2차원 및 3차원 초음파를 이용한 태아표면의 해부학적 선별 검사에 관한 연구

윤석범,이해혁,이정재,최경훈,이순곤,이임순,이권해 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Objective : Our purpose of this study was to determine the clarity and consuming time of fetal surface screening in thirty-eight fetuses from 24 to 32 weeks of gestation by use of two and three-dimensional ultrasonography. Methods : From May 1998 to July 1998, we performed the fetal surface screening of the fetal face, extremities, and spine. Thirty-eight fetuses of 24-32 weeks of gestation (thirty-seven normal fetuses and one abnormal fetus) were studied by use two-dimensional (AI 5200S, 3.5-5.0MHz; Acoustic Imaging Technologic Cooperation, U.S.A.) and three-dimensional ultrasonography (Volusion 530D, 3.5-5.0 MHz ; Kretz-Medicine, Korea). On the fetal face, we evaluated both orbits, nose, lips and brow. Both hands and feet, five digits and toes should be seen in this study. We evaluated cervical spine and lumbosacral junction of the spine. Results : The maternal average age of 38 patients was 29.9 years and the average gestational age was 29.7 weeks. The results of fetal surface screening were as follows : face (both orbits 89.5%, lips 92.1%, nose 92.1%, and brow 89.5%), extremities (both hands 68.4% and feet 73.7%), and spine (cervical spine 94.7% and lumbosacral junction 97.4%) by use of two-dimensional ultrasonography. By use of three-dimensional ultrasonography, results were as follows : face (both orbits 76.3%, lips 81.6%, nose 81.6%, and brow 78.9%), extremities (both hands 76.3% and feet 78.9%), and spine (cervical spine 71.1% and lumbosacral junction 73.7%). Consuming time for two-dimensional ultrasonography were 4.7 minutes for face, 11.6 minutes for extremities, and 5.7 minutes for spine. Using three-dimensional ultrasonography results were 12.8 minutes for face, 17.9 minutes for extremities, and 11.7 minutes for spine. Average consuming time of all fetal anatomic screening was 22.0 and 42.4 minutes by use of two and three dimensional ultrasonography. In one abnormal fetus had cleft lip and polydactyly of right foot which were detected all by three-dimensional ultrasonography, but we couldn't detect the polydactyly by two-dimensional ultrasonography. Conclusion : Three-dimensional ultrasonography was more time-consuming method, but we suggested that three-dimensional ultrasonography was superior than two-dimensional ultrasonography in fetal surface screening.

粘土鑛物 添加에 따른 土壤과 溶液의 化學性變化

李在奭,金昌培,朴魯權 대구효성가톨릭대학교 응용과학연구소 1999 응용과학연구논문집 Vol.7 No.-

토양에 점토광물 bentonite, zeolite를 5, 10, 15%씩 각각 첨가하여 7일간 담수한 후 토양의 화학적 특성변화와 용액중의 수용성 양이온 함량을 조사하여 얻은 결과는 다음과 같다. 토양의 pH와 유효균산, Ca, Mg등의 함량은 무처리에 비해 점토광물 첨가로 현저히 많아졌는데 점토광물 종류별로는 bentonite가 zeolite 보다 현저히 증가하였다. 그러나 유효인산의 함량은 무처리에 비하여 전반적으로 큰 차이가 없었다. 점토광물첨가로 토양의 암모니아 흡수계수는 bentonite 보다 zeolite가 더 높게 증가하는 것을 알 수 있었다. 용액의 염기함량도 bentonite보다 zeolite가 높게 증가하는 경향이었으며 특히 K의 함량이 현저히 증가하였다. This study was conducted to investigate the soil chemical character and content of water soluble cations in soil solution when a various content of bentonite and zeolite are mixed in soil for 7 days. The soil pH, content of available silica, Ca and Mg in soil were higher than that of non-treatment soil. In addition, there are increased at the condition of bentonite addition as compared with that of zeolite addition. However, the content of available phosphate was shown not significantly as compared with that of non-treatment. It is revealed that the NH4^+ absorption coefficient in soil was incresed at the condition of zeolite addition as compared with that of bentonite addition. The water soluble base content in soil solution was increased at the condition of zeolite addition as compared with that of bentonite addition, and K content was remarkable increased.

