• Journal of Nutrition and Health
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• 제8권1호
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• pp.15-37
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• 1975

I. Subject of the study A study on the nutritive value and utilization of powdered seaweeds. II. Purpose and Importance of the study A. In Korea the shortage of food will be inevitable by the rapidly growing population. It will be very important study to develop a new food from the seaweeds which were not used hitherto for human consumption. B. The several kinds of seaweeds have been used by man in Korea mainly as side-dishes. However, a properly powdered seaweed will enable itself to be a good supplement or mixture to certain cereal flours. C. By adding the powdered seaweed to any cereals which have long been staple foods in this country the two fold benefits; saving of cereals and change of dietary pattern, will be secured. III. Objects and scope of the study A. Objects of the study The objects will come under four items. 1. To develop a powdered seaweed as a new food from the seaweeds which have been not used for human consumption. 2. To evaluate the nutritional quality of the products the analysis for chemical composition and animal feeding experiment will be conducted. 3. Experimental cocking and accepability test will be conducted for the powdered products to evaluate the value as food stuff. 4. Sanitary test and also economical analysis will be conducted for the powdered products. B. Scope of the study 1. Production of seaweed powders Sargassum fulvellum growing in eastern coast and Sargassum patens C.A. in southern coast were used as the material for the powders. These algae, which have been not used for human consumption, were pulverized through the processes of washing, drying, pulverization, etc. 2. Nutritional experiments a. Chemical composition Proximate components (water, protein, fat, cellulose, sugar, ash, salt), minerals (calcium, phosphorus, iron, iodine), vitamins (A, $B_1,\;B_2$ niacin, C) and amino acids were analyzed for the seaweed powders. b. Animal feeding experiment Weaning 160 rats (80 male and 80 female rats) were used as experimental animals, dividing them into 16 groups, 10 rats each group. Each group was fed for 12 weeks on cereal diet (Wheat flour, rice powder, barley powder, potato powder, corn flour) with the supplementary levels of 5%, 10%, 15%, 20% and 30% of the seaweed powder. After the feeding the growth, feed efficiency ratio, protain efficiency ratio and ,organs weights were checked and urine analysis, feces analysis and serum analysis were also conducted. 3. Experimental cooking and acceptability test a. Several basic studies were conducted to find the characteristics of the seaweed powder. b. 17 kinds of Korean dishes and 9 kinds of foreign dishes were prepared with cereal flours (wheat, rice, barley, potato, corn) with the supplementary levels of 5%, 10%, 15%, 20% and 30% of the seaweed powder. c. Acceptability test for the dishes was conducted according to plank's Form. 4. Sanitary test The heavy metals (Cd, Pb, As, Hg) in the seaweed powders were determined. 5. Economical analysis The retail price of the seaweed powder was compared with those of other cereals in the market. And also economical analysis was made from the nutritional point of view, calculating the body weight gained in grams per unit price of each feeding diet. IV. Results of the study and the suggestion for application A. Chemical composition 1. There is no any big difference in proximate components between powders of Sargassum fulvellum in eastern coast and Sargassum patens C.A. in southern coast. Seasonal difference is also not significant. Higher levels of protein, cellulose, ash and salt were found in the powders compared with common cereal foods. 2. The levels of calcium (Ca) and iron (Fe) in the powders were significantly higher than common cereal foods and also rich in iodine (I). Existence of vitamin A and vitamin C in the Powders is different point from cereal foods. Vitamin $B_1\;and\;B_2$ are also relatively rich in the powders.'Vitamin A in ·Sargassum fulvellum is high and the levels of some minerals and vitamins are seemed4 to be some influenced by seasons. 3. In the amino acid composition methionine, isoleucine, Iysine and valine are limiting amino acids. The protein qualities of Sargassum fulvellum and Sargassum patens C.A. are seemed to be .almost same and generally ·good. Seasonal difference in amino acid composition was found. B. Animal feeding experiment 1. The best growth was found at.10% supplemental level of the seaweed Powder and lower growth rate was shown at 30% level. 2. It was shown that 15% supplemental level of the Seaweed powder seems to fulfil, to some extent the mineral requirement of the animals. 3. No any changes were found in organs development except that, in kidney, there found decreasing in weight by increasing the supplemental level of the seaweed powder. 4. There is no any significant changes in nitrogen retention, serum cholesterol, serum calcium and urinary calcium in each supplemental level of the seaweed powder. 5. In animal feeding experiment it was concluded that $5%{\sim}15%$ levels supplementation of the seaweed powder are possible. C. Experimental cooking and acceptability test 1. The seaweed powder showed to be utilized more excellently in foreign cookings than in Korean cookings. Higher supplemental level of seaweed was passible in foreign cookings. 2. Hae-Jo-Kang and Jeon-Byung were more excellent than Song-Pyun, wheat cake, Soo-Je-Bee and wheat noodle. Hae-Je-Kang was excellent in its quality even as high as 5% supplemental level. 3. The higher levels of supplementation were used the more sticky cooking products were obtained. Song-Pyun and wheat cake were palatable and lustrous in 2% supplementation level. 4. In drop cookie the higher levels of supplementation, the more crisp product was obtained, compared with other cookies. 5. Corn cake, thin rice gruel, rice gruel and potato Jeon-Byung were more excellent in their quality than potato Man-Doo and potato noodle. Corn cake, thin rice gruel and rice gruel were excellent even as high as 5% supplementation level. 6. In several cooking Porducts some seaweed-oder was perceived in case of 3% or more levels of supplementation. This may be much diminished by the use of proper condiments. D. Sanitary test It seems that there is no any heavy metals (Cd, Pb, As, Hg) problem in these seaweed Powders in case these Powders are used as supplements to any cereal flours E. Economical analysis The price of the seaweed powder is lower than those of other cereals and that may be more lowered when mass production of the seaweed powder is made in future. The supplement of the seaweed powder to any cereals is also economical with the criterion of animal growth rate. F. It is recommended that these seaweed powders should be developed and used as supplement to any cereal flours or used as other food material. By doing so, both saving of cereals and improvement of individual's nutrition will greatly be achieved. It is also recommended that the feeding experiment for men would be conducted in future.

