showing 36 of ~574560 from 574555 documents

La dépendance des catégories conceptuelles en sciences sociales

1977

Se trata de la intervención de José Vidal-Beneyto en la ""I Conferencia internacional sobre el Imperialismo Cultural"", celebrada en Argel (Argelia), con fecha del 13 de octubre de 1977 (conferencia organizada por la Liga Por los Derechos y la Liberación de los Pueblos)."

Derechos HumanosManifiestoCulturaVidal-Beneyto JoséSOCIOLOGÍAImperialismo culturalCiencias SocialesImperialismoIntervenciones públicas

Zur Planung der Leistungserstellung im Linienverkehr

1977

Linienverkehr ist als’derjenige Verkehr definiert worden, bei dem der Verkehrsbetrieb vor Beginn der Planungsperiode aufgrund lediglich erwarteter Nachfrage sowohl die Orte festlegt, die er in dieser Periode bedienen wird, als auch die Zeiten, zu denen er Beforderungen anbietet. Damit sind die wichtigsten im Rahmen der Planung der Leistungserstellung zu erfullenden Aufgaben eines im Linienverkehr anbietenden Verkehrsbetriebes umrissen. Er mus vor jeder Planungsperiode die zu bedienenden Orte sowie die Objektarten auswahlen, die zu befordern er sich bereithalten will, sowie schlieslich die Zeiten, zu denen er die einzelnen Verkehrsleistungen zu erstellen anbietet. Wie allgemein konnen allerd…

Magnetic hyperfine anomaly in muonic193Ir

1977

The nuclear decay of the 5/2+ 139 keV state to the 3/2+ ground state was observed in muonic193Ir. The hyperfine splitting of the 3/2+ state and 5/2+ state was determined to be 640±100 eV and 1280±160 eV, respectively. The ground state splitting is about twice that of a point nucleus, an anomaly never observed this large. This is mainly due to the different radial distribution of spin and orbital magnetization of a d3/2 proton configuration for which these contributions nearly cancel to zero in the magnetic moment. But calculations including configuration mixing and coupling to a vibrating or a deformed core show deviations. The groundstate anomaly is in line with that observed by the Mossba…

PhysicsNuclear and High Energy PhysicsProtonMagnetic momentCondensed Matter PhysicsAtomic and Molecular Physics and OpticsMössbauer spectroscopyPhysical and Theoretical ChemistryAtomic physicsAnomaly (physics)Spin (physics)Ground stateOrbital magnetizationHyperfine structureHyperfine Interactions

Las fiestas de la nobleza valenciana en el siglo XVII: un ejemplo característico

1977

:HISTORIA::Historia moderna [UNESCO]HumanidadesUNESCO::HISTORIA::Historia modernaHistoria

Über den vertauschungsring von permutationsgruppen

1977

Algebra and Number TheoryHumanitiesMathematicsCommunications in Algebra

Distribución espacial de los inmigrados

1977

UNESCO::HISTORIAGeografíaGeociencias. Medio ambienteGrupo B:HISTORIA [UNESCO]

The Electromagnetic Polarizabilities of the Proton and the Scalar-Isoscalar gamma gamma --> pi pi Amplitude

1977

In a dispersive approach to the calculation of the electromagnetic polarizabilities of the proton, the sensitivity to the annihilation channel input is analyzed. It is shown that the isoscalar s wave absorptive part gives the overwhelming contribution. The connection with the poorly known γγ→ππ amplitude is established and some numerical estimates are presented.

Nuclear TheoryFísica

Possibilities of surface reaction coupling with transport phenomena

1977

International audience; The thermodynamic approach of nonequilibrium phenomena allows, through the construction of entropy production, appropriate fluxes generalized forces to be identified, and the possibility of coupling to be detected. For the interface phase the expression entropy production consists of two parts: one for irreversible phenomena in the surface (chemical reactions and transport); and the second for transport processes between volumic phases due to the discontinuity of intensive surface parameters. Accordingly in the linear range, the phenomenological relations establishing the thermodynamic coupling between fluxes and forces of the same tensorial order may cause couplings…

[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry[CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment[SPI.FLUID] Engineering Sciences [physics]/Reactive fluid environment

Die perkutane Instrumentation bei Nierensteinen

1977

Trotz vermehrter Kenntnisse uber die Steingenese und Erweiterung der konservativen Therapiemoglichkeiten, erreicht das Steinleiden einiger Patienten ein Stadium, in dem die Probleme der Therapie auf die Frage der Organerhaltung der steintragenden Niere reduziert sind. In derartigen Grenzfallen haben sich die perkutane Nephrostomie und die perkutane Steinextraktion bewahrt.

