Morteza Khaledi

Works (56)

Updated: February 10th, 2025 16:10

2017 journal article

Perfluorinated alcohol induced coacervates as extraction media for proteomic analysis

JOURNAL OF CHROMATOGRAPHY A, 1523, 293–299.

By: J. McCord n, D. Muddiman n  & M. Khaledi*

author keywords: Coacervation; Surfactants; Perfluorinated alcohol; Proteomics; Membrane proteins
MeSH headings : Membrane Proteins / isolation & purification; Propanols / chemistry; Proteome / analysis; Proteomics / methods; Saccharomyces cerevisiae / metabolism; Surface-Active Agents / chemistry
TL;DR: A novel method for using hexafluoroisopropanol induced coacervates with a variety of surfactants to extract proteins from a yeast whole cell lysate and conduct a global proteomic investigation on the extracted proteins is described. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2016 journal article

Perfluorinated Alcohols Induce Complex Coacervation in Mixed Surfactants

LANGMUIR, 32(10), 2321–2330.

By: S. Jenkins*, C. Collins * & M. Khaledi n

TL;DR: A novel type of biphasic separation in aqueous solutions of mixed cationic-anionic (catanionic) surfactants induced by hexafluoroisopropanol (HFIP) is described and suggests the formation of a catanionic complex in the coacervate phase through ion pairing with a concomitant release of the surfactant counterions into the aQueous-rich phase. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2015 journal article

Organic synthesis in fluoroalcohol-water two-phase systems

GREEN CHEMISTRY, 18(3), 681–685.

By: N. Weisner n & M. Khaledi n

Source: Web Of Science
Added: August 6, 2018

2015 journal article

Perfluoro-Alcohol-Induced Complex Coacervates of Polyelectrolyte-Surfactant Mixtures: Phase Behavior and Analysis

LANGMUIR, 31(20), 5580–5589.

By: M. Nejati n & M. Khaledi n

TL;DR: This paper focuses on HFIP-induced complex coacervate formation in the mixtures of anionic polyelectrolytes, such as sodium salt of poly(methac acrylic acid) or poly(acrylic acid) (PAA) and cationic surfactants of alkyltrimethylammonium bromides. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2014 journal article

Characterization and Classification of Pseudo-Stationary Phases in Micellar Electrokinetic Chromatography Using Chemometric Methods

ANALYTICAL CHEMISTRY, 86(5), 2371–2379.

By: C. Fu n & M. Khaledi n

TL;DR: Two types of chemometric methods, principal component analysis (PCA) and cluster analysis, are employed to characterize and classify a total of 70 pseudostationary phases in micellar electrokinetic chromatography, resulting in similar classifications with respect to the similarities and differences of the 70 micelle systems investigated. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2013 journal article

Perfluorinated Alcohols and Acids Induce Coacervation in Aqueous Solutions of Amphiphiles

LANGMUIR, 29(8), 2458–2464.

By: M. Khaledi n, S. Jenkins n & S. Liang n

MeSH headings : Alcohols / chemistry; Carboxylic Acids / chemistry; Hydrocarbons, Fluorinated / chemical synthesis; Hydrocarbons, Fluorinated / chemistry; Particle Size; Solutions; Surface Properties; Water / chemistry
TL;DR: It is discovered that water-miscible perfluorinated alcohols and acids (FA) can induce simple and complex coacervation in aqueous solutions of a wide range of amphiphilic molecules such as synthetic surfactants, phospholipids, and bile salts as well as polyelectrolytes. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2009 journal article

Micellar selectivity triangle for classification of chemical selectivity in electrokinetic chromatography

JOURNAL OF CHROMATOGRAPHY A, 1216(10), 1891–1900.

By: C. Fu n & M. Khaledi n

author keywords: Micelle selectivity triangle; Classification of pseudo-phases; Chemical selectivity; Electrokinetic chromatography; MEKC; Micelles; Polymers; Liposomes; Vesicles; Microemulsion; Solvent selectivity triangle
MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Hydrogen Bonding; Hydrogen-Ion Concentration; Liposomes / chemistry; Micelles; Models, Chemical; Polymers / chemistry; Solvents / chemistry
TL;DR: A novel micellar selectivity triangle (MST) is developed and used to characterize and classify the chemical selectivities of pseudo-phases in electrokinetic chromatography (EKC). (via Semantic Scholar)
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Added: August 6, 2018

2009 journal article

Selectivity patterns in micellar electrokinetic chromatography Characterization of fluorinated and aliphatic alcohol modifiers by micellar selectivity triangle

JOURNAL OF CHROMATOGRAPHY A, 1216(10), 1901–1907.

