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  • compounds
  • Aqueous solutions of these compounds were gamma-irradiated at doses of 0.5, 0.7 and 1 kGy, with a dose rate of 0.04 kGy/min, in the presence of air, followed by HPLC, HPLC-MS, EPR, and UV-VIS spectroscopy analysis of the resulting mixtures. (readbyqxmd.com)
  • Chromatography, a more powerful but more complex procedure to separate compounds Extraction Multiphasic liquid Separating funnel Laurence M. Harwood, Christopher J. Moody (13 June 1989). (wikipedia.org)
  • From these earliest studies and screening numerous compounds, it was determined that for thermoreversible gels based on the amide-carbonyl hydrogen bond, amino acid structure, enantiopurity, hydrophilic-lypophilic ratio, and increasing peptide substitution greatly affected the gelling ability of various new compounds. (wikipedia.org)
  • This tandem technique can be used to analyze biochemical, organic, and inorganic compounds commonly found in complex samples of environmental and biological origin. (wikipedia.org)
  • 1950s
  • The coupling of chromatography with MS is a well developed chemical analysis strategy dating back from the 1950s. (wikipedia.org)
  • Chromatography technique developed substantially as a result of the work of Archer John Porter Martin and Richard Laurence Millington Synge during the 1940s and 1950s, for which they won the 1952 Nobel Prize in Chemistry. (wikipedia.org)
  • solvents
  • Grignard reactions), THF fills that role in many others, where strong coordination is desirable and the precise properties of ethereal solvents such as these (alone and in mixtures and at various temperatures) allows fine-tuning modern chemical reactions. (wikipedia.org)
  • amino
  • Fluorescence and inhibition versus pH studies of the β-glucosidase-iminosugar complexes revealed that the amino group in the inhibitor is unprotonated when bound, while one of the active site carboxylates is protonated. (rsc.org)
  • molecule
  • Instead, a mixture containing the molecule to be detected is applied directly on a membrane as a dot, and then is spotted through circular templates directly onto the membrane or paper substrate. (wikipedia.org)
  • equilibrium
  • The stability of a gel is dependent on the equilibrium between the assembled network and the dissolved gelators. (wikipedia.org)
  • Solvent
  • Usually, the mixture is dissolved in a suitable solvent such as dichloromethane or diethyl ether (ether), and poured into a separating funnel. (wikipedia.org)
  • All other previously known gel phase transitions have occurred as the result of temperature changes and only one previous case documents this type of solvent dependent morphological change. (wikipedia.org)
  • different
  • leading to different morphologies of the gel in carbon tetrachloride (CCl4). (wikipedia.org)
  • Achiral Lewis acids have been used for decades to promote the synthesis of racemic mixtures in a myriad different reactions. (wikipedia.org)
  • The various constituents of the mixture travel at different speeds, causing them to separate. (wikipedia.org)
  • Researchers found that the main principles of Tsvet's chromatography could be applied in many different ways, resulting in the different varieties of chromatography described below. (wikipedia.org)
  • agarose
  • Using a low voltage (~10 V/cm) to minimize the risk for heat damage, electricity is run across an agarose gel. (wikipedia.org)
  • This technique utilizes a high voltage (≥ 20 V/cm) with a 0.5× Tris-borate buffer run across an agarose gel. (wikipedia.org)
  • form
  • The addition of an acid to a mixture of an organic base and acid will result in the acid remaining uncharged, while the base will be protonated to form a salt. (wikipedia.org)
  • Gels self-assemble through non-covalent interactions such as π-stacking, hydrogen-bonding, or Van der Waals interactions to form volume-filling 3D networks. (wikipedia.org)
  • A lower MGC is desired to minimize the amount of gelator material needed to form gels. (wikipedia.org)
  • In any form of chromatography, the rate at which the solute moves down the column is a direct reflection of the percentage of time the solute spends in the mobile phase. (wikipedia.org)
  • high
  • Journal of High Resolution Chromatography. (wikipedia.org)
  • At the beginning of the run, a mixture of solutes to be separated is applied to the column, under conditions selected to promote high retention. (wikipedia.org)
