Intravesical instillation of adriamycin in treatment of bladder cancer

1984

Comportement en cours d'études et accès à l'emploi

1984

The influence of students behaviour patterns on their subsequent employment. The economics of education has largely focused upon the respective infuences of education ans abilities on earnings. Nevertheless, although the concept of ability has always concerned inetlligence, research has shown that behaviour variables are very important to explain differences. Indirect evidence on this is also given by the fact that the variance of earnings at each givent level of education is high.This paper attempts to show that within a population of a given level of education who enters into primary labour market, employment status will be linked with the behavioural patterns of individuals.Moreover, the…

Über den Wert ästhetischer Normen im Rahmen der Profilbeurteilung

1984

In der vorliegenden Arbeit wurde untersucht, ob die bei verschiedenen Analysen des Weichteilprofils angegebenen Normen dem entsprechen, was Laien als schon beurteilen und inwieweit das jeweilige Kriterium geeignet ist, zwischen schon und haslich zu differenzieren. Zwei Untersuchungsmaterialien standen zur Verfugung. Im ersten Teil hatte eine Beurteilergruppe 27 konstruierte Strichzeichnungen von Profilverlaufen auf Ratingskalen zu beurteilen. Im zweiten Teil wurden in ahnlicher Weise 70 Schattenris-Profile beurteilt. Als Ergebnis stellten wir fest, das die untersuchten Beurteilungsverfahren fur das Weichteilprofil nur einen geringen Wert haben, weil jedes fur sich nur wenig geeignet ist, zw…

On the range of the radon transform and its dual

1984

Les incidences de la structuration de l'offre d'éducation

1984

International audience; Les élèves et leur famille « demandent » de l’éducation à des institutions qui « offrent » des services éducatifs. La demande d’éducation est donc médiatisée par cette offre du système scolaire qui, par ses caractéristiques et ses contraintes propres influences les choix des élèves et/ou de leur famille. Ce document tente d’explorer cette influence de l’offre en distinguant trois moments de son action : tout au long de la scolarité par son influence sur la « production de valeur scolaire » par l’élève, au moment de l’évaluation de cette « valeur scolaire », au passage entre cycles d’enseignement à travers les mécanismes d’orientation.

COMPUTED TOMOGRAPHY TO PREDICT HARDNESS OF BILEDUCT STONES BEFORE ENDOSCOPIC LITHOTRIPSY

1984

Dynamics of the localization of drug metabolizing enzymes in tissues and cells.

1984

AMITRIPTYLINE: LOOKING THROUGH THE THERAPEUTIC WINDOW

1984

Kinetische Untersuchungen zu Diels‐Alder‐Reaktionen des Cyclooctins mit anschließender Aromatisierung

1984

Aus Cyclooctin (1) und den cyclischen Dienen 2a – g entstehen die Tricyclen 3a – g, die ganz unterschiedliche Stabilitat aufweisen. 3a, b, f und g zerfallen spontan. Unter Abspaltung von CO2, SO2, CO und N2 entstehen die aromatischen Verbindungen 4a – c. 3c eliminiert beim Erhitzen C2H4. 3e wird thermisch kaum mehr gespalten, aber ganz effizient bei der Photolyse, und 3d ist schlieslich gegenuber einer Aromatisierung stabil. Die thermische Ethylenabspaltung und die doppelte Photodecarbonylierung werden kinetisch untersucht. Kinetic Investigations of Diels-Alder-Reactions of Cyclooctyne with Consecutive Aromatization The tricyclic compounds 3a – g, generated from cyclooctyne (1) and the cycl…

Odd neutron nuclei near A=100: Rotational bands in103Mo and105Mo populated in the? ? decays of103Nb and105Nb

1984

Theβ − decays of103Nb and105Nb have been studied at the fission product separators JOSEF and LOHENGRIN. Half-lives of (1.5±0.2) s and (2.95±0.06) s, respectively, have been determined for these decays. Fromγ singles andγ-γ coincidence measurements extended level schemes for103Mo and105Mo have been established for the first time. The lowest energy levels of these nuclei are consistent with the interpretation as members of rotational bands built on a 3/2+ [411] Nilsson state. Evidence is presented for the location of the 9/2+ [404] configuration.

