• 한국자원식물학회지
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• 제17권3호
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• pp.283-288
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• 2004

시호내에 존재하는 간장기능증진에 효과적인 기능성 물질의 소재를 탐색하기 위한 기초연구의 일차실험으로 $CCl_4$에 의해 간장을 손상시킨 흰쥐에게 MeOH 시호추출물을 수준을 달리 하여 급여한 후 간 손상 치유 및 기능회복에 미치는 영향을 처리군 간에 비교, 검토했다. 그 결과, 혈중 AFP및 Total protein량은 시호추출물처리에 의해 감소했다 그러나 혈중 Albumin의 농도는 일정한 경향을 보여주지 않았다. 혈중 AST와 ALT의 활성치는 시호처 리 군에서 하락하였다. 혈중 ALP와 LDH의 활성치는 시호첨가군에서 감소했다 그러나 ${\gamma}$-G7의 활성치는 처리군간에 일정한 경향을 나타내지 않았다. 혈중 Total cholesterol과 Triglyceride량은 전 처리 군에서 유의한 차이를 보여 주지 않았다.

• Current Optics and Photonics
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• 제4권6호
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• pp.472-476
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• 2020

We have investigated the impact of optical filter bandwidth on the performance of all-optical automatic gain-controlled (AGC) erbium-doped fiber amplifiers (EDFAs). In principle, an optical bandpass filter (OBPF) should be placed within the feedback gain-clamping loop to set the lasing wavelength as well as the passband of the feedback amplified spontaneous emission (ASE) in all-optical AGC EDFA. From our measurement results, we found that the power level of feedback ASE with 0.1 nm passband of the optical filter was smaller than the ones with >0.2 nm passband cases. Therefore, the peak-to-peak power variation of the surviving channel with 0.1 nm passband was much larger than the ones with >0.2 nm passband. In addition, no significant difference in the power level of the feedback ASE was observed when the passband of the optical filter was ranging from 0.2 nm to 4.5 nm in our measurements. From these results, we have concluded that the passband of the optical filter should be slightly larger than 0.2 nm by taking into account the effect of feedback ASE power and the efficient use of the EDFA gain spectrum for the lasing ASE peak.

• 한국임상수의학회지
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• 제6권1호
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• pp.217-225
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• 1989

In order to develop the effective methods of electroacupuncture anesthesia to bovine species. eight animals of Korean native cow, which are healthy and have ordinary perception response. were examined to study on the acupuncture prescription. In the present study, six kinds of acupuncture prescription methods were applied with four kinds of meridian points which consist of Sam Yang Rack, Keuk Moon, Boo Yang and Sam Eum Kyo. The results are summarized as follows. 1. All kinds of methods applied here were simple in needling technique but considerably effective on analgesia. It was also confirmed that the methods could be applied to the all clinical signs, because these were not depended to vary on the position of operation area and the body restrain. 2. The results, which were obtained by applying to all meridian points at both legs selected by diagonal lines(e. g., right foreleg and left hind leg, and vice versa) and to all meridian points at the all legs, were revealed the same analgesia effect. However, the result applied to meridian points at one side of body did not show the good effect for analgesia. 3. When the acupuncture prescription was applied to Sam Yang Rack and Keuk Moon at both forelegs, and Boo Yang and Sam Eum Kyo at both hind-legs, the good effects of regional analgesia appeared at the anterior body and both forelegs, and the posterior body and both hind-legs, respectivery. 4. There was no sognificant difference in changing biochemical pictures of blood and serum during the experiment.

• 대한소아치과학회지
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• 제23권4호
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• pp.800-817
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• 1996

In this study, we tried to evaluate the effect of Amalgambond liner application on the degree of marginal leakage and retention of amalgam restoration by comparing with that of the Copalite and All-bond 2. The results obtained from this experiment were as follows; 1. Tensile strength representing the bond between amalgam and tooth structure was the highest in Amalgambond, and All-Bond 2, Copalite in descending order. There were statistically significant difference between each group(P<0.05). 2. The degree of microleakage in Amalgambond was lower than that of All-Bond 2, and Copalite, but no stastically significant difference could be found (P>0.05). 3. The liner such as Amalgambond or All-Bond 2 were evaluated to be superior to the conventional Copalite in bond strength as well as in microleakage. But the result of this study could not show the superiority of one material over the others; Amalgambond and All-bond 2. Besides the results of the study, other factors, such as practical convenience, should be considered in determining the selection of material. The support of welldesigned clinical studies on this subject are in demand.

