A hybrid separation technique combining both chromatographic and electrophoretic separation principles. While the method was invented to separate neutral species, it can also be applied to charged molecules such as small peptides.
A plant genus of the family APIACEAE. Members contain osthol.
A group of naturally occurring amines derived by enzymatic decarboxylation of the natural amino acids. Many have powerful physiological effects (e.g., histamine, serotonin, epinephrine, tyramine). Those derived from aromatic amino acids, and also their synthetic analogs (e.g., amphetamine), are of use in pharmacology.
Inorganic or organic salts and esters of boric acid.
A metabolite of primidone.
A highly-sensitive (in the picomolar range, which is 10,000-fold more sensitive than conventional electrophoresis) and efficient technique that allows separation of PROTEINS; NUCLEIC ACIDS; and CARBOHYDRATES. (Segen, Dictionary of Modern Medicine, 1992)
The minute vessels that connect the arterioles and venules.
A bile salt formed in the liver by conjugation of deoxycholate with taurine, usually as the sodium salt. It is used as a cholagogue and choleretic, also industrially as a fat emulsifier.
Eight-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives.
A plant species of the family VACCINIUM.
A plant genus of the genus STRYCHNOS, family LOGANIACEAE that is the source of STRYCHNINE.
Compounds in which a methyl group is attached to the cyano moiety.
Heterocyclic rings containing three nitrogen atoms, commonly in 1,2,4 or 1,3,5 or 2,4,6 formats. Some are used as HERBICIDES.
Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses (POACEAE), and woody plants. Some plants develop HERBICIDE RESISTANCE.
A foul-smelling diamine formed by bacterial decarboxylation of lysine.
A separation technique which combines LIQUID CHROMATOGRAPHY and CAPILLARY ELECTROPHORESIS.
A highly miniaturized version of ELECTROPHORESIS performed in a microfluidic device.
Methods utilizing the principles of MICROFLUIDICS for sample handling, reagent mixing, and separation and detection of specific components in fluids.
The preparation and analysis of samples on miniaturized devices.
The analysis of a chemical substance by inserting a sample into a carrier stream of reagent using a sample injection valve that propels the sample downstream where mixing occurs in a coiled tube, then passes into a flow-through detector and a recorder or other data handling device.
Exclusive legal rights or privileges applied to inventions, plants, etc.
A plant genus in the CANNABACEAE family. Best known for the buds of Humulus lupulus L. used in BEER.
An alcoholic beverage usually made from malted cereal grain (as barley), flavored with hops, and brewed by slow fermentation.
Six-carbon alicyclic hydrocarbons which contain one or more double bonds in the ring. The cyclohexadienes are not aromatic, in contrast to BENZOQUINONES which are sometimes called 2,5-cyclohexadiene-1,4-diones.
A class of compounds composed of repeating 5-carbon units of HEMITERPENES.
Occupations of medical personnel who are not physicians, and are qualified by special training and, frequently, by licensure to work in supporting roles in the health care field. These occupations include, but are not limited to, medical technology, physical therapy, physician assistant, etc.
Development of a library collection, including the determination and coordination of selection policy, assessment of needs of users and potential users, collection use studies, collection evaluation, identification of collection needs, selection of materials, planning for resource sharing, collection maintenance and weeding, and budgeting.
The use of a layer of tooth-colored material, usually porcelain or acrylic resin, applied to the surface of natural teeth, crowns, or pontics by fusion, cementation, or mechanical retention.
A type of porcelain used in dental restorations, either jacket crowns or inlays, artificial teeth, or metal-ceramic crowns. It is essentially a mixture of particles of feldspar and quartz, the feldspar melting first and providing a glass matrix for the quartz. Dental porcelain is produced by mixing ceramic powder (a mixture of quartz, kaolin, pigments, opacifiers, a suitable flux, and other substances) with distilled water. (From Jablonski's Dictionary of Dentistry, 1992)
Substances and materials manufactured for use in various technologies and industries and for domestic use.
A class of devices combining electrical and mechanical components that have at least one of the dimensions in the micrometer range (between 1 micron and 1 millimeter). They include sensors, actuators, microducts, and micropumps.
Any change in the hue, color, or translucency of a tooth due to any cause. Restorative filling materials, drugs (both topical and systemic), pulpal necrosis, or hemorrhage may be responsible. (Jablonski, Dictionary of Dentistry, 1992, p253)
The plan and delineation of dental prostheses in general or a specific dental prosthesis. It does not include DENTURE DESIGN. The framework usually consists of metal.
A prosthesis or restoration placed for a limited period, from several days to several months, which is designed to seal the tooth and maintain its position until a permanent restoration (DENTAL RESTORATION, PERMANENT) will replace it. (From Jablonski, Dictionary of Dentistry, 1992)
Facilities which provide information concerning poisons and treatment of poisoning in emergencies.
A condition or physical state produced by the ingestion, injection, inhalation of or exposure to a deleterious agent.
A colorless, odorless, viscous dihydroxy alcohol. It has a sweet taste, but is poisonous if ingested. Ethylene glycol is the most important glycol commercially available and is manufactured on a large scale in the United States. It is used as an antifreeze and coolant, in hydraulic fluids, and in the manufacture of low-freezing dynamites and resins.
An ethylene compound with two hydroxy groups (-OH) located on adjacent carbons. They are viscous and colorless liquids. Some are used as anesthetics or hypnotics. However, the class is best known for their use as a coolant or antifreeze.
Derivatives of ethylene, a simple organic gas of biological origin with many industrial and biological use.
Agents counteracting or neutralizing the action of POISONS.
Drugs used to treat or prevent skin disorders or for the routine care of skin.
The valve between the left ventricle and the ascending aorta which prevents backflow into the left ventricle.
The valve between the left atrium and left ventricle of the heart.
Pathological conditions involving any of the various HEART VALVES and the associated structures (PAPILLARY MUSCLES and CHORDAE TENDINEAE).
Gated, ion-selective glycoproteins that traverse membranes. The stimulus for ION CHANNEL GATING can be due to a variety of stimuli such as LIGANDS, a TRANSMEMBRANE POTENTIAL DIFFERENCE, mechanical deformation or through INTRACELLULAR SIGNALING PEPTIDES AND PROTEINS.
A pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.
Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed)
An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.
Those individuals engaged in research.
Financial support of research activities.
Research that involves the application of the natural sciences, especially biology and physiology, to medicine.
A phenomenon in which the surface of a liquid where it contacts a solid is elevated or depressed, because of the relative attraction of the molecules of the liquid for each other and for those of the solid. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

Separation of urea, uric acid, creatine, and creatinine by micellar electrokinetic capillary chromatography with sodium cholate. (1/66)

The capillary electrophoretic separation of the four nonprotein nitrogenous compounds (NPNs; urea, uric acid, creatine, and creatinine) typically employed in clinical and medical settings for the monitoring of renal function is described. Successful resolution of these compounds is achieved with the use of a bile salt micelle system composed of sodium cholate at phosphate buffer pH 7.4. The elution patterns of four NPNs are obtained within 30 min with a voltage of 30 kV. The effect of varying the applied voltage, temperature, and the mole ratio of phosphate buffer with bile salt surfactant on the migration behavior is also examined.  (+info)

Quantification of riboflavin, flavin mononucleotide, and flavin adenine dinucleotide in human plasma by capillary electrophoresis and laser-induced fluorescence detection. (2/66)

BACKGROUND: Riboflavin is the precursor of flavin mononucleotide (FMN) and FAD, which serve as cofactors for several redox enzymes. We have developed a capillary electrophoresis method for the determination of riboflavin and its two coenzyme forms in human plasma. METHODS: Trichloroacetic acid-treated plasma was subjected to solid-phase extraction on reversed-phase columns. The analytes were separated by micellar electrokinetic capillary chromatography in uncoated fused- silica capillaries filled with borate buffer containing 50 mmol/L sodium dodecyl sulfate, methanol, and N-methylformamide. Native fluorescence was monitored at 530 nm, using an argon laser operating at 488 nm as excitation source. RESULTS: The assay was linear over a concentration range of two orders of magnitude, and the limit of detection was far below physiological concentrations for all vitamers. The within-day and between-day coefficients of variation were 4-9% and 6-12%, respectively. The reference values (median, 5-95 percentiles) obtained by analyzing plasma from 63 healthy subjects were 8.6 nmol/L (2.7-42.5 nmol/L) for riboflavin, 7.0 nmol/L (3.5-13.3 nmol/L) for FMN, and 57.9 nmol/L (44.5-78.1 nmol/L) for FAD. CONCLUSIONS: Capillary electrophoresis with laser-induced fluorescence detection allows determination of all riboflavin vitamers far below physiological concentrations. The method may become a useful tool for the assessment of riboflavin status in humans.  (+info)

Simultaneous determination of sweeteners and preservatives in preserved fruits by micellar electrokinetic capillary chromatography. (3/66)

A micellar electrokinetic capillary method for the simultaneous determination of the sweeteners dulcin, aspartame, saccharin, and acesulfame-K and the preservatives sorbic acid; benzoic acid; sodium dehydroacetate; and methyl-, ethyl-, propyl-, isopropyl-, butyl-, and isobutyl-p-hydroxybenzoate in preserved fruits is developed. These additives are ion-paired and extracted using sonication followed by solid-phase extraction from the sample. Separation is achieved using a 57-cm fused-silica capillary with a buffer comprised of 0.05 M sodium deoxycholate, 0.02 M borate-phosphate buffer (pH 8.6), and 5% acetonitrile, and the wavelength for detection is 214 nm. The average recovery rate for all sweeteners and preservatives is approximately 90% with good reproducibility, and the detection limits range from 10 to 25 microg/g. Fifty preserved fruit samples are analyzed for the content of sweeteners and preservatives. The sweeteners found in 28 samples was aspartame (0.17-11.59 g/kg) or saccharin (0.09-5.64 g/kg). Benzoic acid (0.02-1.72 g/kg) and sorbic acid (0.27-1.15 g/kg) were found as preservatives in 29 samples.  (+info)

