Oil Contents and Fatty Acid Composition of Korean Perilla (Perilla ocimoides L.) Collections

Hong,Seong-Taek,Son,Suk-Yeong,Jong,Seung-keun,Rho,Chang-Woo,Yun,Jong-Sun 한국자원식물학회 2003 Plant Resources Vol.6 No.3

This study was carried out to obtain informations on the variations of oil content and fatty acid composition among 90 Korean perilla collections. Average oil content of 90 perilla collections was 44.2% with a range from 29.7% to 61.9%. Perilla collections with late-maturing, super-large seed and gray seed coat showed higher oil content than other types in general. Average saturated fatty acid content in perilla oil was 9.0% with a range from 8.2% to 10.7%, while average unsaturated fatty acid content varied from 89.3% to 91.8% with a mean of 91.0%. Contents of saturated and unsaturated fatty acids were not related to maturity. There were no differences in the contents of saturated and unsaturated fatty acids according to maturity. Linoleic acid and linolenic acid contents were the highest in the super large-sized group(15.5%) and in the large-sized seed group(61.4%), respectively, while contents of fatty acids among the perilla collections were variable with different seed coat colors. Most of the traits studied were not significantly correlated with oil content, but linoleic acid($\omega$ 수식 이미지-6) content was negatively correlated (r=-0.217*) with linolenic acid(ω-3) content.

연령증가에 따른 혈압요소들의 좌심실비대 및 관동맥질환과의 관련성

박재석,박창규,박미영,박재형,김용현,나진오,신성희,서순용,홍순준,박성미,임홍의,김응주,서홍석,오동주,노영무 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

김치에서 분리한 Lactobacillus sp. JC-7과 Lactobacillus acidophilus 88간의 Electrofusion 최적조건 설정

조영배,최현정,백형석,전홍기 부산대학교 유전공학연구소 1997 분자생물학 연구보 Vol.13 No.-

김치 발효 숙성기간을 연장하고 신선도를 오랫동안 유지 할 수 있는 김치발효 starter의 개발을 목적으로 최적숙성기에 있는 김치로부터 bacteriocin생성능이 없는 유산균을 분리하여 동정하였으며, bacteriocin생성능이 우수한 L.acidophilus 88을 융합시키기 위해 electrofusion에 대한 최적 조건을 검토하였다. 분리균주는 Lactobacillus속으로 동정되어 Lactobacillus sp. JC-7이라 명명하였다. Electrofusion에 의해 생성된 융합주를 식별하기 위해 streptomycin(2.5㎎/ml)에 내성을 나타내는 Lactobacillus sp. JC-7변이주와 kanamycin(600㎍/ml)에 내성을 나타내는 L.acidophilus 88변이주를 분리하였다. Electrofusion을 100V/㎝, 120msec(72ohms,1670 capacitance) 에서 수행했을 때 융합효율이 가장 양호하였으며 전기장의 세기와 시간이 중가할수록 융합 효율이 현저히 감소하였다. 2가 양이온은 농도가 중가할수록 대체적으로 융합효율을 감소시키는 경향을 나타내었으나 1mM MGCl_2에서는 대조군에 비해 융합효율이 약간 증가하였다. PEG매개에 의한 융합법의 융합효율을 비교한 결과, 융합효율은 chemical fusion<electrofusion<electrofusion+20% PEG순을 나타내었다. Evaluation of Optimum Conditions for the Electrofusion between Lactobacillus sp. JC-7 Isolated from Kimchi and Lactobacillus acidophilus 88. Young-Bae Jo, Hyun-Jung Choi, Hyung-Suk Baik and Hong-Ki Jun*. Department of Microbiology, Pusan National University, Pusan 609-735,Korea-A lactic acid bacterium was isolated from kimchi. The isolated strain was identified as the genus Lactobacillus thrugh its morphological characteristics and named as Lactobacillus sp. JC-7. The optimum conditions for the electrofusion between streptomycin(2.5㎎/ml)resistant mutant of Lactobacillus acidophilus 88 and kanamycin(600㎍/ml) resistant mutant Lactobacillus sp. JC-7 were evaluated. The highest number of fusants were obtained at a capacitance value of 120msec(1670㎌), a field strength of 100V/㎝,and a pulse controller setting of 72Ω. The potimum pH of elecroporation buffer was 7.5 and the concentration of divalent cation was 1mM MG^2+. Electrofusants were efficiently obtained by addition 20% polyethylene glycol to electroporation buffer. The yield of fusion was better than that of using polyethylene glycol mediated chemical induction.

전압제어형 DC/DC Converter의 평균 모델을 위한 Duty Cycle 모델

홍성수,사공석진,안현식 국민대학교 생산기술연구소 2002 공학기술논문집 Vol.25 No.-

The conventional average model for a pulse width modulator employed in a voltage-mode-controlled pulse width modulated converter tends to be numerically unstable when the on-time duty ratio becomes sufficiently small. This paper presents a new average model for a voltage-mode control modulator that is not susceptible to such numerical problems. The validity of the proposed model is confirmed with cycle-by-cycle simulations using an exact discrete-time model.

