Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • 1980-1984  (6)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    A sensitive and inexpensive high-performance liquid chromatographic assay for tyrosine hydroxylase (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 809-811 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We describe a highly sensitive assay method for tyrosine hydroxylase (TH) using high-performance liquid chromatography with amperometric determination. This assay method could be applicable to any tissues with low enzyme activity, such as rat cerebellum. We also describe the kinetic properties of TH in rat cerebral cortex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01985652
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Irradiation-induced defects in β''-alumina examined by 1 MV high-resolution electron microscopy (1981)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 37 (1981), S. 51-61 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The defect blocks formed in β''-alumina by electron irradiation are examined by 1 MV high-resolution electron microscopy. In order to explain the fact that two distinctly different types of defect images appear even in a single 1 MV micrograph, a new structural model is constructed in place of the two models so far reported. In the model proposed, two spinel-like blocks on either side of the eliminated conduction plane are directly combined by the vectors including x, y components to form cubic close packing of oxygen layers in the resultant defect blocks. The arrangements of cations in the defect block are slightly different from those expected from the spinel structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739481000107
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Circular diffuse scattering from a niobium tungsten bronze, 3Nb2O5.8WO3, studied by 1 MV higher-resolution electron microscopy (1980)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 13 (1980), S. 141-147 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A niobium tungsten bronze crystal with a nominal composition 3 Nb2O5.8WO3 gives circular diffuse scattering in the electron diffraction pattern. The diffuse rings change shape and size when the crystal is reduced at high temperature. The observations are explained by improving the cluster model proposed by De Ridder, Van Tendeloo, Van Dyck & Amelinckx [Phys. Status Solidi A (1977), 41, 555–560]; the present clusters are composed of nine pentagonal-tunnel sites. The 1 MV high-resolution electron microscope images reveal that the clusters have several different atomic arrangements and compositions. The relation between the clusters and the micro-domains, formed in the initial stage of long-range ordering, is clarified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889880011752
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Reduction in a niobium tungsten bronze, 2Nb2O5.7WO3, studied by 1 MV HRTEM (1982)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 15 (1982), S. 323-329 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: 1 MV high-resolution transmission electron microscopy (HRTEM) reveals that the reduction in a niobium tungsten bronze, 2Nb2O5.7WO3, is initiated by the release of a small amount of oxygen from the –M–O–M–O– strings in the pentagonal tunnels. Its content can be measured from the weight change. At the second stage of reduction the ordered structure of 2Nb2O5.7WO3 is destroyed, i.e. the ReO3-type structure at the center of the unit cell disappears. As a result an apparently disordered matrix appears, in which isolated unit cells of 2Nb2O5.7WO3 and 4Nb2O5.9WO3 are irregularly formed. At the third stage the microdomains of 4Nb2O5.9WO3 appear and grow. The presence of oxygen vacancies in the strings at each stage is revealed by the technique utilizing the knock-on of atoms by the impact of electrons. The number of knocked-on atoms is analyzed with the help of computer simulation on image contrast. Circular diffuse scattering is excited from the disordered matrix and its origin is related to the clusters composed of nine tunnel sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889882012059
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Structure of U–W oxides investigated by means of 1 MV high-resolution electron microscopy (1983)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 575-579 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768183003006
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Phase relationships in the system Si3N4-SiO2-La2O3 (1982)
    Springer
    Journal of materials science 17 (1982), S. 2359-2364 
    Details
    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 Phase relationships in the system Si3N4-SiO2-La2O3 have been investigated after cooling from 1700° C. Two phases, 2Si3N4·La2O3 (monoclinic) and La5 (SiO4)3N (hexagonal), were identified; the other two phases in the system, LaSiO2N (monoclinic) and La4Si2O7N2 (monoclinic), were found to dissociate to La5 (SiO4)3N and a glass after cooling from temperatures above 1650° C. The unit cells of 2Si3N4·La2O3, LaSiO2N and La4Si2O7N2 have been determined and compared with those of preceding works. The results are discussed in relation to the intergranular phases observed when Si3N4 is sintered with La2O3 additions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543745
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...