showing 36 of ~574560 from 574555 documents
Zusammenfassung der Diskussion zum Thema: „Wirkungsbeeinflussung von Muskelrelaxanzien“
1980
Welche Bedingungen sind aus klinischer und pharmakologischer Sicht an ein ideales Muskelrelaxans zu stellen?
57Fe- MÖSSBAUER EMISSION SPECTROSCOPY OF AN IRON (II) COMPLEX WITH TEMPERATURE DEPENDENT SPIN STATE
1980
La conciliazione impossibile
1980
On the spatial spread of a pattern
1980
A simple process is considered for the spread of a pattern in a spatially distributed population. Expressions are given for the stochastic means, variances and covariances. Central limit theorems are obtained for the number of individuals that have the pattern, and the time needed for the pattern to reach the n-th subpopulation.
Análisis, autoconciencia y libertad
1980
La pretensión de Ernest Tugendhat en Autoconciencia y autodeterminación es la de elaborar un punto de vista con el que quepa enfrentarse a los problemas de Hegel (los nuestros) y mostrando que sólo un punto de vista analítico puede resultar hoy por hoy justificable. Se trata de probar no ya la capacidad destructiva, sino de mostrar la capacidad constructiva del análisis filosófico.
Verdrängte Wissenschaften: XVIII. Symposium der Gesellschaft für Wissenschaftsgeschichte 15.-17. Mai 1980 in Marburg
1980
INVESTlGATlON OF THE SPIN CROSSOVER IN [FexM1-x(Phen)2 (NCS)2] (M = Mn, Co, Ni)
1980
L'apprendimento sul campo nella formazione professionale degli operatori sociali: rapporto di ricerca
1980
Amerikanische Soziologie unter Einschluss der Englischen
1980
Die amerikanische Soziologie beginnt mit dem Sozialdarwinismus. Diese Lehre entsprach einer Gesellschaft, die sich in rascher Entwicklung befand, ohne diese als Last anzusehen. In Amerika, so hatte Tocqueville bemerkt, konnte sich jedermann ohne Muhe bereichern, und das Streben nach materiellem Reichtum erschien deswegen als unproblematisch. Es fuhrte nicht zu der sozialen Frage, mit der sich die europaischen Gesellschaften schon im 19. Jahrhundert konfrontiert sahen. Wer sich mit den Schriften der Grundervater der amerikanischen Soziologie beschaftigt, wird, bei allen Differenzen, die im einzelnen bestehen, bei den Sozialdarwinisten, Sozialpsychologen und Pragmatisten, ein eigentumliches K…
The Lower Secondary School and in Particular its Curriculum: the Spanish case
1980
Vidal Beneyto: "Lo efímero es el signo de los años setenta"
1980
Reductive and oxidative metabolism of nitrofurantoin in rat liver.
1980
The elimination of nitrofurantoin was studied in the isolated rat liver using a recirculating hemoglobin-free perfusion system. The most rapid clearance of nitrofurantoin (0.1 mM) was found under hypoxia (8 ml/min) or anoxia (11 ml/min) indicating a fast and oxygen-sensitive reductive metabolism. The hepatic elimination of nitrofurantoin under anaerobic conditions apparently is not catalyzed by xanthine oxidase, aldehyde oxidase or cytochrome P-450 as judged from the lack of influence of the inhibitors (0.1 mM) allopurinol, menadione, metyrapone, α-naphthoflavone or of carbon monoxide (50%; v/v). Under aerobic conditions the hepatic clearance of nitrofurantoin is rather low (1 ml/min) indic…
Vidal Beneyto clausuró el ciclo sobre terrorismo y sociedad
1980
Complexes of organothallium(III) with Cis-1,2-dicyanoethylenedithiolate ion and a ‘tripod’ ligand. Synthesis, infrared and proton magnetic resonance …
1980
Abstract The reaction of cis-1,2-dicyanoethylenedithiolate ion (mnt2− with organothallium(III) derivatives has been examined. The complexes [(CH3)2Tl]2mnt and [(C4H9)4N] [(C6H5)2Tl mnt] have been synthesized. The results seem to indicate a trend in reactivity similar to that of arylmercury(II) derivatives towards chelating agents with nucleophilic character. In addition, the complex [(CH3)2Tl(tren)] [BPh4] has been obtained as a test of the complexing ability of 2,2′, 2″-triaminotriethylamine(tren) towards organometallic moieties. I.r. and 1H n.m.r. are presented and discussed.