비수용 혼합물에서 콜레스테롤 산화효소반응

李碩宰,李康民 全北大學校 1996 論文集 Vol.42 No.-

Enzyme reaction is a highly specific reaction in nature. The use of enzymes in nonaqueous mixture could open a new possibility of application in biocatalysis of low water soluble substrate and in synthesis reaction. The frequently investigated systems of non aqueous systems are two phase, reversed micelle, soled enzyme in organic solution. There is no systematic comparison of these respective performances of these different enzyme reactions. We will study cholesterol oxidase as a good model in this systematic studies.

사과腐爛病發生園 土壤의 特性과 發病現況에 관한 연구

李在奭 대구효성 가톨릭 대학교 1984 연구논문집 Vol.29 No.2

This study was carrid out to find the relationships among physico-chemical properties of soil, occurrence rate of apple canker, and applied amounts of fertilizers in the 26 apple canker outbreaked orchards, which located in the Daegu, Gyeongbug Province, Chungbug Chungju, and Chungnam Yesan as major apple production districts. The results were summarized as follows. 1. In the soil texture, the orchards which the apple canker was slightly occurred were loam, but the orchards which the apple canker was severely occurred were sandy loam which contained less silt and clay. 2. Base of Ca++, Mg++,Na+,K+, organci matter content C.E.C. and base saturation in the top soil of slightly apple canker occurred orchards were more and highter then those in the severely apple canker occurred orchards. 3. There was none significant correlation between soil PH and apple canker occurrence rate, but there was negative significant correlation between organic matter content and apple canker occurrence rate by r=-0.893**. 4. In the orchards which it's soil contained much organic matter, the moisture holding ability was increased significantly(r=0.799**) and in the orchards which it's soil moisture holding ability was high the apple canker occurrence rates were low. 5. In the skeletal soil series of Hwangryong, Deogcheon, and Tongcheon, which formed from alluvium parent material, the apple canker occurrence rates were above 80%, and in the fine loamy or coarse loamy soil series of Jungdong, Golden Delicious and Fuji apple varieties, the apple canker accurrence rates were higher, and there was no distinct tendency of apple canker occurrence to the different tree ages. 7. The applied amounts of Nitrogen and Potassium in the severely apple canker occurred orchards were more then those in the slightly apple canker occurred orchards especially in the orchards applied with fowl feces continuously apple canker occurrence rates were very severe.

大邱사과 裁培地 土壤의 有效硼素含量

李在奭 대구효성가톨릭 대학교 1997 연구논문집 Vol.54 No.2

It was investigated that the contents of boron, orgaic matter and acidity of the apple orchard soil at Taegu, Kyungsan, Yeongcheon and Kyungju area which have been cultivated from 1960's as the apple orchard. The results were semmarized as fallows; 1. The contents of avaliable boron in the top soil were distributed from 0.61±0.05 to 0,72±0.93ppm and from 0.27±0.21 to 1.12±0.33ppm in the ub soil. The contents were higher than the optimum content (0.40∼0.60ppm) except the sub soil of Weologog and Hwangryong series. 2. The avaliable boron contents was highest in the apple orchard which have been cultivated for 40years. But there was no correlationship between soil depth and tree age. 3. The contents of organic matter in the top soil were distributed from 2.41±0.65 to 4.55±0.95% and from 1.24±0.50 to 2.31±0.40% in the sub soil. The contents in the sub soil were about halfof the top soil. There were highly possitive correlationship between the content of roganic matter and available boron both in the top soil(r=0.5830??) and sub soil (r=0.5260??). 4. The soil acitidity was almost the same in the top soil (5.5±0.3∼6.1±0.6) and sub soil (5.5±0.5∼6.1±0.5). 5. The soils of the apple orchard in Taegu area belong to Deogcheon, Hwangryong, Hwabong, Ihyeon, Jungdong and Weolgog series. And the soil texture was sandy soil which have good drainage ability.

