치과교정환자의 치면세균막 관리교육 효과

손우성,김진범,제영지 대한치과교정학회 1994 대한치과교정학회지 Vol.24 No.1

The short-term effects of plaque control instruction were studied in 42 adolescent orthodontic patients under active fixed treatment. At first visit, all the patients were received plaque control instruction using materials such as oral hygiene education slides, dentiform, disclosing agents, tooth brush and interdental brush. After that, Pateints were asked to perform the tooth brushing according to instruction. Such a procedure was repeated every week for 3 weeks. Plaque index and bleeding index were scored once a week for 4 weeks and were compared according to ages, sex and duration with fixed appliance. The results were as follows : 1. Plaque control instruction was effective in reducing plaque accumulation and gingival inflammation of the orthodontic patients. 2. The effect of plaque control instruction was continued during 3 weeks among all groups of subjects, and it was prominent at the first week. 3. There was no statistically significant difference in the effects of the plaque control instruction according to sex, ages, or duration with fixed appliances.

콩의 개화기 전후 공급과 수용부위의 생장반응과 수량에 대한 질소의 효과

박재홍,송범헌,이철원,손석용,김홍식,박상일 忠北大學校 農業科學硏究所 2002 農業科學硏究 Vol.19 No.-

This study was conducted to examine the nitrogen effects on the growth responses, the nodulation, and the distribution of dry weight of plant tissues at major growth stages before and after the flowering stage, and to evaluate the yield components and yields with different nitrogen levels. Hwangkeum cultivar(Glycine max L mereill) was cultivated under five different nitrogen levels, 0, 2, 4, 6, 8, N Kg/10a. Stem length and branching number, which were investigated with different N levels at major growth stages, were rapidly increased for 14days for before and after the flowering stage compared to the other growth stages. They were clearly higher with treatment of 2 and 4 N kg/10a than those of other N treatments. Pod number was slightly increased from the flowering to beginning maturity. It was the highest in the treatment of 2 N Kg/10a. Comparing grain number per pod with different N levels, two grains per pod was much higher in all N treatments except for the treatment of 6 N Kg/10a. Dry weight of shoot(including leaf, stem, and pod) was rapidly increased from the flowering stage to the full seed stage and then gradually increased after the full seed stage, whereas the dry weight of root(including the nodule and root) was rapidly increased until to full pod stage and then linearly decreased from the full pod stage until the beginning maturity stage. Comparing dry weight with different N levels, the dry weight of shoot was the highest in the treatment of 4 N Kg/10a, while it of root was the highest in the treatment of 2N Kg/10a. The dry weight of nodule was the highest, 13.1 Kg/10a, at full pod stage. Comparing the dry weight of nodule with different N levels, it was increased to the application amount of 4 N Kg/10a and then clearly decreased with more application amount of N than 4 Kg/10a. The yield components which were mostly affected to the yield were pod number per plant and grain number per plant. They were 57.5 and 106.1, respectively, with treatment of 4 N Kg/10a, which showed the highest yield, about 266 Kg/10a. Comparing yield index with different N levels to the control, the yields with treatment of 2 and 4 Kg/10a were increased to 21% and 34%, respectively.

콩의 개화기전후 공급과 수용부위의 무기영양성분함량 및 흡수량에 대한 질소의 효과

박재홍,송범헌,이철원,손석용,김홍식,박상일 忠北大學校 農業科學硏究所 2002 農業科學硏究 Vol.19 No.-

This study was conducted to examine the nitrogen effects on the uptaken amounts and utilization of mineral nutrients between source and sink tissues at major growth stages before and after the flowering stage with different nitrogen levels Hwangkeum cultivar(Glycine max L Mereill) was cultivated under five different mtrogen levels, 0, 2, 4, 6, 8 N kg/10a Comparing contents of total-N with different plant tissues at major growth stages before and after the flowering, total-N contents of leaves was gradually decreased from the flowering to the beginning maturity, while it of pod was continuously increased from the full seed to the beginning maturity Total-N content was higher in the treatment of 4 N Kg/10a that those of others The uptaken amount of N determined with different growth stage was rapidly increased maturity Higher proportion of uptaken N were into the leaves at the full seed stage, and they were transported from the leaves into pod at the beginning maturity stage Comparing major mineral elements of the leaves and the pod with different N leaves, in case of the leaves, the content of Fe, Mn, and Zn was decreased throughout the growth stages, whereas the content of Ca and Mg was decreased from the flowering to the full seed and then it was increased after the full seed stage In case of pod, the content of K, Fe, Mn, Zn, and Na was decreased from the flowering to the beginning maturity, while contest of Mg was increased.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

