Multifunctional nanoparticles composite for MALDI-MS: Cd2+-doped carbon nanotubes with CdS nanoparticles as the matrix, preconcentrating and accelerating probes of microwave enzymatic digestion of peptides and proteins for direct MALDI-MS analysis

2010 ◽  
Vol 45 (12) ◽  
pp. 1452-1460 ◽  
Author(s):  
Kamlesh Shrivas ◽  
Hui-Fen Wu
Keyword(s):  
Carbon Nanotubes ◽  
Enzymatic Digestion ◽  
Maldi Ms ◽  
Cds Nanoparticles ◽  
Multifunctional Nanoparticles ◽  
Ms Analysis ◽  
The Matrix

Immobilization of trypsin on water-soluble dendrimer-modified carbon nanotubes for on-plate proteolysis combined with MALDI-MS analysis

2010 ◽  
Vol 6 (8) ◽  
pp. 1447 ◽  
Author(s):  
Ying Zhang ◽  
Weiman Cao ◽  
Minbo Liu ◽  
Shiping Yang ◽  
Huixia Wu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Water Soluble ◽  
Maldi Ms ◽  
Ms Analysis ◽  
Modified Carbon Nanotubes

scholarly journals Carbon nanotubes as affinity probes for peptides and proteins in MALDI MS analysis

2004 ◽  
Vol 15 (11) ◽  
pp. 1629-1635 ◽  
Author(s):  
Wei-Yu Chen ◽  
Lung-Shen Wang ◽  
Hsin-Tien Chiu ◽  
Yu-Chie Chen ◽  
Chi-Young Lee
Keyword(s):  
Carbon Nanotubes ◽  
Maldi Ms ◽  
Ms Analysis ◽  
Affinity Probes

A Modified QuEChERS Extraction and LC-MS/MS Method for the Determination of Pesticide Residues in Curry Leaves (Murraya koenigii)

2019 ◽  
Vol 6 (1) ◽  
pp. 30-41
Author(s):  
Ranjith Arimboor ◽  
Karunkara Ramakrishna Menon ◽  
Natarajan Ramesh Babu ◽  
Haneesh Chandran
Keyword(s):  
Sample Preparation ◽  
Matrix Effect ◽  
Retention Time ◽  
Pesticide Residues ◽  
Mobile Phase ◽  
Preparation Technique ◽  
Modified Quechers ◽  
Curry Leaves ◽  
Ms Analysis ◽  
The Matrix

Background:Increased consumer demand for curry leaves free from pesticides demands fast and reliable analytical methods for the analysis of pesticide residues.Objective:The optimization of a QuEChERS based sample preparation technique with improved analytical accuracy by removing interfering matrix components for LC-MS/MS analysis of pesticide residues from curry leaves.Methods:A modified QuEChERS solid phase extraction method was developed and validated for the analysis of 26 pesticides in fresh and dried curry leaves. The effects of the sample preparation steps and column retention time on the matrix suppression of analyte ions were also evaluated.Results:Validation parameters were found within an acceptable range. The matrix effect evaluation studies showed that the QuEChERS sample preparation was able to minimize the ion suppression of analytes due to co-eluting matrix of components and that a d-SPE clean up step had major role in reducing matrix effect. The gradient mobile phase with longer retention time for analytes resulted in comparatively lesser matrix effects than the isocratic mobile phase of non-polar nature. Even after the clean up, a considerable number of compounds had more than 20% reduction in their MS response in the gradient mobile phase.Conclusion:This study emphasized the need of proper sample clean up before a LC-MS/MS analysis and the usage of matrix matched standards and mobile phase that ultimately results in an appropriate analyte separation in reasonable retention times.

scholarly journals Carbon Nanotubes and Polydopamine Modified Poly(dimethylsiloxane) Sponges for Efficient Oil–Water Separation

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2431
Author(s):  
Wen Zhang ◽  
Juanjuan Wang ◽  
Xue Han ◽  
Lele Li ◽  
Enping Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
Absorption Capacity ◽  
Potential Candidate ◽  
Hard Template ◽  
Water Separation ◽  
Industrial Oil ◽  
The Matrix ◽  
Oil Water Separation ◽  
Oil Water

In this paper, effective separation of oil from both immiscible oil–water mixtures and oil-in-water (O/W) emulsions are achieved by using poly(dimethylsiloxane)-based (PDMS-based) composite sponges. A modified hard template method using citric acid monohydrate as the hard template and dissolving it in ethanol is proposed to prepare PDMS sponge composited with carbon nanotubes (CNTs) both in the matrix and the surface. The introduction of CNTs endows the composite sponge with enhanced comprehensive properties including hydrophobicity, absorption capacity, and mechanical strength than the pure PDMS. We demonstrate the successful application of CNT-PDMS composite in efficient removal of oil from immiscible oil–water mixtures within not only a bath absorption, but also continuous separation for both static and turbulent flow conditions. This notable characteristic of the CNT-PDMS sponge enables it as a potential candidate for large-scale industrial oil–water separation. Furthermore, a polydopamine (PDA) modified CNT-PDMS is developed here, which firstly realizes the separation of O/W emulsion without continuous squeezing of the sponge. The combined superhydrophilic and superoleophilic property of PDA/CNT-PDMS is assumed to be critical in the spontaneously demulsification process.