By: C. Fu n & M. Khaledi n

author keywords: MEKC; Electrokinetic chromatography; Micellar selectivity triangle; Selectivity classification; Alcohol-modified micelles; Fluorinated alcohols; Hexafluorolsopropanol; SDS; TTAB; LiPFOs; Solvation parameters
MeSH headings : Alcohols / chemistry; Alkanesulfonic Acids / chemistry; Chromatography, Micellar Electrokinetic Capillary / methods; Fluorocarbons / chemistry; Hydrogen Bonding; Hydrogen-Ion Concentration; Hydrophobic and Hydrophilic Interactions; Lithium / chemistry; Micelles; Models, Chemical; Sodium Dodecyl Sulfate / chemistry; Solvents / chemistry; Trimethyl Ammonium Compounds / chemistry
TL;DR: The results demonstrate the usefulness of the MST scheme for identifying pseudo-phases with highly similar or different selectivities and can serve as a guide for judicious selection of modifiers to create pseudo-Phases with desired selectivity behavior on a rational basis. (via Semantic Scholar)
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2005 journal article

Artificial neural network modeling of peptide mobility and peptide mapping in capillary zone electrophoresis

JOURNAL OF CHROMATOGRAPHY A, 1096(1-2), 58–68.

By: M. Jalali-Heravi n, Y. Shen n, M. Hassanisadi * & M. Khaledi n

author keywords: peptide mapping; capillary zone electrophoresis; electrophoretic mobility; artificial neural networks
MeSH headings : Amino Acid Sequence; Cytochromes c / chemistry; Electrophoresis, Capillary / methods; Glucagon / chemistry; Molecular Sequence Data; Multivariate Analysis; Neural Networks, Computer; Oligopeptides / isolation & purification; Peptide Fragments / chemistry; Peptide Mapping / methods; Regression Analysis
TL;DR: The present model exhibits better robustness than the MLR models in predicting CZE mobilities of a diverse data set at different experimental conditions and indicates the non-linear characteristics of the electrophoretic mobility of peptides. (via Semantic Scholar)
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2005 journal article

PH effects on drug interactions with lipid bilayers by liposome electrokinetic chromatography

JOURNAL OF CHROMATOGRAPHY A, 1079(1-2), 307–316.

By: J. Carrozzino n & M. Khaledi n

author keywords: liposome electrokinetic chromatography; drug; lipid bilayers; partition coefficient; lipophilicity; passive transmembrane permeability; caco-2 cell permeability; oral bioavailability
MeSH headings : Caco-2 Cells; Electrophoresis, Capillary / methods; Humans; Hydrogen-Ion Concentration; Lipid Bilayers / metabolism; Liposomes / chemistry; Pharmaceutical Preparations / metabolism
TL;DR: The effects of pH on the partitioning of basic drugs into liposomes composed of zwitterionic phosphatidylcholine, anionic phosph atidylglycerol, and cholesterol, which mimic the composition of natural cell membranes, were determined. (via Semantic Scholar)
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2005 journal article

Prediction of electrophoretic mobilities of peptides in capillary zone electrophoresis by quantitative structure-mobility relationships using the offord model and artificial neural networks

ELECTROPHORESIS, 26(10), 1874–1885.

By: M. Jalali-Heravi n, Y. Shen n, M. Hassanisadi n & M. Khaledi n

author keywords: artificial neural networks; capillary zone electrophoresis; electrophoretic mobility; peptide separation and mapping; structure-mobility relationship
MeSH headings : Electrophoresis, Capillary / methods; Neural Networks, Computer; Peptides / chemistry; Peptides / isolation & purification; Regression Analysis; Reproducibility of Results; Structure-Activity Relationship
TL;DR: A 3–4–1 back propagation artificial neural networks (BP‐ANN) model resulted in a significant improvement in the predictive ability of the QSMR over the MLR treatment, especially for peptides of higher charges that contain basic amino acids arginine, histidine, and lysine. (via Semantic Scholar)
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2004 journal article

Characterization of small unilamellar vesicles using solvatochromic pi* indicators and particle sizing

JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS, 60(2), 97–115.

By: J. Carrozzino n, E. Fuguet *, R. Helburn * & M. Khaledi n

author keywords: vesicles; liposomes; microenvironment polarity; electrokinetic chromatography; drug delivery
MeSH headings : Biophysics / methods; Cholesterol / chemistry; Chromatography; Coloring Agents / pharmacology; Dinitrobenzenes / chemistry; Dose-Response Relationship, Drug; Electron Spin Resonance Spectroscopy; Indicators and Reagents / pharmacology; Liposomes / chemistry; Micelles; Models, Chemical; Particle Size; Phosphatidylglycerols / chemistry; Phospholipids / chemistry; Photons; Spectrophotometry; Ultraviolet Rays
TL;DR: A suite of small unilamellar vesicles (SUVs) composed of mixtures of phospholipids and cholesterol or the synthetic surfactant dihexadecyl phosphate and cholesterol was investigated using a homologous series of solvatochromic pi* indicators coupled with size exclusion methods and photon correlation spectroscopy (PCS). (via Semantic Scholar)
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2004 journal article

Interaction of basic drugs with lipid bilayers using liposome electrokinetic chromatography

PHARMACEUTICAL RESEARCH, 21(12), 2327–2335.

