showing 36 of ~574560 from 574555 documents
Abnormal Lipopigments and Lysosomal Residual Bodies in Metachromatic Leukodystrophy
1990
Ultrastructurally, metachromatic leukodystrophy (MLD) is marked by characteristic features such as herringbone, prismatic and tufaceous patterns which are typically encountered within oligodendrocytes of the central nervous system (CNS) and in Schwann cells (PNS). These patterns can be documented in late infantile, juvenile, and adult forms. In the latter, aging of the ailing individual adds another component, the accumulation of lipopigments which are marked by an opaque supposedly lipid droplet and a granular component. While MLD-specific lysosomal residual bodies occur in myelinforming cells, lipopigments accrue in neurons and to a lesser degree in astrocytes. MLD represents a unique exa…
Antineoplastika, 19. Mitt.: Darstellung vonN-[2-Chlor-4-diethylamino-(1,3,5-triazin-6-yl)]-aminosäuren
1990
Search for scalar quarks in Z0 decays
1990
A search has been made for pairs of scalar quarks (squarks) produced in e+e- annihilations at LEP (√s≃MZ0), and decaying into a standard quark and a neutral, non-interacting, stable, massive particle (the lightest supersymmetric particle, LSP). The search has been conducted for differences in the mass of the squark and LSP of 2 GeV/c2 and above. Up squarks with masses below 42 GeV/c2 and down squarks below 43 GeV/c2 were excluded. Six squark flavours degenerate in mass were excluded below 45 GeV/c2.
Effect of Treatment with rhGM-CSF and Low-Dose Cytosine Arabinoside on Leukemic Blast Cells in Patients with Myelodysplastic Syndromes
1990
Treatment of patients having myelodysplastic a syndromes (MDS) with approaches such as differentiation induction, single cytostatic agents or supportive care only has, up to now, been rather unsuccessful. Aggressive chemotherapy followed by bone marrow transplantation is only suitable for a very small proportion of patients. Thus, there is a need for new therapeutic alternatives.
Antiproton-Proton Cross Sections at Small Momenta
1990
Since the startup of LEAR in 1983 we have undertaken a series of measurements of antiproton-proton cross sections for annihilation (pp → mesons)1, charge-exchange reaction (pp → nn)2, and elastic scattering (pp → pp)3,4. We have focussed our efforts of the measurements on the beam momentum range between 160 and 600 MeV/c. Our detector is optimized to handle the antiproton beam at very small momenta5. The liquid hydrogen target is placed in the vacuum tank, and the vacuum is directly connected to the beam line. The incident beam is defined by thin scintillators also placed in the vacuum. With the apparatus of these unique designs we have explored the beam momentum region below 300 MeV/c with…
Resultados a largo plazo de intervención de Magnuson-Stack modificada para la luxación anterior recidivante de hombro
1990
Los autores han realizado una revisión largo plazo versus corto plazo con 29 pacientes tratados mediante la técnica de Magnuson-Stack por luxación anterior recidivante de hombro. Se encontró un empobrecimiento de los resultados globales, observándose empeoramiento de la estabilidad (pasan del 90.47% de resultados excelentes al 58.62%, así como del 9.52 de resultados malos al 31.03%), aumento del arco de movilidad (movilidad excelente del 57.14 al 82.75%), permaneciendo la función prácticamente inalterada. Twenty-nine patients with recurrent shoulder dislocation trailed surgicaly by modified Magnuson-Stack procedure are colected. The authors made a long-term versus short-term review of resul…
New oxygenated eudesmanolides from artemisia herba-alba
1990
Abstract The aerial parts of Artemisia herba-alba Asso subsp.valentina Lam. (Asteraceae) yielded the new eudesmanolides 1-11 and the new sesquiterpene-monoterpene adducts 12-13. The absolute configuration of compound 6 was confirmed with the aid of X-ray diffraction analysis. Some aspects of the thermal and photochemical reactivity of 2,4-cyclohexadienones are discussed.
Modal analysis for random response of MDOF systems
1990
The usefulness of the mode-superposition method of multidegrees of freedom systems excited by stochastic vector processes is here presented. The differential equations of moments of every order are written in compact form by means of the Kronecker algebra; then the method for integration of these equations is presented for both classically and non-classically damped systems, showing that the fundamental operator available for evaluating the response in the deterministic analysis is also useful for evaluating the response in the stochastic analysis.
Eurotelevisión sin fronteras
1990
Stoned fruit : apricot, plum, peach, cherry
1990
170 ref. chap. 2; International audience
Boolean Models: Maximum Likelihood Estimation from Circular Clumps
1990
This paper deals with the problem of making inferences on the maximum radius and the intensity of the Poisson point process associated to a Boolean Model of circular primary grains with uniformly distributed random radii. The only sample information used is observed radii of circular clumps (DUPAC, 1980). The behaviour of maximum likelihood estimation has been evaluated by means of Monte Carlo methods.