세계산 Rumiceae Dum.족 (마디풀과)의 진화계통학적 연구

홍석표,손세희 경희대학교 자연과학종합연구원 1999 자연과학논문집 Vol.5 No.-

세계산 Rumiceas Dum.족을 구성하는 4속(Rumex속의 4절, Rheum속의 3절, Oxyria속, Emex속) 분류군간의 진화적 유연관계에 대한 가설을 제공하고, 형질진화의 경향을 밝히기 위한 분자분식(cladistic analysis)을 수행하였다. 최소절약의 원리를 이용하여 24개의 두단계 혹은 다단계 형질을 분석하였다. 분석 결과 계통수의 길이는 36, 일관성지수는 0.714, 보존지수는 0.843인 4개의 등가질약 계동수가 산출되었다. Rumex속의 4개 절과 Emex속은 하나의 Clade를 구성하며, 이는 여러 개의 공유파생형질(익상수과, 오용 존서, 만곡의 배, 등)에 의해 지지된다. 결과적으로 Emex속은 Rumex속의 하나의 절(section)로 처리함이 타당하다. 또한 Oxyria속은 3개의 독립파생형질(화사수:2개, 렌즈형의 수과, 4개의 화피핀)에 의해 다른 속과 잘 구별되었다. Cladistic analysis of four genera (4 sections of the genus Rumex, 3 sections of the genus Rheum, Oxyria and Emex) of the tribe Rumiceae Dum. was undertaken to provide hypotheses about evolutionary relationships and to elucidate patterns of character evolution. A set of 24 binary and multistate morphological characters were analyzed using maximum parsimony algorithms. With the given data set. four equally parsimonious trees 36 tree length with a consistency index 0.714 and a retention index of 0.843 were produced. Four sections of Rumex and Emex came together as one clade and was strongly supported by several synapomorphies (e.g.. winged achene. trichome present. curved embryo. etc.). Thus: it is considered that Emex is better treated as one of section in Rumes. Oxyria is also well distinguished by its automorphic characters (by having 2 styles. lenticular achene. 4 perianth segment number).

數學의 公理的 理論에 있어서 眞理의 問題

洪錫浩 건국대학교 교육대학원 1981 敎育論叢 Vol.1 No.-

수학적 대상의 추상적 성격과 이론구성의 공리적 방법은, 전체적으로 과학은 진리의 문제해결이라는 큰 테두리에서 보아야 하며, 폭을 좁혀 실질적 내용을 수반하는 추상적 대상에 관해서는 수학적 개념에 포함된 자연과학의 이론에 의존하여야 된다. 소수의 정의와 공리로부터 정리가 논리적으로 유도되는 수학이론의 공리적 구성에 있어서는, 그 이론의 진리성의 문제는 공리 및증명에 적용되는 논리적 추론방법의 진리성의 문제에 귀착된다. 순수수학에서 증명의 엄밀성은 정리를 수학적 진리로 인정하기 위해서 큰 의의를 갖는다. 수학자는 누구나 정리가 공리로부터 엄밀히 논리적으로 유도되면 그 정리는 증명되었다고 생각한다. 수학에 잇어서 추론의 엄밀성의 기준을 얻으려면, 논리적 연관의 해석을 위해, 형식의 정확한 언어를 적용하는 수학적 논리학에 관해서 연구되어야 한다. 언어의 표현에서 생길수 있는 불명료한 것들은 언어의 힘으로 제거될 수 있다. 학문의 현상에 의해서 생길 수 있는 수학적 진리에 관련되는 몇 가지 문제는 순 수학적 방법으로 해결가능하다. 그러나, 보다 상세히 분석해 보면 증명의 엄밀성이란, 개념 그 자체와 마찬가지로, 본질적으로는 추론의 이론적 원칙과 방법등의 진리성에 있어서 특히 철학적 분석을 필요로 하고 있다.

Planococcus屬 菌株가 生成하는 Alkaline Lipase

洪淳德,李淑喜 慶北大學校 1983 論文集 Vol.36 No.-

A microorganism producing alkaline lipase strongly was isolated. The optimal condition to produce alkaline lipase by the selected strain was as follows; the medium was composed of 2% sucrose, 3% soybean meal, 0.6% K_2HPO_4 0.1%(NH_4)_2SO_4 0.1% urea, and 0.1% MgSO_4, 7H_2O., and the initial pH was 8.0 to 8.5 and culture time was 48hr. The lipase of the culture supernatant was purified by fraction-with ammonium sulfate at 30-50% saturation, followed by DEAE-cellulose chromatography. The specific activity of the purified enzyme was about 7.8 times over that of the starting centrifugate, and the yield was about 8.05% of the original activity. The enzymatic characteristics is included as follows; optimal pH of the enzyme was 9.0, and the stable pH range was between 6 to 10, and optimal temperature was 55C. And more than 85% of the enzyme activity remained after exposure at 60C for 30 min. Lipase activities were stimulated in the presence of Ca^++ and Mg^++, and inhibited in the presence of Hg^++ and Cu^++ The enzyme was apt to hydrolyze oils containing natural triglycerides plentifully. On the basis of the taxonomical studies, the selected strain was identified as Planococcus sp.