Analysis of human ouabainlike compound by micellar electrokinetic chromatography. (4/66)

In this preliminary study we have optimised micellar electrokinetic chromatography (MEKC, a form of capillary electrophoresis) to enable the chromatographic and spectral characteristics of human ouabainlike compound (OLC) to be investigated. Sera from fifty patients were combined to form a pool (100 ml) whilst urine (92.5 ml) was obtained from a normal healthy volunteer. Both samples were initially concentrated and partially purified by solid phase extraction before further purification by sequential HPLC separations. Final volumes for both extracts were 100 microl. MEKC was performed on a HP(3D) CE instrument with voltage set at 20 KV, capillary temperature at 20 degrees C, injection time 4 s, sample volume 10 nl, with detection by photodiode array. A compound was found in both serum and urine that had similar elution and spectral characteristics to authentic ouabain. We conclude that MEKC is potentially a useful tool for the analysis of human OLC.  (+info)

Correlation of the capacity factor in vesicular electrokinetic chromatography with the octanol:water partition coefficient for charged and neutral analytes. (5/66)

PURPOSE: The aim of this study was to develop a method based upon electrokinetic chromatography (EKC) using oppositely charged surfactant vesicles as a buffer modifier to estimate hydrophobicity (log P) for a range of neutral and charged compounds. METHODS: Vesicles were formed from cetyltrimethylammonium bromide (CTAB) and sodium n-octyl sulfate (SOS). The size and polydispersity of the vesicles were characterized by electron microscopy, dynamic light scattering, and pulsed-field gradient NMR (PFG-NMR). PFG-NMR was also used to determine if ion-pairing between cationic analytes and free SOS monomer occurred. The CTAB/SOS vesicles were used as a buffer modifier in capillary electrophoresis (CE). The capacity factor (log k') was calculated by determining the mobility of the analytes both in the presence and absence of vesicles. Log k' was determined for 29 neutral and charged analytes. RESULTS; There was a linear relationship between the log of capacity factor (log k') and octanol/water partition coefficient (log P) for both neutral and basic species at pH 6.0, 7.3, and 10.2. This indicated that interaction between the cation and vesicle was dominated by hydrophobic forces. At pH 4.3, the log k' values for the least hydrophobic basic analytes were higher than expected, indicating that electrostatic attraction as well as hydrophobic forces contributed to the overall interaction between the cation and vesicle. Anionic compounds could not be evaluated using this system. CONCLUSION: Vesicular electrokinetic chromatography (VEKC) using surfactant vesicles as buffer modifiers is a promising method for the estimation of hydrophobicity.  (+info)

Separation of sympathomimetic amines of abuse and related compounds by micellar electrokinetic chromatography. (6/66)

Separation of twelve sympathomimetic amines and related compounds by micellar electrokinetic chromatography (MEKC) with UV absorbance detection is described. These amines were well separated within 25 min using 50 mM sodium tetraborate solution containing 15 mM sodium dodecylsulfate (SDS) of pH 9.3 as a running solution and detected at 210 nm. MEKC was performed with an applied voltage of 13 kV at 25 degrees C using a fused-silica capillary (50 cm x 75 mm i.d.) with effective length of 37.5 cm. The detection limits of these compounds were in the range from 4 to 97 fmol/injection at a signal-to-noise ratio (S/N) of 3. The reproducibility of the method expressed as relative standard deviation (RSD) for within-day (n=6) and between-day (n=5) assays was less than 4.8 and 8.8%, respectively. The proposed method could be applied to the determination of an anorectic drug, phentermine, in Chinese tea with a detection limit of 99 microg/g (105 fmol/injection, S/N=3).  (+info)

Evaluation of variation of acteoside and three major flavonoids in wild and cultivated Scutellaria baicalensis roots by micellar electrokinetic chromatography. (7/66)

Micellar electrokinetic chromatography (MEKC) conditions were developed to analyze the constituents of Scutellariae Radix (SR) and Scutellaria baicalensis roots. Using the MEKC method, the major flavonoid constituents of baicalin, baicalein and wogonin of wild and cultivated S. baicalensis roots were compared. In a preliminary comparison of electropherogram, one special peak was found in a wild sample but not in a 2-year-cultivated one. The compound corresponding to the peak was isolated and identified as a phenylethanoid glycoside, acteoside, by comparing the 1H- and 13C-NMR spectral data with that of the authentic compound. This is the first time acteoside has been isolated from the Scutellaria genus. It could only be found in SR derived from wild S. baicalensis roots and 4-year-cultivated plants, but not in plant materials cultivated for 3 years. Applying the MEKC method established in this study, rapid and simultaneous determinations of acteoside together with 3 flavonoids in samples were achieved. The method can thus be used for the quality control of SR in a shorter analysis period than HPLC.  (+info)

Analysis method of the angiotensin-I converting enzyme inhibitory activity based on micellar electrokinetic chromatography. (8/66)

A micellar electrokinetic chromatography (MEKC) method was developed for estimating the angiotensin-I converting enzyme (ACE) inhibitory activity by separating the hippuric acid liberated in the ACE reaction mixture in the presence of an inhibitor, captopril. The hippuric acid was successfully separated and detected by MEKC with a 25 mM sodium dodecyl sulfate solution in a 25 mM phosphate-50 mM borate buffer at pH 7.0; the total analysis took about 5 min. A good linear relationship was observed between the inhibitor and the peak area of hippuric acid release. No significant difference in the ACE inhibitory activity (IC50) of captopril (an antihypertensive medicine) or autolyzed-mushrooms (functional foods) was observed between the conventional method and the MEKC method. The MEKC method was found to be a useful technique for a rapid assay of the ACE inhibitory activity.  (+info)

