• Asian-Australasian Journal of Animal Sciences
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• 제19권9호
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• pp.1291-1297
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• 2006

The potential of the spot urine sampling technique as an alternative to performing a total urine collection to predict the microbial nitrogen supply was evaluated in crossbred bulls. In a completely randomized design, 20 growing crossbred bulls were assigned four levels of feed intake (120, 100, 80 and 60% of voluntary dry matter intake) on diets comprised of wheat straw and concentrate mixture (50:50). After three months of experimental feeding, a metabolism trial was conducted for ten days, during which spot urine collections were performed every 6 h post feeding on days 9 and 10. The daily urinary excretion of allantoin (A) and purine derivatives (PD) decreased with the reduction in feed intake while creatinine (C) excretion remained similar in animals fed at different levels. The microbial nitrogen (MN) supply calculated from the PD excreted in total urine (35.08 to 72.08 g/d) was higher at increased levels of feed intake. PD concentration in spot urine samples had poor correlation with feed intake except at 12 h post feeding. A/C ratio and PD/C ratio in spot urine samples remained similar irrespective of sampling time and significantly (p<0.01) correlated with daily urinary PD excretion, digestible organic matter intake and dry matter (DM) intake. However, no significant differences were evident in these ratios among animals fed at levels 120, 100 and 80% of voluntary dry matter intake (VDMI) at different times post feeding. These results suggests that the spot urine sampling technique to predict the microbial protein supply is not suitable for detecting small differences in MN supply and hence, estimation of PD excreted in total urine (mmol/d) is necessary to assess precisely the MN supply in crossbred bulls.

• Asian-Australasian Journal of Animal Sciences
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• 제12권1호
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• pp.36-41
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• 1999

An experiment was conducted to evaluate the effects of dietary Kemzyme, phytase, yeast and a combination of Kemzyme, phytase and yeast (KPY) supplementation on the growth performance, nutrient utilizability and the nutrients excretion in broiler chicks. Experimental diets based on corn-soybean meal were supplemented with 0.05% Kemzyme, 0.1% phytase, 0.1% yeast, 0.25% KPY (0.05% Kemzyme + 0.1% phytase + 0.1% yeast), respectively. Each treatment had six replicates of six male birds each. A total of 180 Arbor Ares broiler chicks were fed these diets for a period of six weeks. Numerically better body weight gain was found in chicks fed Kemzyme, phytase, yeast of KPY supplemented diet. Feed conversion rate was improved by the addition of KPY compared with control group (p < 0.05). Mortality was successfully reduced by supplementation of enzymes, yeast or a combination of enzymes and yeast. The excretions of N and P were considerably reduced by supplementation of dietary enzymes, yeast or combination of all three substances, especially for KPY fed group in starting period. The nutrient excretions in the finishing period were not significantly different. It appeared that the use of Kemzyme, phytase and yeast simultaneously had an additive effect on growth rate and nutrient excretion.

• Asian-Australasian Journal of Animal Sciences
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• 제13권6호
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• pp.795-801
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• 2000

A total of 120 growing crossbred pigs ($Landrace{\times}Large$ $White{\times}Duroc$) with equal numbers of barrows and gilts were used in the feeding trial in a $2{\times}3$ factorial arrangement (gender by feeding regimens) to investigate the effect of phase feeding on growth performance during the 25 to 58 kg body weight growth stage, and 6 pigs (three of each sex) were used in a metabolic trial. The growing period was divided into two phases and 4 different CP diets were used to make 3 different feeding regimens (GE18-GL18; 18% CP diets for both early and later growing period, GE18-GL16; 18% CP diet for early and 16% CP diet for later growing period, GE19-GL17; 19% CP diet for early and 17% CP diet for later growing period). There were no significant differences in growth performance among treatments during the entire growing period. However, during the later growing period, feed intake of barrows was significantly higher than that of gilts (p<0.05). Average daily gain of barrows was higher than that of gilts (p>0.05). Based on the result, growth performance differences between barrows and gilts appeared to begin after 40 kg of body weight. There was no significant difference in digestibility among treatments or between sexes. During the early growing period the 18% CP diet showed better digestibility than the 19% CP diet. However, during the later growing period, the 18% and 17% CP diets exhibited similar digestibilities, although 16% CP diet showed slightly lower digestibility than 18% and 17% CP diets. During the early growing period, fecal N and P excretion of pigs fed the 19% CP were higher than that of those fed the 18% CP diet. During later growing period, fecal N and P excretion by those receiving the two phase feeding compared to single phase feeding was reduced by 10.2% and 2.0%, respectively. In the gilts, the cost reduction by two phase feeding (GE18-GL16) compared to single feeding was around 3.81%, but that of barrows was only 0.52%. The results suggested that the same nutrient levels could be applied to barrows and gilts during the growing period. Also, this study suggested the optimum protein and lysine level for early and later growing pigs to be 18% CP, 1.0% lysine and 16% CP, 0.8% lysine, respectively. Feeding two diets to growing pigs, i.e., two-phase feeding, would be more appropriate than feeding a single diet on economic and environmental considerations.

