• Food Science and Biotechnology
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• 제17권1호
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• pp.80-84
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• 2008

The effect of gellan (GE), xanthan (XA), and $\lambda$-carrageenan (LC) on the viscosity, sedimentation, ellagic acid content, and turbidity of grape 'Campbell Early' juice (CEJ) was investigated. CEJ samples with 0.15% each of GE, XA, and LC were tested for the above variables after 0, 5, 10, and 20 days of storage. The samples containing GE (0.15%) showed the least amount of sediment formation, the lowest ellagic acid content and turbidity, and a rise in viscosity. Sedimentation in CEJ decreased with increased viscosity due to the addition of gums which also limited the ellagic acid content and turbidity. GE was the most effective additive for the stabilization of CEJ.

• 한국식품과학회지
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• 제46권5호
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• pp.575-580
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• 2014

겔화제의 종류에 따른 겔상식품의 특성을 알아보고자 대조군인 한천첨가 양갱과 다양한 겔화제를 혼합 사용한 양갱을 제조하고 그 특성을 비교하였다. 첨가되는 겔화제의 특성은 최종 제품의 수분손실량, 색, 조직감 등의 물리적 특성에 크게 영향을 미치는 것으로 나타났다. 덜 조밀하고 가장 불규칙적인 단면특성을 보이는 gellan 첨가 양갱은 수분 손실이 가장 크고, 가장 부드러우면서도 입에 들러붙는 부착성이 큰 특성을 보였다. 반면, LBG+carrageenan 겔의 혼합은 두 겔의 상호작용으로 단단한 겔을 만들기 때문에 이를 첨가한 양갱 역시 가장 단단한 경도를 보였다. 본 연구결과 고령자들은 너무 단단하지 않으면서도 응집성이 높고 탄력성이 있어 씹을 수 있는, 그러나 입에 들러붙는 부착성이 낮은 겔상 식품을 선호하는 것으로 나타났다. 두 종류의 겔을 혼합하여 적절한 농도로 겔을 제조하면 경도, 부착성, 및 응집성 등의 조직감 특성을 다양화 할 수 있으므로 적절한 겔화제의 선택, 농도조절 등으로 고령자의 저작능력에 맞는 다양한 물성을 갖는 식품제조가 가능할 것으로 생각된다.

• Journal of Microbiology and Biotechnology
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• 제10권5호
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• pp.663-669
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• 2000

The fur (ferric uptake regulation) expression vector pMON2064 was modified to produce a Fur-fusion expression vector. A kinker site, factor Xa cleavage site, and several restriction endonuclease sites were introduced to facilitate easy cloning and isolating of the fusion protein. The resulting fusion expression vector, pMONSTER, was then used to make fusion expression vector, pMONSTER, was then used to make fusion proteins with $\beta$-galactosidase and the protease of the human immunodeficiency virus type 1 (HIV-1 PR). Strain SW4020 harboring the Fur $\beta$-galactosidase fusion vector produced blue colonies on a 5-bromo-4-chloro-3-indolyl-$\beta$-D-galactoside plate and the resulting 133 kDa fusion protein reacted with an anti-Fur antibody. The strain harboring the Fur-HIV-1 PR fusion vector produced a 29 kDa fusion protein, which also reacted with an anti-Fur antibody. The Fur-HIV-1 PR fusion protein was purified by a single column application that was designed to isolate the Fur protein. The purified Fur-HIV-1 PR fusion protein digested with factor Xa cleaved a recombinant Gag protein to release smaller fragments, including a p24 capsid protein. The Fur-HIV-1 PR fusion protein itself did not exhibit any proteolytic activity.

• Korean Journal of Mathematics
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• 제21권3호
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• pp.345-350
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• 2013

Some results on the sensitivity of the solution of the generalized Lyapunov equation $$A^{n-1}X+A^{n-2}XA^*+{\cdots}+X(A^*)^{n-1}=B$$ are shown follow easily from well-known theorems in functional analysis.

