Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 0741-0581
    Keywords: Modulation ; Interfaces ; Order ; Analytical electron microscopy ; Atom probe field-ion microscopy ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Notes: A comparison of transmission electron microscopy (TEM) and atom probe field-ion microscopy (APFIM) is presented with respect to the interpretation of complex microstructures, phase identification, determination of crystallographic order, and analysis of interfaces. The capabilities, spatial resolutions, and limitations of each technique are discussed with examples taken from combined analytical electron microscopy (AEM) and APFIM studies. Both techniques are extremely powerful for routine characterization of a wide range of materials, although care must be exercised in experimentation and interpretation. The combined use of TEM and APFIM is synergistic and extends their individual capabilities from the macro scale to the atomic level.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 0002-9106
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Morphometric analyses of liver parenchymal cells were performed on male albino rats fed a semipurified diet supplemented with two levels of copper and zinc. These metals were administered in demineralized drinking water to four groups of animals at two levels. (1) 0.25 μgm Cu/ml, 2.5 μgm Zn/ml, and (2) 1.0 μgm Cu/ml, 10 μgm Zn/ml. Cadmium, also administered in the drinking water daily to rats at 17.2 μgm cadmium/ml, was given to one group of animals on each of the two semipurified diets. Two groups of rats were given laboratory chow plus 17.2 μgm Cd/ml for 71 days and for 280 days.Volume densities of all organelles diminished significantly when levels of copper and zinc were lowest. Surface densities of rough and smooth endoplasmic reticulum were significantly decreased.Higher levels of copper and zinc produced morphologic and morphometric parameters which fell just below those obtained for rats fed chow. Glycogen accumulation was highest when the levels of metal were low. Lipid inclusions were more frequent with semipurified diets than with chow.Hepatocytes from rats fed the semipurified diet with low copper and zinc plus cadmium demonstrated a significant increase in smooth endoplasmic reticulum compared to animals fed the semipurified diet alone. The smooth endoplasmic reticulum changed little when cadmium was given to rats receiving adequate copper and zinc. Smooth endoplasmic reticulum increased when diets included chow and cadmium whereas rough endoplasmic reticulum decreased.Cup-shaped and elongated mitochondria with longitudinal cristae appeared in hepatocytes from animals fed chow with cadmium. These were not seen with semipurified diets and cadmium.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Mature male rats were injected with radioiron, which labeled immature red cells that were in the stage of hemoglobin synthesis at the time. Washed cells were subjected to lysis by hypotonic saline at 14 intervals ranging from 1 to 85 hours after 59Fe injection. Lysis curves were determined colorimetrically (for the whole population) and by scintillation counting of 59Fe gamma rays (for the labeled population). Newly labeled rat red cells are much more resistant than mature erythrocytes. The mature curve of osmotic resistance is acquired about 67 hours after injection. The delivery of labeled cells continues for more than 36 hours, so the maturation of osmotic properties of a typical rat red cell takes about 30 hours from entry into the circulation. Washed dog cells behave in similar fashion but delivery continues for three days and the mature lysis curve does not appear until five days after labeling, so that maturation takes about two days. Preincubation of cells is requisite for the appearance of osmotic resistance, but the basis of the incubation effect is not yet known.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...