• 한국축산시설환경학회지
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• 제6권3호
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• pp.141-151
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• 2000

Over-grown seaweeds in Donghae(east sea of Korea peninsula) may impedes ocean environment, however, they can be a good nutrient resources for poultry feeds if they are utilized properly. In this study, seaweeds powder were tested for laying hens\` ration to investigate the effects on egg production rate, egg quality and calcium phosphorus excretion. One hundred 65wks-old brown layers were fed for 5 weeks alotted with seaweeds powder addition to experimental diet by 0(control), 0.5, 1.0 and 2.0%, respectively, and obtained following results; 1. Seaweeds proved a mid-protein low-energy feed resources with planty of K, Na, Ca, Mg, Sr and Fe. 2. Seaweeds addition by 0.5% and 1.0% improved egg production rate and egg-mass output markedly(p<0.05) than control. Seaweeds addition did not alter cholesterol level of yolk and yolk index, however egg shell thickness showed increasing trend by increasing seaweeds addition level. 3. Protein absorption and digestibility in seaweed addition treatments were significantly higher(p<0.05) than control group and protein contents of excreta in 0.5% and 1.0% treatments were reduced(p<0.05), which suggests effective protein metabolism for egg production. Increasing seaweeds addition reduces Ca and P contents in rectum and excreta, suggesting Ca and P utilization improvement in laying hens and lessening soil pollution. 4. In conclusion, seaweeds addition in layers' diet by 1.0% level improves egg-mass production and might be egg quality by increasing metabolism of protein, calcium and phosphorus.

• 동아시아식생활학회지
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• 제4권2호
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• pp.9-16
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• 1994

This study was undertaken to investigate the effects of dietary low (Fe) levels on Fe metabolism of cadmium(Cd) poisoned rats. 40 male Sprague weaning Dawley rats weighing 80-90g were divided into 4 groups(LFe:low Fe, LFeCd:low Fe and Cd, AFe: adequate Fe, AFeCd: adequate Fe and Cd) according to Cd administration(0, 50ppm in drinking water) and Fe levels(Fe:6ppm, 40ppm in diet)for 12 weeks. The food intake and body weight gain of Cd group with low Fe(LFeCd) were significantly lower than those of without Cd group with adequate Fe(AFe)(p<0.01, P<0.05). But there was no significantly difference between Cd groups and without Cd groups in water intake. The blood levels of hemoglobin, hematocrit, and serum levels of Fe of LFeCd were significantly lower than those of AFe(p<0.01, p<0.05, p<0.001). The urinary and fecal excretion of Fe of LFeCd was significantly lower than that of AFe(p<0.05, p0.05). The levels of Fe of liver, spleen in LFeCd were lower than those of AFeCd(p<0.05, p<0.05). These results indicates that adequate iron supplementation to Cd pretreated rats induce protective effects on the reduction of Fe status by Cd poisoning.

• Natural Product Sciences
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• 제7권2호
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• pp.38-44
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• 2001

NAD(P)H:quinone reductase (QR), known as DT-diaphorase, is a kind of detoxifying phase II metabolic enzyme catalyzing hydroquinone formation by two electron reduction pathway from quinone type compounds, and thus facilitating excretion of quinoids from human body. With the usefulness of QR induction activity assay system for the modulation of toxicants, in the course of searching for cancer chemopreventive agents from natural products, the methanolic extracts of approximately two hundreds of oriental medicines were primarily evaluated using the induction potential of quinone reductase (QR) activity in cultured murine Hepa1c1c7 cells. As a result, several extracts including Hordeum vulgare, Momordica cochinchinensis, Strychnos ignatii, Houttuynia cordata, and Polygala japonica were found to significantly induce QR activity. In addition, the methylene chloride fraction of H. vulgare, one major dietary food source, showed potent induction of QR activity $(CD=6.4{\mu}g/ml)$. Further study for isolation of active principles from these lead extracts is warranted for the discovery of novel cancer chemopreventive agents.