• 혜화의학회지
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• 제8권1호
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• pp.659-674
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• 1999

The experimental studies were carried out in order to prove the effect of BSH water extract on Renal lipid peroxide content and metabolic enzyme system experimental studies about peroxide content, transferase, enzyme activity were carried out. The result were obtained as follows : 1. In the change of lipid peroxide of renal tissue, all group was decreased, more of two weeks was decreased. 2. In the Change of BUN of renal tissue, all group was decreased. 3. In the change of LDH of urine, all group was not significant. 4. In the change of ${\gamma}$-glutamyltransferasde, Xanthine oxidase, Aldehyde oxidase of urine, all group was decreased. 5. In the change of protein-bound SH, nonprotein-bound SH, glutathione, glutathione S-transferase, ${\gamma}$-Glutamylcystein synthetase of renal tissue, all group was increased. From above results, BSH was had significant effects on the senile, so it is expected to clinical application on senility and geratology.

• 한국광학회지
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• 제13권3호
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• pp.245-250
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• 2002

전광위상천이스위치(All-optical phase-shift switch)에서 백 펨토초이하의 펄스폭을 가지는 두 극초단 직교펄스의 전파특성을 수치적으로 연구하였다. 이러한 전광스위치에서 자기라만산란 및 상호라만산란과 walk-off 효과를 고려하여, 솔리톤펄스와 고차솔리톤펄스간의 복잡한 비선형상호작용이 펄스의 형태변화, 펄스의 위상천이분포, 그리고 대조비등의 스위칭특성에 끼치는 영향들을 분석하였다. 특히 스위칭을 위해 필요한 walk-of f효과를 라만 walk-off효과에서 얻을 수 있기 때문에, 이러한 전광스위치에 전형적인 복굴절률(Δn = 2.4$\times$$10^{-5}$)을 가지는 광섬유를 사용해도 좋은 스위칭특성을 가짐을 보였다.

• 보건교육건강증진학회지
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• 제2권1호
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• pp.107-112
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• 1984

In order to develop the school dental health care in rural area, the author collected data about the population of all 6-17 year students living in Young dong-gun county, and Surveyed their dental health cares during one year of 1982. From the collected data, several dental health indices such as percentage of students of all population, percentage of students who visited dentists once or more during one year, average annual dentist visit and average annual dental treatment case were calculated and discussed. The obtained results were as follows; 1. The percentage of students of all population in Young dong-gun county was 29.65%. 2. The percentage of students who visited dentists once or more during one year was 4.67%. 3. The average annual dentist visit per student was 0.11. 4. The average annual dental treatment case per student was 0.16. 5. The oral examination case was 0.05, intraoral radiograph 0.01, oral prophylaxis 0.00, filling of dental carious lesion 0.02, pulp treatment 0.02, extraction of teeth 0.04, and others 0.02 annually in the average. In comparison with detectable need for dental treatment cases, oral prophylaxis was not supplied at all, filling of dental carious lesion was supplied about 1% and extraction of teeth was supplied about 10% of detectable need. 6. It was recommended that school incremental dental care project should be developed for school dental health programme in order to supply all of the detectable need for dental treatment.

• 한국식품영양과학회지
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• 제25권3호
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• pp.384-391
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• 1996

