Zobrazeno 1 - 10
of 30
pro vyhledávání: '"T.I. Usmanov"'
Publikováno v:
Chemistry of Natural Compounds. 33:530-533
The reactivities of the acetate groups in the saponification of cellulose triacetate (CTA) and amylose triacetate (ATA) have been characterized for the first time by analyzing the structures of the reaction products by PMR spectroscopy in solution. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdf06e7ba90d657ec7b8e3a2b5e5e5e5
https://doi.org/10.1007/bf02254795
https://doi.org/10.1007/bf02254795
Autor:
T.I. Usmanov
Publikováno v:
Polymer Science U.S.S.R.. 33:611-635
The results of experimental investigations to evaluate the reactivity of the hydroxyl groups and the structure of the products in chemical conversions of the polysaccharide chain using high-resolution NMR spectroscopy in its different variants (1H an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20e4a78e29c2027a0ef63eec0092c33a
https://doi.org/10.1016/0032-3950(91)90116-8
https://doi.org/10.1016/0032-3950(91)90116-8
Autor:
U.G. Karimova, T.I. Usmanov
Publikováno v:
Polymer Science U.S.S.R.. 32:1785-1795
The article dscribes a comparative study of the distribution ofsubtituents in the D-glucopyranoside unit, using 1H NMR and 13C NMR spectroscopy, as applied to the acetylation of amylose, dextran, and microcrystalline cellulose, which differ in some o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3a236df897541cfe9d7d6b044685ec2
https://doi.org/10.1016/0032-3950(90)90287-g
https://doi.org/10.1016/0032-3950(90)90287-g
Publikováno v:
Polymer Science U.S.S.R.. 32:1105-1113
13C NMR in solution has been employed to make a comparative study of the distribution of the substituents in carboxymethyl ethers of amylose, dextran and cellulose. The resonance signals of the 13C nuclei in the spectra of the compounds studied is fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5567520fe42e3680beebe115c2d14a2
https://doi.org/10.1016/0032-3950(90)90164-2
https://doi.org/10.1016/0032-3950(90)90164-2
Publikováno v:
Polymer Science U.S.S.R.. 28:1658-1666
Distribution of repeat units in cellulose acetates was followed by 1 H NMR. Quantitative data on the distribution of substituents in the polymer, in particular on localization of acetate groups on carbon atoms C-2, C-3, C-6 were obtained from spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b9c0dcc2992a8559725c375e3a5224e
https://doi.org/10.1016/0032-3950(86)90340-0
https://doi.org/10.1016/0032-3950(86)90340-0
Publikováno v:
Polymer Science U.S.S.R.. 29:1233-1237
Amylose nitrates of various degrees of substitution are synthesized and the 13 C NMR spectra are studied in solution. A full interpretation is given of all the signals of the 13 C nuclei, and the contents of mono-, di-, tri- and unsubstituted α-D-gl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::137989b432239d5526e229967349ec73
https://doi.org/10.1016/0032-3950(87)90143-2
https://doi.org/10.1016/0032-3950(87)90143-2
Publikováno v:
Polymer Science U.S.S.R.. 31:2259-2265
The 13C NMR method in the solid phase using cross-polarization and rotation of the sample at the magic angle has been employed to investigate cellulose acetates over a wide range of degrees of substitution and their model compounds. The signals in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2904b7188ededc9a0d9cab650eba868c
https://doi.org/10.1016/0032-3950(89)90077-4
https://doi.org/10.1016/0032-3950(89)90077-4
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