• 한국초지조사료학회지
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• 제4권3호
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• pp.226-234
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• 1984

Italian ryegrass의 종자생산(種子生産)을 위한 파종적기(播種適期)와 파종적량(播種適量)을 구명(究明)하기 위하여 4배체품종인 Tetrone을 공시(供試)하여 $'83.\;8.\;20.{\sim}9.\;25.$까지 10일간격(日間隔)으로 5개(個) 파종기(播種期)와 $1{\sim}4kg/10a$의 4개(個) 수준(水準)의 파종량(播種量)으로 분할구(分割區) 배치(配置) 3 반복(反覆) 시험(試驗)한바 그 결과(結果)를 요약(要約)하면 아래와 같다. 1. 월동전(越冬前)에 형성(形成)된 약자(藥子)를 동사면(凍死面)에서 볼때 완전동사(完全凍死), 기부(基部)는 생존(生存)하고 생장점(生長点) 동사(凍死),그리고 생장점(生長点)도 동사(凍死)하지 않은 것 3군(群)으로 구분(區分)할 수 있었다. 2. 9월(月) 9 일이전(日以前) 파종(播種)은 월동전(越冬前) 생육량(生育量)이 과다(果多)하여 추위에 약(弱)하였고 분약시원체가 엽초내에 생존(生存)해 있어도 모체의 고엽량(枯葉量)이 많아 봄에 출현(出現)이 늦고 따라서 출수(出穗)가 늦으며 간장(稈長)도 짧고 종자수량(種子收量)도 저조(低調)하였다. 3. 생육(生育)이 중용(中庸)인 것 중에서 생장점(生長点)은 동해(凍害)를 받았으나 하부(下部)가 생존(生存)해 있고 동해(凍害)를 받지 않은 것에서는 하부절(下部節)의 분약시원체가 발육(發育), 일찍 출현(出現)하여 이것들의 대부분(大部分)이 유효경이 되었다. 4. 간장(稈長)과 수장(穗長) 그리고 이삭의 숙기(熟期)는 파종기(播種期), 파종량(播種量)의 영향(影響)보다도 약자출현기(藥子出現期)의 영향(影響)이 더컸다. 5. 종자수량(種子收量) 구성요인(構成要因)중 단위면적당(單位面積當) 이삭수가 수량(收量)에 제일 크게 영향(影響)을 미쳤다. 6. 월동(越冬)을 잘시켜 종자(種子) 생산년도(生産年度)에 단위면적당(單位面積當) 충분(充分)한 이삭수를 확보(確保)하여 수량(收量)을 높이기 위해서는 수원지방(水原地方)에 파종적기(播種適期)는 9월(月) 하순(下旬)이었고 파종량(播種量)은 10a당(當) 2-3 kg였다. 특(特)히 파종적기내(播種適期內)에서 일찍 파종(播種)할 때는 2kg/10a 늦게 파종(播種)할 때는 3kg/10a가 좋았다.

• 혜화의학회지
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• 제8권2호
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• pp.107-122
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• 2000

As a result of studing on the "shashen(沙蔘)", we could reach conclusions as follows. 1. Shashen is the root of "lunyeshashen(潤葉沙蔘)", "kuoyeshashen(闊葉沙蔘)", and its same generic plants that belong to Companulaceae. In china people has used twenty-four species as a shashen together with other generic plants, in korea sixteen species as a shashen. 2. At first, in the "Shen Nong's Herbal(神農本草經)" it was recorded and then in the "Benchingfengyuan(本經逢原)" divided into "nanshashen(南沙蔘)" and "beishashen(北沙蔘)". Recently, nanshashen called shashen belongs to Companulaceae and have strong efficacies of clearing away heat from lung, resolving phlegm, beishashen belongs to Umbelliferae and have strong efficacies of nourishing stomach, nourishing yin. 3. Shashen is the root of Adenophora stricta Miq., and yangru(羊乳) is that of Codonopsis lauceolata Bentham et Hooker, jini is that of Adenophora remotiflora (SIEBOLD et ZUCCARINI.) MIQUEL. From a efficacious point of view, it is the characteristics that shashen have efficacies of nourishing yin and clearing away heat from lung, supplementing stomach and promoting production of body fluid, resolving phlegm and relieving cough, eliminating pus and abscess, expelling wind and pruritus, jini have those of clearing away heat and toxic material, resolving phlegm and yanru have those of nourishing yin and moistening lung, resolving phlegm and eliminating pus, clearing away heat and toxic material, stimulating milk secretion. 4. After being recorded as "zhimu(知母)" in Shen Nong's Herbal, the alias of shashen was recorded as kuxin(苦心), shimei(識美), huxu(虎須), baishen(白參), zhiqu(志取), wenhu(文虎), baolishen(保利參), paoshen(泡參), jibantui(鷄半腿), yangponai(羊婆妨) and so on. Moreover shashen was named after its characteristics of that it grows well in the sandy soil and as a wushen(五參) with a renshen(人蔘) its form is different from that of wushen but their chief virtues are alike. 5. In the numerous medical books, xinyeshashen(杏葉沙蔘) regarded as nanshashen. It was called as the alias of jini, so I thouhgt that it was wrong xinyeshashen to be regarded as nanshashen. 6. It was used shashen for renshen, renshen was used to treat lung-cold syndrome by its efficacy of tonifying yang and shashen lung-heat syndrome by its efficacy of nourishing yin, the reasons of that because shashen had amount of sap, its properies and flavours of herbs are light and clean. 7. The constituents of shashen were essential oil, starch, shashen-saponin, furocoumarin, xanthotoxin(ammoidin), inulin, sugar, mucus and have efficacies of resolving phlegm, promoting production of body fluid, immunomodulational and antibiotic efficacies. above results indicated that the origin of shashen and substitutional plants was various. Their efficacies are somewhat alike, but there were characteristic efficacies each other. Nowadays they are used together with, so we should know the characteristic efficacies of them and then we using them clinically, more deep discrimination and experimental support shoud be accomplished.

