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오상철,김영호,현종익 濟州敎育大學 科學敎育硏究所 1983 科學敎育硏究誌 Vol.7 No.-
This is a study to develop the obervations and experimental materials for the elementary school 4th.5th.6th grade science curriculum that are carried on effect from this year. The materials which teachers do and the teachers and students can make, by themselves, are as follows: 1) In the field of biology for 4th.5th and 6th grade, 11 kinds of plant observating materials were cultivated. 2) In physics field of sixth units in the text book for 4th.5th and 6th grade, 10 kinds of implements were developed: electric circuit, moving of heat, expansion of heat and body, solute, movement of Earth and Moon, eaergy of Water and Wind.
오미록,김상수,박종대,김도익,백종철 順天大學校 1997 論文集 Vol.16 No.1
배추좀나방과 유충기생봉인 프루텔고치벌에 대한 살충제의 독성을 비교한 결과는 다음과 같다. 프루텔고치벌에 기생당한 배추좀나방의 유충은 fenvalerate, pyraclofos, spinosad와 chlorfluazuron의 충체침지 또는 엽침지시에 정상유충보다 현저히 감수성이 높았다. 그러나 Bacillus thuringiensis는 엽침지시에만 기생당한 유충에 독성이 약간 강하였다. Fenvalerate, pyraclofos와 spinosad의 잔류독은 배추좀나방 성충보다 프루텔고치벌 성충에 훨씬 독성이 강하였다. 그러나 chlorfluazuron과 B. thuringiensis의 경우는 두 종의 성충에 모두 별 영향이 없었다. 따라서 B. thuringiensis는 배추좀나방의 종합관리에서 프루텔고치벌에 직접적인 영향이 없이 사용할 수 있을 것으로 사료된다. The relative toxicity of some insecticides to diamondback moth, Plutella xylostella and larval parasitoid, Cotesia plutellae was evaluated. Diamondback moth larvae parasitized by C. plutellae were significantly more sensitive to fenvalerate, pyraclofos, spinosad and chlorfluazuron than nonparasitized larvae through direct dip- or leaf dip assay. However, Bacillus thuringiensis was slightly more toxic to parasitized larvae through direct dip bioassay. The residual toxicity of fenvalerate, pyraclofos and spinosad was significantly more toxic to C. plutellae adults than to P. xylostella adults. However, chlorfluazuron and B. thuringiensis have no serious effect to adults of C. plutellae and P. xylostella. These results suggest that B. thuringiensis could be used in integrated management of P. xylostella without direct effect on C. plutellae.
오종만,이상정 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.4 No.1
Presently, there are a lot of courseware and CAI programs, and they have used in elementary school. However, courseware which improves the learning capability of students has been developed rarely. Irrespective of time and space of learning, well developed courseware should ba able to communicate with a learner bidirectionally and to provide problem-solving capability. In this study, distance education theory and its educational effects are analyzed. And the courseware which communities with students on WWW environment is developed. The astronomical subjects, especially focusing on planets, is chosen for the content of the courseware. By applying this courseware to the students through internet, the courseware could realize bidirectional communications with distant education capability and the students could develop problem-solving capability.
Periodontal dressing과 치간緣下 搔爬術이 齒苔 細菌數에 미치는 影響
吳相德,卞鍾秀 慶北大學校 齒科大學 1984 慶北齒大論文集 Vol.1 No.2
The purpose of this study was to evaluate the effects of a periodontal dressing alone and in combination with subgingival curettage on the dental plapue microorganisms. For the experiment, 14 male and 2 female dental students were selected. The experiment included three stages; no dressing, dressing and subgingival curettage with dressing. Supragingival plaque-like material was collected from gingival third of buccal surface of maxillary first molar after 7 days. The samples were immediately dispersed in distilled water by shaker, serially diluted, plated, incubated and colony counting was performed. The obtain results were followings: The total weight of plaque-like material was not affected by the use of periodontal dressing, but there was a significant difference between the stage of dressing alone and subgingival curettage with dressing. When the periodontal dressing was used in combination with subgingival curettage, there was a significant decrease in total viable microorganisms and Streptococci per mg sample as compared to the control which received no dressing or subgingival curettage. percentage of Streptococci to the total aerobic microorganisms were 51.14%, 46.94%, 49.63% in each stages.
