Effects of the Simultaneous Presence of Geometrical and Velocity Broadening on the Pulsed Doppler Spectrum

1996 ◽  
pp. 413-418 ◽  
Author(s):  
G. Guidi ◽  
P. Tortoli ◽  
V. L. Newhouse
Keyword(s):  
Doppler Spectrum ◽  
Pulsed Doppler ◽  
Simultaneous Presence

Evaluating carotid artery disease. The concordance between pulsed Doppler/spectrum analysis and angiography

1983 ◽  
Vol 9 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Y. Langlois ◽  
G.O. Roederer ◽  
A. Chan ◽  
D.J. Phillips ◽  
K.W. Beach ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Spectrum Analysis ◽  
Carotid Artery Disease ◽  
Doppler Spectrum ◽  
Pulsed Doppler ◽  
Artery Disease

Experimental study of the effects of pulsed Doppler sample volume size and position on the Doppler spectrum

Ultrasonics ◽  
1991 ◽  
Vol 29 (5) ◽  
pp. 404-410 ◽  
Author(s):  
Y.F. Law ◽  
P.A.J. Bascom ◽  
K.W. Johnston ◽  
P. Vaitkus ◽  
R.S.C. Cobbold
Keyword(s):  
Experimental Study ◽  
Sample Volume ◽  
Doppler Spectrum ◽  
Pulsed Doppler ◽  
Volume Size

Kinetic Study of the Effect of Heparin on the Amidase Activity of Trypsin, Plasmin and Urokinase

1983 ◽  
Vol 49 (03) ◽  
pp. 199-203 ◽  
Author(s):  
V M Yomtova ◽  
N A Stambolieva ◽  
B M Blagoev
Keyword(s):  
Kinetic Study ◽  
Active Center ◽  
Simultaneous Presence ◽  
Amidase Activity ◽  
Competitive Inhibitors ◽  
Uncompetitive Inhibitor

SummaryIt was found that the effect of heparin on the amidase activity of urokinase (E C 3.4.21.31), plasmin (E C 3.4.21.7) and trypsin (E C 3.4.21.4) depended on the substrate used. No effect of heparin on the amidase activity of urokinase and trypsin was observed when Pyro Glu-Gly-Arg-p-nitroanilide (S-2444) and α-N-acetyl-L-lysine-p-nitroanilide (ALNA) were used as substrates. Heparin acted as a uncompetitive inhibitor of trypsin (Ki = 1.2×10-6 M), plasmin (Ki = 4.9×10-6 M) and urokinase (Ki = l.0×10-7 M) when Bz-Phe-Val-Arg-p-nitroanilide (S-2160), H-D-Val-Leu-Lys-p-nitroanilide (S-2251) and plasminogen, respectively, were used as substrates. These results, as well as the data obtained by studying the effect of the simultaneous presence of heparin and competitive inhibitors suggest that although heparin is not bound at the active center of these enzymes, it may influence the effectivity of catalysis.

Sign in / Sign up

Export Citation Format

Share Document