Suchergebnisse

Rice bran oil (RBO) was fractionated into 2 phases, solid (S-RBO) and liquid (L-RBO), using acetone at -18 degrees C and the weight yield of each S-RBO and L-RBO was 45.5% and 54.5%, respectively. Then, trans-free hard fat was synthesized from trans-free substrate of S-RBO and fully hydrogenated soybean oil (FHSBO) at different molar ratios (S-RBO : FHSBO; 1:1, 1:1.5, 1:2, and 1:3) with Lipozyme TL IM lipase (10% of total substrate). Conjugated linoleic acid (CLA, 20% of total substrate) was used as functional fatty acids for the production of trans-free hard fat. After fatty acid analysis, CLA (12.2% to 14.2%) was found on the triacylglycerol ( TAG) backbone of the interesterified products along with stearic (37.6% to 49%), palmitic (15% to 17.9%), and oleic acids (13.3% to 19.2%). The interesterified product contained higher level of saturated fatty acid (62.6% to 70.1%) at sn- 2 position. Total tocopherols (alpha-, gamma-, and delta-; 1.4 to 2.6 mg/100 g) and phytosterols (campesterol, stigmasterol, and beta-sitosterol; 220.5 to 362.7 mg/100 g) were found in the interesterified products. From DSC results, solid fat contents of the interesterified products (S-RBO: FHSBO 1:1, 1:1.5, 1:2, and 1:3) at 25 degrees C were 23.1%, 27%, 30.1%, and 44.9%. The interesterified products consisted mostly of beta' form crystal with a small portion of beta form. The interesterified product (S-RBO : FHSBO 1:1.5) was softer than the physical blend but slightly harder than commercial shortenings as measured by texture analyzer. Thus, trans-free hard fat stock, which may have a potential functionality could be produced with various physical properties. ; This study was supported by the Korea Research Foundation, grant funded by the Korean government (KRF-2007-313-F00149). ; OAIID:oai:osos.snu.ac.kr:snu2009-01/102/0000050589/3 ; SEQ:3 ; PERF_CD:SNU2009-01 ; EVAL_ITEM_CD:102 ; USER_ID:0000050589 ; ADJUST_YN:Y ; EMP_ID:A077289 ; DEPT_CD:352 ; CITE_RATE:1.601 ; FILENAME:첨부된 내역이 없습니다. ; DEPT_NM:식품영양학과 ; EMAIL:keum@snu.ac.kr ; SCOPUS_YN:Y ; CONFIRM:Y ; N ; 1