Juliano, restaurador del derecho antiguo

1977

UNESCO::HISTORIA::Historia por épocas::Historia antigua:HISTORIA::Historia por épocas::Historia antigua [UNESCO]RestauraciónDerecho romano

Las cerámicas de Sagunto: introducción a una metodología del estudio de las cerámicas de Sagunto y su relación con la geología de la zona

1977

Humanidadeslcsh:Clcsh:Archaeologylcsh:CC1-960UNESCO::HISTORIA::Ciencias auxiliares de la historia::ArqueologíaHistorialcsh:Auxiliary sciences of history:HISTORIA::Ciencias auxiliares de la historia::Arqueología [UNESCO]Sagvntum

Rara avis

1977

Literatura latinaUNESCO::HISTORIA::Historia por épocas::Historia antiguaRara avisAve fénixSignificadoSátira:HISTORIA::Historia por épocas::Historia antigua [UNESCO]Poesía latina

Abundance of Philaenus spumarius in relation to types of plant community in the Tvärminne archipelago, southern Finland

1977

Eight main types of plant community capable of supporting populations of the meadow spittlebug (Philaenus spumarius (L.), Homoptera), were distinguished on the islands of the Tvärminne archipelago, off the south coast of Finland. The area is subject to land upheaval amounting to about 42 cm in 100 years. The flora and vegetation of the island meadows develop through successive stages determined by edaphic, climatic and biotic factors which themselves are changed by land upheaval. The meadows are mostly very small. The secular succession of the vegetation is rendered irregular by yearly and longer-term fluctuations in climate. Changes in the vegetation affect the choice of food-plants availa…

Bleomycin, an Antibiotic That Removes Thymine from Double-Stranded DNA

1977

Publisher Summary This chapter reviews that bleomycins are members of a new class of DNA-modifying agents, the quasi-enzymes. In in vitro systems, bleomycin first removes thymines from native DNA by hydrolysis of the N-glycosidic bonds without modifying the deoxyribose moiety. In a second step, single-strand scissions occur at the sites of the nonglycosidic deoxyribose moieties, resulting in the formation of 3'-OH and 5'-P termini. It is suggested that bleomycin is bound to DNA by interaction of the positively charged terminal amine moiety with the negatively charged phosphate group in DNA; intercalation seems to be involved in binding. Bleomycin is inactivated by copper and zinc ions, prob…

chemistry.chemical_compoundDNA synthesisbiologyBiochemistrychemistryDeoxyriboseDNA polymerasebiology.proteinActive siteMoietyPolymeraseDNAThymine

Pinturas rupestres esquemáticas en los alrededores de Santo Espíritu (Gilet y Albalat de Segart, Valencia), y la cronología del arte rupestre

1977

lcsh:CHumanidadeslcsh:Archaeologylcsh:CC1-960UNESCO::HISTORIA::Ciencias auxiliares de la historia::Arqueologíalcsh:Auxiliary sciences of historyHistoria:HISTORIA::Ciencias auxiliares de la historia::Arqueología [UNESCO]

Gas-chromatographische Trennung und Bestimmung einiger Kationen als Diäthyldithiophosphinatochelate

1977

Das thermogravimetrische und gas-chromatographische Verhalten einiger Bis-(diathyldithiophosphinato) chelate wird beschrieben. Beispiele fur Trennungen und Bestimmungen anorganischer Kationen (Zn, Cd, Co, Ni, Pb) werden gegeben.

ChemistryClinical BiochemistryGeneral Materials ScienceGeneral MedicineAnalytical ChemistryNuclear chemistryFresenius' Zeitschrift für analytische Chemie

El 'Puntal sobre la Rambla Castellarda' y el poblamiento eneolítico en la Región Valenciana

1977

Materiales líticosPoblamientoUNESCO::HISTORIA::Historia por épocas::Historia antiguaEneolíticoHallazgo arqueológico:HISTORIA::Historia por épocas::Historia antigua [UNESCO]

Movement dependent position changes of the antennular flagellum ofPalaemon xiphias (Risso)

1977

The angular positions of the outer flagellum ofPalaemon xiphias were obtained by cinematographic measurements during different phases of locomotion. Contrary to the upright resting position the flagella are stretched forward into a distinct starting position preliminary to any forward movement, and then pushed down with acceleration of swimming speed. These phenomena are discussed in context with comparable behaviour in other decapods and in insects.

