showing 36 of ~574560 from 574555 documents
Excitation Transport in Helical Proteins
1994
Recent results for excitation dynamics in and IR-absorption spectrum of helical polypeptides are briefly reviewed.
Novel Phases in the V-P-O Catalytic System from Oxovanadium Hydrogenphosphate Precursors
1994
ABSTRACTSeveral biphasic VOP04/(VO)2P2O7 redox partners seem to be active in the catalytic cycles involved in the mild oxidation of simple hydrocarbons to maleic anhydride. The present X-ray time resolved thermal-diffractometric study reveals the existence of a new anhydrous variety of the oxidized form, ω-VOPO4, which may appear as an intermediate in the formation of the well known β-VOPO4. This new phase only remains well crystallized at relatively high temperatures, and when it is allowed to cool down in wet air VOPO4·2H2O results. In turn, another well defined phase, VOPO4·1.58H2O, can be recognized in the course of the hydration process.
Consideraciones a propósito de los incendios forestales en la provincia de Valencia
1994
Referencias documentadas sobre los incendios forestales en la provincia de Valencia desde el periodo 1930-1959.
Double index recursive models
1994
The purpose of this document is to study the model belongs to the family of structural equation models with data varying both accross individuals (sectors) and in time. A complete theoretical analysis is developed in this work for the case of a recursive structure. Maximum likelihood estimation and Zellner's "seemingly unrelated equations" estimators (iterated or not) are presented and their asymptotic properties are carefully derived.The application of the estimation methods to the economy morocco produced statistically significant and economic meaningful results. Through a test of exogeneity, the recursivity of the system is confirmed. Policy recommendations are discussed and analyzed.
Le choc de la naissance : une réalité à ne pas oublier
1994
International audience
Layer-by-Layer Adsorption: The Solid/Liquid-Interface as a Template for the Controlled Growth of Well-Defined Nanostructures of Polyelectrolytes, Pro…
1994
This report describes the construction of ultrathin films whose structure can be tailored on the molecular scale. The resulting supramolecular film architectures may include functional biological macromolecules such as proteins or polynucleotides. The average distances of two functional layers can be adjusted on the nanometer scale (from less than lnm to several tens of nanometers), with a precision of approximately 0.1 nm. This control is achieved by varying the number and the thickness of the polyelectrolyte interlayers and requires the capability of steering each adsorption step with high accuracy. A crucial factor is the fabrication and manipulation of the film surface at each adsorptio…
Skeletal Muscle Collagen Type 1 mRNA, Prolyl-4-Hydroxylase and Hydroxyproline after Prolonged Physical Training in Hypobaric Hypoxia
1994
A phase I-II study of cyclophosphamide, epidoxorubicin, levofolinic acid/5-fluorouracil and recombinant human granulocyte colony stimulating factor i…
1994
Thirty patients with measurable metastatic breast carcinoma were treated with a combination of cyclophosphamide 600 mg/m2 on day 1, levofolinic acid 100 mg/m2 plus 5-fluorouracil 375 mg/m2 on days 1-3, and epidoxorubicin (EDXR) in three refracted doses on days 1-3 with G-CSF rescue for 10 days. In the phase I part of the study, groups of 3 patients received EDXR 20, 25, 30, 35, and 40 mg/m2/day until the dose limiting toxicity (DLT) was reached. At the dose of 40mg/m2/day prolonged grade 4 leukopenia, severe proctitis, and grade 3 diarrhea represented the DLT. All subsequent partients were treated at the maximal tolerated dose of EDXR (35 mg/m2/day). In the group of 18 patients treated at 3…
Oncogene overexpression in non-small-cell lung cancer tissue: prevalence and clinicopathological significance.
1994
In contrast to small-cell lung cancer, few data are available on the role of oncogene overexpression in non-small-cell lung cancers (NSCLC). To determine the prevalence and extent of the transcriptional activation of cancer genes in NSCLC we investigated the level of mRNA of the three important cellular oncogenes — erbB2, Ki-ras, and c-myc — in 39 surgically or endoscopically obtained tumor samples and 24 samples of normal bronchopulmonary tissue taken from the same patients. Tissue RNA was prepared and the specific mRNA analyzed by the highly sensitive nuclease S1 protection assay. Oncogene mRNA in the tumors was quantified by comparison with the homogeneously weak signals in normal lung t…
Tętniak aorty brzusznej powikłany przetoką do żyły głównej dolnej
1994
IL NEUROBLASTOMA
1994
Gli Autori evidsenziano le caratteristiche clinice e terapeutiche del Neuroblastoma.
Les magistrats et l'histoire à l'audience solennelle de rentrée
1994
Advances in Handwriting and Drawing: a multidisciplinary approach
1994
Choix de communications faites à la sixième Conférence internationale sur l'écriture manuscrite et le dessin, Paris, juillet 1993, organisée par l'ENST et l'URA 820 du CNRS; International audience
Utilització de l'ordinador com a eina de suport per a l'adquisició de la lecto-escriptura. Aplicació del programa Llapis-3.
