Study on Leaf Production of Angelica acutiloba by Mulching with Polyethylene Film

Choi,Seong-Kyu,Yun,Kyeong-Won,Chon,Sang-Uk,Seo,Young-Nam,Seo,Kyoung-sun,Kwon,Byung-Sun 한국자원식물학회 2003 Plant Resources Vol.6 No.3

This study was conducted to produce effectively more leaves of Angelica acutiloba through year-round production system by using various mulching materials and polyethylene(PE) tunnel. Soil temperature by covering treatment was higher in PE mulching and PE tunnel than in rice straw mulching, especially showing the highest temperature in PE tunnel from April through May. Water content of soil was higher in PE mulching than in non-mulching. Leaf production of Angelica acutiloba through year-round production showed the highest in PE tunnel and root production in PE mulching. These results suggest that leaf production of Angelica acutiloba can be maximized through PE tunnel cultivation system.

Effect of Activated Charcoal on Growth of Zingiber mioga ROSC

Choi,Seong-Kyu,Yun,Kyeong-Won,Chon,Sang-Uk,Seo,Young-Nam,Seo,Kyoung-Sun,Kwon,Byung-Sun 한국자원식물학회 2004 Plant Resources Vol.7 No.2

Activate charcoal (AC) can be utilized as a soil conditioner in agricultural crop areas. This study was conducted to investigate the effect of AC on growth and yield of Zingiber mioga ROSC as affected by different amounts of AC. The results obtained are summarized as follows. Growth characteristics including plant height and leaf length were the highest when activated charcoal added with 10-30%, suggesting that optimum amount of activated charcoal was ranged from 10 to 30%. Growth and enlargement of the root were improved by 10% AC with higher rhizome length and weight.

디지털 제어에 의한 단상유도전동기의 범용 기동기 설계

최창주,서강성,박수강,조금배,백형래,임병옥 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2

Single phase induction motor(SPIM) is one of the most widely used type of low power AC motors in the world, especially for domestic or commercial applications where a three phase power supply is not available. Fractional horse power single phase induction motors have no starting torque their own. So there are several ways of starting single phase induction motors. The most common type is the starting capacitor installed in series with the auxiliary winding to increase the starting torque. Also, the auxiliary winding is disconnected once the speed of the motor reaches 70 to 80% of the rated speed. In the conventional systems, this function is conducted by a centrifugal switch. But the mechanical centrifugal switch has many problems such as switch malfunction. This paper presents the new methods of universal starting switch by digital controller to overcome these shortcomings of centrifugal switch.

Amylase가 Hydroxyapatite 탈회에 미치는 영향

서정택,이인환,최병재,이종갑 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.2

Salivary proteins which are produced in the saliary acinar cells have been known to be involved in the Calcium and phosphate metabolism. The acquired pellicle resulting from such metabolism is considered as a secondary defence membrane against tooth caries. In this respect, some proteins included in saliva probably play an important role in the prevention of demineralization in enamel. On the other hand, fluoride has long been known to prevent the demineralization of enamel by the inhibition of the growth of Streptococcus mutans (S.mutans) and by the chemical reaction with calcium and phosphate. therefore, I have examined the roles of amylase and albumin in the demineralization of enamel and compared these preteins with fluoride in terms of anticariogenic effect. 1. The demineralization caused by S. mutans occurred slowly and progressively for the first 60 min, then the rate of demineralization was accelerated afterwards. 2. pH decreased continuously during the entire period of each experiment. 3. the demineralization was significantly inhibited by the preteatment of amylase and fluoride but albumin had little effect on it. 4. An addition of 0.1 mM lactic acid (final concentration 0.1μM) caused a rapid increase in calcium concentration reaching a mazimum within 10 min. 5. pH decreased rapidly by the addition of 0.1mM lactic acid and reached a minimum within a few seconds followed by an increase in pH. pH reaced a plateu with 10 min. 6. Fluoride, amylase and albumin played little role in the 0.1 mM lactic acid-induced demineralization. 7. A slow infusion of 0.1 M lactic acid at a rate of 5 ㎕/min caused a slower increased I calcium concentration compared with the bolus addition of lactic acid. 8. Fluoride had an inhibitory effect on the calcium release caused by slow infusion of lactic acid while amylase and albumin had no effect on it. These results suggest that fluoride inhibits demineralization by protecting the HA from the acid attack whereas amylase has a direct effect on S. mutans to prevent demineralization.

정수처리 공정에서 철과 망간 잔류 농도에 관한 연구

최미리,서규태,문병현,이택순 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study was to investigate the cause of the color and turbidity in a small-scale water treatment plant using lakes water as water supply source. Water qualities in aqueducts, in depth of the lakes and in each process were measured. And effects of prechlorination on each unit operation in the water treatment, especially on iron and manganese removal, were studied. The concentration of iron and manganese was 0.13, 0.08 mg/L in the surface water and 1.93 and 0.433 mg/L in 15 m depth of the lake. Higher iron concentration of the inlet was measured to 5.35 mg/L which was caused by the steel aqueduct corrosion. The optimun coagulation dosages of Poly Aluminum Chloride(PAC) and Liquid Aluminum Sulfate (LAS) were 17.5 mg/L and 35 mg/L. Pretreatmnet of raw water with CaCOl improved the removal efficiencies of iron and manganes. However, more efficient method for removing iron and manganes was required.

特別한 Finsler 空間에서의 射影變換

崔殷瑞,金秉斗 嶺南大學校 基礎科學硏究所 1990 基礎科學硏究 Vol.10 No.-

The purpose of the present paper is to consider projective change under special Finsler spaces which are characterized by W-recurrent and D-recurrent space. Our main result is as follows: i) If a space F?? can be transformed into a W-recurrent space ?? by the projective change, then F?? must be W-recurrent if and only if the projective factor p(x,y) satisfies W??P? = 0. ii) if a space F? can be transformed into a D-recurrent space ?? by the projective change, then F? must be D-recurrent if and only if the projectivw factor P(x,y) satisfies D??P?=0.