By: J. Carrozzino n & M. Khaledi n

author keywords: basic drugs; liposomes; octanol; partitioning
MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Hydrogen-Ion Concentration; Lipid Bilayers / analysis; Lipid Bilayers / metabolism; Liposomes; Pharmaceutical Preparations / analysis; Pharmaceutical Preparations / metabolism
TL;DR: These studies demonstrate the overall buffer ionic strength at a given pH is more important than buffer type and concentration, and the interaction of positively charged drugs with charged lipid bilayer membranes is selectively influenced by the pKa of the drug. (via Semantic Scholar)
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2004 journal article

Predictions of micelle-water partition coefficients and retention in micellar electrokinetic chromatography from solute structure. 2. Fragmental constant approach

ANALYTICAL CHEMISTRY, 76(18), 5451–5458.

By: S. Burns n & M. Khaledi n

MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Computer Simulation; Electrochemistry / methods; Hydrocarbons / chemistry; Models, Chemical; Molecular Structure; Sodium Dodecyl Sulfate / chemistry; Solubility; Water / chemistry
TL;DR: The results show the great potential of the FCA for a priori prediction of retention behavior in MEKC from solute structure for complex molecular structures such as beta-blocker drugs. (via Semantic Scholar)
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2003 journal article

Evaluation of liposomal delivery of antisense oligonucleotide by capillary electrophoresis with laser-induced fluorescence detection

JOURNAL OF CHROMATOGRAPHY A, 1004(1-2), 39–46.

By: J. McKeon n & M. Khaledi n

author keywords: affinity capillary electrophoresis; oligonucleotides; liposomes
MeSH headings : Electrophoresis, Capillary / methods; HeLa Cells; Humans; Lasers; Liposomes; Luciferases / genetics; Oligonucleotides, Antisense / administration & dosage; Spectrometry, Fluorescence / methods
TL;DR: Two widely used commercial cationic liposome formulations, Lipofectamine and Escort, were evaluated for drug delivery efficacy with capillary electrophoresis coupled with laser-induced fluorescence detection using a fluorescein conjugated 2'-O-methyl-phosphorothioate (Me-PS) antisense oligonucleotide and the HeLa cell line. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2003 journal article

Monitoring liposome-mediated delivery and fate of an antisense drug in cell extracts and in single cells by capillary electrophoresis with laser-induced fluorescence

ELECTROPHORESIS, 24(6), 1054–1062.

By: A. Malek n & M. Khaledi n

author keywords: capillary electrophoresis-laser induced fluorescence; cell analysis; gene delivery; liposome; single cell
MeSH headings : Cell Extracts / chemistry; DNA, Antisense / administration & dosage; DNA, Antisense / analysis; DNA, Antisense / chemistry; Electrophoresis, Capillary / methods; Endopeptidase K / metabolism; Gene Transfer Techniques; HeLa Cells; Humans; Lasers; Liposomes / administration & dosage; Liposomes / chemistry; Sodium Dodecyl Sulfate; Spectrometry, Fluorescence / methods
TL;DR: It was observed that uptake of the liposome‐antisense complex by the cell was dependent on concentration of lipid, duration of transfection, and the cell type, and uptake variations agreed with those obtained from flow cytometry analysis. (via Semantic Scholar)
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2003 journal article

Separation of peptides and proteins by capillary electrophoresis using acidic buffers containing tetraalkylammonium cations and cyclodextrins

ELECTROPHORESIS, 24(5), 824–828.

By: C. Quang n, A. Malek* & M. Khaledi n

author keywords: cyclodextrin; dynamic coating; electroosmotic flow control; peptides map; protein separations
MeSH headings : Buffers; Cations; Cyclodextrins / chemistry; Electrophoresis, Capillary / methods; Hemoglobins / chemistry; Hydrogen-Ion Concentration; Peptides / analysis; Peptides / chemistry; Proteins / analysis; Proteins / chemistry; Quaternary Ammonium Compounds / chemistry; Surface-Active Agents; Time Factors; Trypsin
TL;DR: The combining effect of reversing electroosmotic flow and cyclodextrin inclusion complexation on separations of closely related peptides and a protein mixture, as well as tryptic digest of hemoglobin is demonstrated. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2003 journal article

Study of solute partitioning into cationic vesicles of dihexadecyldimethylammonium bromide using electrokinetic chromatography

JOURNAL OF CHROMATOGRAPHY A, 1004(1-2), 145–153.

By: A. Agbodjan n & M. Khaledi n

author keywords: pseudo-stationary phases; linear solvation energy relationships; dihexadecyldimethylammonium bromide
MeSH headings : Cations; Chromatography, Micellar Electrokinetic Capillary / methods; Hydrogen Bonding; Quaternary Ammonium Compounds / chemistry
TL;DR: A linear solvation energy relationship was successfully used to characterize the interaction of neutral solutes with the cationic vesicles in electrokinetic chromatography. (via Semantic Scholar)
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2002 journal article

A mixed ionic block copolymer-surfactant pseudostationary phase in micellar electrokinetic chromatography

JOURNAL OF SEPARATION SCIENCE, 25(15-17), 1019–1026.