[CE-0004] Development of waterlogging tolerance corn variety using wild corn Teosinte

Jae-Han Son(Jae-Han Son),Young-Sam Go(Young-Sam Go),Hwan-Hee Bae(Hwan-Hee Bae),Beom-Young Son(Beom-Young Son),Seonghyu Shin(Seonghyu Shin),Tae-Wook Jung(Tae-Wook Jung) 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-

Variety of Maize for Grain with Stable Production Capability 'Suanok'

Hwan Hee Bae(Hwan Hee Bae),Jun Young Ha(Jun Young Ha),Young Sam Go(Young Sam Go),Jae Han Son(Jae Han Son),Beom Young Son(Beom Young Son),Tae Wook Jung(Tae Wook Jung) 한국육종학회 2023 한국육종학회 공동학술발표집 Vol.2023 No.-

Selection of Wet-resistant Silage Corn Hybrids by Variations of Leaf Fluorescence after Excess Water Treatments in Early Growth Stage

Young-Son Cho,Beom-Young Son 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.1

본 시험은 사일리지용 옥수수 교잡종을 인공기상실에서 온도조건 시험 1) 21±3oC와 시험2) 24±3oC에서 포트를 사용하여 수행하였다. 인공강우 첫째 날은 100 mm를 관수하였고 둘째 날 이후부터는 50 m씩 관수하였으며 시험 1에서는 3엽기부터 시험 2)는 5엽기부터 관수를 시작하였다. 본 시험에서는 습해저항성을 포장상태가 아닌 포트재배조건에서 미리 평가하여 선발을 용이하게 하고 선발기간을 단축하기 위하여 수행하였다. 본 시험의 결과를 요약하면 다음과 같다. 시험 1)에서는 관수처리 5일차에 형광의 변화가 급격하여 옥수수 자원간에 범위가 매우 크게 나타나 분류에 매우 유리하였다. 시험 2)의 5엽기 관수처리조건에서는 옥수수 자원간에 형광값의 범위가 작았다. 관수 처리 후 건조 시일의 경과에 따라 형광값의 상승효과가 나타나 토양이 건조시에는 내습성 자원선발에는 다소 불리하였다. 3엽기 관수처리는 건조를 하여도 형광값의 상승이 적어 회복이 어려웠다. 5엽기 관수처리는 관수처리에 따른 형광값의 변화가 늦어 건조 후 회복속도가 매우낮았다. 옥수수 습해 처리에 따른 내습성 계통 선발은 비파괴적인 방법으로 생육 초기에 간단한 형광 측정에 의한 내습성구분이 가능하였다. Two pot experiments were conducted in a phytotron to evaluate and select a wet-resistant silage corn hybrids from 111 corn hybrids (CHs) under simulated heavy rainfall of 100 mm for the 1st day and 50 mm from the 2nd day at the 3rd and 5th leaf stages in experiments 1 and 2, respectively. All CHs were tested under a rainfall of 280 mm for 5 days followed by irrigation treatment that started 38 days after seeding at 21±3 in experiment 1 and 44 days at 24±3 in experiment 2. Physiologically, the value of leaf fluorescence for normal corn growth is above 0.85 and more than 0.75 for re-growth after wilting, while no re-growth when it is lower than 0.70. Thus, measurement of leaf fluorescence at the initial stage of growth after water submersion is considered a useful criterion for the selection of CHs that are resistant to excess water stress. Values of leaf fluorescence (FLU) rapidly decreased after water irrigation in both temperature ranges; however, the recovery speed was faster in the irrigation treatment of 5th than 3rd leaf stage. In conclusion, we recommend that selection criteria of CHs at the early 3rd leaf growth stage with 5 days water treatment should be compared based on overcoming speed of FLU, which is one of useful and non-destructive physiological methods at this 3rd leaf stage compared with 5th leaf stage.

