Size-exclusion-chromatography separation of randomly branched polymers with tetrafunctional branch points and local dispersity.

Summary of "Size-exclusion-chromatography separation of randomly branched polymers with tetrafunctional branch points and local dispersity."

The SEC separation of a randomly branched polymer, in particular local dispersity due to branching, are theoretically examined. A model of the SEC separation of randomly branched polymer with tetrafunctional branch points enabling the estimation of local dispersity was developed. Measurable quantities (branching indices) were compared with real data. Local dispersity due to branching is demonstrated to depend on elution volume and degree of branching and in the area of the beginning of the elution curve it can reach non-negligible values.


Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 162 06 Prague 6, Czech Republic. Electronic address:

Journal Details

This article was published in the following journal.

Name: Journal of chromatography. A
ISSN: 1873-3778
Pages: 97-101


DeepDyve research library

PubMed Articles [11768 Associated PubMed Articles listed on BioPortfolio]

Flory theory of randomly branched polymers.

Randomly branched polymer chains (or trees) are a classical subject of polymer physics with connections to the theory of magnetic systems, percolation and critical phenomena. More recently, the model ...

Highly fluorinated polymers with sulfonate, sulfamide and N,N-diethylamino groups for the capillary electromigration separation of proteins and steroid hormones.

Highly fluorinated polymers are promising materials in separation methods due to combination of high chemical and thermally stability, hydro- and oleophobicity and weak intermolecular forces. However,...

Separation of Vitamin E on a 100-Å Phenogel Column.

The effect of π-electrons and hydroxyl group on the separations of vitamin E on a swelling-controlled polystyrene-divinylbenzene (Phenogel) column using toluene/isooctane as the mobile phase was inve...

Influence of active layer on separation potentials of nanofiltration membranes for inorganic ions.

Active layers of two fully aromatic and two semi-aromatic nanofiltration membranes were studied along with surface charge at different electrolyte composition and effective pore size to elucidate thei...

Exceptional high selectivity of hydrogen/methane separation on a phosphonate-based MOF membrane with exclusion of methane molecules.

A phosphonate-based metal-organic framework membrane was constructed on a porous anodic alumina membrane (PAAM) substrate for H2/CH4 separation for the first time. Owing to the ultra-micro pore window...

Clinical Trials [2830 Associated Clinical Trials listed on BioPortfolio]

Physician-Modified Fenestrated and Branched Aortic Endografting for TAAA

A prospective, single-arm, traditional feasibility study of a physician-modified fenestrated Cook Zenith TX2 aortic endograft base device in adult patients meeting traditional size criteri...

Human Detection of Glucose Polymers

Although salivary contents play a major role in the early stage of food digestion process, their role in taste perception of glucose polymers is essentially unknown. It is hypothesized tha...

Effects of Branched-Chain Amino Acids on Muscle Ammonia Metabolism in Patients With Cirrhosis and Healthy Subjects

The purpose of this study is to determine whether Branched chain Amino Acids enhances the uptake of ammonia in muscle tissue.

Effect of Branched Chain Amino Acids on Muscle

With aging, there is a decrease in muscle mass and function especially in the energy storehouses of cells called mitochondria. Amino acids, the building blocks of protein, and insulin hav...

AtriCure Exclusion of the LAA in Patients Undergoing Concomitant Cardiac Surgery

Prospective, non-randomized trial to evaluate the safety and efficacy of the LAA Exclusion Device (Clip) for the exclusion of the LAA via epicardial tissue approximation.

Medical and Biotech [MESH] Definitions

A method of gel filtration chromatography using agarose, the non-ionic component of agar, for the separation of compounds with molecular weights up to several million.

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 separation technique which combines LIQUID CHROMATOGRAPHY and CAPILLARY ELECTROPHORESIS.

Use of various chemical separation and extraction methods, such as SOLID PHASE EXTRACTION; CHROMATOGRAPHY; and SUPERCRITICAL FLUID EXTRACTION; to prepare samples for analytical measurement of components.

A method of separation of two or more substances by repeated distribution between two immiscible liquid phases that move past each other in opposite directions. It is a form of liquid-liquid chromatography. (Stedman, 25th ed)

Quick Search

DeepDyve research library

Searches Linking to this Article