• 생약학회지
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• 제12권1호
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• pp.12-14
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• 1981

${\beta}-Sitosteryl-3-O-{\beta}-D-glucopyranoside$ was isolated from the seeds of Plantago asiatica (Plantaginaceae). The assignments of $^{13}C$ NMR spectra of ${\beta}-sitosterol$ and ${\beta}-sitosteryl-3-O-{\beta}-D-glucopyranoside$ were made by comparing with $^{13}C$ NMR spectra of cholesterol and $cholesteryl-3-O-{\beta}-D-glucopyranoside$. Our data indicate that the revision of previous $^{13}C$ NMR spectral assignment is needed.

• 충청수학회지
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• 제22권4호
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• pp.699-716
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• 2009

We deal with a Finsler space $F^n$ with an approximate infinite series $({\alpha},\;{\beta})$-metric $L({\alpha},\;{\beta})$ = ${\beta}{\sum}_{k=0}^{r}(\frac{\alpha}{\beta})^k$ where ${\alpha}<{\beta}$. We introduced a Finsler space $F^n$ with an infinite series $({\alpha},{\beta})$-metric $L({\alpha},\;{\beta})=\frac{\beta^2}{\beta-\alpha}$ and investigated various geometrical properties at [6]. The purpose of the present paper is devoted to finding the condition for a Finsler space $F^n$ with an approximate infinite series $({\alpha},\;{\beta})$-metric above to be a Douglas space.

• 대한안전경영과학회지
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• 제1권1호
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• pp.231-239
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• 1999

CAPM explains the rate of return for the risk asset by $\beta$, systematic risk. There are some assumption in CAPM. But CAPM can not explain the movement of stock price sufficiently due to limitation of the assumptions. Therefore many scholars study which variables with the exception of $\beta$ effect on the rate of return of risk asset for supplementing this limitation by using PER, size of firm etc.. But it will be natural that PER, size of firm etc. to be determinant factors of $\beta$ also effect on the abnormal rate of return, because PER, size of firm etc. used in their studies already effect on determination of $\beta$, . That is, the determinant factors of $\beta$ effect on determination of abnormal rate of return according as $\beta$, effects on abnormal rate of return. Therefore, this study tests empirically how the determinant factors of $\beta$, effect on determination of$\beta$, ,and how $\beta$ and the determinant factor of $\beta$ effect on the abnormal rate of return in CAPM.

• 약학회지
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• 제39권2호
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• pp.141-147
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• 1995

Four steroids have been isolated from the subterranean parts of Smilax nipponica Miquel (Liliaceae). The structures of these compounds were characterized on the basis of chemical and speectral data. They were $\beta$-sitosterol, $\beta$-sitosterol-3-O-$\beta$-D-glucopyranoside, neotigogenin-3-O-$\beta$-D-glucopyranoside and a new steroidal saponin designated as smilanippin A which was elucidated as neotigogenin-3-O-$\beta$-D-fucopyranosyl(1$\rightarrow$6)-$\beta$-D-glucopyranos ide.

• 약학회지
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• 제43권1호
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• pp.5-10
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• 1999

As one of the serial studies on the specific and indigenous plants of Mt. Chiri the constituents of aerial part from filipendula formosa (Rosaceae) were investigated. From of the MeOH extract, five flavonol glycosides, kaempferol-3-O-$\beta$-D-galactopyranoside, querecetin-3-O-$\beta$-D-galactopyranoside, quercetin-3-O-$\alpha$-Lrhamopyranosyl (1 6)-$\beta$-D-galactopyranoside, kaempferol-3-O-$\alpha$-L-rhamnopyranosyl (1 6)-$\beta$-D-galactopyranoside and quercetin-7-O-$\beta$-D-glucopyranosy-3-O-$\beta$-D-galactopyranoside were isolated by column chromatographic separation using Amberlite XAD-2 and Sephadex LH-20, and identified physicochemical evidences (IR, FAB-Mass, $^1H,{\;}^{13}C-NMR$).

• 약학회지
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• 제44권4호
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• pp.334-339
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• 2000

The present study was carried out to evaluate biologically active components of the rhizomes of Sparganium stoloniferum and to supply the preliminary data for the chemotaxonomy and the medicinal application. Extraction and systematic fractionation of the rhizomes by column chromatography led to the isolation of six compounds from ethylacetate and n-butanol soluble fractions. Elucidation of the chemical structures of these compounds by physicochemical and apectral analysis demonstrated that compound I,II ,III,IV,V and Ⅵ were $\beta$-sitosterol, $\beta$-sitosterol-3-$\beta$-D-glucuronopyranoside, 3- (4-hydroxyphenyl)-2-propenoic acid, sorbose, 1-O-$\beta$-D-glucopyranosyl-(2S, 3R, 4E, 8Z)-2-[(2(R)-hydroxyeicosanoyl)amido]-4,8-octadecadiene-1,3-diol, and $\beta$-sitosterol-3-O-$\beta$-D-glucopyranoside, respectively.

