21가지 장미꽃 품종의 페놀성 화합물 함량 및 항산화 활성

조연재(Yeon Jae Jo),서정현(Jeong Hyun Seo),홍채영(Chae Young Hong),김성태(Seung Tae Kim),최은경(Ehn-Kyoung Choi),김윤배(Yun-Bae Kim),이준수(Junsoo Lee),정헌상(Heon Sang Jeong) 한국식품영양과학회 2021 한국식품영양과학회지 Vol.50 No.4

본 연구는 21품종의 장미꽃에 대한 식품 및 화장품 원료로 사용 가능성을 살펴보기 위해 페놀성 화합물과 항산화 활성을 평가하였다. 총 폴리페놀, 총 플라보노이드 및 타닌 함량은 러버샤이 품종에서 각각 379.70 mg GAE/extract g, 50.10 mg CE/extract g 및 339.44 mg TAE/extract g으로 높게 나타났으며, 칠백리 품종에서 각각 107.25 mg GAE/extract g, 9.46 mg CE/extract g 및 36.31 mg TAE/extract g으로 낮았다. 페놀산 함량은 총 폴리페놀 함량과 유사한 결과를 보였으며, 러버샤이 품종에서 27.40 mg/extract g으로 높았다. 안토시아닌은 대부분 cyanidin-3,5-diglucoside로 확인되었으며 총 안토시아닌 함량은 유니나 품종에서 8.80 mg/extract g으로 가장 높았다. ABTS 및 DPPH 라디칼 소거 활성은 각각 428.10 및 419.59 mg AAE/extract g로 러버샤이 품종에서 가장 높았으며, 항산화 활성과 페놀 화합물의 함량과 높은 양의 상관관계를 보였다. 이러한 결과는 러버샤이와 같은 항산화 활성이 뛰어난 품종들이 관상 목적뿐만 아니라 높은 기능성을 가진 식품 및 화장품의 원료로 사용 가능성이 있다고 판단된다. This study evaluated the functional components and antioxidant activities of 21 different rose flower extracts, to confirm their value as a food and cosmetics ingredient. The highest values of total polyphenol, flavonoid and tannin contents (379.70±1.64 mg GAE/extract g, 50.10±0.76 mg CE/extract g, and 339.44±1.20 mg TAE/extract g, respectively) were obtained in Lover Shy. The proanthocyanidin content ranged from 61.88 mg CE/extract g in the Unina cultivar to 5.34±0.13 mg CE/extract g in the Aileen cultivar. The phenolic acid content obtained was highest in the Lover Shy cultivar (27.40±0.26 mg/extract g), whereas highest levels of anthocyanin (8.83±0.03 mg/extract g) were obtained in the Unina cultivar. High ABTS and DPPH radical scavenging activities were determined in the Lover Shy cultivar (428.10±0.29 and 419.59±3.12 mg AAE/extract g, respectively). Taken together, these results indicate that the antioxidant activity and functional components of Lover Shy cultivar are superior, and this extract can potentially be applied as a food and cosmetic ingredient.

맨드라미(Celosia cristata L.) 꽃 메탄올 추출물로부터 용매분획된 분획물의 항산화활성

김현영(Hyun Young Kim),고지연(Jee Yeon Ko),송석보(Seuk Bo Song),김정인(Jung In Kim),서혜인(Hye In Seo),이재생(Jae Saeng Lee),곽도연(Do Yeon Kwak),정태욱(Tae Wook Jung),김기영(Ki Young Kim),오인석(In Seok Oh),정헌상(Heon Sang Jeong),우 한국식품영양과학회 2012 한국식품영양과학회지 Vol.41 No.11

