Thirty-six aroma compounds were identified from Maréchal Foch, St. Croix, Frontenac, Vincent, and a Maréchal Foch/Frontenac blend. Among these 36 aroma compounds, isoamyl alcohol, ethyl caproate, benzeneethanol, ethyl decanoate, and ethyl caproate are the top five most abundant aroma compounds. Olfactometry helps to identify compounds not identified by MS. The presented method can be useful for grape growers and wine makers for the screening of aroma compounds in a wide variety of wines and can be used to balance desired wine aroma characteristics
Interactions of Cathinone NPS with Human Transporters and Receptors in Transfected Cells
Pharmacological assays carried out in transfected cells have been very useful for describing the mechanism of action of cathinone new psychoactive substances (NPS). These in vitro characterizations provide fast and reliable information on psychoactive substances soon after they emerge for recreational use. Well-investigated comparator compounds, such as methamphetamine, 3,4-methylenedioxymethamphetamine, cocaine, and lysergic acid diethylamide, should always be included in the characterization to enhance the translation of the in vitro data into clinically useful information. We classified cathinone NPS according to their pharmacology at monoamine transporters and receptors. Cathinone NPS are monoamine uptake inhibitors and most induce transporter-mediated monoamine efflux with weak to no activity at pre- or postsynaptic receptors. Cathinones with a nitrogen-containing pyrrolidine ring emerged as NPS that are extremely potent transporter inhibitors but not monoamine releasers. Cathinones exhibit clinically relevant differences in relative potencies at serotonin vs. dopamine transporters. Additionally, cathinone NPS have more dopaminergic vs. serotonergic properties compared with their non-β-keto amphetamine analogs, suggesting more stimulant and reinforcing properties. In conclusion, in vitro pharmacological assays in heterologous expression systems help to predict the psychoactive and toxicological effects of NPS
Granulocytic Sarcoma in a Nonleukemic Patient: Place of Radiotherapy and Systemic Therapies
Granulocytic sarcoma is a rare extramedullary tumour, which most often occurs in the course of an acute or chronic leukaemia or myeloproliferative disorders. Rarely it is found before peripheral blood or bone marrow evidence of leukemia is present. We report an unusual case of acute paraplegia at first presentation of a spinal epidural granulocytic sarcoma without any haematological disorder. Therapeutic strategies are discussed in the light of the literature
miR-145 suppresses embryo–epithelial juxtacrine communication at implantation by modulating maternal IGF1R
Successful implantation requires the synchronization of viable embryonic development with endometrial receptivity. The mechanisms allowing for the initiation of crosstalk between the embryo and the endometrium remain elusive; however, recent studies have revealed that there are alterations in endometrial microRNAs (miRs) in women suffering repeated implantation failure and that one of the altered miRs is miR-145. We assessed the role of miR-145 and its target IGF1R, in early implantation. miR-145 overexpression and IGF1R knockdown were achieved in Ishikawa endometrial cells. Quantitative PCR, western blotting and 3′UTR luciferase reporter assays confirmed that IGF1R is a direct target of miR-145 in the endometrium. Attachment of mouse embryos or IGF1-coated beads to endometrial epithelial cells was used to study the effects of altered miR-145 and/or IGF1R expression on early implantation events. miR-145 overexpression or specific reduction of IGF1R impaired attachment in both cases. An IGF1R target protector prevented the miR-145-mediated reduction in IGF1R and reversed the effect of miR-145 overexpression on attachment. The data demonstrate that miR-145 influences embryo attachment by reducing the level of IGF1R in endometrium
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