• 대한치과보철학회지
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• 제41권4호
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• pp.421-439
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• 2003

Statement of problem : It is difficult to obtain a good titanium casting body using the traditional sprue design because of high melting point of Ti, and the low fluidity and high reactivity of molten Ti. Purpose : A new sprue design for titanium casting bodies needs more trial and error. In order to decrease the number of trial and error, computer simulation(MAGMASOFT, Magmasoft Giessereitechnologie GmbH, Achen, Germany) was used to optimize sprue design in U-shaped implant superstructures. Material and method : Five kinds of sprue were examined for the design of the sprue former for titanium casting: Sprue design A(sprue length 4 mm, rectangular shape, 4 sprues), Sprue design B(sprue length 4 mm. round shape. radius 2 mm, 7 sprues), Sprue design C (sprue length 2 mm, round shape, radius 2 mm, 7 sprues). Sprue design D (sprue length 2 mm, cone shape, large radius 3mm. small radius 2mm, 7 sprues), and Sprue design E( sprue length 2 mm. one unit channel shape). Sprue design F(sprue length 2mm, one unit channel shape) was also examined for the design of the customized sprue former in the Biotan system(Schutz Dental Gmbh, Germany). The casting bodies were taken in Sprue design A, Sprue design D, Sprue design E, and Sprue design F in the Biotan casting system. The numerically predicted defects were compared with the experimental dental castings by the radiographic and sectional view observations. Results : 1. According to the result of computer simulation, turbulence during mold filling was decreased in the sequence of Sprue design F, Sprue design E, Sprue design D, Sprue design C, Sprue design B, and Sprue design A. 2. The calculated solidification time contours indicate that hot spot was moved from the casting body to the sprue button in the sequence of Sprue design A, Sprue design B, Sprue design C, Sprue design D, and Sprue design E. The filling pattern of Sprue design F was similar to that of Sprue design E. 3 The predicted filling pattern shows that less turbulence was found in the customized sprue former than in the standard sprue former. 4. According to the results of the radiographic and cross sectional observations, casting defects less than 1mm were found at the center of a casting body with Sprue design E and Sprue design F. However, larger casting defects of 4mm were found in a casting with Sprue design A. 5. The predicted casting porosity was similar to that of the real casting. Conclusion : One unit channel-type and customized sprue former can be recommended. Further research and developement of various sprue designs using computer simulation in necessary to optimize casting design, in order to reduce the formation of casting defects in implant titanuim super-structures.

• 한국환경과학회지
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• 제20권10호
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• pp.1273-1284
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• 2011

The aim of this research was to evaluate the performance of insoluble electrode for the purpose of degradation of Rhodamine B (RhB) and oxidants generation [N,N-Dimethyl-4-nitrosoaniline (RNO, indicator of OH radical), $O_3$, $H_2O_2$, free Cl, $ClO_2$)]. Methods: Four kinds of electrodes were used for comparison: DSA (dimensional stable anode; Pt and JP202 electrode), Pb and boron doping diamond (BDD) electrode. The effect of applied current (0.5~2.5 A), electrolyte type (NaCl, KCl and $Na_2SO_4$) and electrolyte concentration (0.5~3.5 g/L) on the RNO degradation were evaluated. Experimental results showed that the order of RhB removal efficiency lie in: JP202 > Pb > BDD ${\fallingdotseq}$ > Pt. However, when concerned the electric power on maintaining current of 1 A during electrolysis reaction, the order of RhB removal efficiency was changed: JP202 > Pt ${\fallingdotseq}$ Pb > BDD. The total generated oxidants ($H_2O_2$, $O_3$, free Cl, $ClO_2$) concentration of 4 electrodes was Pt (6.04 mg/W) > JP202 (4.81 mg/W) > Pb (3.61 mg/W) > BDD (1.54 mg/W), respectively. JP202 electrode was the best electrode among 4 electrodes from the point of view of performance and energy consumption. Regardless of the type of electrode, RNO removal of NaCl and KCl (chlorine type electrolyte) were higher than that of the $Na_2SO_4$ (sulfuric type electrolyte) RNO removal. Except BDD electrode, RhB degradation and creation tendency of oxidants such as $H_2O_2$, $O_3$, free Cl and $ClO_2$, found that do not match. RNO degradation tendency were considered a simple way to decide the method which is simple it will be able to determinate the electrode where the organic matter decomposition performance is superior. As the added NaCl concentration was increases, the of hydrogen peroxide and ozone concentration increases, and this was thought to increase the quantity of OH radical.

