Search results for "juvenil"
showing 10 items of 450 documents
Covalent modificaition of juvenile hormone binding proteins by photoaffinity labeling: An unexpected gel shift effect
1994
The 32 kD juvenile hormone binding protein (JHBP) and two 80 kD proteins in larval Manduca sexta hemolymph were labeled with [3H]FDK, a photoaffinity analog of methyl farnesoate (MF). The labeling could be completely displaced by a 30-fold excess of either MF or JH II, demonstrating that [3H]FDK binds specifically to the JH binding sites of the 32 kD JHBP and the 80 kD proteins. In addition, a high molecular-mass protein was labeled with [3H]FDK; labeling could be displaced by excess MF but not by JH II, demonstrating the selectivity in binding MF. The 32 kD JHBP also appeared to weakly bind the potent juvenoid, methoprene, at the JH binding site. Covalent modification by [3H]FDK induced a …
Micropropagation of bay laurel (Daphne gnidiumL.)
1996
SummaryProcedures have been developed for the micropropagation of Daphne gnidium, a shrub species of ecological interest, using explants of juvenile and adult origin. Shoot proliferation rates were significantly affected by both salt formulation and benzylade- nine concentration. Best results were obtained on WP medium with 5 µM BA. The presence of indoleacetic acid in the induction medium improved BA-induced axillary bud proliferation from juvenile explants. Rooting of shoots produced in culture was difficult, especially those of adult origin. Besides an absolute requirement for auxin, calcium concentration and the pH of the medium affected the formation of adventitious roots from regenera…
Micropropagation of juvenile and adult Sorbus domestica L.
1991
Successful propagation of seedlings and mature trees of Sorbus domestica L. has been achieved by in vitro methods. Multiple shoot formation was obtained by placing shoot apices or nodal segments on a modified Schenck and Hildebrandt medium containing benzyladenine. Regenerated shoots were excised and induced to root on media with auxin. In the best treatments 75–85% of shoots from juvenile material rooted. Rooting capacity of shoots from mature explants was lower (30%) and was not improved by dipping the base of shoots in concentration solutions of indolebutyric or naphthaleneacetic acids. Plantlets were ultimately established in soil.
Biological Activities of Natural Sesquiterpene Lactones and the Effect of Synthetic Sesquiterpene Derivatives on Insect Juvenile Hormone Biosynthesis
1998
Three natural sesquiterpene lactones have been assayed for their biological activity on locust (Locusta migratoria) nymphs. Since results obtained in vivo pointed to disruptions on juvenile hormone (JH)-regulated physiology, we tested the sesquiterpene lactones and a family of synthetic sesquiterpene derivatives for their ability to disturb the rate of JH biosynthesis by locust corpora allata (CA) in vitro. All the active compounds in vitro share a basic sesquiterpene double-ring structure as well as substituents with different chemical complexities. Compounds that shared an eudesmane base with different oxidation states on C3 and C12 carbon atoms were tested as JH biosynthesis inhibitors. …
Child Abuse, Neglect, and Violent Criminal Behavior in a Midwest Metropolitan Area of the United States, 1967-1988
1991
These data examine the relationships between childhood abuse and/or neglect and later criminal and violent criminal behavior. In particular, the data focus on whether being a victim of violence and/or neglect in early childhood leads to being a criminal offender in adolescence or early adulthood and whether a relationship exists between childhood abuse or neglect and arrests as a juvenile, arrests as an adult, and arrests for violent offenses. For this data collection, adult and juvenile criminal histories of sampled cases with backgrounds of abuse or neglect were compared to those of a matched control group with no official record of abuse or neglect. Variables contained in Part 1 include …
Watersport and juvenile criminal justice: social projects for individual and community well-being
2023
Background:Intervention projects in social and psychological fields envisage actions aimed at creating a network not only among institutions and informal support but also an opportunity for the promotion of well-being, individuals and communities. Methods:This project was based on an active and individual-centered approach that involved in 2020, 6 young people from the Palermo Juvenile Prison, involving their awareness and participation in planned activities that involved the use of a water sport (snorkeling) to offer them an opportunity for change. Results:The adoption of watersport has been a successful methodology, as they are based on sharing standards, individual responsibility and mut…
Correlatos psicosociales en menores infractores en España
2023
La adolescencia es un periodo de tiempo que sucede entre la edad adulta y la infancia, en la que tienen lugar numerosos cambios a nivel biológico, psicológico y social (Carrascosa, 2019; Castillo, 2004; Maccoby, 1983; Martínez, 2016; Martínez et al., 2012; Motrico et al., 2001; Quintian-Bustos et al., 2020). Estos cambios generarán la creación de la identidad del menor así como la madurez del adulto en el que se va a convertir (Mayorga-Sierra, 2019). Cuando estos menores llevan a cabo conductas tipificadas por la ley y aún no poseen la mayoría de edad penal se le denomina delincuente juvenil y se le impone una pena (Cerón, 2013; Kazdin y Buela-Casal, 1999; Martínez, 2016). Este concepto es …
Isolated coronary anomalies and sudden death in the young
2011
Revista española de orientación y psicopedagogía
2019
Título, resumen y palabras clave en español e inglés Resumen basado en el de la publicación El contexto socioeconómico obliga a realizar una revisión profunda del sentido del trabajo en la población. En momentos de escasez de oportunidades laborales y de redefinición del sentido y el significado del trabajo, muchas personas consideran la opción del autoempleo como alternativa al desempleo y la precariedad laboral. Sin embargo, informes oficiales muestran altas tasas de abandono de los proyectos empresariales en sus primeros años. Se analiza el papel que juega la orientación profesional en las fases iniciales del emprendimiento para favorecer una reflexión profunda sobre los motivos y las mo…
La emancipación compleja. Cambios en los procesos de independencia juvenil en España entre 1990 y 2020 en perspectiva comparada
2023
En esta obra se analizan los cambios en los modelos de emancipación juvenil en España en el período 1990-2020, centrándonos en la desestandarización del proceso, y la difusión de formas intermedias del mismo. La emancipación se concibe como la consecución de independencia respecto a la familia de origen, mediante un proceso complejo y multidimensional, determinado tanto por la agencia subjetiva como por la estructura social. Para el análisis empírico, se utiliza una aproximación multiestratégica: se combina un análisis comparativo de discursos de jóvenes noruegos y españoles, con un conjunto triangulado de análisis estadísticos sobre datos de encuesta transversales y longitudinales retrospe…