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  • 2005-2009
  • 1990-1994  (7)
  • 1985-1989  (6)
  • 1992  (7)
  • 1987  (6)
Material
Years
  • 2005-2009
  • 1990-1994  (7)
  • 1985-1989  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 42 (1987), S. 0 
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A patient with carcinoid syndrome on long-term antiserotonin therapy with parachlorophenylalanine, experienced a flushing attack with hypotension during the prophylactic administration of aprotonin prior to the induction of anaesthesia. When she was subsequently prepared with a long-acting somatostatin analogue, octreotide (Sandostatin, Sandoz SMS 201–995), plasma levels of tumour-released hormones were reduced and anaesthesia for resection of hepatic metastases was uneventful. The advantages of an anaesthetic approach based on inhibition of carcinoid tumour activity, rather than antagonism of released hormones, are discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 17 (1992), S. 161-186 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Dental traumatology 8 (1992), S. 0 
    ISSN: 1600-0595
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract The steady acoustic streaming generated around straight and precurved oscillating ultrasonic files driven by the Piezon-Master 400 unit was examined in the free field and in small channels using a stereomicroscope. In addition, the effect of file-wall contact on streaming production was also investigated. The results indicated that the ultrasonic files can generate acoustic streaming both in the free field and in the small channel. Higher velocity streaming was observed when smaller size files were employed and when the file was precurved. Light file-wall contact did not totally inhibit streaming while severe file-wall contact inhibited movement of the file and, as a result, no streaming was observed. The positions and length scales of the streaming vortices appeared to be influenced by the presence of boundaries. In the free field, two rows of vortices were situated along the sides of the file while in the small channel, the vortices were positioned above the surface of the file. These results indicated that it is possible for acoustic streaming to occur in a confined space as in a root canal provided that severe file-wall contact is avoided. It is therefore recommended that light filing or allowing the file to freely vibrate during some stage of treatment should be carried out in order to generate streaming in the root canal.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1572-8927
    Keywords: Borates ; aqueous ; thermodynamics ; electrolytes ; Harned cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Potentials for the cell without liquid junction $$H_2 ,Pt\backslash B(OH)_3 (m_1 ), MB(OH)_4 (m_2 ), MCl(m_3 )\backslash AgClAg$$ where M is sodium or potassium are reported over a range of ionic strength to I=3 mol-kg−1 at 5 to 55°C. Total boron concentration in the solutions was restricted to low levels to minimize formation of polynuclear boron species. Cell potentials are treated with the Pitzer ion interaction treatment for mixed electrolytes, with linear ionic strength dependence assumed for the activity coefficient of undissociated boric acid. Trace activity coefficients of sodium and potassium borates in chloride media are calculated at various temperatures.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 25 (1992), S. 464-475 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Summary This paper studies the relationship between design mix and mechanical properties (compressive strength, modulus of elasticity, endogenous shrinkage) of high-strength concretes of the 50–100 MPa range. The models proposed for each of these properties are based on an analysis of the hardness of concrete considered as a composite material, offering the possibility of tracing the properties of the concrete through to those of the matrix. The properties of the matrix are linked to the two main parameters of the mix (water/cement and silica/cement ratios) by empirical laws obtained by averaging out experimental data. Eleven concretes were made with the same ingredients, by varying separately the design mix parameters, also with the aim of identifying the effect of these parameters on the properties under study. The accuracy of the models proposed has been evaluated from these experimental data and other data drawn from the literature. Since these models form a synthesis of present knowledge of the material, they constitute a valuable contribution to the specification of high-strength concretes.
