NaOCI 및 GA 침지처리가 고추종자의 발아에 미치는 영향

전대우(Jun Dae Woo),구자형(Ku Ja Hyeong),이영복(Lee Young Bok) 한국원예학회 1996 한국원예학회 학술발표요지 Vol.14 No.2

Sodium Hypochlorite 處理가 시금치 種子發芽에 미치는 影響

具滋馨(Ku Ja Hyeong),金泰日(Kim Tae Il),全大雨(Jun Dae Woo) 한국원예학회 1996 Horticulture, Environment, and Biotechnology Vol.37 No.3

외경 0.25 ㎜ 동맥의 단단 및 단측문합법

전대우,정재홍,강진성,한기환 大韓成形外科學會 1989 Archives of Plastic Surgery Vol.16 No.3

Microvascular surgery has rapidly developed in the last 30 years and vessels of 1.0 mm can be anastomosed easily with a patency rate over 90 percent and is widely used in clinical practice with remarkable success. To obtain more successful microvascular anastomosis in smaller vessels, the improvement in methods of microanastomosis, the development of microvascular instruments including the operating microscope along with microsutures, and anticoagulants are needed. These improvements made microvascular anastomoses of vessels that are less than 0.5mm in extemal diameter possible. Huang et al.? performed anastomoses of the vessels in rats with an external diameter of 0.2 mm using a high magnification operating microscope, specially designed microinstruments, and fine sutures, and achieved a patency rate of 76 percent in the second postoperative week. However, we tried to anastomose vessels with an external diameter of 0.25 mm with ordinary instruments and 11-0 nylon. Animal studies on 180 rats were carried out by doing end-to-end anastomoses and 180 end-to-side anastomoses. In the end-to-end and end-to-side anastomoses, each 180 rats were then divided into 3 groups each. Group A was the control group. Aspirin and persantin were given orally in group B. Ticlopidine hydrochloride was given orally in group C. The method of end-to=end anastomosis was as follows : A superficial epigastric artery as small as 0.25 mm in diameter was severed transversely and longitudinal incisions, the length of the arterial diameter, were made down opposite sides of each end. Each flared fragment of the proximal end is approximated with each distal end and sutured together by only two stitches. The method of end-to-side anastomosis was as follows. In the side of the femoral artery an elliptical hole was made the same length of the circumference of the superficial epigastric artery, then the superficial epigastric artery was incised in the same manner as the end-to-end anastomosis. The flared ends of the superficial epigastric artery were then inserted into the hole of the femoral artery and sutured by four stitches. Light microscopic and scanning electron microscopic observation was performed serially at 3 days, 2 weeks, 3 weeks after the microvascular anastomosis for studying change of vessel diameter and histopathological changes at the microvascular anastomotic sites. The results were as follows : 1. The patency rate for the end-to-end anastomoses in the third postoperative week was 25% in the control group(A), 35% in the aspirin-persantin group(B), and 40% in the ticlopidine group(C) ; in the end-to-side anastomoses, 45% in group A, 50% in group B, and 60% in group C. 2. In the patency rate, the ticlopidine group is slightly higher than the aspirin-persantin group and even higher than the control group (P<0.05) in the end-to-end and end-to-side anastomoses. However, the end-to side group is higher in all 3 groups than the end-to-end one (P<0.1). 3. The intimal regeneration in all arteries was completed at end of the third postoperative week in the end-to-end and end-to-side anastomoses. 4. Changes of the internal diameter in anastomosed vessels showed luminal narrowing in the vessels at the third postoperative day and still narrowing at the second and third postoperative week in the end-to-end anastomoses. However, initial postoperative widening continued into the third postoperative week in the end-to-side anastomoses. The authors got a high success rate of anastomoses of very small arteries approximately 0.25 mm in external diameter, by developing a method of using an ordinary microscope and instruments, 11-0 nylon suture, and the administration of ticlopidine hydrochloride which is a more powerful anticoagulant than aspirin-persatin.