Behavioral NeuroscienceSwimming speedPhysiologyMovement (music)Position (vector)Animal Science and ZoologyGeometryContext (language use)AnatomyBiologyFlagellumEcology Evolution Behavior and SystematicsJournal of Comparative Physiology ? A

Musiikinopetuksen ja kodin musiikillisen virikeympäristön vaikutuksista Jyväskylän Cygnaeuksen koulun 3.-6. musiikki- ja normaaliluokkien oppilaiden …

1977

Copolyamides from adipic and truxillic acids: Synthesis and characterization by direct pyrolysis in the mass spectrometer

1977

The synthesis of a series of polyamides and copolyamides containing α-truxillic and adipic units in the chain is reported. The thermal degradation of these polymers was investigated by direct pyrolysis in the ion source of a mass spectrometer. Thermal degradation reactions were followed directly by this method by detecting the thermal- and electron-impact-induced fragments. The results obtained show a good correlation between the intensity of mass peaks characteristic of truxillic and adipic moieties and the composition of the copolyamides, as ascertained by elemental analysis. This is an important result since it shows the potential of the direct pyrolysis method in the analysis of copolym…

chemistry.chemical_classificationMaterials sciencechemistryElemental analysisPolyamideInorganic chemistryCopolymerAnalytical chemistryDegradation (geology)PolymerMass spectrometryPyrolysisIon sourceJournal of Polymer Science: Polymer Chemistry Edition

Mucolipidosis I — A sialidosis

1977

Mucolipidosis I is characterized by Hurler-like features and skeletal dysplasia with a cherry-red macular spot and signs of neurodegeneration involving neuronal cells and myelin. Excessive amounts of sialic acid-containing compounds were found in cultured fibroblasts, leukocytes, and urine of a patient with a clinical phenotype of mucolipidosis I. In cultured fibroblasts, profoundly diminished activity of an alpha-N-acetylneuraminidase (sialidase) was found. Mucolipidosis I thus appears to be a distinct disorder of complex carbohydrate catabolism caused by the genetic deficiency of a neuraminidase.

Malemedicine.medical_specialtyHydrolasesNeuraminidaseSialidaseMyelinMucolipidosesInternal medicinemedicineHumansSialidosisChildCells CulturedGenetics (clinical)SkinbiologyMucolipidosisCatabolismNeurodegenerationmedicine.diseasePhenotypeEndocrinologymedicine.anatomical_structureDysplasiaChild PreschoolImmunologySialic Acidsbiology.proteinLysosomesNeuraminidaseFollow-Up StudiesAmerican Journal of Medical Genetics

Auge demográfico reciente

1977

GeografíaUNESCO::HISTORIAGeociencias. Medio ambienteGrupo B:HISTORIA [UNESCO]

Analyse des Visuellen Klassifikationssystems Durch Detektionsexperimente

1977

Summary Experiments on recognizing statistically distorted patterns show that the human visual system operates as a linear classifier. The spatial frequency range, within which features are extracted, is determined by the coupling in the area of sharpest vision (2°). The relevant features for classifying patterns are not produced by isotropic filtering

Computer sciencebusiness.industrySpeech recognitionHuman visual system modelPattern recognitionLinear classifierSpatial frequencyArtificial intelligencebusinessIFAC Proceedings Volumes

Methoden der Programmerstellung in zeitkritischen Systemen

1977

Bereits seit einer Reihe von Jahren machen die Techniken von Laborautomatisierung und Experimentkontrolle intensiven Gebrauch von den jeweils verfugbaren Informationsverarbeitungsgeraten; durch den Einsatz solcher Apparate wird in den Anwendungsgebieten ein hoher Standard an Leistung, Sicherheit und Mobilitat erreicht (1,2). Gegenwartig fuhren Miniaturisierung, sinkende Herstellungskosten und hohe Zuverlassigkeit der entwickelten Kleincomputer zu erheblicher Ausweitung der Einsatzgebiete im diskutierten Bereich. In bestimmten Anwendungsgebieten jedoch sind die Experimentiertechniken erst durch die volle Ausnutzung der Fahigkeiten heutiger Prozesrechner ermoglicht worden. Komplexe Aufbereitu…

Introducción

1977

GeografíaUNESCO::HISTORIAGeociencias. Medio ambienteGrupo B

Los planteamientos socioeconómicos del Partido Democrático. La polémica entre Pi y Margall y Castelar en 1864

1977

SocialismoReforma políticaPensamiento políticoUNESCO::HISTORIA::Historia por épocas::Historia antiguaPensamiento económicoPolémica:HISTORIA::Historia por épocas::Historia antigua [UNESCO]Demócratas

Zinn - Chalkogen - Heterocyclen. V. 2,2,3,3,5,5,6,6-Octamethyl-1.4-dithia-2,3,5,6-tetpastan-ninan, Darstellung und Zersetzung eines Zinnreichen Heter…

1977

Abstract The title compound can be regarded as a sulfur derivative of the corresponding organoditin compound arid contains -formally- tin in the oxidation state 3. It is prepared in analogy to tris (dimethyltinsulfide).

