ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 15120-15128 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Langmuir 11 (1995), S. 4180-4182 
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 7469-7477 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The influence of charge on diffusion in porous media was studied for fluorescent colloidal silica spheres diffusing in a porous glass medium. The bicontinuous porous silica glasses were optically matched with an organic solvent mixture in which both glass and tracers are negatively charged. Using fluorescence recovery after photobleaching, the long-time self-diffusion coefficient DSL of the confined silica particles was monitored in situ as a function of the ionic strength and particle to pore size ratio. At high salt concentration DSL reaches a relatively high plateau value, which depends on the particle to pore size ratio. This plateau value is unexpectedly higher than the value found for uncharged silica spheres in these porous glasses, but still significantly smaller than the free particle bulk diffusion coefficient of the silica spheres. At low salt concentration DSL reduces markedly, up to the point where colloids are nearly immobilized. This peculiar retardation probably originates from potential traps and barriers at pore intersections due to deviations from cylinder symmetry in the double layer interactions between tracers and pore walls. This indicates that diffusion of charged particles in tortuous porous media may be very different from transport in long capillaries without such intersections. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1570-7458
    Keywords: spruce budworm ; styloconic sensilla ; chemosensilla ; electrophysiology ; gustation ; sugars
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Female fourth- and sixth-instar larvae, Choristoneura fumiferana, were tested individually for the response of the sugar cell on the lateral styloconic sensillum to 25 mM/l concentrations of 12 carbohydrates. The spruce budworm showed an age-related change in responsiveness of the sugar cell. The order of stimulating effectiveness for fourth-instars was melibiose 〉 sucrose 〉 raffinose.These storage di- and trisaccharides are present in the host plant at the beginning of budbreak. Sixth-instars responded to sucrose 〉 fructose〉 m-inositol. These findings are in accordance with those of a previous behavioural study on feeding preferences of sixth-instars. The response for both melibiose and raffinose does not change from fourth- to sixth-instars; however, it does for sucrose, fructose and m- inositol.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 86 (1998), S. 89-96 
    ISSN: 1570-7458
    Keywords: spruce budworm ; amino acids ; chemosensilla ; electrophysiology ; gustation ; Lepidoptera ; Tortricidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An electrophysiological approach was used to record the responses of maxillary styloconic sensilla of fourth- and sixth-instar larvae of the spruce budworm Choristoneura fumiferana to 14 amino acids. One cell in the lateral styloconic sensillum was identified as an amino acid-sensitive neuron. All of the amino acids tested, except l-proline and l-arginine, were detected by this cell. Arginine did not evoke a response from either the medial or lateral styloconic sensilla. Proline evoked responses from a cell in the medial styloconic sensillum. It is known from previous behavioural work that l-proline is a phagostimulant and l-valine inhibits feeding in Choristoneura; we thus further characterized the responses to these two amino acids. For both instars, l-proline was detected as low as 0.001 mmol/l and the maximal response was at 50 mmol/l. Stimulation of fourth- and sixth-instar larvae with l-valine showed that the maximum firing frequency was obtained at 1 mmol/l. Above and below this concentration, firing frequency decreases. Sensory responses to the amino acids stimuli did not correlate with known behavioral responses to similar stimuli.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1570-7458
    Keywords: spruce budworm ; styloconic sensilla ; balsam fir extracts ; chemosensory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An electrophysiological study of the sensilla styloconica of the galea in Choristoneura fumiferana Clem. (Lepidoptera: Tortricidae) larvae showed a differential response between fourth- and sixth-instars to extracts of balsam fir foliage. Larvae raised on artificial diet were stimulated with the water soluble fraction of needle extracts obtained from terminal and lateral shoots of 30- and 70-yr-old balsam fir trees. An extract-sensitive neuron was found in the lateral styloconic sensillum of both instars. The lateral styloconica in the fourth-instar larvae were more sensitive to extracts from terminal than from lateral shoot foliage of both young and old trees. The lateral styloconica of sixth-instar larvae were more sensitive to lateral shoot foliage of old trees. Results are discussed with respect to their relationship to feeding preferences and feeding rates observed in a previous behavioural study.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1432-1041
