showing 36 of ~574560 from 574555 documents
Lenguaje y experiencia de la fenomenología de Husserl
1983
El historiador de la Filosofía tiene que moverse siempre dentro de una dramática tensión entre la atracción que despiertan las nuevas teorías, que parecen dejar en una lejanía mortal a las que tuvieron vida en el pasado, y su convicción de que no todo está muerto en éstas, que es posible reanimarlas insuflándoles nueva energía para que pongan de manifiesto la supervivencia de sus problemas (que son lo más persistente en todo sistema filosófico) y de buena parte de su instrumental teórico . La tentación de realizar esa reanimación se hace más acuciante cúando se advierte la relativa novedad de lo que quiere ser nuevo o, dicho de otra manera, la vigencia que de hecho tiene lo pretérito en el …
Synthese und biochemische Eigenschaften substituierter Phenoxy- und Anilino-1,3,5-triazine
1983
Die nucleophile Substitution eines Chloratoms in 2,4-Dichlor-6-diethylamino-1,3,5-triazin (1) durch die Hydroxyacetophenone 2a–c fuhrt zu den 2-Acetylphenoxy-4-chlor-6-diethylamino-1,3,5-triazinen 3a–c. Analog geht aus der Umsetzung von 1 mit 4-Fluoranilin (4a) das Monoanilinoderivat 5a hervor; dagegen bildet sich unter den gleichen Reaktionsbedingungen aus 1 und 2-Fluoranilin (4b) das Dianilinoderivat 5b. Strukturtyp 3 zeichnet sich durch antimykotische und Antiprotozoenwirksamkeit aus, wahrend 5 herbizide Wirkungen auszulosen vermag. Synthesis and Biochemical Properties of Substituted Phenoxy- and Anilino-1,3,5-triazines The nucleophilic substitution of one chlorine atom in 2,4-dichloro-6…
A New Culture Technique: An Approach to the in-Vitro Reconstitution of Endocrine Organs
1983
A new cell culture technique called three-dimensional-rotation culture (3dR-culture) has been developed. Its main characteristics are: (i) cultivation under constant rotation, and (ii) the use of a three-dimensional material that allows the cells to adhere and to grow in a three-dimensional arrangement. Two glassfibre materials and one gelatine-sponge proved suitable for the use in cell culture. The new technique has the advantage to yield in large numbers cells bound on a stable matrix that can easily be handled, e.g. for implantation.
Studies of Weak Beta-Delayed Protons Emitted in the Decay of Odd-Z, Tz = -3/2 Nuclei
1983
Radioactive decay of Tz = - 3/2 nuclides, 27P and 31Cl, predicted to be weak β-delayed proton precursors, have been looked for. Two proton groups having energies of 989 ± 15 and 1528 ± 20 keV and a half-life of 150 ± 25 ms were associated with the decay of 31Cl. The search for 27P is still under way, but the first qualitative results are briefly discussed.
Propositions derivées des réunions de travail de janvier et février 1983
1983
Assaig sobre els valors emancipatoris (elements per a una reformulació)
1983
Identification et dosage des acides monomères à structure cyclique hydrogénés dans les lipides hépatiques du rat ayant ingéré de l'huile chauffée
1983
62 ref.; National audience
An ESCA and Mössbauer study of the oxide layer formed on steel in water containing chromate and chloride ions
1983
Abstract The formation of oxidic layers on steel in chromate solutions was studied by photo-electron and Mossbauer spectroscopy. To simulate more aggressive realistic systems, some chloride ions were added to the solution. The layers formed under these conditions were found to be thicker by an order of magnitude than those formed in the absence of chloride ions. They probably consist of ferric and chromic oxides of the corundum type (Fe 1−2 Cr x ) 2 O 3 , with the Cr : Fe ratio being depth dependent. The oxide layer is subdivided into small regions behaving superparamagnetically. This heterogeneity of the layer is ascribed to the attack by the chloride ions. The structure of the oxides foun…
Ringoffene Serotonin-Analoga, 2. Mitt.1) Synthese von 3-(2-Aminophenyl)-propanamin- und 1-(N-Piperidino)-3-(2-aminophenyl)-3-oxo-propan-Derivaten
1983
Die Darstellung der Titelverbindungen gelingt via Mannich-Reaktion beim Einsatz geeignet substituierter Acetophenone. Die Gewinnung von 2 und seiner Derivate erfordert zusatzlich die nachfolgende durchgreifende Hydrierung der Carbonylgruppe der entsprechenden Mannichbasen. Ring-Opened Analogues of Serotonine, II: Synthesis of 3-(2-Aminophenyl)propanamine and 1-(Piperidin-1-yl)-3-(2-aminophenyl)propan-3-one and Their Derivatives The synthesis of the title compounds was achieved by Mannich reaction of suitably substituted acetophenones. The preparation of 3-(2-aminophenyl)propanamine and its derivatives requires complete hydrogenation of the carbonyl group of the Mannich bases.
