• 한국작물학회지
• /
• 제26권1호
• /
• pp.115-120
• /
• 1981

토양수분이 인삼생육에 미치는 영향을 조사하기 위하여 토경Pot(1/2000cm)에 묘삼을 이식하여 토양수분함량별 지상부 및 지하부 생육장황, 근수량과 지상부 형질과의 상호관계를 조사하여 다음과 같은 결과를 얻었다. 1. 인삼생육에 대한 토양의 적정수분 함량은 포장용수량의 65. 5%(절대수분 22.1%였고 생육이 정지되는 토양수분 함량은 포장용수량의 31.5%(절대수분 10.7%)였다. 2. 토양수분 함중이 적은 곳에서는 출아 및 전엽율이 상당히 지연되었으며 엽면적외 감소와 지상부 결주가 많아져 근수량이 현저히 감소되였다. 3. 근수량은 엽면적(r=0.91**) 경직경(r=0.76**) 경장(r=0.71**) 지상부생중(r=0.96**)간에 각각 정의 상기관계가 있었고 지상부 결주율(r=-0.77**) 간에 부의 상관관계가 있었다. 4. 생근중과 수분함량(r=- 0.80**)간에 부의 상관관계가 있어 수분이 충분한 곳에서 자란 인삼은 조직이 치밀함을 나타내었다.

• 대한방사선기술학회지:방사선기술과학
• /
• 제21권1호
• /
• pp.69-78
• /
• 1998

15Gy 선량의 방사선을 흰쥐의 위에 단일 조사하여 방사선 치료전 수반되는 금식이 비금식군과 금식군 간의 위 조직에 미치는 영향을 형태학적으로 관찰하여 다음과 같은 결론을 얻었다. 방사선 조사 후 1일 금식군에서 울혈현상과 상피 탈락현상이 관찰되었다. 방사선 조사 후 28일 금식군과 비금식군 모두 섬유화가 관찰되었으나, 금식군이 비금식군에 비해 더 많은 영역에서 섬유화가 관찰되었다. PAS 반응 양상에 있어서 방사선 조사후 7 및 14일군에서는 PAS 반응은 거의 없거나 매우 약했지만 28일군에서 비금식군은 정상군과 같은 반응 양상을 보였다. 본 실험에서 나타난 결과로 볼 때 금식군은 비금식군에 비해 고선량의 방사선에 대해 손상정도가 더 큰 것으로 나타났다.

• Nuclear Engineering and Technology
• /
• 제27권4호
• /
• pp.503-517
• /
• 1995

강제대류 천이비등 열유속을 보다 실제 적으로 예측하기 위한 역학적 모델을 개발하였다. 이 모델은 가열된 벽면 근처를 어떤 기포기둥(Vapor Blanket)이 통과할 때 일어나는 다단계 비등과정 즉, 임계 기포기둥의 형성, 기포기둥밑의 미소액막(Macrolayer)의 기화 및 고갈, 그리고 얇은 기체막에서 일어나는 불안정한 막비등과정에 기초하였다. 핵비등이탈점 (DNB )과 막비등이탈점 (DFB)사이의 천이비등 곡선상의 열유속은 임계 기포기둥이 주어진 벽면을 통과할 동안 상기한 각 비등과정의 지속 시간비(Time Fraction)를 각 비등열유속에 곱한 후 그것을 합하여 정량화하였다. 이 모델의 예측치를 현재까지 발표된 문헌들에 나타난 실험치와 비교한 결과, 본 모델은 저건도 및 10 bar 근처의 고압조건의 실험치를 잘예측하는 것으로 나타났다.

