scholarly journals Sorption of Richlokain on Polycarboxylic Acid Gels

2016 ◽  
Vol 5 (4) ◽  
pp. 311
Author(s):  
Marat K. Beysebekov ◽  
Assel K. Toktabaeva ◽  
Zharylkasyn A. Abilov
Keyword(s):  
Ir Spectroscopy ◽  
Complex Formation ◽  
Sorption Process ◽  
Reagent Concentration ◽  
Polycarboxylic Acid ◽  
Polymethacrylic Acid ◽  
Cross Link ◽  
Ionic Force ◽  
Equilibrium Swelling ◽  
Hydrophobic Nature

The sorption immobilization of richlokain on gels of polyacrylic acid (PAAG) or polymethacrylic acid (PMAAG) has been studied. By a number of methods – equilibrium swelling, potentiometry, IR-spectroscopy, and sorption it has been shown that binding of richlokain with these gels leads to the complex formation owing to the electrostatic interaction, which is stabilised by the hydrophobic and hydrogen bonds. Effect of an ionic force, reagent concentration, cross-link degree, hydrophobic nature of gels, and pH of solutions on the sorption process has been studied.

Complex formation between zinc(II) and arginine in a large range of reagent concentration

2014 ◽  
Vol 145 (11) ◽  
pp. 1707-1714 ◽  
Author(s):  
Emilio Bottari ◽  
Maria Rosa Festa ◽  
Lorella Gentile
Keyword(s):  
Complex Formation ◽  
Large Range ◽  
Reagent Concentration

Study of intermolecular interactions and complex formation of aminofurazans by IR spectroscopy

1994 ◽  
Vol 43 (12) ◽  
pp. 2122-2125 ◽  
Author(s):  
N. O. Cherskaya ◽  
O. V. Kharitonova ◽  
V. A. Shlyapochnikov ◽  
T. S. Novikova ◽  
L. I. Khmel'nitskii
Keyword(s):  
Ir Spectroscopy ◽  
Complex Formation ◽  
Intermolecular Interactions

Effect of synthesis parameters on polymethacrylic acid xerogel structures and equilibrium swelling

2009 ◽  
Vol 83 (9) ◽  
pp. 1558-1562
Author(s):  
V. Panić ◽  
J. Jovanović ◽  
B. Adnadjević ◽  
S. Velicković
Keyword(s):  
Polymethacrylic Acid ◽  
Synthesis Parameters ◽  
Equilibrium Swelling

scholarly journals Modifications of the acyl-d-alanyl-d-alanine terminus affecting complex-formation with vancomycin

1971 ◽  
Vol 123 (5) ◽  
pp. 789-803 ◽  
Author(s):  
M. Nieto ◽  
H. R. Perkins
Keyword(s):  
Complex Formation ◽  
Cell Walls ◽  
Solid Phase ◽  
Side Chain ◽  
Stable Complex ◽  
Cross Link ◽  
Methyl Group ◽  
The Third ◽  
Carboxyl Terminal ◽  
Better Than

Vancomycin forms complexes with peptides terminating in d-alanyl-d-alanine that are analogous to the biosynthetic precursors of bacterial mucopeptides. The specificity of complex-formation has been studied by means of many synthetic peptides, prepared by both solid-phase and conventional methods. The following conclusions can be drawn: (a) three amide linkages are required to form a stable complex; (b) the terminal carboxyl group must be free; (c) the carboxyl terminal and subterminal residues must be either glycine or of the d-configuration; (d) the size of the side chain in these residues greatly influences the affinity for vancomycin, a methyl group being the optimum in each case; (e) the nature of the side chain in the third and fourth residues has a smaller effect on complex-formation, but an l-configuration was somewhat better than a d-configuration in the third position. In addition to acyl-d-alanyl-d-alanine, other peptides that occur in bacterial cell walls will combine with vancomycin, although less strongly, e.g. acyl-d-alanyl-d-α-amino acid (where the terminal d-residue may form the cross-link in mucopeptide structure) and acyl-l-alanyl-d-glutamylglycine (a sequence found in the mucopeptide of Micrococcus lysodeikticus and related organisms). These results throw some light on the specificity of the uptake of vancomycin by living bacteria.

Preparation and Characteristics of Chitin-Gelatin Composite Film

2013 ◽  
Vol 690-693 ◽  
pp. 1243-1246
Author(s):  
Ya Juan Wang ◽  
Lan Jiang ◽  
Shuang Xi Shao
Keyword(s):  
Composite Film ◽  
Carbonyl Group ◽  
Gelatin Film ◽  
Hydroxyl Group ◽  
Cross Link ◽  
Denaturation Temperature ◽  
Equilibrium Swelling ◽  
Swelling Rate ◽  
Equilibrium Swelling Ratio ◽  
The Stability

Using hydrogen peroxide as oxidant, the chitin has been oxidized under a certain conditions. And then the IR and SEM of product has been tested, and the results show that hydroxyl group can be transform carbonyl group. What’s more, the oxidation reaction occurred not only in the surface of chitin, but also in its interior. Owing to the reaction of carbonyl group in the oxidation product, this chitin derivatives was applied to cross link with gelatin material, and the properties of modified gelatin film then has been tested. The results of Differential Scanning Calorimeter (DSC) show that the denaturation temperature of composite gelatin film has been enhanced to 109.8°C, and its swelling rate also has been slow, which ensure the stability as a kind of biomaterials, such as microcapsule and microspheres. And the time of native gelatin film achieving equilibrium swelling state is 9 minutes, and the time is 14 minutes for composite film, which means the oxidized chitin can delay the complete swelling rate. And the equilibrium swelling ratio of native gelatin film is larger than that of composite film. Therefore, the composite film will have a good prospects as a kind of potential biomedical.

Complex Formation of Europium(III) with Photoditazine According to Luminescence and IR Spectroscopy

2020 ◽  
Vol 65 (3) ◽  
pp. 329-334
Author(s):  
N. I. Steblevskaya ◽  
M. A. Medkov ◽  
M. V. Belobeletskaya
Keyword(s):  
Ir Spectroscopy ◽  
Complex Formation
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