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  • 1
    Call number: M 94.0697
    Type of Medium: Monograph available for loan
    Pages: xvi, 490 S.
    ISBN: 1568810393
    Classification:
    C.1.8.
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Wellesley, Massachusetts : Peters
    Call number: M 94.0698
    Type of Medium: Monograph available for loan
    Pages: xv, 528 S.
    ISBN: 1568810407
    Classification:
    C.1.8.
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 3
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    Saskatoon : Periodicals Archive Online (PAO)
    Canadian journal of history/Annales canadiennes d'histoire. 5:2 (1970:Sept.) 127 
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Constructive approximation 7 (1991), S. 469-484 
    ISSN: 1432-0940
    Keywords: 65D07 ; 65D10 ; 41A15 ; Splines ; Partial splines ; Inf-convolution ; Smoothing ; Interpolation ; Splines with discontinuities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Inf-convolution splines have been introduced for the representation of functions presenting singularities (discontinuities, peaks, etc⋯). In these cases, the energy functional to be minimized is the inf-convolution of a semi-Hilbertian function and of the indicator function of a linear subspace containing the singularities. This principle is extended here to interpolating or smoothing splines based on the inf-convolution of a finite number of arbitrary semi-Hilbertian functions. Characterization theorems are given using the notion of semikernel. Several algorithms are proposed.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Les recherches histochimiques sur l'ATPase-Na+-K+ en microscopie optique ont permis de mettre en évidence une forte activité au niveau de l'épithélium pseudobranchial des Téléostéens. Cette activité est localisée sur la membrane interne des cellules pseudobranchiales, qui fait face aux larges espaces extracellulaires de la région interlamellaire. Cette région interlamellaire contient de nombreuses terminaisons nerveuses afférentes. La spécificité de ces localisations est discutée.
    Notes: Summary The histochemical studies of the ATPase-Na+-K+, at light microscopic level, showed a strong activity in the pseudobranchial epithelium of a teleost fish. This activity is located on the inward membrane of the pseudobranchial cells facing the large extracellular spaces of the intralamellar areas. These intralamellar areas contain numerous afferent nerve endings. The reality of these localizations is discussed.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé On a essayé de localiser histochimiquement l'anhydrase carbonique dans les chémorécepteurs artériels des Mammifères, des Batraciens et des Poissons. On a utilisé la modification apportée par Hansson à la technique de Häussler. 1. Chez le Lapin, l'anhydrase carbonique est localisée au niveau des lobules de cellules chémoréceptrices du glomus carotidien. 2. Chez la Grenouille, on a montré la présence d'anhydrase carbonique exclusivement dans la région du labyrinthe carotidien contenant les cellules chémoréceptrices. Il n'a pas été possible de déterminer le type des cellules dans lesquelles se produit la réaction. 3. On a pu montrer la localisation intracellulaire de l'anhydrase carbonique dans les cellules pseudobranchiales des Téléostéens. Cette dernière localisation suggère fortement que l'activité enzymatique est liée au système de tubules qui s'ouvrent au pôle vasculaire des cellules.
