• Journal of applied mathematics & informatics
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• 제33권1_2호
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• pp.101-110
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• 2015

A Total Mean Cordial labeling of a graph G = (V, E) is a function $f:V(G){\rightarrow}\{0,1,2\}$ such that $f(xy)={\Large\lceil}\frac{f(x)+f(y)}{2}{\Large\rceil}$ where $x,y{\in}V(G)$, $xy{\in}E(G)$, and the total number of 0, 1 and 2 are balanced. That is ${\mid}ev_f(i)-ev_f(j){\mid}{\leq}1$, $i,j{\in}\{0,1,2\}$ where $ev_f(x)$ denotes the total number of vertices and edges labeled with x (x = 0, 1, 2). If there is a total mean cordial labeling on a graph G, then we will call G is Total Mean Cordial. Here, We investigate the Total Mean Cordial labeling behaviour of prism, gear, helms.

• 한국수정란이식학회:학술대회논문집
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• 한국수정란이식학회 2006년도 The 6th Intermational Symposium on Developmental Biotechnology
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• pp.34-35
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• 2006

• 한국재료학회:학술대회논문집
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• 한국재료학회 1998년도 IUMRS-ICEM ABSTRACT BOOK
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• pp.67.2-67
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• 1998

• 대한약학회:학술대회논문집
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• 대한약학회 2000년도 NEW STRATEGY FOR DRUG DEVELOPMENT IN POST-GENOMIC ERA(대한약학회)
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• pp.234.2-234.2
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• 2000

• 한국동물번식학회:학술대회논문집
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• 한국동물번식학회 2001년도 춘계학술발표대회
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• pp.22-22
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• 2001

To produce reconstituted rabbit embryos with fetal fibroblasts, the present study was evaluated the efficiencies of the different fusion and activation conditions as assessments of subsequent development and chromosome in the embryos. New Zealand White rabbits were used throughout the study. Fetal fibroblasts collected from 22-d of fetuses were cultured in DMEM ＋ 10% FBS in 5% $CO_2$ in air. The culture was maintained for 10 passages. In every passage half of cell suspension were kept In frozen. From rabbits treated with FSH in 30% PVP solution and hCG, oocytes were surgically collected from oviducts at 14 h post-hCG injection and stripped off their cumulus cells by re-pipetting in a 300 IU hyaluronidase solution. Oocytes with an extruded first polar body and dense cytoplasm were enucleated by micromanipulation in Ham's F-10 medium＋7.5 g/$m\ell$ cytochalasin B. Euncleation was confirmed under a fluorescence microscope after staining with 5 g/$m\ell$ bisbenzimide for 2 min. Each enucleated oocyte was injected with a fetal fibroblast into a perivitelline space. Reconstructed eggs were compared fusion rates either at 2.0 ㎸/cm or 1.6 ㎸/cm(60 sec, double pulses). After fusion, all eggs were activated with the combination of 5 M ionomycin (5 min) and 10 g/$m\ell$ cycloheximide (CHX, 3h), and cultured in CRlaa medium and transferred into TCM199＋10% FBS on day 3. Although there was not significantly differ in fusion rate between treatments (60%, 2.0 ㎸/cm vs. 79.4%, 1.6 ㎸/cm), none of them in the eggs fused with 2.0 ㎸/cm developed to blastocyst. In comparison of development and chromosome status between different activation treatments (Group 1; 5 M ionomycin/10 g/$m\ell$ CHX, Group 2; 5 M ionomycin/5 g/$m\ell$ CHX ＋ 2 mM DMAP after fusion with 1.6 ㎸/cm), there were not differ in cleavage and development rates (67.3% and 28.9% in Group 1; 67% and 33% in Group 2). All out of 8 embryos evaluated in Group 1 appeared a normal diploid chromosome sets and mean number of cells (Mean SEM) on day 4.5 of culture was 141.5 23.15 (n=8). It can be concluded that the use of cycloheximide has not happened in chromosome abnormalities, and fetal fibroblasts can be used for cloning in rabbit.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2008년도 12th Asian Congress of Fluid Mechanics
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• pp.68.2-68.2
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• 2008

• 농업과학연구
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• 제11권1호
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• pp.133-145
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• 1984

