Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states
A study has been conducted on adsorption of semisynthetic flavonoid venoruton on the surface of highly dispersed silica (HDS) modified with polyvinylpyrrolidone (PVP). It has been found that an adsorption value of venoruton for the modified silica was 20% higher than that of hydroxylated silica surf...
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| Дата: | 2002 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
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Інститут хімії поверхні ім. О.О. Чуйка НАН України
2002
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| Назва видання: | Поверхность |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/126361 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states / T.V. Kulik, N.P. Galagan, V.K. Pogorelyi, V.A. Pokrovskiy // Поверхность. — 2002. — Вип. 7-8. — С. 143-145. — Бібліогр.: 5 назв. — англ. |
Репозитарії
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irk-123456789-1263612017-11-21T03:02:38Z Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states Kulik, T.V. Galagan, N.P. Pogorelyi, V.K. Pokrovskiy, V.A. Surface chemistry of silica and related sorbents A study has been conducted on adsorption of semisynthetic flavonoid venoruton on the surface of highly dispersed silica (HDS) modified with polyvinylpyrrolidone (PVP). It has been found that an adsorption value of venoruton for the modified silica was 20% higher than that of hydroxylated silica surface. By the temperature-programmed desorption technique with the mass-spectrometric registration of volatile constituents (TPD MS) a research has also been made into decomposition of venoruton adsorbed by system PVP-HDS. It has been shown that the number of stages of thermolysis of carbohydrate parts of venoruton molecules adsorbed on the modified surface decreases down to one while in the case of the condensed state there are two stages of carbohydrate portion thermolysis and in the situation with the adsorption on the hydroxylated HDS surface there are three stages. As far as the system venoruton-PVP-HDS is concerned, the maximum rate of volatile constituent elimination (destruction of carbohydrate parts of molecules) is shifted towards high temperature region by 130°C in comparison with the condensed state and by 200°C in comparison with the state set up during adsorption on the hydroxylated HDS surface. The increase in the thermal stability of venoruton adsorbed by the PVPHDS system is related to the effect of PVP polymer chains, which block the access of venoruton molecules to active sites of the silica surface. 2002 Article Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states / T.V. Kulik, N.P. Galagan, V.K. Pogorelyi, V.A. Pokrovskiy // Поверхность. — 2002. — Вип. 7-8. — С. 143-145. — Бібліогр.: 5 назв. — англ. XXXX-0106 http://dspace.nbuv.gov.ua/handle/123456789/126361 en Поверхность Інститут хімії поверхні ім. О.О. Чуйка НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Surface chemistry of silica and related sorbents Surface chemistry of silica and related sorbents |
| spellingShingle |
Surface chemistry of silica and related sorbents Surface chemistry of silica and related sorbents Kulik, T.V. Galagan, N.P. Pogorelyi, V.K. Pokrovskiy, V.A. Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states Поверхность |
| description |
A study has been conducted on adsorption of semisynthetic flavonoid venoruton on the surface of highly dispersed silica (HDS) modified with polyvinylpyrrolidone (PVP). It has been found that an adsorption value of venoruton for the modified silica was 20% higher than that of hydroxylated silica surface. By the temperature-programmed desorption technique with the mass-spectrometric registration of volatile constituents (TPD MS) a research has also been made into decomposition of venoruton adsorbed by system PVP-HDS. It has been shown that the number of stages of thermolysis of carbohydrate parts of venoruton molecules adsorbed on the modified surface decreases down to one while in the case of the condensed state there are two stages of carbohydrate portion thermolysis and in the situation with the adsorption on the hydroxylated HDS surface there are three stages. As far as the system venoruton-PVP-HDS is concerned, the maximum rate of volatile constituent elimination (destruction of carbohydrate parts of molecules) is shifted towards high temperature region by 130°C in comparison with the condensed state and by 200°C in comparison with the state set up during adsorption on the hydroxylated HDS surface. The increase in the thermal stability of venoruton adsorbed by the PVPHDS system is related to the effect of PVP polymer chains, which block the access of venoruton molecules to active sites of the silica surface. |
| format |
Article |
| author |
Kulik, T.V. Galagan, N.P. Pogorelyi, V.K. Pokrovskiy, V.A. |
| author_facet |
Kulik, T.V. Galagan, N.P. Pogorelyi, V.K. Pokrovskiy, V.A. |
| author_sort |
Kulik, T.V. |
| title |
Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states |
| title_short |
Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states |
| title_full |
Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states |
| title_fullStr |
Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states |
| title_full_unstemmed |
Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states |
| title_sort |
mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states |
| publisher |
Інститут хімії поверхні ім. О.О. Чуйка НАН України |
| publishDate |
2002 |
| topic_facet |
Surface chemistry of silica and related sorbents |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/126361 |
| citation_txt |
Mass-spectrometric study of thermal decomposition of some polyketides in condensed and adsorbed states / T.V. Kulik, N.P. Galagan, V.K. Pogorelyi, V.A. Pokrovskiy // Поверхность. — 2002. — Вип. 7-8. — С. 143-145. — Бібліогр.: 5 назв. — англ. |
| series |
Поверхность |
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2023-10-18T20:50:38Z |
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