Abstract:
A method for characterizing a polymer sample that includes the steps of withdrawing a polymer sample from a sample container into an injection probe of an auto- sampler where the probe is heated to maintain the withdrawn sample at a temperature of not less than about 75 degrees Celsius while resident in the probe. The heated injection probe resides in a first environment maintained at about ambient temperature while withdrawing the polymer sample. The method further includes loading at least a portion of the withdrawn sample into an injection port or a loading port of a liquid chromatography system where the injection port or loading port is adaptable for fluid communication with a chromatographic column. The chromatographic column resides in a heated second environment maintained at a temperature of not less than about 75 degrees Celsius. The loaded sample is injected into a mobile phase of the liquid chromatography system. The sample is maintained at a temperature but not les s than about 75 degrees Celsius during a period of time including from when the sample is withdrawn from the sample container to when the sample is within the heated second environment. The injected sample is chromatographically separated and a property of the sample or a composition thereof is detected.
Abstract:
Methods and apparatus for the evaluation of interactions between substances using inverse chromatography are disclosed. Preferably, interactions are evaluated between a liquid test sample and a solid phase comprising a receptor in the presence of a liquid carrier. Preferably, one of the modifying agent or receptor are members of a combinatorial library.
Abstract:
High-performance liquid chromatography (HPLC) methods and systems are disclosed that combine sequential, serial injection of a plurality of sample s into mobile-phases supplied in parallel to two or more chromatographic columns, such that staggered, parallel separation of the plurality of samples is effected. Because injecti on of samples is relatively fast as compared to separation, substantial efficiencies are gain ed with respect to overall sample throughput. The disclosed HPLC methods and systems are preferably applied in connection with combinatorial chemistry, combinatorial material science and more particularly, combinatorial synthesis and screening of polymeric materials
Abstract:
Disclosed are random radical (co)polymers containing -20 to 50 mol% of styrene as component A, -15 to 35 mol% of acrylic acid as component B, and -15 to 60 mol% of dimethylaminoethylmethacrylate (DMAEM) or 4-vinyl pyridine as component C; and dispersion formulations containing said (co)polymer, a dye selected from the group consisting of a monoazo dye, a quinophtalone dye, an anthraquinone dye, optionally further assistants, and an aqueous system; solid solutions containing said (co)polmyer, a dye selected from the group consisting of a monoazo dye, a quinophthalone dye, an anthraquinone dye, optionally further assistants; and dyeing formulations and formulations of inks for ink-jets comprising said dispersion formulation and optionally conventional dyeing auxiliaries.
Abstract:
Methods and systems for determining a dissolution profile of a sample material, and for solubilization screening of a library defined by an array comprising multiple sample materials are disclosed. The methods and systems are particularly advantageous for sampling and evaluation of very small samples, and can be advantageously applied in connection with evaluation of drug candidates.
Abstract:
Methods and apparatus for characterizing a polymer sample and in preferred embodiments, libraries of polymer samples, in a comprehensive, directly-coupled multi-dimensional liquid chromatography system are disclosed. The first and second dimensions are preferably high-performance liquid chromatography dimensions, such as for example, a first dimension adapted for determining composition e.g. adapted for mobile-phase gradient elution chromatography, including reverse phase chromatography, adsorption chromatography and the like), and a second dimension adapted for determining molecular weight or particle size (e.g., adapted for size exclusion chromatography, including gel permeation chromatography).
Abstract:
Controlled architecture polymers made preferably with acrylamide type monomers are prepared in living-type or semi-living-type free radical polymerizations, with the architecture preferably being other than linear, such as star, branched, grafted or hyper-branched. The controlled architecture polymers have high weight average molecular weights and low viscosities, which make them particularly useful in replaceable capillary electrophoresis separation media for biological molecules, such as DNA fragments.
Abstract:
Controlled architecture polymers made preferably with acrylamide type monomers are prepared in living-type or semi-living-type free radical polymerizations, with the architecture preferably being other than linear, such as star, branched, grafted or hyper-branched. The controlled architecture polymers have high weight average molecular weights and low viscosities, which make them particularly useful in replaceable capillary electrophoresis separation media for biological molecules, such as DNA fragments.
Abstract:
Disclosed is a method of making an array of n nanoparticular dispersion formulations, wherein said nanoparticular dispersion formulations each comprise -at least one nanodispersant, -at least one application media, -an active ingredient said method comprising the following steps: c) making said array of n nanoparticular dispersion formulations by c1) a parallelized solid solution route, or c2) a parallelized general precipitation route, or c3) a parallelized reactive precipitation route, d) parallelized, rapid serial or semi-parallel characterizing of said obtained n nanoparticular dispersion formulations; an array of at least 8 different nanoparticular dispersion formulations; a method of making an array of m nanodipersants by a parallel polymerization process; an array of at least 8 different nanodispersants; a method of making an array of n solid solutions by a parallelized solid solution route; and an array of at least 8 different.