2,4-D 處理가 'Harcot' 살구와 '美白' 복숭아의 果實 成熟과 品質에 미치는 影響

윤철구,김영호,임상철,김학현,이철희,최관순,김선규 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

Effect of 2,4- D application on the fruit maturity and quality of 'Harcot' apricot and 'Mibaek' peach was examined. Leaf area of 'Harcot' apricot was not affected by 2,4-D while that of 'Mibaek' peach was increased by 35mg · L-1 2,4-D. Application of 2,4-D at 35mgㆍL-1 increased the fruit weight of both species, and that of 'Harcot' was doubled. Soluble solids content of 'Harcot' was decreased by 2,4-D while that of 'Mibaek' was not affected. Fruit maturity of 'Harcot' and 'Mibaek' was enhanced for respective 4 and 1 day by 2,4-D application. Percent fruit cracking of 'Harcot' apricot was decreased by 35mg · L-1 2,4-D.

지베렐린과 에세폰의 葉面撒布가 '美白' 복숭아의 熟期와 品質에 미치는 影響

김영호,윤철구,임상철,김학현,이철희,최관순,김선규 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

In order to obtain the basic data for artificial maturity control of 'Mibaek' peach, GA and ethephon were foliar sprayed 4 weeks prior to harvest, and their effects on fruit maturity and quality were examined. GA and ethephon tended to decrease the fruit weight except 100mg ㆍ L-1 GA+50 to 100mg · L-1 ethephon treatment. GA increased the fruit firmness, and ethephon at higher concentration increased the fruit drop. Harvest date was advanced for 7 to 8 days by ethephon while was delayed for 6 to 8 days by GA treatment, regardless of concentration.

국소성 피질이형성증의 외과적 치료

조관국,김형일,이민철,김근수,김연희,정창오,Neto, Pedro R. 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.12

Corticai Dysplasia(CD) is increasingly recognized as a cause of intractable epilepsy since it can be easily diagnosed with high resolution magnetic resonance imaging(MRI). We analyzed 24 consecutive cases with cortical dysplasia who underwent resective surgery at our institute between September. 1992 and December. 1995. MRI was demonstrated to be a decisive tool to identify CD in 16 cases(66.7%). However, the remaining 8 cases(93.9%) were confirmed to have CD based on histological examination. Location of the lesion included temporal(n=9), central(n=5), multilobar(n=5), and frontal(n=5). Intracranial EEG recording was performed to delineate the epileptogenic zons in 16 cases : subdural grid(10 cases) and depth electrode(6 cases). Resection was performed in temporal(n=9), frontal(n=7), central(n=5). parietal(n=1), and muitilobar(n=1). Complete resection was possible in 15(62.5%) and partial resection in 9(37.5%). Histological examination revealed dyslamination of cortical layers only(n=9), additional dysplastic neurons(n=7), and additional balloon cells(n=8). Surgical outcome was graded as seizure free(n=14 : 58.3%), rare seizures(n=3 : 12.5%). <50% reduction of seizure frequency(n=2 : 8%), and no change(n=5 : 20.8%) after mean follow-up of 12.7 months. The most influencing factor on the surgical outcome was the degree of completeness of resection(p<0.05). However. detectability of CD on MRI, severity of histological findings, age of seizure onset, and duration of seizure were not significantly related with the surgical outcome High suspicion is required to detect the CD among the patients with intractable epilepsy and surgical strategies should be well-planned to improve the surgical outcome in the patients with CD.

길거리농구 경기에 참가한 청소년의 스포츠 성취동기와 학업성적과의 관계

서정관,박철용 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

Street Basket ball was held 8 times for the sample of Junior high School students and High School Students to analyze the relationship between their change in motivation to succeed and their development in School work. To this end, twenty students of Junior High School and another twenty students of High School were selected and AMPET test was carried out to test their learning strategy, overcoming obstacles, diligence and serious ness, athletic competency, value of learning. Then Paired t-test and T-test were performed and for the ratio of change respectively to figure out Pearson's Correlation Coefficient and the findings are as follows. First, there was in crease in motivation among the Junior High School students while there was no change detected in that of the High School students, Systematic participation in the game contributed to the increase of the motivation but unorganized partake in the game appeared not to produce any effect. The timing of the participation also made some difference in effect and less than one hour of participation proved to be more effective than one hour' s participation. Second, correlation between the motivation to succeed was low for the students regarding the type of participation and the timing. And the correlation between the change in the motivation to succeed and their School work performance appeared to be low.