1994
Descripció de l'aplicació d'un programa informàtic de suport a l'aprenentatge de la lectura i l'escriptura, en un centre amb programa d'immersió lingüística. Els principals objectius en la comunicació són: Presentar diferents possibilitats d'utilització de l'ordinador dins de l'aula. Tractar diversos aspectes didàctics que cal treballar-ne. Y descriure les característiques del programa informàtic utilitzat: Llapis-3.
La monarquía hispánica vista desde la Corona de Aragón
1994
Encontre interdisciplinari. Malaltia i cultura/Disease and culture
1994
The first of these conferences was held in Valencia on the 17-18th June 1994 taking as a subject of discussion the relations between Disease and Culture. A selected group of fourteen specialists in the fields of anthropology, social history, demography, paleopathology and history of science and medicine from the universities of Oxford, Bologna, Pavia, Venezia, Valencia, Alacant, Autonoma de Barcelona, Granada and Tarragona joined in the Palau de Pineda, site of the Universidad Internacional Menendez y Pelayo. The meeting was coordinated by Josep Lluls Barona with the collaboration of the Department of History of Science (Universitat de Valencia), Universidad Internacional Menendez Pelayo, T…
Kämnerinoikeudet Suomen kaupungeissa suurvalta-ajan alkupuolella (noin 1620-1660)
1994
L’ordine dei Giudice di rimessione in pristino per la violazione delle norme sulla tutela ambientale
1994
La cultura del Omphalos: una reflexión sobre poesía y poéticas
1994
Los mozos nobles: Grandes hombres, si fueran hijos solos
1994
Comportamiento biológico intraarticular de distintos aloinjertos tendinosos: estudio experimental
1994
Se ha efectuado un estudio experimental comparativo, con valoración macro y microscópica, de la supervivencia, dentro de la articulación de la rodilla del conejo, de tendones flexores sobre extensores y dentro de estos, entre tendones conservados en fresco, congelados, liofilizados y fijados en solución de glutaraldehido al 0,2%. Los tendones se mantuvieron libres en la articulación receptora durante periodos distintos de tiempo. Entre los resultados destaca la pérdida de volumen, en el tiempo, de la masa tendinosa (18% de despariciones totales, con un 28% de pérdida final global). Los tendones fijados en glutaraldehido fueron los que presentaron menor pérdida de volumen. Los tendones impla…
Somatic Hybridization in the Family Apocynaceae (Catharanthus, Rauwolfia, Rhazya, and Vinca Species)
1994
The Apocynaceae family includes about 2000 species belonging to approximately 200 genera (Takhtadjan 1981). The majority of species originate in the tropics, only a few of them are common to Europe (Vinca minor, V. herhaceae, V. major, genus Trachomitum).
Head and Body Coordination during Locomotion and Complex Movements
1994
Publisher Summary This chapter discusses theory in which it is argued that during complex movements, the head is stabilized intermittently under the control of gaze, and that this stabilization allows the head to serve as an inertial guidance platform for the control of multilimb movement. The otolithic organs, sacculus and utriculus, are inertial detectors of linear acceleration of the head in the plane of their macula. It is well established that in normal gravity conditions, although the perceived gravitational vertical deviates from the objective vertical by a few degrees, gravitational reference is used not only for posture but also for perceptual tasks that involve orientation in spac…
A multicenter randomized controlled trial of recombinant interferon-α2b in patients with acute transfusion-associated hepatitis C
1994
To assess whether interferon-α might prevent non-A, non-B hepatitis from becoming chronic, 45 consecutive patients with transfusion-associated hepatitis were enrolled in a randomized clinical trial. Thirty-eight patients had hepatitis C virus infection, and 7 had non-A, non-B, non-C hepatitis. Twenty-six patients (22 with HCV) were given 3 MU of recombinant interferon-α2b three times a week for 12 wk, whereas 19 (16 with HCV) were not. Biochemical and virological parameters were monitored at regular intervals during an 18-mo follow-up. At the end of the 3-mo therapy, 16 (73) patients with hepatitis C had normal serum ALT activity, compared with 7 (44) who were not treated (NS). Fifty-three …
La artroscopia de rodilla: experiencia de 474 casos
1994
El objetivo de este trabajo es dar a conocer los resultados de un estudio de 474 artroscopias realizadas en nuestro Servicio de Cirugía Ortopédica y Traumatología desde el mes de enero 1988 hasta agosto 1992. La edad media de los pacientes fue de 32 años, con una mayor incidencia en el sexo masculino (73%). La patología más frecuente correspondió a la meniscopatía interna (48%). Tuvimos una estancia media hospitalaria de 3 días, apreciándose una relación inversa entre ésta y la edad del paciente. La complicación más habitual en el post-operatorio fue el derrame sinovial (3%) siendo necesaria al artrocentesis para su desaparición en el plazo de 1-2 semanas. This work was aimed at presenting …