Inorganic ChemistryTrischemistry.chemical_compoundchemistryOxidation statechemistry.chemical_elementPhysical and Theoretical ChemistryTinSulfurMedicinal chemistryDerivative (chemistry)Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry

Die Cheliceren-Dr�sen der Weberknechte nach rasteroptischen und lichtoptischen Befunden (Arachnida: Opiliones)

1977

Die meisten Arten der Familien Dicranolasmatidae, Nemastomatidae, Ischyropsalididae und Sabaconidae besitzen als sekundares mannliches Geschlechtsmerkmal ein epidermales Drusenorgan im Chelicerengrundglied, das oft in den Cephalothorax verlagert ist. Die Austrittsstellen fur das Sekret liegen immer auf dem Grundglied entweder als Feld von Einzelporen (Porenplatte) oder als weitlumiger Einzelporus — die Porenplatte meist exponiert auf dorso-distaler Apophyse des Grundgliedes.

Gynecologymedicine.medical_specialtymedicineAnimal Science and ZoologyAnatomyBiologyDevelopmental BiologyZoomorphologie

Formation and release of acetylpyrrolidinecholine (N-methyl, N-acetoxyethylpyrrolidinium) as a false cholinergic transmitter in the myenteric plexus …

1977

1. Longitudinal muscle strips of the guineapig small intestine were incubated with Tyrode solution containing the choline analogue pyrrolidinecholine. At the end of the incubation the concentrations of acetylcholine and its analogue acetylpyrrolidinecholine were determined in the strips by gas chromatography. 2. After 120 min of incubation with 1 mM pyrrolidinecholine, acetylpyrrolidinecholine comprised about 15% of the total amount of acetylcholine plus acetylpyrrolidinecholine. Electrical stimulation (1 Hz) of the strips during the incubation slightly increased the proportion of acetylpyrrolidinecholine to 21%. 3. The acetylcholine content of control strips increased significantly during …

Malemedicine.medical_specialtyPyrrolidinesTime FactorsGuinea PigsMyenteric PlexusStimulationIn Vitro TechniquesGuinea pigchemistry.chemical_compoundInternal medicineIntestine SmallmedicineCholineAnimalsIncubationMyenteric plexusPharmacologyChemistryParasympatholyticsGeneral MedicineSmall intestineAcetylcholineElectric StimulationMuscle DenervationEndocrinologymedicine.anatomical_structureCholinergicFemaleAcetylcholinemedicine.drugNaunyn-Schmiedeberg's archives of pharmacology

The effect of Keyhole Limpet Hemocyanin (KLH) on the rat bladder

1977

Immunostimulation with agents such as BCG or KLH may represent an adjuvant therapy in treating patients with bladder cancer. To investigate the effects of direct instillation and injection of KLH into the bladder of sensitized and nonsensitized rats, KLH was injected submucosally into the bladder. Histologically, a marked inflammatory reaction was seen without ulcerations.

Cancer ResearchPathologymedicine.medical_specialtyBladder cancerbiologybusiness.industryImmunologyhemic and immune systemschemical and pharmacologic phenomenaurologic and male genital diseasesmedicine.diseasecomplex mixturesOncologyImmunologyAdjuvant therapybiology.proteinImmunology and AllergyMedicinebusinesstherapeuticsRat BladderKeyhole limpet hemocyaninCancer Immunology Immunotherapy

