Electrochemical measurements were performed to explore the influence of cationic surfactants on the corrosion inhibition in the moving fluid with and without abrasive particles. The surfactants MTABr, MTACl,TOMABr and TOMACl were used as corrosion inhibitors for martensitic stainless steel. The polarisation data showed that both surfactants used in this study acted as mixed type inhibitors, adsorbing on the stainless steel surface in agreement with the Flory-Huggins adsorption isotherm. Good inhibitory properties were achieved, when the concentration of added surfactants exceeded CMC values.
COBISS.SI-ID: 14191894
The synthesis and characterization of two polymorphic modifications of new cobalt coordination compound with 2-aminopyridine are reported. The modifications were prepared by the reaction of a solution of cobalt acetate tetrahydrate and 2-aminopyridine. The structures of both modifications are quite similar. In both of them the Co2+ is six coordinated by four O atoms from two bidentate chelate acetate ligands and by two N atoms from two 2-aminopyridine molecules.
COBISS.SI-ID: 13809942
A polymer-supported 1,4-butanediolvinyl ether derivative was used for removal of an olefin metathesis catalyst from the reaction solution. Poly(styrene-co-4-nitrophenyl acrylate), cross-linked with either ethylene glycol dimethacrylate or divinylbenzene was prepared via suspension polymerisation and modified chemically. A batch reaction of supported vinyl ether with M1 resulted in binding of the catalyst onto the polymer. A high accessibility of up to 43% of reactive sites in the polymer matrix could be achieved.
COBISS.SI-ID: 14383638
A new approach for increasing the relatively low surface area of polyHIPE material with micrometer scale pores, is described. Friedel-Crafts type reaction is used to connect neighbouring groups on the polymer matrix thus creating new pores, which are much smaller then existing ones. With controlling this reaction the amount of hypercrosslinking can be tailored. To such a support , an organic catalyst was bound and model reactions proved its efficiency. Reuse of the catalyst tethered to the polymer was testes through cycled use and no decrease of efficiency was observed.
COBISS.SI-ID: 13807382
The investigation presented here aims to compare the fatty acid composition of red blood cells of patients with different disease states and to test the hypothesis that the changes in fatty acid profiles derived from erythrocyte phospholipids might be relevant to various diseases. The resulting fatty acid and plasmalogen linked fatty acid composition was evaluated by the principal component analysis (PCA). The study sample consisted of 342 blood donors. The study demonstrates feasibility of multivariate data analysis in discrimination of patients with different diseases.
COBISS.SI-ID: 14417942