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Volume 51 (1998)
- Issue 6 Pages 323-
- Issue 5 Pages 245-
- Issue 4 Pages 157-
- Issue 3 Pages 121-
- Issue 2 Pages 47-
- Issue 1 Pages 1-
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Volume 51, Issue 6
Displaying 1-7 of 7 articles from this issue
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Nobuko MARUYA, Naoko SHIRASUGI-KATAOKA, Yuko OKAMOTO, Tomoko TANIGUCHI ...1998 Volume 51 Issue 6 Pages 323-332
Published: December 10, 1998
Released on J-STAGE: December 10, 2009
JOURNAL FREE ACCESSWe have investigated the heat stability of refined Perilla oil (PO) without additives during continuous heating in a test tube for 10h at 180°C by measuring the acid value (AV), carbonyl value (CV), p-anisidine value (p-An. V), percentages of residual tocopherols and those of residual fatty acids. Prolonged heating brought about greater deterioration of PO than soy-bean oil. With 10h heating of PO, CV and p-An. V. increased to 131.0 and 242.4, respectively, in spite of the low value of 0.20 for AV. By 70min of heating, although deterioration of PO was somewhat greater than that of SO, 93.6% residual α-linolenic acid and 87.0% residual total tocopherol remained in the former. The effect of water on the heat-induced deterioration of oils was compared between PO and SO following deep-frying of cotton balls containing certain amounts of distilled water successively in the both oils at 182±2°C, for 60min. The increase of AV of PO after adding the water was somewhat greater than that of SO, while the CV, p-An. V and POV increased to a similar extent in either oil. Greater deterioration of PO occurred upon addition of FeCl3, glucose and water to the oil, but addition of glycine inhibited the deterioration considerably.View full abstractDownload PDF (1324K) -
Yasuhiro TOBA, Yukihiro TAKADA, Seiichiro AOE1998 Volume 51 Issue 6 Pages 333-338
Published: December 10, 1998
Released on J-STAGE: December 10, 2009
JOURNAL FREE ACCESSThe effect of coexisting lactose and milk protein on the calcium (Ca) bioavailability of Ca carbonate was compared with that of a skim milk diet and a milk component-free diet containing Ca carbonate. Six-week-old male rats were divided into four groups: those given a skim milk powder diet (SM group), a skim milk powder diet in which half of the Ca was replaced with Ca carbonate (SM+CaCO3 group), a Ca carbonate diet with added milk components (MC+CaCO3 group), and without milk components (CaCO3 group), respectively. Rats were fed on each experimental diet for 46 days. No significant differences in food efficiency and body weight gain were found among the four groups. On the other hand, apparent Ca absorption at 7 weeks of age and femoral bone mineral densities (BMD) in the SM, SM+CaCO3 and MC+CaCO3 groups were higher than those in the CaCO3 group. The apparent Ca absorption rate and BMD were almost the same among the experimental groups receiving diets containing milk components (SM, SM+CaCO3 and MC+CaCO3 groups). These results suggest that the administration of lactose and milk protein is as effective on the Ca availability of Ca carbonate as that of Ca in skim milk powder.View full abstractDownload PDF (834K) -
Teruyo MOCHIZUKI, Aiko UEDA, Masataka ISHINAGA1998 Volume 51 Issue 6 Pages 339-343
Published: December 10, 1998
Released on J-STAGE: December 10, 2009
JOURNAL FREE ACCESSThe daily intake of various kinds of lipids by 100 Japanese men (30-59 years of age) was measured directly using the duplicate portion method. The daily intake of total fatty acid (TFA), cholesterol (CHO), plant sterol, and phospholipid (PL) amounted to 44.8g, 295.5mg, 194.1mg, and 2.9g, respectively. The TFA intake of the 30-39-, 40-49- and 50-59-year age groups was 51.8, 41.3, and 45.1g per day, respectively. The saturated fatty acid content differed significantly between the 30-39- and 40-49-year age groups. The mean daily intake of fatty acids derived from marine products was 1.2g per day, and the mean n-6/n-3 ratio was 4.3. The CHO intake of the 30-39-, 40-49- and 50-59-year age groups was 273.8, 274.7, and 331.3mg per day, respectively. A strong correlation was observed only between CHO and PL intake.View full abstractDownload PDF (671K) -
