showing 36 of ~574560 from 574555 documents
Las tres sociedades
1995
Democracia de opinión
1995
Utilización de sistemas informáticos para el diseño de estaciones de tratamiento de aguas residuales
1994
Los sistemas informáticos para el diseño de Estaciones de Tratamiento de Aguas Residuales (ETAR) resultan de gran utilidad para la toma de decisiones relacionadas con la gestión de la calidad del agua en el medio natural. En este artículo se presenta el sistema DATAR, desarrollado para el diseño completo y riguroso de una ETAR que cumpla las especificaciones impuestas al vertido. Para ello se han desarrollado modelos matemáticos que describen los procesos que tienen lugar en los distintos elementos de tratamiento considerando los parámetros de calidad demanda biológica de oxígeno a los 5 días (DBO5), demanda química de oxígeno (DQO), sólidos suspendidos (SS), nitrógeno Kjeldhal (NKT) y fósf…
Foldātu ģimenes prieki un bēdas 1994. gadā: vēstule
1994
Ernesta Foldāta vēstule, kurā viņš raksta par jauna kontrakta parakstīšanu Bioloģijas institūtā zinātniskā padomdevēja amatā, universitātes pensijas paaugstināšanu, grūto ekonomisko stāvokli Venecuēlā, jauno fizioterapijas aparātu importfirmu "Amberline", ko dēli Ernests un Arvīds kopā ar sievām ir dibinājuši, par darba braucienu uz Harvardu, no kura pārvesti 50 kg bibliogrāfijas fotokopiju jaunajai grāmatai, par sievas salauzto kāju, par Venecuēlas Centrālās Universitātes Bioloģijas Skolas absolventu dāvināto piemiņas plāksni ar atzinību par 44 universitāte nostrādātajiem gadiem, par ievēlēšanu Londonas Linneja biedrībā, par LU Muzeja lūgumu atsūtīt uz Latviju savus materiālus muzeja krāju…
Datos para la Historia de la Malacología Española: Las ediciones del <em>Catálogo</em> de Graells
1994
Graells's contribution to the history of Malacology, his Catalogo de los Moluscos terrestes y de agua dulce observados en Espana y descripcion y notas de algunas especies nuevas o poco conocidas del mismo pais, is the first synthesis by a Spanish author on the subject dealing with the whole of continental Spain and the Balearic Islands. He described several new species, some of which have been included in the synonym of species known previously. The name of some of the species discussed has been abandoned, while for other cases his description remains valid.
Ernesta Foldāta vēstule Alfonam Piterānam 1994. gada 30. decembrī
1994
Ernesta Foldāta vēstule Alfonam Piterānam, kurā viņš raksta par iemesliem, kāpēc nav izdevies 1994. gadā atbraukt uz Latviju no Venecuēlas, par ceļojumu uz Hārvardas Universitāti, literatūras meklēšanu jaunai grāmatai, grūtajiem finansiālajiem apstākļiem, veselību, grāmatas izdošanu, zinātnisko darbu, darba paradumiem. Drukāta mašīnrakstā uz 1 lapas. Glabājas Latvijas Universitātes Muzeja Botānikas un mikoloģijas kolekciju krājumā.
Ernesta Foldāta vēstule Edgaram Vimbam 1994. gada 30. decembrī
1994
Ernesta Foldāta vēstule Edgaram Vimbam, kurā viņš raksta par piedāvājumu vadīt praktiskas lekcijas tropu ekoloģijā latviešu doktorantūras studentiem, par Venecuēlā sastopamajām sēņu sugām, īpaši bekām un gailenēm, par sēņu sālīšanu ziemai. Vēstules beigās Jauna gada novēlējums. Drukāts mašīnrakstā uz 1 lapas. Glabājas Latvijas Universitātes Muzeja Botānikas un mikoloģijas kolekciju krājumā.
Lek centre attracts black grouse females
1994
In several lek mating systems, centrally located males enjoy higher mating success than peripheral males. The mechanism behind this pattern, however, has been controversial and a rigorous test of the different alternatives is missing. Here we report that in black grouse Tetrao tetrix , a lekking bird species, central males achieved many more copulations than males in the periphery. Generally, central territories were smaller than peripheral ones, and males were thus more clumped in the centre. A choice experiment in an aviary provided experimental support for females being attracted to densely clustered males, so that males in larger clusters have higher expected average mating success. Thu…
Optical fiber diffusive tip designs for medical laser-lightguide delivery systems
1994
Medical laser radiation delivery instruments with diffusive tips on the distal ends of plastic-clad silica optical fibers have been designed, tested, and manufactured. The instruments are optimized for endoscopic, therapeutic, dermatologic and surgical laser treatment. The diffusive tips provide radial, cylindrical and aside-conical spatial distributions of the output radiation. Optical schemes concerning each type of the tip and the corresponding spatial distribution functions of the output radiation are presented and analyzed. Designs of the lightguide instruments for surgical and dermatological procedures demanding local high-power laser irradiation are also discussed.