치과 주조용 매몰재의 물성에 관한 연구

김관식,김철위 大韓齒科器材學會 1992 대한치과재료학회지 Vol.19 No.1

The purpose of this study was to evaluate the characteristics of eight commercially available dental gold casting investments (GI-1, GI-2, GI-3, GI-4, GI-5, GI-6, GI-7, and GI-8) and eight dental high temperature casting investments (HI-1, HI-2, HI-3, HI-4, HI-5, HI-6, HI-7 and HI-8) being used in Korea. The following properties were studied: fineness, consistency, setting time, compressive strength, setting expansion, thermal expansion, surface defects of castings, setting temperature rise and acidity. These tests were performed according to the KDA Specification No. 13: Dental gold casting investments, KSP 5205 : Dental gold casting investments, RANSI/ADA Specification No. 2: Gypsum-bonded casting investment for dental gold alloy, RANSI/ADA Specification No. 42: Phosphate-bonded investments, JIS T 6601 : Dental casting investments. From the experiments, the following results can be drawn : 1. In case of the fineness of the gold casting investments, the passed amount was 99.86% to 100% through No. 30 sieve, 39.53% to 91.94% through No. 100 sieve and 9.67% to 79.08% through No. 200 sieve. In high temperature casting investments, the passed amount was 99.61% to 100% through No. 30 sieve, 45.22% to 73.69% through No. 100 sieve and 13.04% to 25.24% through No. 200 sieve. 2. The consistency of gold casting investments was 55.48 ±7.70mm to 145.32 ±3.63mm, and that of the high temperature casting investments was 88.68 ±12.66mm to 145.52 ±3.09mm. The setting time of gold casting investments was 8.25 ±0.66 Min. to 23.75 ±0.25 Min. and that of the high temperature casting investment was 14.00 ±0.90 Min. to 23.08 ±2.04 Min. 3. The compressive strength of gold casting investments was 17.95 ±1.27㎏/㎠ to 45.44 ±4.47㎏/㎠, and that of the high temperature casting investments was 28.13 ±1.83㎏/㎠ to 81.38 ±4.29㎏/㎠. The setting expansion of the gold casting investments was 0.081% to 0.315%, and that of the high temperature casting investments was 0.005% to 1.001%. 4. The thermal expansion of gold casting investments was 0.24% to 0.90% at 700℃, and that of the high temperature casting investments was 0.006% to 0.06% at 1,000℃. The surface irregularities of castings observed were incomplete margin, fin, surface roughness and porosities. 5. The temperature rise during setting was 4.40℃ to 9.50℃ with gold casting investments, and that of the high temperature casting investments was 29.50℃ to 36.40℃. The time to reach the peak temperature was 23.8 Min. to 68.2 Min. with gold casting investments, and that of the high temperature casting investments was 12.2 Min. to 68.2 Min. The acidity of mixed supernatant water was pH 5.2 to pH 5.6.

서로 다른 제 2최근접 원자의 상호작용을 고려한 Ga Al AS의 에너지띠 연구

김철회,김형관,한백형 漢陽大學校 基礎科學硏究所 1994 基礎科學論文集 Vol.13 No.-

본 논문에서는 ??의 에너지 띠를 연구하기 위하여 tight-binding방법을 사용하였고 VCA(Virtual Crystal Approximation)방법을 개선하여, 서로 다른 제2최근접원자의 상호작용을 고려하였다. 간접갭에서 직접갭으로의 전환점은 AlAs의 조성비가 0.43일때였고, band gap은 0.0≤χ≤0.43에서 ??=0.22χ²+1.408χ+1.55, 0.43≤χ≤1.0에서는 ??=0.35χ²-0.084χ+2.03을 얻었고, 실험치와 잘 일치하였다. In this paper, the energy band structure of ?? is calculated by the tight-binding method, and the interactions of different kinds of the next-nearests are included in order to improve VCA(Virtual Crystal Approximation) method. Turning point from indirect band gap to direct band gap is found to be at AlAs mole fraction of 0.43. In 0.0≤χ≤0.43, the dependence of band gap on x is well fitted to ??=0.22χ²+1.408χ+1.55, and 0.43≤χ≤1.0, ??=0.35χ²-0.084χ+2.03.

