showing 36 of ~574560 from 574555 documents
Baskets, Ecorisk and Ecotoxa
1988
Abstract BASKETS, ECORISK and ECOTOXA are microcomputerizable systems for preliminary environmental risk evaluation for chemicals. They give numerical values which are useful for further risk assessment. Lists of the BASIC programs are available upon request.
CONFISCA NEL DIRITTO TRIBUTARIO
1988
L'INDAGINE INTENDE INDIVIDUARE LA NATURA DELLA CONFISCA NEL DIRITTO TRIBUTARIO, ATTRAVERSO L'INDIVIDUAZIONE DELL'INTERESSE GIURIDICAMENTE PROTETTO NELLE FATTISPECIE DISCIPLINATE DAL DIRITTO POSITIVO
Computertomographie und Kernspintomographie bei nicht tumorbedingten raumfordernden intrakraniellen Prozessen
1988
Zahlreiche, nicht tumorbedingte raumfordernde Prozesse fuhren zu tumorahnlichen oder -identischen Darstellungen in der computertomographischen und kernspintomographischen Bildgebung. Die artspezifische Diagnose ist in vielen Fallen allein aus der Bildinterpretation nicht zu stellen. Selbst wenn die Anamnese und klinischen Befunde zur Urteilsfindung herangezogen werden, konnen Fehlinterpretationen unterlaufen. Gerade im Hinblick auf eine zielsichere Indikationsstellung fur einen neurochirurgischen Eingriff und die Wahl des chirurgischen Vorgehens ist aber eine moglichst exakte praoperative Artdiagnose erforderlich. Im Einzelfall mus also das gesamte Repertoire der Neuroradiologie ausgeschopf…
Analysis of the Lepton Mixing Matrix from Neutrino Oscillation Experiments
1988
An analysis of experimental results in the framework of simultaneous oscillations of three neutrino flavours is used, in a combined fit, to constrain the elements of the 3×3 unitary lepton mixing matrix and to obtain limits on the three lepton mixing angles αeμ αeτ and αμτ. No evidence for mixing is found.
Covariant Operator Formalism for Quantized Superfields
1988
The Takahashi-Umezawa method of deriving the free covariant quantization relations from the linear equations of motion is extended to superfields. The Cauchy problem for free superfields is solved, and an expression for the time independent scalar product is given. For the case of interacting fields, we give the general Kallen-Lehmann spectral representation for the two-point superfield Green functions and, after the introduction of the asymptotic condition for superfields, we give the superfield extension of the Yang-Feldman equation. The case of the D = 2 real scalar superfield and the case of the D = 4 chiral superfield are discussed in detail.
Mecanismo de producción de los quistes artrósicos : estudio morfológico sobre 19 cabezas femorales artrósicas
1988
19 osteoarthritic femoral heads obtained during total hip replacement procedure were studies. Photography, x-ray with mamograph and optical microscopy were then carried out. The authors analysed osteoarthritic cysts at different stages of development. By successive cuts they were able to demonstrate the communication of the cyst itself with the joint cavity. The authors believe that the filtration of synovial fluid in the subchondral bone might stimulate the proliferation of conjuntival cells.
Tratamiento quirúrgico de las fracturas de tobillo en jóvenes deportistas
1988
Presentamos 45 jóvenes deportistas intervenidos por fractura de tobillo. Se revisan los mecanismos fracturarios y los resultados obtenidos con el tratamiento quirúrgico.