• Asian-Australasian Journal of Animal Sciences
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• 제29권11호
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• pp.1616-1624
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• 2016

The aim of present experiment was to investigate the effect of protein reduction in commercial broiler chicken rations with incorporation of de-oiled rice bran (DORB) and supplementation of limiting amino acids (valine, isoleucine, and/or tryptophan) with ration formulation either on total amino acid (TAA) or standardized ileal digestible amino acids (SIDAA). The experimental design consisted of $T_1$, TAA control; $T_2$ and $T_3$, 0.75% and 1.5% protein reduction by 3% and 6% DORB incorporation, respectively by replacing soybean meal with supplemental limiting amino acids to meet TAA requirement; $T_4$, SIDAA control, $T_5$ and $T_6$, 0.75% and 1.5% protein reduction by DORB incorporation (3% and 6%) with supplemental limiting amino acids on SIDAA basis. A total of 360 dold fast growing broiler chicks (Vencobb-400) were divided into 36 homogenous groups of ten chicks each, and six dietary treatments described were allocated randomly with six replications. During 42 days trial, the feed intake was significantly (p<0.05) reduced by TAA factor compared to SIDAA factor and protein factor significantly (p<0.05) reduced the feed intake at 1.5% reduction compared to normal protein group. This was observed only during pre-starter phase but not thereafter. The cumulative body weight gain (BWG) was significantly (p<0.05) reduced in TAA formulations with protein step-down of 1.5% ($T_3$, 1,993 g) compared to control ($T_1$, 2,067 g), while under SIDAA formulations, BWG was not affected with protein reduction of 1.5% ($T_6$, 2,076 g) compared to $T_4$ (2,129 g). The feed conversion ratio (FCR) was significantly (p<0.05) reduced in both TAA and SIDAA formulations with 1.5% protein step-down ($T_3$, 1.741; $T_6$, 1.704) compared to respective controls ($T_1$, 1.696; $T_4$, 1.663). The SIDAA formulation revealed significantly (p<0.05) higher BWG (2,095 g) and better FCR (1.684) compared to TAA formulation (2,028 g; 1.721). Intake of crude protein and all limiting amino acids (SID basis) was higher in SIDAA group than TAA group with resultant higher nitrogen retention (4.438 vs 4.027 g/bird/d). The nitrogen excretion was minimized with 1.5% protein reduction (1.608 g/bird) compared to normal protein group (1.794 g/bird). The serum uric acid concentration was significantly reduced in $T_3$ (9.45 mg/dL) as compared to $T_4$ (10.75 mg/dL). All carcass parameters were significantly (p<0.05) higher in SIDAA formulation over TAA formulation and 1.5% protein reduction significantly reduced carcass, breast and thigh yields. In conclusion, the dietary protein can be reduced by 0.75% with TAA formulation and 1.5% with SIDAA formulation through DORB incorporation and supplementation of limiting amino acids and among formulations, SIDAA formulation was better than TAA formulation.

• 한국식생활문화학회지
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• 제23권1호
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• pp.55-61
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• 2008

Non processed onion (Allium cepa L.) powder or onion powder processed with ${\beta}-cyclodextrin+1%$ calcium chloride+1% soluble starch solution was added to the diet of 16 week old Wistar and spontaneously hypertensive rats (SHR) for 5 weeks. 36 SHR and Wistar rats were randomly divided into 3 diet groups, each of six. They were named control, NPO (non processed onion), PO (processed onion). The rats of the control group were fed diet without onion powder. To NPO and PO groups were added 5% of non processed onion and processed onion, respectively. Body weight gain, food efficiency ratio (FER), blood pressure, angiotensin converting enzyme (ACE) activity and Na excretion of urine and feces were analyzed. The processed onion and non processed onion diet reduced body weight gain without affeting the total food intake in Wistar rats (p<0.05). The body weight gain was lowest in Wistar rats fed with a diet with processed onion powder. The rats fed with diet containing PO or NPO had lower blood systolic blood pressure in SHR (p<0.05). The effect of onion powder on decreasing the blood pressure was not significant in Wistar rats. The ACE activity in lung was lowered in the SHR fed with either PO or NPO (p<0.05) compared to those fed with control diet. The urinary Na excretion was significantly lower in SHR than Wistar rats. The effects of PO and NPO on increasing the urinary and fecal excretion of Na were significant (p<0.05). These results suggest that onion processed with ${\beta}-cyclodextrin+1%$+1% calcium chloride+1% soluble starch solution to reduce volatile flavor, browning and caking preserves an antihypertensive effect of non processed onion.

