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      • KCI등재

        혈중 멜라토닌 혹은 에스트로겐과 광주기의 상호작용이 재래닭의 생산성에 미치는 영향

        류경선,강창원 한국가금학회 1997 韓國家禽學會誌 Vol.24 No.2

        An experiment was conducted to investigate the relationship between blood hormone levels and light cycle on performance of Korean native chicken. One hundred and two Korean native chickens were grouped into three treatments of natural light cycle (Control), 13L:11D (T2), and 16L:8D (T3). The egg production, egg weight, feed intake, serum melatonin and estrogen level were periodically measured from 22 to 34 weeks, respectively. The laying rates of T2 and T3 were significantly higher than that of the Control (P<o.05), except for the last period of the trial. There was no significant difference in laying rate between T2 and T3. The egg weight of T2 was significantly heavier than those of the Control and T3 for the first four wk, however, the egg weight of the Control was significantly heavier than the other treatments for the rest of periods (P<o.05). At 30 wk of age, the serum melatonin content of T3 was significantly higher than that of the Control, but there were no significant differences among treatments for the rest of experimental periods. It appears that the melatonin has a role in egg production of Korean native chicken. The blood estrogen level of T2 was also significantly high compared to those of the other groups at 26 and 30 wk of age(P<0.05), but was not different from the Control at 34 wk of age. The light stimulation may affect both blood hormone levels after the onset of laying in Korean native hens.

      • KCI등재

        생균제의 급여가 육계의 생산성과 장내 미생물의 변화에 미치는 영향

        류경선,박홍석 한국가금학회 1998 韓國家禽學會誌 Vol.25 No.1

        Two experiment were conducted to evaluate the feeding value of probiotics for the broiler chicks. Basal diets based on corn and soybean meal with no supplemental probiotics contained 21% dietary crude protein for the first 3 weeks and 19% for the rest of two weeks. In experiment 1, 0.2 % probiotics containing 2X 10 6 cfu /ml of Saccharomyces cerevisiae(S), Clostridium butyricum(C), Lactobacillus acidophilus(L), Bacillus polyfermenticus(B) were respectively supplemented to control groups. Two hundred day-olo chicks were randomly assigned to five treatments which had four replicates of 10 chicks each per treatment. Weight gain, feed consurnption, feed conversion ratio (FCR) were weekly measured for 5 weeks. The number of intestinal microflora was examined at the end of experiment. In experiment 1, Weight gain and feed intake of chicks fed probiotics exhibited a significant response compared to those of control for the first three weeks(P<0.01). Weight gain of S or C treatments was higher than that of control for the rest of two weeks, whereas it was significantly lower in L and B treatments than S or C treatments (P<0.01). Chicks fed S or C was significantly increased weight gain(P <0.05) compared to that of control at five weeks of age. FCR of C treatment seemed to improve relative to other supplemental probiotics groups, but was not significantly different. The number of intestinal anaerobes and Lactobacillus in large intestine of chicks fed probiotics supplements was significantly decreased compared to control groups(P<0.01). In experiment 2, there were six treatments: Ti, control; T2, 0.2%S; T3, 0.2%S + 0.2%C; T4, 0.2%S + 0.2%L; T5, 0.2%S + 0.2%B; T6, 0.2%S + 0.1%C + o.i%L + 0.1%B. Control diet based on corn soybean meal contained 21% CP and 3,2OOca1 /g ME with no probiotics. There were four replicates of 10 chicks each per treatment. Weight gain of chicks fed probiotics tended to increase compared to control groups, but were not significantly different between them. FCR was also improved in probiotics treatments. However, there were no significant differences between probiotics supplementation and control groups. The results of these experiments indicated that dietary supplemental probiotics improved weight gain, feed efficiency for the first three weeks of young broiler chicks, whereas supplementation of C, L, B combined probiotics to young broiler chicks was not superior to those of single or two probiotics.