ALEPH: a Detector for Electron-Positron Annihilations at LEP
1990
Process-centred Software Engineering Environments (PSEE) are the most recent generation of environments supporting software development activities. Most of PSEE are based on mechanisms promoting enforcement and automation of process activities. In this kind of mechanisms the process models are prescribed in a detailed and complete way. But the experience shows that supporting processes is more concerned with the flexibility of guidance offered during the process performance than with enforcement of a collection of predefined process models. In this paper, we present a solution to support strategic processes in a PSEE by providing a flexible guidance during process enactment.
Un escándalo
1990
Les nouveaux herbicides
1990
Job seeker's spatial equilibrium in a fuzzy mathematical framework
1990
This paper incorporates complex behavior in a job seeking strategy model. Since the state of information is imperfect, a job seeker faces an imprecise labor market. His behavior is fuzzy and variable. It is shown how this complex behavior can be described by fuzzy subsets theory and bifurcation analysis. The latter examines the discontinuous phenomena. Then it is proved that a job seeker’s fuzzy equilibrium with a spatial constraint exists.
La displasia congénita de cadera y el grupo sanguíneo
1990
Este trabajo analiza la relación existente entre la displasia congénita de la cadera y el grupo sanguíneo. El estudio comprende 116 recién nacidos diagnosticados de displasia congenita de cadera a los que se le aplican los parámetros de grupo sanguí- neo de los sistemas A-B-O y Rh. Como grupo comparativo se calculan las frecuencias fenotípicas de la población española y de la población gallega para observar su comportamiento, lo que nos lleva a la conclusión de que los enfermos con displasia congénita de cadera presentan un patrón de antígenos eritrocitarios de superficie propio y distinto de la población normal. This work analyse the relationship between the Congenital Dysplasia of the Hip…
Phenyltransferase compartmentation in cells of Vitis vinifera cultivated in vitro
1990
International audience
Immuno-fluorescence cytochemistry on thin frozen sections of human substantia nigra for staining of monoamine oxidase A and monoamine oxidase B: a pi…
1990
Immunofluorescence cytochemistry on thin frozen sections of human substantia nigra for staining of MAO-A and MAO-B revealed that only about 10% of the melanin-containing neurons are positive for MAO-A, while they are substantially free of MAO-B.
Població de dret i de fet: Una discussió al voltant de les dades registrades al País Valencià
1990
SE ESTUDIAN LAS VICISITUDES DE LA DIFERENCIA REAL ENTRE "POBLACION DE DERECHO" Y "POBLACION DE HECHO" EN LOS CENSOS Y PADRONES DEL PAIS VALENCIANO, CON ESPECIAL ATENCION AL IMPACTO DE LA MOVILIDAD VACACIONAL A PARTIR DE 1975. CRISIS, TURISMO EXTRANJERO Y ESTACIONALIDAD SON FACTORES QUE TAMBIEN DEBEN SER TENIDOS EN CUENTA. (A)
Niveles de impureza hidrogenoides y sub-bandas eléctricas bidimensionales en el monoseleniuro de indio tipo n
1990
L'apprentissage de niveau V : formation, insertion professionnelle
1990
International audience; Ce texte présente la formation et l'insertion professionnelle des jeunes formés en apprentissage de niveau V, à partir de l'ensemble régional de la Bourgogne. Il ressort que le public concerné par la préparation du premier niveau de qualification professionnelle par alternance se caractérise par une forte hétérogénéité. Elle marque autant la formation que l'entrée sur le marché du travail. L'accès à l'emploi reste influencé par l'effet des spécialités de formation suivies qui se cumule aux effets des caractéristiques individuelles et éducatives des jeunes. Depuis la loi de 1987, l'apprentissage est en pleine mutation et il concernera, à l'avenir un public de formés p…
La exaltación de la monarquía en Valencia: poder, sociedad e ideología en las exequias de Carlos III
1990
Oxygen Radical Production by Alveolar Inflammatory Cells in Idiopathic Pulmonary Fibrosis
1990
Idiopathic pulmonary fibrosis (IPF) is a chronic inflammatory interstitial lung disease characterized by the accumulation of alveolar macrophages (AMs) and neutrophils in the lower respiratory tract, parenchymal cell injury, and fibrosis of the alveolar structure. Reactive oxygen intermediates (ROI) are claimed to be a major cause of tissue damage in IPF; however, the source of ROI has not been unequivocally identified. AMs, as well as neutrophils, are capable of releasing these agents. The contributions of these possible sources are not known. To address this question, we evaluated the spontaneous and stimulated (PMA or zymosan) ROI release of total bronchoalveolar cells and isolated AMs i…
La vida personal y familiar de los alumnos como introducción al estudio de la historia (método y templo históricos)
1990
Orígenes sociales de los tres estamentos ciudadanos en Valencia medieval
1990
La "Junta de Murs i Valls": Historia de las obras públicas en la Valencia del Antiguo Régimen
1990
Technical secondary education in Togo and Cameroon : Research Note
1990
International audience; This paper presents an evaluation of technical secondary education in Togo and Cameroon from the labor market perspective using tracer study data. Individuals face great difficulties in finding a job following training and the most common strategy used to avoid unemployment is to secure work in the informal sector. However, informal sector jobs provide low earnings and there appears to be a large discrepancy between an individual's expected earnings and actual earnings. One solution is to stimulate, and to enhance the role of, informal training through apprentice training centers.
