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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing
    Psychophysiology 38 (2001), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: The aim of the present study was the comparative assessment of the 4-week test-retest stabilities of the saccadic CNV (sCNV) and saccadic reaction times (SRT) during the execution of pro- and antisaccades, as well as the stability of RT during execution of two neuropsychological tests of alertness and S-R incompatibility. Prosaccades were elicited under the 200-ms gap and overlap conditions, antisaccades under the overlap condition (64 trials each). The EEG was recorded from 25 channels with a DC amplifier (MES, Munich). Data of 20 healthy participants were statistically analyzed. We found high test-retest correlations for all SRT (.76 ≤rtt≤ .88) and neuropsychological (.62 ≤rtt≤ .88) measures. For the sCNV, coefficients ranging between .58 (pro/gap) and .77 (anti/overlap) were obtained. Whereas SRT were significantly faster during the second than during the first session, group means for the saccadic CNV were stable across the sessions. Our results suggest high 4-week stability of individual differences in SRT, and moderate to good stabilities of saccadic CNV amplitudes. Our results recommend these “traitlike” measures to be used in individual differences research.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 22 (1995), S. 15-32 
    ISSN: 1573-1111
    Keywords: β-Cyclodextrin ; triflumizole ; host-guest complex ; inclusion complex ; solvent accessible surface ; solubility enhancement ; hydrophobic effect ; dynamic Monte Carlo molecular docking
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Solubility enhancement of the fungicide triflumicole byβ-cyclodextrin is explained using a thermodynamic approach. The influence of organic cosolvents on the overall equilibrium constants of triflumizole complexation withβ-cyclodextrin in aqueous solutions has been investigated. Their variance in mixed solvents is only partly explained by a competitive inclusion of substrate and cosolvent molecules inβ-cyclodextrin. The geometries of host-guest complexes have been estimated by molecular mechanics calculations. Their broad structural variety caused by the flexibility of host and guest molecules and different association possibilities of triflumizole have been analysed by a dynamic Monte Carlo docking method. The hydrophobic effect has been simulated by cominimization of the hydrophobic contributions to the solvation energy, calculated from the solvent accessible surface area of the complex and the conformational (potential) energy.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Der Nervenarzt 71 (2000), S. 431-441 
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Genetik ; Dystonie ; Übersicht ; Key words Genetics ; Dystonia ; Review
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary To date, at least 12 types of primary dystonia can be distinguished on a genetic basis. A 3-bp deletion in the DYT1 gene causes early onset, generalized torsion dystonia (TD), and mutations in the GTP cyclohydrolase I and the tyrosine hydroxylase genes result in dopa-responsive dystonia (DYT5). A missense change in the D2 dopamine receptor in one large family (DYT11) has recently been implicated in myoclonus-dystonia. Furthermore, seven other loci for dystonia genes have been mapped to chromosomal regions, including a locus for a mixed dystonia phenotype (DYT6), one form of focal dystonia (DYT7), three types of paroxysmal dystonia (DYT8–10), X-linked dystonia-parkinsonism (DYT3), and rapid-onset dystonia-parkinsonism (DYT12). No positive linkage results have yet been obtained for autosomal recessive TD (DYT2) and several other families of different types of dominantly inherited TD (DYT4). In addition, hereditary secondary dystonia may occur as part of familial diseases of the basal ganglia, metabolic and storage disorders, and various X-linked and other familial neurodegenerative syndromes affecting the basal ganglia. It may be anticipated that the traditional clinical and etiological classifications of dystonia will increasingly be replaced by a genetic one and that the identification of more dystonia genes may lead to a better understanding of these largely nondegenerative disorders.