맨드라미꽃의 식품학적 이용가능성을 확인해 보고자 항산화성분 및 항산화활성에 대해 검토하였다. 맨드라미꽃의 항산화성분과 활성은 메탄올 추출물과 순차적 용매분획물에 대해 측정하였으며, 메탄올 추출물과 hexane, chloroform, ethyl acetate, butanol 및 물 분획물의 추출수율은 각각 23.33, 10.27, 20.00, 13.63, 17.55 및 38.54%였다. 맨드라미 꽃 메탄올 추출물의 총 polyphenol, flavonoid 및 tannin 함량은 각각 6.80 ㎎ GAE/g ME, 2.34 ㎎ CE/g ME 및 6.23 ㎎ TAE/g ME였다. 순차적 용매분획물 중 butanol 분획에서 각각 14.92 ㎎ GAE/g SF, 5.44 ㎎ CE/g SF 및 13.38 ㎎ TAE/g SF로 함량이 높았다. 총 proanthocyanidin 함량은 44.72 ㎍ CE/g ME였고 순차적 용매분획물은 각각 42.47, 44.43, 50.03, 49.12 및 41.80 ㎍ CE/g ER로 용매간 유의적인 차이를 보이지 않았다. 맨드라미꽃의 메탄올 추출물의 DPPH 및 ABTS radical 소거활성은 각각 5.24 및 10.70 ㎎ TE/g ME였고 butanol 분획에서 각각 12.53 및 21.09 ㎎ TE/g SF로 활성이 높았다. 메탄올 추출물의 SOD 유사활성은 7.96 unit/mL로 나타났고 hexane, chloroform, ethyl acetate, butanol 및 물 분획물은 각각 4.56, 6.15, 8.07, 12.36 및 5.21 unit/mL로 butanol 분획의 활성이 높았다. 맨드라미꽃 추출물의 항산화성분과 항산화활성 간에 높은 정의 상관관계를 보였고 맨드라미꽃 추출물이 체내 및 식품에서 유익한 도움을 줄 수 있을 것으로 생각된다. The purpose of this study was to evaluate the antioxidant contents and activities of solvent fractions from methanolic extracts of cockscome flowers. The yield of methanolic extracts from cockscome flowers was 23.33%, whereas those of its solvent fractions (hexane, chloroform, ethyl acetate, butanol, and water) were 10.27, 20.00, 13.63, 17.55, and 38.54%, respectively. Total polyphenolic, flavonoid, tannin, and proanthocyanidin contents of methanolic extracts (ME) were 6.80 ㎎ gallic acid equivalent (GAE)/g ME, 2.34 ㎎ catechin equivalent (CE)/g ME, 6.23 ㎎ tannic acid equivalent (TAE)/g ME, and 44.72 ㎍ CE/g ME, respectively. The highest total polyphenolic, flavonoid, and tannin contents of solvent fractions were 14.92 ㎎ GAE/g solvent fraction (SF), 5.44 ㎎ CE/g SF, and 13.38 ㎎ TAE/g SF in the butanol fraction, respectively. The total proanthocyanidin contents were 42.47, 44.43, 50.03, 49.12, and 41.80 ㎍ CE/g SF, respectively. The DPPH and ABTS radical scavenging activities from cockscome flowers were 5.24 and 10.70 ㎎ Trolox equivalent (TE)/g ME, respectively. The highest DPPH and ABTS radical scavenging activities of the solvent fractions were 12.53 and 21.09 ㎎ TE/g SF in the butanol fraction, respectively. SOD-like activities of methanolic extracts from cockscome flowers were 7.96 units/mL, whereas those of its solvent fractions were 4.56, 6.15, 8.07, 12.36, and 5.21 units/mL, respectively. The results of this study show that notable antioxidant activities in cockscome flowers have significant health benefits.