造景樹木의 葉內 硼素含量分布

李在奭,崔明子,金貞淑 대구효성 가톨릭대학교 1994 연구논문집 Vol.48 No.1

The distribution of boron on 98 different species of woody landscape plants which belonged to 38 different families were investigated. The soils used were Daegu Series developed out of Residiuum of Shale which is commonly found in Bongduk-dong, Daegu City and Hayang-eup, Kyungsan-gun, Kyungpllk Province. Some of the results obtained are summerized as follows : 1. Among the tested palnts, 33 species including European holly contained comparatively ow level of boron and 53 ones such as apple tree required medium level of boron for the normal growth. On the contrary, the rest of 9 species including Manshurian fullmoon maple accumulated much high level of boron for the normal growth. 2. Among the tested plants, tree of heaven contained the highest level of boron(90.4±0.15ppm) while arrow bamboo contained the lowest one(5.3±0.79ppm) 3. No significant correlation between the single leaf area and the boron content of the leaves was recognized when the area of the single leaf is less than 100㎠ but highly significant correlation(r=0.769**) between above two characters was recognized when that is over 100㎠/leaf. 4. when the tested plants were classified by the content of boron in the leaves, the rate of plants having the contents of 5∼10ppm, 10∼20ppm, 20∼30ppm, 30∼40ppm, 40∼50ppm, 50∼60ppm, and over 60ppm were 1%, 35.8%, 29.6%, 23.5%, 5.1%, 2.0%, and 3.0% respectively. 5. No significant correlation(r=0.072) between the content of boron in the soils naturally developed out of Shale and the content of boron in the leaves tested was recognized.

우리나라 農耕地 土壞의 有效硫黃 含量에 관한 調査硏究

李在奭 대구효성가톨릭대학교 1985 연구논문집 Vol.31 No.1

The available sulfur contents of the soils sampled from arable and forest soil in Daegu city, Gyongbug, Chungbug, Chungnam, and Jeju provinces were examined. The results obtained are summarized as follows. 1. The average content of available sulfur in paddy, upland, orchard and forest soils was 46 ppm, the minimum 13 ppm, and the maximum 118 ppm. 2. The available sulfur of soil was contained much in the order of orchard>paddy>upland>forest soil. 3. A positive significant correlation was showed between organic matter and available sulfur content in soil by ?=0.9391*. 4, The available sulfur content tended much in the soils which organic matter were about 2.0%. 5. To the distribution of available sulfur in soil, It was distributed much in deep soil layer in loam and silt loam, and top soil in sandy loam and forest slil. 6. The available sulfur was contained most in the medium acid soils(pH 5.6-6.0).

무 種子의 發芽와 生育에 미치는 産性비의 影響

이재석,최명자,정재식,이영선 대구효성가톨릭대학교 응용과학연구소 1997 응용과학연구논문집 Vol.6 No.1

황산과 질산을 3:1용량비율(V/V)로 혼합한 인공산성비(pH 2.0∼pH 4.0)처리가 무(Raphanus sativus L.) 종자의 발아, 유근과 배축의 생장, 세근, 근모의 발생 등에 미치는 영향을 조사하여 얻은 결과는 다음과 같다. 1. 종자의 발아율과 발아세는 대조구(pH 6.3)에 비하여 pH 3.0과 pH 4.0은 비슷한 경향이었으나, pH 2.0은 발아가 지연되고 불균일하였으며, pH 1.0은 전혀 발아가 되지 않았다. 2. 유근과 배축의 생장은 대조구(pH 6.3)에 비하여 pH 3.0과 pH 4.0은 차이가 없었으나, pH 2.0은 극히 불량하였으며 산성비는 배축보다 유근의 신장을 더 저해시켰다. 3. pH 2.0의 산성비는 치상후 3일째부터 유근과 배축이 서서히 굽어지고 세근과 근모가 전혀 발생되지 않았다. 4. pH 2.0의 산성비는 6일째부터 유근이 누렇게 되고 자엽이 연녹색으로 변색되었으며 엽록소가 거의 생성되지 않았다. 5. 산성이 강한 용액일수록 자엽, 배축, 유근 등의 조직이 일찍 물러지고 괴사되는 현상이 나타났다. The effects of acid rain on the germination, and growth of radical and hypocotyl of radish are studied. The inhibition effect of simulated acid rain of pH3.0 and pH4.0 on seed germination was not significant as compared to control treatment(pH6.3), while that pH2.0 reduced both germination rate and germination speed significantly. No seed germination was observed in the group treated with pH1.0. Growth of radical and hypocotyl of the seedlings treated with pH3.0 and pH4.0 was not inhibited when compared to that of control group(pH 6.3). Growth of radical and hypocotyl of the seedlings treated with pH2.0 was severly inhibited which resulted in gradual abnormal hypocotyl bending. Forthmore, no fine roots and root hairs were formed on these seedlings. Simulated acid rain of pH2.0 cused radicle chlorosis, and decolorization of cotylendons to pale green which might has been due to lack of chlorophyll synthesis.