Abstract Capillary electrophoresis was applied to the analysis of a mixture of triazine herbicides of environmental interest. Micellar electrokinetic capillary chromatography (MECC) proved to be satisfactory for the separation of triazines, providing high efficiency in short analysis times. Several...
A system for interfacing electrochemical detection with micellar electrokinetic capillary chromatography is demonstrated. This system couples the separation column to a short length of the same column material together with a section of porous graphite tubing which forms an electrically conductive joint. The joint is immersed in a buffer reservoir together with the ground electrode of the high-power source (15 kV). The reservoir is electrically insulated from the electrochemical cell containing the carbon fibre detector. This configuration effectively separates the detector from the high separation potential applied. Amperometric detection with micellar solutions is demonstrated for a mixture of B6 vitamers on a 50 μm I.D. column. A detection limit of ca. 4 fmol is obtained. The linear dynamic range of the calibration plot is slightly over two orders of magnitude (from ca. 1 to 200 ppm). © 1991 ...
Micellar electrokinetic chromatography (MEKC), is a chromatography technique, used in analytical chemistry. It is a modification of capillary electrophoresis (CE), where the samples are separated by differential partitioning between micelles (pseudo-stationary phase) and a surrounding aqueous buffer solution (mobile phase). The basic set-up and detection methods used for MEKC are the same as those used in CE. The difference is that the solution contains a surfactant at a concentration that is greater than the critical micelle concentration (CMC). Above this concentration, surfactant monomers are in equilibrium with micelles. In most applications, MEKC is performed in open capillaries under alkaline conditions to generate a strong electroosmotic flow. Sodium dodecyl sulfate (SDS) is the most commonly used surfactant in MEKC applications. The anionic character of the sulfate groups of SDS cause the surfactant and micelles to have electrophoretic mobility that is counter to the direction of the ...
The research presented in this dissertation involves the synthesis, modification, characterization, and the application of polymeric surfactants in micellar electrokinetic chromatography (MEKC). Sodium undecenoyl-L-Leucinate (L-SUL) was synthesized and modified by use of alkali metal counterions, alcohols, and Triton X-102. Characterization of the modified poly-L-SUL was performed in order to elucidate the structural changes on the surfactants by use of four techniques. While surface tensiometry was used for the determination of the critical micelle concentration (cmc), fluorescence measurements were used for the determination of the polarity of the modified polymeric surfactants. The information about the size of the polymeric surfactants was obtained by use of pulsed field gradient-NMR (PFG-NMR). A superior chromatographic performance in MEKC was demonstrated by the modified polymeric surfactants as compared to the non-modified polymeric surfactants. A correlation between the polarity and the ...
A cyclodextrin-modified micellar electrokinetic chromatography (CD-MEKC) technique has been developed for enantioseparation of vinpocetine using an inexpensive 2-hydroxypropyl-β-CD (HP-β-CD) as the chiral selector (CS). The best chiral separation was achieved using 40 mM HP-β-CD as the CS in 50 mM phosphate buffer (pH 7.0) consisting of 40 mM sodium dodecyl sulfate (SDS) at a separation temperature and separation voltage of 25°C and 25 kV, respectively. To the authors best knowledge, this is the first CD-MEKC study able to successfully separate the four stereoisomer of vinpocetine in separation time of 9.5 min and resolution of 1.04-3.87. Chirality, 2012. © 2012 Wiley Periodicals, Inc. ...
Capillary zone electrophoresis and micellar electrokinetic chromatography, with taurodeoxycholate as micellar agent, of protein kinase A peptide substrates ...
Ge, L., Tan, S.N., Yong, J.W.H., Hua, L., Ong, E.S. (2008). Separation of cytokinin isomers with a partial filling-micellar electrokinetic chromatography-mass spectrometry approach. Electrophoresis 29 (10) : 2024-2032. [email protected] Repository. https://doi.org/10.1002/elps. ...
Journal of Analytical Methods in Chemistry is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles reporting methods and instrumentation in chemical analysis, and their application to real-world problems.
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Capillary electrokinetic chromatography is generally recognized as a versatile and robust capillary electromigration technique for the separation of enantiomers. In this mode, one or more chiral selectors are added to the background electrolyte acting as pseudostationary phases. Within the various chiral selectors that have been applied to enantioseparations in capillary electrokinetic chromatography, cyclodextrins are by far the most often used selectors because of their versatility, structural variety and commercial availability. This is reflected in the large number of applications of cyclodextrins to analytical enantioseparations that have been reported between January 2012 and July 2016, the period of time covered by this review. Many of these applications cover aspects of life sciences such as drug analysis, bioanalysis or food analysis. Despite the large number of commercially available cyclodextrins, new derivatives have been developed in order to achieve altered enantioselectivities or ...
The use of auxiliary separation mechanisms to manipulate the separation selectivity of metal complexes and organometallic species is reviewed. Auxiliary separation mechanisms included in the review are micellar electrokinetic capillary chromatography, ion-pairing and ion-exchange electrokinetic chromatography. This paper discusses how these secondary mechanisms can be effectively employed to tailor separation selectivity.. ...
Studies of the capillary zone electrophoresis (CZE) and micellar electrokinetic capillary chromatography (MEKC) behaviour of 1,4-benzodiazepines have seen application in subject areas such as the development of pharmaceuticals, therapeutic drug monitoring and forensic toxicology. In the development of pharmaceuticals, pK(a) determinations by CZE can be used in preclinical studies whereas analytical data on the detection and determination of 1,4-benzodiazepines is of value primarily in raw material/formulation assay and in the analysis of body fluids in clinical studies. The capillary electrophoresis (CE) techniques, which generally have inferior limits of detection (LOD) to rival techniques such as gas chromatography (GC) and high-performance liquid chromatography (HPLC), are particularly applicable in forensic toxicology where reasonably high concentrations of these drugs can be encountered. It is anticipated that, with the interfacing of CZE: and capillary electrochromatography (CEC) with mass ...
TY - JOUR. T1 - COMPARISON OF DIFFERENT TECHNIQUES FOR THE ANALYSIS OF METALLOTHIONEIN ISOFORMS BY CAPILLARY ELECTROPHORESIS. AU - RICHARDS, M P AU - BEATTIE, J H PY - 1995/7/7. Y1 - 1995/7/7. N2 - We have investigated free-solution capillary electrophoresis (FSCE) and micellar electrokinetic capillary chromatography (MECC) separations of metallothionein (MT) isoforms conducted in uncoated and surface-modified fused-silica capillaries. At alkaline pH, FSCE rapidly resolves isoforms belonging to the MT-1 and MT-2 charge classes. At acidic pH, additional resolution of MT isoforms is achieved. The use of high-ionic-strength (0.5 M) phosphate buffers can result in high peak efficiencies and increased resolution for some MT isoforms. Interior capillary surface coatings such as polyamine and linear polyacrylamide polymers permit separation of MT isoforms with enhanced resolution through their effects on electroosmotic flow (EOF) and protein-wall interactions. Improvements in MT isoform resolution can ...
Capillary electrophoresis (CE) comprises a family of related separation techniques in which an electric field is used to achieve the separation of components in a mixture. One of the key features of CE is the simplicity of the instrumentation required, and today, these techniques have become powerful analytical tools for high efficiency separation, and the identification of a variety of ionic and neutral compounds.. Moreover, the versatility of CE operational modes (capillary zone electrophoresis, micellar electrokinetic capillary chromatography, capillary electrochromatography, capillary isoelectric focusing, isotachophoresis, non-aqueous capillary electrophoresis, etc.) and detection systems (ultraviolet, fluorescence, amperometric, mass spectrometry…) make CE useful for applications in many fields such as environmental, food, pharmaceutical, and forensic analysis. The typcial drawback of CE techniques, based on their low sensitivity when dealing with conventional UV-detection, due to their ...
In order to adopt a general workflow for complex biological matrices with respect to a new blood-brain barrier (BBB) model, a micellar electrokinetic chromatography method has been developed. The cells forming the BBB have been cultivated in a special cell growth medium in which six drugs (acetaminophen, caffeine, carbamazepine, cimetidine, indometacin and propranolol) have been dissolved and tested for their penetration properties. The results showed good to very good accordance to the reference values. Samples were directly injected onto the capillary without any pretreatment (fused silica capillary, id: 50 μm, L: 48 cm, l: 40 cm). After method development, separations were carried out using a 60 mM borate buffer containing 200 mM of SDS at 30 kV, leading to an analysis time of less than 10 min. Between two runs the capillary was rinsed with a mixture of equal parts of running buffer and isopropanol (70% v/v), which proved to be very effective to remove matrix compounds. An appropriate choice ...
SIMON, Brigitta; HANCU, Gabriel and GYERESI, Árpád. Application of capillary electrophoresis to the simultaneous determination and stability study of four extensively used penicillin derivatives. Braz. J. Pharm. Sci. [online]. 2014, vol.50, n.3, pp.521-527. ISSN 1984-8250. http://dx.doi.org/10.1590/S1984-82502014000300010.. The applicability of capillary electrophoresis for the analysis of four extensively used penicillin derivatives (benzylpenicillin, ampicillin, amoxicillin, oxacilllin) has been studied. Because of structural similarities, the electrophoretic behavior of these derivatives is very similar; consequently an efficient separation using the conventional capillary zone electrophoresis is hard to be achieved. Their simultaneous separation was solved by using micellar electrokinetic capillary chromatography, the separation being based on the differential partition of the analytes between the micellar and aqueous phase. Using a buffer solution containing 25 mM sodium tetraborate and ...