관골골절의 새로운 외부견인법

전대우,한기환,강진성 大韓成形外科學會 1989 Archives of Plastic Surgery Vol.16 No.5

In the modern era of increasing motorization and industrialization, traffic and industrial accidents are becoming more frequent and serious, which in turn have brought about an increase in facial bone fractures and the pattern of fractures have become more compound and comminuted. The malar eminence is so prominent in oriental people that the zygomatic bone is more frequently fractured than other facial bones. Even a markedly depressed zygomatic fracture can be well reduced with three point interosseous wire fixations including a zygomaticomaxillary buttress, a late depression of the malar eminence occurs frequently due to the pull of the masseter muscle. In order to antagonize the pull of the masseter muscle the authors have devised a new method of external traction using an Ⅳ pole and weights which were all available on the wards. Fifty-seven patients who were admitted at Keimyung University Dong-San Medical Center from November 1987 to August 1988, were treated with 3 point interossous wire fixations and myotomy of the insertion of the masseter muscle. Of the 57, 32 were then managed with the authors' external traction method and the remaining 25 were managed with external traction using Georgiade's halo apparatus. The following results are obtained by comparing our method to Georgiade's : 1. Although the authors' external traction method tends to produce a slight overcorrection(P〉0.05), the results should be improved with experience. 2. Advantages of the authors method are as follows: 1) There is no cost because all needed equipments are obtainable on the wards. 2) The traction apparatus can be easily assembled. 3) It does not annoy the patients and does not necessitate scalp wounds. 4) It is useful for treatment of the patients who have concomitant cranial or cervical bone fractures. 3. Disadvantages are: 1) The authors method is contraindicated in the patient who is not cooperative because the direction of traction can be varied. 2) There is a brief limitation of sustained traction whenever the patient is moved. In summary, the authors external traction method using an IV pole and weights can be used alone and/or as aid to Georgiade's halo apparatus in the post-operative management of depressed zygomatic fractures.

유기농업에 있어서 부숙된 가축분뇨의 연속시비가 토마토 생산 및 토양중 양분함량에 미치는 영향

구자형,전대우 忠南大學校 環境問題硏究所 2001 環境硏究 Vol.19 No.-

농가에서 실시되고 있는 유기농업의 문제점을 파악하기 위하여 2년 동안 플라스틱 하우스 내에서 돈분 및 돈분과 계분을 혼합한 유기물을 30, 60, 120ton·ha^-1씩 시비하고 관행재배(화학비료시비)와 생육상태 및 수량을 비교하고 토양분석을 통하여 무기성분의 변화상태를 조사하였다. 1. 토마토 초장은 화학비료 시비구와 부숙퇴비 시비간에 차이가 적었으나 엽록소 함량의 감소는 부숙퇴비 처리구에 화학비료 시비구에 비해 더 빠른 것으로 나타났다. 1년차재배포장에서 2년 연속재배 포장에 비하여 생육초기의 초장이 더 큰 결과를 보였으나 엽록소 감소폭은 두 포장간에 차이를 보이지 않았다. 2. 1년 재배 포장에서는 화학비료시비에 비하여 30-60ton·ha^-1의 부숙퇴비의 시비에서는 수량이 적었으나 120ton·ha^-1의 시비에서는 많은 수량을 보였다. 유기농 재배를 2년 연속 실시한 포장에서 처음 시작하는 1년차 재배포장에 비하여 대체적으로 수량이 10%이상 증가하는 경향을 보였다. 돈분단용 또는 돈분과 계분의 혼합시비에 따른 수량의 차이는 보이지 않았다. 3. 토양중 유기물 함량은 부숙퇴비의 시비량이 많아질수록 높았으며 120ton·ha^-1이 2년연속 처리되었을 경우 9% 정도에 도달하였다. 토양내 질산태 및 암모니아태 질소 함량은 1년차 재배포장에 비하여 2년 연속재배 포장에서 더 일찍 소실되었으며, 인의 함량은 두 포장간에 비슷하였고 계분이 함유된 퇴비의 시비에서 많은 함량을 보였다. 칼륨은 2년 연속재배 포장에서 많은 량이 검출되었고 대체적으로 감소폭도 완만하였다. 4. 칼슘과 마그네슘의 함량은 년차별 재배포장간에 차이가 없었고 pH와 EC도 별다른 차이를 보이지 않았다. 그러나 시비량이 많아질수록 EC가 높아지는 경향을 보였고 120ton·ha^-1의 부숙퇴비 시비에는 2-2.5mS·cm^-1이상의 높은 수준을 보였다. To improve the present organic farming practices in Korea, experiments for successive years in the plastic house were performed to compare the effects of composted swine manure alone, swine and fowl manure mixture with treatments of 30, 60, 120 tonㆍha_-1, and conventional farming practices on growth and yield in tomatoes. The contents of organic matter and mineral in soil were also studied throurgh a chemical analysis. Although little difference of plant height was found between chemical fertilizer and composted animal manure treatments, chlorophyll contents of plants were rapidly reduced in composted manure treatment. Between composted manure treatments in terms of 1 yr cropping field and 2 yrs cropping field, plant height at the early stage of growth was higher in the former field but there was no difference in chlorophyll loss. The total yields per plant of 1 yr cropping field with 30-60 tonㆍha_-1 of composted manure treatment were lower than that of chemical fertilizer treatment but not in the field of 120 tonㆍha_-1. There was a yield increase of more than 10% in 2 yrs cropping field of composted animal manure application than that of 1 yr cropping field but no clear difference was found between sources of manures. Organic matter contents of sojil were increased up to approximately 9% in 2 yrs cropping field applied with 120 tonㆍha_-1 of composted manures. Nitrogen contents of nitrate and ammonium types were rapidly decreased in 2 yrs cropping field than in 1 yr cropping ones. Even though the levels of phosphorous content were similar between cropping years, there was a tendency of higher phosphorous levels in the field applied with fowl manure in general. Potassium content was higher in 2 yrs cropping field and remained relatively at constant level during cultivation. No clear differences were found in contents of calcium and magnesium, pH and electrical conductivity (EC) regardless of cropping years. However, the level of EC was increased along with the increase of application amount of composted manures and that was ranged from 2.0 to 2.5 mSㆍ㎝_-1 in the field applied with 120 tonㆍha_-1.

