Design and characterization of 5-l autoclavable batch-culture bioreactor /

Ünsal Beyge, Şeyma
Bioreactors are systems that use a biological agent to perform a chemical reaction. Developments on the field of biotechnology made production of even previously known non-renewable petro-chemical products to be produced by microorganism by use of bioreactors possible. Also developments on tissue engineering made it possible to produce organs by using bioreactors. Therefore, bioreactors become integral parts of future economy and technology. In this study prototyping of a small scale bioreactor was performed. Heat transfer system which can cause temperature change of minimum 0.2 °C/seconds was produced. Also an agitation system that can operate up to 1500 rpm without any contamination risk was developed and produced. For effective foam/level control a miniature multi-probe foam/level sensor with 2 mm sensitivity and 50 mm working range was developed and tested.


Structural and thermal characterization of polymers via pyrolysis mass spectrometry
Argın, Emir; Hacaloğlu, Jale; Department of Chemistry (2005)
In the first part of this study, the structtural and thermal characterization of electrochemically and chemically polymerized poly(paraphenylene vinylene), (PPV), have been investigated by direct pyrolysis mass spectrometry. Thermal characteristics, and degradation products of electrochemically prepared poly(paraphenylene vinylene). Pyrolysis study indicated that thermal decomposition of PPV occurs at least two steps. The first being due to the loss of supporting electrolyte present and the second being dec...
Synthesis of conducting block copolymers and their use in the immobilization of invertase and polyphenol oxidase enzyme
Kıralp, Senem; Kıralp, Senem; Department of Chemistry (2004)
A new thiophene derivative containing menthyl group (MM) was synthesized and polymerized via chemical and electrochemical methods. Polymers obtained and MM itself were used to synthesize copolymers with pyrrole under conditions of constant potential electrolysis. Cyclic Voltammetry, thermal analysis and scanning electron microscopy analyses were performed for the characterization of samples. Immobilization of invertase and polyphenol oxidase enzymes was performed in the matrices obtained via copolymerizatio...
Characterization of poly(dihalophenylene oxides) in solution
Kısakürek, Duygu; Binboğa, Nevin; Harrod, John F. (Elsevier BV, 1987-9)
Several different dihalophenylene oxide polymers prepared by thermal decomposition of halophenoxo copper complexes were studied in toluene using light scattering. For polymers of molecular weight around 5 × 104, those obtained from 4-bromo-2,6-dichlorophenoxide, 2-chloro-4,6-dibromophenoxide and 2,4,6-tribromophenoxide appear to be relatively linear with higher values of , whereas those obtained from 2,4,6-trichlorophenoxide and 2-bromo-4,6-dichlorophenoxide appear to have branched or condensed structures w...
NUGAY, T; KUCUKYAVUZ, S (Wiley, 1992-01-01)
The reaction between 1,5-diethenylnaphthalene and sec-butyllithium produces a new difunctional organolithium initiator which is soluble in non-polar solvents and effective in the synthesis of styrene-isoprene-styrene triblock copolymer. Monomodal molecular weight distributions are observed for block copolymers and styrene homopolymers. The microstructure of polyisoprene blocks is similar to those polymers initiated by butyllithium in the same solvent.
Synthesis and Characterization of Polypyrrole Nanoparticles and Their Nanocomposites with Poly(propylene)
Sevil, Baytekin; Zuhal, Kucukyavuz (2009-07-09)
Conducting polypyrrole (PPy) nanoparticles were synthesized via microemulsion polymerization. PP/PPy nanocomposites were prepared by melt-mixing of polypyrrole with polypropylene (PP) and processed with injection molding. Tensile tests have revealed that increasing amount of PPy increased the strength and the stiffness of the nanocomposite while limiting the elongation of PP. Thermal gravimetric analysis has showed that incorporation of PPy nanoparticles has improved the thermal stability of the nanocomposi...
Citation Formats
Ş. Ünsal Beyge, “Design and characterization of 5-l autoclavable batch-culture bioreactor /,” M.S. - Master of Science, Middle East Technical University, 2014.