• Applied Biological Chemistry
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• 제11권
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• pp.167-171
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• 1969

마늘(Allium Sativum L.) 재배(栽培)에 있어서 몇가지 환경조건(環境條件) 즉 통기조건(通氣條件)(완전통기(完全通氣) 및 불완전통기(不完全通氣)) 및 시비량(施肥量)(다비구(多肥區), 관구(慣行區) 및 무비구(無肥區))을 달리했을때 마늘의 생육(生育) 및 인산흡수(燐酸吸收)(표식중과석(標識重過石))에 미치는 영향(影響)을 조사(調査)하였다. 1) 생장(生長)에 있어서 비료(肥料)의 시용수준(施用水準)에 관계(關係)없이 불완전통기구(不完全通氣區)가 초장(草長)이 길었다. 2) 생체중(生體重)은 초장(草長)과 비슷한 경향(傾向)을 보였으나 건물중(乾物重)은 처리간(處理間)에 차이(差異)가 없었다. 3) 인산흡수(燐酸吸收)는 불규칙(不規則)하나마 불완전통기구(不完全通氣區)가 전체적(全體的)으로 증가(增加)하는 경향(傾向)을 보였다. 이상(以上)으로 볼때 마늘의 생육(生育) 및 구(球)의 발육(發育)에 있어서 불완전통기(不完全通氣)가 좋은 결과(結果)를 가져왔다.

• 대한기계학회논문집B
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• 제29권5호
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• pp.633-642
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• 2005

Nucleate pool boiling experiments for R11 under a constant wall temperature condition were carried out. A microscale heater array was used for the heating and the measurement of high temporal and spatial resolution by the Wheatstone bridge circuit. Very sensitive heat flow rate data were obtained by the control for the surface condition with high time resolution. The measured heat flow rate shows a discernable peak at the initial growth stage and reaches an almost constant value. In the thermal growth region, bubble shows a growth proportional to $t^{\frac{1}{5}}$. The bubble growth behavior is analyzed with a dimensionless parameter to compare with the previous results in the same scale. As the wall superheat increases, the departure diameter and the departure time increase, and the waiting time decreases. But the asymptotic growth rate is not affected by the wall superheat change. The effect of the wall superheat is resolved into the suggested growth equation. Dimensionless parameters of time and bubble radius characterize the thermal growth behavior well, irrespective of wall condition. The comparison between the result of this study and the previous results shows a good agreement at the thermal growth region. The quantitative analysis for the heat transfer mechanism is conducted with the measured heat flow rate behavior and the bubble growth behavior. The required heat flow rate for the volume change of the observed bubble is about twice as much as the instantaneous heat flow rate supplied from the wall.

• Korean Journal of Mathematics
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• 제18권3호
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• pp.277-288
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• 2010

We consider the nonlinear biharmonic equation with coefficient exponential growth term and Dirichlet boundary condition. We show that the nonlinear equation has at least one bounded solution under the suitable conditions. We obtain this result by the variational method, generalized mountain pass theorem and the critical point theory of the associated functional.

• Korean Journal of Mathematics
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• 제23권3호
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• pp.379-391
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• 2015

We investigate the existence of solutions of the nonlinear biharmonic equation with variable coefficient polynomial growth nonlinear term and Dirichlet boundary condition. We get a theorem which shows that there exists a bounded solution and a large norm solution depending on the variable coefficient. We obtain this result by variational method, generalized mountain pass geometry and critical point theory.

• Korean Journal of Mathematics
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• 제16권3호
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• pp.389-402
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• 2008

We show the existence of at least two solutions for a class of systems of the critical growth nonlinear suspension bridge equations with Dirichlet boundary condition and periodic condition. We first show that the system has a positive solution under suitable conditions, and next show that the system has another solution under the same conditions by the linking arguments.

• 한국세라믹학회지
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• 제27권8호
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• pp.1050-1054
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• 1990

Rutile(TiO2) single crystals were grown by FZ method. Feed rod was sintered in the longitudinal tube-shaped furnace at 135$0^{\circ}C$ and optimum growth condition was growth rate 5-8mm/hr, rotation rate 30-40rpm. When crystal was growing, atomosphere was oxidized condition, and grown single crystal was annealed at 110$0^{\circ}C$. The rutile single crystals were oriented to [001] direction and color change of single crystals were related to atmosphere, and difference of electric conductivity and resistance was due to the fact above.

