Modificación reglamentaria en baloncesto: descripción del juego colectivo de ataque en categoría infantil

The aim of this study was to describe the characteristics of attack collective game of the boys 13-and-under competition. The variables studied were number of attack phases, type of each attack phase, duration of each attack phase, number of passes of each attack phase and number of players of each attack phase. The study sample comprised 1878 attack phases from the all six teams which played the boys 13-and-under regular competition for the season 2011/2012 in Granada (Spain), 72 players (age: M=12.56 years, SD=0.54) participated. This research did by means of observational methodology. The findings of the present study show an improvement in competition, adapting to the characteristics and needs of young players. Some aspects could be improved if it change further some of the values obtained in the variables analyzed.El objetivo del presente estudio fue describir las características del juego colectivo de ataque en categoría infantil masculina respecto al número de fases de ataque, duración de la fase de ataque, tipo de fase de ataque, número de pases por fase de ataque y número de jugadores que participan en cada por fase, tras realizar una serie de modificaciones reglamentarias: reducción del número de jugadores y tamaño del balón y de la distancia de la línea de tiro libre y triple con respecto al aro. La muestra estuvo compuesta por 1878 fases de ataque realizadas por los seis equipos que participaron en la competición regular de la categoría infantil masculina durante la temporada 2011/2012 en la provincia de Granada (España), participando un total de 72 jugadores (edad: M=12.56 años, SD=0.54). El estudio se realizó mediante metodología observacional. Los datos muestran una mejora en la competición, adecuándola a las características y necesidades de los jóvenes jugadores. Algunos aspectos son susceptibles de mejora si se modificasen aún más algunos de los valores obtenidos en las variables analizadas

Protection and consolidation of stone heritage by self-inoculation with indigenous carbonatogenic bacterial communities

Enhanced salt weathering resulting from global warming and increasing environmental pollution is endangering the survival of stone monuments and artworks. To mitigate the effects of these deleterious processes, numerous conservation treatments have been applied that, however, show limited efficacy. Here we present a novel, environmentally friendly, bacterial self-inoculation approach for the conservation of stone, based on the isolation of an indigenous community of carbonatogenic bacteria from salt damaged stone, followed by their culture and re-application back onto the same stone. This method results in an effective consolidation and protection due to the formation of an abundant and exceptionally strong hybrid cement consisting of nanostructured bacterial CaCO3 and bacterially derived organics, and the passivating effect of bacterial exopolymeric substances (EPS) covering the substrate. The fact that the isolated and identified bacterial community is common to many stone artworks may enable worldwide application of this novel conservation methodology.This work was supported by the Spanish Government (Grants MAT2012-37584, CGL2012-35992 and CGL2015-70642-R), the Junta de Andalucía through Proyecto de excelencia RNM-3493 and Project P11-RNM-7550, the Research Groups BIO 103 and RNM-179, and the University of Granada (Unidad Científica de Excelencia UCE-PP2016-05). Additional funds were provided by the Molecular Foundry (Lawrence Berkeley National Laboratory, LBNL, University of California, Berkeley, CA) for a research stay of M.S. (project #1451; User Agreement No. NPUSR009206)

Hydroxychloroquine treatment does not reduce COVID-19 mortality; underdosing to the wrong patients?

CORRESPONDENC

Evolution

Issue 1