제주도 감귤원 토양의 화학적 특성과 물 분산성 콜로이드 함량
오상실,현해남,정종배 한국환경농학회 2002 한국환경농학회지 Vol.21 No.2
토양 중에서 농약을 대공극과 숨골을 통하여 지하수로 이동시킬 수 있는 매체로 작용하는 물분산성 콜로이드 함량과 그 안정성은 여러 가지 토양의 이화학적 특성에 의해 결정된다. 본 연구에서는 제주도 감귤원에서 채취한 30개 토양을 사용하여 pH, 유기물, oxalate 용액 추출성 Al과 Fe 등이 물분산성 콜로이드의 함량에 미치는 영향을 조사하였다. 토양의 pH가 증가할수록 물분산성 콜로이드의 함량이 높았으며, pH 5~6 이상의 토양에서는 표면 음전하의 증가에 따라 콜로이드의 안정성이 높아질 가능성이 많은 것으로 나타났다. 낮은 pH 조건에서는 표면 음전하의 감소와 함께 활성 Al 또는 Fe 함량이 증가함에 따라 콜로이드의 응집 현상이 촉진되는 것으로 나타났다. 물분산성 콜로이드의 함량은 콜로이드의 입단화를 촉진시킬 수 있는 토양의 유기물 함량과 반비례하였으며, 유기탄소 함량 5% 이하의 토양에서 특히 물분산성 콜로이드의 함량이 많게 나타날 가능성이 높은 것으로 나타났다. Oxalate 용액 추출성 Al과 Fe의 산화물 또는 수산화물들 그리고 Al의 유기물 복합체는 토양 중에서 콜로이드 형태로 존재할 수도 있으나 점토광물의 입단화를 촉진시키는 결합제로 작용함으로써 물분산성 콜로이드의 분산을 억제하는 것으로 판단되었다. Water-dispersible colloids are suspected to facilitate transport of contaminants to groundwater. This study evaluated some soil chemical properties in relation to the stability of colloids in soils of Jeju citrus orchards. Thirty surface soil samples were collected, and pH, organic matter content, oxalate-extractable Al and Fe contents, and water-dispersible colloid content were measured. In soils of higher pH, water-dispersible colloid contents were higher. The stability of colloids was found to be significantly promoted at pH above 5~6. Since organic matter can act as a flocculant, organic matter content significantly enhanced the colloid stability. In soils of less than 5% organic C, water-dispersible colloid content was expected to be significantly higher. In soils of higher oxalate-extractable Al and Fe contents, colloids remaining in suspension were lower. This indicated that amorphous oxides and hydroxides play important stabilizing roles in soil structure and can stabilize soil clay against dispersion. Therefore in soils of higher pH, lower organic matter, and lower amorphous clay minerals, the stability of water-dispersible colloids and the potential of colloid-mediated transport of organic chemicals to groundwater could be higher.
오상록,이갑조,김종관 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
The dimensions and forms of precise machined parts are different to kinds of machine. It will be variant according to machine wear, tool form, cutting method and cutting condition at the same machine. At that time, the most important things are controlled and measured by appropriate measuring instruments. This paper aims to contribute to improving measurement accuracy through evaluation and consideration about various roundness in the machining company.
아세토니트릴-물 혼합용매에서 Cu(Ⅱ)이온과 거대고리 리간드 간의 반응속도
吳相午,朴裕哲,卞鍾轍 慶北大學校 1986 論文集 Vol.42 No.-
The deprotonation constants of rac-5.7.7.12.14.14-hexamethlyl-1.4.8.11-tetraazacyclo-tetradecane(tetb, L) in acetonitrile-water mixture were studied by the spectrophotometric method. deprotonation constants, K_1^L, K_2^L, K_3^L, and K_4^L were 2.51×10 exp (-13), 3.98×10 exp (-11), 0.16 and 0, respectively. Copper(Ⅱ) reacts with tetb in acetonitrile-water mixture (pH=3.5-5.4) to give [CuL]^2+(blue isomer). At higher pH(ca.8) [CuL]^2+(blue isomer) is slowly converted into [CuL]^2+(red isomer). The kinetics of formation of the blue complex ion have been investigated at 25-35℃ and 0.1M NaClO_4 in acetate buffers. In acetate buffers Rate=k_1[Cu^2+][LH^+]+k_2[Cu(Ac)^+][LH^+]+k_3[Cu(Ac)^+][LH_2^2+] with k_1=1.45×10 exp (5), k_2=2.01×10 exp (4) and k_3=0.45 at [Cu^2+]_t=4.49×10 exp (-4)M. From the temperacture effect on kinetic constant kinetic parameters enthalpy of activation(ΔH^≠) and entropy of activation(ΔS^≠) of reaction were evaluated, their values 25.43 Kcal.mol^-1 and 7.25eu at pH=4.5, respectively. The formation of blue complex ion was controlled by the ΔH^≠, and isokinetic temperature between ΔH^≠ and ΔS^≠ was 364.64K.