Mossbauer 分光法과 選擇的 抽出方法에 의한 濟州島 土壤에서의 酸化鐵의 特性 究明

宋寬哲,姜東佑,金斗哲,高正大,洪性樂 濟州大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.10 No.1

濟州島의 8개 代表土壤을 對象으로 하여 X-線 螢光分析, X-線 回折 分析, oxalate와 dithionite-citrate를 사용한 選擇的 抽出方法 및 Mossbauer 分光法으로 一次鑛物, ferrihydrite, 結晶質 酸化鐵의 種類, 含量 및 非磁性 Al이온의 置煥程度에 대하여 考察하였다. 1. X-線 螢光 分析에 의한 濟州島 8개 土壤統의 酸化鐵(Fe₂O₃) 含量은 噴石口 토양인 松岳統에서 18.21%로 가장 높았고 논토양인 大靜統에서 8.03%로 가장 낮았다. 2. X-線 回折 分析 結果 8개 土壤統 모두에서 ferrihydrite와 結晶質 goethite의 回折 피크는 나타나지 않았지만, 結晶質 hematite는 松岳統, 舊巖統 및 黑岳統에서 檢出할 수 있었다. 3. 선택적 침출방법으로 측정한 ferrihydrite 含量은 흑색토인 松堂과 吐坪統, 농암갈색의 분석구 토양인 柑山統 및 갈색삼림토인 黑岳統에서 20.9-35.2g/㎏으로 높았고, 논토양인 大靜統에서 0.85g/㎏으로 가장 낮았다. 結晶質 酸化鐵 含量인 Fed-Feo 含量 松岳統에서 28.7g/㎏으로 가장 높았고 黑岳統에서 7.6g/㎏으로 가장 낮았다. 4. 濟州島 8개 土壤統에 함유되어 있는 常磁性 Fe³+ 鑛物들은 化學造成이 거의 같은 ferrihydrite, 超常磁性 goethite, 층형 硅酸鑒粘土鑛物로서 柑山統에서 그 含量이 가장 높았고 松岳統에서 가장 낮은 것으로 분석되었다. 常磁性 Fe²+ 一次鑛物은 柑山統과 黑岳統에서 olivine, illite의 含量이 優勢하였으나 그 외 土壤에서는 小量의 chlorite, augite, biotite, hornblende 등이 含有되어 있는 것으로 분석되었다. 5. 18K에서 측정된 超微細磁氣場값으로 부터 大靜統에서는 미세한 goethite 만이 含有되어 있는 것으로 確認되었고, 그외 7개 土壤에서는 입자 크기가 작은(∼180Å) 結晶質 hematite와 goethite이 것으로 分析되었다. 6. 濟州島 8개 土壤統에 함유되어 있는 酸化鐵의 구조에서 Fe³+와 非磁性 Al³+이 相堂量 部分 置煥되었음을 確認할 수 있었다. Iron oxide compounds in 8 selected Cheju Island soil samples have been analized by X-ray fluorescence spectrometer(XRF), X-ray diffractometry(XRD), selected chemical techniques, and Mossbauer spectroscopy. The result of this analysis by XRF shows that the rate of quantity of Fe₂O₃ in 8 soil samples was from 8.03wt.%(Daejeong paddy soil ) to 18.21wt.%(Songag soils). Songag, Heugag and Gueom soils were detected to have lower peaks of intensity of hematite by XRD. In addition, these soils were not detected to have hematite and goethite peaks. Ferrihydrite, which is a short-range-order mineral commonly present in volcanic ash soil, was not detected by XRD due to low concentration and/or poor cristallinity. Ferrihydrite contents estimated from Feo values were 8.8∼35.2g/㎏ for volcanic ash soils and 0.85g/㎏ for the Daejeong soil. Most of the soil samples represented by the paramagnetic Fe³+ doublet obtained from Mossbauer spectra at room temperature and 18K were considered to arise from the presence of ferrihydrite, superparamagnetic goethite, and silicate minerals. Also the paramagnetic Fe²+ doublets are attributable to primary minerals such as olivine, illite, chlorite, augite, biotite, and hornblende. Goethite and hematite were identified as the dominant crystalline iron oxides in these soils from Mossbauer spectra obtained at room temperature and 18K. All the soil samples exhibited strong superparamagnetic relaxation. Collapse of the Mossbauer magnetic hyperfine splitting at room temperature was due to the small size(∼180Å) of the oxide particles and/or Al-subsituted goethite.

