showing 36 of ~574560 from 574555 documents
Zum Steroidhormonrezeptorenstatus kolorektaler Karzinome
1990
Zur Analyse des Steroidhormonrezeptorenstatus kolorektaler Karzinome wurde der Ostrogen- und Progesteronrezeptorgehalt von 26 aufeinanderfolgenden Tumoren bestimmt. In alien Proben lag die Estradiol-Rezeptorbindungskapazitat unterhalb des mestechnischen Cut-offs von 2 fmol/mg Cytosolprotein. In 4 von 26 Tumorproben (15%) waren Progesteron-Rezeptorspiegel zwischen 13 und 23 fmol/ mg Cytosolprotein nachweisbar. Aufgrund des Nachweises von Stero-idhormonrezeptoren in einigen Fallen und vereinzelter Berichte in der Literatur uber Remissionen unter Hormontherapie kolorektaler Karzinome scheinen weitere In-vitro- und In-vivo-Versuche angezeigt, die Hormonabhangigkeit des kolorektalen Karzinoms zu…
Use of Information from Clinical Trials for an Integrated Cancer Registry
1990
AbstractThe registry of childhood malignancies in the F.R.G. is a combination of a population-based and hospital-based cancer registry. A large amount of the collected data originates from multicenter clinical trials which are integrated into the documentation system of the cancer registry. The paper describes the information flow and the system of data storage which consists of a central database on a departmental system at the registry and of several coordinated peripheral databases on microcomputers at the trial centers. Practical experience shows an increased availability and validity of the data in the registry since the implementation of the system. Aspects of data integrity and secur…
C4 Alpha-Chain Reference Typing Report
1990
Previously it was shown that C4A and C4B alpha-chains after separation on SDS-PAGE can provide valuable information on presence and absence, as well as the number of C4A and C4B genes expressed in an individual. All samples submitted for C4 reference typing were also subjected to C4 alpha-chain separation; the results were included in the Final C4 Reference Typing List [Complement Inflamm 1990;7:193-212]. In addition, in selected cases with assumed 'reversed antigenicity', Western blots of C4 alpha-chains with monoclonal anti-C4A and B antibodies were obtained. As a result, subtypic differences of C4B allotypes were detected by the comparison of monoclonal antibodies 1217 and 1228.
1609 en el Ducado de Gandía
1990
Libros y bienes del rector Ioan Llorenç de Salaya
1990
Hut-and-tortoise: an "ecological" topos from Vitruvius in George Wither's collection of emblemes
1990
GEORGE WITHER PUBLICO EN 1635, EN LONDRES, UNA COLECCION DE EMBLEMAS. EN EL PRESENTE ARTICULO SE DESTACA LA ORIGINALIDAD DEL DECIMOCUARTO EMBLEMA DEL CUARTO LIBRO. EN EL SE VINCULA LA FIGURA DE LA TORTUGA Y LA CHOZA. LA ASOCIACION SIRVE PARA MORALIZAR LA ARQUITECTURA, PREVALECIENDO LA CHOZA RUSTICA COMO PARADIGMA PROTO-ARQUITECTONICO POR BASARSE EN LA NATURALEZA. EL TRIUNFO DE LA CONSIDERACION DE LA CONSTRUCCION ECOLOGICA ES ANALIZADO DESDE VITRUVIO; Y EL SIGNIFICADO DE LA TORTUGA EN OTROS LIBROS DE EMBLEMAS DE AUTORES COMO JUAN DE BORJA. (A. B.C./ L.A.G.)
The preparation and thermal evolution of polymeric gels with garnet stoichiometry in the CaOAl2O3SiO2 and CaOCr2O3SiO2 systems
1990
Abstract The synthesis of gels with garnet stoichiometry in the CaOAl 2 O 3 SiO 2 and CaOCr 2 O 3 SiO 2 systems and their evolution in thermal processing have been studied. Dried gels with the stoichiometry 3CaO.Al 2 O 3 .3SiO 2 show a homogeneous aspect without detectable crystalline phase. The thermal evolution of these gels indicates no formation of grossularite at temperatures up to 1000°C after 12 h. In the uvarovite garnet samples, 3CaO.Cr 2 O 3 .3SiO 2 , a small amount of crystalline phase was detected in the dried gels. The homogeneity of the gels was checked by scanning electron microscropy. The infrared study of these polymeric gels confirmed the presence of SiOMe (MeCr 3+ …
Orthogonal functions analysis of singular systems with impulsive responses
1990
Presents a systematic study using piecewise-constant orthogonal functions for the analysis of impulsive responses of singular systems. Walsh and block-pulse functions solutions are examined.