Abstract A method for the determination of histamine, 2-phenylethylamine, tryptamine, putrescine, cadaverine, spermidine and spermine in fish using micellar electrokinetic capillary chromatography (MECC) was developed. Seven biogenic amines (BAs) were extracted from a sample with 6% perchloric acid, then derivatized with benzoyl chloride. 0.02 mol/L borate buffer (pH 9.2) containing 0.06 mol/L sodium deoxycholate-methanol (95∶5, v/v)was used as a running buffer. The detection wavelength was set at 214 nm. The separation was achieved within 12 min. Good linearities were observed from the calibration plots in the concentration ranges. The detection limit of histamine was 15 μg/g and those of the other amines were 5 μg/g. The developed method was successfully employed for the simultaneous determination of 7 BAs in fish sample with satisfactory results. ...
A method for simultaneous determination of polyamines and catecholamines in cell extracts by micellar electrokinetic capillary chromatography with UV detection at 254 nm was established at the first time. The polyamines (putrescine, spermidine and spermine) and catecholamines (dopamine, serotonin, norepinephrine and epinephrine) were extracted from PC-12 cells and were derivatized with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate. Different derivatization conditions such as temperature, ratio of derivatization reagents and incubation time were investigated to find the best reaction condition which gave the highest detection sensitivity for polyamines and catecholamines. The influence of running buffer and additives on the separation such as pH, sodium dodecyl sulfate (SDS) concentrations and various additives was also investigated. Separation was achieved within 20 min with good repeatability in a 100 mM boric acid buffer containing 10 mM SDS and 10 mM 18-crown-6 at a pH of 9.5. The detection limit
Rapid determination of acyclovir in plasma and cerebrospinal fluid by micellar electrokinetic chromatography with direct sample injection. 500 mg acyclovir.Commande En Ligne Valtrex (valacyclovir) 500 Mg and Pharmacie de garde Zovirax (Acyclovir) 200 mg, Valtrex (Valacyclovir) 500 mg Canada, Acyclovir Acheter Sans.Star spare parts common rail diesel injection pump and pump injector, petrol injection and repair kits, diesel fuel filters and bearings, caterpillar, lucas, delphi.. I came to your La Saint Valentin à l hôtel Atrium: Hotel Arles,. Both the Dow andthe S&P_ 500 closed at all-time highs on Friday - for the secondday in a row.buy valacyclovir 500 mg And cold sores pain lower back amoxicillin allergic reaction in baby buy valacyclovir 500 mg does have shelf life. Is still available dose.Cialis in pakistan price, The cost of cialis and viagra. Purchase acyclovir online! Trazodone online purchase? Kamagra uk prices, Nexium overnight!.Stability of cidofovir in 0.9% sodium chloride and in ...
A double-injection micellar electrokinetic chromatography (DIMEKC) method for the identification of Æ - caprolactam and melamine deliberately added to povidone (polyvin..
A methodology for the determination of tomato phenolic acids and flavonoids has been developed combining MEKC and DAD detection. The influence on polyphenol separation of pH and background electrolyte, BGE (borax, acetonitrile, methanol and SDS concentrations), was studied and optimized using response surface methodology and weighted desirability function. Separation of polyphenols was achieved within 20 min at 15 °C using 11.3 mM borax and 11.2 mM SDS adjusted to pH 8.5 as BGE. Validation was performed using standards and tomato extracts. Recoveries ranged from 77 to 106%. Acceptable repeatabilities were obtained for peak area (%RSD ,3.1% and ,3.7%) and migration times (%RSD ,0.2% and ,1.4%) for intra- and inter-day respectively. Detection limits ranged between 0.8 and 3.8 mg kg−1. Five and seven of these polyphenols were determined in samples of tomato and related species. This methodology will be valuable tool in breeding programs, analyzing a large number of samples. [-] ...
A capacitively coupled contactless conductivity detection (CCD) system has been applied for the detection of neutral synthetic polymers in capillary size-exclusion electrokinetic chromatography (SEEC). Polystyrene standards, that were used as a model compounds, were separated on a capillary column packed with porous 10 μm silica particles with an electrokinetically driven mobile phase, and detected by CCD and UV detection simultaneously. Mass-calibration curves for polystyrene were constructed. Satisfactory results were obtained for the linearity, the run-to-run repeatability (,0.2% for the relative retention and ,4% for the peak area) and the robustness of the detector. One of the major issues in this preliminary study was to investigate the origin of the peaks observed for the polystyrene standards. The effect of the molar mass of the polystyrenes on the sensitivity was small. Therefore, the signals obtained could not be explained as the result of an increased viscosity and a decreased ...
A field-amplified sample injection-micellar electrokinetic chromatography (FASI-MEKC) method for the determination of 14 benzophenones (BPs) in a food simulant used in migration studies of food packaging materials was developed, allowing almost baseline separation in less than 21 min. The use of a 10 mM sodium dodecyl sulfate (SDS) solution as sample matrix was mandatory to achieve FASI enhancement of the analyzed BPs. A 21- to 784-fold sensitivity enhancement was achieved with FASI-MEKC, obtaining limits of detection down to 5.1-68.4 µg/L, with acceptable run-to-run precisions (RSD values lower than 22.3%) and accuracy (relative errors lower than 21.0%). Method performance was evaluated by quantifying BPs in the food simulant spiked at 500 µg/L (bellow the established specific migration limit for BP (600 µg/L) by EU legislation). For a 95% confidence level, no statistical differences were observed between found and spiked concentrations (probability at the confidence level, p value, of 0.55),
Partial filling-micellar electrokinetic chromatography optimizationstudies of ibuprofen, codeine and degradation products, and coupling tomass spectrometry: Part II. ...
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Zhan, Q., Gusev, A., & Hercules, D. M. (1999). A novel interface for on-line coupling of liquid capillary chromatography with matrix-assisted laser desorption/ionization detection. Rapid Communications in Mass Spectrometry, 13(22), 2278-2283 ...
Catechins (catechin and other derivatives) are naturally occurring flavonoids present in a number of plants and foods. They are also part of numerous nutraceutical formulations because they are believed to have antioxidant, cancer chemo-preventative, anti-inflammatory and antimicrobial properties. The determ
Determination of caffeine and associated compounds in food, beverages, natural products, pharmaceuticals, and cosmetics by micellar electrokinetic capillary ...
The arrangement of the glucose units in the three different forms of cyclodextrin are shown in figure 26. The mouth of the torus-shaped cyclodextrin molecule has a larger circumference than at the base and is linked to secondary hydroxyl groups of the C2 and C3 atoms of each glucose unit (see figure 27). The primary hydroxyl groups are located at the base of the torus on the C6 atoms. As these hydroxyl groups are free to rotate, they partially block the base aperture. The size of the cavity increases with increasing number of glucose units (figure 26).The secondary hydroxyl groups can be reacted with appropriate reagents to introduce additional and different interactive character to the cyclodextrin molecule. The strong chiral selectivity of the cyclodextrins structures is thought to arise from the many chiral centers they contain (e.g., b-cyclodextrin has 35 stereogenic centers). The cyclodextrins are probably the most effective chirally selective stationary phases presently available for the ...
It is clear that the column radius is the critical property of the system, significantly effecting both the column efficiency and the analysis time. It is also seen that the contribution to dispersion from longitudinal diffusion is the same for both columns and so the striking difference between the performance of the two columns depends solely on the effect of the column radius on the resistance to mass transfer terms. This is clearly illustrated by the large difference in slopes of the two linear curves for the resistance to mass transfer shown in figure 17.. ...
Founded by a researcher, ChromatographyParts.com is dedicated to the goal of lowering the cost of scientific research by providing high-quality replacement parts for Gas Chromatography and HPLC systems at bargain prices.. ChromatographyParts.com is a part of ConquerScientific.com, where we offer new and used systems, as well as on-site repair and installation services for HPLC and GC systems. Get in touch with us today! ...
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Liposome and micelle electrokinetic chromatography (EKC) were used to determine retention factors (k) that are directly related to partition coefficients (K) and the phase ratio (φ) as: k = K*φ. Linear solvation energy relationship (LSER) models were used to elucidate the contributions of solute partitioning into liposomes. In addition, an LSER model for both MEKC and LEKC was used to determine partition coefficients for solutes without observed partition coefficients. The observed partition coefficients and those determined from LSER were then used to predict partition coefficients with the group contribution approach (GCA) and the fragmental constant approach (FCA) from solute structure. In the GCA, a relatively small number of key monosubstituted aromatic and aliphatic solutes are used to determine the substituent constants of functional groups. These substituent constants as well as the contributions from aromatic and aliphatic carbon plus hydrogen are used to predict partition ...
Berezkin, V.G.; Popova, T.P.; Shiryayeva, V.Ye.; Nomura, N., Gas-chromatographic separation of monoalkylphenols on polar and non-polar phases by means of capillary chromatography, Pet. Chem. USSR (Engl. Transl.), 1997, 37, 2, 161-167. 16 matching species were found. For each matching species the following will be displayed: ...
Polyprotic molecular weight = 1003.19 for mass spectrometry analysis • Near-infrared (NIR) fluorescent dye • Solubility: Water or DMSO • Carboxylic acid available for covalent attachment • Supplied as polysodium salt • Used as a contrast agent by itself or for making optical probes for NIR fluorescence imaging. ...
How is the column strength affected by its slenderness?. The column slenderness is defined in terms of its slenderness ratio kLu/r, where the term kLu is called the effective length and the factor k modifies the actual column length to account for end restraints other than pinned. The value of the effective length factor k varies between 0.5 and 2.0, depending of the buckled shape of the column for different end conditions. The parameter r is the radius of gyration of the cross section.. In practice, columns are rarely found as isolated members, but they are part of rigid frames together with other structural members such as beams. When the frame is laterally braced, the joint translation is prevented by shear walls, attachment to adjoining structures, etc, and such a column is called Non-sway, as opposed to a Sway column, where the lateral stability is dependent of the stiffness of the members of the frame.. When a slender column is axially loaded, it tends to buckle, which creates a deflection ...
