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
  • Electronic Resource  (15)
  • 1985-1989  (14)
  • 1960-1964  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis, spectroscopic studies, and crystal structure of theophyllinium tetrabromopalladate(II) (1989)
    Springer
    Journal of chemical crystallography 19 (1989), S. 755-763 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The theophyllinium tetrabromopalladate(II), [Thph]2PdBr4, has been synthesized and its molecular structure has been determined by single crystal X-ray diffraction. The salt crystallizes in the monoclinic space group C2 with two formula units in a cell of dimensionsa=11.074(1),b=8.545(2),c=11.804(2) Å;β=95.22(1)°,V=1112.3(4) Å3,D c=2.353 mg m−3,D exp=2.352 mg m−3,M w=788.4, μ(MoKα)=84.5 cm−1,F(000)=752. The structure has been refined by full-matrix least-squares techniques to a final value of theR factor of 0.058 based on 907 independent intensities. The compound consists of theophyllinium cations protonated at N(9). The [PdBr4]2− anion is planar, with distances Pd-Br(1)=2.441(12) and Pd-Br(2)=2.412(6) Å, and Br(1)-Pd-Br(2) and Br(1)-Pd-Br(3) angles of 90.34(14)° and 89.66(14)°, respectively. The1H-NMR spectrum of [Thph]2PdBr4 in DMSO-d6 (300 MHz) is consistent with the observed solid-state structure, and its thermal behavior shows two steps: (i) a dehalogenation process about 327°C and (ii) a rapid pyrolitic decomposition in the 340–575°C temperature range giving PdO as final product.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179848
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Formation and structure of 5/1/2 zinc hydroxychlorosulfate (1964)
    Springer
    Naturwissenschaften 51 (1964), S. 482-482 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00633102
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Young high-temperature granulites from the base of the crust in central Mexico (1989)
    [s.l.] : Nature Publishing Group
    Nature 342 (1989), S. 265-268 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] So far most studies of xenoliths have focused on characterization of samples from the Earth's upper mantle6, and only limited mineralogical and geochemical data have been obtained on xenoliths believed to be from the lower crust. In addition, most studies of deep crustal xenoliths have concentrated ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/342265a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Discontinuity of the Wilson string tension in the 4-dimensional lattice pure gauge Potts model (1989)
    Springer
    Communications in mathematical physics 126 (1989), S. 103-131 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract We consider the 4-dimensionalq-state pure gauge Potts model. Forq large enough, we give a new proof of the existence of a unique coupling constant β t , where a first order phase transition occurs. Moreover we prove the following new results: The string tension is discontinuous at β t , the Wilson parameter exhibits at β t a direct transition from an area law decay (quark confinement) to a perimeter law decay (quark deconfinement).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02124333
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Phases coexistence and surface tensions for the potts model (1986)
    Springer
    Communications in mathematical physics 105 (1986), S. 527-545 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract Theq states Potts model exhibits a first order phase transition at some inverse temperature β t between “ordered” and “disordered” phases forq large as proved in [1]. In space dimension 2 we use theduality transformation as aninternal symmetry of the partition function at β t to derive an estimate on the probability of a contour. This enables us to prove the preceding result and the following new results: (i) The discontinuity of the mass gap at β t . (ii) The existence of astrictly positive surface tension between two ordered phases up to β t . (iii) The existence of a non-zero surface tension between an “ordered” and the “disordered” phase at β t .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01238932
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Amplified expression of ribulose bisphosphate carboxylase/oxygenase in pBR322-transformants of Anacystis nidulans (1988)
    Springer
    Archives of microbiology 151 (1988), S. 59-64 
    Details
    ISSN: 1432-072X
    Keywords: Ribulose bisphosphate carboxylase/oxygenase (RuBisCO) ; pBR322-transformants ; Anacystis nidulans ; Growth ; RuBisCO amplification ; Plasmid-chromosomal recombination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Prior research suggested that the genes for large (L) and small (S) subunits of ribulose bisphosphate carboxylase/oxygenase (RuBisCO) are amplified in ampicillin-resistant pBR322-transformants of Anacystis nidulans 6301. We now report that chromosomal DNA from either untransformed or transformed A. nidulans cells hybridizes with nick-translated [32P]-pBR322 at moderately high stringency. Moreover, nick-translated [32-P]-pCS75, which is a pUC9 derivative containing a PstI insert with L and S subunit genes (for RuBisCO) from A. nidulans, hybridizes at very high stringency