• Journal of Nutrition and Health
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• 제43권5호
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• pp.433-442
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• 2010

본 연구는 여자대학생을 대상으로 장기간의 자율적 저염식 실시가 짠 맛에 대한 인지와 기호에 영향을 미쳐 나트륨 섭취나 혈압에 변화를 가져 올 수 있는지를 조사하고자 실시되었다. 14명의 실험군 대상자들은 나트륨 관련 영양교육과 정보를 제공받아 저염식을 하도록 지시 받았고 10명의 대상자는 평상시의 식생활을 유지하도록 하였다. 짠 맛의 인지와 기호는 9점 척도의 관능검사로 평가하였고 뇨 나트륨 배설량과 최적 염미 나트륨 정량 분석하였으며 혈압을 측정하였다. 주요 연구 결과는 아래와 같다. 1) 연구 시작시의 실험군과 대조군은 나트륨 관련 식행동, 신체 계측치, 혈압, 24시간 회상법에 의한 나트륨 섭취량, 6단계의 염분용액에 대한 짠 맛 인지나 기호에서 차이가 없었다. 2) 6개월의 저염식 실시 후 실험군 대상자들은 0.5% 이하 염분 용액에서 짠 맛 인지도가 높아졌고 대조군은 낮아져 저염식 실시로 낮은 농도의 염분에 적응한 듯하나 연구시작과 종료시의 paired t-test에서 통계적 유의성은 없었다. 기호도는 시작 시에는 두 군 모두 0.5% 염분 용액을 가장 선호했고 연구 종료시 대조군은 0.75%와 0.5% 염분 용액에 비슷한 기호도를 보인 반면 실험군은 0.5%, 그 다음으로 0.3% 용액에 높은 기호도를 보였으나 그 변화가 유의적 수준은 아니었다. 3) 최적 염미 나트륨 농도는 실험군에서 105.6 mmol에서 저염식 적응 후 80.7 mmol로 유의적 (p = 0.015) 감소를 보였고 대조군은 변화가 없었다. 뇨 나트륨 배설량은 대조군은 연구 시작과 종료시 차이가 없었고 실험군은 연구 종료시 1,398 mg에서 906 mg으로 유의적 감소를 하였다. 4) 수축기 혈압은 실험군 대상자에서 111 mmHg에서 106 mmHg로 유의적으로 감소하였고 이완기 혈압은 대조군, 실험군 모두에서 유의적으로 감소하였다. 혈압과 뇨 나트륨 배설량은 상관관계를 나타내지 않았다. 5) 최적 염미 나트륨 농도와 뇨 나트륨 배설량은 양의 상관관계 (r = 0.418)을 보여 짠맛에 대한 기호가 나트륨 섭취량에 영향을 미친 것으로 보인다. 최적 염미 나트륨 농도와 뇨 나트륨 배설량은 0.5% 이하의 낮은 염분 용액에 대한 짠 맛의 인지와는 음의 상관관계 (r = -0.338~-0.399)를 보여 저염식을 하는 대상자는 낮은 염도에도 잘 반응함을 보여 주었다. 본 연구의 대상자들은 6개월 간의 실험 경과 후 최적 염미도와 뇨 중 나트륨 배설량에서는 대조군과 실험군의 차이가 분명하였고 관능검사 결과는 0.5% 이하의 저염 농도에 실험군 대상자들이 짠 맛 인지와 기호도가 유의적이지는 않으나 향상하였다. 혈압은 수축기 혈압이 실험군에서만 유의적으로 감소하여 전반적으로 6개월 간의 저염식 적응이 유효한 듯하다. 그러나 본 연구결과만으로는 저염식에 적응해 가는 변화과정을 알 수 없고 분석 자료의 표준편차로 보아 개인차 커 일부 비적응자가 있었음을 알 수 있다. 앞으로 저염 적응 기간 중 개인별 반응과 함께 여러 시점에서의 관찰이 필요하다고 본다.

