Brood parasitism increases mortality of Bay-winged cowbird nests
de Marsico, Maria Cecilia; Reboreda, Juan Carlos
Los tordos parásitos de cría (Molothrus spp.) pueden causar el fracaso total del nido directamente al inducir el abandono de los nidos o destruir la puesta del hospedador, o indirectamente, a través de facilitar la depredación del nido. Examinamos la relación entre el parasitismo de cría y la supervivencia de nidos en Agelaioides badius, el principal hospedero de M. rufoaxillaris y un hospedero secundario de M. bonariensis. Usamos el programa MARK para modelar la supervivencia diaria de los nidos incluyendo efectos hipotéticos de la intensidad de parasitismo, la pérdida de huevos causada por los tordos y el tamaño total de la puesta. El respaldo para cada modelo fue evaluado usando una aproximación basada en la teoría de la información. Más del 50% de los nidos fracasaron antes de completar la incubación, debido principalmente al rechazo o abandono de las puestas parasitadas. El modelo de supervivencia diaria de nidos que tuvo mayor respaldo incluyó el efecto aditivo de la intensidad de parasitismo y el número de huevos picados, que estuvieron relacionados negativamente con la supervivencia del nido. El modelo que incluyó el efecto del tamaño de la puesta no tuvo respaldo. La probabilidad estimada de que un nido sobreviva todo el ciclo de nidificación fue del 35% para nidos no parasitados sin pérdida de huevos. Sin embargo, bajo los niveles de parasitismo observados durante este estudio, la probabilidad de supervivencia varió entre el 0 y 32%. La depredación de nidos durante las etapas de huevo y pichón estuvo relacionada positivamente con el número de huevos y pichones parásitos, respectivamente, lo que sugiere que el parasitismo de M. rufoaxillaris y M. bonariensis también podría facilitar la depredación de nidos de A. badius.; Brood-parasitic cowbirds (Molothrus spp.) can cause total nest failure directly by inducing nest desertion or by destroying the host's clutch or indirectly by facilitating nest predation. We examined the relationship between brood parasitism and nest survival in the Bay-winged Cowbird (Agelaioides badius), the primary host of the Screaming Cowbird (M. rufoaxillaris) and a secondary host of the Shiny Cowbird (M. bonariensis). We used the program MARK to model daily nest-survival rates, including hypothesized effects of intensity of parasitism, egg losses caused by cowbirds, and total clutch size. Support for each model was evaluated by an informationtheoretic approach. More than 50% of the nests failed before incubation was completed, mainly because of the ejection or desertion of parasitized clutches. The model of daily nest survival with best support included the additive effects of intensity of parasitism and number of eggs lost, which were negatively related to nest survival. The model including the effect of clutch size did not receive support. The predicted probability of a nest surviving the entire nesting cycle was 35% for unparasitized nests without egg loss, whereas under the levels of parasitism observed during this study the probability of nest survival varied between 0 and 32%. Nest predation during the egg and nestling stages was positively related to the number of cowbird eggs and chicks, respectively, suggesting that parasitism by Screaming and Shiny Cowbirds may also facilitate depredation of Bay-winged Cowbird nests.
Libros de texto de Química: ¿fuentes de comunicación o incomunicación?
Ali, Salvador; Di Giacomo, María A.; Galagovsky, Lydia Raquel; Gemelli, María E.; Giudice, Jimena; Lacolla, Liliana; Pepa, Lorena; Porcel de Peralta, Cecilia
La adquisición del conocimiento en el área de la química requiere la comprensión de lenguajes específicos. En el marco de la carrera del Profesorado Universitario en Química de la Facultad de Ciencias Exactas y Naturales (UBA), en la materia Didáctica Especial y Práctica de la Enseñanza I, se trabaja sobre el análisis de textos disciplinares con el objetivo de analizar dificultades en la interpretación de los diferentes lenguajes utilizados en química y de diferenciar la mirada de expertos y novatos al respecto. La reflexión metacognitiva derivada de esta actividad conduce a tomar conciencia sobre cómo los distintos niveles de representación y los lenguajes utilizados en los textos son origen probable de dificultades en la comprensión de los estudiantes.