Bakers' Yeast와 포도당을 이용한 m-Bromoaniline의 합성
오성환,김경순,박종옥 慶星大學校 1995 論文集 Vol.16 No.2
Rapid and selective reduction of nitro compounds is of importance for the synthesis of amino compounds, particularly when a molecule has other reducible groups. In recent years, Bakers' Yeast has been used for enantioselective reductions of β-keto esters of α,β -unsaturated carbonyl compounds. However, little attention has been paid to the reduction of aromatic nitro compounds by Bakers' Yeast. In this paper, we wish to report a mild and selective reduction of m-bromonitrobenzene with Bakers' Yeast and glucose.
오선미,김종학,황평주,구영선,강민규,나기량,김종섭,김성숙,이강욱,신영태,설종구,배진선,손기섭 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.2
To investigate the prognostic factors for the survival of transplanted kidney in patients with end-stage renal failure, 59 cases of renal transplantation from September 1986 to Feburary 1997 in Chungnam National University Hospital were analyzed retrospectively. The results were as follows: 1)The mean age of recipients was 33.8 years and that of doners was 38.9 years. The male to female ratio of recipients was 2.5:1, and that of donors was 1.03:1 2) Living related donore(LRD) were 79.6% and living non-related donors were 20.3%. The HLA-identical donors(ID) in LRD were 18.7% and HLA-haploidentical donors(HID) were 61.0%. In living non-related donors(LNRD), mean matched HLA-AB antigens were 1.56 and mean matched HLA-DR antigens were 0.56. 3) The average 5-year patient survival fate was 94%, and average 5-year graft survival rate was 70%. The 5-year graft survival fate of HLA-ID was 100%, and those HLA-HID and LNR were 70% and 36% respectively. 4) Total 33 episodes of acute rejection were found in 45.8% of transplanted patients. The number of acute rejection episode did not show significant difference between LRD and LNRD(P > 0.05). There was no significant difference in MLC between two groups(p > 0.05). 5) In comparison between the 18 patients who lost their graft function in 5 years and 17 patients who are maintaining graft function for more than 5 years, MLC was significantly lower in patients with functioning graft than of patients with non-functioning graft (p < 0.05). The number of rejection episode was also lower in patients with functioning graft than that of the patients with non-functioning graft(p < 0.05). However, there were no significant difference in recepient and donor age and history of pre-transplantation donor specific transfusion between two groups. With the results above, we can speculate that adequate donor selection according to good matched HLA typing and low MLC is very important for graft survival in renal transplantation. Prevention and treatment of acute rejection in renal transplantation is also na important factor for graft survival.
오미록,김상수,박종대,백종철,김도익 順天大學校 1997 論文集 Vol.16 No.1
배추좀나방의 유충 기생봉인 프루텔고치벌의 기생특성에 대해 조사한 결과는 다음과 같다. 프루텔고치벌은 배추좀나방 유충의 모든 영기에 기생하였으나, 주로 2령과 3령충을 선호하였다. 온도별 프루텔고치벌은 배추좀나방 유충에 대한 기생율은 18, 20, 25, 30℃에서 각각 41.9, 66.0, 86.0, 68.7%였다. 프루텔고치벌은 배추좀나방 유충의 밀도가 증가함에 따라 기생수는 증가하나 그 증가율은 감소하는 Holling의 제2형(포화형) 기능반응을 나타내었다. This experiment was conducted to investigate the parasitic characteristics of Cotesia plutellae Kurdjumov, a larval parasitoid of Plutella xylostella L. Although C. plutellae parasitized all 4 instars of P. xylostella, it parasitized mainly the second and third instars. Parasitisms of C. plutellae at different temperatures were 41.9, 66.0, 86.0, and 68.7% at 18, 20, 25, and 30℃, respectively. The parasitic response curve of C. plutellae to the host density indicated Holling' type Ⅱ(saturation type) functional response: the parasitism of host by C. plutellae increased with the host density but the parasitic rate decreased.