By: M. Leonard n & M. Khaledi*

author keywords: micellar electrokinetic chromatography (MEKC); mixed micelles; linear solvation energy relationships; solvatochromic probes; polymeric pseudo-stationary phase
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2002 journal article

Characterization of solvation properties of lipid bilayer membranes in liposome electrokinetic chromatography

JOURNAL OF CHROMATOGRAPHY A, 973(1-2), 167–176.

By: S. Burns n, A. Agbodjan n & M. Khaledi n

author keywords: electrokinetic chromatography; solvation; membranes; lipid bilayer; linear solvation energy relationships; liposome electrokinetic chromatography; lipids; liposomes; phospholipids; cholesterol
MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Lipid Bilayers; Liposomes; Membranes, Artificial; Models, Theoretical; Solubility
TL;DR: There exist subtle differences in the solvation properties of liposomes as compared to those of octanol and various micellar pseudo-phases such as aggregates of sodium dodecyl sulfate, sodium cholate, and tetradecylammonium bromide, while octanol, SC, and TTAB micelles exhibit closersolvation properties. (via Semantic Scholar)
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2002 journal article

Determination of vesicle-water partition coefficients by electrokinetic chromatography: Study of temperature effect

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 253(2), 397–401.

By: H. Bui n & M. Khaledi n

author keywords: bilayer; vesicles; partition coefficients; LSER; phase transition; capillary electrophoresis
MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Organophosphates / chemistry; Phase Transition; Solutions / chemistry; Surface-Active Agents / chemistry; Temperature; Water / chemistry
TL;DR: Vesicular electrokinetic chromatography was used to investigate solute partitioning from the aqueous phase into dihexadecyl hydrogen phosphate (DHP) vesicles and offered the advantages of speed, automation, and small sample size for determination of partition coefficients. (via Semantic Scholar)
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2002 journal article

Rapid determination of liposome-water partition coefficients (K-lw) using liposome electrokinetic chromatography (LEKC)

JOURNAL OF PHARMACEUTICAL SCIENCES, 91(7), 1601–1612.

By: S. Burns n & M. Khaledi n

author keywords: LEKC; liposome-water partition coefficients; octanol-water partition coefficients
MeSH headings : Chromatography / methods; Electrophoresis, Capillary / methods; Liposomes / analysis; Liposomes / pharmacokinetics; Solutions; Water / analysis; Water / chemistry
TL;DR: How LEKC can be used to determine Klw for both neutral and charged solutes is described and the usefulness of two quantitative structure partition relationships (QSPR) for estimation of Klw is demonstrated. (via Semantic Scholar)
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2002 journal article

Separation and characterization of human high-density apolipoproteins using a nonaqueous modifier in capillary electrophoresis-mass spectrometry

ELECTROPHORESIS, 23(14), 2296–2305.

By: L. Deterding *, J. Cutalo*, M. Khaledi n & K. Tomer*

author keywords: apolipoproteins; capillary electrophoresis; high-density lipoproteins; mass spectrometry; tandem mass spectrometry
TL;DR: The separation and characterization of human apolipoproteins and their isoforms was investigated using capillary electrophoresis (CE) in combination with mass spectrometry (MS), and it is suggested that the multiple components observed in the acetonitrile‐containing CE separation appear to be oxidized forms of the proteins in addition to native form of the apoipoprotein A‐I and A‐II. (via Semantic Scholar)
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2001 journal article

Prediction of retention in micellar electrokinetic chromatography from solute structure. 1. Sodium dodecyl sulfate micelles

Analytical Chemistry, 73(24), 6057–6062.

By: K. Kelly, S. Burns & M. Khaledi

Source: NC State University Libraries
Added: August 6, 2018

2001 journal article

Quantitation of intracellular concentration of a delivered morpholino oligomer by capillary electrophoresis-laser-induced fluorescence: Correlation with upregulation of luciferase gene expression

ANALYTICAL BIOCHEMISTRY, 293(1), 1–7.

By: J. McKeon n, M. Cho* & M. Khaledi n

author keywords: antisense; intracellular; capillary electrophoresis; gene expression
MeSH headings : Cell Membrane / physiology; Drug Delivery Systems; Electrophoresis, Capillary / methods; Fluoresceins; Fluorescence; Fluorescent Dyes; Gene Expression; HeLa Cells / metabolism; Humans; Lasers; Luciferases / genetics; Membrane Fluidity; Microscopy, Confocal; Oligonucleotides, Antisense / analysis; Pharmaceutical Preparations / analysis; Up-Regulation
TL;DR: To the best knowledge, this is the first reported quantitative correlation between delivered antisense concentration in a cell extract and the subsequent antisense upregulation of gene expression. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2001 journal article

Quantitative nuclear and cytoplasmic localization of antisense oligonucleotides by capillary electrophoresis with laser-induced fluorescence detection

ELECTROPHORESIS, 22(17), 3765–3770.