Gobierno político y luchas sociales : estrategias de poder del patriciado urbano : la ciudad de Valencia (1356-1419)
1988
Electronic properties and crystal structure of aqua (mepirizole-oxalato)copper(II)monohydrate: [Cu(C11H14N4O2)C2O4·H2O]H2O
1988
Abstract A Cu(ll) complex with mepirizole: 4-methoxy-2-(5-methoxy-3-methyl-pyrazoll-yl)-6-methylpyrimidine (L) and oxalate as ligands with the formula [CuL(C2O4)(H2O)]·H2O has been synthesized. The crystal structure has been determined by X-ray diffraction analysis: monoclinic, space group P21/n, Z = 4, a = 7.707(1), b = 14.951(3), c = 14.986(2) A,β = 92.40(2)°, V = 1725.2(8) A3, Dm = 1.61(1) g cm−3, Dc = 1.62 g cm−3, R = 0.032 and Rw = 0.035 for 2016 observed reflections. The CuN2O2O′chromophore can be described as square pyramidal strongly distorted towards trigonal bipyramidal. The basal coordination positions are occupied by the two oxygen atoms of the bidentate oxalate group, the coord…
Loss of Contact-Dependent Inhibition of Growth in Chemically Transformed Fibroblasts
1988
The plasma membrane has been recognized as an important regulatory unit of mammalian cells during determination, differentiation, and social behaviour of individual cells within various tissues (1–4). On the molecular level, plasma membrane glycoproteins and glycolipids have been shown to be involved in these processes (1–4). Density-dependent growth of non-transformed cells in vitro has been proposed to be regulated by secreted inhibitory compounds (5–7), by the cell’s shape (8) or by diffusion boundary layers (9). On the other hand, specific cell-cell interactions via cell membrane molecules were found to be of great importance for the contact-dependent inhibition of growth (10–16) and co…
Climate Zones of China
1988
Note: The climate zones respectively climate types, according to the climate regionalization scheme of Huang Bing-wei (1986), were described with particular reference to the major climate characteristics and their variation over space and time. Each climate zone also contains a climate map of China, showing distinctly the spatial distribution of the climate zone concerned. A climate diagram for a representative station was added which expresses the annual variation of precipitation and temperature, based on long-term monthly means.
About the finite convergence of the proximal point algorithm
1988
We study the finite convergence property of the proximal point algorithm applied to the partial inverse, with respect to a subspace, of the subdifferential of a polyhedral convex function. Using examples we show how sufficient conditions providing the finite convergence can be realized and we give a case with non finite termination.
Osteonectin Expression in Odontogenous and Non-odontogenous Tumors and Tumor-like Lesions of the Skull and Jaw Bones
1988
The organic matrix of osseous and odontogenic tissues is formed mainly by collagen type I. In addition there is a considerable bulk of noncollagenous proteins (Prince et al. 1987) in bone among which osteonectin represents the greatest amount. This protein, first isolated by Termine et al. (1981) has a molecular weight of 29 kD and possibly is involved in the mineralization process of collagenous fibrils in bone (Romberg et al. 1985). Recently osteonectin could be demonstrated in bone tumors and normal bone and has been considered as a marker for bone tumor cells (Schulz et al. 1985; Jundt et al. 1987). The aim of the present study was to examine the expression of osteonectin in odontogenou…
Die Bedeutung von Entzündungsmediatoren für Entstehung und Therapie der fibrosierenden Lungenerkrankungen
1988
Das Verstandnis der Immunpathogenese der fibrosierenden Lungenerkrankungen hat durch die Arbeiten mit dem Material aus der bronchoalveolaren Lavage enorm zugenommen, und man hat pathogenetische Konzepte fur die einzelnen Krankheitsbilder entwickelt. Erstaunlicherweise ahneln sich diese Konzepte sehr, unabhangig davon, ob es sich um fibrosierende Lungenerkrankungen bekannter oder unbekannter Atiologie handelt. Die bronchoalveolare Lavage ist ein wertvolles Instrument zur Erforschung dieser Krankheitsbilder, da man zeigen kann, das den Veranderungen im Lungengerust eine Alveolitis parallel geht oder gar vorauseilt. Die Zellen der Alveolitis lassen sich durch die bronchoalveolare Lavage einfac…
Les paysans de la Haute-Marne et la Révolution française. Recherches sur les structures dela communauté villageoise
1988
Electrophysiological Analysis of Effects of Exogenous and Endogenous Adenosine in Hippocampal Slices
1988
Little doubt remains that adenosine serves a modulatory role in the nervous system (Sattin and Rail, 1970; Shimizu and Daly, 1970; Fredholm and Hedqvist, 1980; Phillis and Wu, 1981; Stone, 1981; Daly et al., 1984; Dunwiddie, 1985). While electrophysiologically active concentrations of adenosine have been found in the extracellular fluid, the source and control of the levels of this active adenosine are unclear. There are indications that adenosine is released (or coreleased) from synaptic endings, fulfilling a typical transmitter role (Burnstock, 1975, 1981; Nagy et al., 1986). A synaptic hyperpolarization in autonomic neurons has been identified as an adenosine-mediated potential (Akasu et…
A clear sky atmospheric model valid for the mediterranean zone
1988
Abstract The ASHRAE clear sky model in the version proposed by G.L. Powell has been applied to a set of clear days from two coastal locations of Yugoslavia. The results have provided further elements to confirm the existence of a clear sky atmospheric model valid for the whole Mediterranean zone. This model is characterized by values of the atmospheric extinction coefficient higher than the corresponding ASHRAE ones with upper limits defined by the regression curve derived by using data of Palermo.
