• Applied Biological Chemistry
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• v.42 no.2
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• pp.176-179
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• 1999

In the bioactivity test of nine sesquiterpene lactons isolated from Hemisteptia lyrata, Chrysanthemum zawadskii and Chrysanthemum boreale, we investigated their antimicrobial activities against ten bacteria and six phytopathogenic fungi. Hemistepsin A and hemistepsin B isolated from H. lyrata and tulipinolide isolated from C. boreale exhibited strong antibacterial activity. In the antifungal test, hemistepsin B, angeloylcumambrin B, tigloylcumambrin B and costunolide showed broad activity. Both antibacterial and antifungal experiments exhibited quite clear specificity against microbial strains.

• Weed & Turfgrass Science
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• v.3 no.4
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• pp.253-261
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• 2014

In this study, we investigated several chemical and physical characteristics of 4 weed seed fibers; Hemistepta lyrata (HEMLY), Imperata cylindrica var. koenigii (IMPCK), Metaplexis japonica (METJA) and Typha latifolia (TYPLA). In chemical composition, there were 74 (TYPLA)-88.5% (METJA) of holocellulose, 17 (IMPCK)-24% (METJA) of lignin, 0.22 (METJA)-4.2% (IMPCK) of ash, 2.2 (HEMLY)-7.8% (IMPCK) of hot water extractives and 0.4 (IMPCK)-6.3% (TYPLA) of solvent extractives. Alpha-cellulose proportion to holocellulose was similar among weed seed fibers as 45-48%. The crystallinity index (CI) of raw seed fibers was 53.2 (TYPLA)-65.9% (HEMLY). However, CI of the chemical treated fibers (EDA fibers) was a little increased and showed 61.1 (IMPCK)-71.8% (METJA). The maximum thermal decomposition temperature (MTDT) of the raw seed fibers were 312, 321.8, 331.5 and $341.6^{\circ}C$ in METJA, TYPLA, HEMLY and IMPCK, respectively. But the MTDT of the EDA fibers were 327, 327, 341.7 and $360.0^{\circ}C$ in HEMLY, TYPLA, METJA and IMPCK, respectively. Taken together, they showed a similar or better characteristics compared to the reported or commercial natural fiber resourses. Accordingly, they seem to be practically applicable as renewable resources for a new natural fibers.

• Weed & Turfgrass Science
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• v.3 no.3
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• pp.196-205
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• 2014

In this study, to obtain basic data for searching potential resources as new natural fibers, we investigated morphological and classificatory characteristics of 21 weed seed fibers. According to classification keys in this study, the collected weed seed fibers could be classified into total 13 types, showing their diversity. Seven species among them belonged to BOT3 type. Two species belonged to B2N0 and DOS3 type, respectively. Many of weed seed fibers had not branched. However, three species had various branched fibers at one main fibers on the seed. Three species had various branched fibers at several main fibers on the seed. Eight species had a smooth fiber surface but 13 species had a weakly or significantly developed-corniculum on the fiber surface. In the fiber cell shape, fiber cells of eight weed species were composed of one long cell without septum. But others had a fiber cell shape composed of a bunch of several long cells. Based on the easiness of harvesting, productivity of fibers, and morphological characteristics of seed fiber, it seemed that five seed fibers (TYPLA, METJA, HEMLY, IMPCK, and EREHI) should be additionally investigated if they are practically applicable as renewable resources for new natural fibers.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.27-28
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• 2019

본 논문에서는 한국 사회에 특유의 폭력성과 선정성으로 인해 큰 충격을 주고 있는 인터넷 커뮤니티 사이트 '일간 베스트' 글에 나타난 욕설과 여성 혐오에 대해 분석하고자 한다. 데이터는 일베 게시판에 올라온 게시글 2,000개를 웹 크롤링하여 수집하였으며, 수집한 게시글에 게임 내 금칙어 리스트와 여성 지칭어 사전을 기반으로 욕설 여부와 여성 지칭어를 태깅하였다. 태깅하여 분석한 결과 여성 지칭어를 사용한 게시글에는 욕설을 사용하는 글이 전체의 60.52%로 많았으며 욕설을 사용하지 않은 게시글에도 범행, 살해, 김치녀 등의 부정적인 단어가 많은 것을 볼 수 있었다.

• Product Safety
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• s.53
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• pp.14-17
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• 1997

소비자라는 용어는 공급자 중심 체제하에서 공급자인 기업이 상품소비대상을 지칭하는 개념이였다. 물자부족, 인력과잉현상이 지속되던 시대에서는 공급자를 제외한 모든 구매자는 물자는 소비하는 층이었다. 그러나 이제 그 소비자 개개인의 독특한 개성을 기준으로 상품을 선택하는 시대가 된 것이다. 따라서 기업경영자로서의 우리는 이제부터 구매자를 소비자라는 개념에서 고객이라는 개념으로 바꾸어 부르도록 하자.