By: J. McKeon n & M. Khaledi n

author keywords: oligonucleotide; capillary electrophoresis; subcellular distribution
TL;DR: The use of simple extraction procedures to separate nuclear and cytoplasmic material from cell extracts, which have been scrape‐loaded with a 2‐O‐methyl phosphorothioate antisense oligonucleotide are demonstrated. (via Semantic Scholar)
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2001 journal article

Study of solute partitioning in biomembrane-mimetic pseudophases by electrokinetic chromatography: Dihexadecyl phosphate small unilamellar vesicles

LANGMUIR, 17(10), 2893–2899.

By: A. Agbodjan n, H. Bui n & M. Khaledi n

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2000 journal article

Calculation of electrophoretic mobilities in water-organic modifier mixtures in capillary electrophoresis

JOURNAL OF CHROMATOGRAPHY A, 868(2), 277–284.

By: A. Jouyban-Gharamaleki, M. Khaledi n & B. Clark *

author keywords: electrophoretic mobility; background electrolyte composition; mathematical modelling; organic acids
MeSH headings : Electrophoresis, Capillary / methods; Models, Chemical; Organic Chemicals / chemistry; Water / chemistry
TL;DR: In order to correlate/predict electrophoretic mobility data in the mixture of water+organic modifier four equations have been presented and examined and the experimental mobilities of five analytes were determined in a water-methanol mixture. (via Semantic Scholar)
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2000 journal article

Characterization of chemical selectivity in micellar electrokinetic chromatography VI. Effects of surfactant counter-ion

JOURNAL OF CHROMATOGRAPHY A, 888(1-2), 229–240.

By: M. Trone n, J. Mack n, H. Goodell n & M. Khaledi n

author keywords: selectivity; linear solvation energy relationships; micellar electrokinetic chromatography; surfactants
MeSH headings : Chromatography, Micellar Electrokinetic Capillary / instrumentation; Sensitivity and Specificity; Surface-Active Agents / chemistry; Thermodynamics
TL;DR: It was determined that selectivity differences are dependent on the valency of the counter-ion but not the type ofcounter-ion, and it is believed that the divalent counter-ions reduce the electrostatic repulsion between the surfactant head groups and therefore, increase the chain packing of the monomers in the micelle aggregates. (via Semantic Scholar)
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2000 journal article

Characterization of chemical selectivity in micellar electrokinetic chromatography: V. The effect of the surfactant hydrophobic chain

JOURNAL OF MICROCOLUMN SEPARATIONS, 12(8), 433–441.

By: M. Trone n & M. Khaledi n

author keywords: micellar electrokinetic chromatography (MEKC); capillary electrophoresis; linear solvation energy relationships (LSER); surfactant chain length; surfactant head group; chromatographic selectivity
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2000 journal article

Congeneric behavior in estimations of octanol-water partition coefficients by micellar electrokinetic chromatography

ANALYTICAL CHEMISTRY, 72(6), 1228–1235.

By: M. Trone n, M. Leonard n & M. Khaledi n

MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Hydrogen Bonding; Octanols / chemistry; Water / chemistry
TL;DR: Linear Solvation Energy Relationships (LSERs) are used to explain the congeneric behavior observed when using Micellar Electrokinetic Chromatography (MEKC) to estimate the octanol-water partition coefficient scale of solute hydrophobicity. (via Semantic Scholar)
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2000 journal article

Detection and sequencing of phosphopeptides affinity bound to immobilized metal ion beads by matrix-assisted laser desorption/ionization mass spectrometry

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 11(4), 273–282.

By: W. Zhou n, B. Merrick *, M. Khaledi n & K. Tomer*

MeSH headings : Amino Acid Sequence; Carboxypeptidases; Caseins / chemistry; Cathepsin A; Chromatography, Affinity; Gallium; Hydrolysis; Indicators and Reagents; Iron; Metals / chemistry; Molecular Sequence Data; Phosphopeptides / analysis; Phosphopeptides / isolation & purification; Phosphorylation; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; Trypsin
TL;DR: The usefulness of this method was demonstrated by analyzing two commercially available phosphoproteins, β-casein and α- casein, as well as one phosphopeptide from a kinase reaction mixture, which eliminates the need for prior high-performance liquid chromatography separation or radiolabeling, thus greatly simplifying the sample preparation. (via Semantic Scholar)
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2000 review

Enantiomeric separations by nonaqueous capillary electrophoresis

[Review of ]. JOURNAL OF CHROMATOGRAPHY A, 875(1-2), 277–293.

By: F. Wang* & M. Khaledi n

MeSH headings : Electrophoresis, Capillary / methods; Stereoisomerism; Water
TL;DR: This paper reviews the recent advances in enantioseparations by nonaqueous capillary electrophoresis (NACE) and the effect of organic solvents on mobility of enantiomers, separation selectivity and resolution, and reported applications of NACE separations of racemates. (via Semantic Scholar)
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2000 journal article

Evaluation of the binding between potential anti-HIV DNA-based drugs and viral envelope glycoprotein gp120 by capillary electrophoresis with laser-induced fluorescence detection

ANALYTICAL BIOCHEMISTRY, 284(2), 334–341.

