STABILITY AND STORAGE-CONDITIONS OF NADH-CYTOCHROME B5 REDUCTASE CROSS-LINKED INTO GELATIN BY CHROMIUM(III) ACETATE

Date

1994-06-01

Author

Yıldırım, Onur
Akbulut, Ural

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

135
views

0
downloads

NADH-cytochrome b5 reductase was isolated and partially purified from rabbit liver microsomes. It was immobilized into gelatin by chemical cross-linking. Chromium (III) acetate was used as cross-linker. The effects of pH and temperature on the immobilized cytochrome b5 reductase were investigated. The reusability and storage stability of immobilized enzyme were also tested. Immobilized NADH-cytochrome b5 reductase activities were found to be stable for at least 72 d and 24 uses. The storage stability of NADH-cytochrome b5 reductase was improved with immobilization at 25 degrees C.

Subject Keywords

Biophysics, Mechanics of Materials, Bioengineering, Biomaterials, Ceramics and Composites

URI

https://hdl.handle.net/11511/36660

Journal

BIOMATERIALS

DOI

https://doi.org/10.1016/0142-9612(94)90208-9

Collections

Department of Economics, Article

Suggestions

OpenMETU
Core

Characterization of sheep liver N-acetyltransferase Güray, Nülüfer Tülün (1997-05-01) Acetyl-coenzyme A (AcCoA)-dependent arylamine N-acetyltransferase (NAT:EC 2.3.1.5) was isolated from sheep liver and the specific activity was found as 5.3+/-1.4x10(-3) (mean+/-SE, n=8) nmoles/ min/ mg protein. The effects of p-aminobenzoic acid (PABA) and acetylCoA concentrations, pH, amount of enzyme and reaction period, on the enzyme activity were also studied and the optimum conditions for maximum activity of sheep liver NAT was determined. Sulfamethazine (SMZ) was used as a substrate in order to study ...
STUDIES ON IMMOBILIZATION OF UREASE IN GELATIN BY CROSS-LINKING SUNGUR, S; ELCIN, YM; Akbulut, Ural (Elsevier BV, 1992-01-01) Urease enzyme was immobilized in photographic gelatin by chemical cross-linking using formaldehyde, glutaraldehyde and chromium (III) acetate. The effects of enzyme and cross-linker concentrations, temperature, incubation time and pH on urea hydrolysis were investigated. Effect of reuse on the activity of immobilized enzyme was also studied. Glutaraldehyde (0.004 M) was the most suitable cross-linker; relative activities within 2.5 months after 24 reuses were stable (about 78%).
POLYESTER FILM STRIPS COATED WITH PHOTOGRAPHIC GELATIN CONTAINING IMMOBILIZED GLUCOSE-OXIDASE HARDENED BY CHROMIUM(III) SULFATE ELCIN, YM; Akbulut, Ural (Elsevier BV, 1992-01-01) Glucose oxidase was immobilized into photographic gelatin hardened by chromium(III) sulphate. The enzyme-gelatin mixture was coated on polyester film strips which allowed easy and simple handling during assays. The effect of gelatin and cross-linker concentrations on water content and enzymatic activity was studied. The effect of pH during immobilization and that of incubation temperature on maximum activity were examined- Enzyme leakage tests were carried out during reuse number studies. Consecutive use of...
IMMOBILIZATION OF ALPHA-AMYLASE INTO PHOTOGRAPHIC GELATIN BY CHEMICAL CROSS-LINKING BAYRAMOGLU, Z; Akbulut, Ural; SUNGUR, S (Elsevier BV, 1992-01-01) Alpha-amylase was immobilized into photographic gelatin by chemical cross-linking with chromium (III) acetate and chromium (III) sulphate. Cellulose triacetate film strips, enabled simple handling when coated with an alpha-amylase-gelatin mixture, accomplishing a high degree of durability during consecutive immersions into reaction media. The optimum conditions for pH, substrate concentration, temperature, incubation time and storing conditions of free and immobilized alpha-amylase were determined. The effe...
Sustained release of a model macromolecule from preparations with erodible core Hasırcı, Vasıf Nejat; Kamel , Ibrahim (Elsevier BV, 1988-9) A series of sustained release tablets were prepared which consisted of a water-soluble core and a highly hydrophobie coat. Release of a macromolecule. Spectrum Orange, from this preparation was studied. It was found that release was controlled by the coat composition and coating solution viscosity. SEM and optical microscopy of the tablets indicated that the coats contained pores on the surface which penetrated in towards the centre of the core. It was deduced that the almost zero order release of macromole...

Citation Formats

O. Yıldırım and U. Akbulut, “STABILITY AND STORAGE-CONDITIONS OF NADH-CYTOCHROME B5 REDUCTASE CROSS-LINKED INTO GELATIN BY CHROMIUM(III) ACETATE,” BIOMATERIALS, pp. 587–592, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36660.