Indigo production by Pseudomonas sp. J26, a marine naphthalene-degrading strain
Riva Mercadal, Juan Pablo; Isaac, Paula; Siñeriz, Faustino; Ferrero, Marcela Alejandra
A technique developed to determine naphthalene dioxygenase (NDO) activity was optimized and used to study the biotransformation of indole to indigo by Pseudomonas sp. J26 whole cells. The maximum production of indigo was achieved at 25 °C using 2.5 mM indole when J26 was grown in the complex medium JPP, while indole concentrations higher than 4 mM proved toxic for cells. The maximum rate of indigo production was 0.56 nmol min–1 mg dry biomass–1, obtaining 75.5 μM of indigo after 8 h of incubation, while a maximal concentration (138.1 μM) of indigo was obtained after 20 h.
Influencia de la madurez sexual y la castracion sobre la actividad electrica cardiaca en conejos machos y hembras; Influence of sexual maturity and gonadectomy on cardiac electrical activity in male and female rabbits
Eizikovits, Gabriela Yael; Casal, Carolina; Arini, Pedro David; Bertran, Guillermo Claudio
Es bien conocida la existencia de diferencias en la actividad eléctrica cardíaca asociadas al sexo. Si bien estas diferencias habitualmente se relacionan al efecto de la madurez y de las hormonas sexuales gonadales, todavía existen controversias al respecto. El objetivo de este trabajo fue evaluar el efecto que la madurez sexual y la castración producen sobre los distintos parámetros del electrocardiograma de superficie y de la duración de los potenciales de acción (DPA). Se utilizaron conejos jóvenes (menores de un mes de edad) y adultos (mayores de seis meses de edad). Las diferencias obtenidas en las hembras se observan en la repolarización tardía, mientras que en los machos ocurren en la repolarización temprana. Existiría una relación entre las diferencias observadas en la duración desde el pico máximo hasta el fin de la onda T (Ttpf) y las observadas en la DPA al 90% de la repolarización (DPA90) en las hembras, mientras que en los machos la relación existe entre la duración desde el punto J hasta el pico máximo de la onda T (JTp) y la DPA al 30 y 50% de la repolarización (DPA30 y DPA50). Si bien existen diferencias que podrían ser debidas a factores hormonales otras serían debidas a factores no hormonales.; Sex-associated differences in cardiac electrical activity have already been documented. Even though these differences are usually associated with the effect of maturity and sex hormones, there are still some controversial points to this respect. The aim of this study was to evaluate the effects of maturity and gonadectomy on the different parameters of surface electrocardiogram and the duration of the action potential in young and adult rabbits. The differences obtained in females were observed in late repolarization, whereas in males took place in early repolarization. There was a relationship between the differences observed in the duration from the peak to the end of the T wave and those observed in the duration of the action potential to 90% of repolarization in females, whereas in males the relationship exists between the duration from the point J to the peak of the T wave and the duration of the action potential at 30 and 50% of repolarization. Differences could be related to hormonal or non-hormonal factors.
Sedimentología y paleoambientes del Patagoniano y su transición a la Formación Santa Cruz al sur del Lago Argentino, Patagonia Austral; Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, Southern Patagonia
Cuitiño, José Ignacio; Scasso, Roberto Adrian
El Patagoniano aflorante al sur del Lago Argentino en este sector de la cuenca Austral fue formalmente llamado como Formación Centinela, y en este trabajo se propone el nuevo nombre de Formación Estancia 25 de Mayo. Consiste de aproximadamente 180 metros de areniscas fosilíferas. Sobre la base de sus características litológicas (textura, composición, estructuras sedimentarias) y su contenido fosilífero (abundancia, diversidad, orientación y alteración de bioclastos) se describieron 12 litofacies, 9 de ellas epiclásticas y las 3 restantes bioclásticas. El análisis vertical de facies permitió agrupar las facies en tres asociaciones. Las asociaciones de facies I y II en la Formación Estancia 25 de Mayo, se corresponden con dos miembros formales: el Miembro Quién Sabe, dominado por areniscas sin estructuras sedimentarias mecánicas, muy bioturbadas y fosilíferas; y el Miembro Bandurrias, dominado por ciclos granodecrecientes de areniscas con estratificación entrecruzada y facies heterolíticas. La asociación de facies III representa las facies basales de la Formación Santa Cruz, con abundantes lags conglomerádicos y facies pelíticas ricas en fragmentos vegetales, con evidencias de pedogénesis. Se interpreta al Miembro Quién Sabe como producto de una transgresión