• 한국잡초학회지
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• 제16권3호
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• pp.230-236
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• 1996

다양한 재배양식하에서 재배된 벼와 피에 파종 및 이앙후 5일째에 bensulfuron 102g ai/ha를 토양처리하여 그들의 생장 및 해부학적 반응차이를 구명하고자 온실내에서 pot 시험으로 수행되었다. 초장, 근장, 지상부 및 지하부 생체중을 조사한 결과, 건답직파벼 및 이앙벼의 생장 및 발육은 무처리와 유사하거나 증가하는 경향을 보였으나 담수직파벼는 무처리에 비해 심하게 억제되었으며, 지상부보다는 지하부가 더 심하게 억제되었다. 한편 피는 건답조건 에서 억제정도가 다소 낮게 나타났으나 담수조건에서는 치명적으로 억제되었다. Bensulfuron에 의한 주요한 해부학적 반응은 건답직파조건의 피에서만 엽시원체의 위축 및 엽육세포의 부분적 파괴로 인한 세포배열의 규칙성 상실 등이 야기되었다. 결국, 건답직파벼 및 이앙벼는 Bensulfuron에 대해 안전하였으나 담수직파벼는 심한 약해가 유발되었다. 본 연구에서 해부학적 반응차이는 생장반응의 차이와 반드시 일치하지 않게 나타났다.

• 한국인쇄학회지
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• 제22권2호
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• pp.151-162
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• 2004

MnSb layers were grown on GaAs(100), (111)A and (111)B substrates by hot wall epitaxy under various growth conditions. Growth condition dependence of structural properties of the layers was examined. The growth direction and structural properties of MnSb/GaAs(100) depend on Sb source and substrate temperatures. The smooth MnSb(10.1)/GaAs(100) interface was obtained under the appropriate growth condition. On the other hand, MnSb(00.1) layers were grown on GaAs(111) substrates. The quality of the layers on (111)B was superior to that on GaAs(111)A, but degraded as in increasing Sb source temperature during the growth. The $Mn_2Sb$ domain was generated in the layers grown under conditions of low Sb source temperature and high substrate temperature on GaAs(111) substrates.

• 한국자원식물학회지
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• 제1권1호
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• pp.88-92
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• 1988

The study was conducted to determine the optimal basal media and the concentration of plant growth regulator for germination of seeds and growth of plantlet from Dendrobium monile. The results obtained were summarized as follows. Germination was similar in light and dark condition, but the growth of plantlet after germination was better under dark than under light condition in several media. Germination was best in Hyponex and Kyoto solution medium among the 9 media tested. The number of roots/shoot was most in the Hyponex medium containing 0,1ppm NAA and 1.Oppm BA.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.1933-1938
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• 2004

Nucleate boiling experiments with constant wall temperature of heating surface were performed using R113 for almost saturated pool boiling conditions. A microscale heater array and Wheatstone bridge circuits were used to maintain a constant wall temperature condition and to measure the heat flow rate with high temporal and spatial resolutions. Bubble images during the bubble growth were taken as 5000 frames a sec using a high-speed CCD camera synchronized with the heat flow rate measurements. The geometry of the bubble during growth time could be obtained from the captured bubble images. The bubble growth behavior was analyzed using the new dimensionless parameters for each growth regions to permit comparisons with previous results at the same scale. We found that the new dimensionless parameters can describe the whole growth region as initial and later respectively. The comparisons showed good agreement in the initial and thermal growth regions. The required heat flow rate for the volume change of the observed bubble was estimated to be larger than the instantaneous heat flow rate measured at the wall. Heat, which is different from the instantaneous heat supplied through the heating wall, can be estimated as being transferred through the interface between bubble and liquid even with saturated pool conditions. This phenomenon under a saturated pool condition needs to be analyzed and the data from this study can supply the good experimental data with the precise boundary condition (constant wall temperature).