• Journal of Chest Surgery
• /
• 제3권2호
• /
• pp.91-106
• /
• 1970

Two groups of left pulmonary-subclavian artery anastomosis were done in 26 adult mongorel dogs. For the first group. the distal end of the subclnvian artery was nnastomosed to the side of the left pulmonary artery, and for the second group, the subclavian end wns anastomosed to the proximal end of the left lower lobe pulmonary artery. Among them, 6 died of bleeding or anesthetic failure during the day of operation, 10 survived 1 to 106 days and the other 10 were sacrificed at various interval. To investigate the relationship between hemodynamic stress and temporal evolution of the pulmonary vascular lesions. the pulmona try and femoral artery pressures, arteriogram and pathohistological specimens were obtained. The following results were obtained. 1. The postoperative pulmonary artery pressures were within normal limits except 2 dogs in the first group, but in nil 12 dogs of the second group, they were in moderate to maked pulmonary hypertension level. 2 After subclavian pulmonary anastomosis, both groups dogs showed increased femond artery pulse pressure. 3. The pulmonary vascular changes were more severe and appeared earlier in the second group dogs compared with the first group.4. The earliest vascular changes appeared in the media of the small muscular arteries and arterioles. 5. Various vascular chaDges were produced in 2 or 3 months. Thereafter, the changes were stationary. 6. Among the first group, two long-term servivors (No. 705 & 713) which had normal pulmonary artery pressure under the anesthesia, also showed various vascular changes as other pulmonary hypertensive dogs. 7. In the early stage medial hypertrophy. interruptio~l of elastic lamellae were found in the small muscular arteries and arterioles, which were followed by intimal proliferation and thrombosis. These findings may suggest some evidences of trauma to the vessels. 8. Pulmonary arteriograms showed irregularity of the intima of the large and medium sized arteries, abrupt ending of some of the small arteries and narrowing of the anastomosis.

• 마이크로전자및패키징학회지
• /
• 제27권4호
• /
• pp.113-117
• /
• 2020

논문에서는 고분자 나노구조 필름의 기계적 물성을 향상하기 위하여 광열효과를 이용한 열처리 공정을 응용하여 나노임프린트로 제작된 고분자 나노구조 필름의 기계적 물성에 미치는 영향을 규명하였다. Hybrid resin과 UV 나노임프린트을 이용하여 저반사 나노구조를 성형하고 IPL (intense pulsed light)를 이용하여 열처리를 수행한 뒤, 제작된 나노구조 필름의 투과율과 내스크래치성을 평가하여 나노구조의 성형성과 기계적 물성의 변화를 관찰하였다. 나노패턴의 특성에 의해서 나노구조의 투과율은 550 nm 파장에서 97.6%로 고투과율의 기능을 확인하였으며, IPL을 이용한 열처리를 진행한 경우 Hotplate를 이용한 열처리보다 경도는 0.51 GPa로, 0.27 GPa로 열처리한 시편에 비해 1.8배 향상하였으며, 동일 실험 조건에서 탄성율은 Hotplate 이용 시 4 GPa에서 IPL 이용 시 5.9 GPa로 1.4배 증가하였다.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2022년도 추계학술대회
• /
• pp.33-33
• /
• 2022

Rice (Oryza sativa L.) is a widely studied domesticated model plant. Seed awning is an unfavorable trait during rice harvesting and processing. Hence, awn was one of the target characters selected during domestication. However, the genetic mechanisms underlying awn development in rice are not well understood. In this study, we analyzed the genes for awn development using a mapping population derived from a cross between the Korean indica cultivar 'Milyang23' and NIL4/9 (derived from a cross between 'Hwaseong' and O. minuta). Two quantitative trait loci (QTLs), qAwn4 and qAwn9 were mapped on chromosome 4 and 9, respectively, increased awn length in an additive manner. Through comparative sequencing analyses parental lines, LABA1 was determined as the causal gene underlying qAwn4. qAwn9 was mapped to a 199-kb physical region between markers RM24663 and RM24679. Within this interval, 27 annotated genes were identified, and five genes, including a basic leucine zipper transcription factor 76 (OsbZIP76), were considered candidate genes for qAwn9 based on their functional annotations and sequence variations. Haplotype analysis using the candidate genes revealed tropical japonica specific sequence variants in the qAwn9 region, which partly explains the non-detection of qAwn9 in previous studies that used progenies from interspecific crosses. This provides further evidence that OsbZIP76 is possibly a causal gene for qAwn9. The O. minuta qAwn9 allele was identified as a major QTL associated with awn development in rice, providing an important molecular target for basic genetic research and domestication studies. Our results lay the foundation for further cloning of the awn gene underlying qAwn9.