Lack of binding of gestodene to estrogen receptor in human breast cancer tissue
1990
Competition studies with progesterone and estradiol receptors of human myometrial tissue as well as of mammary cancer tissue showed that gestodene bound with high affinity to the progesterone receptor, as did other synthetic and natural progestogens. However, gestodene did not bind to the estradiol receptor. The relative binding affinities of all tested synthetic and natural ligands showed no organ-specific differences and no differences between neoplastically transformed and normal tissues.
Efectos del alcohol etilico sobre el sistema osteoarticular
1990
En el presente trabajo se estudia la osteoartropatía que presentan 25 pacientes alcohólicos crónicos, valorándola tanto a nivel clínico como radiológico. Se observa en ellos que existen alteraciones metabólicas y neuroló- gicas que pueden justificar esta osteoartropatía. Sin embargo, en algunos casos no se ha podido demostrar alteración neurológica por lo que habría que justificar la osteoartropatía únicamente por vía metabólica. No parece existir relación entre el grado de lesión neurológica y/o metabólica y la lesión radiológica, ni tampoco se relaciona ésta con la cantidad de alcohol consumido. 25 patients with chronic alcoholism are colected by the authors. They studied the osteoarthrop…
Measurement of the partial width of the decay of the Z0 into charm quark pairs
1990
A determination of the partial width Γc̄ of the Z0 boson into charm quark pairs is presented, based on a total sample of 36 900 Z0 hadronic decays measured with the DELPHI detector at the LEP collider. The production rate of cc events is derived from the inclusive analysis of charged pions coming from the decay of charmed meson D*+-→D0π+ and D*-→D̄0π- where the π± is constrained by kinematics to have a low pT with respect to the jet axis. The probability to procedure these π± from D*± decay in cc events is taken to be 0.31±0.05 as measured at √S = 10.55 GeV. The measured relative partial width Γ∞/Γh = 0.162± 0.030(stat.) ± 0.050(syst.) is in good agreement with the standard model value of 0…
Władysław Chojnacki, Wojciech Chojnacki: Bibliografia kalendarzy wydanych w języku polskim poza granicami Polski od roku 1716 (Mazury, Śląsk Górny i …
1990
Teoría y práctica cartográficas en la Valencia preilustrada (1681-1744): Las obras de Vicente del Olmo y Antonio Bordázar de Artazu
1990
Teoría y práctica aparecen con suma frecuencia disociadas en la obra de los cartógrafos españoles de los siglos XVII y XVIII. Este artículo muestra que ambas vertientes pueden encontrarse en la realizada por los miembros del denominado movimiento novator valenciano, representado en este caso por Vicente del Olmo y Antonio Bordázar. Al tiempo, pretende contribuir a su redescubrimiento como autores interesados en el desarrollo de la Cartografía entendida como disciplina técnica al servicio de las necesidades institucionales de un estado moderno.
Macrocycles as Molecular Units to Build up Electroresponsive Materials: A Comparative Theoretical Investigation of the Electronic and Optical Propert…
1990
Besides their classical and well-known applications as, e.g., dyes, pigments, catalysts, etc. [1], phthalocyanines (Pc’s) have been of particular interest in many fields of basic and applied research concerning solar cells [2], photosensitizers [3], low dimensional metals [4], gas sensors [5], electrochromism [6], Langmuir-Blodgett (LB) films [7], and nonlinear optics [8]. As an example, gas sensors [9], electronic devices [10], laser recording materials [11], and photovoltaic cells [12] can now be built from LB films of phthalocyanines. This great variety of interesting applications results from a number of unique properties that phthalocyanines exhibit On the one hand, they show an except…
Bounding Techniques and Their Application to Simplified Plastic Analysis of Structures
1990
In the framework of the simplified analysis methods for elastoplastic analysis problems, the bounding techniques possess an important role. A class of these techniques, based on the so-called perturbation method, are here presented with reference to finite element discretized structures. A general bounding principle is presented and its applications are illustrated by means of numerical examples.
Les interrelacions lingüístiques en la València doscentista. Comentaris a les aportacions de Robert I. Burns
1990
De altera Bernensis C 219, 1 sive de codicis Parisini Latini 7709 priore parte
1990
On the Real-Time Simulation and Control of the Continuous Casting Process
1990
Ll this paper we present a method for controlling in real-time the secondary cooling of the continuous casting machine. The method is based on the heat transfer model, which simulates the temperature distribution of the cast, and on the use of direct digital control (DDC). Off-line simulation results considering the control method is presented.