      • KCI등재

        가금 원료사료의 새로운 엽산 분석방법과 어린 육계의 엽산과 메티오닌의 요구량에 관한 연구

        류경선,박강희,신원집 한국가금학회 1995 韓國家禽學會誌 Vol.22 No.3

        In Experiment 1, microbial assays were conducted on 57 feed ingredient samples to determine the content of total folic acid using Lactobacillus casei(ATCC 7469). Folic acid contents of feed samples pretreated with conjugase, ${\alpha}$-amylase, and a mixture of protease(Pronase)were corn, 09${\pm}$1.18($\pi$g${\pm}$SD); fish meal, 23.05${\pm}$1.27; milo, 29.34${\pm}$0.55; bakery meal, 25.80${\pm}$6.93; meat and bone meal, 56.76${\pm}$4.97; wheat middlings, 85.14${\pm}$2.56; and soybean meal, 193.97${\pm}$3.98. Experiments 2 and 3 were conducted to determine the effects of dietary supplemental folic acid and methionine on the performance of starting broiler chicks for 18 days. Four levels of dietary folic acid(0.24. 0.54,1.14 and 2.34mg/kg) and four levels of dietary methionine(0.45, 0.53,0.61, and 0.69%) were fed in a factorial design. The basal diet was based on corn, isolated soybean protein, meat and bone meal, and fish meal. It contained adequate amounts of all nutrients except methionine and folic acid in both experiments. Increased growth rate was observed in chicks fed the basal diet supplemented with either folic acid or methionine. Total dietary folic acid and methionine plus cysteine requirements for optimum growth were estimated to be 1.80 mg/kg and 0.89% in Experiment 2, and 1.47 mg/kg and 0.91% in Experiment 3, respectively. There were interactions between dietary folic acid and methionine on weight gain in both experiments. Chicks fed diets containing 2.34 mg folic acid /kg tended to display slow growth rate in both experiments. There was a significant linear feed conversion response to folic acid in Experiment 2, and a significant quadratic feed conversion resuonse to methionine in Experiment 3. There were both linear and quadratic liver folic acid responses to dietary folic acid in both experiments. There was no indication that dietary methionine had any effect on liver folic acid content. The incidence of tibial dyschondroplasia increased with increasing supplemental methionine, but were no significant differences detected at 5% level.

      • KCI등재

        육계 전기 사료에 엽산과 콜린의 첨가 수준이 육계의 생산성에 미치는 영향

        류경선,최호성,박강희,신원집 한국가금학회 1995 韓國家禽學會誌 Vol.22 No.4

        Five experiments were conducted to evaluate the effect of dietary supplemental folic acid(FA) in starting broiler chicks. In the first two experiments, basal diets based on corn and soybean meal contained 0.6 mg/kg FA but no supplemental methionine or choline. At 18 d of age, chicks showed curvilinear responses to folic acid supplementation with maximum growth and feed efficiencies at 1.45 mg/kg FA diet. The liver FA response was also curvilinear but reached a plateau at 1.70 mg/kg FA diet. The basal diet for 3 additional experiments contained soybean meal that had been washed with methanol to remove most of the choline. The diet contained only 0.6 mg /kg folic acid and 754 mg /kg choline. Chicks exhibited a larger growth response to folic acid at low choline levels as evidenced by a significant FA x choline interaction. FA supplementation increased but then decreased valgus leg deformity. Choline supplementation also decreased the incidences of valgus and varus leg deformities and decreased bone ash and increased the incidence of tibial dyschondroplasia. It is concluded that chicks fed diets based on practical ingredients require from 1.45 to 1.70 mg /kg FA diet and also 1.60 mg/kg FA when choline is offered near the NRC recommended level of 1,300 mg/kg.