J / psi production in the hadronic decays of the Z.
1994
Abstract: J/psi mesons have been reconstructed from their decay to mu(+)mu(-) and e(+)e(-), using the data collected by the DELPHI experiment during 1991 and 1992 at the LEP collider. From about 1 million hadronic Z decays 153 +/- 17 J/psi were found, 5.4 +/- 2.3 psi' were obtained in the channel J/psi(--> mu(+)mu(-))pi(+)pi(-) and 6.4 +/- 2.7 chi(c) in the channel J/psi(--> mu(+)mu(-))gamma. As the dominant source of J/psi mesons is from b quarks, the following branching ratios: Br(b-->J/psi X) = (1.12 +/- 0.12 (stat.) +/- 0.10 (syst.))%, Br(b --> psi' X) = (0.48 +/- 0.22 (stat.) +/- 0.10 (syst.))%, Br(b-->chi(cl) X) = (1.4 +/- 0.6 (stat.)(-0.2)(+0.4) (syst.))% were measured. From the prop…
Sentence arbitrale. Article 1502-4°, Recours en annulation, Ordre public international, Corruption, Contrat de pot de vin, Sanction par les arbitres,…
1994
International audience; (Paris, 30 sept. 1993, Rev. crit. DIP 1994. 349, note V. Heuzé ; Rev. arb. 1994. 359, note D. Bureau)
Acte mixte. Clause compromissoire-nullité, Demandeur en nullité, Recevabilité de l'action engagée par le commerçant contre le non-commerçant
1994
International audience; (Paris, 11 mars 1994, inédit, Ph. Alexandre c/ La Prévention routière et la Société Jardin d'acclimatation)
Clause de réserve de propriété. Hypothèque maritime sur le navire, Revendication du moteur du navire vendu avec réserve de propriété (oui)
1994
International audience; (Com. 15 mars 1994, Société Semei c/ Caisse régionale de Crédit maritime mutuel La Méditerranée et autre)
Déclaration des créances. Extinction de la créance pour forclusion, Conversion d'une obligation naturelle en obligation civile, Exclusion
1994
International audience; (Com. 31 mai 1994, Société de Crédit immobilier rural du Massif Central c/ Mme Jacquet et autres)
Déclaration des créances. Créances du Trésor public et des organismes sociaux, Admission provisionnelle, Déclarations complémentaires, Soumission au …
1994
International audience; (Com. 3 mai 1994, Institution de prévoyance des cadres PRECA c/ Soc. Gallus Union et autre)
Arbitre tenu de statuer en droit. Jugement en amiable composition, Nullité-fondement, Article 1484-3° NCPC, Arbitre ayant statué sans se conformer au…
1994
International audience; (Paris, 7 avr. 1994, inédit, Lechevalier c/ Société Croisière loisir et autres)
Physical interaction between tip and molecules in scanning force microscopy imaging of adsorbed C 60 and fullerene tubules
1994
International audience
Clause de réserve de propriété. Revente des marchandises, Revendication des deniers, Conditions, Paiement du prix après le jugement d'ouverture, Remi…
1994
International audience; (Com. 2 nov. 1993, Société Radiola c/ Société Kerlann équipement et autres)
Orientation and substrate interaction of adsorbed CO and NO molecules probed by circular dichroism in the angular distribution of photoelectrons.
