• 한국자원식물학회지
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• 제27권3호
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• pp.229-235
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• 2014

Flax (Linum usitatissimum L.) has been used for the edible oil in Korea. The evaluate the effect of plant growth retardants on flaxseed yield, oil content, and gibberellin level, chloromequat chloride (CMC), paclobutrazol (PBZ), and prohexadione-Ca (PHC) were used as plant growth retardants in this study. These plant growth retardants were foliar-sprayed to flax plant at 55 days after seeding. The concentrations of each plant growth retardant were as followed: CMC 250, 500, 1000 ppm, PBZ 40, 80, 160 ppm and PHC 500, 1000, 2000 ppm. PHC treatment to forming bolls was more stimulated than CMC and PBZ. The highest ripened seed rate was observed in PHC treatment at 2000ppm. The high see yields were obtained in PHC treatment following PBZ and CMC, in turn. Seed yield that significantly increased in PBZ and PHC was found to be increased 12.4 ~ 23.9% as compared to the control. The PHC showed higher flaxseed production and oil yield than that of CMC and PBZ. The results obtained in the present study suggest that higher concentration of plant growth retardant (PHC) increased flaxseed yield and oil content. The optimal concentration of PHC treatment was observed in 2000 ppm. It concludes that the foliar application of PHC 2000 ppm may be useful for the increasing oil and higher seed production in flax plants.

• Advances in aircraft and spacecraft science
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• 제6권2호
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• pp.157-168
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• 2019

The production of nonwoven fabrics from natural fibers is already expanding at an industrial level for simple curvature semi-structural part in the automotive industry. To develop their use for technical applications, this paper provides an experimental study of the mechanical behavior of flax-fiber nonwoven preforms. A comparison between different sets of carded needle-punched nonwoven has been used to study the influence of manufacturing parameters such as fibers' directions, the area and the needle punching densities. We have found that the anisotropy observed between both directions can be reduced depending on these parameters. Furthermore, this work investigates the possibility to form double curvature parts such as a hemisphere as well as a more complex shape such as a square box which possesses four triple curvature points. We propose a forming process adapted to the features of the nonwoven structure. The purpose is to determine their behavior under high stress during various forming settings. The preforming tests allowed us to observe in real time the manufacturing defects as well as the high deformability potential of flax nonwoven.

• 한국작물학회지
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• 제34권3호
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• pp.225-228
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• 1989

재식밀도 차이에 따른 Wiera 등 3품종의 성숙기, 경장, 유분함량, 원경중 및 종실중 변화를 시험한 결과를 요약하면 다음과 같다. 1. Wiera와 Storment Goss는 밀식할수록 숙기가 단축되었으나 Taijungsun #1은 늦어져 조숙종과 만숙종의 성숙기에 대한 반응이 달랐다. 2. 품종에 따라 차이는 있으나 밀식할수록 경장이 길어지는 경향이었다. 3. 유분함량도 밀식할수록 높아지는 경향이었다. 4. 원경중과 종실종은 밀식할수록 증수되었으나 1.2m$^2$당 1,200주 이상으로 밀식할 때는 모아마의 발생으로 오히려 감수되었다. 따라사 아마재배의 적정재식밀도는 휴간 12cm$\times$주간 6cm(600주/1.2m$^2$)이었다.

• 한국작물학회지
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• 제61권2호
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• pp.124-130
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• 2016

아마(Linum usitatissimum L.)의 기름과 줄기섬유는 다양한 용도를 가지고 있어 최근 들어 주목을 받고 있는 작물이다. 본 연구는 아마의 활용도 제고를 위해 아마 유전자원 121점에 대해 농업형질, 지방산 조성, 조지방 및 조단백질 함량을 분석하여 신규 경관작물 및 유지작물 개발의 기초 자료로 활용하고자 수행하였다. 아마는 재배기간이 75~95일로 짧고, 키가 52~124 cm 정도 자라며, 꽃색이 흰색, 연보라색, 진보라색, 및 보라색으로 크게 4종류로 나타났다. 개화시가 빠른 유전자원들은 모두 꽃색이 백색이고, 도복에도 강하게 나타났을 뿐만 아니라 성숙기와 생육기간은 짧고, 초장, 주당분지수, 경태, 주당삭수, 삭당종자립수, 천립중, 및 종실수량은 감소하는 것으로 나타났다. 아마의 지방산 조성은 팔미트산(C16:0) 5.3%, 스테아린산(C18:0) 4.3%, 올레산(C18:1) 29.7%, 리놀레산(C18:2) 13.1 및 리놀렌산(C18:3) 46.4%로 나타났다. 리놀렌산 함량이 51% 이상인 유망 유전자원 10점 중에서 임의로 선발한 5점(Hollandia 1803, Red son, C & F Res Br 1767, Wiera, Ireland 1657)에 대한 조지방과 조단백질 함량의 범위는 각각 30~36% 및 5.4~6.9%로 나타났다. 본 연구결과를 종합해 볼 때 아마는 재배기간이 3~4개월로 짧아 기타 동 하계 작물과 작부체계상 매우 유리하고, 꽃색이 흰색, 연보라색 및 진보라색으로 다양하여 경관작물로도 활용이 가능할 것으로 기대된다.