      • KCI등재

        황기의 첨가.급여가 육계의 생산성 및 혈액의 성상과 육질에 미치는 영향

        류경선,강창원,송근섭,백승운 한국가금학회 1998 韓國家禽學會誌 Vol.25 No.4

        This experiment was conducted to investigate the effect of dietary supplemental Astragalus membranaceus on performance and meat quality of broiler chicks for 5 weeks. Basal diets based on corn and soybean meal contained 21% crude protein for the first three weeks and 19% for the rest of two weeks. Four levels of dietary Astragalus membranaceus(0, 0.25, 0.50, 1.00%) were fed in a one way design. There were four replicates of 50 chicks per treatment. Weight gain, feed intake, feed efficiency, blood component, breast meat lipid and protein were measured at the end of experiment. No increased growth rate was observed in chicks fed the basal diet supplemented with Astragalus membranaceus. Chicks fed the diet containing 0.5 and 1.00% Astragalus membranaceus tended to depress the growth rate. Feed intake of 0.25% Astragalus membranaceus treatment was significantly lower than control group(P<0.05), Dietary supplemental Astragalus membranaceus improved the feed efficiency compared to the control group, but was not significantly different between them. However, Astragalus membranaceus treatment exhibited decreased serum cholesterol and AST compared to those of control group, but was not significantly different between supplemental groups. Serum hematocrit, triglyceride, phosphate and BUN decreased at 0.25% Asparagus membranaceous supplementation. Growth hormone and IGF-1 (ng/ml) of chicks fed more than 0.50% Astragalus membranaceus significantly decreased compared to those of control(P<0.05). The total lipid and protein content of chicks fed 0.25 and 0.50% Astragalus membranaceus tended to increase, but did not show consistency at more than 0.50% supplement. The results of this experiment indicated that optimum dietary Astragalus membranaceus level to improve the performance and meat quality of broiler chicks may be less than 0.25%. 본 연구는 황기의 사료내 첨가·급여가 육계의 항병성, 생산성 및 계육의 품질에 미치는 영향을 구명하고자 시행하였다. 기초사료는 전기 3주와 후기 2주에 각각 21과 19% 수준의 조단백질이 함유되었다. 시험설계는 황기의 첨가수준을 0, 0.25, 0.50, 1.00%로 4개의 처리구로 하였고, 처리구당 4반복으로 하였으며, 반복당 50수씩 800수를 이용하였다. 증체량, 사료섭취량, 사료요구율은 5주동안 매주 측정하였고, 시험 종료시에 혈액의 성상 및 계육의 지방과 단백질함량을 조사하였다. 황기 첨가구는 대조구에 비하여 성장에 영향을 미치지 못하였으나, 사료섭취량은 대조구에 비하여 현저하게 감소하였고(P<0.05), 사료효율은 0.25%첨가구에서 개선되는 경향을 보였다. 육계용 사료에 황기의 첨가수준이 증가함에 따라서 혈청 콜레스테롤과 AST는 감소하였으며, 헤마토크릿, 지방, 인과 BUN의 수준은 0.25%첨가구에서 감소하였다. 혈청 GH와 IGF-1은 0.50과 1.00% 황기 급여구에서 대조구에 비하여 낮았다. 0.25와 0.50%황기 첨가구에서 가슴육의 지방과 단백질함량은 대조구에 비하여 증가하는 경향을 보였으나, 0.50%이상의 수준에서는 일관성이 없었다. 본 시험의 결과 육계용 사료에 황기의 적정 첨가수준은 0.25%이하에서 생산성과 항병성 및 계육의 품질을 개선할 수 있을 것으로 사료된다.

      • KCI등재

        생균제의 급여가 산란계의 생산성과 장내 미생물의 변화에 미치는 영향

        류경선,박흥석,류명선,박수영,김상호,송희종 한국가금학회 1999 韓國家禽學會誌 Vol.26 No.4

        The objects of this experiment was to investigate the effect of dietary several supplemental probiotics on performance and intestinal microflora of Lohmann brown laying hens from 68 to 80 weeks. Basal diets based on corn and soybean meal contained 18.0% CP and 2,720㎉/kg ME. Bacillus subtilis, Lactobacillus salvarius isolated from piglet(LSP) were fed at the level of 0.1 and 0.2% in a one way design. There were four replicates of 40 hens each per treatment. Egg production, feed intake, feed conversion ratio(FCR), eggshell quality were measured at every four weeks and intestinal microflora were examined at the end of experiment. Egg production of bird fed 0.2% individual probiotics was significantly higher than that of control(P 0.05). Birds fed the diet containing 0.2% LSC and LSP had significantly lower FCR than other treatments(P 0.05). However, egg weight of birds fed control and 0.2% BS diet showed higher than other treatments. Feed intake of 0.2% BS and 0.1% LSP treatment was significantly higher than other treatments, but was not consistency of all treatments(P 0.05). Eggshell breaking strength and thickness of hens fed probiotics tended to increase compared to that of control, but was not significantly different. Intestinal anaerobes, Lactobacillus spp. and yeast of hens fed all tested probiotics were significantly increased compared to those of control. The number of intestinal E. coli of all probiotics treatments except 0.1% LSP tended to decrease. Intestinal Lactobacillus spp. was increased significantly by 0.1% dietary LSC, whereas intestinal yeast showed significant increase in LSP treatments(P〈0.05). The results of this experiment indicated that feeding probiotics to laying hens improved the egg production, FCR and increased beneficial microflora.

