BACKGROUND The Birch reduction of electron rich pyrroles does not occur readily. However, dissolving metal reduction with zinc under acidic conditions gives 3-pyrrolines (2,5-dihydropyrroles) in reasonable yield. This dissolving metal reduction was first reported by Knorr and Rabe in 1901 but since then has only been reported for the reduction of electron rich pyrroles. RESULTS The partial re...

Heike Wegmeyer,1 Joaquim Egea,2 Nadine Rabe,4 Henrik Gezelius,4 Alessandro Filosa,2,3 Anders Enjin,4 Frederique Varoqueaux,1 Katrin Deininger,2 Frank Schnütgen,5 Nils Brose,1 Rüdiger Klein,2 Klas Kullander,4 and Andrea Betz1,* 1Department of Molecular Neurobiology and DFG Center for Molecular Physiology of the Brain, Max Planck Institute of Experimental Medicine, D-37075 Göttingen, Germany 2Dep...

Nature has long inspired scientists with its seemingly unlimited ability to harness solar energy and to utilize it to drive various physiological processes. With the help of man-made molecular photoswitches, we now have the potential to outperform natural systems in many ways, with the ultimate goal of fabricating multifunctional materials that operate at different light wavelengths. An importa...

U kemiji i nastavi kemije rabe se veličine pikometar Avogadrov broj. Nastavnici lakoćom izgovore ili napišu, a učenici napamet nauče reproduciraju te veličine, bez predodžbe o tomu koliko je 10−12 1023. ovom radu pokazano kako vlastitom aktivnošću, u slučaju rješavanjem jednostavnih problemskih zadataka iz područja strukturne kemije, mogu samostalno doći do spoznaja veličini atoma usporediti ih...

Kamnarski terminološki slovar je prvi slovenski s področja kamnarstva. Obsega pridobivanja, obdelave, vgradnje in nege naravnega kamna, vključuje pa tudi raziskovanje, načrtovanje, oblikovanje umetniško ustvarjanje v naravnem kamnu ter restavratorske konservatorske posege na kamniti, zlasti arhitekturni dediščini. Vsebuje 1516 terminov, ki imajo definicijo ali uporabnika slovarja usmerjajo k pr...

The isolation and crystallization of a product obtained by the in vitro action of rabbit liver on quinine (I) have recently been described by Kelsey, Geiling, Oldham, and Dearborn (1). The work reported here was undertaken with the object of obtaining information, as rapidly as possible, as to the possible structure of this product, which might prove useful in other malarial investigations. Thu...

Dirkje S. Postma, Chris Brightling, Leo Fabbri, Thys van der Molen, Gabriele Nicolini, Alberto Papi, Klaus F. Rabe, Salman Siddiqui, Dave Singh, Maarten van den Berge and Monica Kraft Affiliations: University of Groningen, University Medical Center Groningen, Dept of Pulmonology, Groningen, The Netherlands. Dept of Infection, Immunity and Inflammation, Institute for Lung Health, University of L...

In the past 2 decades latent variable modeling has become a standard tool in the social sciences. In the same time period, traditional linear structural equation models have been extended to include non-linear interaction and quadratic effects (e.g., Klein and Moosbrugger, 2000), and multilevel modeling (Rabe-Hesketh et al., 2004). We present a general non-linear multilevel structural equation ...

'The diagnosis of primary atypical pneumonia at the present time is in reality a process of excluding the known specific diseases which may present the same clinical syndrome.' This comment of Dingle's made in 1947 is presumably still true. In infants and children suffering from pneumonia sputum is rarely obtainable, and as Rabe (1948) stated 'the mere presence of a potential pathogen in the rh...