• 한국작물학회지
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• 제44권4호
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• pp.321-329
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• 1999

The effect of water deficits on soybean [Glycine max (L.) Merr.] could appear on seed quality through changes of morphological plant characteristics. Two Korean genotypes, Hwangkeum (determinate growth habit) and Muhan (indeterminate growth habit), were used to examine the influences of treatment stage and method of water deficit during reproductive growth period on yield and seed quality of soybean. Water deficit at R5 or R6 stages was as damaging to seed quality as double water-deficit treatments at R2+R5 or R2+R6. However, seed from double water-deficit treatment tended to have lower oxidation-reduction potential compare to the corresponding single water-deficit treatment. In comparison with Muhan, Hwangkeum had significantly greater oxidation-reduction potential value. Seed yield per plant in both genotypes depended greatly on seed yield of branches. However, the proportion of number of branch seed to total seed umber in Hwangkeum was increased as the water deficit was applied during later reproductive stage, whereas, in Muhan the proportion was lower. Water-deficit treatments including the single and double water-deficit treatments and non-stressed treatment were able to be classified into five groups for Hwangkeum and four groups for Muhan based on the influences on yield components, number of pod, number of seed, and single seed weight, using principal component analysis. In both genotypes, R2+R5 water-deficit treatment decreased number of pod and seed, but increased single seed weight. On the contrary, R6 or R2+R6 stress increased the pod and seed number, but decreased single seed weight.

• 한국초전도ㆍ저온공학회논문지
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• 제19권2호
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• pp.9-13
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• 2017

This study presents a simple method to control the seed orientation which leads to the various growth characteristics of a single grain REBCO (RE: rare-earth elements) bulk superconductors. Seed orientation was varied systematically from c-axis to a-axis with every 30 degree rotation around b-axis. Orientations of a REBCO single grain was successfully controlled by placing the seed with various angles on the prismatic indent prepared on the surface of REBCO powder compacts. Growth pattern was changed from cubic to rectangular when the seed orientation normal to compact surface was varied from c-axis to a-axis. Macroscopic shape change has been explained by the variation of the wetting angle of un-reacted melt depending on the interface energy between $YBa_2Cu_3O_{7-y}$ (Y123) grain and melt. Higher magnetic levitation force was obtained for the specimen prepared using tilted seed with an angle of 30 degree rotation around b-axis.

• 한국초전도ㆍ저온공학회논문지
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• 제24권3호
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• pp.35-40
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• 2022

To fabricate large grain YBCO bulk superconductors by melt process, Sm123 single crystal with a high melting point are mostly used as seeds. However, it also uses Y123 film deposited on MgO single crystal substrate. This study investigated the growth behavior of the Y123 grain during a melt process when single grain YBCO bulk was used as a seed. Single grain Y123 bulk was grown when the seed size was small. When the seed size was relatively large, multiple grains were grown but the grains were still large. Y123 seed crystal was completely decomposed during high temperature anneal at 1040℃ and new Y123 crystals were nucleated during a slow cooling stage below a peritectic temperature. Thereafter, newly formed Y123 crystals from the seed area are thought to grow into the Y1.8 powder compact. The crystallographic orientations of newly nucleated Y123 grains are independent of the crystallographic orientation of Y123 seed. It is thought that the crystallographic orientation of newly nucleated Y123 crystal can be controlled by using Y211-free Y123 single crystal as a seed of homo-seeding melt growth.

• 식물분류학회지
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• 제41권2호
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• pp.103-107
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• 2011

가지과 Withania somnifera (L.) Dunal의 종자 해부학적 특징을 알기 위하여 광학현미경과 주사전자 현미경을 사용하여 관찰하였다. 종자의 색깔은 노랑색이고, 종자의 형태는 신장형이며, 크기가 2−3 mm 정도이다. 종자는 종의를 가지고 있지 않았으며, 배유가 잘 발달한 유배유종자였다. 종피형태는 외종피외층형으로 나타났다. 종피는 외종피만으로 구성되는 단주피성 이었으며, 한 층의 외종피외층, 여러 층의 외종피중층, 그리고 한 층의 외종피내층으로 구성되었다. 그러나 종자가 완전히 성숙했을 때는 외종피중층이 모두 압착되었으며, 외종피외층은 특징적으로 파상형의 후벽세포로 발달하였다. 종피의 표면은 망상구조를 가지며, 수층 벽구조는 파상형으로 발달하였고, 표면에 여러 개의 구멍이 발달하는 특징이 관찰되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 추계학술대회 논문집 Vol.19
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• pp.232-232
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• 2006

SiC single crystal Ingots were prepared onto different seed material using sublimation PVT techniques and then their crystal quality was systematically compared. In this study, the conventional SiC seed material and the new SiC seed material with an inserted SiC epitaxial layer on a seed surface were used as a seed for SiC bulk growth. The inserted epitaxial layer was grown by a sublimation epitaxy method called the CST with a low growth rate of $2{\mu}m/h$ N-type 2"-SIC single crystals exhibiting the polytype of 6H-SiC were successfully fabricated and carrier concentration levels of below $10^{17}/cm^3$ were determined from the absorption spectrum and Hall measurements. The slightly higher growth rate and carrier concentration were obtained in SiC single crystal Ingot grown on new SiC Seed materials with the inserted epitaxial layer on the seed surface, maintaining the high quality.

