TY  - GEN
T1  - Antioxidative constituents of selected Malaysian `ulam`
A1  - Norhayati Y.
LA  - English
PB  - Forest Research Institute Malaysia
YR  - 2015
UL  - http://discoverylib.upm.edu.my/discovery/Record/oai:http:--agris.upm.edu.my:0-8743
AB  - Ten selected Malaysian `ulam` or salad were analyzed fora-tocopherol, ascorbic acid and carotenoids as well as catalase, ascorbate peroxidase and peroxidase specific activities. These included Sauropus androgynus (cekur manis),Piper sarmentosum (kaduk), Polygonum minus (kesum), Morinda citrifolia (mengkudu;young shoots), Centella asiatica (pegaga), Oenanthe javanica (selom), Manihot esculenta (ubi kayu; young shoots), Cosmos caudatus (ulam raja), Carica papaya (betik; young shoots) and Kaempferia galanga (cekur). The antioxidant production varied between the selected plants. For the nonenzymatic antioxidants, the highest production of alpha-tocopherol was observed in O. javanica and the lowest was in C. papaya shoots; P. sarmentosum exhibited significantly higher concentration of ascorbic acid and carotenoid and the least concentration was observed in C. asiatica and S. androgynus. Of all the `ulam` studied, M. citrifolia produced the highest specific activity of ascorbate peroxidase and the lowest was observed in K. galangal. Catalase specific activity was 3D-fold higher in S. androgynus compared to other `ulam` while P. sarmentosum managed to produce the highest specific activity of peroxidase. The results revealed that enzymatic and non-enzymatic antioxidants had central and interrelated roles acting both chemically and as substrates in detoxification reaction of reactive oxygen species. The combined action of these antioxidants might provide a better protection against the development of chronic diseases.
KW  - ANTIOXIDANTS
KW  - ENZYME ACTIVITY
KW  - SALADS
KW  - ASCORBIC ACID
KW  - PHENOLIC COMPOUNDS
KW  - PROTEIN CONTENT
KW  - MALAYSIA
KW  - http://www.fao.org/aos/agrovoc#c_511
KW  - http://www.fao.org/aos/agrovoc#c_2604
KW  - http://www.fao.org/aos/agrovoc#c_11358
KW  - http://www.fao.org/aos/agrovoc#c_661
KW  - http://www.fao.org/aos/agrovoc#c_5772
KW  - http://www.fao.org/aos/agrovoc#c_6251
KW  - http://www.fao.org/aos/agrovoc#c_4533
ER  -