| ชื่อเรื่อง: | Khuwijitjaru, P., Plernjit, J., Suaylam, B., Samuhaseneetoo, S., Pongsawatmanit, R. Adachi, S. Degradation kinetics of some phenolic compounds in subcritical water and radical scavenging activity of their degradation products. The Canadian Journal of Chemical Engineering 92 (5): 810-815. DOI: 10.1002/cjce.21898
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| Khuwijitjaru, P., Plernjit,
J., Suaylam, B., Samuhaseneetoo, S., Pongsawatmanit, R. Adachi, S.
Degradation kinetics of some phenolic compounds in subcritical water and
radical scavenging activity of their degradation products. The Canadian Journal of Chemical Engineering 92 (5): 810-815. DOI: 10.1002/cjce.21898
|
| บทคัดย่อ: | The degradation of 10 phenolic compounds including 9 phenolic acids (caffeic, chlorogenic, p-coumaric, gallic, gentisic, p-hydroxybenzoic,
protocatechuic, syringic and vanillic acids) and one flavanol
(catechin) in subcritical water at the initial concentration of 100 mg/L
was investigated in a temperature range of 100–250°C for 30–120 min in a
batch-type vessel. The degradation process followed the first-order
kinetics model. After treatment at 250°C for 30 min, all the compounds
completely disappeared. We also demonstrated that the subcritical water
treatment of some phenolic compounds, especially, caffeic acid, resulted
in products that were quite stable at high temperature and exhibited a
high DPPH radical scavenging activity, that is retaining about 50% of
the DPPH radical scavenging activity compared to the original caffeic
acid solution after the treatment at 250°C for 120 min. |
| The degradation of 10 phenolic compounds including 9 phenolic acids (caffeic, chlorogenic, p-coumaric, gallic, gentisic, p-hydroxybenzoic,
protocatechuic, syringic and vanillic acids) and one flavanol
(catechin) in subcritical water at the initial concentration of 100 mg/L
was investigated in a temperature range of 100–250°C for 30–120 min in a
batch-type vessel. The degradation process followed the first-order
kinetics model. After treatment at 250°C for 30 min, all the compounds
completely disappeared. We also demonstrated that the subcritical water
treatment of some phenolic compounds, especially, caffeic acid, resulted
in products that were quite stable at high temperature and exhibited a
high DPPH radical scavenging activity, that is retaining about 50% of
the DPPH radical scavenging activity compared to the original caffeic
acid solution after the treatment at 250°C for 120 min. |
| ผู้จัดทำ: | รองศาสตราจารย์ ดร.ปราโมทย์ คูวิจิตรจารุ
ผู้ช่วยศาสตราจารย์ ดร.สุเชษฐ์ สมุหเสนีโต
54403206 : นางสาวบุณยนุช สวยล้ำ
51403203 : นางสาวจิราพร เพลินจิตต์ |
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