with restriction fragments from chromosomal DNA of untransformed and transformed cells as does the 32P-labeled PstI fragment itself. The hybridization patterns suggest the creation of two EcoRI sites in the transformant chromosome by recombination. In pBR322-transformants the RuBisCO activity is elevated 6- to 12-fold in comparison with that of untransformed cells. In spite of the difference in RuBisCO activity, pBR322-transformants grow in the presence of ampicillin at a similar initial rate to that for wild-type cells. Growth characteristics and RuBisCO content during culture in the presence or absence of ampicillin suggest that pBR322-transformants of A. nidulans 6301 are stable. The data also collectively suggest that a given plasmid in the transformed population replicates via a pathway involving recombination between the plasmid and the chromosome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00444670
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Minimal generation of basic open semianalytic sets (1988)
    Springer
    Inventiones mathematicae 92 (1988), S. 409-430 
    Details
    ISSN: 1432-1297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01404461
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Banding structures in induced morphology crystal aggregates of CaCO3 (1987)
    Springer
    Journal of materials science 22 (1987), S. 3095-3102 
    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 Average radial growth rates in induced morphology crystal aggregates (IMCA) of CaCO3 with sheaf-of-wheat morphologies range between 33.4 and 111 μm/day. The growth process has not been found to be diffusion-controlled. Banding structures appearing in this kind of IMCA are explained just like rhythmic structures similar in origin to Liesegang rings, but the banding law in this case being modified by the matrix effect. Genetical models explaining the formation of ribbons with different particle density are also proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161169
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Facies control of strata-bound ore deposits in carbonate rocks: The F-(Pb-Zn) deposits in the Alpine Triassic of the Alpujárrides, southern Spain (1987)
    Springer
    Mineralium deposita 22 (1987), S. 216-226 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The strata-bound fluorite-(barite-)Pb-Zn ore deposits occurring within the more than 3,000 m thick Alpujárride Carbonate Formation of the Betic Cordillera, southern Spain, are linked to two defined stratigraphic positions (within the Anisian and at the Ladinian-Carnian transition) and to definite sedimentary contexts. These are highly restricted lagoons isolated from the open sea by calcarenitic barriers with noticeable development of algal mats in their inner margins. Preevaporitic deposition conditions are usually recognized. The ore-bearing horizons are located either at the transition from evaporitic to normal marine deposition (as in the case of the Anisian ore-bearing horizon) or at the transition from normal marine to evaporite deposition (as in the case of the uppermost Ladinian to lowermost Carnian ore-bearing horizon). These vertical facies changes correspond also to the transitions from predominantly terrigenous (continental and/or coastal) sedimentation to marine carbonate sedimentation (Anisian ore deposits) and vice versa (upper Ladinian-lower Carnian). It is proposed that the ore deposits in the Triassic Alpujárride Formation are controlled by certain facies associations in the lagoonal environment. The depositional environment determines the hydrologic regimes responsible for early diagenetic formation of fluorite and of the related ore minerals in a way similar to that of early-diagenetic dolomite. This hypothesis is consistent with field and petrographic observations and with available geochemical and itotopic data reported in other works. The present investigation intends to underline the role played by surface-linked ore formation processes, i.e., by ore-forming processes essentially linked to the environments in which sedimentation and early diagenesis takes place, in the genesis of numerous strata-bound Zn-Pb-(F-Ba) ore deposits in carbonate rocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206613
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    A complex chromosomal polymorphism in Gobius fallax (Gobiidae, Perciformes) (1988)
    Springer
    Genetica 76 (1988), S. 65-71 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chromosome analysis of 53 specimens from a population of Gobius fallax has revealed inter- and intra-individual variation in the diploid number (2n=38–43) arising mainly through Robertsonian translocations. The presence of a small biarmed chromosome in a few cells from 3 males as well as the numerous multivalent configurations in meiotic plates and the apparent association between the NOR-chromosomes and other acrocentrics suggest that this polymorphism has an inherited as well as a somatic origin and that some translocations may involve more than two acrocentric pairs simultaneously.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00126011
    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...