showing 36 of ~574560 from 574555 documents
Gorgone: tra mito greco e ‘recherche du bonheur’
1990
Diagnoses as Selection Criteria in Drug Trials
1990
Drug trials are needed to establish the efficacy and safety of psychopharmacological agents in clearly defined indications. When the goal of treatment is more complex than removal of an isolated symptom (“difficulty in falling asleep” or “pain”) the syndrome or clinical entity to be treated is most easily classified by way of a diagnostic label (like “depression,” “schizophrenia,” or “panic disorder”). Dimensional models have many advantages: they often fit the data better and provide a conceptual framework for a continuum in the behavior from normal to abnormal. However, they have never reached the popularity of typological models (Strauss 1973, 1975, 1986) which reflect more the medical t…
High-Resolution Nonlinear Raman-Spectroscopy in Gases
1990
0377-0486; The resolution in the Raman spectra of gases has been greatly improved by the development of the different methods of non-linear Raman scattering. When two laser beams, one of which has a tunable frequency, are focused in a sample, a stimulated Raman process occurs as soon as the frequency difference between the two lasers is equal to a Raman-active rovibrational or rotational transition frequency. The Raman resonance can be detected in different ways: by coherent anti-Stokes Raman scattering (CARS) or the corresponding Stokes process (CSRS), by a gain in one of the beams (stimulated Raman gain spectroscopy, SRGS) or a loss in the other (inverse Raman spectroscopy, IRS), or even …
Effect of cholesterol-lowering treatment with a 585 on plasma membrane function and liver electron microscope appearence in rats.
1990
Nietzsche, intérprete de Schopenhauer. La rosa y el crisantemo.
1990
Presentación, con textos y comentarios, de la imagen doble que presenta la figura y la obra del filósofo A. Schopenhauer en los textos de F. Nietzsche.
Interpretation of Structures and Fabrics Recognition and Interpretation of Fabric Patterns in Outcrop
1990
High-grade gneisses with a long and complex history have a finite ‘memory’ of past events. This memory is formed by fabric elements such as foliations, lineations, folds, mineral assemblages, boudins and sequences of intrusion. One of the aims of a geologist is to tap this memory as effectively as possible. The memory of rocks, however, is rather inadequate in that it is partly destroyed by the same events which produce the fabric elements that are recorded (Williams, 1983). Strong deformation erases older fabric elements; intrusions, recrystallisation and partial melting do the same (Figs. 1.1; 4.1). One of the purposes of this manual is to help geologists working in high-grade gneiss terr…
On One Identification Problem in Linear Elasticity
1990
In practice we meet problems, when having the solution of partial differential equation, we want to discover parts in the domain of its definition where the solution has some specific properties. In [1] and [2] the problem of identification of a curve φ, lying inside of Ω such that the flux \(\int{_{\varphi }}\frac{\partial u}{\partial n}ds\) is maximal has been studied, where u is the solution of mixed—boundary value problem for Laplacian operator.
Die Ziele der Wirtschaftspolitk
1990
Welche Zusammenhange bestehen zwischen der konkreten Wirtschaftspolitik, der Theorie der Wirtschaftspolitik und der Volks-wirtschaftstheorie? Was wird unter einer „rationalen Wirtschaftspolitik“ verstanden? Welche normativen Elemente enthalt diese?
Una nueva arqueología en manos de las filmotecas
1990
Las filmotecas acometen en los tiempos que corren una tarea semejante a la de los arqueólogos. Si todo lo que sabía a técnica parecía inmortal, la historia del cine es, en realidad, la de un proceso sistemático de destrucción compensado desde una época ya tardía por la aparición de la filmotecas. conservar, inventariar, restaurar (pasar a soporte de seguridad) son tareas imprescindibles si no queremos ver perecer parte de la memoria visual del s. XX.
Tandem mass spectrometric investigation on 17 beta-estradiol palmitate in negative ion chemical ionization
1990
International audience
On the saddle loop bifurcation
1990
It is shown that the set of C∞ (generic) saddle loop bifurcations has a unique modulus of stability γ ≥]0, 1[∪]1, ∞[ for (C0, Cr)-equivalence, with 1≤r≤∞. We mean for an equivalence (x,μ) ↦ (h(x,μ), ϕ(μ)) with h continuous and ϕ of class Cr. The modulus γ is the ratio of hyperbolicity at the saddle point of the connection. Already asking ϕ to be a lipeomorphism forces two saddle loop bifurcations to have the same modulus, while two such bifurcations with the same modulus are (C0,±Identity)-equivalent.