Algorithms on Graphs
1988
In this chapter we shall develop some basic algorithms for directed graphs and relations which will be of use in later chapters, where the efficient construction of parsers is considered. The constructions needed can be expressed as the computing of certain “relational expressions”. These are expressions whose operands are relations and whose operators are chosen from among multiplication, closure, union and inverse. For this purpose we need to develop an algorithm for computing the closure of a relation. In view of the nature of our applications, the most appropriate way to do this is by a depth-first traversal of the graph that corresponds to the given relation. Other ways of computing th…
Mesure et analyse de l'égalité et de l'équité en éducation
1988
Analysing and measuring equity in the education system has been the bread and butter of large number of sociological pieces of research. They are often based on the computation of selectivity indices (according to SES sex...) at given level of education higher education for example. The paper shows that these measures ignore the scarcity of resources existing in the education system. More precisely they ignore the structural dimension of the overall school organization allocation of resources between levels on the one hand quality choices at each level on the other which constitutes the shell itself more or less equalitarian within which are nested the various types of selectivity as they a…
Europe or the cultural imperative
1988
Se desconoce si el texto fue publicado en esta versión y en lengua inglesa, pero a excepción de los dos primeros párrafos, recoge prácticamente el artículo titulado "Dos países en la acción cultural europea", publicado en: Consejo de Europa (1988). I Encuentro. Diálogo Cultural Hispano-Alemán en el marco de la política cultural europea. Santillana del mar, 27-28 de mayo de 1988. Madrid: Fundación Santillana.
La idea de mente en la crítica de la razón pura
1988
La idea de la mente (Gemüt) hace referencia a esa "facultad radical" de la cual fluyen la sensibilidad y el entendimiento. Propuesta como un "sujeto pensante" por el dinamismo de la razón discursiva, constituye un principio problemático que trasciende la experiencia categorialmente constituida. Sin embargo, es aprehendida por el "sentido interno", traicionada por el sucesividad temporal de los fenómenos. Pensada como una "identidad oculta" que subyace a todas las representaciones, es la idea "regulativa" que sistematiza la razón pura teórica.
Modificaciones radiográficas de la extremidad proximal del fémur «sano» en pacientes afectos de síndrome de Legg, Calvé, Perthes (SLCP) unilateral
1988
The authors analyse the morphological variations at the proximal extremity of the Femur, theoretically hale in patients with Legg-Calvé-Perthes Syndrom unilateral. This study was carried out in 200 radiographic controls made in 50 cases of LeggCalvé- Perthes Syndrom unilateral, and another group of 200 patients without affectation of the hip joint by systemic or local process. This was the control group.
Nota sobre población, derechos feudales y control de la producción agrícola en la ribera del Xúquer a finales del antiguo régimen
1988
En la mayoría de señoríos valencianos, además de la posesión de la jurisdicción, el titular disponía de una serie de derechos sobre la tierra, regalías y otras facultades preeminentes propias del modo de producción feudal. Los señores obtenían además ingresos procedentes de los derechos de monopolios; en ocasiones disfrutaban también de derechos pertenecientes teóricamente a la Corona o a la Iglesia. La encuesta que se presenta arroja información sobre el peso de las cargas feudales en distintos núcleos de la Ribera del Xúquer.