정상 성인에서 Amitriptyline이 수면구조와 정신생리적 기능에 미치는 영향

홍성곤,신석철,왕성근 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.1

To investigate the effects of Amitriptyline on sleep structure and psychophysiologic function in normal adults, author applied polysomnography for sleep structure, reaction time for attention and visual analogue test for daytime fatigue, mood and sleepiness to the volunteers. The subjects were 8 healthy young adults, aged from 20 to 24 years old. The results were summarized as follows. 1. In normal adults, there were great individual variations in the ditribution of relative value(%) of sleep structure. 2. Compared with the baseline, total sleep time and sleep efficiency increased significantly in the 2lmg amitriptyline night, and WASO decreased significantly in the second recovery night. 3. Compared with the baseline, the absolute value(minutes) of stage 1 sleep decreased significantly in the amitriptyline, first and second recovery nights, and the relative value(%) of stage 1 sleep decreased significantly in the first recovery night. The absolute and relative value of stage 2 sleep increased significantly in the amitriptyline night. The relative value of slow wave sleep decreased significantly in the first recovery night. 4. Compared with the baseline, the absolute and relative value of REM sleep decreased significantly in the amitriptyline night, the relative value of REM sleep increased significantly in the first and second recovery nights, and REM latency shortened significantly in the first and second recovery nights. 5. Feeling of fatigue, depressed mood and sleepiness increased in the afternoon the day after amitriptyline administration. 6. 1) In the baseline, daytime sleepiness was positive correlation with feeling of fatigue and mood. 2) The day after amitriptyline administration, relative value of REM sleep was negative correlation with feeling of fatigue and sleepiness, daytime fatigue was positive corelation with mood and sleepiness, and daytime mood was positive correlation with sleepiness. 3) In the first recovery day, daytime fatigue was positive correlation with mood and sleepiness, and negative correlation with reaction time, daytime mood was positive correlation with sleepiness, and reaction time was negative correlation with sleepiness. 4) In the second recovery day, total sleep time was positive correlation with the relative value of REM sleep time, the relative value of stage 2 sleep was negative correlation with the relative value of slow wave sleep, the relative value of slow wave sleep was positive correlation with daytime fatigue and mood, daytime fatigue was positive correlation with mood and sleepiness, and negative correlation with reaction time, daytime mood was positive correlation with sleepiness, and reaction time was negative correlation with sleepiness.

자외선 경화형 불포화 폴리에스테르 수지의 합성과정이 저장안정성에 미치는 영향

洪錫杓,崔相久 全北大學校 1992 論文集 Vol.34 No.-

Storage stability of UV curable unsaturated polyester was studied in accordance with synthesis process and inhilitor charging. When resin was synthesized at 160∼170℃, storage stability was mainly influencd by reaction time. THQ showed best storage stability among inhibitors. Appropriate charge of THQ was 150ppm in initial of first reaction, 350ppm in initial of second reaction and 350ppm in SM thinning.

콩의 식품적 의의 및 생산수급과 식용콩의 자급 향상

이홍석,이영호,이석하 대한민국 학술원 2011 학술원논문집 : 자연과학편 Vol.50 No.2

콩은 단백질 공급을 비롯하여 영양가가 높아 예로부터 우리의 중요 식품으로 널리 다양하게 이용하여 왔을 뿐 아니라 지속적인 밭작물 재배를 가능케 하는 중요한 역할을 하여 왔으며, 최근에는 건강식품으로 또 친환경 농업 작물로 주목을 받고 있다. 콩은 세계적으로 99,501천ha에서 223,185천톤(2,243kg/ha)이 생산되고 그의 35.5% (35,130백만불)가 수출되고 그 중 43%는 미국 콩이, 96.5%는 미대륙 생산 콩이 수출되고 있으며, 수입의 반 정도는 중국이, 37.6% 정도는 유럽의 선진국과 일본 등 10여 개국에서 각각 수입하고 있고, 우리나라도 10번째의 수입국이며 세계적 소비수요는 계속 증가되고 있다. 우리나라는 1968년의 313,501ha의 재배에서 계속 감소하여 현재는 75,242ha에서 132,674톤이 생산되고 1,261천톤이 수입되었으며, 전체 자급률은 수요량 1,333천톤의 8.6%, 식용 및 기타는 수요량 387천톤의 29.5%에 불과하다. 콩, 특히 식용콩의 증산에 의한 자급율 향상은 경지정리 및 주산단지 조성을 통한 생력기계화 재배를 전제로 첫째, 밭의 작부체계 개선 둘째, 논의 밭 전환재배 셋째, 북한의 동해안 지대의 밭을 장기임대하여 재배하고 그 대가를 쌀 지원으로 하는 것이며 넷째는 인접국에서 밭을 매입 또는 장기 임대하여 생산 공급하는 방법 등을 생각할 수 있을 것이다.