This study was designed to investigate effects of lobster shrimp chitosan on serum and liver lipid levels in rats fed high fat and cholesterol diets. Male Sprague-Dawley rats of 4-weeks old, weighing 70$\pm$5g, were fed experimental diets for 3 weeks: basal diet+5% cellulose(group 1), high lipid diet+5% cellulose(group 2, control group), high lipid diet+5% balloon flower root(group 3), high lipid diet+5% cellulose(group 4, high lipid diet+5% lobster shrimp chitosan(group 5). Concentrations of total cholesterol, HDL-cholesterol, LDL-cholesterol, free cholesterol, cholesteryl ester, triglyceride, phospholipid in serum and liver were determined. The results obtained were as followes: Serum total cholesterol concentration were significantly reduced in all supplemented group compared with control. HDL-cholesterol concentrations were higher in groups 1, 4, and 5 and the ratios of HDL-cholesterol to total cholesterol concentration were higher in groups 1, 4, while the atherogenic-indices were lower in groups 1, and 4 than control. Concentrations of LDL, LDL-cholesterol and free cholesterol, cholesteryl ester were significantly lower in all supplemented groups than the control group. Concentrations of phospholipid and triglyceride were lower in groups 3, 4, 5, while activities of GPT and GOT were significantly lower in groups 4, 5 than the other group. Concentrations of calcium, magnesium and phosphorous were high in all treatment groups compared to the control group. Liver contents of total cholesterol, free cholesterol and cholesteryl ester were lower in the groups 1, 3, 4, and 5 than in the control group, especially lower in groups 1, and 5. Liver triglyceride and phospholipid concentrations were significantly lower in the groups 1, and 5 than in the other groups. The results from the data suggested that the experimental diet containing 5% lobster shrimp chitosan was effective to reduce the serum and liver lipids.

• 한국초지조사료학회지
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• 제14권4호
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• pp.257-263
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• 1994

The experiment was canied out to investigate the effects of cutting frequencies (3, 4 and 5 cuts per year) in relation to fertilization of mineral nitrogen on crude protein yield and the contents of crude protein and acid detergent fibre in orchardgms(Dacty1is glomerata L.). Tne results are as follows : 1. The content of crude protein increased according to the increase in cutting frequency and showed the highest in the 1st cut in all treatments. At 4 and 5 cutting frequencies per year, the content of crude protein increased in a large extent according to the increased fertilization of mineral nitrogen. However at 3 cutting frequency, the content of cmde protein appeared higher for no application of mineral nitrogen than for the treatments with fertilization. 2. 'Ihe content of acid detergent fibre(ADF) was considerably reduced at 4 and 5 cutting frequencies and in all treatments, the lowest were recorded in the 1st cut or in the last cut. At 3, 4 and 5 cutting frequencies, the highest ADF were shown in the 2nd cut, 3rd cut and 3rd cut respectively. However, the general trend was that the content of ADF was greatly reduced according to increased level of mineral nitrogen fertilization. 3. The yeild of cmde protein was the highest at 5 cutting frequency(l.2 ton DMIha) and it indicated that the yield of cmde protein increased in accordance to the increase in fertilization of mineral nitrogen and cutting frequency. 4. In all treatments, positive correlation(p<0.001) between the yeilds of crude protein and annual dry matter yield appeared. Negative correIation(p

• Transactions on Electrical and Electronic Materials
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• 제13권1호
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• pp.39-42
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• 2012

To study the physical and chemical properties, solid solutions of $(Sr_{1-x}Ba_x)NdFe{^{3+}}_{1-\tau}Fe{^{4+}}_{\tau}O_{4-y}$ system with x=0.0(SBN-0), 0.1(SBN-1), 0.2(SBN-2) and 0.3(SBN-3) were synthesized in air at 1,473 K and annealed in air at 1,073 K for 24 h. X-ray powder diffraction assured that the four samples had tetragonal symmetries (I4/mmm). Their lattice volumes increased gradually with x values. Nonstoichiometric chemical formulas were formulated using the data such as $\tau$(amount of $Fe^{4+}$ ion) and y(oxygen deficiency) values using Mohr salt analysis. It was found out that all the four samples had excessive oxygen (4-y>4.0). All the samples started to lose some of their oxygen at around 613K(TG/DTA thermal analysis). They exhibited semiconductivities in the temperature range of around 283-1173K. All the four specimens had sufficient tensile strength to endure the force of 19.6 N (2 kg of weights) and the conductivity values of the ECIAs which were painted on pieces of glass with the area of $150mm^2$ ($10mm{\times}15mm$) and it was in the order of ECIA-0${\rightarrow}$ECIA-1${\rightarrow}$ECIA-2${\rightarrow}$ECIA-3 at a constant temperature.