TY  - JOUR
A1  - Zhang, X. F.
A1  - Becker, Charles R.
A1  - Zhang, H.
A1  - He, L.
A1  - Landwehr, G.
T1  - Investigation of a short period (001) HgTe-Hg\(_{0.6}\)Cd\(_{0.4}\)Te  superlattice by transmission electron microscopy
N2  - No abstract available
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-38029
ER  - 
TY  - JOUR
A1  - Yong, Liu
A1  - Jacobowitz, David M.
A1  - Barone, Frank
A1  - McCarron, Richard
A1  - Spatz, Maria
A1  - Feuerstein, Giora
A1  - Hallenbeck, John M.
A1  - Sirén, Anna-Leena
T1  - Quantitation of perivascular monocyte / macrophages around cerebral blood vessels of hypertensive and aged rats
N2  - The numbers of monocytes and macrophages in the walls of cerebral blood vessels were counted on perfusion-fixed frozen brain sections (16 JLffi) of spontaneously hypertensive rats (SHR), stroke-prone SHR (SHR-SP), normotensive Wistar-Kyoto (WKY) rats, and young (16-week-old) and old (2-year-old) normotensive Sprague-Dawley rats (SD-l6w and SD-2y, respectively) using monoclonal antiborlies against rat macrophages (ED2). The staining was visualized with fluoresceinlabeled second antiborlies. The ED2-specific staining in brain sections was restricted to macrophages in a perivascular location. The number of perivascular cells per square millimeter of high-power field was significantly greater in SHR-SP (8.6 ± 2.1; n = 4) and SHR (6. 7 ± 0.9; n = 6) than in normotensive WKY (4.0 ± 0.5; n = 6; p <0.01). The number of perivascular macrophages was also greater in SD-2y (7.5 ± 2.7; n = 9) than in SD-l6w (2.9 ± 1.8; n = 8; p < 0.01). No ED2 staining was found in the resident microglia or in the endothelial cells, which were identified by double staining with rhodamine-labeled anti-factor VIII-related antigen antiborlies. The results suggest that the stroke risk factors hypertension and advanced age are associated with increased subendothelial accumulation of monocytes and macrophages. This accumulation could increase the tendency for the endothelium to convert from an anticoagulant to a procoagulant surface in response to mediators released from these subendothelial cells.
KW  - Willebrand-Faktor
KW  - immunofluorescence
KW  - ED2
KW  - Von Willebrand factor
KW  - rats
KW  - brain
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86800
ER  - 
TY  - JOUR
A1  - Xu, Shanjia
A1  - Sheng, Xinqing
A1  - Greiner, P.
A1  - Becker, Charles R.
A1  - Geick, R.
T1  - High-order finite-element analysis of scattering properties of II-VI semiconductor materials
N2  - The sattering characteristics ot the n-VI semiconductors were analyzed by a method which combines the second-order finite-element method with the rigorous mode matching procedure. The method avolds the difficulty of solving the complex transcendental equation introduced in the multimode network method and calculates all the eigenvalues and eigenfunctions simultaneously which are needed for the mode matching treatment in the longitudinal direction. As a result, the whole solution procedure is significantly simplified. A comparison is given between the experimental data and the calculated results obtained with this analysis and tbe network method. Very good agreement has been achieved, the accuracy and efficiency of the present method are thus verified.
KW  - Halbleiter
KW  - II-VI semiconductor
KW  - scattering characteristics
KW  - high-order finite element
KW  - mode matching method
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86283
ER  - 
TY  - JOUR
A1  - Wortmann-Saleh, D.
A1  - Engels, Bernd
A1  - Peyerimhoff, S. D.