SEX DIFFERENCES IN THE PATTERN OF CYTOCHROMES P-450 IN RAT LIVER MICROSOMES

1977

ABSTRACT A number of sex differences in the spectral and enzymic properties of rat liver microsomes have been observed which may reflect differences in the population of hepatic cytochromes P 450 of male and female rats: 1. a blue shift in the spectrum of the reduced P 450-CO complex in females as compared to males, 2. lower ΔA max values in the binding of metyrapone to reduced microsomes in females as compared to males, 3. a higher proportion of 2-hydroxylation in the metabolism of biphenyl in females as compared to males, 4. preferential inhibition of ethoxycoumarin deethylation, benzpyrene hydroxylation and biphenyl-4-hydroxylation by α-naphthoflavone in females but by metyrapone in male…

medicine.medical_specialtyeducation.field_of_studyMetyraponePopulationMetabolismBiologyHydroxylationRat liver microsomeschemistry.chemical_compoundEndocrinologychemistryInternal medicinemedicineMicrosomeMonooxygenase activityPhenobarbitaleducationmedicine.drug

Política del rey católico en la ciudad de Valencia

1977

:HISTORIA::Historia moderna [UNESCO]HumanidadesUNESCO::HISTORIA::Historia modernaHistoria

Simultaneous determination of 4-nitroanisole, 4-nitrophenol, and 4-nitrocatechol by phase-sensitive ac polarography.

1977

Abstract Phase‐sensitive ac polarography was applied to the simultaneous quantitative determination of 4‐nitroanisole, 4‐nitrophenol and 4‐nitrocatechol in alkaline solutions. Certain experimental precautions are necessary to determine each compound in the presence of the other two. Thus, 4‐nitrocatechol is determined indirectly by forming a yellow ratio chelate with cupric ions, whereas 4‐nitroanisole is determined directly by the reduction waves of the nitro group. For the determination of 4‐nitrophenol, the interference by the simultaneously present 4‐nitrocatechol must be eliminated by masking it by the addition of magnesium ions. The method described permits a qualitative and quantitat…

PolarographyCalibration curveAnalytical chemistryCatecholsPharmaceutical Science4-NitrophenolAnisolesHydrogen-Ion ConcentrationNitro CompoundsIonNitrophenolschemistry.chemical_compoundchemistryNitroMethodsChelationMagnesiumQuantitative analysis (chemistry)Magnesium ionCopperPolarographyJournal of pharmaceutical sciences

Zusammenfassung der Diskussion zum Thema: „Fortschritte auf dem Gebiet der parenteralen Ernährung“ und „Parenterale Ernährung unter speziellen klinis…

1977

LACKNER: DUDRICK emphasized the attempts to improve the immune competence It has been shown by Dr. CARPENTIER et al. from Belgium—(2)—that in improving the nitrogen balance he could directly increase the lymphocyte function which was measured in vitro by means of the lymphocyte transformation test.

AndrologyNitrogen balancemedicine.anatomical_structureLymphocyte transformationbusiness.industryLymphocytemedicinebusiness

Aktivitätsbestimmung von Isoenzym CK-MB. Anwendung und Grenzen in der Diagnostik des Myokardinfarktes

1977

Die Abklarung von Aktivitatserhohungen der Kreatinkinase kann in der Differentialdia-gnose des Myokardinfarktes wegen des Vorkommens dieses Enzyms vor allem in der Skelettmuskulatur und in fast alien parenchymatosen Organen erhebliche Schwierigkei-ten bereiten. Eine organbezogene Zuordnung von CK-Aktivitatserhohungen ist deswegen haufig nicht moglich. Eine Verbesserung der diagnostischen Situation wird durch die Bestimmung der Isoenzyme der Kreatinkinase erreicht, da in den einzelnen Organen unterschiedliche Verteilungsmuster der Isoenzyme gefunden werden. Das Isoenzym CK-MB kommt vorwiegend in der Herzmuskulatur vor, hier betragt sein Aktivitatsanteil zwischen 30 und 50% der Gesamtaktivita…

Die mechanischen Eigenschaften der Stoffe und ihre molekulare Struktur

1977

Nach der auseren Erscheinungsform unterscheiden wir drei Aggregatzustande, in denen die Materie auf der Erde vorkommt, namlich den festen, flussigen und gasformigen Zustand. Ein fester Korper hat immer eine bestimmte Gestalt und daher auch einen bestimmten Rauminhalt, d. h., er setzt einer Anderung seines Volumens und seiner Gestalt einen Widerstand entgegen, er besitzt Form- und Volumenelastizitat (Abschn. 3.2.2 u. 3.3.1). Ein flussiger Korper hat zwar einen bestimmten Rauminhalt, aber keine feste Form, besitzt also nur Volumenelastizitat. Die Flussigkeit nimmt immer die Form des Gefases an, in das wir sie einfullen. Ein Gas hat weder eine gestimmte Gestalt noch einen bestimmten festen Rau…