• 한국염색가공학회지
• /
• 제11권6호
• /
• pp.18-23
• /
• 1999

PET POY(pre-oriented-yam) were treated by false twister to high bulky. False twister have many processing parameters velocity ratio(VR), belt cross angle$(\theta)$, 1st heater temp. and K(twisting tension/untwisting tension). we analyzed the effect of properties of textured polyester yam on processing condition. Initial modulus, thermal stress, No. of snarl is decreased by 1st heater. In VR=1.97, Dry and wet shrinkage is increased but is decreased by 1st heater in VR=1.564. K/S and cristallinity tend to increase by decreasing VR.

• 한국염색가공학회지
• /
• 제20권2호
• /
• pp.47-52
• /
• 2008

Nylon textured yarn is usually manufactured by disk type false twist texturing. Dyeing properties of nylon textured yam have not been studied yet. In this study, dyeing properties of nylon textured yam according to draw ratio out of process parameters were investigated. The fact that microstructure of nylon textured yarn in amorphous region particularly is transformed by draw ratio was confirmed indirectly by measurement of dyeing rate because dyeing rate was affected by the structure of amorphous region. Dyeing rate at draw ratio 1.29 was the lowest because the higher draw ratio increase amorphous orientation and disturb dye diffusion into amorphous region. The microstructure according draw ratio was indirectly confirmed by 5% strength, tenacity, elongation. But difference in K/S value and fastness was insignificant.

• 한국염색가공학회지
• /
• 제18권5호
• /
• pp.61-71
• /
• 2006

This paper addresses the factors hindering the image quality of lines in inkjet printed on polyester fabric as printing media. Lines were printed onto different types of polyester fabrics in warp and filling directions. Line image quality including line width, edge blurriness, and edge raggedness was assessed. The effect of capillary wicking on line image quality of printed spun polyester fabric is discussed. The factors on the image quality include printing position(top of the yam or between the yarn), printing direction(warp or filling), yarn structures(filament or spun), thread size(yam or fiber), finishing, and ink properties(evaporation rate). More than 30% differences in image quality results were observed by changing the printing location on the spun polyester fabric. The best results of the image quality were obtained with the printed plain and spun polyester fabrics. The fiber sizes may affect capillary size; therefore, the image quality can be dissimilar. Types of finishing materials and inks greatly improve the line image quality on spun polyester fabrics.

• 한국염색가공학회지
• /
• 제16권6호
• /
• pp.35-43
• /
• 2004

This study surveys the physical properties of ATY produced with FDY and POY. ATY is made with 70d Nylon FDY and 80d Nylon POY using AIKI air jet texturing machines, respectively. The processing parameters such as air pressure and yam speed are varied, and air pressure is varied ranging with 8.5bar, l0.5bar and 1l.5bar, and yarn speed is varied ranging with 400m/mim, 450m/mim, and 500m/min. The various physical properties of ATY made by POY and FDY denier, wet shrinkage, dry shrinkage, tensile properties, thermal stress and instability are measured and discussed with air pressure and yam speed. The shrinkage simulation of ATY is performed for analysing the process shrinkage on the dyeing and finishing processes.

• Fibers and Polymers
• /
• 제4권4호
• /
• pp.161-168
• /
• 2003

An investigation of the dimensionless torque in the newly developed cone drum twister texturing mechanism is reported. The cone drum twister is one of the outer surface contacting friction-twisting devices in false-twist texturing. In this cone drum twister, a filament yam passes over the surface of the cone drum that rotates by the passing yarn without a special driving device. This research is composed of the theoretical analysis of the false twisting mechanism and the experimental analysis at room temperature. The equations have been derived which shows interrelationship of the conical angle of cone drum, the wrapping angle, the drag angle, and the yam helix angle. Theoretical values of dimensionless torque were calculated and were compared with the experimental results. It is shown that, as the conical angle and the projected wrapping angle increased, the dimensionless torque also increased. But the conical angle was reached to ${30.75}^{\circ}C$, the dimensionless torque decreased.

• 통상정보연구
• /
• 제10권3호
• /
• pp.197-219
• /
• 2008

The aim of this paper is to review KORUS FTA Rules of Origin. Although there are some differences in terms of structure and contents, KORUS FTA Rules of Origin is not much different from the other FTA's texts that Korea has already concluded. Textile and Apparel chapter is also separately specified. For textile and apparel goods, Korea and the US agreed to adopt 'yam-forward rule', allowing exceptions for certain goods. Both sides also agreed to introduce procedures for permitting to use non-Party's materials when fibers ryarns rfabrics are not available in commercial quantities. Overall evaluation on KORUS FTA is considered to be positive. Economically, KORUS FTA is expected to provide good opportunities for Korean companies to access the US market. Politically, Korea and the US can take advantage of KORUS FTA to reinforce the relationship between the two countries.

