showing 36 of ~574560 from 574555 documents
Aportaciones a la flora cesaraugustana II
1996
A Biochemical Genetic Study of Isoenzyme Polymorphism within and between Two Populations of Atherina Boyeri Risso
1996
Allozymic variation of 20 loci was investigated in two samples of Atherina boyeri collected in the Mediterranean Sea from the coast of Trappeto and Marsala Lagoon (Sicily, Italy). Five loci were polymorphic (PGM*, EST-1,2*, SOD-2*, PGI-2*) and appeared to be in Hardy-Weinberg equilibrium. A significant Fst mean value (0.02) (G = 23.77, P < 0.05, df = 5) showed that the samples can be considered as two distinct local populations and supports previous morphometric discrimination.
De la arquitectura de empresa a la imagen corporativa. Cuatro ejemplos
1996
Das merowingische Staatsvermögen
1996
catalogue de l'exposition "" Les Francs-Pionniers de l'Europe "", t. 1; International audience
Contribución al conocimiento y al desarrollo de aplicaciones analíticas de los efectos asociados a la espectrometría de lente térmica
1996
Waste Disposal and Waste Management in Antarctica and the Southern Ocean
1996
1. Introduction. 2. Waste generated in the Antarctic Treaty Area. A) The fragmentary approach. i) The Antarctic Treaty and the disposal of radioactive waste. ii) Waste generated by scientific activities. iii) Waste generated by tourist activities and non-governmental expeditions. iv) Waste generated by possible future mining activities. B) The comprehensive approach. i) The comprehensive legal framework. ii) General obligations. iii) Waste management planning and management practices. iv) Prohibited products, waste removal and waste disposal in the Antarctic Treaty Area. 3. Transboundary movements of hazardous waste and Antarctica. 4. Some conclusive remarks
Una cabaña neolítica en los Picos de Europa
1996
La comunicación da cuenta de los trabajos realizados en la cabaña de la Calvera. Se describen los resultados de la excavación de una cabaña neolítica enmarcada en las investigaciones del conjunto megalítico de la Peña Oviedo (Camaleño, Cantabria). Se discuteu las diferentes estructuras, las industrias -microlíticas, macrolíticas y cerámica-, la función y la relación espacial y cronológica de la cabaña de la Calvera con las estructuras de la Peña Oviedo. In this paper the excavation of a neolithic house at La Calvera is reported The paper describes the results of the excavation of a neolithic house carried out within the Peña Oviedo (Camaleño, Cantabria) project. This report discusses the bu…
Estudio experimental de la reactividad vascular en la hipertensión portal
1996
Assorbimento di saccarosio in ipocotili di ravanello (Raphanus sativus L.)
1996
Abstract In questo lavoro abbiamo determinato le caratteristiche di entrata del saccarosio in funzione della sua concentrazione esterna, incubando i pezzi in saccarosio triziato, in condizioni normali e di stress osmotico. Nelle parti apicali l'assorbimento di saccarosio esogeno e lineare in presenza di basse concentrazioni mentre non lo e ad alte concentrazioni. Per quanto riguarda le parti basali la linearita si mantiene per tutte le concentrazioni; inoltre nelle parti apicali l'assorbimento e maggiore che nelle basali e la differenza aumenta all' aumentare delle concentrazioni di saccarosio esterno. Abbiamo poi studiato l'assunzione di saccarosio con osmotici diversi in cui fosse present…
Humus in World Soils
1996
Publisher Summary This chapter discusses the soil humus and total organic carbon (OC) content. It reviews the results concerning the changes in soil organic matter (SOM) chemical nature regardless of the technical methods used. Information about C cycling and storage in soils is also given. Soil humus is characterized by its amounts and properties such as water retention capacity, aggregation and cementing agent, and the ability to absorb both nutrients and contaminants. The uncontrolled decrease in soil humus content affects soil water regime, aeration, fertility, and purifying capacity. The chapter focuses on the main soil types and the areas of the world where they are found, and conside…
The complexity of probabilistic versus deterministic finite automata
1996
We show that there exists probabilistic finite automata with an isolated cutpoint and n states such that the smallest equivalent deterministic finite automaton contains \(\Omega \left( {2^{n\tfrac{{\log \log n}}{{\log n}}} } \right)\) states.
Duktem czasów : księga pamiątkowa ku czci profesora Mariana Kaczmarka (1934-1994)
1996
Actual trends in the development of polyolefins
1996
The previous development and the actual and anticipated future situation in the world market of polyolefins was presented and the importance and applications of polyolefins discussed. The reasons of their dominant position among plastics materials were explained. The methods of plastics wastes utilization were characterized with particular attention paid to polyolefins. The industrial situation of this group of polymers in Poland was discussed.
Päätöksenteko suomalais-brittiläisessä parisuhteessa
1996
Efficacité et sélectivité des herbicides
1996
National audience
Correspondencia de José Pardo Sastrón en el Jardín Botánico de Valencia. II
1996
Mossàrabs de València i "Llengua mossàrab"
1996
Since the publication of Simonet's Glosario (1888) some scholars have been collecting data of sustain the hipothetical presence of Mozarab communities and the use of a Romance Language in the Valencian area under Islam. We show in this paper how they have commited abuses and arbitrarieties on the material and we interpret it in his true historical context.
