Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 7672 IREC Farmers' Newsletter No. 195 ­ – Rice R&D 2016 antidiabetic and antihypertensive drugs in the prevention and management of these prevalent conditions. Development of such products could add significant value to rice bran, a major and underutilised by-product of rice milling, thus improving the profitability of the industry and increasing returns to rice farmers. The findings can also be used by the industry to better market rice as a healthy food — the consumption of which may provide significant health benefits to the consumer. For the general public, the findings could help improve their knowledge on the health benefits of rice and make a more informed choice when purchasing foods. For the scientific community, this project points to several major directions for further research on the beneficial health properties of rice bran proteins. Chief among these is the verification of the findings by animal model and human volunteer studies because, it needs to be pointed out that, the health benefit findings of the project are obtained by in vitro methods and they cannot be directly extrapolated to in vivo conditions in the body. And herein lie the implications for policy makers, as well as the rice industry, i.e. further funding should be provided to researchers to conduct animal model studies to confirm the findings obtained in this project, because without such confirmation, the health benefits found in the study can only be regarded as tentative. RIRDC Project PRJ-008720 Development of rice bran protein hydrolysate- based bioactive products Further information Dr Jian Zhao T: 02 9385 4304 E: [email protected] l Figure 1. Alpha-amylase inhibition activity of rice bran protein hydrolysates. The activity is a measure of the hydrolysate's capacity to block starch digestion. Albumin, glutelin, prolamin and globulin are proteins extracted from rice bran; Alcalase, Protemex, Flavourzyme and Neutrase are enzymes used for digesting the proteins. l Figure 2. ACE inhibition activity of rice bran protein hydrolysates. The activity is a measure of the hydrolysate's potential to lower blood pressure. l Figure 3. Antioxidant activity (ABTS inhibition) of rice bran protein hydrolysates. Rice bran protein Rice bran protein Rice bran protein Acarbose equivalent per mg peptide ACE inhibition (%) ABTS inhibition (%) Albumin Glutelin Prolamin Globulin Albumin Glutelin Prolamin Globulin Albumin Glutelin Prolamin Globulin Acarbose equivalent per mg peptide ACE inhibition (%) ACE inhibition (%) n Alcalase n Protamex n Flavourzyme n Neutrase n Alcalase n Protamex n Flavourzyme n Neutrase n Alcalase n Protamex n Flavourzyme n Neutrase