T1  - Theoretical Study of the Reaction O(\(^3\)P) + C\(_2\)H\(_4\) and comparison with the \(^3\)CH\(_3\) + C\(_2\)H\(_4\) Reaction
N2  - The minimum energy path for the reaction O(\(^3\)P\(_g\)) + C\(_2\)H\(_4\)(\(^1\)A\(_g\)) has been calculated by optimizing all relevant geometrical parameters along the approach of oxygen to ethene. A barrier of 4.7 kcal/mol in the \(^3\)A"( ... 9a'\(^2\)- 10a'3a") potential energy surface and an energy difference of 14.4 kcal/mol between the product and the fragments is found at the multireference-configuration interaction level. The corresponding values at the lower-level treatment CASSCF are 9 kcal/mol for the barrier and 9 kcal/mol for the depth of the potential; this shows the importance of inclusion of electron correlation. The barrier for CH\(_2\) rotation for the lowestenergy structure (asymmetric OC\(_2\)H\(_4\)) is around 5 kcal/mol. The energy gap to the first excited state \(^3\)A'( ... 9a'l0a'3a'12) is found tobe 3.6 kcal/mol in MRD-CI calculations at the ground-state minimum. Comparison with \(^3\)CH\(_2\) + C\(_2\)H\(_4\) shows that in this system the lowest-energy surface is \(^3\)A', i.e., the state which is the excited state in 0 + C\(_2\)H\(_4\). This difference in energy ordering of \(^3\)A' and \(^3\)A" states results from the fact that the p\(_x\), p\(_y\), p\(_z\) degeneracy of oxygen orbitals is lifted in \(^3\)CH\(_2\)leading to b\(_1\), b\(_2\). and a\(_1\) MOs whereby the lowest b\(_2\) (a") remains doubly occupied; as a consequence, the reaction pattem between the oxygen and \(^3\)CH\(_2\) approach is different, which is also quite apparent in the calculated charge transfer.
KW  - Organische Chemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59076
ER  - 
TY  - JOUR
A1  - Wissing, Elmo
A1  - Kaupp, Martin
A1  - Boersma, Jaap
A1  - Spek, Anthony L.
A1  - Koten, Gerard van
T1  - Alkylation Reactions of Dialkylzinc Compounds with 1,4- Diaza- 1,3-butadienes: Cationic and radical Anionic Organozinc Intermediates. Molecular Structure of the Cationic Organozinc Species [MeZn(t-BuN=CHCH=N-t-Bu)]O\(_3\)SCF\(_3\) and Me\(_2\)Zn(bpy)(bpy = 2,2' -Bipyridine)
N2  - No abstract available
KW  - Anorganische Chemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-60008
ER  - 
TY  - JOUR
A1  - Winoto-Morbach, S.
A1  - Krout, OS
A1  - Heiser, A.
A1  - Ulrichs, Karin
A1  - Müller-Ruchholtz, W.
T1  - Lectin binding to acinar tissue for complete magnetophoretic purification of porcine pancreatic islets depends on the composition and pH of the incubation medium
N2  - No abstract available
KW  - Chirurgie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-45183
ER  - 
TY  - JOUR
A1  - Winkler, Christoph
A1  - Wittbrodt, Joachim
A1  - Lammers, Reiner
A1  - Ullrich, Axel
A1  - Schartl, Manfred
T1  - Ligand-dependent tumor induction in medakafish embryos by a Xmrk receptor tyrosine kinase transgene
N2  - Xmrk encodes a subclass 1 receptor tyrosine kinase (RTK) which has been cloned from the melanomainducing locus Tu of the poeciliid fish Xiphophorus. To demonstrate a high oncogenic potential in vivo we transferred the gene into early embryos of the closely related medakafish. Ectopic expression of the Xmrk oncogene under the control of a strong, constitutive promoter (CMVTk) led to the induction of embryonic tumors with high incidence, after short latency periods, and with a specific pattern of affected tissues. We demonstrate ligand-dependent transformation in vivo using a chimeric receptor consisting of the extracellular and transmembrane domains of the human EGF receptor (HER) and the cytoplasmatic domain of Xmrk. Expression of the chimeric receptor alone does not lead to ldnase activation or induction of tumors. Coexpression of the chimera with its corresponding ligand, human transforming growth factor alpha (bTGF(X), however, results in the activation of the chimeric RTK. In injected fish embryos the induction of the neoplastic growth is observed with similar incidence and tissue distribution as in embryos carrying the native Xmrk oncogene suggesting that the ligand as well as factors downstream of tbe RTK are required for tumor formation. In this study we show single-step induction of tumors by ectopic expression of RTKs in vivo substantiating tbe significance of autocrine stimulation in RTK induced tumors in vertebrales.