How is the column strength affected by its slenderness?. The column slenderness is defined in terms of its slenderness ratio kLu/r, where the term kLu is called the effective length and the factor k modifies the actual column length to account for end restraints other than pinned. The value of the effective length factor k varies between 0.5 and 2.0, depending of the buckled shape of the column for different end conditions. The parameter r is the radius of gyration of the cross section.. In practice, columns are rarely found as isolated members, but they are part of rigid frames together with other structural members such as beams. When the frame is laterally braced, the joint translation is prevented by shear walls, attachment to adjoining structures, etc, and such a column is called Non-sway, as opposed to a Sway column, where the lateral stability is dependent of the stiffness of the members of the frame.. When a slender column is axially loaded, it tends to buckle, which creates a deflection ...
Capillary electrophoresis (CE) is a family of electrokinetic separation methods performed in submillimeter diameter capillaries and in micro- and nanofluidic channels. Very often, CE refers to capillary zone electrophoresis (CZE), but other electrophoretic techniques including capillary gel electrophoresis (CGE), capillary isoelectric focusing (CIEF), capillary isotachophoresis and micellar electrokinetic chromatography (MEKC) belong also to this class of methods. In CE methods, analytes migrate through electrolyte solutions under the influence of an electric field. Analytes can be separated according to ionic mobility and/or partitioning into an alternate phase via non-covalent interactions. Additionally, analytes may be concentrated or focused by means of gradients in conductivity and pH. The instrumentation needed to perform capillary electrophoresis is relatively simple. A basic schematic of a capillary electrophoresis system is shown in figure 1. The systems main components are a sample ...
Detection of drugs at low concentration is required in a variety of biological and medical situations, in order to avoid harmful side effects posed by some drug residues. The book details the instrumentation, detection, and application of nano chromatography (that is, any chromatographic and capillary electrophoretic method dealing with the detection of a sample at nano gram per liter or lower) and capillary electrophoresis in the analyses of biological and environmental samples. Methods discussed include: Nano Gas Chromatography, Nano Capillary Electrophoresis, Nano Chiral Chromatography, Micellar Electrokinetic Chromatography, Supercritical Fluid Chromatography, and Nano High Performance Liquid Chromatography.. ...
This graph shows the total number of publications written about Capillary Electrochromatography by people in this website by year, and whether Capillary Electrochromatography was a major or minor topic of these publications ...
The separation of different ring numbered polyaromatic hydrocarbons (PAHs) was accomplished by using cetyltrimethylammonium bromide (CTAB) in capillary electrokinetic chromatography. In order to increase the solubilities and selectivities of PAHs, acetonitrile (ACN) was used as an organic modifier. Under the optimised conditions, 11 aromatic compounds were separated within 14.5 min in a running electrolyte containing 10 mM phosphate, 30 mM CTAB, and 40% ACN at pH 6.0. The effects of CTAB and ACN concentrations, voltage and pH on the resolution were investigated. Reproducibilities of migration times range between 0.55 and 1.27 R.S.D.% and peak areas between 1.02 and 7.23 R.S.D.%. Limit of detections (LODs) range between 0.09 and 2.24 mu g ml(-1). This new and fast separation method of PAHs was applied to cooked oil sample. (c) 2005 Elsevier B.V. All rights reserved. ...
Nanoparticles were used as a pseudostationary phase in capillary electrochromatography (CEC) electrospray ionisation-mass spectrometry (ESI-MS) for separation of both neutral analytes by a reversed phase mechanism, as well as for cationic analytes by a cation exchange mechanism. Nanoparticles suspended in electrolyte, were injected as a plug prior to the sample using a partial filling technique (PF), or used as electrolyte in a continuous full filling (CFF) technique. An orthogonal ESI probe was used to hinder the nanoparticles from entering the mass spectrometer and to allow detection of analytes co-eluting with concentrated nanoparticle slurries. Two types of nanoparticles were synthesised and used, both of them having a hydrophobic core and a hydrophilic surface. The hydrophobic core gave the nanoparticles reversed phase properties and the hydrophilic surface promoted the formation of stable slurries of nanoparticles in electrolytes with a low concentration of organic modifier. The surface of ...
TY - JOUR. T1 - Polyethylenimine-modified metal oxides for fabrication of packed capillary columns for capillary electrochromatography and capillary liquid chromatography. AU - Wiedmer, Susanne K.. AU - DOrazio, Giovanni. AU - Smått, Jan-Henrik. AU - Bourdin, Delphine. AU - Baños-Pérez, Clara. AU - Sakeye, Motolani. AU - Kivilompolo, Maarit. AU - Kopperi, Matias. AU - Ruiz-Jiménez, José. AU - Fanali, Salvatore. AU - Riekkola, Marja-Liisa. PY - 2011. Y1 - 2011. U2 - 10.1016/j.chroma.2010.12.071. DO - 10.1016/j.chroma.2010.12.071. M3 - Artikel. VL - 1218. SP - 5020. EP - 5029. JO - Journal of Chromatography A. JF - Journal of Chromatography A. SN - 0021-9673. IS - 30. ER - ...
Enantioseparation has attracted considerable attention in biological science and pharmaceutical industry because of the different physiological activity and pharmacological effects of different enantiomers (1). Amongst many analytical techniques, capillary electrophoresis (CE) is a relatively new separation technique that provides rapid analysis with high efficiency and resolution due to the use of electric field and a variety of selective modes (2). Cyclodextrins are the most commonly utilized chiral selectors added into the background electrolyte to perform enantioseparation. Besides neutral CDs derivatives, the synthesis and application of charged CDs derivatives have become attractive due to their good water solubility and excellent enantiorecognition abilities towards counter-charged racemic analytes (3,4). Previously, our group has developed a series of positive changed single isomer CD selectors which afforded good enantioseparation abilities to anionic and ampholytic acids by CE (5,6,7). ...
High-speed capillary electrochromatography was developed on both short and long packed columns with 2 mu m non-porous ODS as the stationary phase. Factors that affect the analysis time of samples, such as voltage, electrolyte concentration, pH and organic modifier concentration in the mobile phase, were studied systematically. Fast analysis of aromatic compounds within 13 seconds was realized with column efficiency of 573,000 plates/m and a R.S.D.% of the retention times of all components in 8 consecutive injections below 1.0%. which demonstrated the high efficiency and high reproducibility of such a technique. In addition, DNPH derived aldehydes and ketones in both standards and environmental samples were separated with high speed ...
article{350485, author = {Lynen, Frederic and BUICA, A and De Villiers, Andr{\e} and CROUCH, A and Sandra, Patrick}, issn = {1615-9306}, journal = {JOURNAL OF SEPARATION SCIENCE}, language = {eng}, number = {13}, pages = {1539--1549}, publisher = {WILEY-V C H VERLAG GMBH}, title = {An efficient slurry packing procedure for the preparation of columns applicable in capillary electrochromatography and capillary electrochromatography-electrospray-mass spectrometry}, volume = {28}, year = {2005 ...
On-Column Ion-Exchange Preconcentration of Inorganic Anions in Open Tubular Capillary Electrochromatography with Elution Using Transient-Isotachophoretic Gradients. 3. Implementation and Method Development
Characterization of nanocrystals is crucial for the development of many chemical methods based on this technology. For this, there are several techniques, mainly microscopic, and recently capillary electrophoretic techniques, that have been proposed. In our laboratory, we examined several capillary electrophoretic methodologies: zone (CZE), micellar (MEKC), microemulsion (MEEKC), non-aqueous (NACE) and polymer based (CGE). For the separation of water soluble CdSe nanocrystals, CZE, MEKC and CGE were found to be suitable
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Expanding on Jonts explanation, the frequency of vibration is strictly proportional to the speed of sound and inversely proportional to the pipes effective length (f = c/(2*Leff)). The speed of sound depends on the properties of the gas contained in the pipe and the temperature of the gas: c = const*sqrt(T(kelvin)) = const*sqrt(273+T(celsius)) For dry air, const = 20.1, so at 20 degrees celsius c = 20.1*sqrt(273 + 20) = 344 m/s A useful approximation good for a range of temperatures around zero degrees C is c = 331.3 + 0.6*T(celsius) If the pipe were cold, at say 50 degrees F (10 degrees C), the frequency would be 337.3, according to this formula. (338.1 using the more accurate sqrt formula) When warmed to a room temperature of 20 degrees C we are back to 344 m/s. So this is an increase of about 1.8% or about 3 tenths of a semi-tone (which is approx. 5.9%). You can calculate the pitch change in cents using the formula cents_change = 3986.3*log10(f2/f1) = 3986.3*log10(sqrt((273 + Tc2)/(273 + ...
Metal tubeless tire valve stem fits all cast wheels with .327in.-.339in. holes Full-length threading for various rim thicknesses Comes with metal cap, lock nut and O-ring seal 1 3/16in. effective length
Capillary electrochromatography. Ion chromatography. Micellar electrokinetic chromatography. Paper chromatography. Reversed- ... Affinity chromatography. Column chromatography. Displacement chromatography. Electrochromatography. Gas chromatography. High- ... phase chromatography. Size-exclusion chromatography. Thin-layer chromatography. Two-dimensional chromatography. Van Deemter ...
High-performance liquid chromatography. *Capillary electrochromatography. *Ion chromatography. *Micellar electrokinetic ... Size exclusion chromatography. Micellar liquid chromatography. Ion chromatography (or ion-exchange chromatography) separates ... Anion exchange chromatography retains anions using positively charged functional group: R-X. +. A. −. +. M. +. B. −. ⇄. R-X. + ... or in chromatography columns. Thin layer chromatography or column chromatography share similarities in that they both act ...
High-performance liquid chromatography. *Capillary electrochromatography. *Ion chromatography. *Micellar electrokinetic ... Micellar liquid chromatography. Ion chromatography (or ion-exchange chromatography) is a chromatography process that separates ... High performance liquid chromatography. Aqueous Normal Phase Chromatography. Size exclusion chromatography. ... Anion exchange chromatography retains anions using positively charged functional group: R-X. +. A. −. +. M. +. B. −. ⇄. R-X. + ...