Asignación de recursos y estructura de gastos en la universidad
1988
National audience
Introducción a Nietzsche. Antología
1988
Introducción general a la obra de F. Nietzsche, al estado de las traducciones de ella en castellano, con la justificación del papel de la antología propuesta, con una extensa cronología de la vida del pensador y una selecta bibliografía internacional.
Inverse-voltammetric determination of bismuth in biomaterials with computer assisted peak evaluation
1988
The inverse-voltammetric determination of low bismuth concentrations in a 1 mol/l HCl as supporting electrolyte was investigated with regard to optimal working conditions. New and old types of mercury-drop electrodes and mercury-film electrodes were compared concerning their sensibility, selectivity and interferences. With both electrodes the determination of 0.1 μg/l to 0.01 μg/l bismuth is possible. The influence of a large excess of copper and antimony on the inverse-voltammetric determination of bismuth was studied in detail.
Reductive transformations - 11. stereoselective cycloannelation and bridging of the cyclooctatetraene dianionMakromol. Chem., Rapid. Commun. 1988, 9,…
1988
Abstract Bifunctional electrophiles with C4-, C6-, and C8-chains are reacted with the cyclooctatetraene dianion to selectively give novel cycloannelation and bridging products which possess a surprising stereochemistry and are useful starting compounds for further syntheses.
Carlos III y la legislación sobre universidades
1988
Sobre actividades jurídicas y legislativas en España durante la Ilustración.
Etude des composes volatils de l'arome de fraises
1988
130 ref. *INRA Unite Regionale de Documentation, B.V. 1540, 21034 Dijon Cedex Diffusion du document : INRA Unite Regionale de Documentation, B.V. 1540, 21034 Dijon Cedex Diplôme : Dr. d'Université
Geomorfología y colonización vegetal en ramblas de zonas calcáreas: el Saltador de la Rambla de la Viuda
1988
Las ramblas mediterráneas constituyen un sistema fluvial y un ambiente ripario interdependiente y coherente con el régimen torrencial y espasmódico de la escorrentía. En el corto trayecto de medio kilómetro aguas debajo del Saltador de la Rambla de la Viuda se pone de manifiesto la interconexión de los rasgos geomorfológicos y sedimentarios con la dinámica de la colonización vegetal. Los resultados fitogeomorfológicos permiten un reconocimiento cualitativo del funcionamiento hidrológico de la rambla. El método de trabajo (transectos fitogeomorfológicos integrados a microescala) se revela adecuado para evaluar las interrelaciones de los sistemas biótico, hidrológico y geomorfológico.
Modular representation theory and pi-algebras
1988
(1988). Modular representation theory and pi-algebras. Communications in Algebra: Vol. 16, No. 10, pp. 2043-2067.
1,4-regioselective iodofunctionalizations of 1,3-butadiene
1988
Abstract Addition reactions of benzene and acetonitrile to 1,3-butadiene are described. This new iodofunctionalization process proceeds “via” iodonium ion-allylic cation equilibrium and gives regioselectively 1,4-adducts, which can be alternatively obtained by acid treatment of the 1,2-derivative 8 .
Ultrasonography and alpha-fetoprotein in diagnosis of hepatocellular carcinoma in cirrhosis
1988
The accuracy of ultrasound (US) and alpha-fetoprotein (AFP) in the diagnosis of hepatocellular carcinoma (HCC) in 363 patients with cirrhosis (C) and a clinical suspicion of HCC was assessed. The ultrasonographic patterns of HCC and their relationship with AFP values were analyzed. Echographic patterns were distributed as follows: 47 patients had sonodense lesions; 30 patients had hypoechoic lesions; 47 had mixed-pattern lesions, and in four patients focal dilated intrahepatic bile ducts were demonstrated. The sensitivity of US was 90%; specificity was 93.3%. Serum AFP level greater than or equal to 500 ng/ml (RIA) was the first clue to the diagnosis in 71 patients (48.6%); specificity was …