1,721,261 research outputs found
Educare nei contesti multiculturali
No full textAnalisi dei progetti interculturali svolti nelle scuole dell'infanzia della regione Emilia Romgana. I progetti presentati in questa monografia testimoniano come la riflessione pedagogica in ambito interculturale continui ad essere presenti nei servizi per la prima infanzia
NUCLEAR-DNA CONTENT IN GASTROTRICHA
No full textA cytofluorometric evaluation of nuclear DNA content was carried out on fifteen species of Gastrotricha. Genome size, ranging from 0.05 to 0.63 pg, appears uniform in this group and rather low compared to values found in other lower Metazoa. Differences in DNA content between the two orders of the phylum, Macrodasyida and Chaetonotida, which differ greatly in morphology and reproductive biology, are not evident. From these data, a polyploid condition of obligatory parthenogenetic Chaetonotida seems unlikely
La meiofauna: una risorsa per l'acquacoltura ed uno strumento per il controllo dell'ambiente
No full textVengono fornite informanioni rigurado la meiofuna e l'utilizzo dei diversi grupi nell'ambito del monitoraggio ambientale e quale possible alimento vivo nella itticoltur
Ultrastruttura degli spermatozoi ‘anomali’ di Chetonotidi partenogenetici (Gastrotricha, Chaetonotida).
No full textLife history traits of two chaetonotids (Gastrotricha) under different experimental conditions
No full textA marine and a freshwater species of Chaetonotida (Gastrotricha) were reared under laboratory conditions. Their life tables and principal demographic parameters were determined at 2 different temperatures (20"and 25'C). At 25'C the data relative to the marine species were collected from 5 cohorts kept at 5 different salinity levels (15, 25, 35, 45, 557..). A higher temperature increases reproductive activity while shortening its duration in both species, whereas the length of the lifespan remains unaffected.Extreme salinity values (15 and 55'/".) reduce the maximum longevityof the marine species and have opposite effects on reproductive activity,which is higher at low salinity and becomes lower at high salinity. Thepostparthenogenetic phase is remarkably long relative to the life cycle: thiswas observed in all experimental conditions and may be related to the existenceof a second reproductive phase, which is hermaphroditic and followsthe parthenogenetic one, as recently postulated from morphological data
Editorial: Clinical Psychometrics: Old Issues and New Perspectives
Full text linkClinical Psychometrics is defined as a discipline that deals with the definition and measurement of clinical constructs. It focuses on the theory of measurement, the construction and validation of psychological measures, and their application in the assessment of individual differences. Therefore, Clinical Psychometrics is an applied discipline, which uses psychometric tools in order to develop evidence-based procedures aimed at understanding and improving the psychological well-being of individuals.
Clinical Psychometrics can be considered as an essential tool in many fields of research related to psychological and psychiatric interventions: for example, it is useful for diagnostic assessment (in various fields, including clinical and forensic areas), and for the design and evaluation of specific psychological and pharmacological treatments. In the Research Topic “Clinical Psychometrics: Old Issues and New Perspectives,” we were interested in disseminating a culture of integration between the “psychometric model” and the “clinical model,” promoting a scientific debate around existing measures and methods, and proposing new methods capable of combining clinical significance with quantitative rigor (Balsamo et al., 2015a,b). Therefore, we brought together, within this research topic, contributions from researchers investigating factor invariance of new and existing instruments for measuring clinical variables; research studies developing more refined instruments for the evaluation of clinical dimensions; as well as research studies evaluating methodological issues involved in therapeutic outcomes and processes
Highly porous hollow 3D devices obtained by a combined melt-wet processing for long-term controlled release
Full text linkThe possibility to obtain resistant and reusable hollow devices with differentiated high porosity for storage and tunable long-term controlled release of substances is difficult to achieve efficiently. To solve this problem, we propose a combined melt-wet processing, which allows predictable and tunable morphologies. The process consists in combining Material Extrusion (MEX) with an eco-friendly salt leaching in distilled water, by using a biostable polymer and high percentages of saline porogen. Three blends with PA6/NaCl-30/70wt% composition were extruded, varying the salt particles size, that shows good dispersion in all the filaments, with a spontaneous tendency for bigger particles to accumulate in the central region of the cross-sections, attributable to fluid-dynamic reasons. Blends rheological and mechanical properties appeared suitable for the printing process. The hollow devices were then printed and successfully leached, resulting in homogeneously dispersed pores, with size ranges comparable to those of the porogen for each blend; therefore, the morphology of the pores can be directly predicted by the porogen and it was not altered during processing. Leaching occurred completely, in fact the real porosity for each device was consistent with the theoretical one. Despite the high percentage of voids, the hollow devices appeared to be mechanically resistant and therefore suitable for the application. Controlled release up to 11 days of a model molecule (methylene blue) was tested and predictable kinetics related to pore size were achieved so, therefore, they are easily tunable and versatile. Release data were fitted according to Peppas-Korsmeyer-model to describe the release mechanism related to porosity
Ermafroditismo in Lepidochaetus zelinkai (Gastrotricha, Chaetonotida): uno studio ultrastrutturale.
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