José Vidal Beneyto, un sociólogo que interpreta y hace historia: "La conflictividad laboral no aumentará en 1983"
1983
Uncoupling properties of the herbicide N-n-Pentyl-N-Methyl-N'-(3,4-Dichlorophenyl)-Urea
1983
International audience
La Restauración como desenlace del movimiento alfonsista (II)
1983
Applications pratiques des endomycorhizes VA
1983
National audience
Solidaridad judía ante la expulsión: contratos de embarque (Valencia, 1492)
1983
La sociedad de la comunicación
1983
Holomorfia y desarrollos asintóticos en dimensión infinita
1983
Regulatory properties of nucleoside phosphotransferase from mucosa of chicken intestine
1983
Nucleoside phosphotransferase from chicken intestinal mucosa is an associated multisubunit protein which can dissociate into components of lower molecular weight. The associated and the dissociated forms have the same substrate specificity but the first (A) shows a higher V(max) and a lower S(0.5) value than the second (B), whichever phosphate donor or nucleoside acceptor was employed. Moreover with form A the interaction coefficient in the Hill plots; as measured with a phosphate donor, varied: they always showed a higher result (about 2) than with form B (about 1). A brief preincubation at 37°C of form A modified the values both of the inactivation constant and of the enzyme kinetic param…
Robert le Diable au XIXe siècle
1983
Lalitte Philippe. Robert Le Diable au XIXe siècle. In: Médiévales, n°6, 1984. Au pays d'Arthur. pp. 95-108.
Eudesmanolides of Artemisia barrelieri
1983
Abstract A new eudesmanolide, barrelin, was identified from the herbal part of Artemisia barrelieri . 1-Oxo-6β,7α,11β- H -eudesm-4-en-6,12-olide and 1β-hydroxy-6β,7α,11β- H -eudesm-4-en-6,12-olide were also isolated from the same source.
Vidal-Beneyto o El optimismo en la sociologia
1983
Estudio de las Medidas Radiométricas realizadas desde satélites artificiales : Aplicación a la Agrometeorología
1983
Resonant scattering in macromolecular structure research. Applications in molecular biology and material science
1983
Abstract This report concerns the X-ray resonance scattering work carried out using the instrument X15 which receives synchrotron radiation from the storage ring DORIS. X15 covers a wavelength range from 0.6 to 3.3 A. It therefore accesses resonance scattering at the K-absorption edges of the elements with Z = 20 (Ca) to Z = 42 (Mo) and at the L 3 -absorption edges from Z = 50 (Sn) to all heavier atoms. The instrument consists of a double monochromator with a vertical offset of the beam by 1.22 m and a camera of 10 m length. A multiwire proportional chamber (from A. Gabriel) at the end of the evacuated beam line detects the scattered X-ray photons on its area 200 mm × 200 mm. The distances …
Verbesserung der invers-voltammetrischen Bestimmung des Thalliums neben Blei durch elektrochemische Maskierung
1983
Die invers-voltammetrische Bestimmung des Thalliums in Grundlosungen mit Komplexonen wird durch elektrochemische Maskierung mit Tensiden in Anwesenheit eines 104–105fachen Bleiuberschusses moglich. Im untersuchten Bereich von 10−8–10−6 M Tl wurden lineare Eichkurven erhalten. Die Reproduzierbarkeit mit und ohne Tensid zeigte keine signifikanten Unterschiede.
DIN-Norm für PASCAL
1983
Die DIN-Norm Pascal ist aus einer Ubersetzung der ISO 7185 Pascal-Norm entstanden, die zum 1. Dezember 1983 von ISO nach einer mehrjahrigen Entwurfsphase verabschiedet wurde.
Genetic variability in flowering time within a population of Avena fatua
1983
International audience
El Morrón del Cid (La Iglesuela del Cid)
1983
Habitado de manera prácticamente ininterrumpida desde la Prehistoria hasta nuestros días. la importancia arqueológica de El Morrón del Cid empezó a ser valorada a partir de 1610, año en que el cronista valenciano Gaspar Escolano publicó por primera vez la inscripción ibérica conservada actualmente en el interior de la Ermita de Nuestra Señora de l Cid. Desde entonces, los epígrafes ibéricos y latinos aparecidos en sus ruinas han sido prácticamente los únicos elementos arqueológicos conocidos de este importante yacimiento.
Detection of the liquid ? liquid demixing by differential scanning calorimetry
1983
From theoretical considerations it is concluded that the demixing temperatures of moderately concentrated polymer solutions should manifest themselves in a change of the slope of the corresponding DSC trace; the effects are expected to suffice for detection by means of the commercially available dual furnace instrument DSC-2C from Perkin-Elmer.
Les constituants volatils des vins jeunes de maceration carbonique
1983
National audience
Los excepcionales temporales de octubre y su relación con las temperaturas del mar
1983
La escritura en la Cartuja (análisis diacrónico a través de las constituciones)
1983
Volcanism in the Southern Part of the Hocheifel
1983
In the Hocheifel Area, preexisting fractures oriented N-S and E-W were obviously of great importance in the rise of the Tertiary magmas.
Palaeomagnetic investigations in the Hercynian mountain belt of central Europe
1983
Abstract The palaeomagnetism of sediments and volcanics of Middle Devonian to Early Carboniferous age has been studied in the Hercynian realm of the Vosges, Harz and Franconian Forest (France and Germany). After appropriate cleaning, characteristic directions of natural remanent magnetization (NRM) have been determined, which are considered to be of pretectonic origin according to rock magnetic and structural geological evidence. A mean palaeopole for the Devonian rocks in the areas investigated was determined at — 29.7°N and 9.0°E. The site latitude derived from the Devonian rocks agrees very well with that observed in Great Britain and Britanny. The significant difference in longitude bet…
El poder de la imaginación
1983
Insertion professionnelle de sortants d'apprentissage : influence de la segmentation scolaire, du métier et des caractéristiques personnelles sur l'e…
1983
Two polyhydroxystilbenes from stems of Phoenix dactylifera
1983
Abstract From stems of Phoenix dactylifera trans-3,5,3′,5′-tetrahydroxy-4-methoxystilbene has been isolated as a major component; cis-3,5,3′,5′-tetrahydroxy-4-methoxystilbene and trans-3,5,4′-trihydroxystilbene were isolated as minor components. Other metabolites from the biogenetic route to these stilbenes were also characterized.