Modification of food contacting surfaces by plasma polymerization technique. Part II: Static and dynamic adsorption behavior of a model protein “bovine serum albumin” on stainless steel surface

Mutlu, Selma; Çökeliler, Dilek; Mutlu, Mehmet

doi:10.1016/j.jfoodeng.2005.10.028

Cited by 13 publications

(9 citation statements)

References 13 publications

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“…For example, G-CSF (332), a hydrophobic cytokine (174), and IL-2 (333) have been shown to adsorb to glass. The binding of IgG1 to plastic has been reported (334), and BSA, like other proteins, exhibits some propensity to bind to stainless steel (335). Consequently, many biophysical studies have been published on protein adsorption, especially as it applies to processing and protein instability (336)(337)(338)(339)(340).…”

Section: Surface Adsorptionmentioning

confidence: 99%

Stability of Protein Pharmaceuticals: An Update

Manning¹,

Chou²,

Murphy³

et al. 2010

Pharm Res

999

782

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In 1989, Manning, Patel, and Borchardt wrote a review of protein stability (Manning et al., Pharm. Res. 6:903-918, 1989), which has been widely referenced ever since. At the time, recombinant protein therapy was still in its infancy. This review summarizes the advances that have been made since then regarding protein stabilization and formulation. In addition to a discussion of the current understanding of chemical and physical instability, sections are included on stabilization in aqueous solution and the dried state, the use of chemical modification and mutagenesis to improve stability, and the interrelationship between chemical and physical instability.

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Section: Surface Adsorptionmentioning

confidence: 99%

Stability of Protein Pharmaceuticals: An Update

Manning¹,

Chou²,

Murphy³

et al. 2010

Pharm Res

999

782

View full text Add to dashboard Cite

show abstract

“…Thus, lower adsorption capacities are obtained. In our previous study (Mutlu et al 2007), the 1/n value for the bare stainless steel surface was reduced from 0.88 to 0.83 after treating the surface by HEMA monomer in the PlzP system. The Freundlich model yielded the best fit with the highest R 2 value of 0.995; thus, the Freundlich isotherm was the most suitable equation adsorption equilibrium to describe the attachment of biofilm forming bacteria on stainless steel.…”

Section: Calculation Of Langmuir and Freundlich Constantsmentioning

confidence: 92%

“…In lower adsorption capacity of a surface, the heterogeneity of the adsorbing molecules normally increases, and the Freundlich constant, 1/n, gets closer to zero. In this study, the 1/n value for the bare stainless steel surface was reduced from 0.58 to 0.39 after treating the surface by EDA monomer in PlzP system (Mutlu et al 2007). As the value of b decreases, the affinity between the retaining material and retained material increases.…”

Section: Calculation Of Langmuir and Freundlich Constantsmentioning

confidence: 97%

Modification of Food-Contacting Surfaces by Plasma Polymerization Technique: Reducing the Biofouling of Microorganisms on Stainless Steel Surface

Şen

Bağcı

Güleç

et al. 2009

Food Bioprocess Technol

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In this study, the prevention of the attachment of test microorganism Enterobacter sakazakii onto stainless steel (SS 316) surfaces by radio frequency (RF) plasma polymerization (PlzP) technique using several hydrophilic monomers as precursors was reported. Different plasma conditions (RF discharge power of 20-80 W with exposure time of 10 min) were employed during the modifications. PlzP-modified surfaces were characterized in detail by static contact angle measurements in order to state the change of surface hydrophilicity. The surface topology of unmodified and PlzP [ethylenediamine (EDA)]-modified SS 316 plates was characterized by atomic force microscopy. The attachment of the model microorganism on the SS 316 surface modified by plasma using EDA at 45 W and 10 min was reduced by 99.74% in comparison to the unmodified control surface. For equilibrium adsorption behavior, Freundlich and Langmuir models were attempted and model parameters for Freundlich (K F and 1/n) and for Langmuir (a and b) were obtained. The values of the K F and 1/n were 5.6 and 0.58 and 0.9 and 0.39, respectively; the values of a and b were 25×10 4 and 1.82×10 −8 and 0.3×10 4 and 7.96×10 -8 , for bare and PlzP-EDA-modified SS 316 surfaces, respectively. As a result, PlzP technique was found to be an alternative simple method to decrease the microbial attachment and create bacterial anti-fouling surfaces.

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“…RF-plasma system (PICO, Diener Electronics, Germany) was used for modification processes (Mutlu et al 1997;Cokeliler and Mutlu 2002;Mutlu et al 2007). Graphite leads were modified by employing VP monomer as precursor at various plasma polymerization parameters, such as discharge power (5, 10, 15, and 30 W) and exposure time (5, 15, 30, and 60 min).…”

Section: Plasma Equipment and Treatmentmentioning

confidence: 99%

A New Approach for the Electrochemical Detection of Phenolic Compounds. Part I: Modification of Graphite Surface by Plasma Polymerization Technique and Characterization by Raman Spectroscopy

Günaydın

Şir

Kavlak

et al. 2009

Food Bioprocess Technol

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This paper describes the early stages of preparation of an electrochemical sensor for the detection of phenolic compounds. For this aim, graphite leads were modified by plasma polymerization (PlzP) technique utilizing the monomer N-vinylpyrrolidone (VP) with its conductive property as precursor. The influence of different experimental parameters such as plasma discharge power and exposure time was investigated to optimize the proposed electrode. After the modification process, graphite leads (electrodes) were investigated by differential pulse voltammetry. The voltammograms were recorded between 0 and +1.0 V at 16 mVs −1 . The surface characteristics of the PlzP-VP modified carbon lead surfaces were determined by Raman spectroscopy. It was clearly observed that VP monomer was polymerized to form polyvinylpyrrolidone that is a very well-known adsorbant for phenolics. As expected, it was clearly pointed out that the electrochemical conductivity of the modified carbon leads were varied due to adsorption of a model phenolic compound "gallic acid" at a certain concentration.

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Modification of food contacting surfaces by plasma polymerization technique. Part II: Static and dynamic adsorption behavior of a model protein “bovine serum albumin” on stainless steel surface

Cited by 13 publications

References 13 publications

Stability of Protein Pharmaceuticals: An Update

Stability of Protein Pharmaceuticals: An Update

Modification of Food-Contacting Surfaces by Plasma Polymerization Technique: Reducing the Biofouling of Microorganisms on Stainless Steel Surface

A New Approach for the Electrochemical Detection of Phenolic Compounds. Part I: Modification of Graphite Surface by Plasma Polymerization Technique and Characterization by Raman Spectroscopy

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