    Notes: Résumé On s'intéresse dans cette publication aux relations entre composition et propriétés mécaniques (résistance en compression, module élastique, retrait endogène) des bétons à hautes performances (BHP) dans la gamme 50–100 MPa. Les modèles proposés pour chacune de ces propriétés s'appuient sur une analyse du béton durci en tant que matériau composite, permettant de passer des propriétés du béton à celles de sa matrice. Les propriétés de la matrice sont reliées aux deux principaux paramètres de composition (rapports eau/ciment et silice/ciment) par des lois empiriques obtenues par lissage de données expérimentales. Onze bétons ont été fabriqués avec les mêmes composants, en faisant varier séparément les paramètres de composition, afin de mettre en évidence l'influence de ces paramètres sur les propriétés en question. Ces données expérimentales, ainsi que d'autres données tirées de la littérature, ont permis d'évaluer la précision des modèles proposés. Il est montré finalement que ces modèles, synthétisant la connaissance actuelle du matériau, peuvent constituer une aide précieuse à la formulation de BHP définis à partir d'un cahier des charges.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 6 (1987), S. 91-92 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 6 (1987), S. 525-527 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 27 (1992), S. 4614-4618 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract To control the SiO2/Al2O3 ratio in a starting clay material for the synthesis of β′-sialon by the carbothermal nitridation process, montmorillonite was pillared with Al2O3. Conversions to sialon of pillared clay (31% Al2O3) and reference unpillared montmorillonite (18% Al2O3) have been compared. Pillared montmorillonite yielded a mixture of β′-sialon and various oxynitrides and oxycarbides of alumina as intermediate products. Pillared clay transformed faster during annealing than structural components of smectite alone. For the proper thermal treatment and clay/carbon ratio, both pillared and unpillared clays resulted in β′-sialon solid solutions.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Advances in contraception 3 (1987), S. 341-348 
    ISSN: 1573-7195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Resumé On a étudié les effets de l'administration par voie intravaginale d'une dose unique de prostaglandine A1 à des hamsters au début de la gestation. On a constaté au huitième jour qu'une dose unique de 1 mcg par animal, administrée au quatrième jour de gestation, avait inhibé l'apparition des grosseurs embryonnaires. On a constaté en outre une baisse significative (p〈0,01) de l'HSF, avec une augmentation (p〈0,03) de la concentration de prolactine sérique, mais aucun changement dans les niveaux de l'HL. La teneur en prolactine retrouvée dans l'hypophyse présentait une biasse significative (p〈0,0006), sans qu'il y ait eu de changement dans la teneur en HSF et HL. En outre, la concentration de progestérone dans le sérum et dans les ovaires était sensiblement réduite (respectivementp〈0,002 etp〈0,01). La baisse de la concentration de progestérone concidait avec l'absence de corps jaune et d'embryon. Aucune modification du poids des ovaires n'a cependant été observée. Ces résultats font apparaitre le potentiel de la prostagladine A1 en tant qu'agent inhibiteur de la gestation. Son action semble être celle d'un agent lutéolytique qui perturbe le complexe lutéotrope. (HSF: proportion de prolactine)
    Abstract: Resumen Se investigaron los efectos de una administración intravaginal de prostaglandina A1 en hamsters con embarazo temprano. Una sola dosis de 1 mcg/animal al 4° día del embarazo (P) inhibió la aparición de los edemas embriónicos cuando se los observó en el 8° día del embarazo. Se notó una caída significativa (p〈0,01) en FSH con un aumento (p〈0,03) en la concentración de prolactina y ningun cambio en los niveles de LH. E1 contenido de prolactina en la pituitaria mostró una disminución significativa (p〈0,0006) sin cambios en los niveles de FSH y LH. La concentración de progesterona en suero estuvo notablemente reducida (p〈0,002) asi como la de los ovarios (p〈0,01). La disminución en la concentración de progesterona coincidió con la ausencia de cuerpo lúteo y de embriones. Sin embargo, no se observó cambio en el peso ovárico. Estos resultados indican el potencial antigestante de la prostaglandina A1. Esta parece actuar como agente luteolítico, interrumpiendo el complejo luteotrópico (relación FSH:prolactina).
    Notes: Abstract The effects of a single administration of authentic prostaglandin A1 intravaginally in early pregnant hamsters were investigated. A single dose of 1 mcg/animal given on day 4 of pregnancy inhibited the appearance of embryonic swellings when observed on day 8 of pregnancy. A significant fall (p〈0.01) in FSH with a rise (p〈0.03) in prolactin concentration in the serum and no change in LH levels were observed. The pituitary content of prolactin showed a significant decrease (p〈0.0006) with no change in FSH and LH contents. Progesterone concentration in the serum was markedly reduced (p〈0.002), along with that of the ovaries (p〈0.01). The decline in progesterone concentration coincided with the absence of corpora lutea and the embryos. However, no change in ovarian weights was observed. These results indicate the contragestive potential of prostaglandin A1. It appears to act as a luteolytic agent by disrupting the luteotropic complex (FSH:prolactin ratio).
    Type of Medium: Electronic Resource
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