Yazar "Pekcan, Önder" için PubMed İndeksli Yayınlar Koleksiyonu listeleme
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Cation Effect on Slow Release from Alginate Beads: A Fluorescence Study
Kaygusuz, Hakan; Erim, F. Bedia; Pekcan, Önder; Evingür, Gülşen Akin (Springer/Plenum Publishers, 2014)In this study spherical alginate beads containing pyranine (P-y) as a fluorescence probe were prepared by ionotropic gelation of a sodium alginate solution. The steady state fluorescence technique was used to study pyranine ... -
Drying of Polyacrylamide Composite Gels Formed with Various Kappa- Carrageenan Content
Evingür, Gülşen Akın; Pekcan, Önder (Springer/Plenum Publishers, 2011)Drying of polyacrylamide (PAAm)-kappa-carrageenan (kappa C) composite gels were monitored by using steady-state fluorescence technique. Disc shaped gels were formed from acrylamide (AAm) and N N'- methylenebisacrylamide(Bis) ... -
Electrical and optical percolations of polystyrene latex-multiwalled carbon nanotube composites
Kara, Selim; Arda, Ertan; Dolastir, Fahrettin; Pekcan, Önder (Academic Press Inc Elsevier Science, 2010)Electrical conductivity and optical transmittance properties of polystyrene (PS)-multiwalled carbon nanotube (MWCNT) composite films were investigated. Composite films were prepared by mixing of various mass fractions of ... -
Group behaviour in physical chemical and biological systems
Saçlıoğlu, Cihan; Pekcan, Önder; Nanjundiah, Vidyanand (Indıan Acad Scıences, 2014)Groups exhibit properties that either are not perceived to exist or perhaps cannot exist at the individual level. Such 'emergent' properties depend on how individuals interact both among themselves and with their surroundings. ... -
Kinetic models for the dynamical behavior of polyacrylamide (PAAm)-kappa-carrageenan (kappa C) composite gels
Evingür, Gülşen Akın; Pekcan, Önder (Springer, 2015)A fluorescence method was employed for studying the drying and swelling of PAAm-kappa C composite gels which were formed from acrylamide (AAm) and N N'- methylenebisacrylamide (BIS) with various kappa-carrageenan (kappa ... -
The modifier effects of chymotrypsin and trypsin enzymes on fluorescence lifetime distribution of "N-(1-pyrenyl)maleimide-bovine serum albumin" complex
Özyiğit, İbrahim Ethem; Karakuş, Emine; Pekcan, Önder (Pergamon-Elsevier Science LTD, 2016)Chymotrypsin and trypsin are the well known proteolytic enzymes, both of which are synthesized in the pancreas as their precursors the inactive forms; chymotrypsinogen and trypsinogen and then are released into the duodenum ... -
Oxygen Diffusion into Multiwalled Carbon Nanotube Doped Polystrene Latex Films Using Fluorescence Technique
Yargı, Önder; Ugur, Saziye; Pekcan, Önder (Springer/Plenum Publishers, 2013)This study examines the oxygen diffusion into polystyrene (PS) latex/multiwalled carbon nanotube (MWNT) nanocomposite films (PS/MWNT) consisting of various amounts of MWNT via steady state fluorescence technique (SSF). ... -
The Role of Pyranine in Characterization of PAAm-kappa C Composites by Using Fluorescence Technique
Evingür, Gülşen Akın; Pekcan, Önder (Springer/Plenum Publishers, 2011)Polyacrylamide (PAAm) doped by kappa-carrageenan (kappa C) gels were prepared with various amounts of kappa C varying in the range between 0 wt.% and 3 wt.%. Steady-state fluorescence (SSF) technique was employed for ... -
Sorption and Desorption of PVA-Pyrene Chains in and out of Agarose Gel
Kara, Selim; Gacal, Burçin; Tunç, Deniz; Yağcı, Yusuf; Pekcan, Önder (Springer/Plenum Publishers, 2012)In situ steady-state fluorescence (SSF) measurement technique was applied to investigation of pyrene labeled Poly(vinyl alcohol) (PVA-Py) molecules diffusion in and out of agarose gels. Gel samples with four different ... -
Structural Analysis of Peptide Fragments Following The Hydrolysis of Bovine Serum Albumin by Trypsin and Chymotrypsin
Özyiğit, İbrahim Ethem; Akten, Ebru Demet; Pekcan, Önder (Taylor & Francis Inc, 2016)Peptide bond hydrolysis of bovine serum albumin (BSA) by chymotrypsin and trypsin was investigated by employing time-resolved fluorescence spectroscopy. As a fluorescent cross-linking reagent N-(1-pyrenyl) maleimide (PM) ... -
Surfactant and Metal Ion Effects on the Mechanical Properties of Alginate Hydrogels
Kaygusuz, Hakan; Evingür, Gülşen Akin; Pekcan, Önder; von Klitzing, Regine; Erim, F. Bedia (Elsevier Science Bv, 2016)This paper addresses the controlled variation of the mechanical properties of alginate gel beads by changing the alginate concentration or by adding different surfactants or cross-linking cations. Alginate beads containing ... -
Thermal Phase Transitions of Agarose in Various Compositions: A Fluorescence Study
Kara, Selim; Arda, Ertan; Dolastir, Fahrettin; Pekcan, Önder (Springer/Plenum Publishers, 2011)The effect of agarose content on thermal phase transitions of the agarose gels was investigated by using Steady State Fluorescence (SSF) method. Scattered light I(sc) and fluorescence intensity I(fl) were monitored against ...