Prommajak, Trakul Kim, Sang Moo Pan, Cheol-Ho Kim, Sang Min Surawang, Suthat Rattanapanone, Nithiya 2024-01-20T06:34:11Z 2024-01-20T06:34:11Z 2021-09-05 2015-07 0125-2526 https://pubs.kist.re.kr/handle/201004/125276 The antioxidant capacity of extracts from 33 local Thai vegetables was determined by ABTS, DPPH, FRAP and FCRC assays. The extracts had a wide range of antioxidant activities and could be categorized into three groups: high, moderate and low antioxidant activities. The antioxidant activities of the four different assays were highly correlated (r > 0.98). Fourier transform infrared (FTIR) spectra and partial least square (PLS) regressions were used to predict the measured antioxidant capacities. The adjusted R-2 was higher than 0.97 for prediction models and higher than 0.89 for cross-validation models, which could be applied on liquid extracts or freeze-dried extract. FTIR spectroscopy in combination with PLS regression successfully predicted the antioxidant capacity of several Thai vegetables. English CHIANG MAI UNIV CIOCALTEU REDUCING CAPACITY PHENOLIC-COMPOUNDS MEDICINAL-PLANTS FLAVONOIDS PREVENTION CHEMISTRY DISEASES ASSAYS FRUIT HERBS Prediction of Antioxidant Capacity of Thai Vegetable Extracts by Infrared Spectroscopy Article 1 CHIANG MAI JOURNAL OF SCIENCE, v.42, no.3, pp.657 - 668 CHIANG MAI JOURNAL OF SCIENCE 42 3 657 668 scie scopus 000360136500011 Multidisciplinary Sciences Science & Technology - Other Topics Article CIOCALTEU REDUCING CAPACITY PHENOLIC-COMPOUNDS MEDICINAL-PLANTS FLAVONOIDS PREVENTION CHEMISTRY DISEASES ASSAYS FRUIT HERBS Thai vegetables antioxidant infrared spectroscopy partial least square regression