• 한국해양공학회지
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• 제28권4호
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• pp.356-362
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• 2014

Wear and corrosion of the engine parts surrounded with combustion chamber is more serious compared to the other parts of the engine because temperature of the exhaust gas in a combustion chamber is getting higher and higher with increasing of using the heavy oil of low quality. Therefore, an optimum repair weldment as well as an available choice of the base metal for these parts are very important to prolong their lifetime in a economical point of view. It reported that there was an experimental result for repair weldment on the forged steel which would be generally used with piston crown material, however, it is considered that there is no study for the repair weldment on the cast steel of piston crown material. In this study, four types of electrodes such as 1.25Cr-0.5Mo, 0.5Mo Inconel 625 and 718 were welded with SMAW and GTAW methods on the cast steel which would be generally used with piston crown material. And the corrosion properties of weld metal, heat affected zone and base metal were investigated using electrochemical methods such as measurement of corrosion potential, anodic polarization curves, cyclic voltammogram and impedance etc. in 35% $H_2SO_4$ solution. In the cases of Inconel 625, 718, the weld metals and base metals exhibited the best and worst corrosion resistance respectively, however, 1.25Cr-0.5Mo and 0.5Mo indicated that corrosion resistance of the base metal was better than the weld metal. And the weld metal welded with electrodes of Inconel 625 revealed the best corrosion resistance among the electrodes, and Inconel 718 followed the Inconel 625. Hardness relatively also indicated higher value in the weld metal compared to heat affected zone and base metal. In particular, Inconel 718 indicated the highest value of hardness compared to other electrodes in the heat affected zone.

• 대한치과교정학회지
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• 제38권3호
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• pp.149-158
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• 2008

본 연구는 미니 임플란트 식립 후 교정력 부하시기와 관련하여 임플란트 주위골의 치유과정을 조사하였다. 성견 8마리의 하악 협측골에 교정용 미니 임플란트(ORLUS, Ortholution CO, Korea) 48개를 식립한 후 교정력을 주지 않은 대조군과 식립 후 즉시 교정력을 준 즉시 부하군, 그리고 식립 후 3주간의 치유기간을 두고 교정력을 준 지연 부하군으로 나누어 각각의 군에 대해 3주, 6주, 12주가 경과된 시점에 임플란트 주위골의 변화를 조직 계측학적으로 관찰하였다. 골 접촉률은 즉시 부하군에서 시기에 따른 유의한 변화가 없었으며 지연 부하군은 3주에 비해 12주에서 유의하게 증가하였다(p<0.05). 각 시점에서 군간의 골 접촉률을 비교했을 때 12주째 지연 부하군이 즉시 부하군 보다 유의하게 높았다(p<0.05). 골 면적비율은 즉시 부하군의 경우, 시기에 따른 유의한 변화가 없었으며, 지연 부하군과 대조군은 6주에 비해 12주째 유의한 증가를 보였으며 (p<0.05), 12주째 실험군 간에 유의한 차이는 관찰되지 않았다(p>0.05). 동요도는 12주째 즉시 부하군과 지연 부하군 간에 유의한 차이는 없었다(p>0.05). 위의 결과에서 즉시 부하가 self drilling형 미니 임플란트 주위골의 안정성에 부정적인 영향을 주지 않았으므로 식립 즉시 교정력을 부여하여 사용하는 데 임상적으로 문제가 없을 것으로 판단된다.

• 한국건설순환자원학회논문집
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• 제8권1호
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• pp.26-32
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• 2020

건설자원의 고갈과 콘크리트 폐기물의 증가에 따라 콘크리트 재활용은 선택적 사항이라기보다는 필수적 사항으로 되어 가고 있다. 콘크리트 재활용에 대한 연구는 오래 동안 다양한 관점에서 수행되어 왔다. 그러나 여러 나라의 기준이나 권고사항을 보면 순환골재 콘크리트의 적용에는 순환골재의 비율이나 순환잔골재의 사용금지 등과 같은 많은 제한사항이 있다. 본 연구에서는 구조부재에서 천연골재 콘크리트와 순환골재 콘크리트를 분리타설하는 방법에 대한 적절성을 알아보고자 하였다. 순환골재콘크리트의 제작 시 굵은골재의 치환비율은 50, 100%로 하였고 두 콘크리트의 접합면에는 교섭을 도입하였다. 순환골재 콘크리트를 제작하는 과정에서 순환골재를 처리하거나 혼화재를 첨가하지 않았다. 두 콘크리트 접합면의 전단강도를 평가하기 위해 등분포하중으로 재하한 2면전단 시험법을 채택하였다. 실험결과에 따르면 골재치환율이 큰 시험체가 전단강도 대 압축강도 비가 크게 나왔는데 이는 굵은골재의 크기와 전단절단면의 조도에 기인한 것으로 보인다. 여러 가지 변수들의 영향을 알아보기 위한 후속연구가 필요하며 그와 같은 연구 활동을 진행 중이다.

