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Showing 1 to 20 of 857 for “"solid-phase"”.
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Pseudostationary Phase for Solid Phase Extraction
A unique pseudostationary phase for Solid Phase Extraction is presented. This pseudostationary phase consists of surfactant, which is initially immobilized onto hydrophilic cation exchange resin. The surfactant chain through hydrophobic interactions extracts hydrophobic analytes in the same manner …
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Extending the Limits of Solid Phase Microextraction
<p>Solid phase microextraction (SPME) is a solventless extraction technique that combines sample preparation and sample introduction into a gas chromatograph into a single step. For the past 20 years, solid-phase micro-extraction (SPME) has been used in numerous fields such as: food analysis, …
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Solid phase microextraction of amino-dinitrotoluenes in tissue.
… in environmental matrixes and tissues. Solid phase microextraction (SPME) was used to extract ADNTs (amino-dinitrotoluenes) from tissue as a potential method to investigate the recalcitrance of metabolically-generated ADNTs versus absorbed ADNTs. Tubifex tubifex was allowed to metabolize …
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Solid-phase combinatorial chemistry and scintillation proximity assays
… resins. The utility of POP-supports in solid-phase synthesis was also demonstrated successfully. The incorporation of (4’-vinyl)-4-benzyl-2,5-diphenyloxazole in varying mole percentage into the monomer composition resulted in the production of chemically functionalised …
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APPLICATION OF LAYERED DOUBLE HYDROXIDES IN SOLID-PHASE EXTRACTION
In various sample preparation methods, solid-phase extraction (SPE) is one of the most popular techniques. It has been in use for many decades and yet is able to meet new challenges, such as minimization solvent and sorbent specifically and improvement in the work flow of laborious operations. …
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Solid Phase Synthesis of M-Phenylene Ethynylene Oligomer Heterosequences
… process. To address this, two methods for the solid-phase synthesis of mPE oligomers (including heterosequences) have been developed. The first strategy employs a silyl-acetylene linker attached to ArgoGel(TM) solid support, and uses palladium-catalyzed cross-coupling reactions to form the …
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Advancements in polymer resins for solid-phase peptide synthesis
The use of polymeric supports in solid-phase peptide synthesis has allowed for the facile, rapid synthesis of short peptides in a one bead/one sequence manner. This approach allows for screening peptide libraries for binding and catalytic activities. Once hits are found, the sequence of the active …
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Studies on Solid-Phase Peptide Synthesis: The Synthesis of Glucagon
<p>The feasibility of the stepwise-solid phase approach was studied in the synthesis of the peptide hormone glucagon. The choice of this molecule was based upon: (1) the unusual chemical structure; (2) biological significance. The main features of the strategy employed are: (1) the use of …
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Solution and solid phase synthesis of N,N'-diacetyl chitotetraoses
… for the protected diacetyl chitotetraoses by solid phase synthesis have also been described.
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A rapid, simple solid-phase immunofluorometric assay : development and characterization
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Applied Biological Sciences, 1991.
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Extraction of alcohols from gasoline using solid phase microextraction (SPME)
… and quantification of EtOH in gasoline by solid phase microextraction (SPME). The major problem in quantifying EtOH in gasoline is the coelution of hydrocarbons with EtOH. There have been several approaches to solve this problem; among the chromatographic ones, three major types have been …
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On an Order-Parameter Model of Solid-Solid Phase Transitions
We examine a model of solid-solid phase transitions that includes thermo-elastic effects and an order parameter. The model is derived as a special case of the Gurtin-Fried model posed in one space dimension with a symmetric triple-well free energy in which the relative heights of the wells vary …
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Electrically Controlled Formation and Release of Admicelles for Solid Phase Extraction
<p>Solid phase extraction is one of the most widely used methods to concentrate diluted compounds in a solution. Substances can be extracted into admicelles and hemimicelles, which are surface adsorbed micelles and surfactant monolayers, respectively. Investigations of the electrical control of …
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Comparison of Liquid-Liquid Extraction and Solid Phase Extraction of Mephedrone
… focused on comparing liquid-liquid extraction to solid phase extraction to determine if there was a difference and which was more efficient. Synthetic urine samples were spiked with mephedrone, extracted using both methods, and analyzed with GC-MS. Spiked synthetic urine samples were also analyzed …
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Aqueous and solid phase interactions of radionuclides with organic complexing agents
… and natural sand (as simple environmental solid phase). A UV spectrophotometric and an IC method were developed to monitor the behaviour of EDTA, NTA and picolinic acid in the later experiments. The optimised methods were simple, applied widely-available instrumentation and achieved the …
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Studies of the Evaluation of Solid Phase Dispersants in Polymer Blends
… and graft copolymers of ethylene-styrene as solid phase dispersants (SPDs) were added to blends containing equal proportions of LDPE and PS. Since this composition represents the poorest balance of properties in this system, it has been found that the addition of SPDs generally increases …
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Effect of Anisotropic Solid-Phase Thermal Conductivity on Vertical Bridgman Growth
… to the growth direction of directionally solidified specimens. We study the effects of anisotropy by performing computations using measured components of the thermal conductivity tensor, and by considering macroscopically isotropic (e.g., polycrystalline) solid benzene, as well as …
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Improvement of solid phase transition simulations, by developing the supporting database
The modern approach to modelling of welding leads to the phenomenological description of the complex thermo-mechano-metallurgical (TMM) process and finite element (FE) solution of this problem. The TMM process requires four groups of data that define material properties, welding control variables, …
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