A COMPARATIVE-STUDY OF THE PERFORMANCE OF SOLID SUPPORTED AND SOLUBLE UREASE FOR THE ENZYMATIC-HYDROLYSIS OF UREA

1992-01-01
DEMIREL, G
AKOVALI, G
TANYOLAC, A
Hasırcı, Nesrin
The performance of both free and solid supported urease for the enzymatic hydrolysis of urea was studied. Kinetic analysis of reaction rate data shows that the kinetic data were consistent with the proposed model. Statistical tests validated the model. Despite the deactivation of ureases, the immobilized enzyme could be the choice for a technological process aiming at the detoxification of blood in haemoperfusion columns.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

Suggestions

A theoretical study of the cycloaddition between cyclopentadiene and allylideneammonium cation: An AM1 study
Zora, Metin (2002-12-09)
The Diels-Alder reaction between cyclopentadiene and allylideneammonium cation has been studied by means of AMI semiempirical method. Allylideneammonium cation can add to cyclopentadiene via its either C=C or C=N bond. For each cycloaddition, four reactive channels have been characterized corresponding to the endo-s-trans, endo-s-cis, exo-s-trans and exo-s-cis approach modes. The results indicate that C=C bond of allylideneammonium cation is more reactive as dienophile than its C=N bond in reaction with cyc...
A THERMODYNAMIC STUDY OF THE SYSTEM MGCL2-NACL-CACL2
Karakaya, İshak (1986-10-01)
The reversible EMF for the formation of MgCl2 in fused salts containing NaCl and CaCl2 was studied with a view to furthering the understanding of electrolytes of use in industrial magnesium electrolysis. Measurements were carried out in a cell with pure chlorine gas and Mg-Bi alloy as active electrode materials. The data were used to infer the Gibbs energy of mixing, the enthalpy of mixing and the entropy of mixing. These properties were used with other data to construct the liquidus surface of the ternary ...
A theoretical study on coenzyme Q(10) and its reduced form. AM1 treatment
Türker, Burhan Lemi (2000-01-01)
Coenzyme Q(10) (CoQ(10)) and its reduced form, ubiquinol (CoQ(10)H(2)) were subjected to semiempirical quantum chemical treatment at the level of AM1-RHF type calculations. Both of the structures are stable having negative total and binding energies and exothermic heats of formation. The frontier molecular orbital characteristics, electrostatic contour diagrams and charge distributions of these structures were presented.
A novel urea conductometric biosensor based on zeolite immobilized urease
Kirdeciler, Salih Kaan; Soy, Esin; Öztürk, Seçkin; Kucherenko, Ivan; Soldatkin, Oleksandr; Dzyadevych, Sergei; Akata Kurç, Burcu (2011-09-15)
A new approach was developed for urea determination where a thin film of silicalite and zeolite Beta deposited onto gold electrodes of a conductometric biosensor was used to immobilize the enzyme. Biosensor responses, operational and storage stabilities were compared with results obtained from the standard membrane methods for the same measurements. For this purpose, different surface modification techniques, which are simply named as Zeolite Membrane Transducers (ZMTs) and Zeolite Coated Transducers (ZCTs)...
A comparative study of electrocoagulation and coagulation of aqueous suspensions of kaolinite powders
Kilic, Mehtap Guelsuen; Hoşten, Çetin (2010-04-15)
Removal of kaolinite particles from their synthetically prepared suspensions was studied by electrocoagulation and coagulation to investigate the effect of such operating parameters as initial pH, coagulant dosage, applied voltage, current density, and time. Coagulation was more effective in a wider pH range (pH 5-8) than electrocoagulation which yielded optimum effectiveness in a relatively narrower pH range around 9, where, in both methods, these pH values corresponded to near-zero zeta potentials of kaol...
Citation Formats
G. DEMIREL, G. AKOVALI, A. TANYOLAC, and N. Hasırcı, “A COMPARATIVE-STUDY OF THE PERFORMANCE OF SOLID SUPPORTED AND SOLUBLE UREASE FOR THE ENZYMATIC-HYDROLYSIS OF UREA,” JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, pp. 319–323, 1992, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30452.