발효퇴비 시용이 토마토의 생육 , 수량 및 토양중 양분변화에 미치는 영향

이영복,이종석,구자형,전대우,문창식 한국환경농학회 1998 한국환경농학회지 Vol.17 No.3

농가에서 실행되고 있는 유기농업의 실증적 연구를 위하여 돈분, 또는 돈분과 계분을 혼합하여 만든 발효퇴비를 10a 당 3, 6, 12ton씩 시비하고 다시 미생물제를 처리한 후 토마토의 생육, 수량 및 토양 중 양분의 변화를 조사하였던 바 다음과 같은 결과를 얻었다. 1. 토마토 초장은 퇴비 시용구에서 관행구에 비하여 길었으며 엽폭은 관행구에서 더 긴 것으로 나타났다. 엽록소 함량은 관행구에서 계속적으로 높은 값을 보였으며 퇴비 시용량의 차이에 따른 엽록소 함량의 차이는 정식 45일 후부터 아주 낮아지는 것으로 나타났다. 2. 미생물제를 사용하여 충분히 발효시킨 경우 12ton/10a의 시용에서 토마토의 수량이 관행구의 50-60%에 불과하였으나, 재배도중 추비하였을 경우에는 6ton/10a 시용구에서 관행구의 82%정도에 달하는 수량을 얻었다. 3. 일차 발효된 퇴비의 시용 후에 미생물제의 토양 살포는 질소성분의 빠른 유실을 초래하였으며 토양중 미생물의 밀도를 상당히 높혀주는 것으로 나타났다. 4. 과실의 색깔은 모든 퇴비 시용구에서 관행구에 비하여 붉은 색이 선명하게 나타났으며, 당도와 산도는 퇴비 시용량이 많은 12ton/10a 처리구에서 가장 높게 나타났으며, 경도는 관행구에서 유기물 시용구에 비하여 높게 나타났다. 5. 퇴비 시용구에서 NO₃-N와 NH₄-의 함량은 시용 직후에는 많은 양이 검출되었으나 급속히 감속되어 4-5주 후부터 아주 미량이 검출되었다. 그러나 인산, 칼륨, 마그네슘 및 칼슘의 함량은 서서히 감소되는 경향을 보였다. This study was focused on finding out the potential problems associated with organic farming system. The effect of composted animal manures subsequent inoculation of microbes on growth and yield of tomatoes (Lycopersicon esculentum Mill. `Minicarol' ) were examined to develop a proper organic farming practice. Plant heights were greater in composted manure treatment than in conventional practice, whereas widths of leaves were higher in conventional field. Chlorophyll contents between various amount of composted manure application were gradually decreased and showed no significant differences after 45 days of planting. The yield in the treatment applied 12 ton of composted animal manure per 10a as pre-planting fertilizer and following microbial inoculation were only 50-60% compared to that of conventional farming. However, yield increased up to 80% when additional composts were applied to the treatment received 6 ton of composted animal manure per 10a in the middle of cultivation. Microbial inoculation followed by composted manure application induced rapid decrease of nitrogen content in soil. However, the density of microorganisms was significantly increased. Tomatoes produced through organic farming were clear in color, Further, soluble solid and acid content were increased. The highest level of acid and solids were observed in the treatment applied 12 ton of digested swine manure per 10a. Although nitrogen content including ammonium and nitrate rapidly increased after application of composts, these were significantly reduced approximately 4-5 weeks after planting. The level of phosphorus, potassium, magnesium and calcium showed gradual decrease compared to nitrogen.