• 한국식품영양과학회지
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• 제25권6호
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• pp.1006-1015
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• 1996

본 연구는 폐경 후 여성에게 식이 칼슘염 형태, 에스트로겐 및 에스트로겐/칼슘 혼합요법이 칼슘, 인 및 질소 대사에 미치는 영향을 알아보고자 난소절제쥐를 이용한 총 9군으로 분류하여 6주간 사육한 후, 섭취량과 배설량을 측정하였고, 이로부터 흡수율과 평형상태를 구하였다. 난소를 절제한 군과 난소를 절제하지 않은 군에서의 칼슘 섭취량은 비슷하였으나 소변으로의 칼슘 배설이 난소를 절제한 군에서 유의하게 높았다. 난소절제 후 estrogen투여 및 estrogen/칼슘 혼합 투여군에서의 소변으로의 칼슘 배설량은 낮은 경향을 보였다. 대변으로의 칼슘 배설량은 난소를 절제한 군이 난소를 절제하지 않은군에 비해 유의하게 높았다(p<0.001). 난소절제 후 estrogen을 투여한 결과 대변으로의 칼슘 배설량은 감소하였다. 고칼슘을 투여한 군들 모두에서 대변으로의 칼슘 배설량이 현저히 높았다. 칼슘의 외견적 흡수율은 난소를 절제한 군에 비해 난소를 절제하지 않은 군이 유의하게 높았다. 난소절제 후 고칼슘을 투여한 군들에 비해 난소절제 후 estrogen을 투여한 군이 난소절제 군에 비해 외견적 흡수율이 증가하였다. 칼슘 평형은 난소절제 후 고칼슘을 투여한 군들에서 난소를 절제한 군 보다 유의하게 높은 양의 칼슘 평형상태를 보였다. 난소를 절제한 군과 난소를 절제하지 않은 군에서의 소변으로의 인 배설은 난소를 절제한 군이 다소 증가하였다. 난소절제 후에 고칼슘 투여, estrogen 투여, estrogen/칼슘 혼합 투여군에서의 소변으로의 인 배설이 유의하게 감소하였다(p<0.01). 난소를 절제한 군과 난소를 절제하지 않은 군에서의 대변으로 인 배설량은 난소를 절제한 군이 많았으며 난소절제 후 estrogen 투여군에서는 대변으로의 인 배설량이 다른 군 보다 적었다. 난소절제 후 고칼슘 투여군에서는 대변으로의 인 배설이 다소 증가한 경향이었다. 인의 평형상태도 난소를 절제하지 않은 군에서 유의하게 높았다. 난소절제 후 고칼슘 투여, estrogen 투여, estrogen/칼슘 혼합 투여 및 estrogen점진적 감소와 고칼슘 투여에 의한 효과로는 인의 평형이 다소 증가하였으나 난소를 절제하지 않은 군에 비해서는 평형이 현저히 낮았다. 난소를 절제한 군과 난소를 절제하지 않은 군에서 소변으로의 질소 배설량은 난소를 절제한 군에서 유의 하게 높았으며 난소절제 후 estrogen, estrogen/칼슘 혼합 투여, estrogen 점진적 감소와 칼슘 점진적 증가군에서 각각 배설량이 감소하였다. 대변으로의 질소 배설량은 난소를 절제한 군에서 유의하게 높았다. Estrogen투여에 의해 대변으로의 질소 배설이 감소하였다. 고칼슘 투여군들은 대변으로의 질소배설이 높았다. 이상의 성적으로 보아 난소절제로 인해 칼슘, 인, 질소 평형이 난소를 절제하지 않은 군에 비하여 낮아졌다. 난소를 절제한 군에 비해 난소절제 후 고칼슘 투여, estrogen/칼슘 혼합, estrogen 점진적 감소와 칼슘 점진적 증가군에서 칼슘 평형을 증가 시켰다. 그러나 인과 질소 평형에는 큰 영향을 미치지 않았다.