Search results for "PET"

Un nuevo caso de albinismo en Pelobates cultripes

1994

El albinismo en Pelobates cultripes ha sido recientemente descrito por BOSCH (1991) sin que existan citas anteriores o nuevos hallazgos hasta la fecha.

Miesten juttuja : ammatti-identiteetti miesopettajien kertomana

2015

TIIVISTELMÄ Niskavaara, J. 2015. Miesten juttuja. Ammatti-identiteetti miesopettajien kertomana. Kasvatustieteen pro gradu-tutkielma. Jyväskylän yliopisto. Opettajankoulutuslaitos. Tutkimuksessa tarkastellaan miesopettajan ammatti-identiteettiä, sen olennaisimpia piirteitä ja ammatti-identiteetin muutosta työuran edetessä. Ammatti-identiteetin muuttumiseen vaikuttavat oleellisesti asiantuntijuuden kehittyminen ja tällä hetkellä ajankohtaiset kouluorganisaatioiden kehittämispyrkimykset. Koska tutkimusjoukko koostuu pelkästään miehistä, on tutkimuksessa käsitelty opettajuutta myös sukupuolinäkökulmasta. Tutkimus perustuu miesopettajien omiin kertomuksiin kokemuksistaan työssään ja heidän kert…

Keyhole limpet haemocyanin: negative staining in the presence of trehalose

1995

Abstract Samples of unpurified and purified haemocyanin from the giant keyhole limpet Megathura crenulata have been studied by transmission electron microscopy (TEM) using mixtures of trehalose with the negative stains, uranyl acetate and ammonium molybdate. Trehalose is a known protein preservative during air and freeze drying, UV irradiation and high temperatures, and therefore offers the possibility of protecting proteins during the drying of negatively-stained specimens and their subsequent electron microscopical study. Evidence is presented that trehalose possesses satisfactory stability within the electron beam during conventional room temperature, negative-staining studies. The combi…

Neoproterozoic Rosetta Gabbro from northernmost Arabian–Nubian Shield, south Jordan : Geochemistry and petrogenesis

2017

An Ediacaran mafic intrusion of south Jordan is a distinctive appinitic igneous rock with a possibly unique texture, characterized by spherical clots up to 40 mm in diameter composed of amphibole cores from which plagioclase euhedra radiate; we call it the Rosetta Gabbro. It is exposed as a small (ca. 750 m(2)) outcrop in the Neoproterozoic basement of south Jordan. A second outcrop of otherwise similar gabbro is located about 400 m to the north of the Rosetta Gabbro, but it lacks the distinctive texture. The Rosetta Gabbro could represent a magma pipe. It intrudes the Aqaba Complex (similar to 600 Ma) granitoids and metasediments of the Janub Metamorphic Complex (633-617 Ma). The gabbro is…

Amurin koulun vieraskielisen opetuksen eri vaiheet

2011

Artikkeli käsittelee Amurin koulun vieraskielistä opetusta ja sen kehityskaarta kirjoittajan kokemusten valossa. Sinikka Lampinen on työskennellyt Amurin koulussa 20 vuotta, joista 7 vararehtorina. Kirjoituksessa on käytetty lähteinä Tampereen kaupungissa julkaistuja artikkeleita ja Amurin koulun 50 v. juhlakirjaa. nonPeerReviewed

Synthesis and evaluation of 18F-fluoroethylated benzothiazole derivatives for in vivo imaging of amyloid plaques in Alzheimer's disease

2010

Amyloid aggregates play a major role in the development of Alzheimer's disease. Targeting these aggregates by PET probes enables non-invasively the detection and quantification of amyloid deposit distribution in human brains. Based on benzothiazole core structure a series of amyloid imaging agents were developed. Currently [(11)C]2-(4'-(methylamino)phenyl)-6-hydroxybenzothiazole (Pittsburgh Compound-B (PIB) is the most specific and widely used amyloid imaging ligand. But due to the short half life of (11)C, longer lived (18)F-labeled derivatives offer logistic advantages and higher contrast images. In this work, three different [(18)F]fluoroethoxy-substituted benzothiazole derivatives ([(18…

Contribución de Anales de Pediatría a la visibilidad internacional de la investigación pediátrica española en la Web of Science (2010-2014)

2016

Resumen: Objetivo: Describir el papel de Anales de Pediatría en la difusión de la investigación pediátrica española e identificar las revistas con las que compite internacionalmente. Material y método: Se identificó la producción pediátrica española y la de Anales de Pediatría recogida en la categoría Pediatrics del Science Citation Index de la WoS (2010-2014) analizando su volumen y tipo documental. De los artículos originales y revisiones (artículos) se estudiaron el año, la citación y el tipo de revista de publicación (revistas generales y especializadas). De las generales, se analizó su productividad de acuerdo con su idioma, posición que ocupa en los JCR de 2012 y accesibilidad a sus c…

Monitoring of the decorative ornaments of the roman villa del casale at Piazza Armerina (Enna)

2008

Developmental trends in children's pretend play.

1991

The developmental trends in pretend play were investigated in children 2-6 years of age (18 in each of five age groups) by examining changes in pretend action and speech separately. Play behaviour was assessed by using a selected set of Duplo Lego toys. Interest focused on occurrence of decentration, decontextualization and integration at different age levels. The proportions of decentred and decontextualized acts, action integrations and play themes, increased linearly with age. Changes in substitutive and inventive actions were, however, more minor than expected. Single-scheme combinations did not reveal any essential aspect of the development of children's symbolic competence. In this se…

Relatedness affects competitive performance of a parasitic plant (Cuscuta europaea) in multiple infections.

2004

Theoretical models predict that parasite relatedness affects the outcome of competition between parasites, and the evolution of parasite virulence. We examined whether parasite relatedness affects competition between parasitic plants (Cuscuta europaea) that share common host plants (Urtica dioica). We infected hosts with two parasitic plants that were either half-siblings or nonrelated. Relative size asymmetry between the competing parasites was significantly higher in the nonrelated infections compared to infections with siblings. This higher asymmetry was caused by the fact that the performance of some parasite genotypes decreased and that of others increased when grown in multiple infect…