5,870 research outputs found
Fresh fruit and vegetables: a world of multiple interactions : the case of the Buenos Aires Central Wholesale Market (BACWM)
No full textThis research explores ethnographically the everyday social interactions between the ‘users’ of a particular marketplace, the Buenos Aires Central Wholesale Market (BACWM). The ‘users’ of this marketplace are the social actors who work there everyday, and who bring and buy fresh produce. These ´users´ are the ´makers´ of the BACWM since, through their everyday practices, interactions and interpretations and knowledge, they socially construct this hub of distribution
A Laboratory for Mathematics
No full textMacchine matematiche; dalla storia alla scuola is a book by Maria Grazia Bartolini Bussi and Michela Maschietto that provides a description of the reconstruction of many
historical machines for drawing, and their impact on the history of mathematics. Underlying the book’s thesis are ideas about
education and developments in neuroscience. Laura Tedeschini Lalli discussed the book and the educational experiments and
their goals with author Maria Grazia Bartolini Bussi
Maria Cristina Arellana, Georgina Estevez, and Laura Tobie
No full textThis 1965 photograph shows Maria Cristina Arellana of Havana, Cuba, Georgina Estevez and Laura Tobie, both of Caracas, Venezuela in Hubert Hayes Memorial Log Cabin. Founder and director of the Mountain Youth Jamboree, Hubert H. Hayes (1901-1964) auditioned and directed youth to perform in folk dance, music, and folk and ballad singing. The jamboree was held in the Asheville City Auditorium (now known as Thomas Wolfe Auditorium) from 1948 to 1973, and Hayes’ wife, Leona Trantham Hayes (1913-1989) continued to direct the program after his death in 1964. Hubert Hayes was an author, playwright, and alumni of Duke University
The first quinoa (Chenopodium quinoa Willd) macrobotanical remains at Sierras del Norte (Central Argentina) and their implications in pre-Hispanic subsistence practices
No full textThis paper presents a study of the first quinoa macrobotanical remains from the late pre-Hispanic site Quebrada Norte 7 (ca. 700 to 300 BP, Sierras of Norte, Córdoba, Argentina). The genus Chenopodium have been recorded since c. 7000 BP in several archaeological sites in Andean South America, from the Middle Holocene to the era of the Inca empire, suggesting that this plant has been used in multiple ways and has had economic and social importance continuing into the present time. Quinoa has been considered one of the primary subsistence resources available to societies in the sierras of Córdoba during the late Pre-Hispanic Period (800–1500 CE), but this inference was drawn from indirect data, such as Spanish documents and archaeological starch, grains, and pollen. The identification of Chenopodium quinoa was made via macrobotanical remains (achenes), examining quantitative and qualitative features. The presence of both quinoa and ajara, or quinoa negra, remains suggests that the Andean crop/weed complex was part of subsistence system in Central ArgentinaFil: Lopez, María Laura. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Arqueología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Recalde, Maria Andrea. Centro de Estudios Históricos "Profesor Carlos S. A. Segreti"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Electrodialysis as a potential technology for 4-nitrophenol abatement from wastewater
No full text4-Nitrophenol is a widely used emerging pollutant in various industries, including the production of agrochemicals, drugs, and synthetic dyes. Due to its potential environmental harmful effects, there is a need to study its reuse and removal from wastewater. This study used electrodialysis technology to separate 4-nitrophenol ions using a four-compartment stack. The effects of supporting electrolyte concentration, pH, voltages, and current density on the performance of electrodialysis for separating 4-nitrophenol were investigated. A high extraction percentage of 77% was achieved with low energy consumption (107 kWh kg−1) when high 4-nitrophenol flows and transport numbers were reached.Fil: Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Cornaglia, Laura Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Gutierrez, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Bosko, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentin
Coraggio ed età evolutiva
No full textNell'ultimo decennio, grazie al contributo della psicologia positiva, si è cominciato a
porre maggiore attenzione agli aspetti positivi della crescita e deUo sviluppo e alla loro relazione
con i diversi contesti di vita, spostando il focus, nel corso dello sviluppo del bambino,
dai deficit e dai problemi alla valorizzazione di una serie di risorse e capacità che sembrano
agire come fattori di protezione dei problemi di adattamento e benessere psico-sociale,
come il coraggio, l'ottimismo, la speranza, la perseveranza e le capacità interpersonali (Catalano,
Berglund, Ryan, Lonczak, & Hawkin, 2004; Roberts, Brown, Johnson, &. Reinke,
2002). A riguardo, è ampiamente sottolineato che tali capacità e risorse dovrebbero essere
promosse e sviluppate il prima possibile, già dalla prima infanzia, al fine di poter formare
adulti che siano in grado di far fronte ad una società complessa come quella attuale, caratterizzata
dalla presenza di crisi sociali, economiche ed ambientali più massicce e preoccupanti
di quelle proprie del secolo passato (Nota & Soresi, 2015a).