      • KCI등재

        당귀 부산물의 급여가 재래닭의 생산성과 육질에 미치는 영향

        류경선,송근섭 한국가금학회 1999 韓國家禽學會誌 Vol.26 No.4

        The objective of this experiment was to investigate the effect of feeding Angelica gigas Nakai by-products on performance and meat quality of Korean native chicks(KNC). Five hundred forty KNC were placed into 0, 0.2, and 0.4% Angelica gigas supplements with four replications between males and females. Weight gain, feed conversion ratio(FCR), breast meat lipid, fatty acid and protein contents were measured from 17 to 20 weeks old. Egg production, feed intake and FCR were examined from 22 to 29 weeks at four weeks at four weeks intervals. Basal diets based on corn and soybean meal contained 15% crude protein and 2,850㎉/kg ME for the growing period, 16.5% and 2,800㎉/kg for the laying period. Experiments were designed in a one way analysis. Weight gain of female chicks fed 0.2% Angelica gigas by-products increased significantly compared to that of other treatments for the growing period, but was not consistency in male groups. Moisture, protein, fat content were not statistically different among all treatments. Fatty acid composition(C16:0, C18:0) of chicks fed 0.2% Angelica gigas by-products was higher than other treatments. In laying period, hens fed 0.2 or 0.4% Angelica gigas Nakai by-products seemed to increase the egg production and significantly improved FCR compared to that of control(P〈0.05). Birds fed 0.4% treatment showed significantly the lowest feed intake and FCR of all treatments(P〈0.05). The results of these studies indicated that dietary supplemental Angelica gigas by-products may have a role to improve the performance of KNC.

      • KCI우수등재

        산란계 사료에 목초액의 첨가 , 급여가 생산성 및 계란품질에 미치는 영향

        류경선,이홍룡 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.5

        This study was conducted to investigate the feeding various levels of wood vinegar for thirty six weeks on performance and egg quality of laying hens. Four hundred fifty of nineteen weeks old ISA Brown were divided into five treatments with five replications. Five levels of wood vinegar were supplemented with 0, 0.025, 0.050, 0.075 and 0.1%. Corn-Soy basal diet contained 18.0% CP, 2,800 ㎉/㎏. Eggs were collected and weighed every day. Egg production and feed conversion were recorded every four weeks. Eggshell breaking strength, thickness and Haugh Unit were measured every twelve weeks. Fatty acid composition, cholesterol contents of egg yolk were measured at 42 and 54 weeks old. Egg production was not statistically different between wood vinegar treatments and control. However, birds fed 0.75∼0.1% wood vinegar showed significantly higher egg production after reaching peak than control(P$lt;0.05). Egg weight of birds fed 0.025% wood vinegar tended to be higher than other treatments, but was not significance. Daily eggmass of 0.1% wood vinegar treatments was higher by 1.2g than control, but was not significantly different. Feed intake of control birds was highest of all treatments. Feed conversion was lowest in 0.1% wood vinegar treatments but was not significantly different. Egg quality and Haugh unit also showed no differences among treatments. There were no consistency in liver and abdominal fat to body ratio. Polyunsaturated fatty acid(PUFA: C20:4, C22:6) of egg yolk fed 0.1% wood vinegar were significantly higher than those fed the control(P$lt;0.05). The cholesterol levels of yolk and serum were not significantly different among treatments. However, they tended to be lower in 0.075% wood vinegar treatments. The results of this experiment indicated that 0.1% wood vinegar tended to improve the egg production compared to that of other treatments and significantly(P$lt;0.05%) increased PLJFA(C20:4, C22:6) content in egg yolk.

      • KCI등재

        치성 원인에 의한 경안면 감염에 대한 후향적 연구

        류경선,이현경,김도영,김무건,정태영,박상준,Ryu, Kyung-Sun,Lee, Hyun-Kyung,Kim, Do-Young,Kim, Moo-Gun,Jung, Tae-Young,Park, Sang-Jun 대한악안면성형재건외과학회 2013 Maxillofacial Plastic Reconstructive Surgery Vol.35 No.4

        Purpose: The objective of this retrospective study is to evaluate the factors affecting the spread of odontogenic infection. Furthermore, this study was performed to apply to future treatments. Methods: A total of 65 patients, who had received treatment for odontogenic infections from 2010 to 2012 for 3 years, were enrolled in this study. The causes of infection, presence of systemic disease, and complications, durations of treatment, treatment methods, and inflammation levels were compared with the data. Results: Patients over 70 years with systemic disease required immediate drainage, systemic antibiotic therapy and hospitalization. We can determine the direction of the early diagnosis and treatment through blood tests (white blood cells, neutrophil, C-reactive protein [CRP]) and computed tomography. Patients over 70 years with systemic disease had the highest percentage. In addition, these patients showed high levels of inflammation index, such as CRP average of 24.8 and needed for a long-term treatment period and a wide range of surgical incision & drainage several times. Systemic diseases, particularly diabetes mellitus and hypertension, accelerate the spread of infection and had a negative effect that delays healing. Eventually, five of the 65 patients showed serious systemic complications. Conclusion: When evaluating cervico-facial infected patients due to odontogenic infection, the most important thing is deciding the appropriate diagnosis and degree of disease. Considering the patient's systemic status and age, we need to decide the treatment plan. Especially, those patients over 70 years with systemic disease should be treated with rapid surgical approach, and the use of a wide range of antibiotics and intensive care. If proper treatment principle does not apply, severe life-threatening complications will result, such as necrotizing fascitis, acute airway obstruction, mediastinitis, and others.

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