Search results for "relationship"
showing 10 items of 3616 documents
Switchable Bactericidal Effects from Novel Silica-Coated Silver Nanoparticles Mediated by Light Irradiation
2011
Here we report on the triggering of antibacterial activity by a new type of silver nanoparticle coated with porous silica, Ag@silica, irradiated at their surface plasmon resonant frequency. The nanoparticles are able to bind readily to the surface of bacterial cells, although this does not affect bacterial growth since the silica shell largely attenuates the intrinsic toxicity of silver. However, upon simultaneous exposure to light corresponding to the absorption band of the nanoparticles, bacterial death is enhanced selectively on the irradiated zone. Because of the low power density used for the treatments, we discard thermal effects as the cause of cell killing. Instead, we propose that …
El impacto de las nuevas tecnologías de la información y de la comunicación en el sistema escolar
2004
Una de las finalidades de la escuela como institución es insertar a los alumnos, niños y adolescentes por lo general, en la cultura desarrollada en un contexto social y económico más diverso. Los centros escolares reciben numerosos estímulos para aceptar las reglas impuestas por los grupos hegemónicos en el sistema de reproducción social. Por ello la incorporación de las nuevas tecnologías representa, como en su momento fue la imprenta y los medios audiovisuales, una oportunidad para difundir el conocimiento entre un mayor número de ciudadanos, pero -al mismo tiempo- supone un riesgo de una asimilación cultural mecánica, poco crítica y que forme más a clientes que a ciudadanos.
UV Exposure Boosts Transcutaneous Immunization and Improves Tumor Immunity: Cytotoxic T-Cell Priming through the Skin
2010
Immunologic approaches to combat cancer aim at the induction of tumor-reactive immune responses to achieve long-term protection. In this context, we recently developed a transcutaneous immunization (TCI) method using the Toll-like receptor (TLR) 7 agonist imiquimod and a peptide epitope. Application onto intact skin induces potent cytotoxic T lymphocyte (CTL) responses and protection against transplanted tumors. The purpose of this study was to explore the effects of UV irradiation on imiquimod-based TCI. Here we show that skin exposure to low-dose UV light before TCI with imiquimod strongly boosts specific CTL responses leading to memory formation and enhanced tumor protection. Toward the …
Closure to “Experimental Study of the Stage-Discharge Relationship for an Upstream Inclined Grid with Longitudinal Bars” by C. Di Stefano and V. Ferro
2014
The discusser would like to thank the authors of the original paper for investigating the outflow process of an upstream inclined grid with longitudinal bars using the dimensional analysis and the incomplete self-similarity theory. The discusser, however, would like to add a few points. Using the theoretical analysis the authors of the original paper showed that a power equation can be used for establishing the stage-discharge equation of an upstream inclined grid with longitudinal bars. The authors of the original paper also showed that the coefficient and exponent of the power equation depend on the slope angle and the void ratio. They proposed a stage-discharge equation
Advances in designing drip irrigation laterals
2018
It is known that using paired laterals, in which two distribution pipes extend in opposite directions from a common manifold, contribute to increasing water use efficiency (WUE). Recently, an analytical procedure to optimally design paired drip laterals on uniform slopes was proposed. More recently, this design procedure was simplified by deriving simple explicit relationships, as a function of 16 calibration constants, with relative errors that were less than 2%. In this paper, further simple design relationships are derived that require only 3 calibration constants, thus more readily obtainable results are produced and the influence of the flow rate and diameter exponents of resistance eq…
Sequent Depth Ratio of a B-Jump
2011
A B-jump is defined as the jump having the toe section located on a positively sloping upstream channel and the roller end on a downstream horizontal channel. This jump often occurs in the stilling basins with a horizontal bottom and located downstream of a steep channel. For a B-jump, a completely theoretical approach is not sufficient to solve the momentum equation and to establish the sequent depth ratio. In this paper, by using the laboratory measurements carried out in this investigation, some available empirical relationships useful for estimating the sequent depth ratio are tested. Then, by using the Π theorem of the dimensional analysis and the incomplete self-similarity theory, a g…
Interpersonal Relationship Aspects as Perceived Risk and Social Support Factors in a Clinical Sample of Adolescents With Depression
2020
Abstract The goal of this qualitative study was to explore how adolescents with diagnosed depression describe their social relationships with peers, parents and teachers. Several previous findings have revealed the dual role of interpersonal relationships — as a stressor and contributor to different mental disorders, and also as a source of social support for mental health. Previous studies confirmed the value of a qualitative approach in exploring the self-perceived experiences of adolescents. The research group consisted of 28 adolescents, aged 13–17, with a diagnosis of depression. Individual semistructured interviews (Children's Depression Rating Scale Revised; CDRS-R) were applied in t…
An examination of parents’ and preschool workers’ perspectives on bullying in preschool
2016
ABSTRACTParents (n = 141) and preschool workers (n = 81) completed a survey regarding their perspectives towards: (a) the existence of bullying in preschool, (b) interpretations of bullying, (c) the roles of bullies and victims, and (d) gender differences. Findings suggest that both groups largely believe that bullying occurs in preschool. Excluding others from play, conditional threats, and the victim's perception of being bullied were the three conditions most likely to be associated with bullying. Parents were significantly more likely than workers to hold a negative view of bullies and believe that bullying differs with regard to gender. Whereas most participants felt that bullying coul…
The diversity of romantic pathways during emerging adulthood and their developmental antecedents
2016
The present study examined patterns of romantic pathways in 100 Israeli emerging adults (54 males) who were followed from age 22 to 29 years. Analyses of interviews at age 29 yielded four distinctive romantic pathways differing in stability and ability to learn from romantic experiences: Sporadic, Lengthy Relationships but Absence of Experiential Learning, Moving from Casual to Steady Involvements, and Steady Relationships. Low efficacy, immature dependency, and level of maternal support measured 7 years earlier, predicted less optimal romantic pathways; Sporadic, and Lengthy relationships but absence of experiential learning. Distinctive gender pathways suggested that men are more likely …