État de la recherche en économie de l'éducation : aperçu général et situation française
1996
International audience
The effect of light intensities on the transcript level of proteins involved in photosynthesis in mustard plants
1996
Summary The influence of light quantity on the steady-state levels of plastid encoded transcripts was examined during the development of primary leaves from mustard ( Sinapis alba ) plants. RbcL mRNA, petA mRNA, and psbA mRNA, which encode the large subunit (LSU) of Rubisco, Cyt f of the Cyt b6/f complex, and D1 protein of PS II were investigated in leaves grown under high-light (HL) or low-light (LL) conditions. Additionally, the nuclear encoded 25 S rRNA was quantified. As a proportion of total RNA, the levels of 25 S rRNA, rbcL mRNA, petA mRNA, and psbA mRNA did not differ substantially in the HL versus LL plants. During leaf ontogenesis, though, the proportion of psbA mRNA in total RNA …
Growth analysis and mineral content in pistachio (Pistacia veraL.) infructescence and its components
1996
SummaryGrowth and seasonal variation in mineral content was described for infructescence components of ‘Bianca’ pistachio cultivar grafted onto Pistacia therebintus L. The absorption curve specific to each infructescence and fruit component was calculated on a percent dry weight and an absolute content basis. Nutrient uptake by infructescence components was consistent with their development rate. The embryo was the strongest sink for N, P and Mg uptake. Pericarp and rachis accounted for more than 80% of K and Ca accumulated in the infructescence. The highest accumulation rate occurred during rapid embryo growth.
Cognició, temporalitat i lingüístcia comparada : el pretèrit perfect perifràstic i la metàfora del temps en català
1996
Metaphor is a means of conceptualizing the world around us and an anthropological universal of expression wich helps us apprehend time in terms of space. The purpose of this paper is thus to analyse a series of time metaphors in Catalan, and more particularly the vado + infinitive construction, by showing the relationship between the conceptualizing system of Catalan and that Of other languages, such as English, German, Italian, Portuguese, French, and, especially, Occitan and Spanish.
Effetti di aggregazione e sviluppo socioeconomico. Analisi di un’«anomalia» siciliana
1996
La nueva doctrina militar y la transformación en la industria de defensa rusa.
1996
La Unión Soviética, hasta 1991, ha jugado un papel de potencia mundial. La industria de defensa ha contribuido a sustentar esta posición político-militar. La desintegración de la URSS ha alterado sustancialmente las condiciones políticas internacionales y Rusia ha pretendido establecerse en la heredera directa de la Unión Soviética. Sin embargo, que Rusia adquiera el rango de potencia mundial dependerá del tamaño y estructura de su industria de defensa. Existe, pues, una relación directa entre la evolución de la industria de defensa y el papel que desempeñará Rusia en el contexto internacional. A finales de 1993 se aprobó la nueva doctrina militar que debería expresar los intereses nacional…
Transport properties of nitrogen doped p‐gallium selenide single crystals
1996
Nitrogen doped gallium selenide single crystals are studied through Hall effect and photoluminescence measurements in the temperature ranges from 150 to 700 K and from 30 to 45 K, respectively. The doping effect of nitrogen is established and room temperature resistivities as low as 20 Ω cm are measured. The temperature dependence of the hole concentration can be explained through a single acceptor‐single donor model, the acceptor ionization energy being 210 meV, with a very low compensation rate. The high quality of nitrogen doped GaSe single crystals is confirmed by photoluminescence spectra exhibiting only exciton related peaks. Two phonon scattering mechanisms must be considered in orde…
The CEO turnover probability: a measure of the Board's power of revocation
1996
Rational expectations behaviour of households : indicators, measures and tests
1996
The analysis of household survey data regularly conducted by INSEE from 1973 to 1994 allows to detect behaviors about anticipation and perception purpose concerning price and employment. The nature of available information offers the opportunity first to develop a rational expectation test for qualitative data, then to point out expectation errors associated to optimistic and/or pessimistic attitudes for the evolution of these two economic variables. The paper provides a series of synthetic and desegregated indicators (developed usually by psychologists, sociologists, economists, ...) then rational expectation tests and correct anticipation tests. Empirical results permit to establish rathe…
Tiempo de los hechos, tiempo de la historia
1996
A lo largo de los siglos ha habido distintas experiencias y formas de representar el tiempo que han dado lugar a diversas topologías y modos de concebir su dirección. Este artículo se centra en algunas de esas representaciones del tiempo en la cultura moderna y en sus repercusiones en la historiografía, para terminar con una breve reflexión sobre la diferencia entre el tiempo pensado como algo externo y objetivo, y el tiempo en tanto construcción subjetiva.