By: W. Zhou n, K. Tomer* & M. Khaledi n

author keywords: phosphorothioate oligodeoxynucleotide; HIV envelope glycoprotein gp120; affinity-capillary electrophoresis; laser-induced fluorescence detection
MeSH headings : Anti-HIV Agents / metabolism; Base Sequence; Binding, Competitive; DNA Primers; Electrophoresis, Capillary / methods; Evaluation Studies as Topic; HIV Envelope Protein gp120 / metabolism; HIV-1 / metabolism; Lasers; Protein Binding; Spectrometry, Fluorescence
TL;DR: Capillary electrophoresis with laser-induced fluorescence detection (CE-LIF) was used to systematically evaluate binding between Sd and HIV-1 gp120 and showed that the interaction had a strong dependence on the sulfur phosphorothioate backbone. (via Semantic Scholar)
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2000 journal article

Influence of ester and amide-containing surfactant headgroups on selectivity in micellar electrokinetic chromatography

ELECTROPHORESIS, 21(12), 2390–2396.

By: M. Trone n & M. Khaledi n

author keywords: micellar electrokinetic chromatography; surfactant head-group; linear solvation relationships
TL;DR: While both the solute size and hydrogen bond accepting ability were found to be the most important factors in solute retention, the hydrogen bonding characteristic of the solutes have the largest influence on selectivity differences between surfactants. (via Semantic Scholar)
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2000 journal article

Separation of acidic solutes by nonaqueous capillary electrophoresis in acetonitrile-based media - Combined effects of deprotonation and heteroconjugation

JOURNAL OF CHROMATOGRAPHY A, 888(1-2), 251–266.

By: J. Miller n, D. Shea*  & M. Khaledi n

Contributors: J. Miller n, D. Shea*  & M. Khaledi n

author keywords: nonaqueous capillary electrophoresis; deprotonation; heteroconjugation; selectivity; electrophoretic mobility; phenols; chlorophenols; nitrophenols
MeSH headings : Acetonitriles / chemistry; Acids / isolation & purification; Buffers; Electrophoresis, Capillary / methods; Environmental Pollutants / isolation & purification; Protons
TL;DR: The combination of heteroconjugation and deprotonation in the NACE separation of phenols using acetonitrile (ACN) as the buffer solvent shows low viscosity and often leads to rapid and efficient separations that are not possible in aqueous media. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2000 journal article

Statistical evaluation of linear solvation energy relationship models used to characterize chemical selectivity in micellar electrokinetic chromatography

JOURNAL OF CHROMATOGRAPHY A, 886(1-2), 245–257.

By: M. Trone n & M. Khaledi n

author keywords: linear solvation energy relationships; micellar electrokinetic chromatography; statistical analysis; surfactants
MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Models, Chemical
TL;DR: The revised model and parameters have been found to yield a statistically better fit of the MEKC retention data as well as providing more chemically sound LSER coefficients. (via Semantic Scholar)
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7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1999 journal article

Capillary electrophoresis chiral separation of basic pharmaceutical enantiomers with different charges using sulfated beta-cyclodextrin

JOURNAL OF MICROCOLUMN SEPARATIONS, 11(1), 11–21.

By: F. Wang n & M. Khaledi n

author keywords: capillary electrophoresis; chiral separations; charged cyclodextrin; basic pharmaceutical enantiomers
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Source: Web Of Science
Added: August 6, 2018

1999 journal article

Characterization of chemical selectivity in micellar electrokinetic chromatography. 4. Effect of surfactant headgroup

ANALYTICAL CHEMISTRY, 71(7), 1270–1277.

By: M. Trone n & M. Khaledi n

MeSH headings : Chromatography, Micellar Electrokinetic Capillary / methods; Hydrogen Bonding; Surface-Active Agents / chemistry
TL;DR: The results suggest that the hydrogen-bond-accepting ability for surfactants is inversely proportional to the proton acidity of its headgroup. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

1999 journal article

Direct analysis of the products of sequential cleavages of peptides and proteins affinity-bound to immobilized metal ion beads by matrix-assisted laser desorption/ionization mass spectrometry

ANALYTICAL BIOCHEMISTRY, 274(2), 174–180.

By: X. Qian*, W. Zhou n, M. Khaledi n & K. Tomer*

author keywords: MALD/TOF/MS; immobilized metal ionaffinity chromatography; protein synthesis error
MeSH headings : Amino Acid Sequence; Chromatography, Affinity / methods; Gene Products, vif / analysis; HIV Core Protein p24 / analysis; HIV-1; Metals; Molecular Sequence Data; Proteins / analysis; Recombinant Proteins / analysis; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / methods; Viral Proteins / analysis; vif Gene Products, Human Immunodeficiency Virus
TL;DR: The high specificity, sensitivity, and speed of analysis make this method especially useful in obtaining N-terminal sequencing information of histidine-tagged recombinant proteins. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

1999 journal article

Efficiency studies in nonaqueous capillary electrophoresis

JOURNAL OF CHROMATOGRAPHY A, 859(2), 203–219.

