Physiological function of insoluble dietary fiber prepared from exploded oak wood (Quercus mongolica).
This study investigated the production of insoluble dietary fiber using exploded and chemically treated oak wood (Quercus mongolica) and the physiological functions of prepared insoluble dietary fiber in laboratory animals. To produce high quality insoluble dietary fiber, the steam explosion treatment was performed at 25 kgf/cm2 pressure for 6 minutes. In the chemical analysis of insoluble dietary fiber, exploded oak wood was pretreated by 1% sodium hydroxide solution. The insoluble dietary fiber contained 7.6% residual lignin and 61.7% of alpha-cellulose. In order to compare the physiological functions of prepared insoluble dietary fiber with those of commercial insoluble dietary fiber, Sprague-Dawley male rats weighing 100 +/- 10 g were randomly assigned to one normal diet and five high cholesterol diets, containing 1% cholesterol. The high cholesterol diet groups were classified as the fiber-free diet (FF group), 5% commercial alpha-cellulose diet group (5C group), 10% commercial alpha-cellulose group (10C group), 5% insoluble dietary fiber group (5M group) and 10% insoluble dietary fiber group (10M group). Food intake, weight gain and food efficiency ratio in high cholesterol groups were significantly higher than those of the normal group, but there were no significant differences among the high cholesterol diet groups. In addition, there were no significant differences in the weights of liver, kidney and small intestine in insoluble dietary fiber-supplemented groups. Cecum weights in all insoluble dietary fiber groups were significantly higher than those of the FF group. There were no significant differences in the activities of the glutamic pyruvic transaminase (GPT) and glutamic oxaloacetic transaminase (GOT) among the insoluble dietary fiber-supplemented groups. In conclusion, the prepared insoluble dietary fiber and the commercially available insoluble fiber showed the same physiological effects. Moreover, the preparation method for the insoluble dietary fiber from the exploded oak wood was successful.
Yang
Jae-Kyung
JK
Faculty of Forest Science and Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Republic of Korea.
Choi
Myung-Suk
MS
Kim
Chang-Joon
CJ
Shin
Yong-Seung
YS
Han
Dae-Yong
DY
Han
Sang-Woo
SW
Lim
Bu-Kug
BK
Lee
Jong-Yoon
JY
Rhee
Soon-Jae
SJ
Kim
Eun-Hee
EH
Kim
Gon-Sup
GS
D000410:Alanine Transaminase / Q000097:blood; D000818:Animals; D001065:Appendix / Q000033:anatomy & histology; D001219:Aspartate Aminotransferases / Q000097:blood; D019149:Bioreactors; D002482:Cellulose / Q000032:analysis / Q000494:pharmacology; D002791:Cholesterol, Dietary / Q000008:administration & dosage*; D004043:Dietary Fiber / Q000494:pharmacology*; D004435:Eating; D007421:Intestine, Small / Q000033:anatomy & histology; D008031:Lignin / Q000032:analysis / Q000494:pharmacology; D008099:Liver / Q000033:anatomy & histology; D008297:Male; D009929:Organ Size; D028321:Plant Preparations / Q000737:chemistry / Q000494:pharmacology*; D029963:Quercus; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D012995:Solubility; D013227:Steam; D015430:Weight Gain
D002791:Cholesterol, Dietary; D004043:Dietary Fiber; D028321:Plant Preparations; D013227:Steam; D002482:Cellulose; D008031:Lignin; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase