Search results for "Conducta"
showing 10 items of 611 documents
A Field Experiment on Perspective-Taking, Helping, and Self-Awareness
2006
The present field experiment examines the effect of self-awareness on adult perspective-taking and on prosocial behavior. University students at an Italian university were interviewed briefly on their campus, and for half of them self-awareness was induced by asking them to hold a mirror before their faces. In the same context they then had to choose between a postcard written in Italian and 1 written in English, to be sent to England. This led to a measure of perspective-taking, and their actual readiness to mail the postcard was taken as an index of prosocial or helping behavior. Both perspective-taking and helping behavior were boosted considerably by self-awareness.
Revista de psicología social
2000
Resumen tomado del autor. Resumen en castellano e inglés La relevancia que las relaciones entre compañeros tienen en el desarrollo psicosocial del niño, así como las consecuencias negativas de sus dificultades, han merecido una considerable atención de los investigadores ( Parker y Asher, 1987). Sin embargo, es todavía necesaria una mayor clarificación de las diferencias existentes entre los niños con problemas de integración social y sus compañeros bien adaptados socialmente. Este es el objetivo principal de esta investigación. La muestra está configurada por 537 alumnos, de ambos sexos y de edades comprendidas entre los 10 y 16 años. También, se contó con la colaboración de 21 profesores.…
Aproximaciones Psicosociales a la Corrupción: Una Revisión Teórica
2017
Corruption is widespread in current societies; despite its social relevance, it has been studied mostly from economic perspectives. The article reviews and critically analyzes corruption from different social psychology approaches, both in the Anglophone and Latin American settings. Regarding the former, the article highlights the influence of peer behaviors and social norms, risk perceptions, the role of emotions, behavioral ethics and the relationship of corruption to power Regarding the latter, the Latin American models focus on the influence of supra-individual structures such as ethical values and institutions on the individual’s conduct. It is proposed that research on this topic look…
Large Conductance Switching in a Single-Molecule Device through Room Temperature Spin-Dependent Transport
2016
Controlling the spin of electrons in nanoscale electronic devices is one of the most promising topics aiming at developing devices with rapid and high density information storage capabilities. The interface magnetism or spinterface resulting from the interaction between a magnetic molecule and a metal surface, or vice versa, has become a key ingredient in creating nanoscale molecular devices with novel functionalities. Here, we present a single-molecule wire that displays large (>10000%) conductance switching by controlling the spin-dependent transport under ambient conditions (room temperature in a liquid cell). The molecular wire is built by trapping individual spin crossover Fe-II comple…
Effects of elevated ozone on physiological, anatomical and ultrastructural characteristics of four common urban tree species in China
2016
Fast urbanization has led to ozone (O3) being the main pollutant in summer in most of China. To assess future ground-level O3 effects on the service of urban greening species and clarify the underlying mechanism of O3 damage, four common urban greening species, Ailanthus altissima (AA), Fraxinus chinensis(FC), Platanus orientalis (PO) and Robinia pseudoacacia (RP) were exposed to non-filtered air (NF) and to elevated O3 (E-O3) in open-top chambers. E-O3 induced visible injury in all species as well as microscopic alterations such as collapse of the palisade parenchyma cells, callose accumulation, or chloroplast and mitochondrial accelerated senescence. E-O3 significantly reduced light-satur…
Deficit irrigation does not affect alternate bearing of ‘Valencia’ orange trees
2018
This study evaluated the effect of long-term partial rootzone drying and continuous deficit irrigation on the degree of alternate bearing of adult ‘Valencia’ orange trees grown in northern Sicily. Three irrigation strategies were imposed in summer from 2007 to 2011: irrigation with volumes corresponding to 100% of crop evapotranspiration applied to entire rootzone (CI), partial rootzone drying (PRD) with 50% of CI water applied to one alternated side of the rootzone, and continuous deficit irrigation (CDI) with 50% of CI water applied to both sides of the rootzone. The experiment was conducted on 48 adult orange trees arranged according to a randomized block design. Weather and soil paramet…
Ni2+ toxicity in rice: effect on membrane functionality and plant water content.
2007
The heavy metal nickel is an essential mineral trace nutrient found at low concentrations in most natural soils. However, it may reach toxic levels in certain areas and affect a number of biochemical and physiological processes in plants. Wilting and leaf necrosis have been described as typical visible symptoms of Ni(2+) toxicity. The plasma membrane (PM) of root cells constitutes the first barrier for the entry of heavy metals but also a target of their toxic action. This work studies the relationship between disturbances of membrane functionality and the development of the typical symptoms of Ni(2+) toxicity. Rice plants (Oryza sativa L. cv. Bahia) grown in nutrient medium containing 0.5m…
Effects of long-term ozone exposure on citrus: Chlorophyll a fluorescence and gas exchange
2006
Three-years-old trees of Satsuma mandarin (Citrus unshiu [Mak.] Marc.) cv. Okitsu were exposed to O-3 fumigation during long term (one year) in open-top chambers. As a result of the treatment, chlorophyll a fluorescence and gas exchange parameters were modified with respect to trees growing in O-3-free conditions. Net photosynthetic rate and stomatal conductance decreased and intercellular CO2 concentration increased according to a reduction of the non-cyclic electron flow and a lower capacity to reduce the quinone pool. O-3 also reduced the development of non-photochemical quenching preventing the dissipation of excess excitation energy and, therefore, generated several alterations in phot…
Foliar characteristics, cambial activity and wood formation in Azadirachta indica A. Juss. as affected by coal–smoke pollution
2010
Abstract This study, aimed at elucidating changes in the foliar and cambial behavior in Azadirachta indica (Neem tree) due to coal-smoke pollution, has revealed inhibitory effects of pollution stress on leaf pigments concentrations, nitrate reductase activity and the contents of reducing sugars and total N content, whereas stimulatory effects were given on stomatal index and nitrate and sulphur contents. Under smoke effects, stomatal conductance was low, leading to a drop in the net photosynthetic rate and a rise in the internal CO2 concentration of leaf. Cambial reactivation in the stem was delayed at the polluted site. Although the total span of the cambial activity was reduced, greater a…
Influence of Ecklonia maxima Extracts on Growth, Yield, and Postharvest Quality of Hydroponic Leaf Lettuce
2021
Ecklonia maxima is a brown algae seaweed largely harvested over the last years and used to produce alginate, animal feed, fertilizers, and plant biostimulants. Their extracts are commercially available in various forms and have been applied to many crops for their growth-promoting effects which may vary according to the treated species and doses applied. The aim of the study was to characterize the effect of adding an Ecklonia maxima commercial extract (Basfoliar Kelp