Tra tali costrutti, il coraggio, sebbene sia considerato come una delle principali virtù
umane e i primi contributi risalgono al '400 a.c., (Dahlsgaard, Peterson, & Seligman, 2005),
ha finora ricevuto una sporadica attenzione nella letteratura psicologica (Lopez, O'Byrne,
& Peterson, 2003), e l'elaborazione di una definizione operazionale del costrutto è ancora
oggetto di studio (Rate, Clarke, Lindsay, & Sternberg, 2007). Sebbene non vi sia accordo su
una definizione di coraggio, Rate et al. (2007) hanno individuato alcuni elementi comuni in
molte delle definizioni presenti neUa letteratura internazionale: intenzionalità; presenza di
un rischio aggettivo per chi esegue l'atto coraggioso; motivazione a perseguire uno scopo
nobile; e presenza di un'emozione personale di paura (Ginevra & Capezza, 2015; Pury &
Hensel, 2010). In relazione a ciò, alcune delle definizioni più frequentemente citate sono
queUe proposte da Rachman (1990) che considera U coraggio come la volontà e la capacità
di affrontare una situazione che spaventa nonostante la presenza di paura, e da Woodard
(2004) secondo il quale il coraggio è l'abilità di agire per una causa significativa (nobile,
buona o concreta), nonostante si sperimenti la paura per una minaccia percepita che è
superiore alle risorse disponibili
L'unificazione del mondo. Alexandre Kojève e lo Stato universale e omogeneo
No full textThe Author reconstructs the genesis and the later developments of the concepts of the «universal and homogeneous State» in Kojève’s writings. From the lectures on Hegel to the Phenomenology of Right and the correspondence with Leo Strauss and Carl Schmitt, the paper analyses Kojève’s thought on the universal and homogeneous State as the political form of the post-historical age. In the last part, the Author reflects on Kojève’s vision of the political form of Europe
Para cuando me vaya
No full textTreballs Finals de Grau de Belles Arts. Facultat de Belles Arts. Universitat de Barcelona, Curs: 2024-2025, Tutora: Lopez Ruido, Maria Luz.[cat] Aquest projecte documental investiga, des d'una mirada crítica i humanista,
com les dones grans perceben el temps en una societat dominada per la
immediatesa i el ritme frenètic del neocapitalisme. A través d'entrevistes,
aquestes dones comparteixen les seves experiències de joventut, marcades
per la guerra i la postguerra i l’inici de la industrialització a Barcelona, a
Cuenca i a Galicia, contrastant-les amb la seva realitat actual.
Les seves veus, sovint ignorades en un sistema que exclou els cossos que no
generen capital, ens conviden a reflexionar sobre la memòria col·lectiva, la
lentitud i la deshumanització del present. El documental esdevé així un espai
de resistència, on aturar-nos dins d’aquesta acceleració constant per escoltar
històries que, tot i ser essencials, han estat relegades al silenci.[eng] This documentary project critically and humanistically explores how elderly
women perceive time in a society dominated by immediacy and the frantic
pace of neoliberalism. Through in-depth interviews, these women share their
experiences of youth, shaped by post-war realities and the rise of
industrialization in Barcelona,Cuenca and Galicia, contrasting them with their
present-day reality.
Their voices, often ignored in a system that excludes bodies that do not
generate capital, invite us to reflect on collective memory, slowness, and the
dehumanization of contemporary life. The documentary thus becomes a
space of resistance, allowing us to pause within this constant acceleration to
listen to stories that, despite being essential, have been relegated to silence
Laboratory measurements of ice nuclei particle concentration in the range of − 29 to − 48 °C
No full textThis work quantifies the natural ice nuclei particle (INP) concentration activated at temperatures (T) lower than −29 °C in Córdoba, a city located in a semiarid region in the center of Argentina. Laboratory INP concentration measurements were performed in a cloud chamber where water supersaturation was reached by an adiabatic isobaric mixture of two air masses with different relative humidities. Once the activated INPs grew up to form ice crystals, these crystals were detected and quantified due to the sparkles they produce when they reflect the light incident on them. Following this methodology, a total of 123 ice crystal (i.e. INP) concentration measurements were performed at a T range of −29 °C to −48 °C.From these measurements it was found that the values of the INP concentration increased with T between −29 °C and approximately −38 °C, but they remained almost constant with T between −38 °C and − 48 °C. This behavior could be related to the dependence of the number of active sites with T. The INP concentration measurements obtained in this work were compared with those reported in recent studies. In addition, considering the elemental composition of the particulate matter in the site of study, we hypothesized that aluminosilicate minerals could be responsible for the INP measurements presented. This assumption was also made by comparing the obtained measurements with different parameterizations reported in the literature. Even though this hypothesis deserves to be tested, this study reports the first INP concentration measurements at temperatures lower than −30 °C in Argentina being one of the few works reporting such measures in the Southern Hemisphere.Fil: Lopez, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Burgesser, Rodrigo Exequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentin
MpI, un nuevo inhibidor peptídico de tripsina y quimotripsina
No full textA partir de semillas de Maclura pomifera (Moraceae) se obtuvo un extracto con actividad inhibitoria de tripsina y quimotripsina que fue parcialmente purificado (1,4 veces) por precipitación acetónica. A partir de dicha preparación empleando cromatografía de exclusión molecular seguida de intercambio iónico se logró purificar un péptido con actividad inhibitoria de tripsina y quimotripsina; los factores de purificación fueron muy elevados: 112 y 109, respectivamente, para las enzimas antes mencionadas. Este nuevo inhibidor, denominado MpI, resultó ser homogéneo por SDS-Tricine PAGE (11 kDa) y por IEF (pI = 5.2). Se determinó la IC50 para tripsina (0,17 microg/ml) y para quimotripsina (0,7 microg/ml). El rendimiento en proteínas fue de 0,09 mg/g semillas.Fil: Lazza, Cristian Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Ciencias Biológicas. Laboratorio de Investigación de Proteínas Vegetales; ArgentinaFil: Caffini, Nestor Oscar. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Ciencias Biológicas. Laboratorio de Investigación de Proteínas Vegetales; ArgentinaFil: Lopez, Laura Maria Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Ciencias Biológicas. Laboratorio de Investigación de Proteínas Vegetales; Argentin
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