The conductance of lithium-7 fluoride in dioxane-water mixtures at 25�C
1990
Conductance data for lithium-7 fluoride in dioxane-water mixtures covering the range 78.35>D>36 in dielectric constant are presented. These data and other previous data on lithium-7 chloride and lithium-7 iodide were analyzed by the Fuoss 1980 conductance equation in order to find the limiting conductance Δo, the pairing distance R and the conductometric association constant Kλ. Setting Ka=Kλ/VM (where VM is the molar volume of the solvent), the thermodynamic pairing constant and the corresponding change of the free energy Δg were calculated. Correlation among the values found for R and Δg=Δh−TΔs and the properties characteristic of the ions and solvents are discussed.
Los socialistas en el País Valenciano (1939-1978)
1990
Supone un riesgo, y entraña cierta dificultad, escribir sobre nuestra realidad más reciente, máxime cuando una buena parte de los protagonistas que aparecen en esta historia son parte viva y activa de la política valenciana. Se necesita cierto valor para aventurarse, a tan pocos años de distancia, en lo que supuso el complejo panorama del socialismo al inicio de nuestra transición política, y el proceso de unidad socialista en el País Valenciano. Mi opinión es que "Los socialistas en el País Valenciano (1939-1978)" ha conseguido recoger una primera aproximación global, con objetividad, de lo que ha sido el socialismo bajo el franquismo, los primeros años de la democracia, las elecciones gen…
L'orizzonte celtico a Ravenna
1990
International audience
Microtubules and the First Cell Cycle in Cultured Mesophyll Protoplasts of Nicotiana
1990
When a protoplast is excised and cultured in vitro, an organized pattern of cell divisions must be reestablished to permit organogenesis, including plant regeneration. However, in a number of species protoplasts have proved to be very recalcitrant with regard to cell division and/or plant regeneration. In an attempt to find means to overcome the regeneration problem in recalcitrant species we are investigating the processes leading to cell division and morphogenesis in mesophyll protoplasts of the model system Nicotiana. Of particular interest are the initiation of the cell cycle and the coordination of progress through the cycles as a prerequisite for subsequent morphogenesis. Mesophyll pr…
Dose-Related Effect of Beclomethasone Dipropionate on Airway Responsiveness in Asthma
1990
The effects of twice daily inhaled beclomethasone dipropionate (BDP) at two dose levels (500 and 1,000 micrograms daily) on the airway responsiveness to inhaled histamine was evaluated by a randomized, single-blind, cross-over study in 10 patients with stable asthma. The 12-week study began with a 3-week run-in period of baseline treatment, which was continued unchanged throughout the study, and the two treatment periods were separated by a 3-week placebo period. Patients attended the laboratory every 3 weeks for spirometry and histamine inhalation tests to determine the provocative concentration of histamine causing a 20% fall in forced expiratory volume in 1 s (PC20 of FEV1). There was a …
Endor Determined Structure and Conformation of Spin-Labeled Methyl L-Phenylalanate in Frozen Solutions
1990
The conformation of L-phenylalanine and methyl L-phenylalanate acylated at the amino nitrogen position with the nitroxyl spin-label 2,2,5,5-tetramethyl- l-oxypyrroline-3-carboxylic acid has been determined by ENDOR spectroscopy and computer based molecular modeling. ENDOR spectra of spin-labeled L- phenylalanine and the corresponding methyl ester of L-phenylalanine and of their 8-fluoro and £-fluoro derivatives in perdeuterated methanol or chloroform/toluene exhibited well resolved resonance absorptions from protons and fluorines of the amino acid moiety. From the analysis of the dependence of the ENDOR spectra on Hq, we have identified principal hyperfine coupling (hfc) components of each …
New results in the volatile odorous compounds of French cheeses
1990
Les composes volatils odorants de 5 fromages a pâte persillee (3 roqueforts fabriques avec des souches de Penicillium roqueforti differentes, 1 Bleu des Causses et 1 Bleu d'Auvergne) ont ete extraits, separes par chromatographie en phase gazeuse et analyses par spectrometrie de masse. Cent vingt neuf composes ont ete identifies et quantifies
Valoración del efecto de la calcitonina en la consolidación de la fractura de Colles
1990
Se estudian cuarenta pacientes en que se ha producido una Fractura de Epífisis Distal de Radio (Fractura de POUTEAU-COLLES) en pacientes mayores de cincuenta años, con signos de osteoroporosis. Se han hecho dos grupos aleatorios de veinte pacientes. El grupo A se ha tratado con un programa de calcitonina y calcio que cubre los tres primeros meses. El grupo B es tratado exclusivamente con calcio, por igual período. En ambos la reducción e inmovilización sigue los mismos criterios. Se evalúan los resultados, observando que el grupo A presenta menos secuelas dolorosas. The authors have studied 40 patients with fracture of distal epiphysis of radius (POUTEAU-COLLES' fracture) all of them fifty …
Resonance magnetique nucleaire et chimie structurale
1990
National audience
Pays de Montbéliard: la mutation des années 80
1990
Après une remarquable montée en puissance durant les trois décennies qui suivent la Seconde Guerre Mondiale. le Pays de Montbéliard est agité par un certain nombre de turbulences économiques, démographiques et sociales.