Proteome profile of zebrafish caudal fin based on one-dimensional gel electrophoresis LCMS/MS and two-dimensional gel electrophoresis MALDI MS/MS analysis

2010 ◽  
Vol 34 (2) ◽  
pp. 225-232 ◽  
Author(s):  
Sachin K. Singh ◽  
Mula G. Meena Lakshmi ◽  
Sandeep Saxena ◽  
Cherukuvada V. Brahmendra Swamy ◽  
Mohammed M. Idris
Keyword(s):  
Gel Electrophoresis ◽  
Maldi Ms ◽  
Two Dimensional ◽  
Two Dimensional Gel Electrophoresis ◽  
Caudal Fin ◽  
One Dimensional ◽  
Ms Analysis ◽  
Proteome Profile

Novel co-matrix systems for the MALDI-MS analysis of polystyrene using a UV absorber and stabilizer

The Analyst ◽  
2013 ◽  
Vol 138 (4) ◽  
pp. 1256 ◽  
Author(s):  
Sung-Seen Choi ◽  
Hye-Seung Chung
Keyword(s):  
Maldi Ms ◽  
Uv Absorber ◽  
Ms Analysis

The Mechanism of Getting New Composite Polymer Materials with Improved Hardness Properties

2021 ◽  
Vol 887 ◽  
pp. 85-90
Author(s):  
L.S. Elbakyan ◽  
I.V. Zaporotskova ◽  
D.E. Vilkeeva
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Material ◽  
Single Layer ◽  
Scientific Basis ◽  
Strength Properties ◽  
Polymer Materials ◽  
Mechanical Mixing ◽  
Material Component ◽  
Adsorption Interaction ◽  
The Matrix

The main aims and the objectives of the study focused on solving current problems of nanomaterial science of new materials – creating the scientific basis for competitive methods of obtaining and controlling new composite materials having improved strength properties based on carbon-containing polymer matrices with nanotubes stabilized in them. A technology for obtaining experimental samples of nanocompositional polymer material based on polymethylmethacrylate, polybutylmethacrylate, and methacrylic acid doped with carbon nanotubes has been developed, using ultrasonic action and mechanical mixing of the composite mixture to achieve the most uniform distribution of nanotubes in the matrix. To determine the possibility of implementing the mechanism of adsorption interaction of the studied polymer material with the surface of carbon nanotubes, DFT calculations of the interaction of the polymer material component and single-layer carbon nanotubes of various types have been done.

Enhancement of Mechanical Properties by Reinforcing Magnesium With Ni-Coated Carbon Nanotubes

2010 ◽  
Author(s):  
M. H. Nai ◽  
C. S. Goh ◽  
S. M. L. Nai ◽  
J. Wei ◽  
M. Gupta
Keyword(s):  
Carbon Nanotubes ◽  
Load Transfer ◽  
Matrix Material ◽  
Strength Based ◽  
The Matrix ◽  
Rapid Sintering ◽  
Reinforcing Material ◽  
Coated Carbon ◽  
Strength And Ductility ◽  
Walled Cnts

In this study, carbon nanotubes (CNTs) are coated with nickel (Ni) to improve the wettability of the CNT surface and metal matrix, and allow an effective load transfer from the matrix to nanotubes. Pure magnesium is used as the matrix material and different weight percentages of Ni-coated multi-walled CNTs are incorporated as the reinforcing material. The nanocomposite materials are synthesized using the powder metallurgy route followed by microwave assisted rapid sintering. Mechanical property characterizations reveal an improvement of 0.2% yield strength, ultimate tensile strength and ductility with the addition of Ni-CNTs. As such, Ni-coated CNTs can be used as a reinforcement in magnesium to improve the formability of the material for light-weight, strength-based applications.

Properties of a Dielectric Elastomer Actuator Modified by Dispersion of Functionalised Carbon Nanotubes

2012 ◽  
Vol 79 ◽  
pp. 41-46 ◽  
Author(s):  
Fabia Galantini ◽  
Sabrina Bianchi ◽  
Valter Castelvetro ◽  
Irene Anguillesi ◽  
Giuseppe Gallone
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Mechanical Performance ◽  
Broad Class ◽  
Dielectric Elastomer ◽  
Low Dielectric ◽  
Dielectric Elastomer Actuators ◽  
Electromechanical Transduction ◽  
The Matrix ◽  
Simple Matrix

Among the broad class of electro-active polymers, dielectric elastomer actuators represent a rapidly growing technology for electromechanical transduction. In order to further develop this applied science, the high driving voltages currently needed must be reduced. For this purpose, one of the most promising and adopted approach is to increase the dielectric constant while maintaining both low dielectric losses and high mechanical compliance. In this work, a dielectric elastomer was prepared by dispersing functionalised carbon nanotubes into a polyurethane matrix and the effects of filler dispersion into the matrix were studied in terms of dielectric, mechanical and electro-mechanical performance. An interesting increment of the dielectric constant was observed throughout the collected spectrum while the loss factor remained almost unchanged with respect to the simple matrix, indicating that conductive percolation paths did not arise in such a system. Consequences of the chemical functionalisation of carbon nanotubes with respect to the use of unmodified filler were also studied and discussed along with rising benefits and drawbacks for the whole composite material.

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