• Proceedings of the Korean Fiber Society Conference
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• 2003.04a
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• pp.21-24
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• 2003

SiO$_2$ 입자는 촉매, 촉매의 담체, 크로마토그래피를 위한 충진제등 여러 산업에 응용되고 있다.$^{1)}$ 본 연구 에서는 기능성을 가지는 입자를 제조하기 위해 SiO$_2$로써 기본적인 입자를 제조하고, 그 속에 소취특성을 가지는 TiO$_2$와 날염을 위한 EVA-microsphere를 포함시켜서 소취제로서, 그리고 날염 분체로서의 기능을 가진 입자들을 제조하고자 하였다. 실리카(silica)는 일반적으로 규소산화물을 지칭하는 명칭으로서, SiO$_2$뿐 아니라 결정구조상 4-6개의 산소원자로 둘러싸인 모든 형태의 규소산화물을 지칭 하는 것이고$^{2)}$ 수용액상의 물유리는 실리카 졸의 값싼 상품으로 산업분야에 널리 알려져 있다. (중략)

• Korean Journal of Pharmacognosy
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• v.33 no.2 s.129
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• pp.92-95
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• 2002

Three diene-yn-diene chromophore type compounds were isolated from the flowers of Hemisteptia lyrata Bunge. On the basis of spectral data, isolated compounds were identified as heptadeca-1,7,9,13,15-pentaen-11-yne, 14-acetoxy-2,4,8,10-tetradecatetra-ene-6-yne and 14-hydroxy-2,4,8,10-tetradecatetraene-6-yn. They were first isolated from the genus of Hemisteptia.

• Korean Journal of Pharmacognosy
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• v.32 no.3 s.126
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• pp.238-241
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• 2001

The leaves and flowers of Hemisteptia lyrata Bunge (Compositae) have been used for cure sour throat and treat tumors in traditional chinese medicine. As a result of the chemical investigation, two compounds were isolated from the $CHCl_3$ extract of the flowers of H. lyrata. On the basis of spectroscopic experiments, their structures were identified as 8-hydroxy-3-keto-10(14)-guaien-12,6-oxide (Isoamberboin) and 3,8-dihydroxy-4(15),10(14),11(13)-guaiatrien-12,6-oxide (8-Hydroxyzaluzanin C). They were first isolated from the genus Hemisteptia.

• Applied Biological Chemistry
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• v.38 no.6
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• pp.584-589
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• 1995

To select new useful plants with antibacterial activity, ninety five sample of eighty different species of wild plants were collected, and extracted with methanol. Antibacterial activity of the methanol extracts was tested against Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Vibrio parahaemolyticus. The methanol extracts from Artemisia capillaris, Hemistepta lyrata, Youngia japonica, Prunella vulgaris, Lamium amplexicaule and Juniperus chinensis was effective against all bacterial strains tested, and eight methanol extracts including Ixeris dentata, Gnaphalium affine, Chelidonium majus and Spiraea prunifolia exhibited the antibacterial activity against at least 3 bacterial strains. Methanol extracts from leaf of Syringa vulgaris, Drava nemorosa and clove of Erythronium japonicum showed a selective antibacterial activity against two gram negative bacteria, V. parahaemolyticus, and B. subtilis, respectively. With investigations on antibacterial activity against a certain bacterial strains tested, metahnol extracts from clove of Erythronium japonicum, Spiraea prunifolia, leaf and twig of Camelia japonica, and Drava nemorosa showed strongest activities against B. subtilis, S. aureus, E. coli, and V. parahaemolyticus, respectively. Nine methanol extracts based on the results were successively fractionated with n-hexane, chloroform, ethyl acetate and water portions, which were examined antibacterial activity against B. subtilis and V. parahaemolyticus. Among the all fractions tested, chloroform fractions of Hemistepta lyrata showed strongest antibacterial activity against both B. subtilis (17mm) and V. parahaemolyticus (29 mm). Chloroform fractions of Youngia japonica, n-hexane fractions of Artemisia capillaris, Iexeris dentata and Prunella vulgaris, and ethyl acetate fraction of leaf and twig of Camelia japonica showed relatively a strong antibacterial activity. On the other hand, Juniperus chinensis and Equisetum arvense was distributed to all fractions except for water fraction.

• Korean Journal of Cognitive Science
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• v.20 no.4
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• pp.439-479
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• 2009

This paper examines the aspects of the inferences between the dimensional terms in Korean, and attempts to give an account of the inference patterns based on the interaction of gestalt and position properties of spatial objects. Following Lang (1987) and Lang, Carstensen & Simmons (1991), we advance the idea that the inferences are possible for the same axis of a spatial object, if some contextually induced positional specifications are reversed to the inherent proportion schema. Two simple inference rules are proposed and justified. They are applied under the assumption that the inferences of the dimensional terms are drawn in a unidirectional way, i.e, from the Primary Perceptional Space to the Inherent Proportional Schema.