• 한국자원식물학회지
• /
• 제22권6호
• /
• pp.546-551
• /
• 2009

We examined the growth characteristics, fresh tuber yield, rotenone content of two yam beans (Pachyrhizus erosus and P. ahipa) introduced from Mexico. P. erosus species showed better adaptable ability than P. ahipa species in seed productivity and tuber yield. Rotenone content in the P. erosus species extracted with chloroform was 3.6 folds much more extracted than ethanol extraction. The order of rotenone content found in crude extract obtained by different solvent extraction from the highest to the lowest was mature seed (484.7 ${\mu}g$) and leaves (17.2 ${\mu}g$) of the P. erosus species, respectively.

• Applied Biological Chemistry
• /
• 제37권6호
• /
• pp.509-515
• /
• 1994

한국산 마의 주요 품종인 Dioscorea batatas, D. aimadoimo and D. japonica 3가지 품종의 시료들을 동결건조하여 분말로 만든 다음 지질의 추출, silicic acid column chromatography에 의한 지질의 분획, thin layer chromatography에 의한 지질의 분리 및 gas chromatography에 의한 지방산 조성 등을 행하였다. 총지질의 함량은 D. japonica가 다른 마에 비해 적은 편이었으며, 지질을 분획한 결과 3가지 품종 모두 중성지질이 가장 많았고 그 다음 당지질, 인지질 순으로 나타났다. 분획한 각 지방의 구성 지질로는 중성지질이 sterolester, triglyceride, 1,3-diglyceride, 1,2-diglyceride 및 monoglycerid였고, 당지질에서 acylsterylglycoside, sterylglycoside, digalactosyldiglyceride 및 sulfolipid였고, 인지질에서 phosphatidylethanolamine, phosphatidylcholine 및 phosphatidylinositol 이었다. GC에 의한 총지질의 지방산 조성은 팔미트산과 리놀레산이 가장 많은 부분을 차지하였고 불포화지방산 함량이 포화지방산 함량보다 많았다. 또한 중성지질, 당지질 및 인지질의 지방산 조성도 총 지질을 구성하는 지방산 조성과 같은 양상을 보여 주었다.

• 한국약용작물학회지
• /
• 제14권3호
• /
• pp.163-167
• /
• 2006

본 연구는 마의 지상부에서 형성되는 주아를 이용하여 이듬해 종서로 사용 가능한 씨마 생산을 위한 주아 재배법을 개발하기 위하여 수행하였으며, 파종기, 파종량, 파종주아 크기에 따른 씨마 수량을 검토하였다. 1. 주아 파종기가 늦어질수록 생장 일수가 짧아져 괴경장이 짧아지고 평균 괴경중이 가벼워지는 등 괴경의 크기가 작아졌다. 5월 11일 파종의 경우 씨마용으로 사용할 수 없는 무게가 20g 이하 되는 괴경수가 많아짐으로 파종은 늦어도 5월 1일까지 이루어져야 할 것으로 판단된다. 2. 파종량이 많을수록 괴경장이 짧아지고 평균 괴경중이 가벼워지는 등 괴경의 크기가 작아지므로 마로 사용 가능한 $21{\sim}4kg$ 크기의 괴경수를 고려할 때 200kg/10a가 파종 적량으로 판단되었다. 3. 파종주아의 크기가 클수록 출아율과 평균 괴경중이 높아져 단위 면적당 괴경 수량이 높게 나타났다.

• 한국식품조리과학회지
• /
• 제11권4호
• /
• pp.351-355
• /
• 1995

용매(MeOH, EtOH, CHCI$_{3}$/MeOH Water)를 달리한 마추출물의 broiling과 panfrying의 조리법 변이원과 2-AF, benzo(a)pyrene, sodium azide 등의 화학적으로 유도된 순수변이원에 대한 억제효과를 검색하였다. 대사활성물질인 S9 mixture 무첨가시 조리법 변이원에 대한 변이원과 용매종류 및 변이원과 용매사이의 상호관계성은 유의적인 차이를 보였으나, S9 mixture 첨가시에는 변이원, 마, 용매종류들사이 에 유의성을 보였다. 특히 S9 mixture 첨가시 높은 억제효과를 보였던 산마 EtOH 추출물은 panfrying 변이원에 대한 억제효과는 컸으나 조리법 변이원에 포함되었을 것으로 예상되었던 benzo(a)pyrene에 대해서는 억제효과가 낮았다. 순수변이원로서 sodium azide에 대한 마추출물은 산마가 25.4%로, 9.1%인 재배마보다 높았으나 용매에 따른 유의성은 없었다. 2-AF는 마종류에 대한 유의성은 없었으나 Water가 26.2%, MeOH가 41.9%, EtOH가 45.0%, CHCI$_{3}$/MeOH가 84.0%로서 높은 억제효과를 보였다. 특히 산마의 CHCI$_{3}$/MeOH 추출물은 plate당 10 mg 농도에서 가장 높은 91.5%의 억제효과를 보였을뿐 아니라 plate당 1 mg 농도에서도 67%의 높은 억제효과를 나타내었다. 이상과 같이, 본 실험에 사용된 변이원 중 2-AF에 대한 산마 CHCI$_{3}$/MeOH 추출물이 단위 추출물당 억제활성이 가장 높은 것으로 나타났다.