  • For gel-type ion exchangers, selectivity reversal at very high ionic strength can also provide a solution. (wikipedia.org)
  • To denature the SDS-resistant complexes a high activation energy is required, which is achieved by heating. (wikipedia.org)
  • ligand
  • The delivery system comprises a mixture of cationic lipid in combination with a receptor ligand and is particularly suited for intracellular delivery of polynucleotides. (google.com)
  • In 1993, Wulff and coworkers found a complex derived from diethylaluminium chloride and a "vaulted" biaryl ligand below catalyzed the enantioselective Diels-Alder reaction between cyclopentadiene and methacrolein. (wikipedia.org)
  • thickness
  • In a typical mini-gel setting, the spacers have a thickness of 0.75 mm or 1.5 mm, which determines the loading capacity of the gel. (wikipedia.org)
  • Products
  • Overall, the interface is a mechanically simple part of the LC-MS system that transfers the maximum amount of analyte, removes a significant portion of the mobile phase used in LC and preserves the chemical identity of the chromatography products (chemically inert). (wikipedia.org)
  • This leads to the production of racemic mixtures of products. (wikipedia.org)
  • suitable
  • al were suitable for forming hard gels, including gels with chloroform, which had been resistant to gelation prior to their discovery. (wikipedia.org)
  • development
  • Rapidly, it was realized that the analysis of complex mixtures would require the development of a fully automated on-line coupling solution in LC-MS. The moving-belt interface (MBI) was developed in 1977. (wikipedia.org)
  • chloride
  • In 1993, Wulff and coworkers found a complex derived from diethylaluminium chloride and a "vaulted" biaryl ligand below catalyzed the enantioselective Diels-Alder reaction between cyclopentadiene and methacrolein. (wikipedia.org)
  • At the start of the 1950s, Kraus and Nelson demonstrated the use of many analytical methods for metal ions dependent on their separation of their chloride, fluoride, nitrate or sulfate complexes by anion chromatography. (wikipedia.org)
  • bound
  • Immobilization using affinity relies on the specificity of an enzyme to couple an affinity ligand to an enzyme to form a covalently bound enzyme-ligand complex. (wikipedia.org)
  • acid
  • 9. The improvement of claim 1 in which the perfluoro ion exchange polymer is a mixture of perfluorosulfonic acid polymer and perfluorocarboxylic acid polymer of equivalent weight less than 1000. (google.es)
  • The addition of an acid to a mixture of an organic base and acid will result in the acid remaining uncharged, while the base will be protonated to form a salt. (wikipedia.org)
  • result
  • Stimulation of the immune system, which includes stimulation of either or both innate immunity and adaptive immunity, is a. complex phenomenon that can result in either protective or adverse physiologic outcomes for the host. (allindianpatents.com)
  • method
  • A detection method is used to determine the presence and extent of the ligand-receptor complexes formed, and this is usually determined electrochemically or through a fluorescence detection method. (wikipedia.org)
  • In 1979, a method for anion chromatography with non-suppressed conductivity detection was introduced by Gjerde et al. (wikipedia.org)
  • Following it in 1980, was a similar method for cation chromatography. (wikipedia.org)
  • It is a popular method for analyzing anionic elements or complexes that help solve environmentally relevant problems. (wikipedia.org)
  • The method spread slowly until the advent of effective zone electrophoresis methods in the 1940s and 1950s, which used filter paper or gels as supporting media. (wikipedia.org)
  • elements
  • Most elements have a mixture of metallic and nonmetallic properties, and can be classified according to which set of properties is more pronounced. (wikipedia.org)
  • usually
  • Usually, the mixture is dissolved in a suitable solvent such as dichloromethane or diethyl ether (ether), and poured into a separating funnel. (wikipedia.org)
  • applications
  • Since the 1950s, electrophoresis methods have diversified considerably, and new methods and applications are still being developed as Affinity electrophoresis, Capillary electrophoresis, Electroblotting, Electrophoretic mobility shift assay, Isotachophoresis, Pulsed-field gel electrophoresis, and Preparative electrophoresis. (wikipedia.org)