KW  - Japankärpfling
KW  - Ligand <Biochemie>
KW  - Tumor
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87107
ER  - 
TY  - JOUR
A1  - Wimmer, Heinz
A1  - Landerl, Karin
A1  - Schneider, Wolfgang
T1  - The role of rhyme awareness in learning to read a regular orthography
N2  - The present research examined whether children's awareness of phonological similarities between words with respect to rhyme and consonantal word onset is of the same importance for learning to read German as it was found to be for learning to read English. In two longitudinal studies differences in phonological sensitivity among children before learning to read (at age 6 to 7) were tested with versions of Bradley & Bryant's (1985) oddity detection task. Children's reading and spelling achievements were tested about one year later at the end of grade one, and again at around the age of 10. The main finding was a developmental change in the predictive relationship of rhyme and word-onset awareness. Rhyme awareness was only minimally predictive for reading and spelling achievement at the end of grade one, but gained substantially in predictive importance for reading and spelling achievement in grades three and four. No such predictive improvement was observed for word-onset awareness. It is proposed that rhyme awareness is initially of little importance, because in the first phase of learning to read German children rely heavily on indirect word recognition via grapheme--phoneme translation and blending. The gain in the predictive importance of rhyme awareness is explained by its helpful effect on the establishment of mental representations of written words. Such mental representations allow fast, direct word recognition and orthographically correct spellings. A wareness of larger phonological units is helpful for the efficient establishment of such representations, by allowing connections of recurring grapheme clusters in written words with phonology.
KW  - Psychologie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-50508
ER  - 
TY  - JOUR
A1  - Wilhelm, Gernot
T1  - Kumme und *Kumar: Zur hurritischen Ortsnamenbildung
N2  - no Abstract available
KW  - Churritisch
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86448
ER  - 
TY  - JOUR
A1  - Wilhelm, Gernot
T1  - Bemerkungen zur urartäischen Paläographie
N2  - no Abstract available
KW  - Alter Orient
KW  - Kultur
KW  - Geschichte
KW  - Aufsatzsammlung
KW  - Hrouda
KW  - Barthel
KW  - Bibliographie
KW  - Funde
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87784
ER  - 
TY  - JOUR
A1  - Wieber, Markus
A1  - Lang, Stefan
A1  - Rohse, Stefan
A1  - Habersack, Ralph
A1  - Burschka, Christian
T1  - Synthese und Kristallstruktur von Triphenyltelluroniumsulfid
T1  - Synthesis and Crystal Structure of Triphenyltelluroniumsulfide
N2  - No abstract available
KW  - Chemie
KW  - Triphenyltelluroniumsulfide
KW  - Synthesis
KW  - NMR Data
KW  - Crystal Structure
KW  - Secondary Bonding
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-47151
ER  - 
TY  - JOUR
A1  - Wehgartner, Irma
T1  - Röntgenstrahlen und Archäologie
N2  - Naturwissenschaftliche Untersuchungsmethoden werden heute ganz selbstverständlich zur wissenschaftlichen Erforschung archäologischer Objekte herangezogen. Dies gilt für die Materialbestimmung und die Klärung von Herstellungstechniken ebenso wie für die Feststellung von Alter oder Zugehörigkeit zu einer bestimmten Kulturlandschaft. Zugleich spielen diese Methoden bei der Echtheitsprüfung von Stücken unklarer Provenienz eine nicht unerhebliche Rolle.
KW  - Archäologie
KW  - Röntgenstrahlung
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-53827
ER  - 
TY  - JOUR
A1  - Waelbroeck, M.
A1  - Camus, J.
A1  - Tastenoy, M.
A1  - Feifel, R.
A1  - Mutschler, E.
A1  - Tacke, R.
A1  - Strohmann, C.
A1  - Rafeiner, K.
A1  - Rodrigues de Miranda, J. F.
A1  - Lambrecht, G.
T1  - Binding and functional properties of hexocyclium and sila-hexocyclium derivatives to muscarinic receptor suhtypes
JF  - British Journal of Pharmacology
N2  - 1 We have compared the binding properties of several hexocyclium and sila-hexocyclium derivatives to muscarinic Ml receptors (in rat brain, human neuroblastoma (NB-OK I) cells and calf superior cervical ganglia), rat heart M2 receptors, rat pancreas M3 receptors and M4 receptors in rat striatum, with their functional antimuscarinic properties in rabbit vas deferens (Ml/M4-like), guinea-pig atria (M2), and guinea-pig ileum (M3) muscarinic receptors.
2 Si la-substitution (C/Si exchange) of hexocyclium (~ sila-hexocyclium) and demethyl-hexocyclium (~demethyl-sila-hexocyclium) did not significantly affect their affinities for muscarinic receptors. By contrast, sila-substitution of demethoxy-hexocyclium increased its affinity 2 to 3 fold for all the muscarinic receptor subtypes studied.
3 The p-fluoro- and p-chloro-derivatives of sila-hexocyclium had lower affinities than the parent
compound at the four receptor subtypes, in binding and pharmacological studies.