HIV und Schwangerschaft: Risiken der Übertragung und therapeutische Möglichkeiten
1996
Die Rate der vertikalen Ubertragung von HIV im Rahmen einer Schwangerschaft liegt in Europa bei etwa 14% aller HIV-infizierten Schwangeren. Risikofaktoren sind: 1. Virusmenge gemessen an p-24-Antigenamie und Hohe der HIV-RNA-Serumkonzentrationen, 2. Abfall der CD4-Lymphozyten unter 600/µl, 3. Chorioamnionitis und 4. Zeitintervall zwischen Blasensprung und Entbindung. Stillen und vaginale Entbindung erhohen die HIV-Infektionsrate des Kindes. Durch antiretrovirale Therapie mit Azidothymidin (Retrovir®) in einer Dosis von 500 mg/Tag wird die vertikale Ubertragung um 67% reduziert. Teratogene oder mutagene Nebenwirkungen sind bisher nicht nachgewiesen worden. Die Progression der HlV-Infektion d…
2,2’Bipyrimidine: A Useful Tool in Designing Polynuclear Complexes of Controlled Nuclearity
1996
The versatility of a simple ligand such as 2,2’-bipyrimidine (bpym) which can adopt chelating and bis(chelating) coordination modes facilitates the preparation of both mononuclear and polynuclear complexes whose nuclearity can be controlled by playing with the metal to bpym molar ratio, the nature of the counterion and the presence of additional ligands. In this work, we summarize our results dealing with the preparation and the structural and magnetic characterization of complexes between first-row transition metal ions and bpym. Examples of orbital reversal and tunable exchange in bpym-containing copper(II) complexes are presented and discussed. The influence of the number of unpaired ele…
Acetylsalicylsäure in der Prävention und Therapie der koronaren Herzerkrankung
1996
Die prophylaktische und therapeutische Anwendung von Acetylsalicylsaure im kardiovaskularen System ist am besten bei der koronaren Herzkrankheit dokumentiert. Fur die praktische Anwendung ist dabei das Nutzen-/Risiko-Verhaltnis entscheidend, d.h. die (statistische) Verhinderung eines Myokardinfarktes bzw. Reinfarktes im Verhaltnis zur (statistischen) Generierung von unerwunschten Nebenwirkungen, insbesondere lebensbedrohender Blutungen. Fur die Primarprophylaxe bei Gefasgesunden ist dieses Verhaltnis ungunstig, so das beim Fehlen weiterer signifikanter Risikofaktoren keine allgemeine „Gefasprophylaxe“ mit Acetylsalicylsaure empfohlen werden kann. Dagegen ist der Nutzen von Acetylsalicylsaur…
New records of marine Tardigrada in the Mediterranean Sea
1996
Abstract Meiofauna from Chafarinas archipelago (western Mediterranean, N. Africa) were studied, and marine Tardigrada were identified to species level. A total of 15 species, belonging to families Stygarctidae, Halechiniscidae (Subfamilies Halechiniscinae, Florarctinae, Styraconyxinae and Tanarctinae), Batillipedidae, and Echiniscoididae, were found for the first time from the Alboran Sea and southwestern Mediterranean area. Four species and one subspecies are new records for the Mediterranean Sea: Floractus acer , F. asper , F. stellatus , Actinarctus doryphorus and Echiniscoides sigismundi hispaniensis . The male of Floractus stellatus , previously unknown to science, is described. Many s…
Relationship between particle size and dissolution rate of bulk powders and sieving characterized fractions of two qualities of orthoboric acid
1996
Drug Dev. Ind. Pharm. ISI Document Delivery No.: VN279 Times Cited: 1 Cited Reference Count: 22 Tromelin, A Habillon, S Andres, C Pourcelot, Y Chaillot, B; International audience; We have carried out a study of the particle size distribution and aqueous dissolution rate of two commercially available qualities of orthoboric acid, labeled ''crystal'' (ABC) and ''powder'' (ABP). In a previous work, we have shown that the two commercial qualities of orthoboric acid chosen as model compound (''powder'' and ''crystal'') are related to the same crystal network in spite of their different names. However, these two qualities have very different size particle distributions, as previously determined b…
Eficacia de las intervenciones farmacológicas en el tratamiento de la hiperactividad.
1996
El presente estudio trata de sintetizar, integrar y discutir los principales resultados constatados en la investigación con respecto a la eficacia de las intervenciones farmacológicas más frecuentemente utilizadas en el tratamiento de la hiperactividad. Este trabajo constituye la primera parte de un estudio más amplio basado en una selectiva revisión y análisis cualitativo de la literatura publicada sobre este tópico en los últimos siete años. Junto a la metodología empleada se ofrece una descripción general de los estudios incluidos en el análisis, así como de las muestras utilizadas. El trabajo evalúa la eficacia de las terapias farmacológicas en el tratamiento de la hiperactividad. Toman…
La solución justa en las resoluciones administrativas
1996
Dos neófitos novedosos para la flora de Valencia
1996
Fitting and scaling laws for high temperature Q branch collapse in the O2 stimulated Raman spectra in O2-H2O mixtures
1996
0021-9606