ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    Detection of organophosphate pesticides in human body fluids by headspace solid-phase microextraction (SPME) and capillary gas chromatography with nitrogen-phosphorus detection (1996)
    Springer
    Chromatographia 42 (1996), S. 135-140 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Headspace sampling ; Solid-phase microextraction (SPME) ; Nitrogen-phosphorus detection (NPD) ; Organophosphate pesticides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Organosphosphate pesticides have been found extractable by headspace solid-phase microextraction (SPME), and the best conditions of their extraction from human whole blood and urine samples have been investigated. The body fluid samples containing nine pesticides (IBP, methyl parathion, fenitrothion, malathion, fenthion, isoxathion, ethion, EPN and phosalone) were heated at 100°C in a septum-capped vial in the presence of various combinations of acid and salts, and SPME fiber was exposed to the headspace of the vial to allow adsorption of the pesticides before capillary gas chromatography (GC) with nitrogen-phosphorus detection. The heating with distilled water/HCl/(NH4)2SO4/NaCl and with distilled water/HCl gave the best results for urine and whole blood, respectively. Recoveries of the nine pesticides were 0.8–10.6% except for phosalone (0.03%) for whole blood, and 3.8–40.2% for urine. The calibration curves for the pesticides showed linearity in the range of 50–400 ng/0.5 mL for whole blood except for malathion (100–400 ng/0.5 mL whole blood) and 7.5–120 ng/0.5 mL for urine except for phosalone (15–120 ng/0.5 mL urine) with detection limits of 2.2–40 ng/0.5 mL for whole blood and 0.8–12 ng/0.5 mL for urine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269642
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Extraction of local anaesthetics from human blood by direct immersion-solid phase micro extraction (SPME) (1996)
    Springer
    Chromatographia 43 (1996), S. 59-62 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Local anaesthetics ; Solid phase micro extraction (SPME) ; Direct immersion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Local anaesthetics have been shown to be extractable from human whole blood samples by direct immersion (DI)-solid phase micro extraction (SPME). After deproteinization with perchloric acid, the pH of the clear supernatants of human whole blood samples containing the drugs were adjusted to about 7 with 10 M NaOH in the presence of NaCl; a polydimethylsiloxanecoated SPME fiber was then immersed directly into the sample solution to allow adsorption of the drugs before capillary gas chromatography (GC) with flame ionization detection. The DI-SPME for 1-mL whole blood gave peaks for all the drugs; only a small amount of background noise appeared and this gave no problems in the detection of the drugs. Recoveries of the ten drugs from human whole blood was 0.74–19.7 %. The calibration curves for seven drugs showed linearity in the range of 0.25–12 μg mL−1 whole blood, with detection limits of 54–158 ng mL−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02272822
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Detection of ethanol in human body fluids by headspace solid-phase micro extraction (SPME)/capillary gas chromatography (1996)
    Springer
    Chromatographia 43 (1996), S. 393-397 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Solid-phase micro extraction (SPME) ; Headspace sampling ; Ethanol ; Alcohol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Ethanol has been found extractable from human whole blood and urine samples by headspace solid-phase micro extraction (SPME) with a Carbowax/divinylbenzene-coated fiber. After heating a vial containing the body fluid sample with ethanol, and isobutanol as internal standard (IS) at 70°C in the presence of (NH4)2SO4, a Carbowax/divinylbenzene-coated SPME fiber was exposed in the headspace of the vial to allow adsorption of the compounds. The fiber needle was then injected into a middle-bore capillary gas chromatography (GC) port. The headspace SPME-GC gave intense peaks for both compounds; a small amount of background noises appeared, but did not interfere with the detection of the compounds. Recoveries of ethanol and IS were 0.049 and 0.026% for whole blood, respectively, and 0.054 and 0.085% for urine, respectively. The calibration curves for ethanol showed excellent linearity in the range of 80–5000 mg L−1 for whole blood and 40–5000 mg L−1 for urine; the detection limits for both samples were 20 and 10 mg L−1, respectively. The data on actual determination of ethanol after the drinking of beer are also presented for two subjects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02271017
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Studies of nuclear second moments for pre-equilibrium nuclear reaction theories (1987)
    Springer
    The European physical journal 327 (1987), S. 421-430 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr ; 23.40.Hc ; 21.10.Ma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nuclear second moments, important inputs to pre-equilibrium reaction theories, are evaluated by assuming a simple model. The positive definite nature of the second moments is examined, and the nuclear level densities are calculated using positive definite second moments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289568
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Studies of nuclear second moments for pre-equilibrium nuclear reaction theories — Extension to finite-range residual interaction (1988)
    Springer
    The European physical journal 330 (1988), S. 265-275 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr ; 23.40.Hc ; 21.10.Ma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Study of the nuclear second moments, important inputs to pre-equilibrium reaction theories, is extended to residual interactions of finite range. The interactions are assumed to have general spin and isospin dependence. The second moments are found to be always positive definite for commonly used values of the interaction parameters. They seem to support the strong coupling limit of the pre-equilibrium reaction theory by Nishioka et al. [1], which would imply the modification of the phenomenological model used in analyzing experimental data. As an application of the second moments, it is also investigated how the nuclear level densities change with the parameter values of the residual interaction. The results show the important role of the residual interaction especially in the low energy region, which may greatly improve the agreement with experimental data at thermal neutron resonances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294869
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Average partial level density based on the random matrix model. Inclusion of realistic one-body spectrum and effect of particle escape (1989)
    Springer
    The European physical journal 333 (1989), S. 141-148 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr ; 23.40.Hc ; 21.10.Ma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of the realistic one-body spectrum is included in calculating the average partial level density, which has been so far obtained assuming degenerate one-body spectrum and GDE for the residual interaction. We show that such partial level densities are obtained by solving the extended saddle point equations which need inputs of the realistic one-body spectrum as well as the second moment of the ensemble. It is seen that the average partial level density is expressed in a convolution form of the partial level density for realistic one-body spectrum with the distribution which describes the effect by the random residual interaction. Calculations numerically performed show the improvement over the previous results. The effect of particle escape on the level density is also investigated and turns out to be practically negligible in precompound reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01565144
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Exciton level densities with spin and parity based on random matrix model (1991)
    Springer
    The European physical journal 339 (1991), S. 129-139 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr ; 23.40.Hc ; 21.10.Ma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Level densities for fixedJ π and the exciton number are evaluated for closed shell nuclei40Ca and208Pb. The single particle spectra and wave functions are generated by Woods-Saxon potentials. The effects of the residual interaction are taken into account statistically by the method of generating function and Grassmann integral. The matrix elements for the residual interaction are assumed to be random variables with Gaussian distributions whose second moments are calculated by using a zero range interaction. The second moments are evaluated for fixedJ π by ignoring the Pauli principle between active nucleons and the spectator. This approximation is shown numerically to be very good. The partial level densities are calculated using the second moments as well as independent particle model spectra. The resulting level densities spread over wider energy ranges, have a smoother energy dependence and are enhanced at low energies compared with the independent particle model densities, although the total level densities do not differ by much.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282942
    Location Call Number Expected 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...