Cellular distribution and amount of chromogranin A in bovine endocrine pancreas

We determined the cellular distribution and the amount of chromogranin A in endocrine cells of bovine pancreas using a polyclonal antibody against bovine adrenomedullary chromogranin A. The relative amounts of chromogranin A in the different cells of the endocrine pancreas were determined by computer-assisted analyses of the optical densities of the immunoreactivities in the stained sections. More than 80% of the immunoreactive chromogranin A was located in the pancreatic B-cells. In immunoblots of acid tissue extracts, only one chromogranin A band (MW 74 KD) was observed. Quantification of the immunoblots revealed that 3 micrograms of chromogranin A and 918 micrograms of insulin were present per gram pancreas (wet weight), equivalent to a molar ratio of 460 mumol chromogranin A per mol insulin

Hadron Spectroscopy with COMPASS at CERN

The aim of the COMPASS hadron programme is to study the light-quark hadron spectrum, and in particular, to search for evidence of hybrids and glueballs. COMPASS is a fixed-target experiment at the CERN SPS and features a two-stage spectrometer with high momentum resolution, large acceptance, particle identification and calorimetry. A short pilot run in 2004 resulted in the observation of a spin-exotic state with $J^{PC} = 1^{-+}$ consistent with the debated $\pi1(1600)$. In addition, Coulomb production at low momentum transfer data provide a test of Chiral Perturbation Theory. During 2008 and 2009, a world leading data set was collected with hadron beam which is currently being analysed. The large statistics allows for a thorough decomposition of the data into partial waves. The COMPASS hadron data span over a broad range of channels and shed light on several different aspects of QCD.Comment: 4 pages, 5 figure

Geographic Variation of Cirques on Iceland: Factors Influencing Cirque Morphology

Cirques are one of the most common glacial landforms in alpine settings. They also provide important paleoclimate information (e.g. Meierding 1984; Evans 2006). The purpose of this study is to fill in gaps in the climate record of Iceland by conducting a quantitative analysis of cirques in three regions in Iceland: Tröllaskagi, the East Fjords, and Vestfirðir. Iceland, located in the center of the North Atlantic Ocean, contains many small glaciers, in addition to large ice caps. The glaciers on Iceland are particularly sensitive to variations in oceanic and atmospheric circulation (Andresen et al. 2005; Geirsdóttir et al., 2009; Ólafsdóttir et al. 2010). Iceland thus provides an excellent case study to examine factors influencing glacial landforms such as cirques. (excerpt

Fermi Surface of KFe2_2As2_2 from Quantum Oscillations in Magnetostriction

We present a study of the Fermi surface of KFe$_2$As$_2$ single crystals. Quantum oscillations were observed in magnetostriction measured down to 50 mK and in magnetic fields $H$ up to 14 T. For $H \parallel c$, the calculated effective masses are in agreement with recent de Haas-van Alphen and ARPES experiments, showing enhanced values with respect to the ones obtained from previous band calculations. For $H \parallel a$, we observed a small orbit at a cyclotron frequency of 64 T, characterized by an effective mass of $\sim 0.8 m_e$, supporting the presence of a three-dimensional pocket at the Z-point.Comment: SCES Conference, Tokyo 201

Barriers and Facilitators to Enhance Interprofessional Education for Rehabilitation Science Graduate Students

Interprofessional education (IPE) aims to develop healthcare practitioners who work effectively in teams, demonstrate strong communication skills, respect others, and have a working knowledge of the roles and responsibilities of other professionals. Of identified research to date, it is unclear what students perceive as important for effective IPE delivery and learning. The purpose of this study was to identify graduate students\u27 perceptions of facilitators and barriers to learning interprofessional practice using phenomenology. Three semi-structured focus groups were conducted including athletic training, occupational therapy, or speech-language pathology students and the transcripts were analyzed using thematic analysis. Four themes emerged about IPE teaching methods and delivery: (1) addressing roles and responsibilities (2) student collaboration and communication (3) engaging with faculty and (4) enhancing realism and diversity of experiences. The themes suggested that IPE can either facilitate or create barriers for students when learning roles and responsibilities, collaborating, and communicating with fellow students, and engaging with faculty. Enhancing the realism and diversity of represented professionals were perceived as potential facilitators for future IPE sessions

Observation of Buried Phosphorus Dopants near Clean Si(100)-(2x1) with Scanning Tunneling Microscopy

We have used scanning tunneling microscopy to identify individual phosphorus dopant atoms near the clean silicon (100)-(2x1) reconstructed surface. The charge-induced band bending signature associated with the dopants shows up as an enhancement in both filled and empty states and is consistent with the appearance of n-type dopants on compound semiconductor surfaces and passivated Si(100)-(2x1). We observe dopants at different depths and see a strong dependence of the signature on the magnitude of the sample voltage. Our results suggest that, on this clean surface, the antibonding surface state band acts as an extension of the bulk conduction band into the gap. The positively charged dimer vacancies that have been observed previously appear as depressions in the filled states, as opposed to enhancements, because they disrupt these surface bands.Comment: 4 pages, 3 figures. TeX for OSX from Wierde

Baseball Card Pricing Model: A Demonstration with Well-known Players

A simple hedonic pricing model is developed for baseball cards, of the type often used successfully to model prices for artworks. The model is estimated for a dataset of twelve well-known players observed at eight points in time over a span of twenty years. Dummy variables are used to capture various relevant characteristics of the player or card. This model was estimated separately for two different approaches or assumptions about rates of return. Estimates perform extremely well, explaining most differences among baseball card prices for the cards in the sample. Among extrinsic variables that represent specific players and card characteristics that differentiate cards issued during the same season, race had a significant positive effect on price for black players. Batting average and number of World Series appearances had significant positive impacts on price, but surprisingly, rookie cards tended to be worth relatively less than non-rookie cards. Similarly unexpected findings with respect to players\u27 death and elevation to the Hall of Fame may result from trying to estimate too many characteristics simultaneously on a limited dataset. Results suggest famous players\u27 cards generally are extremely attractive investment instruments

Alterseffekte auf die Bedeutung berufsbezogener Motive und die Zielorientierung

Kenntnisse über altersabhängige Veränderungen der Arbeitsmotivation und der Zielorientierung sind entscheidend, um ältere Berufstätige als wichtige Leistungsträger in Arbeitsorganisationen zu halten. In der vorliegenden Dissertation wurden dazu drei Studien durchgeführt: (1) Es wurde ein reliables und valides Instruments zur Erfassung berufsbezogener Motive jüngerer und älterer Berufstätiger entwickelt. (2) Die Untersuchung von Alterseffekten auf die Bedeutung der berufsbezogenen Motive zeigte u. a., dass älteren Berufstätigen Generativitätsmotive und jüngeren Berufstätigen extrinsische Wachstumsmotive wichtiger sind. (3) Die Untersuchung von Alterseffekten auf die Zielorientierung (Optimierung, Kompensation) zeigte, dass ältere Berufstätige mehr „Kompensation“ berichteten. Ältere Berufstätige berichteten zudem mehr „Optimierung“ bei Generativitätsmotiven. Die Ergebnisse werden mit Hinweisen auf zukünftige Forschung und in Bezug auf praktische Implikationen diskutiert