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
  • 1
    Electronic Resource
    Electronic Resource
    Nomenclature and generation of three-periodic nets: the vector method (1984)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 42-50 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Three-periodic nets are connected graphs which permit embeddings having a threefold periodicity. To many crystal structures such nets can be meaningfully assigned and used to express the topology of the structures. It is shown that such a net can be fully characterized by a finite graph in which the edges are labelled in a suitable way. The reversal of the process of assigning a labelled finite graph to a given net can be used to generate nets of real and hypothetical crystal structures in a systematic fashion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767384000088
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Color and symmetry by A. L. Loeb (1972)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 28 (1972), S. 364-364 
    Details
    ISSN: 1600-5724
    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/S0567739472001020
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Rectifiable n-periodic maps (1979)
    Springer
    Geometriae dedicata 8 (1979), S. 127-137 
    Details
    ISSN: 1572-9168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We show that every doubly periodic planar map is isomorphic to one whose countries are convex, and that the corresponding statement is false in higher dimensions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00181483
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Calcium oxalate trihydrate in urinary calculi (1985)
    Springer
    Urological research 13 (1985), S. 281-283 
    Details
    ISSN: 1434-0879
    Keywords: Calcium oxalate trihydrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Visual examination, electron-microscopic observation and infrared-spectroscopic analysis demonstrate that the thermodynamically unstable calcium oxalate trihydrate, which supposedly plays an important role in the formation of certain urinary calculi, is a commonly occurring constituent of urinary stones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00262657
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    A potential model for fluorapatite (1981)
    Springer
    Physics and chemistry of minerals 7 (1981), S. 35-42 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract For the mineral fluorapatite, Ca10(PO4)6F2, a potential model of the polarizable ion type has been developed in order to reproduce the following physical constants: the vibrational frequencies (transverse and longitudinal), the elastic constants and the static and high frequency dielectric constants. The parameters of the model are short range force constants, ionic charges and ionic polarizabilities. The polarizable ion model was built up in three stages in order to facilitate comparison with simpler models. In the first stage a short range valence type model was set up, assuming interaction up to a distance of 3.5 Å. In the second stage this model was extended to a rigid ion model by the addition of long range Coulomb forces. In the third stage, which resulted in the polarizable ion model, the polarizabilities of the ions were also taken into account. There was good agreement between calculated and observed data. This demonstrates that even for a crystal structure as complicated as that of fluorapatite with 42 atoms per unit cell a potential model can be constructed which reproduces in a satisfactory way the above-mentioned physical constants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00308199
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    101. Zur Problematik der konservativen Gallensteinauflösung unter chirurgischer Sicht (1977)
    Springer
    Langenbeck's archives of surgery 345 (1977), S. 583-583 
    Details
    ISSN: 1435-2451
    Keywords: CDC ; Gallstones, cholesterol, surgical treatment ; CDS ; Gallensteine ; Chirurgische Behandlung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: ZusammenfaBung Reine Cholesterinsteine können mit Chenodesoxycholsäure aufgelöst werden. 208 konsekutiv gewonnene Gallensteine wurden untersucht. 93,7% enthielten Cholesterin, aber nur 10,3% waren reine Cholesterinsteine. Röntgenologisch ist eine Verifizierung zwischen reinen Cholesterinsteinen und Cholesterinsteinen mit geringem Calciumgehalt nicht möglich. Unter der Behandlung mit CDS kommt es zu einem Anstieg der Transaminasen, zu cholagenen Durchfällen und zur verstärkten Bildung von der lebertoxischen Lithocholsäure. Nach Absetzen der CDSBehandlung wird regelmäBig eine Rezidivsteinbildung beobachtet.
    Notes: Summary Pure cholesterolgallstones can be diBolved by chenodesoxycholic acid (CDC). The composition of 208 gallstones was examined: 93.7% contained cholesterol, but only 10.6% were pure cholesterol stones. Radiologically no differentiation between pure cholesterolgallstones and mixed stones with a low calcium content was poBible. With CDC there is an increase of liver enzymes, choleraic diarrhea, and hepatotoxic lithocholic acid. As a rule, recurrent stones are observed after discontinued treatment with CDC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01305545
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Magnesium ammonium phosphate monohydrate — A hitherto undetected constituent of urinary calculi (1973)
    Springer
    International urology and nephrology 5 (1973), S. 19-26 
    Details
    ISSN: 1573-2584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Magnesium ammonium phosphate monohydrate, MgNH4PO4·H2O, has been detected as a constituent of urinary calculi. The substance was identified by X-ray powder diffraction analysis, and the analysis was confirmed by comparison with synthetic material. Magnesium ammonium phosphate monohydrate may occur in secondary calculi which are formed in a strongly inflamed urinary tract. A possible mechanism of formation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02081748
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Shock-induced transformations of andalusite and kyanite powders (1980)
    Springer
    Journal of materials science 15 (1980), S. 154-160 
    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 Exposure of andalusite and kyanite powders (⩽40 μm) to high dynamic pressures revealed a strongly different behaviour of the two materials against shock. While experiments on andalusite powders yielded characteristic shock-induced phase transformations, kyanite powders did not show any phase change upon release from shock compression. X-ray patterns and infra-red spectra proved the formation of 3/2-mullite from andalusite, and infra-red spectra also indicated the formation of long-range-disordered Al2O3 and SiO2. While the formation of mullite must be associated with high (shock) temperatures, the formation of the Al2O3 + SiO2 oxide mixture may be a (shock) pressure effect. The lack of temperature-induced transformations in kyanite may be explained by the lower porosity of the sample tablets as compared to those of andalusite. The absence of highpressure transformations in kyanite is most probably due to its dense structure which is more resistant to shock waves than the more open andalusite structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552440
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Graphen und Strukturen (1980)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 304 (1980), S. 287-287 
    Details
    ISSN: 1618-2650
    Keywords: Kristalle ; Graphen und Strukturen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00488841
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Das Schwingungsspektrum der B(OH)4-Ionen im Teepleit (1966)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 343 (1966), S. 58-69 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Infrared and RAMAN spectra of teepleite, Na2[B(OH)4]Cl, were recorded. Especially helpful for the assignment of the frequencies was an IR spectrum of a thin single crystal, taken with polarized radiation. The assignment was made on the basis of a factor group analysis.
    Notes: Infrarot- und RAMAN-Spektren von Teepleit, Na2[B(OH)4]Cl, wurden aufgenommen. Eine besondere Hilfe für die Zuordnung der infrarot-aktiven und eines Teils der RAMAN-aktiven Schwingungen war das Infrarot-Spektrum, das von einem dünnen Einkristall mit polarisierter Strahlung registriert wurde. Bei der Zuordnung wurden die Lagegruppen- und die DAVYDOV-Aufspaltung berücksichtigt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19663430109
    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...