Determination of aniline in vegetable oils by diazotization and coupling in a microemulsion medium
1990
Abstract A microemulsion containing sodium dodecyl sulphate and n -pentanol in a mass ratio of 1 : 4, water and a vegetable oil was investigated using pseudo-tenary phase diagrams. The medium can co-solve important amounts of vegetable oils and aqueous solutions over a wide range of ionic strengths. A procedure for the determination of 1.4–140 μg ml −1 of aniline in vegetable oils using ionic diazotization and coupling reactions was developed. The absorbance was measured in an optically clear microemulsion containing 4% or 20% of oil. The procedure is much simpler and rapid than the official chromatographic methods and gives almost the same limits of detection (ca. 05 μg ml −1 ) using no mo…
Философия: Проблемы становления современной личности
1990
Своеобразие работ, объединенных в настоящем сборнике, состоит в том, что становление и формирование личности рассматривается в них вопреки широко распространенной традиции, преимущественно не как управление личностью, а как инициативное самодвижение личности, как происходящий в сложном взаимодействии с множеством внешних факторов процесс освобождения и самоутверждения личности в этом противоречивом мире.
Violencias feudales en la ciudad de Valencia
1990
Hypercholesterolemia and haemostatic function changes
1990
Patients with hypercholesterolemia have elevated levels of LDL and reduced plasma concentration of HDL.
A simple method for estimating downward longwave radiation from surface and satellite data by clear sky
1990
Abstract An attempt to derive downward longwave radiation at the surface in clear sky conditions is presented. A method that integrates satellite-measured infrared radiation temperatures with ground measurements of water vapour pressure is applied to Meteosat data. Satellite-derived fluxes are compared with corresponding ground-measured fluxes at three different sites in France and during various seasons. Comparison of the daily averaged fluxes shows a correlation coefficient of 0–88 and an r.m.s. difference between satellite estimates and ground measurements of 12 Wm-2.
Multiple SIP strategies and bottom-up adorning in logic query optimization
1990
Preprocessing methods called “readorning” and “bottom-up adorning” are introduced as means of enlarging the application domain of magic sets and related query optimization strategies for logic databases. Readorning tries to make possible the simultaneous use of multiple sideways information passing (sip) strategies defined for a rule, thus yielding an optimization effect that may not be achieved by any particular choice of sip strategies. Bottom-up adorning is used to make magic sets applicable to cases in which potential optimizations can be derived from bindings coming upwards from rule bodies to rule heads in bottom-up evaluation. These include the cases in which we know that some base r…
Una interpretación Biomecánica sugestiva para la Escoliosis Idiopática
1990
Características Histológicas del Menisco de la rodilla durante el Desarrollo Intrauterino de la rata
1990
Con el objetivo de profundizar en el conocimiento del desarrollo embriológico del esbozo meniscal de la rodilla, los autores realizan un estudio en embriones de rata de 16 y 20 días de gestación. Se comprueba como este esbozo meniscal, que en su inicio esta formado por una masa de células mesenquinales, adopta una configuración triangular al corte frontal, situada entre las dos superficies articulares. Posteriormente su vértice experimenta diferenciación cartilaginosa (futuro menisco), mientras que la región periférica sigue siendo altamente vascular y se continúa con tejido conjuntivo fibroso (zona parameniscal). An study in embryos of rat betwen 16-20 days of pregnancy was made to show th…
Polyenolates of unsaturated carboxylic acids in synthesis. A straightforward synthesis of retinoic acids.
1990
Abstract Retinoic acids are prepared in a two step procedure by addition of lithium trienediolates of sorbic acid and 3-methyl-sorbic acid to β-ionone.
