Biomedical subjects

P Strop

Publications and source records attributed to P Strop.

58 records · Page 4Linked to original sources

PubMed1979

Separation of oligonucleotides on ion-exchange derivatives of Spheron.

Diphenylamine-formic acid hydrolyzate of Bacillus subtilis DNA (a mixture of pyrimidine oligodeoxyribonucleotides) was chromatographed using an ionic strength gradient on seven ion exchangers: five DEAE-Spherons 300 of various capacities, two types of BD-Spheron 300 and DEAE-Sephadex A-25. The suitability of ion-exchange derivatives of Spheron for the chromatography of oligonucleotides is discussed. The separation of mono- to undeca-deoxyribonucleotides was achieved.

Bacillus subtilis↗

PubMed1977

Separation of alkyl derivatives of uracil by solvophobic adsorption chromatography on spheron.

Derivatives of such related substances as cytosine, uracil, thymine, 6-methyl-uracil, 5-ethyluracil, 5-propyluracil, 5-isopropyluracil, 5-cyclopropyluracil, 5-allyluracil, 5,6-trimethyleneuracil, 6-cyclopropyluracil, 5-cyclobutyluracil and 5-tert-butyluracil have been separated on a column of Spheron P-300. Retention on the column was found to depend on the size of the non-polar part of the molecule. The chromatographic behaviour is analyzed according to the theory of solvophobic chromatography.

Chemical Phenomena↗

PubMed1976

Chromatography of biopolymers and their fragments on ion-exchange derivatives of the hydrophilic macroporous synthetic gel spheron.

New ion-exchange materials have been developed from the synthetic glycol methacrylate gel Spheron: carboxymethyl-Spheron (weakly acidic); phosphonyl-Spheron (medium acidic); sulphonyl-Spheron (strongly acidic); diethylaminoethyl-Spheron (Type 1, weakly basic; Type 2, medium to strongly basic). Information is presented on the chromatographic characteristics of these new, macroporous, hydrophilic and rigid ion-exchangers as determined by experiments on the separation of mixtures of proteins, peptides, amino acids, nucleic acids, oligonucleotides, and nucleotides. The possibility is discussed of the use of ion-exchangers of this type in high-performance liquid chromatography of biopolymers.

Amino Acids↗

PubMed1976

Biological tolerance of copolymers of 2-hydroxyethyl methacrylate-vinylpyridine.

The healing-in of implants of terpolymer gels having different chemical composition was studied in animals. Histological analysis showed that all polymers under investigation are healed-in in a similar way by encapsulation with collagen fibrous tissue. Neither cancerogenic effect nor calcification were observed within the interval studied.

Acrylic Resins↗