양극성 장애의 우세삽화와 임상양상 간의 연관성 : 예비연구

서호준,우영섭,채정호,전태연,김광수,박원명 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.5

Objective : This study was performed to fmd clinical implications ofdistinctive pattems in bipolar patients with predominance of depressive episodes or manic episodes and to find possibilities to predict predominant episodes in bipolar disorder. Methods : The recmitment period was between 2002 and 2004, among inpatients who had received psychiatric treatment for bipolar disorder. The data about the number and the polarity of the past episodes were collected through medical records, and Sub-jects were divided into depressive or manic episode predominant groups. The two groups were compared regarding Sociodemo-graphic and clinical variables. Results : 74 patients met the inclusion criteria during the study period. 21 subjects were classified as depressive episode Pre-dominant group (depressive episode group), and 53 subjects as manic episode predominant group (manic episode group). There were no differences in sociodemographic data, the number of total episodes and hypomanic episodes, and onset age. However, 90.5% (n=19) subjects of depressive episode group showed depressive episode as first episode, and 88.7% (n=47) of manicepisode group experienced manic episode as first episode (χ²=42.13, df=1, P<0.00l). Psychotic symptomswere significantly more prominent in the manic episode group (χ²=6.85, df=1, P=0.009), and the number ofsubjects who had suicide attempt experience was higher in the depressive episode group (χ²=7.39, df=1, P=0.007). In the comparison of highest GAF scores during the past year, significant difference was found between the two group (p=0.046), as the mean scores of depressive epi-sode group was 68.337±7.47 and manic episode groupwas 71.51±5.42. Conclusion : The results ofthis study show that there are differences in clinical features according to predominant episodes in bipolar disorder. The type of onset episode appears to be related to predominant episode in this study, and it would be a valid Pa-rameter with therapeutic implication in bipolar patients.

음질 평가 기술 연구

서정태 忠州大學校 2008 한국교통대학교 논문집 Vol.43 No.-

Monitoring of speech quality assessment in emerging heterogeneous networks is of great interest to network operators. The most efficient way to satisfy such a need is through Non-intrusive speech quality assessment. In this paper, we review a low-complexity method for monitoring the speech quality assessment. This paper reviews the development of perceptually excited models for quality assessment of speech transmission and storage systems. The main object is to predict subject mean opinion score(MOS) for non-linear, time invariant distortions such as lossy coders, channel errors or noise reduction, particularly for telecommunication application.

분석/합성 음성 부호화기(VSELP)

徐廷泰 忠州大學校 1998 한국교통대학교 논문집 Vol.33 No.2

In recent years, A good technique of low bit rate speech coder is ABS(Analysis by Synthesis) style coder. This paper describes VSELP(Vector sum Error Linear prediction) speech coder. To demonstrate the performance of the VSELP coder, VSELP coder is quantized with 4.8 kbps and it is compared with conventional CELP(Code Excited Linear Prediction) style coder.

펄스 위치 조합을 이용한 저 전송율 부호화 알고리듬의 성능향상

徐廷泰 충주대 2000 한국교통대학교 논문집 Vol.35 No.2

Recently, Enhanced Variable Rate Codec has been adopted as a standard coder for the digital cellular system, and known to provide good call quality at 8 kbps.In this Paper, Efficient algorithm of Enhanced Variable Rate Codec is proposed for an easy implementation. Proposed algorithm's reconstructed speech is measured by objective methods such as SNR, segSNR, and BSD and subjective method(MOS).Enhanced Variable Rate Codec is based on RCELP(Relaxation CELP) and accompanied by complex computational processes. Therefore, simple computational algorithm is proposed in order to alleviate the computational load of Enhanced Variable Rate Codec.The proposed algorithms reduce computational load of fixed codebook search.In the codebook search, computational complexity is reduced down to 60 % of the original Enhanced Variable Rate Codec by minimizing the number of pulse position combination.

音聲 符號化機[G.723.1] 알고리듬 分析

徐廷泰 충주대학교 산업과학기술연구소 2002 産業科學論文集 Vol.10 No.-

In this paper, it is analysed that standard speech encoder[G.723.1] algorithm. This coder has two-bit rates associated with it, 5.3 and 6.3 kbit/s. The higher bit rate has greater quality. The lower bit rate gives good quality and provides system designers with additional flexibility. This coder was optimized to represent speech with a high quality at the above rates using a limited amount of complexity. It encodes speech signals in frames using linear predictive analysis-by-synthesis coding technique. The excitation signal for the high rate coder is Multi-pulse Maximum Likelihood Quantization (MP-MLQ) and for the low rate coder is Algebraic-Code-Excited Linear-Prediction (ACELP). The frame size is 30 ms and there is an additional look ahead of 7.5 msec, resulting in a total algorithmic delay of 37.5 msec.