High-performance liquid chromatography. *Capillary electrochromatography. *Ion chromatography. *Micellar electrokinetic ... Weak affinity chromatography[edit]. Weak affinity chromatography[28] (WAC) is an affinity chromatography technique for affinity ... Boronate affinity chromatography[edit]. Boronate affinity chromatography consists of using boronic acid or boronates to elute ... Lectin affinity chromatography is a form of affinity chromatography where lectins are used to separate components within the ...
High-performance liquid chromatography. *Capillary electrochromatography. *Ion chromatography. *Micellar electrokinetic ... Thin layer chromatography (TLC)[edit]. Further information: Thin layer chromatography. Thin layer chromatography (TLC) is a ... Gas chromatography[edit]. Further information: Gas chromatography. Gas chromatography (GC), also sometimes known as gas-liquid ... Affinity chromatography[edit]. Further information: Affinity chromatography. Affinity chromatography[14] is based on selective ...
High-performance liquid chromatography. *Capillary electrochromatography. *Ion chromatography. *Micellar electrokinetic ... Gas chromatography-mass spectrometry (GC-MS) is an analytical method that combines the features of gas-chromatography and mass ... Pyrolysis-gas chromatography-mass spectrometry. References[edit]. *^ O. David Sparkman; Zelda Penton; Fulton G. Kitson (17 May ... Niessen, W. M. A. (2001). Current practice of gas chromatography-mass spectrometry. New York, N.Y: Marcel Dekker. ISBN 978-0- ...
High-performance liquid chromatography. *Capillary electrochromatography. *Ion chromatography. *Micellar electrokinetic ... "https://kn.wikipedia.org/w/index.php?title=ಟೆಂಪ್ಲೇಟು:Chromatography&oldid=346414" ಇಂದ ಪಡೆಯಲ್ಪಟ್ಟಿದೆ ...
Capillary zone electrophoresis and micellar electrokinetic chromatography, with taurodeoxycholate as micellar agent, of protein ...
Micellar electrokinetic capillary chromatography of vitamin B6 with electrochemical detection. Journal of Chromatography A 585 ... Micellar electrokinetic capillary chromatography of vitamin B6 with electrochemical detection. Authors: Yik, Y.F.. Lee, H.K. Li ... A system for interfacing electrochemical detection with micellar electrokinetic capillary chromatography is demonstrated. This ... Amperometric detection with micellar solutions is demonstrated for a mixture of B6 vitamers on a 50 μm I.D. column. A detection ...
Micellar electrokinetic capillary chromatography (MECC) proved to be satisfactory for the separation of triazines, providing ... Abstract Capillary electrophoresis was applied to the analysis of a mixture of triazine herbicides of environmental interest. ... Determination of triazine herbicides in water by micellar electrokinetic capillary chromatography Carabias Martí 관련메뉴. ; nez, R ... Micellar electrokinetic capillary chromatography (MECC) proved to be satisfactory for the separation of triazines, providing ...
... , about ". micellar electrokinetic capillary chromatography (MECC); biogenic amines; fish ... Key words: micellar electrokinetic capillary chromatography (MECC) biogenic amines fish Received: 2007-06-12; Published: 2007- ... Determination of Seven Biogenic Amines in Fish Using Micellar Electrokinetic Capillary Chromatography ... Determination of Seven Biogenic Amines in Fish Using Micellar Electrokinetic Capillary Chromatography ...
... and cosmetics by micellar electrokinetic capillary chromatography. dc.creator. Injac, Rade. ... and cosmetics by micellar electrokinetic capillary chromatography. en. ...
... micellar electrokinetic capillary chromatography, capillary electrochromatography, capillary isoelectric focusing, ... Chapter 6. Micellar and Microemulsion Electrokinetic Capillary Chromatography as Surrogate Models for Lipophilicity and ... Keywords: Capillary Electrophoresis, Capillary Electrophoresis-Mass Spectrometry, Food Analysis, Environmental Analysis, ... Capillary Electrophoresis in the Early Twenty-First Century: New Trends and Relevant Applications. Oscar Núñez, PhD and Xavier ...
Ion-exchange electrokinetic capillary chromatography • Ion-pairing • Metal complex • Micellar electrokinetic capillary ... Auxiliary separation mechanisms included in the review are micellar electrokinetic capillary chromatography, ion-pairing and ... ion-exchange electrokinetic chromatography. This paper discusses how these secondary mechanisms can be effectively employed to ... Tailoring the separation selectivity of metal complexes and organometallic compounds resolved by capillary electrophoresis ...
... a micellar electrokinetic chromatography method has been developed. The cells forming the BBB have been cultivated in a special ... Samples were directly injected onto the capillary without any pretreatment (fused silica capillary, id: 50 μm, L: 48 cm, l: 40 ... Between two runs the capillary was rinsed with a mixture of equal parts of running buffer and isopropanol (70% v/v), which ... Next article in issue: Simultaneous determination of nitrite and nitrate in human plasma by on-capillary preconcentration with ...
Their simultaneous separation was solved by using micellar electrokinetic capillary chromatography, the separation being based ... Also, a simple capillary zone electrophoresis method was applied to study the stability of the studied penicillin derivatives ... Keywords : Penicillin/derivatives/stability study; Capillary electrophoresis/drugs analysis. · abstract in Portuguese · text in ... SIMON, Brigitta; HANCU, Gabriel and GYERESI, Árpád. Application of capillary electrophoresis to the simultaneous determination ...
A double-injection micellar electrokinetic chromatography (DIMEKC) method for the identification of Æ - caprolactam and ... A double-injection micellar electrokinetic chromatography (DIMEKC) method for the identification of Ɛ- caprolactam and melamine ... The capillary was cut to the desired length using a SGT Shortix capillary column cutter (Middelburg, The Netherlands). ... The aim of the present study has been to develop a CE method based on double-injection micellar electrokinetic chromatography ...
A method for simultaneous determination of polyamines and catecholamines in cell extracts by micellar electrokinetic capillary ... chromatography with UV detection at 254 nm was established at the first time. The polyamines (putrescine, spermidine and ... Chromatography, Micellar Electrokinetic Capillary; Hydrogen-Ion Concentration; PC12 Cells; Rats; Reproducibility Of Results; ... Micellar Electrokinetic Capillary Chromatography; Polyamines; UV Detection; Amines; 6 Aminoquinolyl N ...
N2 - We have investigated free-solution capillary electrophoresis (FSCE) and micellar electrokinetic capillary chromatography ( ... AB - We have investigated free-solution capillary electrophoresis (FSCE) and micellar electrokinetic capillary chromatography ( ... We have investigated free-solution capillary electrophoresis (FSCE) and micellar electrokinetic capillary chromatography (MECC ... abstract = "We have investigated free-solution capillary electrophoresis (FSCE) and micellar electrokinetic capillary ...
Studies of the capillary zone electrophoresis (CZE) and micellar electrokinetic capillary chromatography (MEKC) behaviour of 1, ... to rival techniques such as gas chromatography (GC) and high-performance liquid chromatography (HPLC), are particularly ... Smyth, Franklin and McClean, Stephen (1998) A critical evaluation of the application of capillary electrophoresis to the ... The capillary electrophoresis (CE) techniques, which generally have inferior limits of detection (LOD) ...
A non-competitive immunoassay based on micellar electrokinetic capillary chromatography (MECC) with laser-induced fluorescence ... A non-competitive immunoassay based on micellar electrokinetic capillary chromatography (MECC) with laser-induced fluorescence ... Non-competitive immunoassay for alpha-fetoprotein using micellar electrokinetic capillary chromatography and laser-induced ... Non-competitive immunoassay for alpha-fetoprotein using micellar electrokinetic capillary chromatography and laser-induced ...
Analysis of pilocarpine and its degradation products by micellar electrokinetic capillary chromatography ... Analysis of pilocarpine and its degradation products by micellar electrokinetic capillary chromatography. ... Analysis of pilocarpine and its degradation products by micellar electrokinetic capillary chromatography. Pharmaceutical ...
Capillary electrophoresis and electrochromatography are performed in channels formed in the substrate. Analytes are loaded into ... micellar electrokinetic capillary chromatography (MECC), inorganic ion analysis, and gradient elution liquid chromatography, as ... Micellar Electrokinetic Capillary Chromatography. In the electrochromatography experiments discussed above with respect to FIG ... 20 shows a chromatogram of coumarins resulting from micellar electrokinetic capillary chromatography using the system of FIG. ...
Practical analysis of alpha acids by liquid chromatography 16.7. Micellar electrokinetic capillary chromatography 16.8. ... Liquid chromatography 18.3. Specific research possibilities for liquid chromatography 18.4. Capillary electrophoresis (CE) 18.5 ... and several on the high-efficiency liquid chromatography of hop bitter acids.. Bearing in mind the lack of literature produced ...
15.6 Capillary Zone Electrophoresis; an Example 221. 15.7 Micellar Electrokinetic Chromatography 222 ... and on electrokinetic separation methods. SPB has published more than 90 papers in international journals, given more than 65 ...
T1 - Use of high-conductivity sample solution with sweeping-micellar electrokinetic capillary chromatography for trace-level ... Use of high-conductivity sample solution with sweeping-micellar electrokinetic capillary chromatography for trace-level ... Use of high-conductivity sample solution with sweeping-micellar electrokinetic capillary chromatography for trace-level ... Use of high-conductivity sample solution with sweeping-micellar electrokinetic capillary chromatography for trace-level ...
Although capillary electrophoresis (CE) technology has evolved quickly from the research laboratory into practical application ... Protein Analysis by Capillary Electrophoresis, J.M. Hempe Micellar Electrokinetic Chromatography, S. Terabe Capillary ... Part IIA Capillary-Based Systems: Core Methods and Technologies Kinetic Capillary Electrophoresis, M.V. Berezovski and S.N. ... Isoelectric Focusing in Capillary Systems, J.W. T. Huang, and J. Pawliszyn Part IIB Capillary-Based Systems: Specialized ...
Micellar electrokinetic chromatography (MEKC) for neutral and=or charged drugs. Microemulsion electrokinetic chromatography ( ... Capillary electrochromatography (CEC) (C.J. Paterson, R.J. Boughtflower). Introduction. Basic principles of capillary ... Application of standard methods in capillary electrophoresis for drug analysis (K. Altria). Introduction to capillary ... Basis and pharmaceutical applications of thin-layer chromatography (H. Kalász, M. Báthori). Planar chromatography. The ...
