Entrapment of invertase in an interpenetrated polymer network of alginic acid and poly (1-vinylimidazole)

Kartal, Muejgan
Kayahan, Senem
Bozkurt, Ayhan
Toppare, Levent Kamil
In this work, we have investigated the synthesis and characterization of a proton conductor based on alginic acid and poly (1-vinylimidazole). The polymer network was obtained by mixing alginic acid and poly (1-vinylimidazole) at various stoichiometric ratios. The polymer electrolytes were characterized by elemental analysis and FT-IR spectroscopy. Invertase was entrapped in the polymer networks during complex formation. Additionally, the maximum reaction rate and Michaelis-Menten constant were investigated for the immobilized invertase. The temperature and pH optimization, operational stability and shelf life of the polymer network were examined.


Atom transfer rearrangement radical polymerization of diammine-bis(2,4,6-trihalophenolato)copper(II) complexes in the solid state
Goekagac, Guelsuen; Sonsuz, Muammer; Sen, Fatih; Kisakuerek, Duygu (Walter de Gruyter GmbH, 2006-10-01)
The synthesis of the poly(dichloro- or dibromophenylene oxide)s was achieved by the thermal decomposition of diammine-bis(2,4,6-trihalophenolato)copper(II) complexes in the solid state by atom transfer rearrangement radical polymerization. The thermal decomposition was performed either at different temperature ranges, 110-250 degrees C, for 3 h, or at the maximum conversion temperature for different time intervals, 3-48 h. Maximum yields of polymers were obtained at 190 degrees C and 3 h. The polymers were ...
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We designed and synthesized novel boradiazaindacene (Bodipy) derivatives that are appropriately functionalized for metal-ion-mediated supramolecular polymerization. Thus, ligands for 2-terpyridyl-, 2,6-terpyridyl-. and bipyridyl-functionalized Bodipy dyes were synthesized through Sonogashira couplings. These fluorescent building blocks are responsive to metal ions in a stoichiometry-dependent manner. Octahedral coordinating metal ions such as Zn-II result in polymerization at a stoichiometry corresponding t...
Molecular insights for how preferred oxoanions bind to and stabilize transition-metal nanoclusters: a tridentate, C-3 symmetry, lattice size-matching binding model
Finke, RG; Özkar, Saim (Elsevier BV, 2004-01-01)
The recent discovery of an anion efficacy series for the formation and stabilization of transition-metal Ir(0)(n) nanoclusters, specifically P2W15Nb3O629- similar to SiW9Nb3O407- > C6H5O73- > [-CH2CH(CO2-)-](n)(n-) similar to OAc- similar to P3O93- similar to Cl- similar to OH--that is, polyoxoanions > citrate(3-) > other commonly employed nanocluster stabilizing anions, raises the question of what are the underlying factors behind this preferred order of stabilizers? A brief discussion of three relevant na...
Vlasenko, N. V.; Kochkin, Yu. N.; Strizhak, P. E.; Doğu, Timur; DOĞU, GÜLŞEN; OKTAR, NURAY; Degirmenci, L. (Springer Science and Business Media LLC, 2010-11-01)
The catalytic characteristics of massive and loaded sulfonic resins in the synthesis of ethyl tert-butyl ether at atmospheric and increased pressures have been compared. It has been established that massive sulfonic resins are more active than loaded resins at atmospheric pressure. At higher pressures, on the other hand, the activity and selectivity of catalysts are greater the lower the content of polymer as a result of the increased effectiveness of the acid centers.
Phase transition of chemically synthesized FePt nanoparticles under high pressure
ŞİMŞEK, TELEM; Karci, Ozgur; ÖZCAN, ŞADAN (The Scientific and Technological Research Council of Turkey, 2018-01-01)
We present the results of a study related to phase transformation of chemically synthesized FePt nanoparticles under high pressure from face-centered cubic into face-centered tetragonal structure. As-synthesized nanoparticles are around 4.5 nm and show superparamagnetic behavior at 300 K. After annealing under 60 bar pressure of hydrogen at 400 degrees C for 2 h, nanoparticles exhibit strong ferromagnetic behavior with 5391 Oe coercivity. Results show that high-pressure annealing lowers the decomposition te...
Citation Formats
M. Kartal, S. Kayahan, A. Bozkurt, and L. K. Toppare, “Entrapment of invertase in an interpenetrated polymer network of alginic acid and poly (1-vinylimidazole),” TALANTA, pp. 659–662, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47630.