Selection and Relationships between Growth Characteristics of Silage Corn after Excess Water Treatment in Early Growth Stage

Young-Son Cho,Byeong-Jin Lee,Daniel Son,Rashid Ismael Hag Ibrahim,Beom-Young Son 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.3

옥수수 교잡종 111종의 습해저항성과 생육특성을 규명하기 위하여 인공기상동에서 3엽기에 인공강우 조건(1일차 80 mm, 이후 50 mm, 온도 21±3oC) 에서 본 시험을 수행하였다. 조사항목은 생육특성으로서 지상부, 뿌리, 엽신의 건물중을 조사하였으며 식물체의 중심고, 간직경을 측정 하였다. 교잡종 중에서 62번이 간장이 가장 길었으며 96번이 가장 짧았다. 무게중심고는 96번이 가장 컸으며 88번이 가장 짧았다. 건물중은 59번이 가장 무거웠으며 25번이 가장 낮았다. 간직경은 91번이 가장 두꺼웠으며 24번이 가장 가늘었다. 엽신건물중은 42번이 가장 컸고 25번이 가장 낮았다. 뿌리 건물중은 16번이 가장 높았고 24번이 가장 낮았다. 엽신건물중은 85번이 가장 높았고 25번이 가장 낮았다. 각 항목별 상관을 구한결과 간직경, 초장, 뿌리건물중은 엽신건물중과 정상관을 나타냈고 간직경과 초장은 뿌리건물중과 정상관을 보였으나 초장과 무게중심고는 부의 상관을 보였다. 무게중심고와 간직경 또는 간직경은 뿌리건물중과 상관을 보이지 않았다. A pot experiment was conducted in a phytotron to evaluate and select wet-resistant silage corn from 111 corn hybrids (CHs) under simulated heavy rain falls (80 mm for the 1st day and 50 mm from the 2nd till 11th day at 21±3oC) started at the 3rd leaf stage or 28 days after seeding. Growth related characteristics including dry weight of shoot, root, and leaf blade as well as leaf area, plant weight balance, and culm diameter were evaluated. Corn hybrid (CH) no.62 showed the tallest plant height and no.96 was the shortest. CH no.96 expressed the highest weight balance and no. 88 was the lowest. CH no. 59 gave the highest dry weight of shoot and no. 25 was the lightest. CH no.91 measured the thickest culm diameter at the basal 10 cm but no.24 was the thinnest. Dry weight of the basal 10 cm from culm was heaviest in no. 42 and lightest in no.25. Dry weight of root was highest in no.113 and lowest in no. 16. Dry weight of leaf area was heaviest in no.85 but lightest in no. 25. Analysis of coefficient of correlation positively connected culm diameter, plant height, and root weight to leaf area as well as culm diameter and plant height to root weight, while plant height and weight balance were negatively correlated. Weight balance to culm diameter or leaf area and culm diameter to root weight was not related.

Relationship of the Lodging of Corn Hybrids and Wet Stress in Field Condition

Young-Son Cho,Byeong-Jin Lee,Daniel Son,Young-Hwan Yoon,Won-Ha Yang,Jong-Ho Seo,Chung-Kook Kim,Beom-Young Son 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4

