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Volume 64, Issue 1
Displaying 1-4 of 4 articles from this issue
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Original Papers
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Ayato Kanda, Yuka Imori, Setsuko Hara2011 Volume 64 Issue 1 Pages 3-10
Published: 2011
Released on J-STAGE: May 27, 2011
JOURNAL FREE ACCESSTriacylglycerols (TAGs) containing conjugated linolenic acid (CLN) lack oxidative stability. In general, the oxidative stability of oils and fats depends on their fatty acid composition, and when the fatty acid composition is equal, the TAG molecular species has a decisive influence on oxidative stability. In the present study, structured oils containing 24% or 45% CLN were prepared by introducing CLN into oleic acid-rich TAG by enzymatic transacylation, and mixed oils containing 24% or 45% CLN were prepared by mixing oleic acid-rich TAG and Tung oil. The influence of TAG molecular species on the oxidative stability of the TAGs containing CLN was evaluated by comparing the oxidation stabilities of the TAGs. The molecular species of the TAGs containing CLN were analyzed by HPLC, and this revealed that TAG consisting of three molecules of CLN (3CLN-TAG), was present in the mixed oils, while TAG consisting of one or two molecules of CLN was present in the structured oils. In addition, the results of autoxidation and heating oxidation tests indicated no difference in the oxidative behavior of TAG between the structured oil and the mixed oil containing 24% CLN. However, the structured oil containing about 45% CLN showed an obviously high oxidative stability in comparison with mixed oil containing about 45% CLN. These results indicate that structured oils lacking 3CLN-TAG are more stable against oxidation.View full abstractDownload PDF (1326K) -
Yoko Nakashima, Akiko Ishida, Yukari Watanabe2011 Volume 64 Issue 1 Pages 11-17
Published: 2011
Released on J-STAGE: May 27, 2011
JOURNAL FREE ACCESSTo investigate the influence of dietary restriction in dams on the food choice of their pups after weaning, control and restricted groups of dams were fed free access to AIN-93G or restricted diet (65% of that consumed by the control group), respectively. After weaning, all the pups were placed on a two-choice diet program, including a carbohydrate-protein diet (CPD) and a fat-protein diet (FPD), for 24 days. Although no significant difference in birth weight was observed, at weaning, the body weight of pups nursed by dams fed the restricted diet was lower than that of pups nursed by dams fed the control diet. Ratio of body weight gain [body weight gain (g) /body weight at weaning (g) ] during the self-selection period in the male and female control groups was 2.6 and 2.0, respectively, and that in the male and female restricted groups was 4.0 and 3.0, respectively. In male and female pups, the ratio of body weight gain in the restricted group was higher than that in the control group. In week 2 and 3 during the self-selection period, the ratio of the FPD intake [FPD intake (g) /total intake] in male pups in the restricted group was higher than that in the control group. Therefore it was considered that male pups of dams fed the restricted diet showed a strong preference for fat to achieve catch-up growth after weaning.View full abstractDownload PDF (662K)
Research Notes
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Shiori Wakisaka, Takehiro Matsumoto, Hajime Nagai, Emi Mura, Toshio Mo ...2011 Volume 64 Issue 1 Pages 19-25
Published: 2011
Released on J-STAGE: May 27, 2011
JOURNAL FREE ACCESSElectrogastrography (EGG) is a method for recording gastric myoelectrical activity using cutaneous electrodes from the abdominal surface. To investigate the effects of water temperature and volume on gastric myoelectrical activity, we performed three tests in a randomized parallel design, using the following samples: 15°C/250 mL (Cold250), 65°C/250 mL (Hot250), and 65°C/150 mL (Hot150) in 27 young women at 9 a.m. after an overnight fast. EGG recordings were made before (20 min) and after (35 min) ingestion to determine the frequency and power ratio of normogastria with the band set at around 3 cycles per min. The frequency of normogastria was transiently increased after ingestion of Hot250, but temporarily decreased after Cold250, showing significantly different changes in time courses. No difference in the frequency of normogastria was evident between Hot250 and Hot150. The power ratio of normogastria was equally increased after ingestion of all samples. Our results suggest that hot water (65°C, >150 mL) can increase the frequency of the normal range of gastric motility; moreover, its power was transiently increased after water ingestion, regardless of temperature and volume.View full abstractDownload PDF (927K) -
Akane Noguchi, Akiho Moriyama, Shigeru Mineo, Yoko Fujisawa, Marika Su ...2011 Volume 64 Issue 1 Pages 27-33
Published: 2011
Released on J-STAGE: May 27, 2011
JOURNAL FREE ACCESSRecently, it has often been reported that certain polyphenols are useful for prevention of obesity. However, few investigations have been conducted on the anti-obesity effects of boysenberry polyphenols, including anthocyanins and ellagic acid. Therefore, we examined whether boysenberry juice (BJ) would prevent obesity in Wistar rats fed normal and high-fat diets containing 5% BJ for 12 weeks. At the end of the feeding period, our data revealed significant decreases in body weight gain, body fat accumulation, and liver lipid levels, especially triglyceride (TG) and total cholesterol, in the rats fed diets containing 5% BJ (BJ group) compared with the rats fed diets without BJ (control group). Furthermore, we measured the plasma TG levels in rats fed each test diet after a 20-hour fast, and observed notable reductions in the postprandial plasma TG levels in the BJ group compared with the control group after 3 hours. These results suggest that consumption of BJ has potential preventive effects against obesity induced by a high-fat diet and associated metabolic syndrome.View full abstractDownload PDF (705K)
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