• 한국식품영양과학회지
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• 제3권1호
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• pp.1-5
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• 1974

Two 3-month old Wistar Strain male rats (weights was 270g and 340g respectively) were used as samples in order to determine the daily excretion of thiamine contained in urine and feces by the thiochrome reaction. The results were as follows. 1. Daily excretion of urine was 5,2 cc per 100 grams of body weight and that of thiamine was $18.65\;{\gamma}$ per 100 grams of plasma. 2. Daily excretion of feces was 2.4 grams per 100 grams of body weight and that of thiamine was $7.24\;{\gamma}$ per 100 grams of plasma. 3. Daily excretion of thiamine contained in urine is about twice the amount of thiamine excretion contained in feces. Thus, it can be concluded that more of the excretion of thiamine was mainly excreted through urine.

• 한국식품영양과학회지
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• 제2권1호
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• pp.31-34
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• 1973

The livers of the wistar strain male rats which had been mentioned in our study were analyzed by the micro-bioassay method for comparison of the levels of free branch-amino acids(valine, leucine, isoleucine) and phenylalanine, methionine, tyrosine. Rats which were fed on diet of higher protein score contained correspondingly higher level of free branch-amino acid in their liver while the levels of phenylalanine, methionine, tyrosine showed unrecognizable relationship with the protein score of the diet used.

• 생명과학회지
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• 제5권2호
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• pp.57-62
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• 1995

Casein or soybean protein was subjected to there action with caffeic acidtyrosinase system at 30-35$\circ$C, pH 6.8 with aeration for 5hr. The resulting brown proteins were washed with acetone until the washings were on longer colored. However, modified protein still retained a light brown. The effects of the modified proteins and brown compounds on male Wistar strain rats were studied by pair-feeding of a cholesterol-free diet for 14days. Significant decrease in protein digestibility for the rats fed with the modified proteins were observed. Weight gain and protein digestibility were not influenced by feeding brown compounds, but the feeding of brown compound from casein caused an enlargement of caecum. The concentrations of serum cholesterol and triglyceride in the rats fed with modified proteins and brown compounds were mostly unchanged against the rats fed with untreated proteins. These results suggest that the decrease in protein digestibility induced by enzymic browning-reaction did not cause the decrease in concentration of serum cholesterol.

• 한국식품위생안전성학회지
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• 제5권4호
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• pp.187-196
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• 1990

랫드에서 스트레스에 의한 위궤양 모델 개발과 이에 영향을 미치는 몇가지 요인을 알아보기 위하여 본 실험을 실시하였다. 랫드를 적당한 크기의 속박틀에 넣어 속박만 시킨 것, 속박과 함께 침수시킨 것, 수온을 달리한 것 ($20^{\circ}C와\;30^{\circ}C$), 주령을 달리한 것 (5주령과 10주령), 성(sex)을 달리한 것, 절식시킨 것과 절식시키지 않은 것, Strain(Wistar 랫드와 Sprague-Dawley 랫드)을 달리한 것 등의 조건을 두어 8시간 있게 하였고, 발생한 궤양의 길이를 합하여 궤양지수 (ulcer index)를 구하였다. 본 연구의 결과는 속박과 함께 물에 침수시킨 것이 속박만 시킨 것에 비해 궤양지수가 유의성있게 (p<0.001) 높았으며, 궤양은 선위(glandular stomach) \에 국한되어서 발생했다. 또한 수온이 낮은 것이 높은 것보다 궤양지수가 높았고(p<0.001), 절식시킨 것이 절식시키지 않은 것보다 궤양지수가 높았으며(p<0.001), 연령이 낮은것(5주령)이 높은 것 (10주령)보다 궤양지수가 높았다.(p<0.001) 그러나, 성별(sex)에 의한 감수성 차이나 품종간(strain)에 의한 감수성의 차이는 없었다.

• Parasites, Hosts and Diseases
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• 제30권4호
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• pp.283-288
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• 1992

현재 국내에서 사육 공급되는 실험용 흰쥐의 계통에 따라 감염되는 Pneumocystis carinii(Pc)의 핵형이 다르 다는 사실이 밝혀졌다. 특정 핵형의 병원체를 추적하여 전파를 파악하는 연구의 일환으로, 여러 다른 공급처에 서 얻은 Sprague-Dawley(SD), Fisher(F), Wistar(W) 흰쥐를 여러 장소에서 사육하면서 면역억제하여 Pc를 발현시키고, 이를 순수하게 모아서 field inversion gel electrophoresis를 사용하여 염색체 분자를 분리 관찰하였다. 한 실험실(A)에서 감염을 유발시킨 F 횐쥐는 두 공급원(P, K)에 따라서 같은 실험실에서 사육하였는데도 다른 핵형을 보였다. SD 횐쥐를 M, P, S 세 군데에서 공급받아 서로 격리된 다른 사육실 세 군데에 (A, B, C) 나누어 사육한 결과 P공급원의 횐쥐를 다른 밤 A와 C에서 사육하였는데 같은 핵형(I형)을 보였고, 또한 다른 두 공급원 M과 S에서 구한 SD 계통 흰쥐를 같은 방(B)에서 사육하여 같은 핵형 (II형)을 얻었다. P에서 공급한 F 흰쥐와 M에서 공급한 W 흰쥐를 A 사육실에서 SP 흰쥐와 함께 실험한 결과, F와 SD는 같은 Pc의 핵형 (I형)을 보이고, W는 감염 5주에 B 사육실의 늰퀴와 같은 유형 (II형)을 가졌으나 7주 및 8주에는 II 유형과 I 유형의 복합형을 나타내었다. 이러한 핵형 변화의 유형으로 이들 숙주가 면역억제될 때에는 잠재적으로 가지고 있는 Pc가 발현되나 같은 환경 내에 다른 중감염될 숙주가 있을 경우에는 이 동물로부터 또한 감염을 받는다는 사실을 확인하였다. 특히 상재성 병원체에 감염되지 않게 생산한 동물은 주위의 동물로부터 감염되는 것이 확실하며, 또한 단순하게 같은 방에서 다른 사육조(animal cage)에 사육을 하는 것으로 Pc의 전파가 일어난다는 사실로 미루어 보면, 이 병원체가 공기를 통하여 전파되는 것으로 추정할 수 있었다. (이 연구는 1990년도 서 울대학교 의과대학 발전기금에 의하여 지원되었음)

