Mush-room의 生産性에 관한 硏究

鄭大敎 건국대학교 1968 學術誌 Vol.9 No.1

Studies were made to determine the factor of the decrease Korean mush-room production by spawn. Following are the results obtained. ① Used spawn are DA, DB, MM, CA, CB, FN, KA, KB, SY and KS. ② Used media are soybean sauce, corn, potato, malt, pettone, glucose, wood destroying fungi (II) and wood destroying fugni agar media (III). ③ Comparing the effective growing activities of spawn throw used all agar media by orders the group of SY, DA, KA, are best, the group of FN, CA, KB, MN are medium and the group of CB, KS, DB are very poor. ④ Through the all used spawn, better media are found glucose, soybean sauce, lepton, potato, agar media by order. And other media are very poor.

돼지에서 由來한 耐熱性 腸毒素生産 大陽菌의 分離 및 判定

都大洪,金敎昌,金道榮 충북대학교 농업과학기술연구소 1987 農業科學硏究 Vol.5 No.2

Enterotoxigenic E.coli is the one of major causative occured to the infantile swine diarrhea. A total of 189 isolated idem assumed E. coli, Salmonella and Shigella was isolated from swine in Kyong-Gi and Chung-Cheong province. When enterotoxigenic E. coli was infected to infant swine, these adhered to the mucosa of small intestine with pili and excrete enterotoxin, which caused the diarrhea. The detection of a heat-stable enterotoxin(ST) produced of isolated E.coli was porformed by infant mouse assay, and was identified pili by the aggutination test of rbc suspention. The plasmid DNA profile was investigated by the agarose gel electrophoresis. The results of assay to enterotoxigenic E.cofi summarized as follow. Isolation ratio of enterotoxigenic E.coli among total of 45 isolated strains was taken 56.52% during summer. Four strains(KS-4, KM-7, KM-12, CM-7) of high produced ST were showed the G/B ratio above 1.10 by infant mouse assay. Four strains of high produced enterotoxigenic E.coli was isolated from swine with diarrhea, and 3 strains (KS-4, KM-7, KM-12) were proved to possess K88 and K99 antigens, or K88 antigen. The patters of plasmid DNA was contained 4.5kb plasmids encoded for ST. The antibiotics sensitivity patters of cultured enterotoxigenic E.coli were showed a tendency to be resistant against tetracycline and streptomycin.

참나무류의 용도개발을 위한 비교내후성 연구 : Tyromyces palustris와 Coriojus versiclolor균을 중심으로 By Tyromyces Palustris and Coriolus Versicolor

정대교,민경희 건국대학교 교육대학원 1990 敎育論叢 Vol.13 No.-

This study was carried out to investigate the relative durability of 6 Quercus species. The relative durability of decay was expressed by the percentage of weight loss. The test fungi were Tyromyces palustris and Coriolus versicolor. The results are as follows: 1.Heart wood of Q. dentata and sap wood of Q. variabilis were showed the highest durability for T. palustris and the lowest decay-resistance was heart and sap wood of Q. mongolica for it. 2.For C. versicolor, the durability of heart and sap wood of Q. dentata highest and it of Q. mongolica was showed the lowest without any difference heart wood and sap wood. 3.The weight loss were not showed the significant difference among the samples taken from different height of the tree for all 6 species. The weight loss of all 6 species, however, were significant above 450cm of the trunk expect sapwood of Q, dentata and Q. variabilis for T. palustris. 4.Quercus dentata may be the best decay-resistant by T. palustris and C. versicolor for T. palustris.

