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
    Folding onto Copper(II) of a Flexible Bis-Chelating 4-Acyl-pyrazol-5-olate (1995)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 51 (1995), S. 53-57 
    Details
    ISSN: 1600-5759
    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/S0108270194008024
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    An Historical Critique of the Emergence and Evolution of Ernesto Che Guevara's Foco Theory (1995)
    Cambridge : Cambridge University Press
    Journal of Latin American studies 27 (1995), S. 593-624 
    Details
    ISSN: 0022-216X
    Source: Cambridge Journals Digital Archives
    Topics: Political Science
    Notes: AbstractThis article provides an analysis of Ernesto Che Guevara's theory of guerrilla warfare, the foco. The numerous changes to the original foco thesis, as presented in Guerrilla Warfare (1960), are examined in detail covering two dozen articles, speeches, essays, interviews and books authored by Guevara, Castro and Debray while stressing their relation to national and international politics. The author argues that there was an apparent discourse between Cuban politics and the numerous changes in Guevara's writings. Juxtaposing changes to the foco theory from 1960 to 1967, to Cuban historical events, reflects the political expedience of the 1960s and the primary interests of the fidelistas, specifically Guevara.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0022216X00011627
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Methane emissions from a landfill measured by eddy correlation using a fast response diode laser sensor (1995)
    Springer
    Journal of atmospheric chemistry 20 (1995), S. 141-162 
    Details
    ISSN: 1573-0662
    Keywords: Methane ; carbon dioxide ; flux ; landfill ; diode laser ; eddy correlation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract We describe a fast response methane sensor based on the absorption of radiation generated with a near-infrared InGaAsP diode laser. The sensor uses an open path absorption region 0.5 m long; multiple pass optics provide an optical path of 50 m. High frequency wavelength modulation methods give stable signals with detection sensitivity (S/N=1, 1 Hz bandwidth) for methane of 65 ppb at atmospheric pressure and room temperature. Improvements in the optical stability are expected to lower the current detection limit. We used the new sensor to measure, by eddy correlation, the CH4 flux from a clay-capped sanitary landfill. Simultaneously we measured the flux of CO2 and H2O. From seven half-hourly periods of data collected after a rainstorm on November 23, 1991, the average flux of CH4 was 17 mmol m−2 hr−1 (6400 mg CH4 m−2 d−1) with a coefficient of variation of 25%. This measurement may underrepresent the flux by 15% due to roll-off of the sensor response at high frequency. The landfill was also a source of CO2 with an average flux of 8.1 mmol m−2 hr−1 (8550 mg CO2 m−2 d−1) and a coefficient of variation of 26%. A spectral analysis of the data collected from the CH4, CO2, and H2O sensors showed a strong similarity in the turbulent transfer mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696555
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Multifunctional Calix[4]arenes Containing Pendant Amide and Phosphoryl Groups: Their Use as Extracting Agents and Carriers for Alkali Cations (1997)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 27 (1997), S. 127-140 
    Details
    ISSN: 1573-1111
    Keywords: Alkali cations ; calixarene ; amide ; phosphine oxide ; complexation ; extraction ; transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The complexing, extracting and mobile carrier properties of the tetra(phosphine oxide)-calix[4]arene 1 and the hybrid diamide-di(phosphine oxide)-calix[4]arene 2 were studied. Both ligands give 1 : 1 complexes with alkali cations in THF as shown by the picrate method. 1H NMR experiments were run to follow encapsulation of sodium and potassium cations. The corresponding spectra indicate C2-symmetrical structure. The observed extraction orders of the alkali picrates were as follows K+〉Rb+〉Li+〉Cs+〉Na+ for 1 and Li+〉Na+〉K+〉Rb++ for 2. Transport kinetics was analysed by means of a model which assumes pure diffusion and which allows the evaluation of mass transfer coefficients in all systems. These coefficients and their influences on the transport rate are discussed in terms of size of the transporting species in the liquid membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007975928021
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Calix[4]arenes with Pendant Amide and Phosphine Oxide Functionalities: Use as Extractive Agents and Carriers for Silver (I) Ions (1997)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 29 (1997), S. 137-151 
    Details
    ISSN: 1573-1111
    Keywords: Calixarene ; amide ; phosphine oxide ; silver ; extraction ; transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The solvent extraction properties towards Ag+ of5,11,17,23-tetra-tert-butyl-25,27-diX-26,28-bis(diphenylphosphinoylmethoxy)calix[4]arenes (X = CH2C(O)NEt2 (1), CH2P(O)Ph2 (2), CH3 (3), CH2C(O)Et (4))have been studied. Each ligand forms a 1 : 1 complex with silver(I). Ligand1, which bears two amide functionalities, is the most efficacious,emphasizing the crucial role played by the polar amide groups. The rate oftransport of AgNO3 through a bulk liquid membrane with this ligand ascarrier was shown to be superior to that of DC18C6, a structurally-relatedmulti-oxygen donor carrier. NMR and IR data suggest that Ag+ is coordinatedto each of the oxygen atoms in the ligand leading to an encapsulatedstructure [Ag ⊂ 1]+.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007980931959
    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...