Влагопоглощение органопластиком и его влияние на физико-механические свойства материала
1990
Advisor: Максимов Р. Д., Янсон Ю. О.
4. Internationales Galen-Symposium in Berlin, 18.-20. September 1989
1990
Didáctica de las ciencias experimentales y sociales
1990
Resumen basado en el del autor. Anexo al final del artículo Enfoque constructivista del aprendizaje o modelo de aprendizaje generativo tratando las representaciones mentales en el campo de la investigación didáctica ya que los medios de comunicación y la literatura infantil son un vehículo de penetración de estas representaciones, que a menudo son diferentes que las sostenidas por la ciencia. Uno de los campos con más representaciones es el de la vida en el pasado. Para ello se han realizado encuestas entre alumnos de primaria y secundaria pertenecientes al mismo centro. Así, se pretende clarificar cuáles son las representaciones más importantes y cómo evolucionan a lo largo del proceso edu…
Interpretación paleohidrológica y geoarqueológica del substrato romano y musulmán de la ciudad de Valencia
1990
SE ESTUDIA EL REGISTRO GEOARQUEOLOGICO, ROMANO Y MUSULMAN DE LA CIUDAD DE VALENCIA. SE OBSERVAN CUATRO NIVELES DE SEDIMENTACION DIFERENCIADOS: UN SUELO HIDROMORFO DE EPOCA PRERROMANA, LIMOS Y ARENAS DE DESBORDAMIENTO EN FACIES OVERBANK Y CREVASSE SPLAY DEL PERIODO ROMANO, ARCILLAS Y LIMOS ORGANICOS TARDO ROMANOS Y, FINALMENTE, SECUENCIAS VERTICALES DE SEDIMENTOS DE GRANO MUY GRUESO EN FACIES DE BARRAS Y DEPOSITOS DE CANAL DE EPOCA MUSULMANA. LOS DEPOSITOS DE INUNDACION DE EPOCA HISTORICA CORRESPONDEN A FASES DE PROGRADACION CONTINENTAL EN LA LLANURA COSTERA. (A)
Historia najnowsza jako przedmiot badań i nauczania
1990
Les Gaulois
1990
Sector de maquinaria. Capacidad de innovación y desarrollo regional. El caso de la Comunidad Valenciana
1990
EL SECTOR DE CONSTRUCCION DE MAQUINARIA PARA LA INDUSTRIA ES CONSIDERADO UN ELEMENTO BASICO PARA FAVORECER LA CREACION Y ADOPCION DE INNOVACIONES A ESCALA REGIONAL. EN EL CASO ESPAÑOL, ESTE SECTOR ESTA MUY CONCENTRADO ESPACIALMENTE, DEJANDO EN UNA MALA POSICION A LAS REGIONES DE DESARROLLO ENDOGENO, COMO LA COMUNIDAD VALENCIANA. LA EVOLUCION RECIENTE, SIN EMBARGO, PARECE MARCAR UN FORTALECIMIENTO DEL SECTOR DENTRO DE UN PROCESO DE CAMBIOS ESTRUCTURALES PROFUNDOS QUE PERMITAN A LAS EMPRESAS ADAPTARSE A LAS NUEVAS CONDICIONES DEL MERCADO QUE SURGEN CON LA CRISIS DE LOS 70. (A)
Anti-Inflammatory Effects of Onions: Inhibition of Chemotaxis of Human Polymorphonuclear Leukocytes by Thiosulfinates and Cepaenes
1990
Seven different synthetic thiosulfinates, and cepaene- and/or thiosulfinate-rich onion extracts were found to inhibit in vitro the chemotaxis of human granulocytes induced by formyl-methionine-leucinephenylalanine in a dose-dependent manner and at a concentration range of 0.1–100 μ<i>M</i>. Diphenylthiosulfinate showed the highest activity and was found to be more active than prednisolone. The anti-inflammatory properties of onion extracts are related, at least in part, to the inhibition of inflammatory cell influx by thiosulfinates and cepaenes.