분꽃씨의 抗알레르기 效果에 대한 硏究

鄭大琪,宋昊埈,辛民敎 대한본초학회 1997 大韓本草學會誌 Vol.12 No.1

This study was investigated the inhibitory activity of Semen Mirabilis (SM) (Nyctaginaceae) on type 1 immediate hypersensitivity of the anaphylactic type. 1 used a mouse model of passive cutaneous anaphylaxis, an IgE-mediated, mast cell-dependent reaction. Administered orally at 250, 500 ㎎/㎏ body weight 1 h before the challenge, SM was potently inhibited PCA in mouses in which disodium cromoglycate showed poor inhibitory activity. SM inhibited compound 48/80-induced anaphylaxis 94.21% with a dose of 0.5g/㎏ body weight at 1 h before or 5 and 10 min after injection of compound 48/80. SM (0.03-2.0 ㎎/㎖) also exhibited the dose-dependent inhibitory effect on compound 48/80-induced histamine release from rat peritoneal mast cells. Moreover, it was clearly demonstrated that SM and disodium cromoglycate disodium cromoglycate potently inhibited such type I allergic reactions as anaphylactic shocks, suggesting that these drugs, at least in part, share the same mechanism of action. It is suggested that SM may exert a stronger inhibition on the mast cell degranulation process. When I examined the effect of SM on the release of IgE in mouse spleen whole cells and human mycloma U266B1, the release of IgE is inhibited by Mirabilis jalapa L. These results suggest the possibility that the inhibition of allergic reaction by SM is regulated by histamine and IgE.

핵저지능이 열자극전류에 미치는 영향

邊大鉉,趙昌熙,韓斗敎 弘益大學校 1987 弘大論叢 Vol.19 No.2

In this study induced thermally stimulated current by the TSC was measured by the open circuit method after implanting Na+ ion into a PET film. With the result, using a new theory, activated energy, escape frequency, relaxation time and ion density was evaluated. (-) peak appeared at 363 K and 390 K when temperature increasing rate was 0.1 K/sec. and a (+) peak in the range 310~350 K. As a result of analysis, the peak at 363 K was by Na^(+) ion trapped in the surface trap and the activated energy 1. 14eV. 390 K peak had 1.66 eV activated energy and was by Na+ ion trapped in a vacance. The TSC current of 390 K peak was proportional to nuclear stopping power.

薄板의 加工性에 미치는 異方性에 관한 硏究(Ⅰ)

徐大敎,金東哲,禹鎬吉 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.1

This study is concerned with the anisotropy which affects the workability of several different sheet metals. To do this, authors studied the earing through the deep drawing process, using the results which were obtained by studying the effect of the anisotropy of sheet metal in tensile yielding. The results through this study are as follows; 1) The corresponding maximum errors of the theoretical and experimental results in steel, brass, and aluminum plates in tensile yielding are 16%, 6%, and 5% respectively. 2) The earing of steel, brass and copper plates whose thickness are 0.62㎜ are two or three times as high as those of corresponding plates whose thickness are 0.34㎜. 3) The assumption of costa is satisfied in steel plate, but it is not satisfied in brass plate. It is hoped that the results of this study will be made reference to other works of sheet metal.

病原性 大腸菌이 생성하는 耐熱性 腸毒素의 抗體 생성조건 및 中和效果

金敎昌,都大洪,鄭埈永 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.11 No.1

The heat-stable enterotoxin(ST) producing Escherichia coli strains were isolated from the swine. The purified ST was immunized with ST-BSA conjugate and obtained antiserum from a rabbit (New Zealand Whit). A pathogenic toidity was neutralized with anti-rabbit serum. When antiserum obtained from rabbits immunized with ST- BSA antigens. It was production the most of antiserum at the fourth immunization (21 days). Obatined antisera neutralized the toxic activity of purified 4 mouse units to 1 : 32 of antisera dilution folds.