Gew�sserversauerung in der Bundesrepublik Deutschland

1984

Rotational bands in99Sr

1984

The β-decay of 59 ms99Rb has been studied at OSTIS. As is confirmed by RPA calculations with Nilsson model wave functions, the lowest energy levels in99Sr are consistent with rotational bands built on the [411 3/2], [413 5/2] and [422 3/2] Nilsson neutron configurations at 0, 423 and 1071 keV, respectively. All three bands have similar values of the inertial parameter ħ2/2θ indicating a nearly rigid rotor.

Thermodynamic properties of alcohols in a micellar phase. Binding constants and partial molar volumes of pentanol in sodium dodecylsulfate micelles a…

1984

Densities of the ternary system water-sodium dodecylsulfate (NaDS)-pentanol and of the binary systems butanol-octane and pentanol-octane were measured at 15, 25, and 35 °C. The apparent molar volume of pentanol in the ternary system was analyzed using a mass-action model for the alcohol distribution in micellar solutions. The partial molar volume of alcohol bound to the micelles and the ratio between the binding constant and the aggregation number of the surfactant are calculated. The partial molar volume binding constant, is discussed in terms of solubilization sites of the alcohol in the micelles whereas the binding constant is compared with that derived from the Nernstian partition const…

Pairwise effects of chlorine substituents on the13C NMR chemical shifts of dichlorobicyclo[2.2.1]heptanes (norbornanes)

1984

The 13C NMR spectra of nine dichlorinated bicyclo[2.2.1]heptanes (norbornanes) have been measured and assigned. The pairwise effects of chlorine substituents which cause deviations from the additivity of single-substituent effects were investigated and are discussed. The largest effect found is the high-field shift of carbons bearing vicinal cis substituents. In the case of geminal substitution deviations from additivity were found to be to low field and large in the γ, smaller in the β and negligible in the α chemical shifts. The observed deviations for 1,3-disubstituted cases vary from −3.2 to +1.1 ppm at different carbons, allowing no simple explanation. Replacement of α-hydrogen in a di…

Kinetische untersuchungen zur reaktionsfähighkeit von chlormethylgruppen in methylendiphenolen

1984

The chloromethyl derivatives of 16 differently substituted methylenediphenols were synthesized for the first time. To compare their reactivity, the solvolysis in methanol and the animolysis with an excess of p-nitroaniline in dimethyl sulfoxide were studied kinetically at 25°C. The rate constants for the methanolysis do not differ very much, beside of the fact that para-chloromethyl derivatives react about 100 times faster than ortho-chloromethyl derivatives. However, for the aminolysis a large acceleration up to 103 was found for compounds having both hydroxyl groups in ortho-position to the methylene bridge. Obviously, the cleavage of the OH bond, which occurs in the rate determining step…

Esthesioneuroblastoma: Ultrastructural, immunohistological and biochemical investigation of one case

1984

A case of esthesioneuroblastoma, the pathological diagnosis of which almost always causes great difficulties, was investigated ultrastructurally, biochemically, and immunohistologically, using antibodies against the five known types of intermediate filaments [keratin, vimentin, desmin, glial fibrillary acidic protein (GFAP) and neurofilaments]. The tumour cells did not react with antibodies against any of the five intermediate filament proteins. Ultrastructural investigations showed dense cored secretory granules in the cytoplasm and cell processes. Thus, immunohistology offers by "exclusion" a differential diagnosis to avoid often misdiagnosed tumours (undifferentiated carcinomas, embryona…

Low-energy rotational bands in the nucleus155Eu

1984

Excited states in the nucleus155Eu have been produced during in-beam bombardments of a154Sm target with3He beams at 22 and 27 MeV. Decay gamma rays were detected using coincidence equipment optimized for low-energy photons. The level scheme is based on the observedγγ-coincidence relationships combined with the information on relative intensities. Tentatively suggested spin assignments follow from the apparent rotational character of the nucleus. Experimental observations are compared with predictions calculated from a particle-rotor model with a nonspheroidal Woods-Saxon potential.

Oxygen isotopes in mammal bone phosphate: A new tool for paleohydrological and paleoclimatological research?