    Notes: Summary Hansson's modification of Häussler's technique was used to demonstrate the carbonic anhydrase activity in arterial chemoreceptor tissues of Rabbits, Frogs and some Teleost Fish at the light microscope level. 1. In Rabbits, the presence of carbonic anhydrase was found only in chemoreceptor areas of the carotid body. 2. In Frogs, the enzyme was located only in the carotid labyrinth area that contain chemoreceptor cells. In Rabbits, as in Frogs, it was difficult to ascertain whether type I or II cells, or both showed some activity. 3. Satisfying evidence was obtained concerning the intracellular location of enzymatic activity inside the Teleost pseudobranchial cells. This location suggests strongly that the carbonic anhydrase activity is related to the tubules opening on the vascular side of these cells.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-5168
    Keywords: fish ; chloride cell ; morphology ; kinetics ; Km ; Jmax ; acid-base
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Marked morphological responses occur in the gills of freshwater rainbow trout in response to experimental acid-base disturbance and these responses play an important role in acid-base correction. Compensated respiratory acidosis induced by 70h exposure to environmental hyperoxia (elevated water PO2) caused a 33% decrease in branchial chloride cell fractional surface area (CCFA). Metabolic alkalosis induced by normoxic recovery (6h) from hyperoxia (72h) caused a 50% increase in CCFA, whereas metabolic alkalosis induced by infusion (19h) of NaHCO3 caused a 70% rise. However, the largest increase (135%) in CCFA was seen in response to infusion (19h) of HCl. NaCl infusion had no effect. A particular goal was to assess the relative importance of changes in CCFA vs. changes in internal substrate (HCO3 −) availability in regulating the activity of the branchial Cl−/HCO3 − exchange system. For each of the experimental treatments, the accompanying blood acid-base status and branchial transport kinetics (Km, Jmax) for Cl− uptake had been determined in earlier studies. In the present study, a positive linear relationship was established between CCFA and JCl− max in individual control fish in the absence of an acid-base disturbance. By reference to this relationship, observed changes in JCl− max during metabolic acid-base disturbances were clearly due to changes in both CCFA and internal substrate levels (plasma [HCO3 −]) with the two factors having approximately equal influence.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-5168
    Keywords: TEM ; SEM ; LM ; chloride cell ; cortisol ; growth hormone ; morphometry ; ion poor water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The aim of this work was to determine the kinetics of the dramatic development of the gill chloride cells (CCs) during adaptation of the salmonid Oncorhynchus mykiss to an ion-poor environment. To monitor cell division, the incorporation in the mitotic cell DNA of bromo-deoxyuridine (BrdUrd) was visualized with a monoclonal antibody. The density of labelled nuclei was used as an index of cellular division (proliferation), concomitantly with morphometry of phenotypic changes monitored with SEM. In the filament epithelium, a phase of CC differentiation occurred within 12h after the transfer, followed by a delayed phase of cell proliferation (48h). In the lamellar epithelium, the present study demonstrates the absence of cell proliferation after ion-poor water transfer. The conclusion is that proliferation (mitosis) is important in the primary filament whereas differentiation and migration (from the filament) is the main mechanism for the appearance of CCs on the secondary lamellae. The present study suggests that cortisol promoted differentiation, but not division, of cells. CCs, presumably premature, were stained by anti-cortisol monoclonal antibody indicating the presence of cortisol. No mature CCs were stained. Growth hormone (oGH, ratGH) increased the rate of cell division both in lamellar and filament epithelium.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Numerical algorithms 15 (1997), S. 373-383 
    ISSN: 1572-9265
    Keywords: Chebyshev–Bézier points ; Chebyshev splines ; shape parameters ; shape effects ; geometrical design ; 65D17
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract A parametric spline curve is defined whose restriction to each sub-interval belongs to a 4-dimensional piecewise Chebyshev subspace depending on coefficients which play the role of shape parameters.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 259 (1990), S. 429-442 
    ISSN: 1432-0878
    Keywords: Gill ; Cortisol ; Chloride cells ; Ionic uptake ; Salmo gairdneri (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Daily intramuscular injection of cortisol (4 mg kg−1 body weight) in rainbow trout,Salmo gairdneri, for 10 days caused significant increases in the number and individual apical surface area of gill chloride cells per mm2 of filament epithelium. Concomitantly, whole body influxes of sodium (Na+) and chloride (Cl−) increased. Acute (3 h) intra-arterial infusion of cortisol did not affect whole body Na+ or Cl− influx. A significant correlation was observed between both Na+ and Cl− influxes and the fractional apical surface area of filament chloride cells in control, sham (saline-injected) and experimental (cortisol-injected) fish. The chloride cells displayed similar ultrastructural modifications in trout undergoing cortisol treatment as in trout transferred to ion-deficient water. These findings suggest the existence of structure/function relationships in which branchial chloride cell morphology is an important determinant of Na+ and Cl− transport capacity. We conclude that chronic cortisol treatment enhances whole body Na+ and Cl− influxes by promoting proliferation of branchial chloride cells. The results of correlation analysis indicate that the chloride cell is an important site of NaCl uptake in freshwater rainbow trout.
    Type of Medium: Electronic Resource
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