4 In binding studies, o-methoxy-sila-hexocyclium (Ml = M4 ~ M3 ~ M2) had a much lower affinity than sila-hexocyclium for the four receptor subtypes, and discriminated the receptor subtypes more poorly than sila-hexocyclium (Ml = M3> M4> M2)' This is in marked contrast with the very clear selectivity of demethoxy-sila-hexocyclium for the prejunctional MtlM4-like heteroreceptors in rabbit vas deferens.
5 The tertiary amines demethyl-hexocyclium, demethyl-sila-hexocyclium and demethyl-o-methoxy-silahexocyclium had 10 to 30 fold lower affinities than the corresponding quaternary ammonium derivatives.
KW  - Hexocyclium/sila-hexocyclium derivatives
KW  - o-methoxy-sila-hexocyclium
KW  - muscarinic receptor subtypes
KW  - structure/ affinity relationships
KW  - binding/functional correlations
KW  - muscarinic receptor antagonists
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-128265
VL  - 112
ER  - 
TY  - JOUR
A1  - Vortkamp, Andrea
A1  - Gessler, Manfred
A1  - Paslier, D. Le
A1  - Elaswarapu, R.
A1  - Smith, S.
A1  - Grzeschik, Karl-Heinz
T1  - Isolation of a yeast artificial chromosome contig spanning the Greig cephalopolysyndactyly syndrome (GCPS) gene region
N2  - Disruption of the zinc finger gene GLI3 has been shown to be the cause of Greig cephalopolysyndactyly syndrome (GCPS), at least in some GCPS translocation patients. To characterize this genomic region on human chromosome 7p13, we have isolated a VAC contig of more than 1000 kb including the GLI3 gene. In this contig the gene itself spans at least 200-250 kb. A CpG island is located in the vicinity of the 5' region of the known GLI3 cDNA, implying a potential promoter region.
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30182
ER  - 
TY  - JOUR
A1  - Ulrichs, Karin
A1  - Wang, H.
A1  - Müller-Buchholtz, W.
T1  - Down-regulation of xenophile antibodies by 15-deoxyspergualin in an experimental animal model
N2  - No abstract available
KW  - Chirurgie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-44733
ER  - 
TY  - JOUR
A1  - Ulrichs, Karin
A1  - Eckstein, V.
A1  - Tibell, A.
A1  - Groth, C. G.
A1  - Korsgren, O.
A1  - Müller-Ruchholtz, W.
A1  - Thiede, A.
T1  - Natürliche und induzierte xenoreaktive Antikörper vor und nach klinischer Transplantation fötaler porziner Pankreasinselzellen
N2  - No abstract available.
KW  - Antikörper
KW  - Langerhans-Inseln
KW  - Schwein
KW  - Transplantation
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-72967
ER  - 
TY  - JOUR
A1  - Ulrichs, Karin
A1  - Eckstein, V.
A1  - Müller-Buchholtz, W.
T1  - Xenogeneic T-cell-mediated immune reactivity in the model of pig-to-humans: first findings with native stimulator cells
N2  - No abstract available
KW  - Chirurgie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-44755
ER  - 
TY  - JOUR
A1  - Ulrichs, Karin
A1  - Eckstein, V.
A1  - Korsgren, O.
A1  - Tibell, A.
A1  - Groth, C. G.
A1  - Müller-Ruchholtz, W.
T1  - Characterization of natural and induced human xenophile antibodies before and after transplantation of the fetal porcine endocrine pancreas
N2  - No abstract available.
KW  - Bauspeicheldrüse
KW  - Antikörper
KW  - Transplantation
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86985
ER  - 
TY  - JOUR
A1  - Ulrichs, Karin
A1  - Bosse, M.
A1  - Wacker, HH
A1  - Heiser, A.
A1  - Müller-Ruchholtz, W.
T1  - Histologic analysis of the porcine pancreas to improve islet yield and integrity after collagenase digestion
N2  - No abstract available
KW  - Chirurgie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-45166
ER  - 
TY  - JOUR
A1  - Tönnies, D.
A1  - Bacher, G.
A1  - Forchel, Alfred
A1  - Waag, A.
A1  - Litz, Th.
A1  - Hommel, D.
A1  - Becker, Charles R.
A1  - Landwehr, G.
A1  - Heuken, M.
A1  - Scholl, M.
T1  - Optical study of interdiffusion in CdTe and ZnSe based quantum wells
N2  - No abstract available
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-37750
ER  -