000 | 02218nam a22002773a 4500 | ||
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001 | UPMIN-00004810065 | ||
003 | UPMIN | ||
005 | 20240528160441.0 | ||
008 | 240525b |||||||| |||| 00| 0 eng d | ||
040 |
_aDLC _cUPMin _dupmin |
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041 | _aeng | ||
090 | 0 |
_aLG993.5 2010 _bF62 T56 |
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100 |
_aTinampay, Joanna Fe S. _eauthor _925915 |
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245 |
_aAntioxidant properties of langkawas (Alpinia galanga) and luyang tapul (Alpinia officinarum) / _cJoanna Fe S. Tinampay |
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260 | _c2010 | ||
300 | _a37 leaves. | ||
502 | _aThesis (BS Food Technology) -- University of the Philippines Mindanao, 2010 | ||
520 | 3 | _aLangkawas (Alpina galanga) and luyang tapul (Alpina officinarum) were evaluated for total phenolics and antioxidant activities using cold water extracts, antioxidant activities were also assessed as affected by boiling using 1, 1- diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay. Three boiling durations were investigated: 3 minutes, 5 minutes, and 7 minutes. The total phenolics of langkawas was found to be 0.89 mmol GAE/g extract while that of luyang tapul was 1.46 mmol GAE/ g extract. Evaluation of antioxidant activity of langkawas prior to boiling resulted in a value of 48.42 umol TE/ g extract while for luyang tapul, it was 135. 69 umol TE/ g extract. Upon boiling at the specified durations, langkawas exhibited the hghest increase in antioxidant activity after 5 minutes of boiling with 280.98 umol TE/ extract while luyang tapul exhibited the highest increase in antioxidant activity after boiling for 3 minutes with an activity of 286. 04 umol TE/ g extract. Results of the preliminary investigation on the total flavonoid content of the spices showed a value of 0.04 mmol CE/ g extract while for luyang tapul was 0.06 mmol CE/ g extract. Residual antioxidant activity analysis of the spices using methanol extraction showed that langkawas had 151.23 umol TE/ g extract while luyang tapul had 813 umol TE/ g extract. | |
650 | 1 | 7 |
_aLangkawas _925916 |
650 | 1 | 7 |
_aLuyang tapul _925917 |
650 | 1 | 7 |
_aEffect of boiling on the antioxidant activity _925918 |
658 |
_aUndergraduate Thesis _cFST200, _2BSFT |
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905 | _aFi | ||
905 | _aUP | ||
942 |
_2lcc _cTHESIS |
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999 |
_c2460 _d2460 |