Seiichi KASAOKA, Tatsuya MORITA, Michiyoshi IKAI, Akira OHHASHI, Shuha ...1998 Volume 51 Issue 6 Pages 345-353
Published: December 10, 1998
Released on J-STAGE: December 10, 2009
JOURNAL FREE ACCESSMale SD rats were fed freely one of the following diets; 65.5% sucrose (SU), 60% corn starch (CS), 10%, 20% and 40% high-amylose corn starch (HAS) or 11% beet dietary fiber (BDF) for 4 weeks. HAS and BDF were substituted for the same amount of corn starch. The weights of epididymal fat pads were significantly lower in rats fed the HAS diets than in those fed the SU and CS diets. The lipid/protein ratio in the carcass was significantly lower in rats fed the 40% HAS diet than in those fed the SU and CS diets. The concentrations of serum lipids and liver triglycerides were reduced in accordance with an increase in the dietary level of HAS. All the variables determined except fecal excretion of total bile acids and neutral sterols were comparable between the 40% HAS and BDF-fed groups. There was a significant and positive correlation between serum cholesterol concentration and the weight of epididymal fat pads or the lipids/protein ratio in the carcass. These results suggest that HAS prevents a rise in both serum triglyceride and cholesterol concentration, and fat accretion.View full abstractDownload PDF (1268K) -
Yoshiharu ETO, Tomomi ITO, Shigeko NISHIOKA1998 Volume 51 Issue 6 Pages 355-359
Published: December 10, 1998
Released on J-STAGE: December 10, 2009
JOURNAL FREE ACCESSThis study was an attempt to isolate and identify the short-chain peptides which inhibit angiotensin I converting enzyme (ACE) from an enzymatic hydrolysate of whey protein. Four ACE-inhibitory peptides were isolated from the hydrolysate (WPH) of whey protein isolate (Isolac) obtained using alkaline proteases (Bacillus subtilis protease N and porcine pancreatic trypsin). The ACE-inhibitory peptides were purified to homogeneity from the WPH by gel filtration on a Toyopearl HW-40 column, reverse-phase HPLC on a Asahipak ODP-50 4E column and a SMART system using μRPC C2/C18 SC 2.1/10. The amino acid sequences of four peptides identified by Edman degradation were Phe-Leu, Val-Tyr, Ile-Leu and Val-Phe, and their IC50 values (the concentration of the peptide required to inhibit 50% of the ACE activity) for ACE from rabbit lung were 16.0, 17.7, 21.2, and 55.5μM, respectively. Among these dipeptides, Phe-Leu and Ile-Leu were found for the first time in food protein hydrolysate. Although the digestive resistance of these peptides has not yet been clarified, the present results suggest the potential application of the WPH as an ingredient of physiologically functional food to prevent hypertension.View full abstractDownload PDF (706K) -
Yasuhide SAKURAMATA, Shuichi KUSANO1998 Volume 51 Issue 6 Pages 361-364
Published: December 10, 1998
Released on J-STAGE: December 10, 2009
JOURNAL FREE ACCESSThe effects of extracts from several plants on lipolysis were examined by measuring glycerol released from mature 3T3-L1 cells. First, citrus unshu peel (chinpi) and bitter orange peel (touhi) were found to possess quite potent activities for promotion of lipolysis. Second, it was found that citrus unshu peel, which had the strongest activity, released a large quantity of fatty acid and decreased the intracellular level of triglyceride. When 3T3-L1 cells were cultivated in a medium supplemented with extract from citrus unshu peel for 20 days, lipid droplets in the cells were reduced in volume. This phenomenon was consistent with a significant decrease in intracellular triglyceride. These results suggest that extracts of citrus unshu peel and citrus fruit peel exhibit marked lipolysis-stimulating activities in 3T3-L1 cells.View full abstractDownload PDF (2193K) -
T. OHSAWA1998 Volume 51 Issue 6 Pages 365-371
Published: December 10, 1998
Released on J-STAGE: December 10, 2009
JOURNAL FREE ACCESSDownload PDF (902K)
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