본(本) 연구(硏究)는 기포제(起泡劑)가 모르터의 특성(特性)에 미치는 영향(影響)을 연구(硏究)하기 위(爲)하여 기포(氣泡) 모르터의 물-시멘트 비(比)시험(試驗)과 밀도시험(密度試驗)을 배합별(配合別), 기포제별(起泡劑別)로 실시(實施)하였으며, 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 물-시멘트비(比)는 배합비(配合比) 1 : 4, G, U 및 J 기포제(起泡劑) 첨가량(添加量) 0.5%에서 90.0%, 88.3% 및 70.0%로 가장 크게 나타났으나, 보통(普通)모르터의 물-시멘트비(比) 91.6%보다는 작게 나타났다. 2. 물-시멘트비(比)의 감소율(減少率)은 보통(普通)모르터에 비(比)하여 G 및 U 기포(氣包)모르터에서 배합비(配合比) 1 : 3, 기포제(起包劑) 첨가량(添加量) 3.0%일 때 22.0%와 24.1%로 가장 크게 나타났고, 이 보다 부배합(富配合)이나 빈배합(貧配合)일수록 작게 나타났다. 또한 J 기포제(起包劑)에서는 배합비(配合比) 1 : 4, 기포제(起包劑) 첨가량(添加量) 3.0%에서 물-시멘트 비감소율(比減少率)이 53.1%로 가장 크게 나타났고 이보다 부배합(富配合) 일수록 작게 나타났다. 3. 밀도(密度)는 배합비(配合比) 1 : 1, G, U 및 J 기포제(起包劑) 첨가량(添加量) 0.5%에서 $1.981g/cm^3$, $1.863g/cm^3$ 및 $1.149g/cm^3$로 가장 크게 나타났으나, 보통(普通)모르터의 밀도(密度) $2.048g/cm^3$보다는 작게 나타났다. 4. 밀도(密度)의 감소율(減少率)은 보통(普通)모르터에 비(比)하여 G, U 및 J 기포(氣泡)모르터에서 배합비(配合比) 1 : 2, 기포제(起包劑) 첨가량(添加量) 3.0%일 때 20.7%, 23.7% 및 56.5%로 가장 크게 나타났으나, 이보다 부배합(富配合)이거나 빈배합(貧配合)일수록 밀도(密度)의 감소율(減少率)은 작게 나타났다. 5. 물-시멘트비(比)와 밀도(密度)는 기포제(起泡劑)의 첨가량(添加量)이 증가(增加)할수록 감소(減少)되었으며, 또한 배합비(配合比)와 기포제(起包劑) 첨가량(添加量)에 따라 물-시멘트비(比)와 밀도(密度)를 추정(推定)할 수 있는 다중회귀방정식(多重回歸方程式)도 유도(誘導)되었다.

• Bulletin of the Korean Chemical Society
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• 제33권7호
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• pp.2352-2358
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• 2012

A high-nitrogen energetic salt, 1-amino-1-hydrazino-2,2-dinitroethylene guanidine salt [G(AHDNE)], was synthesized by reacting of 1-amino-1-hydrazino-2,2-dinitroethylene (AHDNE) and guanidine hydrochloride in sodium hydroxide aqueous solution. The theoretical investigation on G(AHDNE) was carried out by B3LYP/$6-311+G^*$ method. The thermal behaviors of G(AHDNE) were studied with DSC and TG-DTG methods, and the result presents an intense exothermic decomposition process. The enthalpy, apparent activation energy and pre-exponential constant of the process are $-1060J\;g^{-1}$, $148.7kJ\;mol^{-1}$ and $10^{15.90}s^{-1}$, respectively. The critical temperature of thermal explosion of G(AHDNE) is $152.63^{\circ}C$. The specific heat capacity of G(AHDNE) was studied with micro-DSC method and theoretical calculation method, and the molar heat capacity is $314.69J\;mol^{-1}K^{-1}$ at 298.15 K. Adiabatic time-to-explosion of G(AHDNE) was calculated to be a certain value between 60-72 s. The detonation velocity and detonation pressure were also estimated. G(AHDNE) presents good performances.

• 한국식품영양학회지
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• 제32권6호
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• pp.620-629
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• 2019

To examine the possibility of ear mushroom (EM) as a source of natural vitamin D, the UVB (ultraviolet B) was treated according to sample drying status, drying methods before UVB treatment and harvest time. And then, vitamin D₂ and ergosterol contents were investigated. According to the sample drying status, the vitamin D₂ contents of fresh and freeze-dried EM (whole) increased to 4,634.4~4,780.9 ㎍/100 g D.W. (dry weight) under UVB dose 52.5~70.0 kJ/㎡ and above 18,693.1 ㎍/100 g D.W. under above 105 kJ/㎡, respectively. By drying methods before UVB treatment, vitamin D₂ contents of EM powder (below 500 ㎛) that dried in the vinyl house and freeze-dryer increased to 4,886.2~5,132.9 ㎍/100 g D.W. under above 105 kJ/㎡ and 17,103.7 ㎍/100 g D.W. under 70 kJ/㎡, respectively. Ergosterol content decreased with increasing UVB dose in all experiments. According to the harvest time, vitamin D₂ content under UVB dose 210 kJ/㎡ showed marked difference and in order of June, July, August, October and April. As for the results, the optimum harvest time, drying method before UVB treatment, sample size, UVB dose for the EM contained high vitamin D₂ content were June, freeze-drying, whole, and 105 kJ/㎡, respectively.

• 대한수학회보
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• 제32권1호
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• pp.25-34
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• 1995

S. Tachibana [10] has defined a confornal Killing tensor in a n-dimensional Riemannian manifold M by a skew symmetric tensor $u_[ji}$ satisfying the equation $$ \nabla_k u_{ji} + \nabla_j u_{ki} = 2\rho_i g_{kj} - \rho_j g_{ki} - \rho_k g_{ji}, $$ where $g_{ji}$ is the metric tensor of M, $\nabla$ denotes the covariant derivative with respect to $g_{ji}$ and $\rho_i$ is a associated covector field of $u_{ji}$. In here, a covector field means a 1-form.