Elliptic, Hyperbolic and Mixed Complex Equations with Parabolic Degeneracy

10.1142/6675 ◽  
2007 ◽  
Author(s):  
Guo Chun Wen
Keyword(s):  
Mixed Complex ◽  
Parabolic Degeneracy

Reaction of metallic nitrilotriacetates with histamine

1969 ◽  
Vol 47 (8) ◽  
pp. 1269-1273 ◽  
Author(s):  
A. L. Beauchamp ◽  
J. Israeli ◽  
H. Saulnier
Keyword(s):  
Potentiometric Titration ◽  
Formation Constants ◽  
Amino Group ◽  
Mixed Complex ◽  
Ph Values ◽  
Titration Curves ◽  
Terminal Amino ◽  
Complex Ion

Cu(II), Ni(II), Co(II), and Zn(II) nitrilotriacetates (MeX−) react with histamine nitrate (LH+) to form a protonated mixed complex MeXLH where the metal appears to be bound only to the tertiary imidazolic nitrogen of histaminium ion. At higher pH values the proton dissociates to yield a mixed complex ion MeXL− in which both the imidazolic nitrogen and the terminal amino group are coordinated. The formation constants of these species were calculated from the potentiometric titration curves.

First Eu(II)/Ln(III) Mixed Complex with High Oxidative Stability

2015 ◽  
Vol 15 (11) ◽  
pp. 5288-5292 ◽  
Author(s):  
Yongqin Wei ◽  
Gaoji Wang ◽  
Kechen Wu
Keyword(s):  
Oxidative Stability ◽  
Mixed Complex

Molecular design to mimic the copper(II) transport site of human albumin: studies of equilibria between copper(II) and glycylglycyl-L-histidine-N-methyl amide and comparison with human albumin

1976 ◽  
Vol 54 (8) ◽  
pp. 1300-1308 ◽  
Author(s):  
Theo P. A. Kruck ◽  
Show-Jy Lau ◽  
Bibudhendra Sarkar
Keyword(s):  
Ternary System ◽  
Equilibrium Dialysis ◽  
Human Albumin ◽  
Binary Complex ◽  
Mixed Complex ◽  
Free Peptide ◽  
System L ◽  
Peptide Derivative ◽  
Carboxyl Terminal ◽  
Transport Site

In continuing the investigation of designing the specific Cu(II)-transport site of human serum albumin, the peptide derivative glycylglycyl-L-histidine-N-methyl amide was designed to approximate more closely to the native protein. This peptide derivative was synthesized in good yield. The equilibria involved in the binary system, Cu(II)–glycylglycyl-L-histidine-N-methyl amide, have been studied, as well as those in the ternary system, L-histidine–Cu(II)–glycylglycyl-L-histidine-N-methyl amide. This peptide derivative was found to bind Cu(II) exclusively as a 1:1 complex in the pH range 4 to 11, having the same ligand atoms as those for the carboxyl-terminal free peptide and human albumin. However, it was found that glycylglycyl-L-histidine-N-methyl amide bound Cu(II) more strongly than did glycylglycyl-L-histidine, the stability constants being log β1–21 = −0.479 and −1.99 respectively. In the ternary system, only 10% of the mixed complex was detected at pH 7, in comparison to 80% found in the case of the carboxyl-terminal free peptide. This finding agrees well with the increased stability of this peptide binary complex. These observations are also consistent with the results obtained from the equilibrium dialysis experiments. The Cu(II) – peptide amide complex has a dissociation constant of 2.07 × 10−17, indicating a higher binding strength of this peptide derivative for Cu(II) over the native albumin by a factor of 3.

scholarly journals Materials of the early Neolithic of the Yarlukovskaya Protoka site (point 222) on the Upper Don

2019 ◽  
Vol 8 (2) ◽  
pp. 220-229
Author(s):  
Roman Viktorovich Smolyaninov ◽  
Aleksey Aleksandrovich Kulichkov ◽  
Elizaveta Sergeevna Yurkina
Keyword(s):  
Silty Clay ◽  
Mixed Complex ◽  
Cultural Layer ◽  
Early Neolithic ◽  
Stone Artifacts ◽  
Left Tributary ◽  
Clay Ceramics ◽  
Almost All ◽  
Neolithic Cultures

This paper analyzes materials located in the floodplain of the Matyra River (left tributary of the Voronezh River) of the Yarlukovskaya Protoka (point 222) in the Gryazinsky District of the Lipetsk Region. It was investigated in 1963, 1964, 1967 and 1968 by Vsevolod Levenok. The materials of three early Neolithic cultures of VI Millennium BC were revealed here. The materials of the Yelshanskaya culture are represented by corollas and bottoms of 12 vessels. Almost all dishes, except one bottom and several walls, have no ornament, with the exception of one or two rows of conical pit. All ceramics are well smoothed. Ceramics were made from silty clay. The location of materials in the cultural layer confirms the earlier occurrence of the Yelshanskaya culture ceramics. The ceramics of the Karamyshevo culture is represented by fragments from three vessels. The dishes are predominantly decorated with small oval pricks composed in horizontal and vertical rows. Ceramics were made from silty clay. Ceramics of the Srednedonskaya culture are represented by corollas and rounded bottoms of 15 vessels. It is decorated with triangular prick or small comb prints. Ceramics were made from silty clay. At Yarlukovskaya Protoka site 304 stone artifacts were discovered, mainly of flint. This industry could be described as flake-blade technique. The monument is a mixed complex - stratigraphic and planigraphic readable observations of stone inventory location could not be done.

ChemInform Abstract: STERIC EFFECTS IN PYRROLE-BASED MIXED COMPLEX SYSTEMS

1976 ◽  
Vol 7 (32) ◽  
pp. no-no
Author(s):  
B. S. RAGHAVENDRA ◽  
S. GUPTA ◽  
R. H. BALUNDGI ◽  
A. CHAKRAVORTY
Keyword(s):  
Complex Systems ◽  
Steric Effects ◽  
Mixed Complex

Nonlocal and Initial Problems for Quasilinear, Nonstrictly Hyperbolic Equations with General Solutions Represented by Superposition of Arbitrary Functions

2003 ◽  
Vol 10 (4) ◽  
pp. 687-707
Author(s):  
J. Gvazava
Keyword(s):  
Cauchy Problem ◽  
General Solution ◽  
Hyperbolic Equations ◽  
Sufficient Conditions ◽  
Second Order ◽  
Quasilinear Equations ◽  
General Solutions ◽  
Parabolic Degeneracy

Abstract We have selected a class of hyperbolic quasilinear equations of second order, admitting parabolic degeneracy by the following criterion: they have a general solution represented by superposition of two arbitrary functions. For equations of this class we consider the initial Cauchy problem and nonlocal characteristic problems for which sufficient conditions are established for the solution solvability and uniquness; the domains of solution definition are described.

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