Library

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
    Amsterdam : Elsevier
    Vibrational Spectroscopy 7 (1994), S. 255-264 
    ISSN: 0924-2031
    Keywords: Fluctuation model ; Hydrogen bonds ; Infrared spectrometry ; Water
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 63 (1996), S. 62-68 
    ISSN: 1432-0649
    Keywords: 42.65. Dr ; 35.80. + s
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A double-channel spectrometer, which enables to acquire ultrabroadband single-pulse spectra of liquids by Coherent Anti-Stokes Raman Spectroscopy (CARS), is described. The method used to fulfill the phase-matching condition is based on the fact that the CARS efficiency in dispersive media is the largest when the interactive waves cross each other under frequency-determined angles. The dependence of the spatial separation between the pump and Stokes beam, in front of the crossing CARS lens, due to their frequency difference is analysed. It is shown that the different spectral components of an ultrabroadband Stokes source have phase-matched the CARS process when they are laterally shifted by a conjugated prism pair and focused into the sample. The method is tested in the spectral region 2800–3800 cm−1 of a non-resonant medium (CCl4) using an ultrabroadband dye laser (1000 cm−1 FWHM). The influence of the Stokes beam spatial dispersion on the width of CARS generation is demonstrated. By this method, 1060 cm−1 wide single-pulse spectra of the OH stretching vibration of liquid water are obtained for the first time. The ratio between the resonant and non-resonant part of the third-order susceptibility in water and methanol is determined.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1573-8248
    Keywords: Saperda populnea ; Billaea irrorata ; Dolichomitus populneus ; Iphiaulax impostor ; parasitoid ; Bulgaria ; poplar clones ; Saperda populnea ; Billaea irrorata ; Dolichomitus populneus ; Iphiaulax impostor ; parasitoïde ; Bulgarie ; clones de peuplier
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé On a étudié les parasitoïdes de la petite Saperde du peuplier, en Bulgarie, le long du Danube, au cours de la période 1986–1988. Au total, 898 galles de la petite Saperde du peuplier ont été étudiées: 289 en 1986, 404 en 1987 et 205 en 1988. Certaines années, les parasitoïdes de la petite Saperde du peuplier, à savoir:Billaea irrorata Meig.(Diptera, Tachinidae), Dolichomitus populneus Ratz. (Hym.: Ichneumonidae) etIphiaulax impostor Scop. (Hym.: Braconidae) détruisaient de 13,1 jusqu'à 28,0% des larves du ravageur, ce qui réduisait leur abondance, compte tenu des autres facteurs limitants, de 56,1% jusqu'à 81,2%. La mouche tachinaire,B. irrorata réduisait l'abondance des larves de la petite Saperde du peuplier, de 93% jusqu'à 18,9%, tandis que l'ichneumonideD. populneus et le braconideI. impostor détruisaient des pourcentages insignifiants de ces mêmes larves: 0,5% jusqu'à 1,7% et 0,5% jusqu'à 2,5% respectivement. La période de vol du ravageur précédait ou coïncidait presque avec celles deD. populneus et d'I. impostor. La moucheB. irrorata apparaissait toujours la dernière et sa période de vol était étendue.
    Notes: Abstract During the period 1986–1988 the parasitoids of smaller poplar borer,Saperda populnea L. (Coleoptera, Cerambycidae) along the Danube in Bulgaria were studied. A total of 898 smaller poplar borer galls were investigated—289 in 1986, 404 in 1987, and 205 in 1988. In the particular years the parasitoids of smaller poplar borer namelyBillaea irrorata Meig.(Diptera, Tachinidae), Dolichomitus populneus Ratz. (Hym.: Ichneumonidae), andIphiaulax impostor Scop. (Hym.: Braconidae) destroyed from 13.1 up to 28.0% of the pest larvae, thus decreasing their frequency together with the other limiting factors by 56.1% up to 81.2%. The tachinid flyB. irrorata decreased the smaller poplar borer larvae frequency by 9.3% up to 18.9%, while the ichneumonoidD. populneus, and the braconoidI. impostor destroyed insignificant percentages of these larvae—0.5% up to 1.7% and 0.5% up to 2.5% resp. The flight period of the pest preceded or almost coincided with the ones ofD. populneus, andI. impostor. The flyB. irrorata always appeared last and its flight period was expanded.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...