육지한우의 제주지역 적응성 연구 : 1. 육지한우 제주도입시 Theileria sergenti 저항성에 관한 연구

김동철,오운용,김희석,현관종,강영배 濟州大學校 農科大學 動物科學硏究所 1993 動物科學論叢 Vol.8 No.1

This study was conducted to fine the adaptatbility of Korean Native Cattle lacking in the resistance ability to Theileriosis being occured by ticks born parasites in Cheju Island. Data used in this study were collected from none-treated and treated Thpileria sergenti blood vaccine to Korean Native Cattle, Cheju Native Cattle and Cheju Native CattlexBrahman crossbreds during the grazing season in 1988. The parasitemia level of Theileria sergenti in artificial immunized Korean Native Cattle were fewer than none-treated Korean Cattle's, due to immunizing effects. the RBC and PCV reduction were prevented, and average daily gain's 0.25kg in artificial immunized Korean Native Cattle was higher than those of 0.20kg in none-treated. The mortality numbers were one in artificial immunized Korean Native Cattle and four in none-treated Korean Native Cattle. The resistance ability of Theileriosis of Korean Native Cattle was the weakest and Cheju Native Cattle×Brah-man crossbred was the strongest among the breeds.

3원계 화합물 반도체의 에너지 밴드 구조와 전기적 특성 연구

김철회,김형관,한백형 漢陽大學校 基礎科學硏究所 1994 基礎科學論文集 Vol.13 No.-

Empirical pseudopotential 방법을 이용하여 아연 화합물 반도체의 에너지 밴드 구조를 구하였다. ??의 에너지 간격은 InSb의 조성비에 따라 ??=0.606χ²-0.727χ+0.361를 얻었고 전자이동도는 χ=0.6, 합금산란 포텐셜이 0.82eV, 온도가 77。K, 불순물 농도가 ??일때 6.7 × 10⁴cm/V-s을 얻었다. Energy band structure of zinc-blende semiconductors is calculated by the empirical pseudopotential method using the adjustable parameter. Energy gap of ?? with InSb mole fraction is ??=0.606χ²-0.727χ+0.361 and its electron mobility is found to be a high value of 6.7 × 10⁴cm/V-s with mole fraction x=0.6, alloy scattering potential ΔU=0.82eV, Temperature T=77。K, and impurity concentration ??.

초등학생의 고무줄놀이 안무활동 지도를 위한 영상 교재 구축

이관형,김명철,권선자 서울敎育大學校 初等敎育硏究所 2002 한국초등교육 Vol.13 No.2

The purpose of this study is to build elastic string play activities systematically and to provide learning-steps as follows : basic-motions, developed-motions, applied- motions and choreographic-motions. And as teaching materials, we make VCD including learning-step simulation by command and music, and CD including music. 1. We make basic-motions as we analyze a form and constituent of elastic string play. Basic-motions are as follows : Stabbing, Spinning, Hopping, Kicking, Winding, Stamping 2. As we infer from changing the direction and the movement of basic-motions, we construct developed-motions. 3. As we connect two different basic-motions and pairs them, we develop applied-motions. 4. We make our students practice above motions according to above sequence by command and afterward practice by music. 5. After students learn above motions, we let our students connect above motions with such motions as clapping, changing spot, aerobic motion and folk dance motion. 6. We make our students create and practice choreographic-motions smoothly by group studying, practicing by command, doing trial and error and completing by music.