• Kyungpook Mathematical Journal
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• 제55권1호
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• pp.63-71
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• 2015

Let H be a separable infinite dimensional complex Hilbert space, and let $\mathcal{L}(H)$ denote the algebra of all bounded linear operators on H into itself. Let $A,B{\in}\mathcal{L}(H)$ we define the generalized derivation ${\delta}_{A,B}:\mathcal{L}(H){\mapsto}\mathcal{L}(H)$ by ${\delta}_{A,B}(X)=AX-XB$, we note ${\delta}_{A,A}={\delta}_A$. If the inequality ${\parallel}T-(AX-XA){\parallel}{\geq}{\parallel}T{\parallel}$ holds for all $X{\in}\mathcal{L}(H)$ and for all $T{\in}ker{\delta}_A$, then we say that the range of ${\delta}_A$ is orthogonal to the kernel of ${\delta}_A$ in the sense of Birkhoff. The operator $A{\in}\mathcal{L}(H)$ is said to be finite [22] if ${\parallel}I-(AX-XA){\parallel}{\geq}1(*)$ for all $X{\in}\mathcal{L}(H)$, where I is the identity operator. The well-known inequality (*), due to J. P. Williams [22] is the starting point of the topic of commutator approximation (a topic which has its roots in quantum theory [23]). In [16], the author showed that a paranormal operator is finite. In this paper we present some new classes of finite operators containing the class of paranormal operators and we prove that the range of a generalized derivation is orthogonal to its kernel for a large class of operators containing the class of normal operators.

• 동의신경정신과학회지
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• 제10권2호
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• pp.29-45
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• 1999

As the average life span has been lengthened and the rate of senile population has been raised, chronic degenerative diseases incident to aging have been increased rapidly and become a social problem. With this social background, recently, oxygen radicals(OR) have toxic effects on Central Nervous System and Peripheral Nervous System and cause neuropathy such as Parkinson's Disease, Alzheimer Disease. The purpose of this study is to examine the toxic effects caused by Xanthine Oxidase(XO) and the effects of herbal extracts such as Jokihaeatang(JHT) on the treatment of the toxic effects. For this purpose, experiments with the cultured cell from the cerebrums of new born mice were done. The results of these experiments were as follows. 1. X0, an oxygen radical, decreased the survival rate of the cultured cells on NR assay, MTT assay and amount of neurofilaments and increased the amount of lipid peroxidation. 2. JHT have efficacy of increasing the amount of neurofilaments.

• Kyungpook Mathematical Journal
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• 제49권4호
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• pp.743-750
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• 2009

A class of Hermitian operators B admitting a positive semidefinite solution of the linear operator equation ${\sum}^n_{j=1}A^{n-j}XA^{j-1}=B$ for a fixed positive definite operator A is given via the Furuta inequality.

• 대한디지털의료영상학회논문지
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• 제16권1호
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• pp.35-42
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• 2014

Heart related special images are classified as Cardiac US, XA, CT, MRI. Several Problem is caused by image compression, control and medical support point, so most big hospitals have created a Cadiac PACS differentially in past years. For this reason, create a conflict in inner colleague and patient, protector that result from 2 data processing server operating independently in 1 medical center area. For this reason, we sugges an alternative model of best medical control process together with understand the current situation on medical facility.

• East Asian mathematical journal
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• 제22권1호
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• pp.61-69
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• 2006

A near-ring N is reduced if, for $a{\in}N,\;a^2=0$ implies a=0, and N is left strongly regular if for all $a{\in}N$ there exists $x{\in}N$ such that $a=xa^2$. Mason introduced this notion and characterized left strongly regular zero-symmetric unital near-rings. Several authors ([2], [5], [7]) studied these properties in near-rings. Reddy and Murty extended some results in Mason to the non-zero symmetric case. In this paper, we will define a concept of strong reducedness and investigate a relation between strongly reduced near-rings and left strongly regular near-rings.

• 한국결정성장학회지
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• 제1권1호
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• pp.92-99
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• 1991

$Si(OC_2H_5)_4$ 로부터 $SiO_24$ 미립자를 얻는 반응은 가수분해반응과 종합반응의 두 단계로 이루어지며 중합반응은 $Si(OC_2H_5)_4$의 농도에 대하여 1차 반응이었다. 중합반응의 반응속도상수는 물의 농도와 촉매의 농도가 증가할수록 그리고 반응온도가 높아질수록 커지는 경향을 나타내고 있다. 생성된 실리카의 직경은 $0.06-0.27\mu\textrm{m}$이었으며 직경은 $Si(OC2H5)4$의 초기농도가 작아질수록 온도가 시간에 따라 입자가 성장해가는 속도는 전화율의 함수로 d=a.ln(Xa)+b 의 형태로 나타낼 수 있으며 최종 실리카의 직경은 사수 b값에 접근하였다.