By: V. Ward n & M. Khaledi n

author keywords: nonaqueous capillary electrophoresis; efficiency; buffer composition; oligosaccharides
MeSH headings : Buffers; Electrophoresis, Capillary / methods; Formamides; Indicators and Reagents; Oligosaccharides / isolation & purification; Quality Control; Sensitivity and Specificity; Water
TL;DR: This study investigated the influence of NACE compared to aqueous CE on the separation efficiency of oligosaccharides and found a 1.5-fold enhancement in efficiency was obtained with the nonaqueous buffer medium. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

1999 journal article

Expression and analysis of green fluorescent proteins in human embryonic kidney cells by capillary electrophoresis

ANALYTICAL BIOCHEMISTRY, 268(2), 262–269.

By: A. Malek n & M. Khaledi n

MeSH headings : Cell Line; Electrophoresis, Capillary / methods; Evaluation Studies as Topic; Gene Expression; Genes, Reporter; Green Fluorescent Proteins; Humans; Kinetics; Lasers; Luminescent Proteins / analysis; Luminescent Proteins / biosynthesis; Luminescent Proteins / genetics; Microscopy, Fluorescence; Mutagenesis, Site-Directed; Recombinant Proteins / analysis; Recombinant Proteins / biosynthesis; Recombinant Proteins / genetics; Transfection
TL;DR: Application of capillary electrophoresis with laser-induced fluorescent (CE-LIF) for quantitation of green fluorescence protein in cellular extracts and single cells is investigated and single cell analysis of HEK293 cells after transfection with GFP plasmid indicates a nonuniform production of S65T-GFP protein among cells. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

1999 article

Non-aqueous capillary electrophoresis chiral separations with sulfated beta-cyclodextrin

Wang, F., & Khaledi, M. G. (1999, August 20). JOURNAL OF CHROMATOGRAPHY B, Vol. 731, pp. 187–197.

By: F. Wang  n & M. Khaledi n

author keywords: enantiomer separation; sulfated beta-cyclodextrin
MeSH headings : Cyclodextrins / chemistry; Electrophoresis, Capillary / methods; Formamides / chemistry; Hydrogen-Ion Concentration; Solvents; Sulfates / chemistry; Water; beta-Cyclodextrins
TL;DR: Upon complexation with the anionic CD, electrophoretic mobilities of the basic enantiomers decreased, however, both separation selectivity and resolution were enhanced by non-aqueous capillary electrophoresis (NACE). (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1999 journal article

Steroid analysis in single cells by capillary electrophoresis with collinear laser-induced fluorescence detection

ANALYTICAL BIOCHEMISTRY, 270(1), 50–58.

By: A. Malek n & M. Khaledi n

MeSH headings : Animals; Cell Line; Dansyl Compounds; Electrophoresis, Capillary / methods; Fluorescence; Hydrazines; Lasers; Models, Chemical; Progesterone / analysis; Rats
TL;DR: Dansylhydrazine proved to be an effective fluorescent tag for derivatization of steroids outside and inside the biological cell and a dimethyl sulfoxide-containing physiological buffer was sufficient to incorporate the tag inside the cell for subsequent steroid derivatized. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

1998 chapter

Applications of micellar electrokinetic chromatography in quantitative structure-activity relationship studies: Estimation of log P-ow and bioactivity

In High-performance capillary electrophoresis: theory, techniques, and applications (Vol. 146, pp. 999–1014). New York: John Wiley & Sons.

By: M. Khaledi

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Capillary electrochromatography

In High-performance capillary electrophoresis: theory, techniques, and applications (Vol. 146, pp. 277–299). New York: John Wiley & Sons.

By: K. Kelly & M. Khaledi

Source: NC State University Libraries
Added: August 6, 2018

1998 journal article

Capillary electrophoresis chiral separations of basic compounds using cationic cyclodextrin

ELECTROPHORESIS, 19(12), 2095–2100.

By: F. Wang n & M. Khaledi n

author keywords: capillary electrophoresis; chiral separations; cationic cyclodextrin; basic racemates
MeSH headings : Amines / isolation & purification; Cations; Cyclodextrins; Electrophoresis, Capillary / methods; Heterocyclic Compounds, 3-Ring / isolation & purification; Hydrogen-Ion Concentration; Stereoisomerism; beta-Cyclodextrins
TL;DR: Chiral separations of basic enantiomers were carried out by using a cationic cyclodextrin (CD), quaternary ammonium β‐cyclodeXTrin (QA‐β‐CD), under counter‐electroosmotic flow (counter‐EOF) conditions, which eliminated the peak tailing problem caused by electrodi‐spersion. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1998 article

Characterization of mixed micellar pseudostationary phases in electrokinetic chromatography using linear solvation energy relationships

Khaledi, M. G., Bumgarner, J. G., & Hadjmohammadi, M. (1998, April 3). JOURNAL OF CHROMATOGRAPHY A, Vol. 802, pp. 35–47.

