Go toArchive
Browse byFacets
Bookbag ( 0 )
'Valine' in keywords
Results  2 Items
Sorted by   
Publication Year
1997 (1)
1985 (1)
1Author    A. R. Ofial, S.-Q Dou, V. G. Krishnan, H. Paulus, H. Fuess, Al WeissRequires cookie*
 Title    X-Ray and 35 C1 NQR Studies on the Trichloroacetyl Group in Covalent and Ionic Compounds of L-Valine and DL-Valine  
 Abstract    The crystal structures and 35 C1 NQR of trichloroacetyl-DL-valine (1), trichloroacetyl-L-valine (2), as well as the salts of trichloroacetic acid with DL-valine (3) and L-valine (4) have been investigated. Crystal data are for (1): Monoclinic, C2/c, a= 15.835(4) Ä, b= 10.481 (3) Ä, c = 14.046(4) A, /? = 103.28(1), Z = 8; (2): Orthorhombic, P2 1 2 1 2 1 , a = 12.117(3) Ä, 6=10.896(3) Ä, c= 8.718(2) Ä, Z = 4; (3): Triclinic, PI, a= 17.269(3) Ä, 6 = 8.504(3) Ä, c = 10.427(4) A, a = 105.38(2), £ = 96.98(2), y = 96.24(2), Z = 2; (4): Monoclinic, P2 1? a = 10.378(4) A, 6 = 20.349(8) A, c= 11.890(5) A, B = 95.28(2), Z = 8. The onset of rotational motion within the trichloroacetyl groups bleaches out 35 C1 NQR lines between 115 K and 185 K for (l)-(4). While TCA-L-valine (1), TCA-DL-valine (2), and TCA*) • DL-valine (+) (3) do not show any phase transition in the temperature range 77 K to 295 K, TCA <_) • L-valine (+) (4) shows more than one phase transition above 77 K before the three NQR signals bleach out at 164 K. 
  Reference    Z. Naturforsch. 52a, 249—258 (1997); received August 30 1996 
  Published    1997 
  Keywords    35 C1 NQR study, trichloroacetyl, valine, crystal and molecular structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0249.pdf 
 Identifier    ZNA-1997-52a-0249 
 Volume    52 
2Author    G. Gundlach, E. L. Sattler, U. W. AgenbachRequires cookie*
 Title    Gewinnung trägerfreier Syntheseprodukte in bestrahltem Valin durch heiße 11C-Atome aus (y, n)-Kernreaktionen Carrierfree Synthesis Products from Irradiated Valine by Means of Hot nC-Atoms of Giant Resonance Reaction  
 Abstract    The hot uC-atom derived from (y, n)-nuclear reaction of the 40 MeV-Bremsstrahlung of a electron linear accelerator may react with valine irradiated. Besides retention-labelling of valine new products which are essentially carrierfree may be produced. By this means leucine has been separated using HPLC and identified by electrophoresis in amounts of 25 MBq labelled com­ pound. 
  Reference    Z. Naturforsch. 40c, 351—355 (1985); eingegangen am 29. November 1984 
  Published    1985 
  Keywords    zugeeignet Carrierfree Synthesis, Amino Acids, Valine, Leucine (y, n)-Nuclear Reaction 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0351.pdf 
 Identifier    ZNC-1985-40c-0351 
 Volume    40