• 한국초전도ㆍ저온공학회논문지
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• 제1권1호
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• pp.1-6
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• 1999

The microstructures of top seed mult processde $\textrm{YBa}_2\textrm{Cu}_3\textrm{O}_7$.$\delta$ single crystal were studied. Although shape of the seed was not faceted. the growth shape of Y123 single crystal was faceted. It was observed that Y211 phases were trapped in specific spaces of the faceted region. From the microstructural investigation. it was suggested that the segregation of Y211 is due to the difference of growth rates in crystal direction. When a single crystal was grown by the single seed with stepped multi surfaces. a microstrue was grown from multi-seed. The microstructure show the possibility of multi-seed growth. Corn kernel like structure without Y211 phase was observed and seemed to be formed by the diffusion reaction between Y211 phase in crystal and liquid wetted on the crystal. the diagonal line on Y123 crystal was observed that it was formed by the corn kernel like structure.

• 한국초전도ㆍ저온공학회논문지
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• 제19권3호
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• pp.33-39
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• 2017

This study presents that the orientation and the geometry of seed affect on the growth behavior of melt processed single grain REBCO bulk superconductor and its magnetic properties. The effects of seed geometry have been investigated for thin $30mm{\times}30mm$ rectangular powder compacts. Single grain REBCO bulk superconductors have been grown successfully by a top seed melt growth method for 8-mm thick vertical thin REBCO slab. Asymmetric structures have been developed at the front surface and at the rear surface of the specimen. Higher magnetic properties have been obtained for the specimen that c-axis is normal to the specimen surface. The relationships between microstructure, grain growth and magnetic properties have been discussed.

• 한국작물학회지
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• 제53권spc호
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• pp.78-83
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• 2008

콩에 함유된 성분 중 가장 많은 양으로 존재하며, 인축의 주요 단백질 공급원으로 이용되고 있는 콩 단백질의 함량을 1립 비파괴 근적외 분광분석법을 이용하여 동일품종의 개체 내에서 콩이 달린 착협 위치에 따라, 또 콩에서 단백질 함량을 분석하기 위해 개체 내에서 분석시료를 취할 때 개체를 대표할 수 있는 최소 양을 실험적으로 검토한 결과를 요약하면 다음과 같다. 1. 선녹콩 개체 내 단백질 함량은 정규분포를 보였으며, 개체 간에 단백질 함량의 차이가 인정되었다. 2. 콩의 착협 위치에 따른 단백질 함량은 지표면에 가까울수록 단백질 함량이 높았고, 콩 식물체의 윗부분으로 갈수록 단백질 함량이 낮아지는 경향을 나타내었다. 3. 콩에 함유된 단백질의 함량을 정량적으로 분석하기 위해 필요한 최소 시료량을 추정한 결과 최소 10립 이상 혹은 개체 내 총 종자량의 20% 이상을 취하면 개체를 대표하는 단백질 함량을 얻을 수 있는 것으로 조사되었다.

• 한국작물학회지
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• 제32권3호
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• pp.330-335
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• 1987

인삼종자의 열매송이를 원이라 가정하고 그 원의 반지름을 3등분한 원을 각각 작도하여 1차원의 부분을 중앙부, 2차원의 부분을 중간부, 3차원의 부분을 외부라 구분하고 각 부위에 착생한 종자의 크기 및 ginsenoside, 유리당, 지방산의 차이를 조사하였다. 1. 100입의 종자중과 배유중은 열매송이의 외부나 중간부에 착생한 종자에 비해 중앙부에 착생한 종자에서 현저히 작았다. 2. 1입과의 종자가 2입과의 종자에 비해 소립이었고, 1입과의 착생비율은 열매송이의 외부나 중간부에 비해 중앙부에서 증가되었다. 3. 종자내의 주요 ginsenoside 는 Re, Rb$_1$, Rb$_2$,Rd 였고, 종자의 착생위치별는 Rb$_2$ 와 총사포닌 함량은 중앙부쪽에 착생한 종자일수록 감소했으나 Rd 함량은 오히려 증가되었다. 4. 종자내의 주요유리당은 sucrose, glucose 였고, 종자의 착생위치별로 보면 sucrose 는 열매송이의 중앙부쪽에 착생한 종자일수록 그 함량이 점점 감소되었다. 5. 종자내의 주요지방산은 oleic 산과 linoleic 산이었고, palmitic 산과 linolenic산의 함량은 종자의 착생위치에 따라 차이를 보였다.

• 한국세라믹학회지
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• 제35권8호
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• pp.878-884
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• 1998

Synthesis of high purity mullite from korean resourceful kaolin and water-soluble aluminium salts was in-vestigated by addition of mullite seed. Single phase of mullite was formed at 1350$^{\circ}C$ however its mullite con-tent was 31-33% Maximum content of mullite synthesized from kaoin aluminium nitrate and 8wt% mul-lite seed was 98% at 1600$^{\circ}C$ for 4 hours.