• 약학회지
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• 제39권4호
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• pp.433-437
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• 1995

Optically pure(-)-and (+)-$\alpha$-hydroxy-$\alpha$-(p-chlorobiphenyl)acetic acids were prepared. The racemate was synthesized through three steps. By condensation of p-cnorobiphenyl with diethyl ketomalonate in the presence of SnCl$_{4}$, diethyl $\alpha$-hydroxy-$\alpha$-(p-chlorobiphenyl)malonate (1) was formed and subsequently ($\pm$)-$\alpha$-hydroxy-$\alpha$-(p-chlorobiphenyl)acetic acid (3) was obtained through hydrolysis and decarboxylation. For the separation of the racemate the classical resolution method, derivatization of a racemate by reaction with an optically pure compound was employed. In this case the optically pure compound were [R]-(+)-$\alpha$-methylbenzylamine and [S]-(-)-$\alpha$-methylbenzylamine. Diastereomeric salts between acids and bases could be easily separated by crystallization in absolute ethanol.

• East Asian mathematical journal
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• 제31권1호
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• pp.103-107
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• 2015

We use some known contiguous function relations for $_2F_1$ to show how simply the following three recurrence relations for Jacobi polynomials $P_n^{({\alpha},{\beta)}(x)$: (i) $({\alpha}+{\beta}+n)P_n^{({\alpha},{\beta})}(x)=({\beta}+n)P_n^{({\alpha},{\beta}-1)}(x)+({\alpha}+n)P_n^{({\alpha}-1,{\beta})}(x);$ (ii) $2P_n^{({\alpha},{\beta})}(x)=(1+x)P_n^{({\alpha},{\beta}+1)}(x)+(1-x)P_n^{({\alpha}+1,{\beta})}(x);$ (iii) $P_{n-1}^{({\alpha},{\beta})}(x)=P_n^{({\alpha},{\beta}-1)}(x)+P_n^{({\alpha}-1,{\beta})}(x)$ can be established.

• East Asian mathematical journal
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• 제19권1호
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• pp.73-80
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• 2003

Let D be a bounded domain in $\mathbb{C}^n$ with $C^2$ boundary. In this paper, we prove the following inequality $${\parallel}u{\parallel}_{p_2,{\alpha}_2}{\lesssim}{\parallel}u{\parallel}_{p_1,{\alpha}_1}+{\parallel}\bar{\partial}u{\parallel}_{p_1,{\alpha}_1+p_1}/2$$, where $1{\leq}p_1{\leq}p_2<\infty,\;{\alpha}_j>0,(n+{\alpha}_1)/p_1=(n+{\alpha}_1)/p_1=(n+{\alpha}_2)/p_2$, and $1/p_2{\geq}1/p_1-1/2n$.

• 한국발생생물학회지:발생과생식
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• 제12권1호
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• pp.107-112
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• 2008

점망둑의 난모세포 성숙과정에서 생성되는 주요 성 스테로이드 호르몬, $C_{21}$-스테로이드를 분석하고자 전구물질 $^3H-17{\alpha}hydroxyprogesterone$ ($^3H-17{\alpha}OHP$)를 성숙기 난모세포(난경 $0.74{\sim}0.97\;mm$) 배양초기에 첨가하여 24시간 배양하였다. 스테로이드 대사물질 분석과 동정은 thin layer chromatography와 gaschromatography-mass spectrometry로 이루어졌다. $^3H-17{\alpha}20{\alpha}P$로부터 생성된 주요 성 스테로이드 대사물질은 $17{\alpha}$-hydroxy, $20{\alpha}$-dihydroprogesterone ($17{\alpha}20{\alpha}P$)와 $17{\alpha}$-hydroxy, $20{\beta}$-dihydroprogesterone ($17{\alpha}20{\beta}P$)로 확인되었다. 이들 대사물질은 난경 0.80 mm 이상에서 관찰되었으며, GVBD (germinal vesicle breakdown) 유도 효능 테스트에서 점망둑의 난모세포는 $17{\alpha}20{\beta}P$에 더 민감하게 반응하였다. 이러한 결과는 점망둑의 난소성숙 과정에 $17{\alpha}20{\alpha}P$와 $17{\alpha}20{\beta}P$이 모두 관여하나, MIS (maturation inducing steroid)로서의 가능성은 $17{\alpha}20{\beta}P$이 더 큰 것으로 관찰되었다.

• 약학회지
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• 제18권2호
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• pp.145-156
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• 1974

P, P'-Hexachiorobitolyl, p, p-hexachlorobitolylketone and p, p' hexachlorobitolylthiourea were synthesized by the radical chlorination method of Hass and McBeer. Among these comppounds, l wormicidal activity of p.p'-hexachlorobitolythiourea was much most potent against Clonorchis sinensis than Hetol in vitro. In the process of the p, p'-biolyl chlorination, ${\alpha, \alpha, \alpha}$-trichlorobitolyl was not detected, but small amount of ${\alpha, \alpha, \alpha}$-dichlorobitolyl was detected. This compound was immediately converted bitolyl compounds were analyzed, linear relationship was observed between retention indices and number of chlorine in two series of odd and even numbered chlorine compounds.

