Phosphopyridoxal complexes with histamine and histidine (5) the kinetics of cyclic compound formation between histamine and pyridoxal-5′-phosphate in the presence of pig kidney diamine oxidase and rat intestinal histaminase

1977 ◽  
Vol 7 (1) ◽  
pp. 19-25 ◽  
Author(s):  
K. Saslak ◽  
D. Kierska ◽  
Cz. Maśliński
1988 ◽  
Vol 253 (1) ◽  
pp. 103-107 ◽  
Author(s):  
M A Shah ◽  
R Ali

Pig kidney diamine oxidase (DAO) was found to contain 5% (w/w) natural hexose, 3.25% glucosamine, 2.61% N-acetylglucosamine and 0.25% N-acetylneuraminic acid. The enzyme exhibited strong affinity towards concanavalin A (Con A) with a stoichiometry of 1:4.6. The kinetics of interaction approached an apparent first-order rate, with a rate constant (Kapp.) value of 1.5 × 10(-2) min-1. The enzyme reduced with dithiothreitol followed by alkylation with iodoacetamide showed an increase in the stoichiometry of the Con A-DAO interaction. Similarly arginine modification by phenylglyoxal caused decreased affinity, with an altered Kapp. value of 9.09 × 10(-3) min-1. The results suggest that, besides the carbohydrate content, the protein moiety of the enzyme also plays a significant role in the Con A-DAO interaction.


1988 ◽  
Vol 119 ◽  
Author(s):  
Hung-Yu Liu ◽  
Peng-Heng Chang ◽  
Jim Bohlman ◽  
Hun-Lian Tsai

AbstractThe interaction of Al and W in the Si/SiO2/W-Ti/Al thin film system is studied quantitatively by glancing angle x-ray diffraction. The formation of Al-W compounds due to annealing is monitored by the variation of the integrated intensity from a few x-ray diffraction peaks of the corresponding compounds. The annealing was conducted at 400°C, 450°C and 500°C from 1 hour to 300 hours. The kinetics of compound formation is determined using x-ray diffraction data and verified by TEM observations. We will also show the correlation of the compound formation to the change of the electrical properties of these films.


Author(s):  
Elisabeth Cheng ◽  
Henk L. Dekker ◽  
Bob F. van Gelder ◽  
Gerrit-Jan Koomen
Keyword(s):  

2022 ◽  
Vol 103 ◽  
pp. 103392
Author(s):  
Małgorzata Wronkowska ◽  
Danuta Rostek ◽  
Marzena Lenkiewicz ◽  
Edyta Kurantowicz ◽  
Teodora Georgieva Yaneva ◽  
...  

1976 ◽  
Vol 13 (1) ◽  
pp. 68-71 ◽  
Author(s):  
J. K. Howard ◽  
R. F. Lever ◽  
P. J. Smith ◽  
P. S. Ho

1977 ◽  
Vol 16 (7) ◽  
pp. 1153-1159 ◽  
Author(s):  
Yukio Takeno ◽  
Hiroyuki Miyata ◽  
Yoshiro Iwama

1971 ◽  
Vol 122 (4) ◽  
pp. 557-567 ◽  
Author(s):  
W. G. Bardsley ◽  
J. S. Ashford ◽  
C. M. Hill

1. The preparation of a series of compounds derived from diamines by replacing one amino group by a dimethylsulphonium, isothiuronium, trimethylammonium, NN′-dimethylimidazolium or N-methylpyridinium species is described. 2. The behaviour of these compounds as substrates of pig kidney diamine oxidase is reported. All but the trimethylammonium compounds proved to be substrates. 3. Many of these compounds showed potent inhibition at high substrate concentration and this was studied. 4. On the basis of these and other observations a scheme for enzyme–substrate interaction is suggested.


2004 ◽  
Vol 19 (2) ◽  
pp. 676-680 ◽  
Author(s):  
K.P. Liew ◽  
R.A. Bernstein ◽  
C.V. Thompson

Using continuous wafer-curvature measurements, stress generation was monitored as nickel thin films reacted with silicon substrates to form Ni2Si during isothermal anneals. A large compressive force developed during the reaction, but gradually relaxed after the reaction was complete. From a model for reactive film formation, a lower limit for the instantaneous stress associated with compound formation was found to be −2.00 ± 0.75 GPa. This instantaneous stress can be explained by a volumetric strain of 1.65 ± 0.62%, which is much smaller than the theoretical volume expansion of 62% in this system. These results suggest that significant inelastic deformation occurs during silicide formation. It was also found that diffusive creep relaxes the growth stress after the reaction. The observed instantaneous stress indicates that the energy of deformation associated with the reaction is of the same order as the energy that drives it, suggesting that stress generation and stress relaxation can play a significant role in the kinetics of reactive film formation.


Sign in / Sign up

Export Citation Format

Share Document