• Clinical Nutrition Research
• /
• 제13권1호
• /
• pp.1-7
• /
• 2024

Nutritional support in critically ill patients is an essential aspect of treatment. In particular, the benefits of enteral nutrition (EN) are well recognized, and various guidelines recommend early EN within 48 hours in critically ill patients. However, there is still controversy regarding EN in critically ill patients with septic shock requiring vasopressors. Therefore, this case report aims to provide basic data for the safe and effective nutritional support in septic shock patients who require vasopressors. A 62-year-old male patient was admitted to the intensive care unit with a deep neck infection and mediastinitis that progressed to a septic condition. Mechanical ventilation was initiated after intubation due to progression of respiratory acidosis and deterioration of mental status, and severe hypotension required the initiation of norepinephrine. Due to hemodynamic instability, the patient was kept nil per os. Subsequently, trophic feeding was initiated at the time of norepinephrine dose tapering and was gradually increased to achieve 75% of the energy requirement through EN by the 7th day of enteral feeding initiation. Although there were signs of feeding intolerance during the increasing phase of EN, adjusting the rate of EN resolved the issue. This case report demonstrates the gradual progression and adherence to EN in septic shock patient requiring vasopressors, and the progression observed was relatively consistent with existing studies and guidelines. In the future, further case reports and continuous research will be deemed necessary for safe and effective nutritional support in critically ill patients with septic shock requiring vasopressors.

• 한국토양비료학회지
• /
• 제26권1호
• /
• pp.20-24
• /
• 1993

밭토양(土壤)에서 비료(肥料)의 장기(長期) 연용(連用)이 대맥(大麥)의 생육(生育) 및 수량(收量)에 미치는 영향(影響)을 구명(究明)코자 미사질(微砂質) 식양토(埴壤土)인 우평통(牛坪統)에 무비(無肥), P.K, N.K, N.P 및 N.P.K구(區)를 처리(處理)하여 1975~1990년(年)까지 16년간(年間)의 년차간(年次間) 수량변화(收量變化), 16년차(年次) 수확기(收穫期) 식물체(植物體) 부위별(部位別) 양분흡수량(養分吸收量) 및 토양성질(土壤性質) 변화(變化)를 조사(調査)한 결과(結果)는 다음과 같다. 1. 삼요소(三要素) 대조구(對照區)에 비(比)하여 각요소(各要素) 결제구(缺除區)의 수량감수정도(收量減收程度)는 P.K$P_2O_5$와 $K_2O$ 흡수량(吸收量)이 전처리중(全處理中) 가장 적었고 특(特)히 N와 $K_2O$의 흡수이용률(吸收利用率)은 부(負)의 수치(數値)를 보였다. 4. 시험후(試驗後) 토양분석결과(土壤分析結果) N.K 처리구(處理區)에서 토양(土壤) pH가 매우 낮았고, 또한 토양중(土壤中) $P_2O_5$, Ca, Mg 함량(含量)은 매우 적었으며, 16년간(年間) 평균토양중(平均土壤中) 인산(燐酸) 및 고토함량(苦土含量)과 대맥수량(大麥收量)과는 정(正)의 상관(相關)을 보였으나, 16년차(年次) 시험(試驗) 후(後) 토양중(土壤中) $NO_3-N$ 함량(含量)은 매우많은 반면(反面) 식물체(植物體) 질소(窒素) 및 기타(其他) 성분(成分) 흡수량(吸收量)은 매우 적었다.