marina, que instauró un mar somero, en donde se generaron acumulaciones biogénicas de ostras, y que culmina con facies de planicie costera. Una nueva transgresión produce una discontinuidad sobre la que descansa el Miembro Bandurrias, el cual representa la progradación de un sistema estuarial. Finalmente, la progradación continúa con los depósitos fluviales meandriformes de la Formación Santa Cruz.; Sedimentology and paleoenvironments of the Patagonian and the transition to the Santa Cruz Formation south of Lago Argentino, Southern Patagonia. The Patagoniano exposed to the south of Lago Argentino is formally known as Centinela Formation in this part of the Austral Basin, and the new name Estancia 25 de Mayo Formation is proposed here. It consists of approximately 180 m of fossiliferous sandstones divided in twelve lithofacies (nine epiclastic and the remaining three bioclastic), on the basis of their lithologic characteristics (texture, composition, sedimentary structures) and fossiliferous content (bioclast abundance, diversity, orientation and degradation). The vertical facies analysis allowed grouping the twelve lithofacies into three facies associations. Facies associations I and II correspond to two new formal members: the Quién Sabe Member, dominated by fossiliferous, highly bioturbated sandstones, mostly lacking physical sedimentary structures; and the Bandurrias Member, dominated by fining upward cycles of cross stratified sandstones and heterolithic facies. Facies association III represents the basal facies of Santa Cruz Formation, rich in conglomeratic lags and mudstones whit plant remains and soil modification. The Quién Sabe Member was deposited in a shallow sea resulting from a marine transgression, with common biogenic oyster accumulations, capped by coastal plain facies. The Bandurrias Member rests on a discontinuity formed during a new marine transgression and represents the progradation of an estuarine system. Continuous progradation led to the accumulation of the fluvial meandering continental sediments of the Santa Cruz Formation.
Propiedades poliméricas de cadenas de κ-carragenano a diferentes temperaturas; Polymeric properties of κ-carrageenan chains at diferents temperatures
Villegas, M.; Guidugli, S.; Esteban, C.; Fernandez Gauna, María Cecilia; Pantano, S.; Paoletti, S.; Benegas, Julio Ciro
Este trabajo describe la dependencia con la temperatura de la longitud de persistencia y el cociente característico de cadenas del polisacárido iónico κ-carragenano. Estas propiedades poliméricas fueron calculadas en una asamblea estadística de cadenas largas (n=900) construidas con un algoritmo de Monte Carlo que utiliza resultados de dinámica molecular para asignar probabilidades para la agregación de unidades poliméricas a una cadena en construcción. Los resultados muestran que al bajar la temperatura de la solución de 363K a 282K la longitud de persistencia de las cadenas casi se duplica, obteniéndose a 282K un valor de 7 nm, muy cercano al valor experimental. Este comportamiento indica que al bajar la temperatura las cadenas se ordenan y vuelven más rígidas, condiciones esenciales para la formación de los geles termoreversibles y mesofases ordenadas que caracterizan a este polisacárido iónico en solución acuosa.; This work describes the temperature dependence of persistence lengths and characteristic ratios of 900 residues long κ−carrageenans chains. These polymeric properties were calculated on an appropriate ensemble of calculated long chains (n=900), which were built with a Monte Carlo algorithm that assigned conformational probabilities based on the results of previously run molecular dynamics simulations. In very good agreement with experimental results, a value of 7nm is obtained for the calculated persistence length at 282K, which almost double the value calculated at 363K. This behavior indicates that the κ−carrageenans chains become more rigid and ordered at low temperatures, the basic condition for chain association leading to the formation of the thermo reversible gels and ordered mesophases that characterize this polysaccharide in aqueous solutions.
Hepatitis B virus, hepatitis C virus and HIV coinfection among people living with HIV/AIDS in Buenos Aires, Argentina
Laufer, Natalia Lorna; Quarleri, Jorge Fabian; Bouzas, María B.; Juncos, Gerardo; Cabrini, Mercedes; Moretti, Franco; Bolcic, Federico Martin; Fernández Giuliano, Silvina; Mammana, Lilia; Salomon, Horacio Eduardo; Cahn, Pedro
The HIV epidemic in Argentina has changed since the first case was reported in 1982. Since the beginning of the 1990s, a decrease in the number parenterally acquired infections has been observed, with a marked increase in transmission through unprotected sexual contact (heterosexual and homosexual), and in the number of women living with HIV/AIDS.