抽水性 自生水生植物의 종자번식에 관한 연구

서병기,김광두,안영희,최광율 中央大學校 遺傳工學硏究所 1999 遺傳工學硏究論集 Vol.12 No.1

본 실험은 조경가치가 높은 자생수생식물들의 효과적인 실생번식방법을 알아보고자 실시하였다. 각 종자들은 15, 30, 45일간 냉장고(4℃)에서 저온처리를 하여 25℃로 고정된 plant growth chamber와 Incubator에서 실험한 결과 세모고랭이, 큰고랭이, 부들은 대조구에서는 전혀 발아가 되지 않았으나, 세모고랭이의 경우 30일간의 저온처리구에서 45%, 큰고랭이와 달뿌리는 45일간의 저온처리구에서 36.7%, 96.6%, 부들은 15일간의 저온처리구에서 65%가 발아하여 저온처리가 발아촉진에 우수한 효과를 나타내었으며 또한, 光 조건에서 발아가 촉진되는 경향을 나타내었다. In this study, we studied efficiently sexual propagation method of landscaping native aquatic plants. The results of study,-each seeds treated on cold chamber(4℃) during 15, 30, 45 days, and then growth in the plant growth chamber and incubator fixed 25℃- Scirpus triqueter, S. tabernaemontani, Typha orientalis did not germinated in control, but in cold treated for 30 days with Scirpus triqueter is germinated 45℃, cold treated for 45 days with S. tabernaemontani, Phragmites japonica is germinated 36.7%, 96.6%, and cold treated for 15 days with Typha orientalis is germinated 65%. So, cold treatment as showed high efficiency for germination, and activated of germination in light control.

퇴행성 슬관절염 환자의 증상 중증도 지표와 DITI의 상관성 연구

서병관,류성룡,강중원,안경애,이재동,최도영,김건식,이두익,이윤호,이상훈 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objectives : To investigate the applicability of thermography as severity measurement in the patients with osteoarthritis (OA) of the knee. Methods : Data were obtained from 80 patiens with OA of the knee. They were asked to answer two disease-specific questionnaire (Western Ontario and McMaster Universities (WOMAC) OA index, Lequesne's Functional Index (LFI)), one generic instrument (Korean Health Assessment Questionnaire (KHAQ)), VAS in order to assess the severity of disease, quality of life, degree of pain and taken thermography in standardized environment. Results : The thermal difference between ipsilateral side and contralaterla side of lateral aspect of knee was correlated with that of medial aspect of knee, and the thermal difference of anterior thigh was correlated with that of lateral, medial aspect of knee and patella region. Age, duration of disease, duration of morning stiffness, sex, crepitus, and painful side of knee were not correlated with the thermal differences of each region. LFI, WOMAC, WOMAC pain subscale, WOMAC stiffness subscale, WOMAC physical function, KHAQ,, VAS were not correlated with the thermal differences of each region. Conclusion : Further study on the thermography on OA of the knee in population with appropriate severity grade and the standardization of analysis of thermographic data were recommended.

단안 안검봉합에 의한 병아리 안구크기의 변화

최시환,김세윤,서병로,민병무 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2

In an attempt to elucidate the eyeball enlargement by eyelid suture, two-day old white Leghorn chickens (n=20) were lightly anesthetized with ether and monocular upper and lower eyelids were sutured together with 6-0 black silk. The other eye was used as control group. Refractive error, corneal curvature, or axial length by ultrasonography were assessed before the study, and 3 weeks and 6 weeks after lid suture. Dimensional changes, intraocular pressure, and weight of enucleated eyeball were measured at 6 weeks. The results of the study were as follows: 1. The eyelid sutured group developed significant axial elongation (11.00±0.36mm vs 10.69±0.24mm, mean±SD, by ultrasonography; 12.57±0.66mm vs 12.02±0.41mm by micrometer), equatorial length (15.48±0.45mm vs 15.32±0.48mm), and weight (1.51± 0.12g vs 1.39±0.09g) in comparison with control group. 2. Corneal sag and diameter, intraocular pressure, and refractive error were not significantly different between both groups. Our results support the hypothesis that form-vision deprivation induces the enlargement of eyeball, especially the posterior segment of the eyeball.

퇴행성 슬관절염에 대한 제통단의 안정성과 효능 임상연구

서병관,류성룡,강중원,안경애,이상훈,최도영,김건식,이두익,이윤호,이재동 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objectives : In order to investigate the efficacy and safety of the newly developed herbal medicine Jetongdan, a placebo-controlled randomized clinical trial of patients with osteoarthriotis of the knee was undertaken. Methods : Data were obtained from 80 patients with OA of the knee. After the enrollment, they were asked to answer a disease-specific questionnaire (Western Ontario and McMaster Universities (WOMAC) OA index) and analyzed with the erythrocyte sedimentation rate (ESR) in order to evaluate the efficacy of Jetongdan, and analyzed for aspartate transaminase (AST) level, alanine transminase (ALT) level, blood urea mitrogen (BUN) level, and creatinine (Cr) level in order to evaluate the safety of Jetongdan. Results : The liver function and renal function did not deteriorate after treatment with Jetongdan. Composite WOMAC score and physical function subscale was improved, but pain subscale, stiffness subscale, and ESR were not improved by Jetongdan. This was possibly because the baseline characteristics of the two groups were not homogenized after randomization. Conclusions : Jetongdan could be a promising treatment option for osteoarthritis of the knee. Further study in a larger population with appropriate severity grades is recommended.