• 아시안잔디학회지
• /
• 제1권1호
• /
• pp.7-17
• /
• 1987

The experiment with two levels of nitrogen (0. and 300kg / ha / year) and two levels of clipping height (1.5cm and 4cm) was conducted on the field during the period 3 June to 23 October 1985. Clonal lines of korean lawngrass ( Zoysia japonica Steud.) and manilagrass ( Zoysia matrella ( L.) Merr.)of Daejon origin were established in June, as individual clone in rows 30cm apart with a 40cm spacing between clones, actually 4 clones each plot. The results obtained were as follows : 1. When no nitrogen was applied to korean lawngrass, leaf blade which appeared during the August / early September period remained green for a period of about 10 weeks and even leaves emerged in late September lived for 42 days. However, leaf longevity did not exceed 8 weeks as nitrogen was applied. In contrast the leaf longevity of manilagrass which emerged during the mid - August / early September period was 11 weeks and, under the nitrogen applied, 9 weeks, indicating that the life - saen of individual leaf of manilagrass may be longer than that of korean lawngrass. Meanwhile, clipping height had no effect on the leaf longevity in both grasses. 2. During the July / August period, tiller number, green leaf number and DM weight of korean lawngrass were increased significantly with fertilizer nitrogen, but were not with two levels of clipping height. This trend was reversed after late September : no effect of nitrogen was appeared. Instead, lax clipping increased tiller number, green leaf number and DM weight. Green leaves stimulated by lax clipping resulted in the occurrance of more dead leaves in late October. 3. The increase of tiller number, green leaf number, and DM weight of korean lawngrass due to nitrogen application appeared to be of significance in early September. Unlike korean lawngrass, however, this significant increase was maintained to late October when new green leaves still emerge. Clipping height had little effect on the growth of manilagrass by early September, but since then, lax clipping stimulated leaf appearance, possibly resulting in a remained green color of manilagrass turf. 4. Among the stolons outgrown until early September, the primary stolon was not influenced by nitrogen and clipping treatments to produce only 2 - 3 stolons. However, 1st branch stolon as affected by nitrogen increased significantly, so most of stolons which occurred consisted of 1st branch stolon. 5. Until early September, stolon length obtained at nil nitrogen level was chiefly caused by lengthening the primary stolons. By applying nitrogen the primary stolons of korean lawngrass was longer than 1st branch stolons when severe clipping was involved and in turn, shorter than 1st branch stolons when lax clipping was concerned. In manilagrass, 1st branch stolons were much longer than the primary stolons when turf was clipped severely but in conditions of lax clipping, there was little difference in length between primary and 1st branch stolons. 6. Stolon nodes of both korean lawngrass and manilagrass were positively influenced by nitrogen, but no particular increases by imposing clipping height treatment was marked in manilagrass. Although the stolon of korean lawngrass was grown until late october, the growth stimulated by nitrogen was not so remarkable as to exceed that a by nil N. 7. The thickness of korean lawngrass and manilagrass was greatest in late September, but that of manilagrass did not differ significantly from that in late October. 8. The response of stolon length of korean lawngrass to lax clippings was not so great in late October as to that to severe clippings. On the other hand, the positive effect of lax clippings to stolon length in m anilagrass was confirmed even in late October.

• 한국육종학회지
• /
• 제51권3호
• /
• pp.190-200
• /
• 2019

벼의 Lipoxygenase-3 (LOX-3) 결핍은 벼의 저장 후 고미취 발생 저감에 효과가 있는 것으로 보고되었다. 우리나라 밥쌀용 품종의 저장 후 품질 향상을 위해 대면적 재배품종인 새누리 유전배경에 LOX-3가 결핍된 자포니카 근동질계통 개발을 위한 육종사업이 수행되었다. 1차 육종단계에서는 다우담을 LOX-3 결핍 수여친으로 활용하여 신동진과 1회 여교배 후 발색반응을 통해 LOX-3 결핍 계통을 선발하였고 약배양을 통해 조기에 고정계통 HR27873-AC12를 육성하였다. 2차 육종단계에서는 HR27873-AC12를 LOX-3 수여친으로 하고 새누리를 반복친으로 하여 1회 여교배 후 분자표지 선발과 농업형질에 대한 표현형 선발을 통해 HR28896-31-3-1-1 (이하 HR28896)를 선발하였다. 1, 2차 단계에서 육성된 HR27873-AC12와 HR28896 계통은 LOX-3가 결핍되어 있으나 재배품종으로 활용하기에는 열악형질이 수반되어 있었다. 3차 육종단계에서 HR28896계통과 새누리를 다시 교배하여 분자표지 선발과 표현형에 대한 강한 선발압을 적용하여 최종적으로 BC₂F₇세대 HR30960-186-2-1-2-1를 선발하여 전주624호로 계통명을 부여하였다. 분자표지 검정 결과 전주624호는 LOX-3가 결핍된 것으로 확인되었다. 전주624호는 중만생종으로 단간 내도복 직립초형에 벼흰잎마름병 및 줄무늬잎마름병에 저항성 계통으로 새누리와 농업형질 특성이 비슷하였다. 전주624호의 수량구성요소는 새누리와 대부분 같았으나 현미 천립중이 유의하게 감소하였고 수량성은 다소 낮았다. 전주624호의 외관품위는 새누리에 비해 좋았고 식미 특성은 비슷하였다. 406개 KASP 마커를 이용한 유전배경 분석 결과 전주624호는 새누리의 유전배경을 95.8% 회복하여 근동질계통으로 판단되었다. 전주624호는 새누리 품종 배경의 LOX-3가 결핍된 자포니카 근동질계통으로 최초 수여친인 다우담의 열약 형질 수반문제를 극복하였으며 새누리와 비슷한 농업형질 특성과 유전배경을 가지고 있어 저장 후 품질 향상을 위한 실용적인 재배품종, lox-3 도입을 위한 교배모본 및 유전자 효과 구명을 위한 유전재료로 활용될 것으로 기대된다.