1984

Abstract Oxygen isotope analyses of water in blood of humans and domestic pigs indicate that the oxygen isotope fractionation effects between ingested water and body water are the same in all specimens of the same species. The δ 18 O of body water has been shown to vary linearly with the mean δ 18 O of local meteoric water. This conclusion also holds for the bone phosphate. Thus, δ 18 O ( PO 3− 4 ) values of unaltered fossil bones from humans and domestic pigs can be used to reconstruct the δ 18 O values of local meteoric waters during the life-times of the mammals. Such data can be used for paleohydrological and paleoclimatological studies both on land and at sea.

Duality in semileptonicτdecay

1984

The branching ratios for all channels of tau decay are reconsidered within the framework of perturbative and nonperturbative QCD. The predictions agree with experiment.

An overview of semi-infinite programming theory and related topics through a generalization of the alternative theorems

1984

We propose new alternative theorems for convex infinite systems which constitute the generalization of the corresponding toGale, Farkas, Gordan andMotzkin. By means of these powerful results we establish new approaches to the Theory of Infinite Linear Inequality Systems, Perfect Duality, Semi-infinite Games and Optimality Theory for non-differentiable convex Semi-Infinite Programming Problem.

Fusion-fission in the reaction76Ge+170Er

1984

Radiochemical yield measurements were performed to study mass- and charge distributions in the reaction of76Ge ions with170Er in the c.m. energy range from 222 MeV through 272 MeV. The magnitude of the resulting cross-section for fusion-fission is significantly lower than expected and is explained within the framework of Swiatecki's Extra-Push model.

Superconvergence phenomenon in the finite element method arising from averaging gradients

1984

We study a superconvergence phenomenon which can be obtained when solving a 2nd order elliptic problem by the usual linear elements. The averaged gradient is a piecewise linear continuous vector field, the value of which at any nodal point is an average of gradients of linear elements on triangles incident with this nodal point. The convergence rate of the averaged gradient to an exact gradient in theL 2-norm can locally be higher even by one than that of the original piecewise constant discrete gradient.

Problems and pitfalls of risk assessment in antenatal care

1984

Relación entre conos de direcciones decrecientes y conos de direcciones de descenso

1984

Let f: N ? R a convex function and x I Ni, where N is a convex set in a real linear space. It is stated that, if Df<(x) is not empty, then Df<(x) is the algebraic interior of Df=(x).

Mass spectra of halogenated esters 6—Methyl esters of some trihalogenated propanoic and butanoic acids

1984

The mass spectral fragmentation of trihalogenated methyl esters, formed in the reactions of monochlorinated methyl propenoates and 2-butenoates with Cl2, BrCl and Br2, have been investigated. In most cases α-cleavage gives the base peak, [COOCH3]+, the peaks originating from the subsequent losses of one or two halogen atoms also being abundant. The primary loss of a halogen atom is more prominent in the C4 derivatives, Br˙ and Cl˙ being preferentially lost from the 2- and 3-positions, respectively. The McLafferty rearrangement yields in one case the base peak; the 2-halo compounds could in general be distinguished by that fragmentation. Typical for all 2-bromo-substituted methyl butanoates …

L'enseignement universitaire au Sénégal

1984

référence interne : 84004

The influence of a bag deformation on N-N-scattering

1984

We present a model calculation to study the influence of an intrinsic nucleon deformation on the elastic scattering of nucleons. The nucleons are visualized as deformed sources for the exchange of bosons. Both static changes in the derived OBEP and the admixtures of rotational states give rise to only small effects even for large bag deformation, in addition, the two contributions tend to cancel each other.

The collective structure of106,108Ru

1984

Levels in106,108Ru have been studied by measuringγγ coincidences andγγ directional correlations of theγ-rays following theβ−-decay of 36 s106Tc and 5 s108Tc. Tc activities were separated chemically from the fission products of thermal neutron induced fission of239Pu by the continuously running system “SISAK 2” and theγ-radiation was measured on-line. An extended level scheme for108Ru, spin assignments,E2/M1 multipole mixing ratios andB(E2) ratios for106Ru and108Ru have been obtained. The collective structure of the two nuclei is discussed in the framework of different nuclear models.

In vitro morphogenesis from excised leaf explants of Digitalis obscura L.

1984

The morphogenic capacity of Digitalis obscura leaf explants cultured in vitro has been studied, noting factors promoting the differentiation of roots, buds and shoots as well as those promoting callus proliferation. Complete plant regeneration was obtained only by first culturing the leaf explants in a medium with NAA and BA to induce formation of buds, and subsequently transferring them to a medium without growth regulators to achieve the further development of shoots.

