Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4822
Title: Humidity adsorption kinetics of a trypsin gel film
Authors: Okur, Salih
Ceylan, Çağatay
Çulcular, Evren
Okur, Salih
Ceylan, Çağatay
Çulcular, Evren
Keywords: Atomic force microscopy
Gelation
Humidity
Quartz crystal microbalance
Thin films
Trypsin
Issue Date: Feb-2012
Publisher: Elsevier Ltd.
Source: Okur, S., Ceylan, Ç., and Çulcular, E. (2012). Humidity adsorption kinetics of a trypsin gel film. Journal of Colloid and Interface Science, 368(1), 470-473. doi:10.1016/j.jcis.2011.09.078
Abstract: This study focuses on the humidity adsorption kinetics of an isopropanol-induced and pH-triggered bovine pancreatic trypsin gel (BPTG). The BPTG was adsorbed on a gold coated Quartz Crystal Microbalance (QCM) substrate with a thickness of 376nm. The morphology of the film was characterized using Atomic Force Microscopy (AFM). QCM was used to investigate the humidity sensing properties of the BPTG film. The response of the humidity sensor was explained using the Langmuir model. The average values of adsorption and desorption rates between 11% RH (relative humidity) and 97% RH were calculated as 2482.5M -1s -1 and 0.02s -1, respectively. The equilibrium constant and average Gibbs Free Energy of humidity adsorption and desorption cycles were obtained as 133,000 and -11.8kJ/mol, respectively. © 2011 Elsevier Inc..
URI: http://doi.org/10.1016/j.jcis.2011.09.078
http://hdl.handle.net/11147/4822
ISSN: 0021-9797
Appears in Collections:Food Engineering / Gıda Mühendisliği
Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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