Neuropathology of Cerebellar Infarction: Its Morphology in Comparison to Selective Postmortem Angiography of Cerebellar Arteries
1994
A typology of infarctions [11, 20] is established for the cerebral hemispheres and has recently also been used, chiefly in neuroradiological diagnosis, for cerebellar infarctions [2–5, 8, 10, 16]. Detailed clinical [12] and microangiographic [7, 9, 13, 15, 17] investigations of the vascularization of the posterior cranial fossa can be referred to in this context. With the aid of selective postmortem angiograms we examined the territories of the superior cerebellar artery (SCA), anterior inferior cerebellar artery (AICA), and posterior inferior cerebellar artery (PICA) on serial sections in the three planes of projection. The sagittal plane offers decisive advantages for assigning cerebellar…
Dielectric Behavior of Aqueous Solutions of α,β-Poly(aspartyl hydrazide) and α,β-Poly(N-hydroxyethyl aspartamide): An Investigation of the Structural…
1994
The dielectric properties of aqueous solutions of α,β-poly(aspartyl hydrazide) (PAHy) and of α,β-poly( N-hydroxyethyl aspartamide) (PHEA) were measured at 25 ° C in the frequency range of 100 MHz to 15 GHz using a time domain reflection method (TDR). Single time relaxation processes were found at 2 GHz and 15 GHz, respectively. The low frequency dispersion was inter preted in terms of the dynamics of polymeric segments based on the dielectric relaxation strength and the relaxation time. The high frequency process which is attributed to the rotational relaxation of water, indicated that water mole cules surrounding the polymeric backbone and in the pure state have a similar rotational behav…
Semileptonic decays of baryons containing two heavy quarks
1994
Abstract Semileptonic weak decays of doubly heavy baryons are analyzed and compared to the analogous decays of heavy quarkonia, showing similar underlying dynamics at low recoil.
Międzynarodowa konferencja naukowa: Pogranicze jako problem kultury ( Opole, 13 - 14 grudnia 1993. )
1994
Organisation de l'espaceur intergénique de l'ADN ribosomique nucléaire du Frêne commun (Fraxinus excelsior). Exploitation du polymorphisme moléculair…
1994
*INRA BP 86510 21065 Dijon cedex (FRA) Diffusion du document : INRA BP 86510 21065 Dijon cedex (FRA) Diplôme : Dr. d'Université
Photometric and Hα Observations of LSI+61°303
1994
The Be massive X-ray binary LSI+61°303 is a 26.5 days periodic radiosource (Taylor & Gregory, 1984), exhibiting radio outbursts maxima between phases 0.6-0.8. Evidence of a photometric period of similar value has also been reported (Paredes & Figueras, 1986; Mendelson & Mazeh, 1989). The previous spectroscopic radial velocity observations of Hutchings & Crampton (1981) are in agreement with the radio period, and give support to the presence of a companion. We present new optical and infrared photometric observations and high resolution Hα spectra of LSI+61°303.
Parallel filter estimation algorithm for segmentation on a LAN of workstations
1994
International audience
El nou diccionari normatiu de la llengua catalana
1994
This article describes the process by which the Nou Diccionari Normatiu de la Llengua Catalana (NDNLC) has been made; this dictionary brings up to date and regularizes Pompeu Fabra’s Diccionari General de la Llengua Catalana (DGLC), which implies, on the one hand, adding to the dictionary new words brought about by different social habits and by the progress of Science and technology, and, on the other hand, bringing the contents of the dictionary up to date. This project has been carried out in three different phases. The first consisted in creating a general Computer data base (BDOL) which contains, besides the DGLC, words belonging both to the common language and to specific fields; in t…
Nietzsche y el escepticismo. Ensayo aclaratorio de una pretendida contradicción
1994
En este ensayo se aborda el problema del escepticismo en la obra de Nietzsche, se revisa la bibliografía existente sobre la cuestión, y se ofrece una interpretación de la posición nietzscheana de este problema filosófico que supera las pretendidas contradicciones en las que se suponía que caía el citado autor. El eje lo constituye un comentario de texto de un importante apartado de 'Mas allá del bien y del mal'.
An Example of Ti:LiNbO3 Device Fabrication: The Mach-Zehnder Electrooptical Modulator
1994
Integrated optics on LiNbO3 has already reached a stage of maturity. Several manufacturers are producing standard and custom devices on LiNbO3 such as high speed (up to 20 GHz) phase and intensity modulators, switching matrices, hybrid optical gyroscopes, etc.1. Two techniques are commonly used to fabricate these devices: titanium indiffusion for 1.3 and 1.5 μm wavelength operation and annealed proton exchange (APE) at 0.8 μm, due to its higher power handling capacity.
Le goût des joyaux
1994
International audience