• 한국지역사회생활과학회지
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• 제27권4호
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• pp.795-801
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• 2016

This study was conducted to suggest the best union fabric to combine with cellulose fiber for summer and in-between seasons. Four types of union fabric, viz. silk/flax, silk/cotton, rayon/flax and rayon/cotton, were used as sample fabrics after weaving them in a local textile factory. The air permeability, moisture regain, water absorption, water vapor permeability and thermal insulation of the samples were tested. The results are as follows. The rayon/flax union fabric is the most suitable for summer clothes due to its having the best comfort property of air and water vapor permeability, and moisture and water absorption. For in-between seasons, it is recommended to use the silk/cotton union fabric because of its good thermal insulation properties.

• 복식
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• 제18권
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• pp.283-289
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• 1992

In this paper, dyeing properties and colorfastness of ramie, flax, and cotton fabrics for direct dyes were compared. When dyed in a same liquor-goods ratio, in case of green dyes, colorfastness to light was similar for three fibers but in case of red dyes, cotton had a lower level. For colorfastness to laundering, there fibers were similar and three were no consistent differences. The degree of stain about white cotton fabric was higher in case of red dyes and it showed the difference of dye's properties. The degree of stain about white wool fabric showed the highs resistance or stain and little stain was seen. This result represented that the dyes. used were proper direct dyes for cellulosic fibers. For the difference of shade, the cotton was consistently brighter and the shade of ramie was darker than that of cotton and flax. This might mean that optical effects arose from the comparatively large cross-sectional size of the ramie fiber and its highly oriented structure.

• 한국염색가공학회지
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• 제12권3호
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• pp.174-182
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• 2000

We prepared natural indigo/calcium hydroxide complex powder from tinctoria's leaf, according to the demand of developing new dyeing technique of natural fibre with natural indigo. FT- IR and UV/Visible spectra were operated to find the dyeing properties of synthetic indigo and natural indigo powder. Cotton, flax and silk fabrics were dyed with different pH, dye concentration and dyeing time. The colour yield of indigo dye was quite sensitive to dye bath pH and fabric. In synthetic indigo, the highest K/S value of dyed silk fabric was shown at near pH 9.0, and which of flax and cotton fabric were shown at pH 11.0. In other hand, in the case of natural indigo complex powder, the highest K/S value of dyed silk fabric was shown at near pH 8.0, and which of flax and cotton fabric were shown at pH 9.5∼pH 10. Mercerized cotton fabric dyed with natural indigo powder has a little antimicrobial activity.

• International Journal of Aerospace System Engineering
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• 제3권1호
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• pp.17-20
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• 2016

In this work, a structural design on horizontal axis wind turbine blade using natural flax fiber composite is performed. The structural design results of flax/epoxy composite blade are compared with the design results of glass/epoxy composite blade. In order to evaluate the structural design of the composite blade, the structural analysis was performed by the finite element method. Through the structural analyses, it is confirmed that the designed blade using natural composite is acceptable for structural safety, blade tip deflection, structural stability, resonance possibility, and weight. Finally, structural test of manufactured blade was performed. Through the structural test, it is confirmed that the designed blade is acceptable.

• 한국생활과학회지
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• 제7권2호
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• pp.75-80
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• 1998

In this paper, deying properties and colorfastness of ramie, flax, and cotton fabrics for direct dyes were compared. When dyed in a same dyeing bath ratio, in case of green dyes, colorfastness to light was similar for three fabrics but in case of red dyes, cotton had a lower level. For colorfastness to laundering, three fabrics were similar and there were no consistent differences. The degree of stain about white fabric cotton was highest in case of red dyes. The degree of stain about white fabric wool showed the high resistance of stain and little stain was seen. This result represented that the used dyes were proper direct dyes for cellulosic fibers. For the difference of shade, the cotton was cosistently brighter and the shade of ramie was darker than of cotton and flax. This might mean that optical effects arouse from the comparatively large cross-sectional size of the ramie fiber and its highly ordered structure.

• 한국자원식물학회지
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• 제24권6호
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• pp.696-701
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• 2011

The aim of this field experiment was to investigate the possible effects of mepiquat chloride (TE) and trinexapac-ethyl (MC) on oil composition, seed yield and endogenous gibberellins content of flax cultivar. Foliar application of plant growth retardants mepiquat chloride (0.897, 1.794 and 2.691 kg a.i. $ha^{-1}$) and trinexapac-ethyl (0.756, 1.512 and 2.668 kg a.i. $ha^{-1}$) had significantly increased seeds ripening rate and seed yield. In contrast, plant height was decreased by foliar application of MC and TE. The application of MC significantly increased seed oil yield (730 kg $ha^{-1}$ by 27.0%) compared to the control. Seed and oil yield, and unsaturated fatty acids (oleic acid, linoleic acid and linolenic acid) were increased by foliar application of MC.