施設園藝地에서 有效硼素 含量에 대한 土壤有機物의 相對 寄與度

李在奭,최명자,정재식 대구효성가톨릭대학교 1997 연구논문집 Vol.56 No.2

우리나라 시설원예지에서 유효불소 함량에 대한 토양유기물의 상대 기여도를 구명하고자 경기, 충남, 경북, 제주도에서 채취한 시설원예지 토양을 공시하여 얻은 결과는 다음과 같다. 1. 시설원예지의 유효불소 함량은 최저 0.17ppm, 최고 2.24ppm이었고, 육지토양이 0.93±0.62 ppm이었고 제주도 토양은 0.41±0.20ppm이었다. 2. 토양유기물의 함량은 최저 0.46%, 최고 15.20%이었으며, 평균함량은 육지토양이 1.93±1.21%이었고, 제주도 토양은 13.4±1.95%로 육지토양보다 높았다. 3. 표토의 유기물 함량과 유효불소함량 간에 육지토양은 고도의 유의성(r=0.6440**)있는 정상관이었으나, 제주도 토양은 유의성(r=0.5024)이 없었다. 4. 토양유기물이 1단위 증가함에 따라 붕소의 함량은 육지토양이 1.1596 ppm, 제주도 토양은 0.0392 ppm씩 통계적으로 증가하는 경향이었다. 5. 유효붕소 함량에 대한 토양유기물의 기여도는 유기물의 함량이 적은 육지토양에서 높았고, 유기물의 함량이 많은 제주도 토양은 낮았다 This study was conducted to identify the contribution ratio of soil organic matter for an available boron content in plastic film house soils which were obtained from the soils of Gyeong-gi, Chung Nam, Gyeong Buk and Jeju areas. The results are summarized as follows; 1. Available boron content in plastic film house soils was from 0.07 ppm to 2.24 ppm, average content was 0.93±0.62 ppm(inland soils) and 0.41±0.20ppm(Jeju soil), respectively. 2. The content of organic matter was from 0.46% to 15.20% average content was 1.93±1.21%(inland soil) and 13.4±1.95%(Jeju soil), respectively. 3. The inland soils between organic matter content and available boron content showed a highly positive correlation coefficiency (r=0.6440**), while Jeju soil was positive correlation coefficiency (r=0.5024). 4. The content of available horon, as increasing 1 unit of soil organic matter, was increased as 1.1596 ppm in inland soils, while it was increased as 0.0392 ppm in Jeju soil. 5. The contribution ratio of soil organic matter for avaiable boron content was high in inland soils, which have low content of ofganic matter, while it was low in Jeju soil containing a high content of organic matter.

銀杏나무의 葉先端壞死 現狀과 發生 原因에 관한 硏究

李在奭 대구효성가톨릭대학교 1992 연구논문집 Vol.44 No.1

This study is to examine leaf marginal necrosis and its cause in ginkgo biloba which occurred in growing period. The result of this study is summarized as follows. 1. Marginal necrosis of its leaves occurred between early August and even early September. Leaves of abnormal tree were changed 샘 yellowish green. At first symptom their leaf margins came to chlorsis which resulted in necrosis. As a result, these necrotic leaves were fallen earlier than those of normal ginkgo tree. 2. Leaves of necrotic ginkgo tree contained less content of chlorophyll on June and August. Its leaf area was also samller. 3. Ginkgo biloba with necrosis of its margins showed less content of bases such as K, Ca and Mg in soil, while the ratio of Mg/K and Ca/K was higher. 4. Soil of ginkgo tree with necrotic leaves contained less content of T-N, P₂ ?? K₂O in its blade. In particular, its ratio of K₂O/T-N was 0.41 while the ratio of normal ginkgo was 0.60. 5. In addition, there was no any regular tendency between nutrients contained in leaves and physico-chemical properties of soil. In conclusion, it seems that necrotic leaves of ginkgo were mainly caused by unbalanced absorption of all nutrients, due to environmental factors of soil.