    Notes: Zusammenfassung Gegenwärtig lassen sich 12 Typen von primären Dystonien (DYT1 – 12) genetisch unterscheiden. Die Deletion dreier Basenpaare im DYT1-Gen verursacht die generalisierte Torsionsdystonie (TD) mit frühem Beginn. Weiterhin konnten Mutationen im GTP-Zyklohydrolase-I- und im Tyrosinhydroxylase-Gen gefunden werden, die in Zusammenhang mit Dopa-responsiver Dystonie (DYT5) stehen, sowie eine mit myoklonischer Dystonie assoziierte Sequenzveränderung im D2-Dopaminrezeptor (DYT11). Außerdem wurden 7 weitere Dystonieloki kartiert, darunter die für einen gemischten Dystoniephänotyp (DYT6), eine Form der fokalen Dystonie (DYT7), 3 Typen von paroxysmaler Dystonie (DYT8–10), das X-chromosomal vererbte Dystonie-Parkinson-Syndrom (DYT3) und das Dystonie-Parkinson-Syndrom mit plötzlichem Beginn (DYT12). Für die autosomal-rezessive TD (DYT2) und einige größere Familien mit verschiedenen Formen dominant vererbter TD (DYT4) konnten bislang noch keine positiven Kopplungsstudien durchgeführt werden. Zusätzlich kommen erbliche, aber sekundäre Dystoniesyndrome im Rahmen von familiären Basalganglienerkrankungen, Stoffwechselstörungen und Speicherkrankheiten sowie verschiedener X-chromosomal vererbter und anderer familiärer neurodegenerativer Syndrome vor. Es ist anzunehmen, dass die klassische Einteilung der Dystonien nach klinischen und ätiologischen Kriterien mehr und mehr durch eine genetische ersetzt werden wird. Hierbei kann die Identifikation weiterer Dystoniegene zu einem besseren Verständnis dieser größtenteils nicht-degenerativen Erkrankungen beitragen.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 865-868 
    ISSN: 0044-2313
    Keywords: Adducts of decamethylsilicocen, IR spectroscopy in liquid gases ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Komplexe von Decamethylsilicocen: Cp2*Si(CO) und Cp2*Si(N2)Es wird über die Synthese und den IR-spektroskopischen Nachweis von Monocarbonyl- und Monostickstoffkomplexen des Decamethylsilicocens in flüssigem Xenon (LXe) oder flüssigem Stickstoff (LN2) berichtet. Die Reaktionen sind bei einigen bar CO oder N2 höchst unvollständig und reversibel, wenn der Gasdruck abgelassen wird. Cp2*Si(CO) kann anhand dreier Isotopomere nachgewiesen werden, während Cp2*Si(N2) auf zwei unterschiedlichen Synthesewegen zugänglich ist.
    Notes: The synthesis and IR spectroscopic detection of the monocarbonyl and mononitrogen complex of decamethylsilicocen in liquid xenon (LXe) and liquid nitrogen (LN2) is reported. The reactions were found to be highly incomplete under a few bar of CO or N2 and reversibel when the pressure is released. Cp2*Si(CO) is characterized by three isotopomeres and Cp2*Si(N2) was synthesized on two independent routes.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0736-0266
    Keywords: Angiogenesis ; Bone healing ; Bone repair ; Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: A lipid material extracted from the omentum has previously been shown to contain a potent angiogenetic activator (20), capable of creating intense vasoproliferation in traumatized tissues (19). This study was undertaken to analyze the efficacy of local administration of this omental lipid fraction on osseous vascularization and bone repair. An osteoperiosteal segmental femoral defect in the rat was replaced by a demineralized allogenic bone graft exposed to continuous local delivery of omental lipid via an implanted miniosmotic pump. Saline solution delivered in the same way served as a control. Neovascularization and bone formation in the transplant were quantitatively evaluated by means of dynamic radioisotopic bone imaging, radiographic photodensitometry, microangiography, and biomechanical testing. Compared with the control group, the omental lipid angiogenic fraction-treated specimens showed an 80% overall increase (p 〈 0.001) in bone density as well as a twofold increase (p 〈 0.001) in regional blood perfusion, maximal at 2 weeks following surgery. At 12 weeks, biomechanical testing demonstrated significantly higher union rate (p 〈 0.05) and strength (p 〈 0.01) in the treated specimens as compared with the controls. These data demonstrate that the omental lipid fraction factor has potent angiogenic properties that enhance bone blood perfusion and bone regeneration.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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