• 한국식품영양과학회지
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• 제3권1호
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• pp.7-11
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• 1974

Wistar Strain male rats were divided into four different diet groups and the control group was fed on seven percent casein diet (C), the second with a mixture of 80% of rice and 20% of buckwheat (RW), the third with rice only (R), and the fourth with a mixture of rice and buckwheat of equal nitrogen level (RWS). Each diet group consisted of six rats was fed for three weeks by the adlibitum feeding method. The results of the experiment, i, e, the growth gain and change in the level of branch-amino acids in the plasma determined by the micro-bioassay method were as follows. 1. The group C showed the largest growth gain and the rest did in the order of RW group, R group, and RWS group. 2. It was shown that rats fed on diet of higher protein score tend to have higher level of free branch-amino acids in the plasma. 3. Thus, the protein score may be estimated based on the level of the free branch-amino acids in the plasma.

• Journal of Biosystems Engineering
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• 제29권5호
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• pp.467-474
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• 2004

This study was to investigate the biomechanical characteristics of isoflavone-treated ovariectomized growing rat's femur. 4-week-old Wistar (female rats were randomly divided into 5 groups and assigned to sham(SH) group, and four ovariectomized groups consisting of one ovariectomized(OVX) group and genisetin(10 mg/kg b.w. )(OVX+G), daidzein(10 mg/kg b.w.)(OVX+D), and 17 $\beta$-estradiol(10 $\mu$g/kg b.w.)(OVX+ES) in AIN-76 modified diet for 8 weeks. The OVX groups gained more body weight than the SH group. Femoral weight was increased by feeding genistein and estradiol, whereas femoral length among groups was not significantly different. The breaking farce, stiffness, deformation, and energy values of the OVX group were lower than those of other groups. The stress, strain, and Young's modulus values of the OVX group were higher than those of other groups.

• Asian Pacific Journal of Cancer Prevention
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• 제17권11호
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• pp.4991-4998
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• 2016

Objective: This research was conducted to explore mechanisms behind the potency of quercetin in inhibiting colon cancer induced in an experimental model. Materials and Methods: Forty adult male rats of Wistar strain were distributed into 4 groups; a negative control group, a colon cancer bearing group, a quercetin-treated group and a 5-fluorouracil (5-FU)-treated group. Serum TAG72 and GAL3 levels were quantified by ELISA. Colonic Wnt5a and Axin-1 gene expression was estimated by PCR. In addition, colonic tissues were subjected to immunohistochemical examination of Bax expression and histological investigation of histopathological alterations. Results: Quercetin elicited significant reduction in serum TAG72 and GAL3 levels, in addition to significant suppression of colonic Wnt5a gene expression and amplification of colonic Axin-1 gene expression. Also, it caused moderate positive reaction for Bax in mucosal epithelium. Conclusion: The present research provides experimental evidence about the activity of quercetin in the colon cancer of rats. Inhibitory effects on cancer development might be ascribable to regulatory action on Wnt signaling and induction of apoptosis.

• 생명과학회지
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• 제5권2호
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• pp.1-1
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• 1995

Casein or soybean protein was subjected to there action with caffeic acidtyrosinase system at 30-35$\circ$C, pH 6.8 with aeration for 5hr. The resulting brown proteins were washed with acetone until the washings were on longer colored. However, modified protein still retained a light brown. The effects of the modified proteins and brown compounds on male Wistar strain rats were studied by pair-feeding of a cholesterol-free diet for 14days. Significant decrease in protein digestibility for the rats fed with the modified proteins were observed. Weight gain and protein digestibility were not influenced by feeding brown compounds, but the feeding of brown compound from casein caused an enlargement of caecum. The concentrations of serum cholesterol and triglyceride in the rats fed with modified proteins and brown compounds were mostly unchanged against the rats fed with untreated proteins. These results suggest that the decrease in protein digestibility induced by enzymic browning-reaction did not cause the decrease in concentration of serum cholesterol.

• 한국식품영양과학회지
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• 제5권1호
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• pp.1-9
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• 1976

The variations of growth gain and the composition of free amino acid levels in plasma and erythrocytes of young rats(wistar strain male) were determined by microbioassay method, feeding diets of rice group and 7% casein group as a control for three weeks. The results were as follows; 1. The growth gain of control diet group was higher than the rice diet group. 2. The contents of free tryptophan, lysine, and threonine levels in plasma and erythrocytes on rats of 7% casein group were higher than the rice group. 3. In the 7% casein diet group and the rice group, these free amino acids were included more in erythrocytes than in plasma. 4. Therefore, generally feeding by high protein score diet was included more Try, Lys, Thr in plasma and erythrocytes than feeding by low protein score diet. So the high and low of protein score was assumed by the contents of Try, Lys, Thr in plasma and erythrocytes on rats.