Determination of biogenic amines in meat by combined ion-exchange capillary gas chromatography

1984

Abstract A procedure is described for the determination of putrescine, cadaverine and histamine in meat. Crude perchloric acid extracts were pre-separated on a weakly acidic cation exchanger and the amines quantified by capillary gas chromatography. The diamines were analysed as trifluoroacetyl derivatives and histamine was converted into N α -trifluoroacetyl-N τ -ethoxycarbonylhistamine. The accuracy of the determination of diamines was examined by a precipitation pre-separation method and by mass fragmentometric quantification. The proposed procedure allows the sensitive, sufficiently precise and highly specific determination of putrescine and cadaverine in meat.

Alkaline haematin D-575, a new tool for the determination of haemoglobin as an alternative to the cyanhaemiglobin method. I. description of the method

1984

A new method for the rapid and accurate measurement of haemoglobin has been developed as an alternative to the conventional cyanhaemiglobin method. This method is based on the conversion of all haeme, haemoglobin, and haemiglobin species into a stable end product by an alkaline solution of a non-ionic detergent ('AHD reagent'). The reaction product, designated as alkaline haematin D-575, is extremely stable and shows a characteristic absorption peak at 575 nm. As compared to the cyanhaemiglobin method, the determination of haemoglobin by alkaline haematin D-575 offers several advantages such as (1) extreme stability of the AHD reagent and the conversion product, (2) decreased conversion tim…

The 2-oxoglutarate binding site of prolyl 4-hydroxylase. Identification of distinct subsites and evidence for 2-oxoglutarate decarboxylation in a lig…

1984

The structure and function of the 2-oxoglutarate binding site of prolyl 4-hydroxylase was studied by assaying the inhibitory potential of 24 selected aliphatic or aromatic compounds. All except one of them inhibited the enzyme competitively with respect to 2-oxoglutarate and noncompetitively with respect to Fe2+, the Ki values ranging from 0.8 microM to over 15 mM. The Ki values for the two most effective inhibitors, pyridine 2,5-dicarboxylate and 2,4-dicarboxylate, were about 0.8 microM and 2 microM, these compounds being the most potent inhibitors of prolyl 4-hydroxylase with respect to 2-oxoglutarate known so far. Only one of the compounds tested, 2-oxoadipinate, was able to support hydr…

Synthese des Methylethers der Herzgift-Methylreduktinsäure ausD-Glucose

1984

Der Methylether 5 der „Herzgift-Methylreduktinsaure” (2), eines Abbauproduktes der Calotropis-Cardenolide, wird in einer mehrstufigen Synthese aus D-Glucose als chiralem Ausgangsmaterial hergestellt. Damit wird die durch Abbaureaktionen getroffene Konfigurationszuordnung fur 2 durch Synthese von 5 bestatigt. Synthesis of the Methyl Ether of “Herzgift-Methylreduktinsaure” Starting from D-Glucose The methyl ether 5 of „Herzgift-Methylreduktinsaure” (2), a degradation product of the Calotropis cardenolides, has been synthesized starting from D-glucose as the chiral pool. The configuration of 2, previously based on the results of degradation, is confirmed by the synthesis of 5.

CORTICOTROPIN-RELEASING-FACTOR INDUCED PITUITARY-ADRENAL RESPONSE IN DEPRESSION

1984

Técnicas constructivas y organización del habitat en el poblado ibérico de Pintal dels Llops (Olocau, Valencia)

1984

Avance para un "corpus" de inscripciones árabes valencianas

1984

EL TIEMPO TRANSCURRIDO DESDE LA APARICION DE LAS "INSCRIPTIONS ARABES D'ESPAGNE" DE LEVI-PROVENCAL, JUSTIFICA LA ACTUALIZACION DEL MISMO. ESTA TAREA, LLEVADA A CABO EN OTRAS ZONAS, ES NECESARIO EFECTUARLA EN EL AMBITO DEL PAIS VALENCIANO. AQUI SE PRESENTA EL PRIMER INVENTARIO DE TODAS LAS PIEZAS CONOCIDAS, PUBLICADAS O NO, CUYO MATERIAL ESCRITUARIO SEA PIEDRA, METAL O YESO, DESECHANDO LAS REALIZADAS EN CERAMICA, MADERA O MONEDAS. (A)