우리나라 政府出捐 硏究機關의 外國技術 導入 經路選擇의 決定要因에 관한 硏究

金敎祥,趙大宇 韓國國際經營學會 1992 國際經營硏究 Vol.3 No.1

우리나라는 `90년대 산업의 질적 고도화와 지속적인 경제성장을 뒷받침하기 위하여 科學技術의 중요성이 요구되고 있다. 이를 실질적으로 뒷받침하기 위한 방법의 하나로서 政府出捐 硏究機關들이 외국으로부터 산업기술 및 공공기술에 필요한 기술도입계약과 함께 정부 특정연구과제로서 國際共同硏究와 아울러 國際技術協力 등을 중심으로 한 公共技術協力을 추진하고 있다. 민간제조기업의 기술도입경로가 海外直, 合作投資 및 技術導入契約 등인 데 비해 정부출연연구기관의 기술도입경로는 기술도입계약외에 公共技術協力 (이는 국제공동연구, 국제기술협력 등으로 대별됨)이라는 상이한 경로를 밟고 있다. 그러나 국제간 기술이전에 대한 연구의 대부분이 민간제조기업에 의해 수행되는 현상을 연구해온 데 대해 본 연구에서는 이미 중요한 기술도입주체로 부각되어 향후 우리나라를 기술대국으로서의 기반을 짊어져야 하는 주체로서의 정부출연연구기관을 연구대상으로 하여 기술도입경로선택에 영향을 미치는 결정요인을 규명해 보자는 데 그 의의가 있다. 이를 위해서는 연구기관이 갖는 特有性(uniqueness)을 smoothe시키고 普遍性(universality)을 전제로 하기 위해 새로이 구성하였다. 한편 기술도입경로도 민간기업과는 달리 기술도입계약, 공공기술협력(국제공동연구, 국제기술협력)등으로 재편하였다. 보다 보편적인 決定要因을 추출하기 위해 독립변수군을 기술특성군, 기술제공특성군, 기술도입자특성군, 정부특성군 등으로 4대분류하여, 기술도입경로선택의 결정요인을 檢證하였다. 결론적으로 정부출연연구기관의 外國技術導入經路의 選澤 및 說明變數로는 다수 (예: 기술수명 주기상의 위치, 기술연령, 기술도입담당부서, 국제협정지원 등) 가 선정될 수 있으나 그 중에서 技術의 垂直的 位階分類가 가장 중요한 결정요인임을 밝혔다. 즉 정부출연연구기관의 개별성 및 특유성에 관계없이 도입기술이 기술위계상 基礎基盤技術일 경우에는 國際共同硏究, 應用技術일 경우에는 國際技術協力, 常用化技術일 경우에는 技術導入契約이라는 經路를 선택하는 성향을 검증했다는 점이다. 이 연구결과는 정부출연연구기관의 경우 기술위계상 특성에 따라 외국으로부터 기술도입경로를 선택할 수 있는 기준을 제시할 수 있다는 데 그 의의가 있다고 본다.

主要木材의 理學的 性質에 관한 實驗的 硏究 : - 特히 Water Absorption에 대하여 -

鄭大敎 건국대학교 1968 學術誌 Vol.9 No.1

(1) The capacity of wood to absorb water is very important as the basic data for wood industry, particulary in preservative impregnation, manufacturing of improved wood, selction of packing boards, etc. The water absorbing capacity of wood is known to be influenced by structural section, viscosity of water, length of soaking time, temperature, pressure, surface tension, etc. due to limitation. The differences in water absorbing capacity of wood by structural section were investigated. (2) The species used in this investigation were 5 coniferous and 11 deciduous species totalling 16, dimension of the testing wood bloclss was 30-30-100mm. The testing blocks were soaked in fresh water of 25±1℃ for 24 hour, after which the amount of water absorbed was measured. (3) The result showed that the absorption by cross section was 3 to 12 times greater than these by either radial or tangential section. (4) Differences in water absorption between radial and tangential section were generally negligible. (5) In general, the species which showed high water absorbing capacity in cross section also followed the same trend in both radial and tangential sections. (6) Differences in the absorption by ring-porous wood and diffuse porous wood, and differences by coniferous and deciduous groups were not apparent

數種 木材腐朽菌의 菌絲 發育에 미치는 防腐劑의 效果

鄭大敎 건국대학교 1967 學術誌 Vol.8 No.1

(1) The sterilizing effects of NaF, CuSO4, CuCO3, Hgcl2, ZnSO4, and Coaltar Creosote on the mycelial growth of Irpex Censors Berk Polystictus Versicolor L. Fr, Polystictus Versicolor L. Var Nigricans, and Schigophyllum Commune Fr. were studied. (2) The range of minimum density of the fungicides to check. The growth of four fungi mentioned above was as follow : NaF 0.15∼0.25(%) CuCO3 0.40∼0.50(%) ZnSO4 0.40∼0.45(%) CuSO4 0.20∼0.35(%) Hgcl2 0.05(%) Creosote 0.10∼0.15(5) of the fungicides tested, Hgcl2 was most effective in fungicidal effects, and Creosote, NaF, CuSO4, ZnSO4, CuCO3, followed. The order of resistance of the fungi to the fungicides was as follows: S, Commune Fr, P, Versicolor L. Var, nigricans I, Censors Berk P, Versicolor L. Fr (3) The fungicides were added to the Pepton-ager culture medium at the concentration between 0.01 and 0.5%, and the medium was filled into 9cm Petridishes, two square millimeter ager blocks prepaered separately from the fungi contained ager were placed in the middle of the Petri-dishes, incubated six days at 26℃. Diameter of biggest colonies were measured.