Browsing by Sponsor "Deutsche Forschungsgemeinschaft (DFG)"
Now showing items 1-20 of 21
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7-Nitro-5,10,15,20-tetraphenylporphyrin Dichloromethane Solvate
(International Union of Crystallography, 1998)The title compound shows significant conformational distortion in the vicinity of the [beta]-nitro group. This is attributed to steric interaction between a meso-phenyl and the [beta]-nitro group. The overall degree of ... -
Axial Coordination Phenomena in Highly Substituted Porphyrins. Crystal Structure of the Polymeric (2,3,7,8,12,13,17,18-Octaethyl-5,10,15,20-tetranitroporphyrinato)zinc(II), [{Zn(oetnp)}n]
(Royal Society of Chemistry, 1994)The polymeric structure of the sterically strained and non-planar porphyrin [{ZnIIoetnp}n] is determined by X-ray crystallography; polymerization is achieved by utilization of the nitro-groups for axial ligation to the ... -
Bis(methanol-O)(2,3,7,8,12,13,17,18-octaethylporphyrinato-N,N',N",N'")-iron(III) Perchlorate Bis(methanol) Solvate, [Fe(III)oep(HOCH3)2][ClO4].2CH3OH
(International Union of Crystallography, 1996)Simple treatment of [FeIII(oep)Cl] (where oep is octaethylporphyrin) with dilute perchloric acid leads to facile preparation of the title compound, [Fe(C36H44N4)(CH4O)2](ClO4).2CH4O. The structure consists of discrete ... -
Bis[anhydro-meso-rhodochlorinato XV methyl ester)zinc(II)]
(International Union of Crystallography, 1997)The title compound bis[(methyl 8,13-diethyl-2,21,22,23-tetrahydro- 3,7,12,17-tetramethyl-23-oxo-3H-benzo[at]porphyrin-18-carboxylato-Kappa4N)- zinc(II)], [Zn(C33H34N4O3)]2, has similar structural characteristics to the ... -
Cone opsin mislocalization in Rpe65-/- mice: A defect that can be corrected by 11-cis retinal
(The Association for Research in Vision and Ophthalmology, Inc., 2005)PURPOSE: In retinal degenerative diseases, rod photoreceptors typically deteriorate more rapidly than cone photoreceptors. In the Rpe65(-/-) mouse, a model for Leber's congenital amaurosis, cones degenerate much more rapidly ... -
Continuous wafer-scale graphene on cubic-SiC(001
(2013)The atomic and electronic structure of graphene synthesized on commercially available cubic-SiC(001)/Si(001) wafers have been studied by low energy electron microscopy (LEEM), scanning tunneling microscopy (STM), low energy ... -
Crystal Structure of a Remarkably Ruffled Nonplanar Porphyrin - (Pyridine)(5,10,15,20-Tetra(tert-butyl)porphyrinato)zinc(II)
(Royal Society of Chemistry, 1995)The title compound presents the first example of a sterically ruffled porphyrin bearing only meso substituents; the degree of ruffling is severe, with Cm-displacements of up to 1 ?. -
How Political Careers affect Prime-Ministerial Performance: Evidence from Central and Eastern Europe
(2021)Even though Prime Ministers (PMs) are the central actors in parliamentary democracies, little comparative research explores what makes them perform successfully in office. This article investigates how the political careers ... -
Loss of viral fitness and cross-recognition by CD8+ T cells limit HCV escape from a protective HLA-B27-restricted human immune response
(American Society for Clinical Investigation, 2009)There is an association between expression of the MHC class I molecule HLA-B27 and protection following human infection with either HIV or HCV. In both cases, protection has been linked to HLA-B27 presentation of a single ... -
Morphological characterization of the retina of the CNGA3(-/-)Rho(-/-) mutant mouse lacking functional cones and rods
(Association for Research in Vision and Ophthalmology, 2004)PURPOSE. To assess the structural changes in the retina caused by a functional blockade of rods and cones and to document the time course of their degeneration. METHODS. Double knockout mice were generated by cross-breeding ... -
Multimodal Analysis for Brain Network Fingerprints in Parkinson's Disease Patients
(Trinity College Dublin. School of Medicine. Discipline of Clinical Medicine, 2023)Parkinson's disease is a neurodegenerative disorder that causes structural and functional abnormalities in the central nervous system. The disease leads to the development of cardinal motor symptoms, including bradykinesia, ... -
A Novel 2,18-Bridged Biliverdin Derivative
(Royal Society of Chemistry, 1993)Base-catalysed dehydrohalogenation of a 3,18-bis(2-chloroethyl)biliverdin 1 affords a novel 3-vinylbiliverdin 3 in which the 2- and 18-positions are bridged with a propano-tether; the structure of 3 has been established ... -
Silicon and chromium stable isotopic systematics during basalt weathering and lateritisation: A comparison of variably weathered basalt profiles in the Deccan Traps, India
(2018)Global biomass production is fundamentally affected by the hydrological cycling of elements at the Earth’s surface. Continental weathering processes are the major source for most bio-essential elements in marine environments ... -
Smart polymer surfaces: mapping chemical landscapes on the nanometre scale
(Royal Society of Chemistry, 2010)We show that Scattering Infrared Near-field Microscopy (SNIM) allows chemical mapping of polymer monolayers that can serve as designed nanostructured surfaces with specific surface chemistry properties on a nm scale. ... -
Structural Evidence for Nonplanar Keto- and Planar Enol-Forms of Oxophlorins
(Royal Society of Chemistry, 1992)The first structural investigation of a zinc(II) and a free-base oxophlorin reveals considerable conformational differences between the keto-(1) and enol-form (2) of oxophlorins. -
Structure and Conformation of Photosynthetic Pigments and Related Compounds. 10. Comparison of a Phytochlorin and Phytoporphyrin Derived from Chlorophyll a
(International Union of Crystallography, 1997)The crystal and molecular structures of 17-decarboxyethyl-131-deoxo-17-propylphytochlorin, C33H40N4, (1), and phytoporphyrin methyl ester, C34H36N4O3, (2), are compared. Compound (1) shows structural parameters similar to ... -
Structure and Conformation of Photosynthetic Pigments and Related Compounds. 11. 5,10,15,20-Tetrabutylbacteriochlorin
(International Union of Crystallography, 1998)The structure of the title compound, C36H50N4, is the first example of a tetra-meso-substituted free-base bacteriochlorin (2,3,12,13-tetrahydroporphyrin). While general structural characteristics are similar to other ... -
Synaptic plasticity in GNGA3-/- mice: Cone bipolar cells react up0onthe missing cone input and form ectopic synapses with rods
(The Society for Neuroscience, 2006)In the mammalian retina, rods and cones connect to distinct sets of bipolar cells. Rods are presynaptic to a single type of rod bipolar cell, whereas cones connect to different types of cone bipolar cells. Synaptic rewiring ... -
Synthesis and crystal structures of cofacial bischlorins - Octaethylchlorin-based structural models for the special pair in photosynthesis
(Royal Society of Chemistry, 1996)McMurry coupling of metalloformyloctaethylchlorins yields the first cofacial bischlorin with structural characteristics mimicking those of the special pair in photosynthesis.