Zobrazeno 1 - 10
of 180
pro vyhledávání: '"B.G. Belen'kii"'
Autor:
S. A. Trushin, O.I. Kurenbin, V. G. Mal'tsev, A.M. Podkladenko, D. G. Nasledov, B.G. Belen'kii
Publikováno v:
Journal of Chromatography A. 645:1-15
The peculiarities of zone migration and band broadening in the reversed-phase gradient HPLC of proteins were investigated. In the isocratic mode a critical composition of the mobile phase was found at which all proteins regardless of their molecular
Publikováno v:
Journal of Chromatography A. 609:355-362
The mechanism of the fractionation of two-block AB copolymers (BC), consisting of polystyrene (PS) as block A and poly(tert.-butyl methacrylate) (PtBMA) as block B, was studied by thin-layer chromatography (TLC). It is shown that under the critical c
Publikováno v:
Journal of Microcolumn Separations. 4:385-392
It is shown that an interference-polarizing refractometric detector makes it possible to use microcolumn size-exclusion chromatography (MSEC) columns with inner diameters of 0.2 to 0.5 mm and ensures a detection limit (at a signal to noise ratio of 3
Publikováno v:
Journal of Microcolumn Separations. 4:379-383
The problems of microcolumn size-exclusion chromatography and its instrumentation are considered. It is shown that the reproducibility of retention times of a micro-gel chromatograph depends on the stability of eluent delivery by a syringe micropump.
Publikováno v:
Journal of Membrane Science. 68:263-270
Some methods to increase the efficiency of membrane fractionation are described. Variation of solution ionic composition made it possible to vary the selectivity of membranes in the separation of a protein mixture. The deformability of flexible-chain
Publikováno v:
Journal of Chromatography A. 555:97-107
Macroporous polymeric membranes, approximately 1 mm thick, were synthesized from poly(glycidyl methacrylate-co-ethylene dimethacrylate). The epoxide groups were further derivatized to add different functional groups which are commonly used as station
Publikováno v:
Journal of Microcolumn Separations. 3:185-190
A method for quantitative determination of residual silanol groups on the surface of reversed-phase sorbents with the aid of microcolumn chromatography has bee developed. This method is based on the linear dependence of retention coefficients of phen
Publikováno v:
Polymer Science U.S.S.R.. 33:1250-1254
The concept of chromatographic “invisibility” of block copolymers in chromatography carried out in critical conditions has been verified experimentally. Block copolymers of styrene with tert -butyl methacrylate of type A-B were studied. The criti
Publikováno v:
Polymer Science U.S.S.R.. 33:2344-2352
Laws governing separation by thin-layer chromatography (TLC) of block copolymers of type AB, consisting of polystyrene (PS) and poly(tert-butyl methacrylate) (PBMA) blocks were studied. It has been shown that when TLC is carried out in conditions cri
Publikováno v:
Polymer Science U.S.S.R.. 33:1895-1902
The potential of a time-of-flight mass spectrometer with ionization by californium-252 fission products has been studied with regard to identification of oligomeric polystyrenes (PS) by means of their positive molecular ions M+. The optimized procedu