Chromatography, Micellar Electrokinetic Capillary. A hybrid separation technique combining both chromatographic and ... Correlation of micellar aggregation - complexation regimes to discern stability of micellar structure and nano-encapsulation. ... Increasing the Oral Bioavailability of 6-prenylnaringenin by Micellar Solubilization. Micellar encapsulation will be tested to ... To test this, we study the light-activated proton pump proteorhodopsin (PR) in micellar surfactant solutions because it is ...
This subtechnique of capillary electrophoresis is termed micellar electrokinetic chromatography.. "Electrophoresis" is ... Capillary bridge in apparatus for determining ionic activity. US4952266. 8 Sep 1988. 28 Ago 1990. Fuji Photo Film Co., Ltd.. ... Capillary electrophoresis device. US8535536 *. 2 Jul 2010. 17 Sep 2013. University Of Utah Research Foundation. Cross-flow ... Channels of capillary dimension typically have an inside bore diameter ("ID") of from about 10 to 200 microns, more typically ...
... of polyethylene glycols and polypropylene glycols by capillary zone electrophoresis and micellar electrokinetic chromatography ... Bost RO, Sunshine I [ 1980]. Ethylene-glycol analysis by gas-chromatography. J Anal Toxicol 4(2):102-103. Cao XL, Zhu J [2001 ... OSHA Salt Lake City, UT: U.S. Department of Labor, OSHA Salt Lake Technical Center, Chromatography Team. ... 3-butylene glycol in human serum and urine by wide-bore column gas chromatography. J Chromatogr B: Biomed Appl 619(2):251-257. ...
Capillary Electrophoresis (CE) has had a very significant impact on the field of analytical chemistry in recent years as the ... Micellar Electrokinetic Capillary Chromatography. Inclusion Pseudophases. Metal-complexing Pseudophases. Other Types of ... Capillary Electrophoresis (CE) has had a very significant impact on the field of analytical chemistry in recent years as the ... 7. Applications of Capillary Electrophoresis. Biomolecules. Pharmaceutical and Clinical Analysis. Inorganic Ions. Hydrocarbons ...
4.1.1.2.4. Capillary Isoelectric Focusing Market. 4.1.1.2.5. Micellar Electrokinetic Capillary Chromatography. 4.1.1.2.6. ... Capillary Electrophoresis Market. 4.1.1.2.1.1.1. Capillary Gel Electrophoresis Market. 4.1.1.2.2. Capillary Zone ... Electrophoresis Market by Product (Gel Electrophoresis , Capillary Electrophoresis, Reagents, Geldoc, Imaging), Application ( ... Capillary Isotachophoresis Market. 4.1.2. Electrophoresis Reagents Market. 4.1.2.1. Protein Reagents Market. 4.1.2.2. Nucleic ...
Micellar Electrokinetic Chromatography (MEKC) 31. IEF 31. Capillary Electro Chromatography (CEC) 31. Capillary Isotachophoresis ... CAPILLARY ELECTROPHORESIS 30. Capillary Zone Electrophoresis (CZE) 30. Capillary Gel Electrophoresis (CGE) 30. ... Chromatography 21. RAPID DNA ELECTROPHORETIC SEPARATION METHOD 21. FOURIER TRANSFORM CAPILLARY ELECTROPHORESIS 22. HORIZONTAL ... CAPILLARY ISOELECTRIC FOCUSING (CIEF) FOR STUDYING CELLULAR. MICROORGANISMS 24. A NOVEL CE TECHNOLOGY PLATFORM 25. CHAPTER 5 ...
Publications] Hiroto Ozaki, et al.: Micellar electrokinetic chromatography-mass spectrometry using a high-molecular-mass ... Publications] Kiyohiro Koezuka: Separation and detection of closely related peptides by micellar electrokinetic chromatography ... Publications] Kiyohiro Koezuka: Separation and detection of closely related peptides by micellar electrokinetic chromatography ... MICELLAR ELECTROKINETIC CHROMATOGRAPHY / カフェイン / 胆汁酸塩. Research Abstract. A Hitachi M-1000 quadrupole mass spectrometer ...
Moore, A.W. et al., "Microchip Separations of Neutral Species via Micellar Electrokinetic Capillary Chromatography," Anal. Chem ... to function as input capillaries or variously input and output capillaries. As used herein, the term "capillaries" generally ... In preferred aspects, such capillaries may be embodied in a tubular capillary elements that are coupled to an overall body ... "Micromachining of Capillary Electrophoresis Injectors and Separators on Glass Chips and Evaluation of Flow of Capillary ...
Many of these developments have focused on the coupling of capillary electrophoresis (CE), a separation technique with low ... Jang, L.-W.; Razu, M.E.; Jensen, E.C.; Jiao, H.; Kim, J. A fully automated microfluidic micellar electrokinetic chromatography ... Yang, Z.; Shen, X.; Chen, D.; Sun, L. Microscale Reversed-Phase Liquid Chromatography/Capillary Zone Electrophoresis-Tandem ... Sheath buffer is supplied from a coaxial capillary and flows into the emitter tip surrounding the separation capillary. The ...
... separation of nitrofuran antibiotics and their metabolites by using micellar electrokinetic capillary chromatography. ...
Stephen Palfrey brings together for first time a collection of detailed capillary electrophoresis protocols designed ... Steroid Analysis by Micellar Electrokinetic Capillary Chromatography Amin A. Mohammad, John R. Petersen, Michael G. Bissell ... Clinical Applications of Capillary Electrophoresis demonstrates clearly the simplicity, versatility, and power of CE over ... Quantification of Human Cytomegalovirus by Competitive PCR and Capillary Electrophoresis Zhongxin Yu, W. Douglas Scheer, James ...
This problem can be overcome using either micellar electrokinetic capillary chromatography (MECC; Liu et al. 2002) or laser- ... Analysis of plant hormones in tobacco flowers by micellar electrokinetic capillary chromatography coupled with on-line large ... Ludewig M, Dörffling K, Konig WA (1982) Electron-capture capillary gas chromatography and mass spectrometry of ... Müller MJ, Brodschelm W (1994) Quantification of jasmonic acid by capillary gas chromatography-negative chemical-ionization ...
Recent developments in high-resolution separation techniques based on capillary-scale chromatography and electrophoresis have ... capillary isotachophoresis (CITP), capillary gel electrophoresis (CGE), and micellar electrokinetic chromatography (MEKC), are ... Analysis of 2-Aminoacridone-Derivatized Complex Oligosaccharides Using Micellar Electrokinetic Capillary Chromatography and ... Recent developments in high-resolution separation techniques based on capillary-scale chromatography and electrophoresis have ...
Micellar electrokinetic capillary chromatography for the determination of Viagra and its metabolite (UK-103,320) in human serum ... Micellar electrokinetic capillary chromatography for the determination of Viagra and its metabolite (UK-103,320) in human serum ... Micellar electrokinetic capillary chromatography (MEKC) was investigated for the determination of Viagra (sildenafil citrate, ... as separation electrolyte and a fused-silica capillary. This method gave satisfactory interday precision with respect to ...
Microchip separations of neutral species via micellar electrokinetic capillary chromatography. Analyt. Chem. (in the press). ... Micromachining a miniaturized capillary electrophoresis-based chemical analysis system on a chip. Science 261, 895-897 (1993). ... Jacobson, S.C., Koutny, L.B., Hergenröder, R., Moore, A.W. Jr & Ramsey, J.M. Microchip capillary electrophoresis with an ...
  • Micellar electrokinetic chromatography (MEKC), is a chromatography technique, used in analytical chemistry. (wikipedia.org)
  • In most applications, MEKC is performed in open capillaries under alkaline conditions to generate a strong electroosmotic flow. (wikipedia.org)
  • We have investigated free-solution capillary electrophoresis (FSCE) and micellar electrokinetic capillary chromatography (MECC) separations of metallothionein (MT) isoforms conducted in uncoated and surface-modified fused-silica capillaries. (elsevier.com)
  • The separations were performed in 89 mM phosphate buffer (pH 7.4) containing 52 mM sodium dodecyl sulfate (SDS) in fused silica capillaries with UV absorption detection at 200 nm. (omicsonline.org)
  • The retention time of a solute should then be within the range: t M ≤ t r ≤ t c {\displaystyle t_{M}\leq t_{r}\leq t_{c}} Charged analytes have a more complex interaction in the capillary because they exhibit electrophoretic mobility, engage in electrostatic interactions with the micelle, and participate in hydrophobic partitioning. (wikipedia.org)
  • A method for simultaneous determination of polyamines and catecholamines in cell extracts by micellar electrokinetic capillary chromatography with UV detection at 254 nm was established at the first time. (mst.edu)
  • Simultaneous Determination of Catecholamines and Polyamines in PC-12 Cell Extracts by Micellar Electrokinetic Capillary Chromatography with Ultraviolet Absorbance Detection," Journal of Chromatography B , vol. 805, no. 2, pp. 281-288, Elsevier, Jun 2004. (mst.edu)
  • Short-chain alcohols or acetonitrile can be used as organic modifiers that decrease t M {\displaystyle t_{M}} and k 1 {\displaystyle k^{1}} to improve the resolution of analytes that co-elute with the micellar phase. (wikipedia.org)
  • We conclude that optimal separation of MT isoforms by capillary electrophoresis (CE) can be achieved with the appropriate combination of different capillaries, buffers and sample preparation techniques. (elsevier.com)
  • It is a modification of capillary electrophoresis (CE), where the samples are separated by differential partitioning between micelles (pseudo-stationary phase) and a surrounding aqueous buffer solution (mobile phase). (wikipedia.org)
  • Interior capillary surface coatings such as polyamine and linear polyacrylamide polymers permit separation of MT isoforms with enhanced resolution through their effects on electroosmotic flow (EOF) and protein-wall interactions. (elsevier.com)
  • In conventional chromatography, separation of similar compounds can be improved by gradient elution. (wikipedia.org)
  • Journal of Chromatography B: Biomedical Sciences and Applications , Vol. 669, No. 1, 07.07.1995, p. 27-37. (elsevier.com)
  • RICHARDS, MP & BEATTIE, JH 1995, ' COMPARISON OF DIFFERENT TECHNIQUES FOR THE ANALYSIS OF METALLOTHIONEIN ISOFORMS BY CAPILLARY ELECTROPHORESIS ', Journal of Chromatography B: Biomedical Sciences and Applications , vol. 669, no. 1, pp. 27-37. (elsevier.com)
  • A double-injection micellar electrokinetic chromatography (DIMEKC) method for the identification of Ɛ- caprolactam and melamine deliberately added to povidone (polyvinylpyrrolidone) products has been developed. (omicsonline.org)
  • Capillary electrophoresis experiments were performed on a ProteomeLab PA 800 system (Beckman Instruments Inc., Fullerton, CA, USA), equipped with a photodiode array (PAD) system that monitored the wavelengths between 190 nm and 400 nm. (omicsonline.org)
  • Determination of five hormone drug residues in fish tissue by high performance liquid chromatography with gel permeation chromatographic clean-up [J]. Chinese Journal of Chromatography, 2010, 28(4): 388-392. (chrom-china.com)
  • Routine High Performance Liquid Chromatography of Hepatitis C cDNA/PCR Products. (uni-salzburg.at)
  • Application of Micropellicular Poly-styrene/divinylbenzene Stationary Phases for High-Performance Liquid Chromatography Electrospray-Mass Spectrometry of Proteins and Peptides. (uni-salzburg.at)
  • Capillary electrophoresis (CE) is a powerful, well-established analytical technique that provides numerous valuable benefits over other separation methods including high-performance liquid chromatography. (intechopen.com)