Mutagenicity of Closely Related Carcinogenic and Noncarcinogenic Compounds Using Various Metabolizing Systems and Target Cells
1980
A total of 49 heteropolycyclic compounds belonging to structurally homogenous series was investigated for bacterial mutagenicity in the Ames test. The same batches of compounds were tested for carcinogenicity by injection into subcutaneous tissue of mice? 22 test compounds were carcinogenic, some strongly, others weakly. With the exception of one weak carcinogen, all these compounds were mutagenic. However, 15 of 27 noncarcinogens (56%) were also mutagenic. Moreover, noncarcinogenic, weakly carcinogenic, and strongly carcinogenic mutagens showed very similar mutagenic potencies.
‘Ags. fahame’
1980
An evaluation of a model ecosystem with DDT
1980
The reproducibility, variability, and reliability of a simple aquatic-terrtestrial model ecosystem experiment was tested with p,p'-DDT. The variation among the model replicates as well as within the units was studied by using hierarchal analysis of variance. the complete budget of the chemical was calculated and a theoretical transport model was constructed. The degradation and accumulation of DDT was followed by gas chromatographic residue analysis, which showed good reproducibility of the experimental design. The degradation of DDT in the model was similar to that found in the field, but the determination of concentration factors was questionable. The material balance tables revealed that…
Comunidades religiosas masculinas de Valencia de 1901
1980
Classical ionic fluids in the mean spherical approximation
1980
The recently obtained analytical solution of the mean spherical approximation has been used to calculate thermodynamic and structural properties of aqueous solutions of asymmetric electrolytes. The same approximation has also been used to calculate structure functions of pure and mixed molten salts. The agreement between experimental or “quasi-experimental” structure functions and those obtained within the framework of the MSA is quite good especially when the ionic radii are obtained by fitting the long wavelength limit of the structure functions to the isothermal compressibility of the system, under the condition that the diameter ratio is the same as in the crystal.
Amygdaloidal basalts: Isotopic and petrographic evidence for non-diagenetic crustal source of carbonate inclusions
1980
Even though carbonate amygdules in volcanics are generally assumed to be diagenetic in origin, the authors are of the opinion that almost all carbonate inclusions in the investigated amygdaloidal volcanic rocks from Sicily (Italy), Pindos (Greece) and Bohemia (Czechoslovakia), have a different origin. On the basis of a mineralogical, petrological and geochemical study these “amygdules” are interpreted as being remains ofmagmatic incorporation of carbonate. Therefore, the identification of carbonate globules in volcanics purely on field observations, is inadequate to distinguish true amygdules from carbonate assimilation remnants. A nomenclature of the various types of inclusions is proposed…
Excerpta de senectute
1980
Zusammenfassung der Diskussion zum Thema: „Spezielle Probleme der Komponententherapie“
1980
El monumento funerario romano con friso dórico de Sagunto
1980
The Effect of Blue and Red Light on the Content of Chlorophyll, Cytochrome f, Soluble Reducing Sugars, Soluble Proteins and the Nitrate Reductase Act…
1980
The photosynthetic characteristics of many species of plants are influenced by the light intensity under which the plant is grown. This is shown by the light saturation curves for CO2 uptake. Both the light intensity required for saturation and the light-saturated rate of CO2 uptake increase with the light intensity under which the plant is grown. Photosynthetic adaptation to different light levels involves balanced changes of many leaf factors. Low-light and high-light plants differ in a number of component steps of photosynthesis as well as in the structure and composition of the photosynthetic apparatus and in the leaf anatomy (see reviews by Boardman 1977; Wild 1979).