포장조건에서 22종의 옥수수교잡종을 과습조건에서 도복관련형질들의 상호관련성을 검정하였는데 좌절중 (1.0 m, 1.5 m)과 좌절부위등을 평가하였고 주요한 도복 저항성 형질인 좌절중, 간직경, 뿌리건물중, 중심고등의 상호 관련성을 함께 평가하였다. 본시험은 포트시험에서 일차 스크린 한 것을 논에 경사지를 만들어 경사지별로 수분함량과 도복저항성을 비교하기 위하여 관수시기(과습조건)를 파종후 20일, 5엽기, 출웅기, 출사기로 구분하였고 관수량은 100 mm/일 씩 5일간 처리하였으며 조사는 수확기에 수행 하였다. 본시험의 결과 출사기에 1.0 m, 1.5 m 높이에서 좌절중과 중심고는 정의 상관을 보였으며 파종후 20일차에 관수처리구에서는1.0m, 1.5m 모두 좌절강도와 간직경이 정의 상관을 나타냈다. 관수처리 5엽기에서는 높이 1.0 m에서 좌절강도와 간직경간의 강한 정의 상관을 나타냈으며 도복관련 형질인 간직경, 뿌리건물중,지상부 중심고, 좌절중, 좌절고등이지만 관수처리시 이들을 가장쉽게 판별 할 수 있는 방법은 5엽기에 관수처리구가 가장 효율적으로 사료된다. Under field conditions, 22 corn hybrids(CHs) were tested for several characteristics related to lodging resistance and excessive water stress, such as pushing resistance on 1.0 and 1.5 m hights of the corns and breaking point. The 22 corn CHs were selected because they showed strongest pushing resistance and breaking resistance of culm as well as the highest thickness of basal culm, leaf greenness, leaf area, and plant height based on two pre-pot experiments performed in phytotron. To make excess water condition, water irrigation was done at 1) 20-d after seeding, 2) 5th leaf stage, 3) tasseling stage, and 4) silking stage with 100 mm/day for 5 days. Lodging-related characteristics were measured: culm diameter, root dry weight, weight balance of above-ground plant, breaking resistance, and breaking height in field experiment. Among all the characteristics tested, we explained in the two critical points for lodging resistance: 1) breaking resistance and breaking point, 2) culm diameter with breaking resistance and breaking point, and they were further evaluated for the relationships with the 1.0 and 1.5m height of above-ground plant. In the corn hybrids, there was a positive correlation between breaking resistant and weight balance of corn at the silking stage water treatment at 1.0 and 1.5-m height. And breaking resistant and culm diameter had a positive relationship at the 20-d water treatment at both measuring height. In conclusion, selection for lodging resistant hybrids or germplasms to excess soilwater should be made at the 5th leaf stage water treatment, and basal culm thickness should be considered to evaluate the resistance of the corn hybrid plants to lodging.

포장에서 교잡종 옥수수의 도복과 수분스트레스간의 관계

조영손 ( Young Son Cho ),이병진 ( Byeong Jin Lee ),손다니엘 ( Daniel Son ),윤영환 ( Young Hwan Yoon ),양원하 ( Won Ha Yang ),서종호 ( Jong Ho Seo ),김충국 ( Chung Kook Kim ),손범영 ( Beom Young Son ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4

Under field conditions, 22 corn hybrids(CHs) were tested for several characteristics related to lodging resistance and excessive water stress, such as pushing resistance on 1.0 and 1.5 m hights of the corns and breaking point. The 22 corn CHs were selected because they showed strongest pushing resistance and breaking resistance of culm as well as the highest thickness of basal culm, leaf greenness, leaf area, and plant height based on two pre-pot experiments performed in phytotron. To make excess water condition, water irrigation was done at 1) 20-d after seeding, 2) 5th leaf stage, 3) tasseling stage, and 4) silking stage with 100 mm/day for 5 days. Lodging-related characteristics were measured: culm diameter, root dry weight, weight balance of above-ground plant, breaking resistance, and breaking height in field experiment. Among all the characteristics tested, we explained in the two critical points for lodging resistance: 1) breaking resistance and breaking point, 2) culm diameter with breaking resistance and breaking point, and they were further evaluated for the relationships with the 1.0 and 1.5m height of above-ground plant. In the corn hybrids, there was a positive correlation between breaking resistant and weight balance of corn at the silking stage water treatment at 1.0 and 1.5-m height. And breaking resistant and culm diameter had a positive relationship at the 20-d water treatment at both measuring height. In conclusion, selection for lodging resistant hybrids or germplasms to excess soilwater should be made at the 5th leaf stage water treatment, and basal culm thickness should be considered to evaluate the resistance of the corn hybrid plants to lodging.