Chloramphenicol effects on adventitious root production by radish hypocotyls
1990
Abstract The excision of the root accelerates greatly the formation of adventitious roots in the hypocotyl of etiolated radish seedlings, but if the seedlings develop in CAP 1×10−4M, no adventitious root are induced after cutting. IAA either alone or associated with CAP, significantly increases the number of primordia in normal hypocotyls if given at the moment of cutting, while it has not stimulatory effect on the hypocotyls of seedlings grown in CAP. IAA has significant effect on both elongation and tickening of hypocotyl segments prepared from seedlings grown in CAP, and this could indicate a specific action of the inhibitor either on a particular process or on particular cells. The endo…
A parasitoloxia e a doutrina do contáxio animado: a helmintiase e a sarna na España do século XIX
1990
Les explicacions parasitològiques del contagi eren tant teòriques com observacionals. La triquinosi, la sarna i la helmintiasi van ser exemples primerencs que van demostrar un contagi viu. A principis del segle XIX, en la medicina espanyola, igual que en la medicina europea, es rebutjava el contagi animat excepte en el cas d'alguns paràsits animals com la sarna. En uns altres, com en la helmintiasi intestinal, s'acceptava el seu origen viu, però no la seua contagiositat, i es defensava la seua generació espontània fins a ben entrat el segle XIX. En el “Diccionari de Ciències Mèdiques”, l'estudi dels cucs és quasi exclusivament morfològic i es defensa com a causa de la seua presència en l'ho…
Interrupción de Aferencias propioceptivas a nivel de la segunda neurona inducen escoliosis: Estudio experimental en ratas
1990
El propósito de este trabajo es valorar el comportamiento del raquis, en un modelo experimental con ratas, tras producir una lesión a nivel del núcleo gracilis. Un total de 20 animales de 5 semanas de edad fueron usados en nuestro estudio. Las lesiones fueron realizadas en el lado derecho. Del total de 15 animales con lesión, todos presentaron lesión histológica, 5 de estos desarrollaron curvas escolióticas (33.3%) con una media de 14.8-Cobb (9-20) y cifosis de 40.4-Cobb (38-42). Nuestros datos sugieren que el núcleo gracilis puede estar implicado de algún modo en el desarrollo de la escoliosis. The aim of this study wa s to investigate if damage of gracilis nucleus could bring about scolio…
A new species of the genusCrassicaudaLeiper et Atkinson, 1914 (Nematoda: Spiruroidea) from the penis ofGlobicephala melas(Traill, 1809) (Cetacea: Glo…
1990
The examination of a male long-finned pilot whale (Globicephala melas) stranded at Cullera (Spanish Mediterranean coast) resulted in the finding of nematodes of the genus Crassicauda parasitising the penis. Pathologies associated with these worms were observed and are described here. The morphometric and morphological study of these helminths revealed that they represent a new species, Crassicauda carbonelli n. sp., which differs from other species of the genus Crassicauda in body size, cephalic morphology and spicule size in the males. Crassicauda sp. described by Dollfus (1968) must be ascribed to C. carbonelli n. sp. The taxonomy, morphometric variability of the eggs, site in the hosts, …
Les ostracodes paléocènes du Niger: taxinomie — un témoignage de l'existence éventuelle de la mer transsaharienne?
1990
Resume L'ostracofaune de Paleocene superieur dans huit sites du Niger a livre 44 especes. Treize sont proposees comme especes nouvelles: Acanthocythereis niameyensis, Argilloecia? mentesensis, Bythocypris fosteralii, Buntonia pyriformis, Cytherelloidea musacea, Cytherelloidea signoidalis, Eocytheropteron trapezoidalis, Hermanites chadaouankaensis, Hermanites tahouaensis, Isohabrocythere langi, Paracosta transsaharaensis, Quadracyathere kaoensis, Schizocythere nigeromeridionalis, Uroleberis uppsalaensis. Quatre sont laissees en nomenclature ouverte. Un nouveau sousgenre Alocopocythere (Isalocopocythere) est egalement propose. Cette faune de caractere infralittoral, localement Circalittoral, …
Asymptotical Convergence Evaluation for a Parabolic Problem Arising in Circuit Theory
1990
Mapping in Gneiss Terrains
1990
Whatever the purpose of working in gneiss terrains, a prerequisite for success is a thorough understanding of the geometry and relative age relations of rock units and the sequence of deformation and metamorphism. Because of the three-dimensional complexity of deformation and intrusion relations in gneiss terrains, it is in most cases impossible to understand relations by visiting a single outcrop, or even by means of a small number of transects through the area under consideration. If no detailed geological maps are present, or if the subject of study is insufficiently dealt with on available maps, it will be necessary to map an area in some detail.
