Dissertation > Excellent graduate degree dissertation topics show

Functionalization of Multiwalled Carbon Nanotubes for Highly Selective Isolation of Albumin

Author: ChenMeiLing
Tutor: WangJianHua
School: Northeastern University
Course: Analytical Chemistry
Keywords: multiwalled carbon nanotubes hyperbranched polyelectrolyte functionalization BSA solid-phase extraction
CLC: O629.73
Type: Master's thesis
Year: 2010
Downloads: 35
Quote: 0
Read: Download Dissertation


As a kind of biological macromolecules with bioactivity, proteins generally have poor stabilities. They tend to undergo significant conformational change in the process of purification, and adsorption-induced changes in the structure and dynamics have been observed which might reduce the biological activity of the proteins. In practice, the acquisition of high purity proteins from complex sample matrixes is a key issue for the development of proteomics. In this respect, a significant challenge is to develop new advanced materials for selective isolation of proteins from real world biological samples.A cationic hyperbranched polymer polyethyleneimine (BPEI) was immobilized on the surface of multiwalled carbon nanotubes (MWNTs) via electrostatic interaction between the positively charged protonated amines within the polymer and the carboxyl groups on the chemically oxidized MWNTs surface. The functionalized material of BPEI-MWNTs was characterized by FT-IR, TGA, TEM and surface charge analysis (Zeta potential), and it was used as a bio-sorbent for the adsorption of proteins, which exhibits high selectivity for bovine serum albumin (BSA) in the presence of other acidic and basic proteins with different isoelectric points. In practice, a micro-column packed with BPEI-MWNTs was incorporated into a sequential injection system for performing on-line separation and preconcentration of BSA in phosphate buffer, and the retained BSA was effectively recovered with citrate buffer as stripping reagent. The circular dichroism (CD) spectra showed no conformational change of BSA during the adsorption/desorption process. A dynamic adsorption capacity of167mg g-1for BSA was achieved, offering a6-fold improvement over that achieved by using linear polyelectrolyte poly(diallyldimethylammonium chloride) wrapped MWNTs. With a sample volume of2.0mL, an enrichment factor of10was obtained along with an adsorption efficiency of100%, a recovery of100%, a sampling frequency of10h-1and a RSD of2.6%at25μg mL-1BSA. The method was demonstrated by processing human whole blood for the selective isolation of human serum albumin, achieving satisfactory results as demonstrated by assay with SDS-PAGE.

Related Dissertations

  1. Studies on the Detection Methods of Virginiamycin in Feed,S816.17
  2. Electrochemical Studies on Interaction between ApoCopC、BSA and Cu(Ⅱ)、Cu(Ⅰ)、Cd(Ⅱ)、Ag(Ⅰ),O646
  3. Spectral and Electrochemical Research of Epirubicin Hydrochloride with Its Analytical Application,TQ465
  4. Determination of Trace Sulfonamides Residues in Animal Food,S859.84
  5. Preparation and Surface Functionalization of Mg-doped ZnO Quantum Dots,O614.241
  6. Multifunctional Magnetic Nanoparticles Used for EPR Bio-probes,TB383.1
  7. Preparation of Surface-functionalized Graphene and Its Influence on the Mechanical Properties of Nanocomposite Materials,TB332
  8. The Design and Application about Reactive Formaldehyde Sensor Based on Carbon Nanotubes,TP212.2
  9. Binding properties of Tb (Ⅲ), Eu (Ⅲ), the preparation of Sm (Ⅲ) and Sm-La- pyridine carboxylic acid complexes , characterization , and protein fluorescence properties and,O627
  10. Facile Preparation of Monodisperse Functional Polymer Microspheres and Their Magnetic Composite Microspheres,O631.3
  11. Antifouling Research of Polyethersulfone Membrane Used in BSA Solution Filtration,TQ028.8
  12. Research on the Surface Properties and Durability of Surface Texture of Cement Concrete Pavement,U416.216
  13. The Effect of Huangqichonglougushen on Expression of NF-ΚB in Membranous Nephropathy Rats,R285.5
  14. Preparation and Characterization of Carbon Nanotubes Supported Palladium and Gold Nanoparticles,TB383.1
  15. Preparation of Gold-Maghemite Nanocomposites,TB383.1
  16. Oxidative Aromatic C–O Bond Formation: Synthesis of 3-functionalized Benzo(b) Furans by FeCl3 -mediated Ring Closure of α-Aryl Ketones,O626.11
  17. Neuroprotective Role and the Mechanism Induced by Rapid Estrogen Signaling,R-332
  18. Synthesis of LaPO4: Eu Fluorescent Nanoparticles and Its Application in Biological Analysis,TB383.1
  19. Synthesis of YVO4: Eu Fluorescent Nanoparticles and Its Application in Biological Analysis,TB383.1
  20. The functionalized ACR toughened PA6 research,TQ323.6
  21. Sdudy on Oxygen Reduction Reaction of Low Temperature Fuel Cells and Electrocatalyst for Formic Acid Oxidation,TM911.4

CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Natural compounds > α-amino acids,peptides, proteins, nucleic acids > Protein
© 2012 www.DissertationTopic.Net  Mobile