The impact of camera perspectives on the perception of a speaker
1990
Determination of titanium by adsorption voltammetry with 4-(2-pyridylazo) resorcinol
1990
Titanium (IV) forms a complex with 4-(2-pyridylazo) resorcinol (PAR) in weakly acidic solutions. This complex can be used to determine titanium by adsorption voltammetry at a stationary Hg-electrode. The experimental conditions for the determination are described. The current-concentration curve is linear from 0.15–4.8 ng/g. Ti at a deposition time of 3 min, the detection limit lies at 0.1 ng/g. The influence of foreign ions was investigated. The determination can be carried out in the presence of a 1000-fold excess of iron by the standard addition method, albeit with decreased sensitivity.
Aldicarb residues in citrus soil, leaves and fruits
1990
Aldicarb was applied to the soil of Late Valencia orange field plots. A comparative study between four analytical methods is reported, the NPD-gas chromatography method being the best choice. The work also reports the study of accumulation and persistence of aldicarb and its biologically active metabolites in the soil, leaves and fruits (rind and pulp, separately). Residue content, at the ppb level, was found in the order leaves much greater than rind greater than pulp. Carbamate was found to accumulate mainly in its oxidized forms. Residues had reached a maximum level in about 90 days after application.
Karyotype analysis, nucleolar organizer regions(NORs), and C-banding pattern of Dicentrarchus iabrax(L.) and Dicentrarchus punctatus(Block, 1792)(Pis…
1990
Chromosomes of Dicentrarchus labrax and Dicentrarchus punctatus collected from the Gulf of Palermo are examined from kidney cells. The diploid chromosome number in both species is 2n=48. Ag-NOR and C-banding analyses revealed the presence of structural chromosomal polymorphism involving pair 1.A comparative analysis among the Giemsa, NOR- and C-banded karyotypes suggests that a close phylogenetic relationship between D. labrax and D. punctatus occurs. There are evidences for a conservative evolutionary trend in this genus.
Endorektale Sonographie zur präoperativen Beurteilung der Infiltrationstiefe von Rektumtumoren
1990
From June 1987 to February 1990, 142 out of 319 patients with rectal tumours were investigated by ultrasound scanning with the object of ascertaining the depth to which the tumour had infiltrated. This examination proved completely feasible in 130 of these patients (84 men, 46 women, mean age 61.7 [42-84] years). Postoperative histological examination revealed an adenoma (n = 59) or a T1 carcinoma (n = 19), while intrarectal ultrasonography disclosed the same findings in 79 patients (true-positive in 75 cases). A T2-tumour was diagnosed by histological examination in 24 patients, and by ultrasonography in 22 (true-positive in 18 cases). The histological diagnosis of a tumour in stage T3 or …
Spectrophotometric determination of adrenaline with an oxidative column in a FIA assembly
1990
Abstract A single channel FIA assembly is proposed for the spectrophotometric determination of adrenaline, the aqueous sample solution is directly injected into the carrier stream leading the sample through a manganese dioxide column at 80°C, and on to the spectrophotometer flow-cell. The calibration graph is linear up to 17 ppm of adrenaline. The influence of other substances has been studied and the method has been applied to the determination of adrenaline in a pharmaceutical formulation.
R. I. Burns i la frontera valenciana del segle XIII
1990
La imagen de la mujer en el Sitio de Zaragoza: Agustina de Aragón y María Agustín
1990
SE DESTACA LA IMPORTANCIA DE LAS IMAGENES VISUALES EN LA PINTURA DEL SIGLO XIX DESPUES DE LA INVASION NAPOLEONICA Y LA SUBSIGUIENTE GUERRA DE LA INDEPENDENCIA. LA PARTICULAR CONFIGURACION DE LA PINTURA DE MARIA AGUSTIN, HEROINA DEL "SITIO DE ZARAGOZA", ES EL PUNTO DE PARTIDA EN EL LIBRE USO DE LAS IMAGENES (A.B.C./ L.A.G.)