Largevolumeinjection of water in gaschromatography–massspectrometry using the Through Oven TransferAdsorptionDesorption interface: Application to multiresidueanalysis of pesticides
Toledano, Rosa; Cortés, José; Andini, Juan Carlos; Villén, Jesús; Vázquez, Ana
In the present work, the potential of the Through Oven Transfer Adsorption Desorption (TOTAD) interface for the large volume injection (LVI) of aqueous samples in gas chromatography (GC) using a mass spectrometry (MS) detector is demonstrated. To this end, a new method for the determination of pesticides in water is presented, being the first developed method in which injection of large amounts of polar solvents using the TOTAD interface and an MS detector are combined, is applied to the determination of pesticides in water. Water samples, as large as 5 ml, were directly injected into a capillary GC. No sample pre-treatment step other than simple filtration was needed. The TOTAD interface allows the introduction of several millilitres of water, while maintaining good chromatographic characteristics. The water is almost entirely eliminated, so that LVI of aqueous samples and an MS detector can be used without problems. Organophosphorus, organochlorine, and triazine pesticides were determined in one run. Calibration curves were linear in the range tested and the sensitivity achieved injecting 5 ml of water sample was sufficient for most of the target pesticides but not for all of them. Sensitivity of the analysis can be improved by increasing the sample volume. No variability was observed in the retention times and relative standard deviations from absolute peak areas were good, considering that they corresponded to the overall analysis. The method was applied to the analysis of pesticide residues in real water samples.
"Time sweet time": circadian characterization of galectin-1 null mice
Casiraghi, Leandro Pablo; Croci Russo, Diego Omar; Poirier, Francoise; Rabinovich, Gabriel Adrian; Golombek, Diego Andres
Recent evidence suggests a two-way interaction between the immune and circadian systems. Circadian control of immune factors, as well as the effect of immunological variables on circadian rhythms, might be key elements in both physiological and pathological responses to the environment. Among these relevant factors, galectin-1 is a member of a family of evolutionarily-conserved glycan-binding proteins with both extracellular and intracellular effects, playing important roles in immune cell processes and inflammatory responses. Many of these actions have been studied through the use of mice with a null mutation in the galectin-1 (Lgals1) gene. To further analyze the role of endogenous galectin-1 in vivo, we aimed to characterize the circadian behavior of galectin-1 null (Lgals1-/-) mice.
The role of glycosides in the light-stabilization of 3-hydroxyflavone (flavonol) dyes as revealed by HPLC
Zhang, Xian; Cardon, Dominique; Cabrera, Jose Luis; Laursen, Richard
Before the advent of synthetic dyes, textiles were colored primarily with extracts of plants, many of which, in the case of yellow colors, were flavonoids. One important Asian yellow dye source was buds from the pagoda tree (Sophora japonica). Using reversed phase HPLC to separate the flavonoid components of plants and of dyed textiles, and UV/Visible and mass spectrometry to detect and identify them, we have shown that the buds of pagoda trees (Sophora japonica) contain an enzyme that converts light-stable rutin, the 3-O-rutinoside of quercetin, to light-unstable quercetin. This work provides an explanation for why 3-O-substituted, rather than unsubstituted, 3-hydroxyflavones, are generally, in our experience, found in extracts of historical textiles; it also shows how, i.e., by heat inactivation of glycosidases, 3-O-substituted hydroxyflavones could have been selected for. Some other dye-producing plants, e.g., Reseda luteola and Flaveria haumanii, also appear to contain glycosidases. The need for proper processing of dyestuffs, e. g., by heat treatment, was probably recognized by dyers in ancient times, even if the processes were not understood.
Setting priorities in clinical and health services research: Properties of an adapted and updated method
Berra, Silvina del Valle; Sánchez, Emília; Pons, Joan M. V.; Tebé, Cristian; Alonso, Jordi; Aymerich, Marta
Objectives: The objectives of this study is to review the set of criteria of the Institute of Medicine (IOM) for priority-setting in research with addition of new criteria if necessary, and to develop and evaluate the reliability and validity of the final priority score. Methods: Based on the evaluation of 199 research topics, forty-five experts identified additional criteria for priority-setting, rated their relevance, and ranked and weighted them in a three-round modified Delphi technique. A final priority score was developed and evaluated. Internal consistency, test–retest and inter-rater reliability were assessed. Correlation with experts’ overall qualitative topic ratings were assessed as an approximation to validity. Results: All seven original IOM criteria were considered relevant and two new criteria were added (“potential for translation into practice”, and “need for knowledge”). Final ranks and relative weights differed from those of the original IOM criteria: “research impact on health outcomes” was considered the most important criterion (4.23), as opposed to “burden of disease” (3.92). Cronbach's alpha (0.75) and test–retest stability (interclass correlation coefficient = 0.66) for the final set of criteria were acceptable. The area under the receiver operating characteristic curve for overall assessment of priority was 0.66. Conclusions: A reliable instrument for prioritizing topics in clinical and health services research has been developed. Further evaluation of its validity and impact on selecting research topics is required.