By: M. Khaledi n, J. Bumgarner n & M. Hadjmohammadi n

author keywords: linear solvation energy relationships; selectivity, pseudostationary phases; micelles, mixed; micellar electrokinetic chromatography; bile salts; sodium dodecyl sulfate
MeSH headings : Cholagogues and Choleretics / chemistry; Cholic Acid; Cholic Acids / chemistry; Deoxycholic Acid / chemistry; Electrophoresis, Capillary / methods; Hydrogen Bonding; Linear Models; Micelles; Osmolar Concentration; Sodium Dodecyl Sulfate / chemistry; Solvents / chemistry; Surface-Active Agents / chemistry
TL;DR: It was concluded that hydrogen bonding interactions have a significant effect on selectivity of these pseudostationary phases in electrokinetic chromatography. (via Semantic Scholar)
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7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1998 book

High-performance capillary electrophoresis: Theory, techniques, and applications

New York: John Wiley & Sons.

By: M. Khaledi

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Micellar electrokinetic chromatography

In High-performance capillary electrophoresis: theory, techniques, and applications (Vol. 146, pp. 77–140). New York: John Wiley & Sons.

By: M. Khaledi

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Nonaqueous capillary electrophoresis

In High-performance capillary electrophoresis: theory, techniques, and applications (Vol. 146, pp. 525–555). New York: John Wiley & Sons.

By: J. Miller & M. Khaledi

Source: NC State University Libraries
Added: August 6, 2018

1998 article

Nonaqueous capillary electrophoresis chiral separations with quaternary ammonium beta-cyclodextrin

Wang, F., & Khaledi, M. G. (1998, August 21). JOURNAL OF CHROMATOGRAPHY A, Vol. 817, pp. 121–128.

By: F. Wang n & M. Khaledi n

author keywords: enantiomer separation; buffer composition; non-steroidal anti-inflammatory drugs; amino acids; profens; binaphthyldiyl hydrogenphosphate; naphthylethylphthalamic acid
MeSH headings : Anti-Inflammatory Agents, Non-Steroidal / isolation & purification; Cyclodextrins / chemistry; Electrophoresis, Capillary / methods; Hydrogen-Ion Concentration; Quaternary Ammonium Compounds / chemistry; Solvents; Stereoisomerism; beta-Cyclodextrins
TL;DR: No chiral separation of the profens was achieved in the following solvents: N-methylformamide, methanol, dimethyl sulfoxide, and water; however, chiral separations of most of the amino acids were obtained in all of thesesolvents. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1998 journal article

Nonaqueous capillary electrophoresis with laser induced fluorescence detection

JOURNAL OF CHROMATOGRAPHY B, 718(1), 15–22.

By: V. Ward n & M. Khaledi n

author keywords: nonaqueous capillary electrophoresis; N-methylformamide
MeSH headings : Calibration; Electrophoresis, Capillary / methods; Fluorescence; Formamides; Lasers; Naphthalenes; Sensitivity and Specificity; Solvents
TL;DR: The use of nonaqueous capillary electrophoresis (NACE) with laser induced fluorescence (LIF) to improve detection sensitivity and extent (or degree) of enhancement in fluorescence intensity seems to be related to the viscosity and/or polarity of the solvent. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

1998 journal article

Separation of hydrophobic solutes by nonaqueous capillary electrophoresis through dipolar and charge-transfer interactions with pyrylium salts

JOURNAL OF MICROCOLUMN SEPARATIONS, 10(8), 681–685.

By: J. Miller n, M. Khaledi n & D. Shea n 

Contributors: J. Miller n, M. Khaledi n & D. Shea n 

author keywords: polycyclic aromatic hydrocarbons; nonaqueous media; acetonitrile pyrylium ion; charge-transfer complexation
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UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

1997 review

Micelles as separation media in high-performance liquid chromatography and high-performance capillary electrophoresis: overview and perspective

[Review of ]. JOURNAL OF CHROMATOGRAPHY A, 780(1-2), 3–40.

By: M. Khaledi n

author keywords: reviews; micellar liquid chromatography; micellar electrokinetic chromatography
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Source: Web Of Science
Added: August 6, 2018

1997 journal article

Separation of polycyclic aromatic hydrocarbons by nonaqueous capillary electrophoresis using charge-transfer complexation with planar organic cations

ANALYTICAL CHEMISTRY, 69(6), 1223–1229.

By: J. Miller n, M. Khaledi n & D. Shea n 

Contributors: J. Miller n, M. Khaledi n & D. Shea n 

MeSH headings : Cations / chemistry; Electrophoresis, Capillary / methods; Osmolar Concentration; Polycyclic Aromatic Hydrocarbons / isolation & purification; Solutions
TL;DR: It was found that, in addition to charge-transfer interactions, electrostatic and dispersive forces play an important role in PAH-cation binding. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

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