    Keywords: Key words Carbamazepine ; Generic formulations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: In this study our aim was to assess pharmacokinetic effects and adverse cognitive effects of switches between generic and branded formulations of carbamazepine (CBZ). Method: Twelve patients were included in a randomized open-label, observer-blind, cross-over design with a double-baseline period, comparing three different formulations of carbamazepine in monotherapy – the innovatory branded form Tegretol and two generic forms, CBZ Pharmachemie and CBZ Pharbita. Cognitive assessment was carried out at baseline and 3 days after a cross-over. Results: Area under the curve and a number of pharmacokinetic properties (serum concentration day curves, change in serum concentration (delta scores), peak/trough concentrations and peak time) did not differ among the three CBZ formulations. Therefore, the basic assumption for this study, i.e. to test pharmacokinetic-related differences in cognitive profile, was not met. In line with these findings, none of the cognitive variables showed statistically significant differences with respect to the cognitive profile during the day. Conclusion: Switches between the investigated generic CBZ formulations and the branded product did not result in any difference in cognitive profiles. These results are not necessarily valid, though, for other generic forms of CBZ, for other types of antiepileptic drugs or for CBZ treatment in higher doses or in polytherapy.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 2 (1970), S. 435-443 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé On a examiné plus de 30 émaux au titane, de différentes origines, blancs et colorés, à l'aide du “Derivatograph”. L'emploi de creusets en thermoceram a permis d'interrompre l'essai au moment où l'on observe un changement sur les courbes d'ATD, de sortir le creuset, de pulvériser l'échantillon et d'en faire l'examen aux rayons X. Une différence importante par rapport aux observations précédentes consiste en ce que le pic exothermique indiquant la transformation anatase-rutile apparaît sur les enregistrements d'ATD de certains émaux de type anatase. Pour ceux-ci, la température correspondant au début du pic de transformation a été considérée comme température critique puisqu'au-dessous de celle-ci l'émail est stable, tandis qu'au-delà il ne l'est plus.
    Abstract: Zusammenfassung Mehr als 30 weiße und gefärbte Titanenemails verschiedener Herkunft wurden mit dem Derivatographen untersucht. Die Prüfung erfolgte in Korund-Tiegeln, die eine Unterbrechung der Untersuchungen bei Änderungen in der DTA-Kurve ermöglichten, um die pulverisierte Probe einer röntgenographischen Analyse zu unterwerfen. Es gelang, die durch die Anatase-Rutil Umwandlung hervorgerufene Spitze in der DTA-Kurve verschiedener Emails vom Anatase-Typ zu beobachten. Bei diesen Emails ist der Anfang der Umwandlungsspitze als die kritische Temperatur zu betrachten, unter welcher das Email stabil und über welcher es unstabil ist.
    Notes: Abstract Over 30 white and coloured titanium enamels of different origin were tested with a derivatograph. Thermoceram crucibles were used, which enabled the tests to be interrupted when a change was indicated by the DTA curve. The crucible was removed from the derivatograph, and the sample pulverized and studied by X-ray diffraction method. A major difference compared to previous observations was the fact that the exothermic peak indicating the anatase-rutile transformation was also found on the DTA curves of certain anatase-type enamels. With these enamels the temperature relating to the start of the transformation peak was regarded as the critical temperature, as at a temperature below this the enamel was stable, but above it unstable.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 22 (1973), S. 13-43 
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Computer routines permit the solution of eclipsing binary light curves on the Russell Model. With additional automatic point plot routines, the operator has available all necessary supervisory control for an optimum solution. A solution of a synthetic light curve, whose parameters simulate those calculated for the physical system, is an important adjunct to test convergence properties of the physical system solution. Application to EE Peg determines values ofx x andx x even though secondary minimum is only 0.08 mag. deep. First order perturbation theory is used with the Russell Model to calculate a final triaxial ellipsoid model. Solution of the CM Lac light curve shows that the data require an occultation eclipse at primary minimum, in contrast to the available nomographic solution. The point plot routines demonstrate a substantial improvement effected by the computer solution and show that the latter technique can determine limb darkening coefficients in this partially-eclipsing system.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A technique is described for the recording of action potentials from individual sensory receptors of the antenna of the spruce budworm,Choristoneura fumiferana (Clem.). The antennae of adult male spruce budworm, are shown to bear olfactory receptors which respond to the female sex pheromone, trans-11-tetradecenal. The receptors are long sensilla trichodea, identified as type 4 on the basis of electrophysiological measurements and scanning electron microscopy. A minimum concentration of 10−8mg of pheromone is required to elicit a response. Once the threshold concentration for the receptor is reached there is a correlation between stimulus concentration and the intensity of the response within the first 400 msec of the response.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...