Molecular Relationships Between Saccharomyces cerevisiae Strains Involved in Winemaking from Mendoza, Argentina
Mercado, Laura Analia; Jubany, Sandra; Gaggero, Carina; Masuelli, Ricardo Williams; Combina, Mariana
Three molecular typing techniques were applied to assess the molecular relationships of Saccharomyces cerevisiae strains isolated from winery equipment, grapes, and spontaneous fermentation in a cellar located in ‘‘Zona Alta del Rı´o Mendoza’’ (Argentina). In addition, commercial Saccharomyces strains widely used in this region were also included. Interdelta PCR typing, mtDNA restriction analysis, and microsatellite (SSR) genotyping were applied. Dendrograms were constructed based on similarity among different patterns of bands. The combination of the three techniques discriminated 34 strains among the 35 isolates. The results of this study show the complex relationships found at molecular level among the isolates that share the same ecological environment, i.e., the winemaking process. With a few exceptions, the yeast isolates were generally clustered in different ways, depending on the typing technique employed. Three clusters were conserved independently of the molecular method applied. These groups of yeasts always clustered together and had high degree of similarity. Furthermore, the dendrograms mostly showed clusters combining strains from winery and fermentation simultaneously. Most of the commercial strains included in this study were clustered separately from the other isolates analyzed, and just a few of them grouped with the strains mainly isolated from spontaneous fermentation. Only one commercial strain was clustered repetitively with a noncommercial strain isolated from spontaneous fermentation in the three dendrograms. On the other hand, this study has demonstrated the importance of selecting an appropriate molecular method according to the main objectives of the research.
Realistic spatial and temporal earthquake distributions in a modified Olami-Feder-Christensen model
Jagla, Eduardo Alberto
The Olami-Feder-Christensen model describes a limiting case of an elastic surface that slides on top of a substrate and is one of the simplest models that display some features observed in actual seismicity patterns. However, temporal and spatial correlations of real earthquakes are not correctly described by this model in its original form. I propose and study a modified version of the model, which includes a mechanism of structural relaxation. With this modification, realistic features of seismicity emerge, which are not obtained with the original version, mainly: aftershocks that cluster spatially around the slip surface of the main shock and follow the Omori law, and averaged frictional properties similar to those observed in rock friction, in particular the velocity-weakening effect. In addition, a Gutenberg-Richter law for the decaying of number of earthquakes with magnitude is obtained, with a decaying exponent within the range of experimentally observed values. Contrary to the original version of the model, a realistic value of the exponent appears without the necessity to fine tune any parameter.
Cuerpo, sufrimiento y cultura; un análisis del concepto de “técnicas corporales” para el estudio del intercambio lástima‐limosna como hecho social total
Matta, Juan Pablo
En este artículo se abordan diferentes aspectos ligados a las formas en que el sufrimiento es dado y retribuido socialmente. En un primer momento se problematiza la temática buscando situar al sufrimiento en el marco de un sistema más amplio de intercambios que enlaza sociológicamente la acción de dar lástima (mediante la cual el sufrimiento es dado) con la práctica de la limosna. En segundo lugar se recupera el concepto mausseano de hecho social total que, a la vez que ilumina la naturaleza multidimensional de la problemática, esclarece las formas por medio de las cuales lo individual y lo colectivo se articulan en las obligaciones concretas que el intercambio moviliza. Finalmente, y desde la perspectiva que proyectan los anteriores conceptos, se explora la dimensión sociocultural del sufrimiento a través de la categoría analítica de “técnicas corporales”. Mediante este concepto se busca reconstruir algunas de las lógicas sociales que subyacen al fenómeno del sufrimiento proponiendo que el mismo sólo encuentra su sentido en el marco de las relaciones sociales en las que se expresa.
