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
Filter
  • Organic Chemistry  (3)
  • Aerospace Medicine  (1)
  • Atomic and molecular collisions and interactions  (1)
  • 1
    Publication Date: 2011-03-17
    Description: Author(s): Annemieke Petrignani, Simon Altevogt, Max H. Berg, Dennis Bing, Manfred Grieser, Jens Hoffmann, Brandon Jordon-Thaden, Claude Krantz, Mario B. Mendes, Oldřich Novotný, Steffen Novotny, Dmitry A. Orlov, Roland Repnow, Tobias Sorg, Julia Stützel, Andreas Wolf, Henrik Buhr, Holger Kreckel, Viatcheslav Kokoouline, and Chris H. Greene High-resolution dissociative recombination rate coefficients of rotationally cool and hot H_{3}^{+} in the vibrational ground state have been measured with a 22-pole trap setup and a Penning ion source, respectively, at the ion storage-ring TSR. The experimental results are compared with theoretical... [Phys. Rev. A 83, 032711] Published Wed Mar 16, 2011
    Keywords: Atomic and molecular collisions and interactions
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 848-856 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Physico-chemical Analysis of the Hydrolysis of N-(2-Cyanethylene-)ureaBy means of pulse-polarography, infrared and n.m.r.-spectroscopy and electronattachment-mass-spectroscopy the hydrolysis of N-(2-cyanethylene-)urea (BA 1) under relatively mild conditions has been evidenced (pH 5,6 to 9.0; T = 37° C and 22° C). With rising pH value the rate of hydrolysis increases. At pH 5.6 the hydrolysis is very slow (half life time ca. 6 days), but condensation products are already demonstrable. At pH 9.0 nearly all of BA 1 molecules are hydrolysed within 2 days under splitting of the heterocycle and formation of various hydrolysis products. On the middle pH range from 7.3 to 8.3 the formation of 2-cyanaziridine was followed and after cycle splitting various resultant products were observed. The half life time of BA 1 hydrolysis at pH 7.3 and T = 37° C has been determined to 103 ± 1 hours (0.144 m BA 1, phosphate buffer).
    Notes: Mit Pulspolarographie, Infrarot- und NMR-Spektroskopie sowie Elektronenanlagerungs-Massenspektrographie wurde die Hydrolyse von N-(2-Cyanäthylen-)harnstoff (BA 1) unter noch relativ milden Bedingungen (pH 5,6 bis 9,0; T = 37°C und 22°C) nachgewiesen. Die Hydrolysegeschwindigkeit nimmt mit steigendem pH-Wert zu. Bei pH 5,6 erfolgt die Hydrolyse sehr langsam (Halbwertszeit etwa 6 Tage), wobei auch schon Kondensationsprodukte nachweisbar sind. Bei pH 9,0 ist bereits nach 2 Tagen BA 1 unter Ringspaltung weitgehend hydrolysiert, und eine Reihe Kondensationsprodukte sind entstanden. Im mittleren pH-Bereich von 7,3 bis 8,3 wurde das Auftreten von 2-Cyanaziridin, aber auch schon Ringspaltung und hydrolytische Folgeprodukte beobachtet. Die Halbwertszeit der BA 1-Hydrolyse konnte bei pH 7,3, 37°C für eine 0,144 molare Lösung in Phosphatpuffer zu 103 ± 1 h bestimmt werden.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 522-525 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polarographic Differentiation between 6-Azalumazines and 1,2,4-Triazines
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 270-278 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polarographic Reduction of β-Aminovinylimines of the Indene SeriesThe mechanism of electrolytic reduction of aminovinylimine (AVI) is suggested, based on results of the identification of electrolysis products and on the dependence of polarographic curves. It is shown that this mechanism becomes complicated by the kinetics of hydrolysis of starting substances and intermediates. The determination of complex forming constants for AVI and bovine serum albumine is determined and compared by polarography and spectroscopy.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2011-08-24
    Description: The response of skeletal muscle to unweighting was studied in six healthy males who were subjected to four weeks of lowerlimb suspension. They performed three bouts of 30 consecutive maximal concentric knee extensions, before unloading and the day after (POST 1), 4 days after (POST 2) and 7 weeks after (REC) resumed weight-bearing. Peak torque of each contraction was recorded and work was calculated as the mean of the average peak torque for the three bouts and fatigability was measured as the decline in average peak torque over bouts. Needle biopsies were obtained from m. vastus lateralis of each limb before and at POST 1. Muscle fibre type composition and area, capillarity and the enzyme activities of citrate synthase (CS) and phosphofructokinase (PFK) were subsequently analysed. Mean average peak torque for the three bouts at POST1, POST2 and REC was reduced (P 〈 0.05) by 17, 13 and 7%, respectively. Fatigability was greater (P 〈 0.05) at POST2 than before unloading. Type I, IIA and IIB percentage, Type I and II area and capillaries per fibre of Type I and II did not change (P 〉 0.05) in response to unloading. The activity of CS, but not PFK, decreased (P 〈 0.05) after unloading. The weight-bearing limb showed no changes in the variables measured. The results of this study suggest that this human lowerlimb suspension model produces substantial impairments of work and oxidative capacity of skeletal muscle. The performance decrements are most likely induced by lack of weight-bearing.
    Keywords: Aerospace Medicine
    Type: Clinical physiology (Oxford, England) (ISSN 0144-5979); Volume 13; 4; 337-47
    Format: text
    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...