Urethral Tumor Recurrences after Radical Cystoprostatectomy: The Case for Primary Cystoprostatourethrectomy?
1990
Of 273 male patients who underwent radical cystoprostatectomy between 1967 and 1987, 22 were regarded as at risk for urethral recurrence. These patients underwent simultaneous primary urethrectomy or urethrectomy shortly after cystectomy because of the histology of the cystectomy specimen. Of the remaining 251 patients a urethral recurrence was observed in 23 (9.2%). A patient with a urethral recurrence originally had undergone an operation at another hospital. The first urethral tumor recurrence was observed in 1977 but between October 1987 and May 1988, 7 patients were treated for an initial or secondary urethral recurrence. This finding suggests that the rate of urethral recurrence incre…
I confini dell'identità. Un caso di comunicazione paradossale nella Sicilia greca arcaica
1990
Contro l'opinione corrente che vede la colonizzazione come occasione per costruire una rappresentazione storiografica e una memoria culturale della superiorità dei Greci colonizzatori rispetto agli indigeni, si prende in esame un caso eccezionale di coloni Greci scacciati da altri Greci e "soccorsi" dai Siculi indigeni con una procedura che rimette in gioco i confini e gli spazi dell'identità etnica.
El microscopi de Mazzi
1990
Integrability Conditions: Recent Results in the Theory of Integrable Models
1990
This paper reports various results achieved recently in the theory of integrable models. These are summarised in the Fig.1! At the Chester meeting [1] two of the authors were concerned [1] with the local Riemann-Hilbert problem (double-lined box in the centre of Fig.1), its limit as a non-local Riemann-Hilbert problem used to solve classical integrable models in 2+1 dimensions (two space and one time dimensions) [2,3], and the connection of this Riemann-Hilbert problem with Ueno’s [4] Riemann-Hilbert problem associated with the representation of the algebra gl(∞) in terms of Z⊗Z matrices (Z the integers) and the solution of the K-P equations in 2+1. We were also concerned [1] with the const…
Blood CO2 and pH Transients During Apnoea after O2 Breathing in Patients
1990
Endotracheal intubation always is combined with an apnoea the duration of which is dependent on the technique used, the skills of the intubator, and the anatomical situation. The resulting typical potential risks may be (among others) both hypoxaemia and hypercapnia. Therefore the tolerable apnoea time for an intubation procedure is limited in clinical practice to 1 – 2 minutes. It must be noted that the developing hypercapnia is inevitable, whereas hypoxaemia may be avoided even in prolonged apnoea (e.g. >2 min) with “adaequate” preoxygenation [Duda et al., 1988]. Using de-nitrogenation techniques (breathing pure oxygen for 30 to 60 min) “anaesthetized and curarized normal subjects tolerat…
Fizikas un matemātikas zinātņu doktors Arnolds Lepins: biobibliogrāfiskais rādītājs
1990
Biobibliogrāfiskajā rādītājā ietverti fizikas un matemātikas zinātņu doktora profesora Arnolda Lepina publicētie darbi no 1952.gada līdz 1991.gadam, kā ari uzrādīta literatūra par viņu.
El estudio de las aguas de un medio natural
1990
Polychlorinated phenols and their metabolites in soil and earthworms of sawmill environment
1990
Abstract Topsoil and earthworm samples collected from three Finnish sawmill environments were analysed for polychlorinated phenols, 2,3,4,6-tetrachloro- and pentachlorophenol, and their metabolites. Analyses were carried out by gas chromatography/mass spectrometry using a selected ion monitoring technique and by dual-channel gas chromatography using quartz capillary columns and two electron capture detectors. The total chlorophenol concentrations ranged from ca. 260 to 480 μg/g (dry weight) in soil and from ca. 140 to 3500 μg/g fat in earthworms. The most important metabolites in soil were chlorinated dihydroxy-benzenes (also at ppm level); only traces of chlorinated anisoles were detected …