Construíndo unha pequena Euskal Herria na pampa húmida, Tandil, Arxentina
Irianni, Marcelino
A mediados do século XX, un grupo de exiliados vascos arriba á provincia de Bos Aires e atomízase en distintas cidades, varias delas cunha forte comunidade euscalduna arraigada social e economicamente dende 1850. Ese milleiro de vascos que construíran unha pequena Euskal Herria toponímica e comercial nun sector determinado da cidade acollen os acabados de chegar e con eles toman o impulso necesario para fundar a primeira institución euscalduna da cidade. Por que non o ¬xeron antes? Acaso porque existían os espazos de sociabilidade étnica su¬cientes en hoteis, almacéns e romarías, aínda que abertos, presentábanse como reservas dos costumes do vello pobo pirenaico. A decadencia dos hoteis étnicos, da man do corte do uxo migratorio, foi decisiva para que intentasen ter unha casa propia; os sucesos da Península, afogados portas a dentro e ocultos ao público, ¬xeron o resto. O Gure Etxea, nacido en 1949, funde as súas raíces no século XIX, pero medra co coidado dunha presada de exiliados. Palabras clave: exilio, comunidade, identidade, minoría, representación.
¿Un observatorio no observado? Un edificio de Monte Albán según los primeros arqueólogos
Schavelzon Chavin, Daniel Gaston
El presente artículo aborda la historia de las exploraciones llevadas a cabo en un edificio de Monte Albán, Oaxaca, conocido como Edificio Sureste, el cual pudo haber tenido la función de un observatorio cenital, de acuerdo con las evidencias analizadas. Sin embargo, los trabajos de consolidación y restauración posteriores parecen no haber tomado en cuenta dichos antecedentes, perdiéndose así los rasgos excepcionales que le daban su carácter distintivo en el contexto de la arquitectura zapoteca.
Mar del Plata para mirar y para mostrar… Acerca del encanto de las tarjetas postales
Mendez, Patricia Susana
Este texto refiere a la importancia que tuvo la fotografía como canal de comunicación en tanto aspectos urbanos y reflejo de la ciudad de Mar del Plata como centro turístico a principios del siglo XX fundamentalmente a través de las tarjetas postales.
Perspectivas de los médicos acupuntores sobre su práctica y el potencial de la medicina integrativa; Perspectives of acupuncture practitioners on their practice and the potential of integrative medicine
Freidin, Betina
Basándonos en 18 entrevistas en profundidad con médicos que han incorporado en su práctica clínica la acupuntura, analizamos cómo ellos definen la medicina que practican y la diferencian de medicina convencional o alopática. Damos cuenta de los estilos terapéuticos desarrollados por los médicos y de sus perspectivas de cómo el ejercicio de la acupuntura les ha permitido enriquecer su trabajo clínico-asistencial. Al describir su práctica los entrevistados destacan el enfoqueholístico y centrado en el paciente, y la posibilidad de ofrecer soluciones terapéuticas no farmacológicas para varias dolencias crónicas, sea como complemento o alternativa a los tratamientos convencionales. Unos pocos también destacan su anhelo de construir una relación terapéutica menos paternalista. Los testimonios sugieren un proceso de diferenciación y segmentación dentro de la profesión médica en torno a valores, identidades y compromisos de sus miembros.; Based on 18 interviews with physician acupuncturists, we analyze how they define their clinical practice and differentiate it from mainstream or allopathic medicine. We describe their styles of integration and their views of how the practice of acupuncture has enriched their clinical work. Physicians highlight the holistic and patient-centered approach they have engaged with, and point to the possibilities that unconventional medicines open up for physicians to provide gentle modalities of care, either as an alternative or as an adjunct to biomedical care. A few of them also stress their whish to facilitate a less paternalistic patient-doctor relationship. Physicians’ narratives suggest a process of differentiation and segmentation within the medical profession in terms of their members’ values, identities and commitments.
Razón o construcción: reflexiones en torno a las discusiones sobre la "realidad" en psicoterapia
Sarudiansky, Mercedes
El campo de la psicoterapia y la psicología clínica es relativamente nuevo dentro de las ciencias sociales. Su desarrollo ha tenido, desde el principio, marcadas influencias de distintas corrientes científicas -ya sea de las ciencias sociales como de las naturales y exactas-, así como también de la informática y la cibernética. Esto ha llevado a que sea un campo diverso y heterogéneo, que incluye concepciones diferentes acerca del sujeto, el mundo y la realidad. Estas diferencias se plasman no sólo en las distintas teorías y formas de psicoterapia que existen en la actualidad, sino también en los debates que se producen en el seno de una misma corriente psicoterapéutica.
