Quantitative determination of oxidized carbon nanotube probes in yeast by capillary electrophoresis with laser-induced fluorescence detection

Product Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Short oxidized multi-walled carbon nanotubes were functionalized with fluorescein isothiocyanate to form carbon nanotube probes (CNTP). The distribution of CNTP in yeast was quantitatively determined by capillary electrophoresis coupled with laser-induced fluorescence detection. The detection sensitivity for CNTP was greatly improved comparing with UV absorbance and Raman detection. The time- and temperature-dependent influx patterns of CNTP into yeast were obtained. The apparent permeability coefficient for influx of CNTP into yeast was calculated, which suggested that CNTP might permeate into yeast through endocytosis. This study implies that CNTP could be a fine drug transporter and might be wildly used in multidrug resistance research and microorganism detection.

BUY FROM AMAZON–>> Quantitative determination of oxidized carbon nanotube probes in yeast by capillary electrophoresis with laser-induced fluorescence detection

Determination of trace thiocyanate with nano-silver coated multi-walled carbon nanotubes modified glassy carbon electrode

Product Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Novel nano-silver coated multi-walled carbon nanotube composites were prepared and used to fabricate a modified electrode. The application of the nano-silver coated multi-walled carbon nanotube composites modified electrode for determination of trace thiocyanate is demonstrated for the first time. The influence of substrate, pH and interference of coexisting substances was investigated for response properties of the electrode. There was a linear relationship at the range 2.5×10^-^9 to 5×10^-^8molL^-^1 and 5×10^-^8 to 1×10^-^6molL^-^1 of thiocyanate with the decrement of anodic DPV peak currents. The limit of detection was 1×10^-^9molL^-^1(S/N=3). The constructed electrode showed excellent reproducibility and stability. Actual urine and saliva samples of smoker and non-smoker were analyzed and satisfactory results were obtained. This method provides a new way to construct any electrode for biological and environmental analysis.

BUY FROM AMAZON–>> Determination of trace thiocyanate with nano-silver coated multi-walled carbon nanotubes modified glassy carbon electrode

Application of carbon nanotube-matrix assistant native polyacrylamide gel electrophoresis to the separation of apolipoprotein A-I and complement C3

Product Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The application of carbon nanotube polyacrylamide gel electrophoresis (PAGE) is being reported so as to improve selectivity of analysis. A novel polyacrylamide gel was manufactured by adding multi-walled carbon nanotubes (MWNT) when producing the polyacrylamide gel. Carbon nanotube-matrix assistance was used to separate apolipoprotein A-I and complement C3 with native polyacrylamide gel electrophoresis. Significant improvement of the relative selectivity was achieved in the separation between apolipoprotein A-I and complement C3, because of the hydrophobic change of the carbon nanotube surface non-covalently functionalized by the surfactant Triton X-100. These two proteins were identified by MS/MS after electrophoresis. The change of the observed mobility can also be noticed using other nanomaterials such as nano-TiO”2 and nano-Al”2O”3″, but no significant improvement of relative selectivities could be observed with the latter nanoparticles.

BUY FROM AMAZON–>> Application of carbon nanotube-matrix assistant native polyacrylamide gel electrophoresis to the separation of apolipoprotein A-I and complement C3

Electrochemical detection of trace insulin at carbon-nanotube-modified electrodes

Product Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Carbon-nanotube (CNT)-modified glassy-carbon electrodes dramatically accelerate the electrooxidation of insulin to offer an attractive amperometric detection of this important hormone. Hydrodynamic voltammograms indicate a substantial lowering of the detection potential, with oxidation starting above +0.5V (versus Ag/AgCl) and leveling off of the response above +0.7V. The flow-injection amperometric response (at pH 7.4) is highly linear (to at least 1000nM), reproducible (RSD=4.8%;n=30), and fast (peak width of 45s). The high sensitivity (48nA/@mM) and moderate detection potential (+0.8V) lead to a low detection limit of 14nM. Such performance characteristics compare favorably with those of previously reported metal-oxide-modified electrodes for insulin, and indicate great promise for in vivo measurements of insulin release and for monitoring this hormone in chromatographic effluents.

BUY FROM AMAZON–>> Electrochemical detection of trace insulin at carbon-nanotube-modified electrodes

Mechanical Properties of Polymers based on Nanostructure and Morphology

Product Description
The improvement of strength and durability in polymers has implications relevant to industrial, medical, and household applications. Enhanced by the improved knowledge of the interactions between complex hierarchical structures and functional requirements, Mechanical Properties of Polymers Based on Nanostructure and Morphology focuses on new polymer materials that possess a combination of improved mechanical and other physical properties.

This book specifies techniques used in structural and morphological characterization, discusses crazing and molecular variables of fracture behavior, and clarifies various modes of deformation mechanisms and orientation processes for semicrystalline polymers, block copolymers, and composites. The volume examines microindentation hardness studies and mechanisms of toughness enhancement for particle modified, amorphous and semicrystalline polymers and blends using model analysis. Experts in the field present innovations that illustrate new aspects of manufacturing, structure development, and properties of practical relevance in nanoparticle-filled thermoplastic polymers and the applications of carbon nanotube and nanofiber reinforced polymer systems. Other topics discussed in the book include alternative methods of polymer modification based on micro- and nanolayered polymers and hot compaction of oriented fibers and tapes.

This book reflects the continuing research of mechanisms contributing to the structure-function relationship of nanostructured polymers and nanocomposites. Mechanical Properties of Polymers Based on Nanostructure and Morphology presents effective ways to combine improved mechanical and physical properties in polymers and form new, performance-enhanced composite materials.

BUY FROM AMAZON–>> Mechanical Properties of Polymers based on Nanostructure and Morphology

Next Page »