이진 코드북(Codebook)을 利用한 音聲 符號化器

徐廷泰 충주대학교 1997 한국교통대학교 논문집 Vol.32 No.2

The most important information in human communication is speech.However, since it requires a large number of bits to express speech in digital form,it is essential to develop a high -perfomance speech coding algorithm for low bit rate which uses a limited channel capacity effectively. In this paper, a method improving performance in low bit rate under 4.8 kbps and real-time speech coder is proposed on the CELP(Code Exicited Linear Predictor)-style speech coder, the most remarkable coding method which provides comparatively good quality in low bit rate. A way to improve the performance of the CELP-style speech coder to reduce the time and the computational complexity required by the coding process, the modelling using th statistical codebook utilizes the binary codebook instead of using white haussian noise is proposed. Computer simulation was set to have the transmission rate of 4.8 kbps,and the performance was compared with that of the conventinal stochastic cedebook method and modified binary codebook was proposed

효소고정화막과 반투막성질의 PVA적층막 제조 및 산소센서에서의 특성

서종원,김태진,정용섭,윤정원 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

The oxygen electrode of biosensor needs enzyme immobilized membrane and dialysis membrane for measurement of oxygen concentration, which in solution after enzyme reaction with its substrate. The one-layer PVA laminated CTA/PCL membrane was developed for oxygen electrode of biosensor. Enzymes have immobilized on cellulose triacetate/polycarprolactone membrane by CDI method, and laminated with polyvinyl alcohol, aldehyde and acid. This membrane immobilized with glucose oxidase, ascorbate oxidase, pyruvate oxidase and alcohol oxidase by CDI mehod, and PVA laminated CTA/PCL membrane have been tested with various concentration of substrates of enzymes by use of YSI oxygen sensor. Under 5-10mmol substrates become 0.37-0.83μA(r=0.995) currents, and about 56% of glucose oxidase activity was remained after 8 weeks, others were remained very low. SEM shows smooth surface and tightly attached PVA on enzyme immobilized CTA/PCL membrane.

차세대 인터넷 구조 분석

정연서,이태희,음호식 공주영상정보대학 1998 논문집 Vol.5 No.-

이상과 같이 현재 세계 각 국의 차세대 인터넷 연구 동향과 세계 표준화 단체들의 표준화 동향에 대해서 살펴보고, 제안된 방안들을 적용범위에 따라 분석하였다. 앞에서 지적한 바와 같이 현재 차세대 인터넷을 위한 기반구조로 생각되고 있는 기술은 ATM과 SONET 기반의 인터넷 연동 구조이다. 허나 SONET 기반의 기술은 어느 정도의 트래픽 용량이 넘어서게 될 경우 마찬가지로 트패픽들에 대한 처리가 힘들 것으로 보이며, 우리나라에서 적용하기에는 현재 초고속정보통신망이 ATM으로 구축되어 있는 점을 고려할 때 ATM망 기반의 차세대 인터넷 구축이 적합할 것으로 보인다. 허나 아직 많은 모델들이 구내망에 적합한 구조들로 연구가 진행되어 있으며 광역망 적용을 위한 여러 가지 방안들이 현재 세계 각 국과 여러 표준화 단체들에서 연구가 진행중이며, 이에 대한 진행 상황들을 계속 연구 분석하여 우리나라의 실정에 맞는 모델 선정과 나아가서 독자적인 모델을 설계해 나아가야 할 것이다. 또한 이러한 모델 선정시 구축에 필요한 세부적인 방안들에 대한 연구도 아울러 진행되어야 하며, 모든 망을 한꺼번에 바꿀 수 없으므로 비용이나 성능 그리고 차후에 나올 기술들을 고려해 적절한 단계적인 진화 방안도 수립되어야 한다.