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A recent report showed PINK1 transcript levels to be up- or down-regulated by the gain or loss of Ataxin-2 function, respectively, in human blood, in a human neural cell line and in mouse tissues. These observations may have profound implications for the regulation of cell growth and may be medically exploited for the treatment of cancer and neural atrophy...
Kinder aus zugewanderten Familien und aus den unteren Sozialschichten haben es an deutschen Schulen schwer. Zu ihrer Unterstützung werden vielfältige Fördermaßnahmen angeboten. Welche Art der Förderung insbesondere Familien mit Migrationshintergrund benötigen, wird in der vorliegenden Schrift besprochen.
Zur Beantwortung dieser Frage wurde ein Familien-Bildungsprogramm - mittels qualitativer und quantitativer Erhebungsmethoden - evaluiert. In dem Programm werden Familien über die Dauer von zwei Jahren (im Übergang von der 4. in die 5. Klasse) eng begleitet. Das vielfältige Unterstützungsangebot ist dahingehend ausgerichtet, die teilnehmenden Kinder auf ihrem schulischen Weg zu unterstützen. Ebenso möchte das Programm zur Erhöhung der gesellschaftlichen Teilhabe der Familien beitragen.
Erhebliche Leistungsfortschritte erreichen fast alle Kinder im Kompetenzbereich Lesen. Besonders die leistungsschwächeren Kinder haben von der Förderung profitiert. Auch die Rechtschreibkompetenzen haben sich im Schnitt verbessert. Das schulbezogene Fähigkeitsselbstkonzept der Kinder sowie ihre Lern- und Leistungsmotivation bleibt von der Förderung relativ unbeeinflusst. Die Eltern profitieren insbesondere von dem Zugewinn einer konstanten Ansprechperson. Es gelingt den Mitarbeiterinnen ein Stützungs-Setting aufzubauen, welches den Eltern Sicherheit vermittelt und sie zuversichtlicher werden lässt. Daneben wurde eine Reihe differentieller Wirksamkeiten ermittelt (wie Entlastung, Aktivierung, Qualifizierung). Das Ausmaß der Wirksamkeit wird durch spezielle Bedingungen - auf Seite der Teilnehmer und auf Seite der Ausführenden - moderiert.
Die vorliegenden Ergebnisse werden mit Bezug auf Implikationen für die Praxis (in Schulen und Bildungsprogrammen) diskutiert.
In April and May 2012 data on Au+Au collisions at beam energies of Ekin = 1.23A GeV were collected with the High Acceptance Di-Electron Spectrometer (HADES) at the GSI Helmholtzzentrum für Schwerionenforschung facility in Darmstadt, Germany. In this thesis, the production of deuterons in this collision system is investigated.
A total number of 2.1 × 109 Au+Au events is selected, containing the most central 0-40% of events. After particle identification, based on a mass determination via time-of-flight and momentum and on a measurement of the energy loss, the transverse mass spectra of the deuteron candidates are extracted for various rapidities and subsequently corrected for acceptance and efficiency.
The inverse slope parameter of a Boltzmann fit applied to the transverse mass spectra at midrapidity, which is referred to as the effective temperature, is extracted. For a static thermal source, this parameter corresponds to the kinetic freeze-out temperature Tkin and is therefore expected to be smaller or equal to the chemical freeze-out temperature Tchem. The extracted effective temperature of Tef f = (190 ± 10) MeV however exceeds the chemical freeze-out temperature that was obtained by a statistical model fit to different particle yields. The effective temperatures of various particle species, obtained in previous analyses, suggest a systematic rise with increasing particle mass, which is confirmed by the deuteron results.
An explanation can be the influence of a collective expansion with a radial expansion velocity βr. By fitting a Siemens-Rasmussen function to the transverse mass spectra, the global temperature of T = (100 ± 8) MeV and radial expansion velocity βr = 0.37 ± 0.01 are obtained. This temperature is still very high and only takes into account the production of deuteron nuclei.
The simultaneous fit of a blast-wave function to the transverse mass spectra of deuterons and other particles, as obtained by previous analyses, considers a velocity profile for the radial expansion velocity and takes into account the production of various particle species. The resulting global temperature Tkin = (68 ± 1) MeV and average transverse expansion velocity hβri = 0.341 ± 0.003 are within the expected range for the collision energy.
The Siemens-Rasmussen fits are also used to extrapolate the transverse mass spectra into unmeasured regions, to integrate them and obtain a rapidity-dependent count rate. This count rate exhibits a thermal shape for central events and shows increasing spectator contributions for more peripheral events.
The invariant yield spectra of the deuterons are compared to those of protons, as obtained by a previous analysis, in the context of a nucleon coalescence model. The hereby extracted nucleon coalescence factor B2 = (4.6 ± 0.1) × 10−3 agrees with the expected result for the beam energy that was studied.
Theodor W. Adorno publicou o ensaio “Teoria da semiformação” (Theorie der Halbbildung) em 1959. A partir da publicação deste texto, observou-se sua relevância, sobretudo para que se pudesse compreender a maneira como a indústria cultural determinava a produção de prejuízos significativos no processo formativo. Desde então, a conquista do espírito feita pelo caráter fetichista dos produtos da indústria cultural, sendo esta uma das definições de Adorno sobre o conceito de Halbbildung, impulsionou a realização de muitas pesquisas sobre os danos decorrentes desta conquista na formação. Porém, investigar as atuais características do processo semiformativo não resulta na aplicação direta dos conceitos propostos por Adorno no final da década de 1950. Sendo assim, é preciso que tais conceitos sejam revitalizados por meio da análise das atuais mediações históricas. Seguindo essa linha de raciocínio, o principal objetivo deste artigo é argumentar que a reflexão crítica sobre o modo como a semiformação se renova, na atual sociedade da chamada cultura digital, torna-se fundamental para que se possam elaborar considerações sobre o renascimento da formação (Bildung).
Alzheimer’s disease (AD) is the most common form of dementia in the elderly; important risk factors are old age and inheritance of the apolipoprotein E4 (APOE4) allele. Changes in amyloid precursor protein (APP) binding, trafficking, and sorting may be important AD causative factors. Secretase-mediated APP cleavage produces neurotoxic amyloid-beta (Aβ) peptides, which form lethal deposits in the brain. In vivo and in vitro studies have implicated sortilin-related receptor (SORL1) as an important factor in APP trafficking and processing. Recent in vitro evidence has associated the APOE4 allele and alterations in the SORL1 pathway with AD development and progression. Here, we analyzed SORL1 expression in neural stem cells (NSCs) from AD patients carrying null, one, or two copies of the APOE4 allele. We show reduced SORL1 expression only in NSCs of a patient carrying two copies of APOE4 allele with increased Aβ/SORL1 localization along the degenerated neurites. Interestingly, SORL1 binding to APP was largely compromised; this could be almost completely reversed by γ-secretase (but not β-secretase) inhibitor treatment. These findings may yield new insights into the complex interplay of SORL1 and AD pathology and point to NSCs as a valuable tool to address unsolved AD-related questions in vitro.
In this paper we propose a sociological concept of innovation capable of transcending the limitations faced by the approaches of common theories of action. The concept was formulated by Ulrich Oevermann and is based upon Max Weber’s theory of charismatic authority. We apply this concept to archaeological data, using the example of Neolithic copper metallurgy in central Europe, and discuss the importance of analyzing innovations that failed to materialize even though they might have been "in the air" at the time. The concept sketched here enables the scientific study of such a phenomenon.