Effects of Feeding Diets Containing Alfalfa, Nori or Pine needle Meals on Cecal Size, Cecal Urease Activity and Serum Urea Concentration in Male and Female Rats = 알팔파, 김 또는 솔잎 분말을 함유한 사료의 급여가 쥐의 성별, 맹장 크기, 맹장 요소분해 효소 활성 및 혈청 요소수준에 미치는 영향

다국어 초록 (Multilingual Abstract)

A study was conducted to investgate the effect of feedmg diets containing alfalfa, nori or pine-needle meal on cecal size and cecal urease activity in male and female rats. Six male and six female Sprague Dawley rats(initd mean weight, 92g) were assigned to each of the following diets : a control diet or diets contai-ning 10% alfalfa, nori or pine-needle meal. All the diets contained 5% corn oil and 5% lard. After a 4-week feedmg period, rats were lulled and cecal contents and blood samples were collected. Rats fed the control or nori meal diet had higher(P < .01) average dady feed intake(ADF1) and average dady gain(ADG) and lower feed again ratio(F/G) than rats fed diets containing alfalfa and pine-needle meals. Male rats showed much higher(P < .01) average dady gain, and lower(P < .01) F/G than females. Ammonia concentration(㎛d ammonia per g collected contents) in the cecum(blank or before incubation) was hgher(P < .05) in the control than in the other groups. Urease activity in a g of cecal contents of rats fed diets containmg nori or pine-needle meal was much lower(P < .01) than that of rats fed the control or alfalfa meal diet, but was not dfferent between sexes. However, total urease activity in the contents was not Sicantly Merent between the detary treatments. Interestingly, male rats showed hgher(P < .01) total urease activity in the contents but lower(P < .01> plasma urea concentration than did female rats. Results of our study indicated that dletary nori or pine-needle meal increases cecal size and decreases cecal urease activity perhaps due to soluble fiber present in the ingrdents. The &her total urease activity in the cecal contents of male than that of female rats is interesting, but its mechanism is yet to be studied. The effect of sex on blood urea concentration is considered due to dffe-rent amounts of protein intake per unit body weight.

목차 (Table of Contents)

• 요약 = 77
• Ⅰ. INTRODDUCTION = 78
• Ⅱ. MATERIALS AND METHODS = 79
• Ⅲ. RESULTS AND DISCUSSION = 81
• Ⅳ. SUMMARY = 85
• Ⅴ. REFERENCES = 86