1994
The sensitivity and utility of circular dichroism in the angular distribution of photoelectrons (CDAD) as a probe of molecular orientation is demonstrated for adsorbed CO and NO molecules. A comparison between measured CDAD spectra and calculated values for spatially oriented CO and NiCO clearly confirms the well-known perpendicular adsorption for CO on Ni(100), whereas for CO adsorbed on Fe(100) a tilted adsorption geometry was found. For NO/Ni(100) and for NO on the oxygen-preadsorbed Ni(100) surface, an average tilt angle of α=40±10° was observed. In the case of the oxygen-preadsorbed Ni(100) surface, a higher fraction of NO molecules was found to be in a tilted orientation than on the c…
Vérification et admission des créances. Créances fiscales, Admission définitive en cas d'absence de contestation, Conditions
1994
International audience; (Com. 2 mars 1993, Euchin ès qual. c/ Trésorier principal de Saint-Etienne banlieue ; Paris, 3e ch. B, 10 sept. 1993, Monsieur le Receveur des impôts de Juvisy Nord-Est c/ Souchon ès qual. et autre)
Tribunaux de commerce. Contrat de cautionnement, Caractère civil ou commercial, Commercialité par accessoire, Notion d'intérêt personnel patrimonial …
1994
International audience; (Paris, 22 juin 1994, inédit, Herman c/ Société Générale et autres)
Regulation of cytokine expression by interferon-alpha in human bone marrow stromal cells: inhibition of hematopoietic growth factors and induction of…
1994
We investigated the effects of interferon-alpha (IFN-alpha) on the expression of cytokines by human bone marrow stromal cells. Production of granulocyte-macrophage colony-stimulating factor (GM-CSF), granulocyte-CSF (G-CSF), and interleukin-1 beta (IL-1 beta) in stromal cell layers was induced by incubation with IL-1 alpha, tumor necrosis factor (TNF), or lipopolysaccharide (LPS). Addition of IFN-alpha to such stimulated cultures resulted in a strong downregulation of mRNA expression of GM-CSF and IL-1 beta. Similarly, the protein levels of GM- CSF and IL-1 beta were significantly reduced by IFN-alpha, whereas G- CSF production was only moderately inhibited. In contrast, IFN-alpha markedly …
Physical interaction between tip and molecules in scanning force microscopy imaging of adsorbed C60 and fullerene tubules
1994
After the discovery of C60, a large family of fullerene molecules was also identified. Among them, elongated fullerenes are formed by the tubular assembly of carbon atoms. The van der Waals bonds between fullerene molecules are due to the correlations between fluctuating charge densities inside the molecules. The interaction is then dominated by collective excitations which are sensitive to the shape of the molecules. Therefore, van der Waals attraction is expected to be modified when considering successively spherical C60, C70 and more elongated fullerenes (tubules). This paper presents self‐consistent computations of the van der Waals interaction between a (111) diamond probe tip and vari…
Sentence arbitrale internationale rendue et annulée à l'étranger. Exequatur en France, Convention de New York de 1958, Articles V et VII, Faculté de …
1994
International audience; (Civ. 1re, 23 mars 1994, rev. arb. 1994. 326, note Jarrosson)
The triaminopyridine flupirtine prevents cell death in rat cortical cells induced by N-methyl-D-aspartate and gp120 of HIV-1.
1994
Abstract Flupirtine, a triaminopyridine derivative, is a non-opiate centrally acting analgesic agent with muscle relaxant properties. Now we show that this drug displays a potent cytoprotective effect on neurons (rat cortical cells) treated with (i) the excitatory amino acid N-methyl- d -aspartate (NMDA) or (ii) with the human immunodeficiency virus type 1 (HIV-1) coat protein gp120. In the absence of the drug the two agents cause a >90% reduction of cell viability after a 18 h incubation. During this period the DNA in the cells undergoes fragmentation and shows a pattern which is typical for cell death. If the neurons were preincubated with flupirtine for 2 h and subsequently exposed to th…
Convention de Bruxelles. Art. V-1, Détermination du lieu où l'obligation qui sert de base à la demande doit être exécutée, contrat de vente, Article …
1994
International audience; (Paris, 10 nov. 1993, inédit, Société SLPM c/ Banque Paribas Belgique et autres)
Cellular immune response to human renal-cell carcinomas: Definition of a common antigen recognized by HLA-A2-restricted cytotoxic T-Lymphocyte (CTL) …
1994
Cytotoxic T lymphocyte (CTL) clones directed against autologous renal-cell carcinoma (RCC) cell lines were generated by mixed lymphocyte/tumor-cell culture (MLTC) using peripheral blood lymphocytes (PBL). A CD8+, CD4- CTL clone MZ1257-CTL 5/30 with high cytolytic activity for the autologous tumor cell line MZ1257-RCC was established. No lysis of the autologous EBV-transformed B lymphocytes (EBV-B) or K562 cells was observed. A panel of HLA-A2-matched allogeneic RCC lines was recognized by CTL 5/30. Further specificity analysis showed a cross-reactivity with HLA-A2-matched allogeneic tumor cells of various origins, especially melanoma. CTL 5/30 was also cross-reactive with several HLA-A2-pos…
Pyramidal and nonpyramidal callosal cells in the striate cortex of the adult rat
1994
The aim of this study has been to determine the neuronal types (pyramidal and nonpyramidal) within the rat's visual cortex, which project through the corpus callosum. To this end, the morphology and laminar distribution of callosal cells have been investigated by combining Diamidino Yellow retrograde tracing with intracellular injection of Lucifer Yellow in slightly fixed tissue slices. The visual callosal projection arises from pyramidal cells of diverse morphology in layers II to VIb, as well as from several modified pyramids located mainly in layers II, IV (star pyramids) and VIb (horizontal or inverted pyramids and related forms of spiny stellate cells). Our results indicate that in rat…
In vivoInvestigation of Plant-Cell Metabolism by means of natural-abundance13C-NMR spectroscopy
1994
Based on the natural abundance of 13C, in vivo13C-NMR was used for the first time to monitor the metabolism of sucrose and hydroquinone (1) in cell suspensions of the plant Rauwolfia serpentina (L.) BENTH. ex KURZ. Cells converted sucrose extracellularly into α-D- and β -D-glucose as well as into β -D-fructofuranose and β -D-fructopyranose, respectively. The sugar mixture was completely taken up by the cells after 4 days. Hydroquinone fed at that time resulted in optimum conversion into its β -D-glucoside arbutin (2) within 10 h. A further metabolite, the primeveroside (3) of hydroquinone, appeared as a trace compound after 10 h. The formation of this diglycoside can be increased by further…
Direct transfer of vitrified rabbit embryos.
1994
In this study we looked at the feasibility of transferring vitrified rabbit embryos directly into recipient does. Compacted morulae were vitrified in a solution of 20% ethylene glycol and 20% dimethyl sulfoxide. After thawing, and without step-wise diluted solution, the vitrified embryos were transferred into the recipient's uterine horns. Survival rate at birth differed from fresh rabbit embryos (40% vs 55%, P0.05). However, the percentage of does that delivered (94%) and the survival rate suggested this method is suitable for both storage and simple transfer of rabbit morulae.
Age-related changes in linoleic acid bioconversion by isolated hepatocytes from spontaneously hypertensive and normotensive rats
1994
This study points out the hepatocyte interconversion of the linoleic acid family during hypertension. Hepatocyte delta 6 desaturase activity was higher in 1 month-old spontaneously hypertensive rats than in normotensive controls. A similar tendency was observed in 6 month-old SHR. delta 5 desaturase activity was higher only in 1 month-old spontaneously hypertensive rats as compared to controls. Desaturase activities were particularly high at the age of 6 months. The hepatocyte fatty acid composition showed an impairment of n-6 polyunsaturated fatty acid metabolism in spontaneously hypertensive animals. Changes were greater in the young prehypertensive rats than in adults. A storage of n-3 l…
Intéraction Vigne-champignon-insecte: Etude de l'impact alimentaire d'un champignon phytopathogène (Botrytis cinerea) sur le développement d'un insec…
1994
National audience
Crystal structure of bacteriophage fr capsids at 3.5 A resolution.
1994
The structure of recombinant capsids of the bacterial virus fr has been determined by X-ray crystallography at 3.5 A resolution. The capsids were produced by expressing the fr coat protein in Escherichia coli, the natural host of the virus, and are probably essentially identical to the protein shell of the native virus. The structure was determined using molecular replacement with the protein shell of the related MS2 virus, and refined to a crystallographic R-factor of 0.228. A comparison of the protein shells of the viruses shows that they are very similar, and indicates that they may have a similar regulation of the assembly of the quasi-symmetrical protein shell.
Optical Investigations of Intergrowth Effects in the Zeolite Catalysts ZSM-5 and ZSM-8
1994
The Relationship Between the Comprehensiveness of Corporate Annual Reports and Firm Characteristics in Spain
1994
Abstract Not much information exists in the international accounting literature on Spanish accounting. Spain is selected as a subject of study because it is different from those countries that are subjects of the research concerned with investigating the multivariate impact of firm characteristics on disclosure in annual reports and accounts. The conceptual model underlying our empirical tests is based on economic and political incentives for providing greater detail in corporate annual reports and accounts. The paper provides evidence that the amount of detail in Spanish corporate annual reports and accounts is increasing in firm size and stock exchange listing, and decreasing in liquidity.
Cranial circulation of the pen-tailed tree shrewPtilocercus lowii and relationships of Scandentia
1994
The major cranial arteries and veins are described for a 30-mm crown-rump length fetus of the pen-tailed tree shrewPtilocercus lowii, and comparisons are made with cranial vessels reported in the tree shrewTupaia and with the vascular pattern reconstructed for primitive eutherians.Ptilocercus shares a number of derived features of the cranial circulation withTupaia, which, therefore, represent synapomorphies of tree shrews (Tupaiidae, Scandentia). Included are (1) the enclosure of the intratympanic portion of the internal carotid artery in a bony canal that is floored proximally and distally by the entotympanic and by the petrosal in between, (2) the enclosure of the intratympanic portion o…