• 대한화학회지
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• 제17권4호
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• pp.269-274
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• 1973

${\alpha}$-Cyano-${\beta}$-Piperonylacrylic Acid의 가분해 속도상수를 자외선분광기를 사용하여 구하였으며 아울러 넓은 pH범위에 잘 맞는 반응속도식도 얻었다. 이 식에 의하면 넓은 pH범위에 잘 맞는 반응속도식도 얻었다. 이 식에 의하면 넓은 pH범위, 특히 종전에 잘 규명된 바 없는 산성용매 속에서의 반응 및 hydroxide ion의 촉매역활 등도 정략적으로 잘 설명할 수 있음을 알았다. 즉 pH4.0이하에서의 가수분해반응은 ${\alpha}$-Cyano-${\beta}$-Piperonylacrylic Acid에 물분자가 첨가되므로써 시작되며 pH $5.0{\sim}7.5$ 에서는 ${\alpha}$-Cyano-${\beta}$-Piperonylacrylic Acid와 ${\alpha}$-Cyano-${\beta}$${\alpha}$-Cyano-${\beta}$-piperonylacrylate anion에 물분자만이 첨가되며 pH 12.0 이상에서는 hydroxide ion만이 ${\alpha}$-Cyano-${\beta}$-piperonylacrylate anion에 첨가됨을 알았다.

• 대한화학회지
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• 제35권3호
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• pp.258-261
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• 1991

${\alpha}$,N-diphenylnitrone에 cysteine과 thiophenol을 반응시켜 4개의 thiazolidine과 다음의 5가지 새로운 화합물을 합성하였다. ${\alpha}$,thiophenoxy-benzylidene aniline : ${\alpha}$, thiophenoxy-p-hydroxybenzylidene aniline : ${\alpha}$,thiophenoxy-p-chlorobenzylidene aniline : ${\alpha}$,thiophenoxy-p-methoxybenzylidene aniline : ${\alpha}$,thiophenoxy-p-nitrobenzylidene aniline. 이 화합물들의 구조는 원소분석, UV-, IR 및 NMR- 스펙트럼에 의해 확인하였다.

• 한국식품과학회지
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• 제39권2호
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• pp.217-221
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• 2007

인삼 분말이 $B({\alpha})P$의 투여로 간 독성이 유발된 마우스에서의 항산화 효소, 글루타치온 및 과산화지질 함량 변화에 미치는 영향으로 살펴보았다. 먼저 인삼 분말의 투여시 $B({\alpha})P$ 투여로 인한 간 조직중의 SOD, catalase 그리고 GSH-Px의 활성은 유의적으로 증가되었다가, 인삼분말의 처리로 이들 활성이 유의적으로 감소하였다. 반면, GST 활성과 간 조직중의 글루타치온 함량은 $B({\alpha})P$ 단독 투여군에서는 감소되었다가 인삼 분말 투여시 유의적인 증가를 보였다. 그러나 cytochrome P-450 활성과 지질과산화물 함량은 $B({\alpha})P$ 투여시 증가되었다가 인삼 분말의 투여시 유의적으로 감소되었다. 이상의 결과로 인삼 분말은 $B({\alpha})P$에 의한 간 손상에 대한 보호효과를 가지는 것으로 사료된다.

• East Asian mathematical journal
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• 제17권2호
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• pp.275-286
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• 2001

In this paper, a skew polynomial ring $R[x;\alpha]$ of a ring R with a monomorphism $\alpha$ are investigated as follows: For a reduced ring R, assume that $\alpha(P){\subseteq}P$ for any minimal prime ideal P in R. Then (i) $R[x;\alpha]$ is a reduced ring, (ii) a ring R is Baer(resp. quasi-Baer, p.q.-Baer, a p.p.-ring) if and only if the skew polynomial ring $R[x;\alpha]$ is Baer(resp. quasi-Baer, p.q.-Baer, a p.p.-ring).

• Kyungpook Mathematical Journal
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• 제49권2호
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• pp.255-263
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• 2009

For an endomorphism ${\alpha}$ of R, in [1], a module $M_R$ is called ${\alpha}$-compatible if, for any $m{\in}M$ and $a{\in}R$, ma = 0 iff $m{\alpha}(a)$ = 0, which are a generalization of ${\alpha}$-reduced modules. We study on the relationship between the quasi-Baerness and p.q.-Baer property of a module MR and those of the polynomial extensions (including formal skew power series, skew Laurent polynomials and skew Laurent series). As a consequence we obtain a generalization of [2] and some results in [9]. In particular, we show: for an ${\alpha}$-compatible module $M_R$ (1) $M_R$ is p.q.-Baer module iff $M[x;{\alpha}]_{R[x;{\alpha}]}$ is p.q.-Baer module. (2) for an automorphism ${\alpha}$ of R, $M_R$ is p.q.-Baer module iff $M[x,x^{-1};{\alpha}]_{R[x,x^{-1};{\alpha}]}$ is p.q.-Baer module.