Синтез и оптические свойства монокристаллических слоев окислов щелочноземельных металлов
1980
Struktur-Wirkungs-Beziehungen bei Histaminanaloga, 21. Mitt. Synthese und Wirkung Nα-substituierter Histamine
1980
Es wurden Nα-substituierte Histamine dargestellt und auf ihre agonistische Wirkung an Histamin H1- und H2-Rezeptoren untersucht. Structure-Activity Relationships of Histamine Analogues, XXI: Synthesis and Pharmacology of Nα-Substituted Histamines Nα-Substituted histamines were synthesized and investigated with regard to their agonistic activity at histamine H1 and H2 receptors.
Zur Morphologie, Klinik und Immunpathologie der Virus B-Hepatitis im Säuglings- und Kindesalter
1980
In Abhangigkeit von der Funktion des Immunsystems reagiert der kindliche Organismus nach einer Hepatitis Virus B-Infektion mit einem breiten Spektrum von verschiedenen HB s Ag-positiven Lebererkrankungen. Wahrend eine normale Immunantwort mit einer Elimination des Hepatitis B-Virus und seiner assoziierten Antigene einhergeht, fuhrt eine inadaquate Immunreaktivitat zu einer Virus- und/oder Antigenpersistenz im Serum und Lebergewebe.
Un paraguas rojo o la producción de la escasez
1980
Éducation et productivité agricole: résultats provisoires d'une application au cas français
1980
Données actuelles sur l'orientation des bacheliers
1980
International audience; Les données rassemblées ici sont issues d'une enquête longitudinale récente qui a permis de suivre une cohorte d'élèves de classe terminale entre le moment des projets (printemps 76) et celui des orientations effectives, selon le résultat de l'examen (octobre 76). L'interrogation porte d'abord sur les déterminants individuels des choix, puis se heurte à l'existence probable de déterminants contextuels qui débordent le cadre de la présente étude centrée sur la demande d'éducation (et négligeant par là même l'impact dynamique de facteurs comme l'offre d'éducation). La recherche, qui s'inscrit dans un cadre essentiellement économique et sociologique, met l'accent, dans …
NADPH-cytochrome P-450 reductase: Preferential inhibition by ellipticine and other type II compounds having little effect on NADPH-cytochrome c reduc…
1980
Abstract Ellipticine (5,11-dimethyl-[6H]-pyrido[4,3b]carbazole) binds with an affinity greater than most other compounds known to interact with P-450. Control and 3-methylcholanthrene-induced aryl hydrocarbon (benzo[ a ]pyrene) hydroxylase (EC 1.14.14.2) and acetanilide 4-hydroxylase and control and phenobarbital-induced ethylmorphine N -demethylase activities are all markedly inhibited by ellipticine to about the same extent. Ellipticine and other Type II compounds (metyrapone, octylamine-1, pyridine and aniline) preferentially inhibit NADPH-cytochrome P-450 reductase activity, while affecting NADPH-cytochrome c reductase activity very little. Butanol-1, a compound having pure Reverse Type…
Las cartas que tenemos
1980
La población universitaria de España en el siglo XVIII
1980
Un balance de la situación de la población estudiantil de España en el siglo XVIII y el sentido de estos estudios para la historia de la universidad y la ciencia.
Die perkutane Nephrolitholapaxie
1980
Der operativen Nierensteinentfernung sind trotz verbesserter Operationstechniken Grenzen gesetzt. Ein alternatives und wenig belastendes Verfahren ist die perkutane Steinextraktion. Diese Technik stutzt sich auf zwei Fakten: 1. Uber einen Nephrostomiekanal konnen Nierensteine wie Blasensteine mechanisch oder mit dem Ultraschall-Lithotriptor zertrummert und extrahiert werden; 2. die perkutane Nephrostomie, in Lokalanasthesie unter Ultraschall- oder Rontgenkontrolle durchgefuhrt, bietet Zugang zu Steinen beliebiger Lokalisation.