• 대한기계학회논문집B
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• 제34권4호
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• pp.409-416
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• 2010

순산소 연소와 배가스 재순환(FGR : Flue Gas Recirculation) 기술은 $CO_2$ 저감 목적으로 많은 연구자들의 관심을 받아왔다. 본 연구는 다공 동축 버너를 이용하여 산소 공급비(OFR : Oxygen Feeding Ratio)에 따른 순산소 연소 특성과 동일 조건에서 FGR 시스템을 모사하기 위하여 공급 위치에 따른 $CO_2$ 첨가 효과의 특성을 비교하는 데에 초점을 맞추었다. 순산소 연소는 당량비 0.93 에 해당하는 연료 유량 15lpm 일 때 OFR 전 영역에서 안정적이었고, 화염 구조와 길이는 OFR 에 따라 변동하였다. 순산소 연소에 $CO_2$ 를 첨가할 때, 안정, 천이, 준평형, 불안정 그리고 날림 등의 다양한 안정화 모드가 관찰되었으며, 연소로 내의 전반적인 온도분포가 감소하였고, 특히 case 4 에서 1800 K 이하로 떨어져 최대 감소 효과를 보였다. 노즐 끝단으로부터 높이에 따른 $CO_2$ 농도는 첨가된 $CO_2$ 의 체적 비율에 따라 변동하였다.

• The Korean Journal of Physiology
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• 제2권1호
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• pp.47-52
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• 1968

Twenty white rabbits anesthetized with nembutal (30 mg/kg) were employed in this experiment. Five of them served as controls; the remaining rabbits as experimental group were subjected to irreversible hemorrhagic shock. Shock was induced by bleeding the animals until mean blood pressure decreased to a level of 50-40 mmHg. This level of pressure was maintained for 3-4 hours, after which the drawn blood was reinfused. The reinfusion of blood caused the elevation of arterial pressure almost the control level for some minutes, after which a gradual and progressive decline of blood pressure became evident. This decline was thought to be the result from irreversible hemorrhagic shock. When mean blood pressure declined to less than 50 mmHg, chest was opened and samples of arterial blood and left ventricular muscle were taken. Left ventricular muscle and blood plasma were analyzed for potassium, sodium, chloride and water content. Blood glucose concentration was determined by Somogyi-Nelson's method. Extracellular and intracellular myocardial water and electrolyte content were calculated on the basis that electrolytes are distributed between plasma water and interstitial water according to Gibbs-Donnan equilibrium. In this calculation extracellular water was substituted for Na space. The findings obtained were as follows: 1. The concentration of blood glucose was 87mg% in the controls and it rose to 222 mg% in shock (P<0.01). 2. Plasma potassium elevated significantly from 3.3 mEq/l in controls to 8.0 mEq/l in shock (P<0.01), while small decreases in sodium (151-146 mEq/l) and chloride (102-96 mEq/l) were observed (P<0.3, P<0.1), 3. The changes of blood water content (83.1-84.3%) and cardiac water content (77.5-78.3 gm/100gm WT) were observed. 4. In control animals myocardial potassium levels which averaged 30.2 mEq/100 gmDT rose significantly to 40.3 mEq/100 gmDT in shock (P<0.01), while moderate decreases in sodium(16.3-14.3 mEq/100 gmDT) were observed in shock. 5. The calculated transmembrane resting potential of left ventricular muscle of control animals averaged 95 mV, while rabbits in shock averaged 77 mV. (P <0.01). The findings of this experiment do not correspond with the conclusions that myocardial depression seems to be the cause of irreversible hemorrhagic shock, because the excitability of heart muscle is elevated. From the point of view that the lowered transmembrane resting potential, the cause of death in terminal stage of irreversible hemorrhagic shock may be ventricular fibrillation. It can't be said, however, that the lowered transmembrane resting potential is responsible for the transition from reversible to irreversible hemorrhagic shock. The marked increase in blood glucose suggested that glycogenolysis in the liver is favorably active in shock.