  • Different selective and specific analysis procedures were developed for the determination of phenol derivatives, in particular alkylphenols, in environmental relevant matrices using High-Performance Liquid Chromatography - Mass Spectrometry (HPLC-MS), High-Performance Liquid Chromatography- Nuclear-Magnetic Resonance Spectrometry (HPLC-NMR), Gas Chromatography- Mass Spectrometry (GC-MS) and Capillary Electrophoresis (CE). (hu-berlin.de)
  • In this work a simple high-performance liquid chromatography coupled with diode array detector (HPLC-DAD) method was established for determination of flavonoids (shown in Physique 1) fromP. (cylch.org)
  • This paper describes methods for solid phase extraction and high performance liquid chromatography (HPLC). (unt.edu)
  • Methods discussed include: Nano Gas Chromatography, Nano Capillary Electrophoresis, Nano Chiral Chromatography, Micellar Electrokinetic Chromatography, Supercritical Fluid Chromatography, and Nano High Performance Liquid Chromatography. (separationsnow.com)
  • 8. The system of claim 7, wherein the column is a fused-silica capillary separation column electrokinetically packed with a high-performance liquid-chromatography stationary phase. (freepatentsonline.com)
  • Analytical methods reported mainly include thin layer chromatography (TLC) (6), high-speed counter current chromatography (HSCCC) (7, 8), micellar electro kinetic chromatography (MEKC) (9), capillary zone electrophoresis (CZE) (10), high-performance liquid chromatography (HPLC) (11-13) and ultra-performance liquid chromatography (UPLC) (14). (deepdyve.com)
  • SPB has specialized in analytical micro extraction technologies, on development and applications of artificial liquid membranes, and on electrokinetic separation methods. (wiley.com)
  • Capillary Electrophoresis (CE) has had a very significant impact on the field of analytical chemistry in recent years as the technique is capable of very high resolution separations, requiring only small amounts of samples and reagents. (researchandmarkets.com)
  • Objective: Our aim was to develop a capillary electrophoretic method for the simultaneous separation of four quinolones and also to optimize the analytical conditions. (actamedicamarisiensis.ro)
  • It treats the theoretical aspects of chromatography briefly, to the degree that the information helps the use and development of new analytical methods for the separation of any kind of food components. (schweitzer-online.de)
  • Chromatography in Food Science and Technology will be of interest to analytical chemists in research and development, and analytical quality control specialists in food and beverage processing companies, as well as researchers and students. (schweitzer-online.de)
  • Kosmetikoen osagai hautatuak determinatzeko kromatografia elektrozinetiko mizelarrean oinarritutako metodoen garapena eta aplikazioa es (The development and application of methods based on micellar electrokinetic chromatography to determine selected components of cosmetics) is the title of his Ph.D. thesis written up in the UPV/EHU's Faculty of Chemistry in the Department of Applied Chemistry (Analytical Chemistry Group), under the supervision of Esmeralda Millán, a tenured lecturer of the UPV/EHU. (eurekalert.org)
  • In Clinical Applications of Capillary Electrophoresis, Stephen Palfrey brings together for first time a collection of detailed capillary electrophoresis protocols designed exclusively for clinical applications. (springer.com)
  • Capillary electrophoresis is again segmented into micellar electrokinetic capillary chromatography, capillary isoelectric focusing, capillary isotachophoresis and others. (medgadget.com)
  • CE deploys a liquid separation technique using narrow bore, fused, silica capillaries to fractionate molecules. (prnewswire.com)
  • The utility of liposomes in CE was further extended by developing a novel procedure for immobilising liposomes inside fused silica capillaries. (diva-portal.org)
  • Moore, A.W. Jr, Jacobson, S.C. & Ramsey, J.M. Microchip separations of neutral species via micellar electrokinetic capillary chromatography. (nature.com)
  • CE was also evaluated for experimental modelling of passive intestinal membrane permeability by studying analyte migration in liposomal, microemulsion and micellar electrolytes. (diva-portal.org)
  • The conventional capillary zone electrophoresis (CZE) is limited to the separation of ionic compounds. (fz-juelich.de)
  • consequently an efficient separation using the conventional capillary zone electrophoresis is hard to be achieved. (scielo.br)
  • The applicability of capillary electrophoresis for the analysis of four extensively used penicillin derivatives (benzylpenicillin, ampicillin, amoxicillin, oxacilllin) has been studied. (scielo.br)
  • Conclusions: The capillary electrophoretic method developed in the present work proved to be suitable for the routine analysis of statins and can be adopted as quality control protocol in pharmaceutical analysis. (actamedicamarisiensis.ro)
  • Analysis of protamine peptides in insulin pharmaceutical formulations by capillary electrophoresis. (ac.be)
  • Capillary electrophoresis in aqueous and non-aqueous media was tested to separate these peptides with very close amino acid sequences. (ac.be)
  • Finally, a micellar electrokinetic capillary chromatography method using a capillary of 120 cm effective length and an aqueous background electrolyte made up of 100 mM phosphate buffer (pH 2) and 50 mM Thesit(R) gave the best results, providing the separation of the four major protamine peptides within 25 min. (ac.be)
  • Differences in the electrophoretic mobilities of different molecules cause the fractions of the sample to emerge separated at the outlet end of the capillary tube. (google.com)
  • J]. Chinese Journal of Chromatography, 1999, 17(2): 187-189. (chrom-china.com)
  • J]. Chinese Journal of Chromatography, 1999, 17(1): 26-29. (chrom-china.com)
  • J]. Chinese Journal of Chromatography, 1999, 17(1): 52-54. (chrom-china.com)
  • Recovery of Thuringiensin with Cetylpyridinium Chloride Using Micellar-Enhanced Ultrafiltration Process, Biotechnology Progress, vol. 15, No. 3, pp. 580-586 (1999). (freepatentsonline.com)
  • 1996. Capillary electrophoresis of Cheddar cheese. (usu.edu)
  • Based on technology, the human identification analysis software market is segmented into polymerase chain reaction, purification and extraction, next-generation sequencing, microarray, automated liquid handling, capillary electrophoresis and DNA testing. (medgadget.com)
  • A Comparative Study of Capillary Zone Electrophoresis and High-Performance Liquid Cchromatography in the Analysis of Oligonucleotides and DNA. (uni-salzburg.at)
  • High-Resolution Liquid Chromatography of Oligonucleotides on Highly Crosslinked Poly(styrene-divinylbenzene) Particles. (uni-salzburg.at)
  • High-Resolution Liquid Chromatography of DNA Fragments on Non Porous Poly(styrene-divinylbenzene) Particles. (uni-salzburg.at)
  • The capillary tube in which the electrophoresis is performed has been flared, at least at its sample entrance end, to remove sharp corners which contribute to aberrations in the electric field distribution in a radial direction and result in differential migration of molecules depending on their proximity to the sharp corners. (google.com)
  • Capillary Electrophoresis (CE) was explored as a means for physicochemical and biopharmaceutical characterisation of small drug molecules. (diva-portal.org)
  • The Use of trisodium citrate to improve the textural properties of acid-induced, transglutaminase-treated micellar casein gels," Molecules, vol. (thefreedictionary.com)
  • The capillary electrophoresis system G1600A from Agilent is available. (fz-juelich.de)
  • A basic schematic of a capillary electrophoresis system is shown in figure 1. (wikipedia.org)
  • The mutual separation of heavy lanthanoid elements and yttrium was performed by high-speed countercurrent chromatography (CCC) provided with a multilayer coiled column containing a toluene solution of 2-ethylhexyl- phosphonic acid mono-2-ethylhexyl ester. (go.jp)
  • The 10th International Countercurrent Chromatography Conference (CCC 2018) was held at Technische Universität Braunschweig, Germany, from August 1st-3rd, 2018. (usda.gov)
  • J]. Chinese Journal of Chromatography, 1997, 15(2): 156-158. (chrom-china.com)
  • J]. Chinese Journal of Chromatography, 1997, 15(2): 159-160. (chrom-china.com)
  • corylifoliaby using HPLC MS spectra gas chromatography (GC) and micellar electrokinetic capillary chromatography. (cylch.org)
  • The elementary parts of a CE system are a high voltage power supply, a source and destination vial, a fused silica capillary, electrodes and a detector. (fz-juelich.de)
  • The system's main components are a sample vial, source and destination vials, a capillary, electrodes, a high voltage power supply, a detector, and a data output and handling device. (wikipedia.org)
  • If, on the contrary, sample constituents are widely dispersed in the capillary tube, the constituents are difficult to identify and quantify. (google.com)
  • In Capillary Electrophoresis of Carbohydrates, hands-on experts describe cutting-edge techniques in capillary electrophoresis (CE) for the analysis of complex carbohydrates. (springer.com)
  • Timely and highly practical, Capillary Electrophoresis of Carbohydrates provides both novice and experienced CE analysts with powerful tools for the successful separation of complex carbohydrates by capillary electrophoresis. (springer.com)
  • One challenge of studying MPs in artificial micellar surfactant environments is that many factors modulate their structures and functionalities, including the surfactants that interact with the MP or their assembly into oligomers. (bioportfolio.com)
  • The capillary is directly passed through the detector. (fz-juelich.de)
  • Reformulated skim milks (RSM) were manufactured by blending freshly processed micellar casein concentrate (MCC) 95% serum protein reduced, or serum protein isolate, at the equivalent protein content as skim milk (3.3%) with milk permeate. (thefreedictionary.com)
  • Capillary Zone Electrophoresis of Aldoses, Ketoses and Uronic Acids Derivatized with Ethyl-p-aminobenzoate. (uni-salzburg.at)
  • Capillary Zone Electrophoresis of p-Aminobenzoic Acid Derivatives of Aldoses, Ketoses and Uronic Acids. (uni-salzburg.at)
  • This is carried out by capillary zone electrophoresis in double-injection mode using polybrene/chondroitin sulfate A double-coated capillaries. (diva-portal.org)
  • Based on the capillary zone electrophoresis theory, we extracted the relevant affecting factors such as temperature, voltage, pH, inlet sample pressure and injection time. (ebscohost.com)
  • Background: In this work the applicability of capillary zone electrophoresis for the separation of quinolones from different generations has been studied. (actamedicamarisiensis.ro)
  • Recent developments in high-resolution separation techniques based on capillary-scale chromatography and electrophoresis have transformed the analysis of free and conjugated mono- and oligosaccharides. (springer.com)