• Natural Product Sciences
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• 제4권3호
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• pp.143-147
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• 1998

Examination of the chemical constituents of the dried leaves of Isodon eriocalyx (Dunn.) Hara led to the isolation of four new diterpenoids, named maoecrystal Q-T (1-4). Their structures were elucidated as $16(R)-methoxymethyl-6{\beta},\;7{\beta}-dihydroxy-7{\alpha},20-epoxy-ent-kaur-2,3-ethenylene-1$, 15-dione(1), $1{\beta},18-diacetoxy-6{\beta},7{\beta}-dihydroxy-7{\alpha},20-epoxy-ent-kaur-16-en-15-one\;(2),\;6{\beta},\;7{\beta}-dihydroxy-15{\beta}-acetoxy-7{\alpha},20-epoxy-ent-kaur-16-en-1-one$ (3) and $7{\beta}-hydroxy-6{\beta},15{\beta}-diacetoxy-1{\alpha},11{\beta}-acetonide-7{\alpha},20-epoxy-ent-kaur-16-ene$ (4), respectively, on the basis of spectroscopic methods. Meanwhile, five known diterpeonids eriocalyxin B (5), maoecrystal B-D (6-8) and trichokaurin (9) were also obtained.

• 대한수학회지
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• 제49권4호
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• pp.867-879
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• 2012

For ${\beta}$ > 1, let $T_{\beta}$ : [0, 1] ${\rightarrow}$ [0, 1) be the ${\beta}$-transformation. We consider an invariant $T_{\beta}$-orbit closure contained in a closed interval with diameter 1/${\beta}$, then define a function ${\Xi}({\alpha},{\beta})$ by the supremum such $T_{\beta}$-orbit with frequency ${\alpha}$ in base ${\beta}$, i.e., the maximum value in $T_{\beta}$-orbit closure. This paper effectively determines the maximal domain of ${\Xi}$, and explicitly specifies all possible minimal intervals containing $T_{\beta}$-orbits.

• 한국미생물·생명공학회지
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• 제16권5호
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• pp.398-401
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• 1988

$\beta$-lactamase을 저해하는 물질을 생성하는 방선균의 일균주를 토양에서 분리하였다. 분리된 균으로부터 $\beta$-lactamase 저해물질을 생산하는 조건을 검토하였고, 아울러 배양액에서부터 동 물질을 분리정제하여 그 특성의 일부를 조사하였다. 그 결과 이 물질은 $\beta$-lactam ring을 가지고 있지 않았으며, $\beta$-lactam 항생물질에 대한 내성을 나타내는 E. coli 내성균주에 강한 항생력을 나타냄을 알았다.

• 한국식품영양과학회지
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• 제23권5호
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• pp.743-749
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• 1994

{\beta}-carotene$은 비타민 A 활성형인 retinol로 전환되어 그 기능을 수행하는 영양소로 알려져있지만 {\beta}-carotene$ 자체로서의 생리적, 영양학적 중요성이 부각되고 있다. 본 연구에서는 {\beta}-carotene$을 수준별로 공급하여 체내의 지질대사와 항산화 효소의 활성에 미치는 영향을 살펴보고자 계획되었으며 얻어진 결과는 다음과 같다. 간 미토콘드리아에서의 과산화지지르이 함량은 제한군과 과잉 공급군이 다른 처리군들에비해서 상대적인 증가를 보였고 BC 2군에서 가장 낮은 값을 나태내었다. SOD의 활성은 {\beta}-carotene$ 제한군이 공급군에 비해서 유의적으로 증가하여 SOD 활성에 대한 {\beta}-carotene$의 조절효과를 보여주었고 catalase와 GSH-Px의 활성에 대한 {\beta}-carotene$의 조절효과를 보여주었고 catalase와 GSH-Px의 활성은 과잉 공급군의 경우 가장 낮은 값을 보여주었다. {\beta}-carotene$ 공급에 따른 지질 함량의 변화는 간의 경우에 총지질 함량은 {\beta}-carotene$ 공급에 따라 감소하였고 중성지질은 전 군에서 유의적인 차이가 보이지 않았으며 인지질은 BC 2군과 BC 3군에서 유의적으로 낮은 값을 보였다. 콜레스테롤 함량은 BC 1군에서 가장 낮은 값을 보였다. 혈장에서는 {\beta}-carotene$ 공급이 증가함에 따라 중성지질의 함 은 증가하는 경향이었고 HDL-콜레스테롤은 BC 4군에서 가장 낮은 값을 나타내었다. HDL-콜레스테롤 함량비는 {\beta}-carotene$ 공급에 따라 증가되었으나 과잉공급군에서 제한군과 같은 수준으로 감소되었다. 이상의 결과에서와 같이 12,000mg의 {\beta}-carotene$을 급여한 군에서는 지질대사 관련효소 활성도와 체내 지질함량이 적정량을 급여한 군에 비해 크게 변화하였으나 10~1,200mg을 급여한 실험군들 사이에서는 큰 차이를 나타내지 않아 {\beta}-carotene$의 정량적 평가를 위한 지속적인 연구가 필요하다고 본다.하다고 본다.